| Entries |
| Document | Title | Date |
|---|
| 20080203945 | Describing Two Led Colors as a Single, Lumped Led Color - A light emitting diode (LED) lighting system for producing white light is disclosed. The system comprises sets of LEDs arranged to emit light with different wavelength ranges and associated with different sets of characteristics, and a driving circuit arranged to drive the LEDs. The driving circuit comprises an input for desired light intensity, color rendering index, and color temperature, an input for signals for LED temperature, a model for determining driving currents for said sets of LEDs from said parameters, signals, and characteristics for each of said sets of LEDs; and a current driver for the LEDs. At least one of the sets of LEDs comprises a first subset of LEDs with a first wavelength sub-range and a first set of characteristics, and a second subset of LEDs with a second wavelength sub-range and a second set of characteristics. A lumped wavelength range of the set of LEDs is a range of said first and second wavelength sub-ranges, and the set of characteristics of the set of LEDs is a function of said first and second sets of characteristics. A method for controlling the sets of LEDs is also disclosed. | 08-28-2008 |
| 20080203946 | LIGHT EMITTING APPARATUS - In conduction of light emitting diodes LEDs | 08-28-2008 |
| 20080218101 | SOFT START CONTROL CIRCUIT FOR LIGHTING - A low voltage lighting system includes a transformer having at least a primary winding and a secondary winding. The low voltage lighting system also includes one or more lighting elements and a voltage control circuit. The lighting elements are coupled to the secondary winding. The voltage control circuit is electrically coupled with the primary winding. The voltage control circuit is configured to automatically increase the voltage applied to the primary winding of the transformer in a predetermined manner from a first voltage to a second voltage over a predetermined period of time. | 09-11-2008 |
| 20080224636 | POWER CONTROL SYSTEM FOR CURRENT REGULATED LIGHT SOURCES - A light emitting diode (LED) lighting system includes a PFC and output voltage controller and a LED lighting power system. The controller advantageously operates from an auxiliary voltage less than a link voltage generated by the LED lighting power system. The common reference voltage allows all the components of lighting system to work together. A power factor correction switch and an LED drive current switch are coupled to the common reference node and have control node-to-common node, absolute voltage that allows the controller to control the conductivity of the switches. The LED lighting system can utilize feed forward control to concurrently modify power demand by the LED lighting power system and power demand of one or more LEDs. The LED lighting system can utilize a common current sense device to provide a common feedback signal to the controller representing current in at least two of the LEDs. | 09-18-2008 |
| 20080238343 | System and Method for Dimming One or More Light Source - A system for dimming one or more light sources includes a first light source that emits a light of a first brightness according to an operating condition of the first light source, a second light source that emits a light of a second brightness according to an operating current of the second light source, wherein the light of the first brightness is different than that of the light of the second brightness, and one or more components that references the operating condition of the first light source, wherein, in response to the referenced operating condition of the first light source, the one or more components modifies the operating current of the second light source to substantially match the light of the second brightness to the light of the first brightness. A method for dimming one or more light sources is also disclosed. | 10-02-2008 |
| 20080246418 | DRIVER SYSTEM AND METHOD WITH MULTI-FUNCTION PROTECTION FOR COLD-CATHODE FLUORESCENT LAMP AND EXTERNAL-ELECTRODE FLUORESCENT LAMP - System and method for driving a cold-cathode fluorescent lamp. The system includes a control subsystem configured to generate one or more control signals, and a power supply subsystem configured to receive the one or more control signals and a DC input voltage, convert the DC input voltage to an AC output voltage, and send the AC output voltage to a cold-cathode fluorescent lamp. If the DC input voltage is lower than a predetermined threshold, the system for driving the cold-cathode fluorescent lamp is turned off in response to the one or more control signals. | 10-09-2008 |
| 20080252235 | Electronic Control Gear and Method of its Use - An electronic control gear for a lamp is disclosed. The electronic control gear has a memory device and a microprocessor configured to acquire data relating to at least one parameter of operation of the lamp and configured to store acquired data in the memory device. The at least one parameter of operation is an electrical power consumption of the lamp during a period of operation, a duration of operation of the lamp during a period, a duration of operation the lamp at each of a plurality of power consumption levels or bands, or an operating temperature of a component of a circuit in which the lamp is connected. | 10-16-2008 |
| 20080258652 | Power control circuit for adjusting light - The present invention discloses a power control circuit for adjusting light, which adopts both frequency modulation and amplitude modulation for the control and starts using the amplitude modulation control after the frequency change exceeds a predetermined limit range, such that the voltage and frequency for driving the lamp set fall within a range acceptable to the lamp set and minimize the effect of frequency interferences. | 10-23-2008 |
| 20080265803 | POWER LIMITING CIRCUIT - A power limiting circuit for controlling the power of the incandescent lamp not to overrun the rated power limit includes a sampling circuit that consists of two resistors connected in parallel. A control chip compares the received sample voltage with the standard voltage then outputs control signal to drive the conduction of a SCR (silicon controlled rectifier) to change the inner states of contacts of a relay so as to further control the on/off between the input and the output. Based on this control process and technique, this invention prevents the employment of incandescent lamps having a greater power than power rating. Besides, a bi-operational amplifier circuit is used to fulfill the whole examination and control perfectly. | 10-30-2008 |
| 20080278099 | Controlling electroluminescent panels in response to cumulative utilization - An electronic device includes a light source, which generates light in response to a signal, and a controller. Because the luminosity of the light source decays over time, the controller generates a utilization value based on a cumulative time that the light source is emitting light, and regulates the signal that is provided to the light source in response to the utilization value to at least partially compensate for decay in the luminosity of the light source. | 11-13-2008 |
| 20080284355 | Method and Driving Circuit for Operating a Hid Lamp - To avoid acoustic resonance in a gas discharge lamp, a lamp current constituted of a number of frequencies is supplied to said lamp. Using a number of frequencies, the total power supplied to the lamp is distributed over said number of frequencies. Since the power per frequency is relatively low, the possibility of occurrence of an acoustic resonance is low irrespective of the characteristics of the gas discharge lamp. The current may comprise a number of frequencies by applying a number of sinusoidal currents or by using a non-sinusoidal current. | 11-20-2008 |
| 20080284356 | Remote Dimmable Energy-Saving Device for Fluorescent Lamps - A remote dimmable energy-saving device (fluorescent lamp) ( | 11-20-2008 |
| 20080297069 | Method and Circuit for Driving a Low Voltage Light Emitting Diode - In a method for producing a control signal for regulating a drive current for driving an LED, a current through the LED is sensed, wherein the LED is driven by a power converter output, and wherein an output voltage of the power converter is proportionately controlled by a control signal. Next, a power supply voltage is sensed. The control signal is produced for the power converter, wherein the control signal is proportional to a difference between a reference voltage and the current through the LED. The control signal is then offset in response to the power supply voltage to reduce the current through the LED as the power supply voltage drops. | 12-04-2008 |
| 20080303454 | Fluorescent Tube Lamp Drive Circuit - A drive circuit for driving a fluorescent tube lamp comprises a variable frequency oscillator generating a lamp drive frequency, a resonant drive circuit driving the lamp with the lamp drive frequency, and a control unit for driving the variable frequency of the latter under control of a synchronization signal. When a pre-heating frequency is generated by the variable frequency oscillator, the lamp is pre-heated while when an illumination drive frequency is generated, the lamp ignites and operates in its illuminated state. The control unit comprises a transition controller for at an ignition of the lamp limiting the drive frequency to an ultimate ignition frequency, and only enabling transition from the ultimate ignition frequency to the illumination drive frequency after an ignition delay time. | 12-11-2008 |
| 20080303455 | Method for Driving of a Fluorescent Lighting and a Ballast Stabilizer Circuit for Performing the Same - A method of driving a fluorescent light, having: (a) receiving and full-wave rectifying commercial AC power; (b) dividing phases of the AC power full-wave rectified at step (a) depending on voltage magnitude, and performing switching control such that low-voltage portions of the divided voltages, having low phases, are used as heating power for heating filaments of a fluorescent tube, and high-voltage portions of the divided voltages, having high phases, are used as discharge voltage of the fluorescent tube; (c) switching on the low-voltage portions having low phases as the heating power for heating the filaments of the fluorescent tube in response to a signal output at step (b); and (d) switching on the high-voltage portions having high phases as the lighting power of the fluorescent tube in response to the signal output at step (b). | 12-11-2008 |
| 20080309256 | INTEGRATED CIRCUIT CONTROLLER FOR BALLAST - The present invention provides an integrated circuit controller for ballast with preheat/repreheat filament and ignition time control. A charge/discharge circuit is connected to a capacitor to provide the charge/discharge path for the capacitor. It charges when integrated circuit controller without errors and discharges when error occurred during lamp operation or power tripped. A control circuit is coupled to the charge/discharge circuit to control the charge/discharge circuit to charge or discharge the capacitor. A compare circuit is coupled to the charge/discharge circuit to compare a voltage signal on the capacitor from the charge/discharge circuit with threshold voltages for timing control and providing a preheat signal and an ignition signal. A control logic circuit is coupled to the control circuit to control the control circuit and coupled to the compare circuit to receive the preheat signal and the ignition signal for preheating the filament and igniting the lamp. The control logic circuit further receives a feedback voltage for over voltage protect. Once the feedback voltage is over its threshold voltage in the control logic circuit, the control logic circuit controls the control circuit for discharging the capacitor. | 12-18-2008 |
| 20080309257 | Diode lamp for simulating a filament lamp, and lamp monitoring method - An LED-based lamp assembly or diode lamp assembly effectively replaces a filament or incandescent type lamp assembly for cabin/compartment reading light applications for reducing power consumption and improving fuel efficiency. The diode lamp assembly comprises a light-emitting diode in circuit with peripheral components for effecting or simulating a low resistance through the diode lamp assembly. The simulation of a low resistance via the diode lamp assembly appears the same as the normal operation of a filament lamp assembly to existent circuit polling mechanisms so that the latter need not be replaced. Rather, the targeted element to be replaced is a relatively high power consumption filament lamp. A lamp monitoring method is further disclosed as bootstrap-supported by the teaching of the diode lamp assembly. | 12-18-2008 |
| 20080315794 | METHOD AND FIRMWARE FOR GENERTING A DIGITAL DIMMING WAVEFORM FOR AN INVERTER - A method and firmware for method of generating a digital dimming waveform for an inverter includes steps of receiving programmable parameters as input to firmware in an inverter voltage microcontroller including a soft start duration, a restrike voltage, a restrike duration, a recovery duration, a sustaining voltage, a dimming duty cycle, and an inverter frequency; and generating by firmware in the inverter voltage microcontroller a first portion of a pulse-width modulated digital switch control signal having a frequency equal to the inverter frequency and a duty cycle that varies from a first value to a second value during a time interval equal to the soft start duration. | 12-25-2008 |
| 20080315795 | AMPLIFICATION CIRCUIT AND HEAT SINK USED WITH A LIGHT EMITTING APPARATUS HAVING VARYING VOLTAGES - A light emitting apparatus for regulating a current output of an LED at predetermined value with a power source having a wide variety of voltages and chemistries is described. A light emitting diode is electrically coupled to the voltage source. A pulse width modulation controller controls a duty cycle of the voltage applied. A resistor electrically coupled between the voltage source and the light emitting diode is used to regulate output current for the LED. An amplification circuit is electrically coupled to the resistor and the pulse width modulation controller for supplying a feedback voltage to the pulse width modulation controller that is higher than a voltage measured across the resistor. | 12-25-2008 |
| 20080315796 | Backlight modulation circuit and method thereof - A backlight modulation circuit includes an illumination controlling signal generating circuit, an illumination control signal separating circuit, and an illumination modulation circuit. The illumination controlling signal generating circuit is configured for receiving an modulation signal and generating an illumination controlling signal according to the modulation signal. The illumination control signal separating circuit is configured for separating the illumination controlling signal into a first modulation signal and a second modulation signal. The illumination modulation circuit is configured for modulating illumination of a backlight module according to the first and second modulation signals. | 12-25-2008 |
| 20090009107 | LIGHT-EMITTING DEVICE, ELECTRONIC DEVICE, AND DRIVING METHOD OF LIGHT-EMITTING DEVICE - An object is to provide a novel driving method of a light-emitting element, particularly, an organic EL element. Another object is to provide a light-emitting device having a light-emitting element for which the driving method is employed and an electronic device having the light-emitting device as a display portion. A light-emitting device is provided, which includes: a pixel portion having a light-emitting element; a control switch connected to the pixel portion; and a sensor portion connected to the control switch. The control switch includes a unit configured to determine whether the light-emitting element emits light depending on an ambient temperature that is sensed by the sensor portion. | 01-08-2009 |
| 20090015179 | BACKLIGHT CONTROL DEVICE AND DISPLAY APPARATUS - A PWM generation circuit is set so as to generate a PWM pulse signal having a frequency that is an odd number times a vertical synchronization frequency. A frequency division circuit frequency-divides the PWM pulse signal generated by the PWM generation circuit. An AND gate calculates the logical product of the PWM pulse signal generated by the PWM generation circuit and a frequency-division pulse signal outputted from the frequency division circuit. An OR gate calculates the logical sum of the PWM pulse signal generated by the PWM generation circuit and the frequency-division pulse signal outputted from the frequency division circuit. A selector outputs an output signal of the OR gate as a dimming pulse signal in a case where the set duty ratio is not less than 50%, while outputting an output signal of the AND gate as a dimming pulse signal in a case where the set duty ratio is less than 50%. Consequently, the frequency of the dimming pulse signal is five-second the frequency of a vertical synchronizing signal. | 01-15-2009 |
| 20090015180 | Discharge lamp lighting apparatus - A discharge lamp lighting apparatus includes an input power supply, a power supply circuit, a bridge circuit having switching elements Q | 01-15-2009 |
| 20090021188 | LAMP DRIVING DEVICE - In one aspect, an impedance component which exhibits a high impedance in a high frequency region is arranged on a high pressure line formed on a secondary side of a transformer. The potential difference generated at both ends of the impedance component is used to detect an abnormal electrical discharge generated in the high pressure line. When the abnormal electrical discharge is detected, a switching operation is stopped by a controlling circuit whereby a protection operation is performed. | 01-22-2009 |
| 20090039800 | AC POWER SUPPLY SYSTEM FOR BALANCED ENERGIZATION OF A PLURALITY OF LOADS - A gas-discharge lamp igniter is disclosed which has a group of gas-discharge lamps, such as those for LCD backlighting, connected in parallel with one another between the pair of outputs of an AC power supply. Provided one for each lamp to be energized, current-balancing transformers have their secondary windings serially interconnected. The lamps are connected to one of the pair of outputs of the AC power supply via the respective primary windings of the current-balancing transformers and the serial connection of the secondary windings thereof. | 02-12-2009 |
| 20090039801 | Backlight control circuit - An exemplary backlight control circuit for changing a brightness of a light source includes a coarse adjusting circuit and a fine adjusting circuit. The coarse adjusting circuit is configured to coarsely adjust a DC voltage according to one received coarse adjusting signal. The fine adjusting circuit is configured to finely adjust the DC voltage according to one received fine adjusting signal. A change of the DC voltage generated by the coarse adjusting circuit is greater than another change of the DC voltage generated by the fine adjusting circuit. | 02-12-2009 |
| 20090039802 | Backlight control circuit - An exemplary backlight control circuit includes a pulse width modulation integrated circuit (PWM IC) having a power input terminal, a power source capable of outputting an operation voltage, and a switching circuit connected between the power source and the PWM IC to control if the operation voltage is provided to the power input terminal. | 02-12-2009 |
| 20090045758 | Drive Circuit Supplying Current to Load Based on Control Signal, and Portable Information Terminal Including the Same - A drive circuit ( | 02-19-2009 |
| 20090045759 | BACKLIGHT UNIT, DISPLAY APPARATUS COMPRISING THE SAME AND CONTROL METHOD THEREOF - Provided is a display apparatus including: a display panel; a light source which includes a plurality of light source modules and supplies light to the display panel; a light source driver which drives the light source modules; a power source which supplies power to the light source driver; a current detector which detects a current of the power supplied from the power source to the light source driver; and a controller which controls the light source driver to sequentially drive the plurality of light source modules and compares the detected current with a range to detect errors from the respective light source modules. | 02-19-2009 |
| 20090051300 | METHOD AND DRIVING UNIT FOR DRIVING A GAS DISCHARGE LAMP - This invention describes a method for driving a gas discharge lamp ( | 02-26-2009 |
| 20090058323 | Flyback LED drive circuit with constant current regulation - A flyback LED drive circuit for the plurality of LEDs is provided. An inductive device is coupled to an input voltage. A power transistor is connected to the inductive device in series to control the switching current of the inductive device. The energy is stored into the inductive device when the power transistor is turned on. The stored energy is delivered to the plurality of LEDs via a flyback diode when the power transistor is turned off. A control circuit is utilized to detect the switching current of the inductive device for generating a switching signal to provide a constant current to the plurality of LEDs. | 03-05-2009 |
| 20090058324 | PRECHARGE CONTROLLING METHOD AND DISPLAY DEVICE USING THE SAME - An embodiment of the invention provides a precharge controlling method, including the steps of: providing a voltage generating circuit with an output circuit for outputting a voltage having a necessary level, and a comparator; judging an output voltage from the output circuit in the comparator during a precharge time period, and feeding back an output signal from the comparator to the output circuit; and controlling a precharge voltage until the voltage having the necessary level outputted from the output circuit is reached. | 03-05-2009 |
| 20090066265 | INVERTER - A soft start circuit generates a soft start voltage Vss which changes with time at a starting time of lighting an EEFL. A pulse width modulator generates a PWM signal Vpwm whose duty ratio is feedback-controlled so that a feedback voltage Vfb corresponding to an output voltage Vdrv of an inverter conforms to the soft start voltage Vss. A logical control unit performs switching control of a voltage of a primary coil of a transformer on the basis of the PWM signal Vpwm from the pulse width modulator. The soft start circuit executes at least one striking operation in which the soft start voltage Vss is raised with time, lowered when being reached to a first voltage level VH, and raised again when being lowered to a second voltage level VL lower than the first voltage level VH. | 03-12-2009 |
| 20090066266 | INTEGRATED POWER AND CONTROL UNIT FOR A SOLID-STATE LIGHTING DEVICE - The present invention provides an integrated power and control unit for use with a solid-state lighting device. The integrated power and control unit comprises a power input and a data input. The power input receives power from a power source, wherein this power is configured in a first power format and the data input receives control data from a control data source, wherein the control data is configured in a first data format. The integrated power and control unit further comprises a translation device coupled to the power input and the data input. The translation device is configured to convert the power in the first power format to power in a second power format and further configured to convert the control data in the first data format to control data in a second data format. The second power format and second data format are compatible with the required power and data formats of the solid-state lighting device and transmit the required power and data formats of the solid-state lighting device using a power and data output. | 03-12-2009 |
| 20090072762 | Backlight control circuit and method for driving same - An exemplary backlight control circuit includes a transformer, a control circuit, a lamp. The control circuit and the transformer form an inverter circuit to providing an alternating current (AC) voltage for driving the lamp. When the backlight control circuit works in a startup mode, the backlight control circuit defines a first current path including the lamp and the first current path forms a first resonant circuit. When the backlight control circuit works in an operation mode, the backlight control circuit defines a second current path including the lamp and the second current path forms a second resonant circuit. The first and second resonant circuits have different resonant frequencies from each other. | 03-19-2009 |
| 20090079365 | CONTROL METHOD AND BALLAST FOR RUN-UP OF METAL HALIDE LAMP - A method of controlling run-up of a metal halide lamp that has a nominal (full) light output during steady state operation and that has a current limit I | 03-26-2009 |
| 20090079366 | FAST RUN-UP OF METAL HALIDE LAMP BY POWER MODULATION AT ACOUSTIC RESONANCE FREQUENCY - A method of controlling run-up of a metal halide lamp that has a nominal (full) light output during steady state operation and that has a current limit I | 03-26-2009 |
| 20090079367 | Software Controlled Electronic Dimming Ballast - A software controlled electronic dimming ballast for preheating, striking, and varying the dimming level of a lamp. In one embodiment, the ballast includes an EMI filter circuit, an AC/DC converter circuit, a PFC circuit, an inverter circuit, and a software controlled microcontroller circuit. The microcontroller circuit includes a microcontroller and software for generating inverter control signals that cause the inverter circuit to preheat, strike, and varying the dimming level of the lamp. The inverter control signals are generated based on dimming control and lamp dimming level feedback signals. The ballast also includes a lamp dimming level feedback signal conditioning circuit for generating the lamp dimming level feedback signals. Alternative embodiments of the ballast are also described. | 03-26-2009 |
| 20090085501 | CONSTANT CURRENT DRIVER CIRCUIT WITH VOLTAGE COMPENSATED CURRENT SENSE MIRROR - A current sensing circuit for sensing the current provided to LEDs by a constant current power source includes a resistive shunt in series with the load and a current mirror having a first leg connected to a first terminal of the resistive shunt and a second leg connected to a second terminal of the resistive shunt. Both legs of the current mirror are also connected to ground. The first leg provides a reference signal to the second leg, and the second log uses the reference signal and a voltage at the second terminal of the resistive shunt to provide a ground referenced output signal indicative of the current provided to the LEDs. | 04-02-2009 |
| 20090091272 | PROJECTION-TYPE IMAGE DISPLAY APPARATUS, LIGHTING APPARATUS AND LIGHTING METHOD REALIZING AN EXTENDED LIFETIME - A projection-type image display apparatus includes a high pressure discharge lamp, which utilizes the halogen cycle, and a lamp lighting apparatus that controls lighting of the high pressure discharge lamp. The lamp lighting apparatus performs lamp refresh processing to improve a lamp property. The lamp refresh processing involves performing low power lighting of the high pressure discharge lamp by changing the lighting power of the high pressure discharge lamp to a value that is lower than the rated power, and thereafter performing high power lighting of the high pressure discharge lamp by changing the lighting power to a value that is higher than the lighting power during the low power lighting. | 04-09-2009 |
| 20090096389 | DC/DC CONVERTER - A control circuit of a DC/DC converter is provided for supplying a driving voltage to a light emitting element. A hysteresis comparator compares a detection voltage that corresponds to the output voltage of the DC/DC converter with two threshold voltages. If the detection voltage is smaller than the lower threshold voltage, the hysteresis comparator outputs a comparison signal at the low level. Otherwise, the comparison signal is set to the high level. The switching control unit uses the comparison signal as a reference. The switching control unit instructs the switching transistor of the DC/DC converter to perform the switching operation during a period when the comparison signal is at the low level. Otherwise, the switching operation is suspended. The control circuit inhibits light emission of the light emitting element during a period when the comparison signal is at the low level. Otherwise, the control circuit permits the light emission. | 04-16-2009 |
| 20090096390 | Electronic Ballast and Method for Operating an Electrical Lamp - An electronic ballast for an electrical lamp ( | 04-16-2009 |
| 20090096391 | Control of Delivery of Current Through One or More Discharge Lamps - Control of delivery of current through one or more discharge lamps. Methods include alternately switching on and off switching elements that control a fluorescent lamp, in response to receiving input, until the brightness of the lamp decreases to a threshold. Further, methods include providing control signals at complementary duty cycles to further decrease the brightness and alternating the duty cycles of the signals applied to the filaments of the fluorescent lamp. Methods also include identify parameter sets stored in memory to operate fluorescent lamps. | 04-16-2009 |
| 20090102399 | Backlight led drive circuit - A backlight LED drive circuit | 04-23-2009 |
| 20090108776 | CIRCUIT FOR PROVIDING AN APPROXIMATELY CONSTANT RESISTANCE AND/OR CURRENT AND METHOD THEREFOR - A circuit can provide an approximately constant resistance value that is virtually independent of process and temperature variations. A current control circuit may use a device that tracks the changes in a corresponding device over process and temperature variations. As a result, the behavior of device may be used to help determine the control information provided to device in order to maintain an approximately constant resistance Rm over process and temperature variations. The approximately constant resistance Rm may be used to provide an approximately constant current I | 04-30-2009 |
| 20090108777 | Devices and systems that deliver nitric oxide - The present disclosure relates to dressings, such as patches and bandages, and other devices and systems that deliver nitric oxide. | 04-30-2009 |
| 20090121653 | Constant Current Circuit, Light Emitting Apparatus and Power Supply Apparatus Using That Constant Current Circuit - In a constant current circuit that supplies a constant current Ic to a circuit connected to a current output terminal, the first transistor M | 05-14-2009 |
| 20090121654 | LED Light Output Linearization - A system and method for producing a flattened characteristic for LED luminous output. The system may include an array containing one or more light emitted diodes, a power source connected to the LED array providing drive current to the LED array, a timer connected to a controller wherein the timer logs the on-time of the LED array and communicates the LED array on-time to the controller, and a controller connected to the power source wherein the controller adjusts the intensity of the drive current provided to the LED array based on the on-time data received from the timer such that the resultant relative luminous output is approximately equal to the initial relative luminous output. | 05-14-2009 |
| 20090121655 | Terminal device and computer-readable storage medium - A terminal apparatus and a computer-readable storage medium capable of achieving reduction of power consumption by appropriately controlling lighting of a display unit are provided. | 05-14-2009 |
| 20090128057 | FLUORESCENT LAMP AND BALLAST WITH BALANCED ENERGY RECOVERY PUMP - A fluorescent lamp formed of a power control unit and a fluorescent lamp assembly. The lamp assembly includes a fluorescent tube having filaments and including inductive and capacitive components connect to the filaments forming a resonant network. The power control unit includes an input power unit, an energy recovery pump, a bulk capacitor and a lamp driver including a half-bridge power stage and a half-bridge driver. The input power unit provides an input voltage, includes a lamp driver for switching a high DC voltage with a high switching frequency to provide a high-frequency driving voltage for driving the resonant network. The energy recovery pump is balanced so as not to disturb the resonance of the network and so as to enable recovery and transfer of energy to the bulk capacitor and thereby establish a high luminous efficiency for the fluorescent lamp. | 05-21-2009 |
| 20090128058 | Overload Protection Circuit - A current shut-off overload protection circuit useful for fluorescent lamp ballast protection and the like has at least one power transistor for supplying a load current to a circuit load, a protection circuit comprising a current sensing resistance connected for developing a voltage drop related to the circuit load, and a switching diode having a control input operative for turning off the power transistor by removing a bias level, as by grounding the transistor base, responsive to a preset level of the voltage drop such that the load current to the load is switched off upon the load current exceeding a maximum acceptable load current represented by a preset level of the voltage drop. | 05-21-2009 |
| 20090134816 | Self adjusting power supply apparatus and method - Apparatus and methods are disclosed that control power supplies to automatically provide the appropriate voltage to drive constant current devices. A lighting system according to the present invention comprises a lighting module having a constant current device that provides a constant current in response to constant current voltage. A power supply is included that generates a power supply voltage coupled to the lighting module. A feedback circuit is included from the lighting module to the power supply causing the power supply voltage to be sufficient to provide a constant current voltage at the LED module. A method according to the present invention for generating a constant current voltage to drive a constant current device, comprises providing a drive voltage to a constant current device. The current at the constant current device is sensed a first time, and the drive voltage is increased. The current to the constant current device is sensed a second time. The drive current is held at its increased level if the current did not increase from the first to the second sensing. The increasing of the drive voltage and sensing of the current is repeated of the current did increase between the first and second sensing. | 05-28-2009 |
| 20090134817 | Method and Apparatus for Controlling Current Supplied to Electronic Devices - The present invention provides a drive and control apparatus provides a desired switched current to a load including a string of one or more electronic devices. A voltage conversion means, based on an input control signal converts the magnitude of the voltage from the power supply to another magnitude that is desired at the high side of the load. A dimming control means provides control for activation and deactivation of the load and may further provide a means for current limiting. A feedback means is coupled to the voltage conversion means and a current sensing means and provides a control signal to the voltage conversion means that is indicative of voltage drop across the current sensing means which represents the current flowing through the load. Based on the control signal received, the voltage conversion means can subsequently adjust its output voltage such that a constant switched current is provided to the load. | 05-28-2009 |
| 20090134818 | UNIVERSAL INPUT VOLTAGE DEVICE - A universal input voltage device is presented which may receive a wide range of regulated and unregulated input voltages, both DC and a wide range of variable frequency AC, and output a desired regulated current at a desired voltage independent of the fluctuation of input voltage and frequency. The circuit includes a preconditioning input circuit, a Buck converter circuit with over voltage protection, flyback and boost circuits, and a shutdown circuit configured to drive a predetermined electrical or electronic device. | 05-28-2009 |
| 20090160366 | Method for Setting an Electronic Ballast - Method for setting an electronic ballast, with which an electric lamp is operated which comprises programming first settings of at least one operational parameter of at least one first lamp type into the electronic ballast, setting and operating an electric lamp, which is connected to the electronic ballast, with the programmed first settings as long as a normal operating mode of the electronic ballast is set, changing the first settings of the operational parameters during a secondary operating mode of the electronic ballast, the secondary operating mode of the electronic ballast being set when the electronic ballast identifies a value for the resistance of a lamp filament and/or a substitute load of the electric lamp connected to the electronic ballast which is untypical in comparison with the normal operating mode, the change to the first settings being carried out depending on the identified untypical value for the corresponding resistance. | 06-25-2009 |
| 20090160367 | POWER SUPPLY, LIGHT EMISSION CONTROL DEVICE AND DISPLAY DEVICE - The power supply of the present invention is composed of: a charge pump circuit ( | 06-25-2009 |
| 20090160368 | Phase Control for Hysteretic Controller - A driver circuit, and light emitting system and method are provided. The driver circuit includes possibly a controller and a phase detector coupled to produce an intermittent output proportional to a value of an input relative to upper and lower threshold values, and a difference between the input signal, which is the intermittent output signal, and a reference value. The light emitting system can include a switch and at least one light emitting device coupled to the switch. The driver circuit can be coupled to forward the intermittent output signal to the switch that is active in proportion to current level through the light emitting device, rising and falling between the modifiable upper and lower threshold values. | 06-25-2009 |
| 20090160369 | CONTROLLING A LIGHT EMITTING DIODE FIXTURE - One embodiment in accordance with the invention can include a circuit for controlling a light emitting diode (LED) lighting fixture via a power line. The circuit can include a power switch coupled to the power line and is for outputting a firing angle. Additionally, the circuit can include a control circuit coupled to the power switch and is for implementing firing angle control of the power switch. Furthermore, the circuit can include a translator coupled to receive the firing angle and for mapping the firing angle to a function of the LED lighting fixture. | 06-25-2009 |
| 20090167209 | Circuit arrangement and method for operating at least one electric lamp - A circuit arrangement for operating at least one electric lamp having an inverter has at least one first and one second bridge transistor arranged in series with one another, a first drive circuit for the first bridge transistor; a second drive circuit for the second bridge transistor; the and second drive circuits being designed to drive the first and second bridge transistors to switch alternately completely on and off during normal lamp operation; and at least one protective apparatus; the at least one protective apparatus being designed, in the case of a value for a reference voltage, which is correlated with the voltage across the bridge transistor which has just been switched off, above a predeterminable limit value, to drive the bridge transistor, which has just been completely switched on, such that it is no longer completely switched on. A related method is also described. | 07-02-2009 |
| 20090167210 | Current shaping of an LED signal for interfacing with traffic control equipment - A system creates a desired current level within a traffic signal. A power supply unit receives an external power signal and transforms the power signal to a lamp current. A pulse generator monitors the value of the lamp current and automatically adjust the power usage of the current sink circuit to maintained a predefined current amplitude. A current pulser generates square current pulses at a frequency based at least in part on the frequency of the lamp current. A current sink superimposes the rectangular current pulse onto the lamp current and outputs a combined power signal to the alternating current power line. | 07-02-2009 |
| 20090167211 | METHOD OF DRIVING A DISCHARGE LAMP, AND DRIVING UNIT - The invention describes a method of driving a discharge lamp ( | 07-02-2009 |
| 20090179591 | UNI-DIRECTIONAL LIGHT EMITTING DIODE DRIVE CIRCUIT IN PULSED POWER PARALLEL RESONANCE - The present invention uses the capacitive, inductive, or resistive impedance component to constitute the first impedance, and uses the inductive impedance component and capacitive impedance component which produce parallel resonance after parallel connection to constitute the second impedance, whereby the first impedance and the second impedance are series connected for inputting pulsed DC power, and the divided power thereof is rectified to drive the uni-directional light emitting diode. | 07-16-2009 |
| 20090179592 | UNI-DIRECTIONAL LIGHT EMITTING DIODE DRIVE CIRCUIT IN PULSED POWER NON-RESONANCE - The present invention uses the capacitive, inductive, or resistive impedance component to constitute the first impedance, and uses the inductive impedance component and capacitive impedance component which will not produce parallel resonance after parallel connection to constitute the second impedance, whereby the first impedance and the second impedance are series connected for inputting pulsed DC power, and the divided power generated at the two ends of the first or second impedance is rectified to drive the uni-directional light emitting diode. | 07-16-2009 |
| 20090184670 | WAVEFORM MANAGEMENT SYSTEMS AND METHODS FOR BALLASTS - Waveform management systems and methods for ballasts are provided. The system includes a lamp, a ballast, a first interface, a storage unit, and a processing unit. The processing unit obtains at least one first waveform from the storage unit, and writes the first waveform to the ballast via the first interface. The processing unit transmits an illumination signal to the ballast via the first interface, such that the ballast controls the illumination of the lamp according to the first waveform. | 07-23-2009 |
| 20090189545 | ELECTRONIC BALLAST WITH TRANSFORMER INTERFACE - An electronic ballast with transformer interface communicating between an external control system and the electronic ballast comprises an outboard circuit ( | 07-30-2009 |
| 20090189546 | LED DIMMING CONTROL CIRCUIT - A LED dimming control circuit that avoids a higher output voltage than expected is provided. The LED dimming control circuit comprises an inductor, a transistor, a dimming control signal, a feedback signal, a switching control circuit, an error amplifier, and an inverted amplifier. The inductor and the transistor are coupled to a node. The switching control circuit is controlled by the dimming control signal and the feedback signal. The transistor is controlled by the switching control circuit. The output terminal of the error amplifier and the non-inverted input terminal of the error amplifier form a negative feedback path via the inverted amplifier. | 07-30-2009 |
| 20090189547 | Lighting Device and Method of Control Based on Chemistry Composition of Power Source - A lighting device is generally illustrated having a light body having forward facing light sources including a visible white light source, visible colored light source and an infrared light source. Additionally, a side facing light source is provided. The light body also includes switches for activating the visible light sources and a three-position switch for activating the IR light source and the side facing light source. The light source of the lighting device may further be controlled based on a detected chemistry composition of the power source. | 07-30-2009 |
| 20090189548 | Lighting Device Having Boost Circuitry - A lighting device is generally illustrated including a light body having forward facing light sources including a visible white light source, visible colored light source and an infrared light source. Additionally, a side facing light source is provided. The light body also includes switches for activating the visible light sources and a three-position switch for activating the IR light source and the side facing light source. The lighting device further includes boost circuitry for controlling electrical energy supplied to a light source. | 07-30-2009 |
| 20090195191 | Perceptually linear LED brightness control - A current regulator includes a first current source to provide a reference current varying with a dimming step, and a second current source to generate a drive current for a white LED according to the reference current. The reference current and the dimming step have a relationship identical to or approximating a relationship between luminance and lightness perceived by human eyes. Thus, the white LED is controlled to have a linear variation of the luminance perceived by human eyes when the dimming step is changed. | 08-06-2009 |
| 20090195192 | SMART LIGHT - An intelligent light, such as a light for connecting with and receiving communications from a low voltage line, is provided. The intelligent light includes a power supply operable to generate a DC voltage from an input voltage communicated via a low voltage line by a power source, a receiver operable to extract a data pattern encoded in the input voltage; and output circuitry in communication with the DC voltage and the receiver operable to generate an output voltage to energize a light based on the data pattern to control operations of the light. | 08-06-2009 |
| 20090200964 | Methods And Apparatus For Dimmable Ballasts With A High Power Factor - Methods and apparatus for powering dimmable ballast circuits are disclosed. In the described examples, a dimmable ballast circuit includes a rectifier, an energy storage device, a driver circuit, and a resonant circuit that are configured to actuate the light source such as a fluorescent lamp. Specifically, energy storage device is a capacitor that stores a high frequency energy and continually recycles energy in the circuit, resulting in a circuit with a large power factor. Further, because the current flowing into the resonant circuit is substantially sinusoidal, the circuit generally has an ideal crest factor, thereby increasing the lifespan of the light source. | 08-13-2009 |
| 20090200965 | ENERGY SAVINGS CIRCUITRY FOR A LIGHTING BALLAST - Methods and apparatus for saving energy in a ballast comprising a tank circuit for a gas-discharge lamp are disclosed. A feedback circuit and a filament shutoff circuit cooperate to detect energy in the tank ballast and save energy during operation. The feedback circuit detects current flowing in the tank circuit of a ballast and can signal to shut off a voltage regulator in the ballast, and/or signal to a filament shut off circuit to reduce energy consumed by the filaments in the bulb after ionization has occurred. A time delay ensures that the signal voltage generated does not immediately deactivate the voltage regulator and/or the filament shutoff circuit when powering the ballast, but only does so after ionization has occurred. In this manner, energy consumption is reduced after ionization of the bulbs has occurred. | 08-13-2009 |
| 20090206774 | Electronic reactive current oscillation-reducing ballast - The invention relates to an electronic ballast presenting an input capacitor and comprising and step-up chopper for operating a load, for example a discharge lamp, on a phase control dimmer having an integrated or parasite inductance. In such a way, the voltage overshooting on the input capacitor are reduced by active charge or discharge thereof. | 08-20-2009 |
| 20090206775 | Constant Lumen Output Control System - A constant lumen output control system for providing a constant lumen output throughout the life of a lamp at the mean or preset lumen level. The lumen con system ( | 08-20-2009 |
| 20090206776 | LED DRIVE CIRCUIT AND LED ILLUMINATION DEVICE USING SAME - An LED drive circuit includes a resistor for setting a constant current, a switching power supply circuit for outputting a DC output voltage and a constant-current power supply circuit that receives the DC output voltage and that outputs the constant current to drive the LED. The LED drive circuit reduces, in dim light mode in which the LED is driven by a current less than that in normal light mode, at least one of the oscillation frequencies of an oscillation circuit included in the switching power supply circuit and an oscillation circuit included in the constant-current power supply circuit as compared with the normal light mode. | 08-20-2009 |
| 20090212720 | LIGHT EMITTING DIODE DRIVING SYSTEM - An exemplary light emitting diode driving system includes a protective circuit, a rectifying circuit, a driving circuit, a light emitting diode module and a detecting circuit. The protective circuit, the rectifying circuit, the driving circuit and the light emitting diode module are connected in series. The driving circuit is configured for driving the light emitting diode to emit light. The detecting circuit has predetermined voltages or current values stored therein. The detecting circuit detects the respective voltage or current of the protective circuit, the rectifying circuit and the driving circuit, and compares the respective voltage or current with the predetermined voltages or currents. | 08-27-2009 |
| 20090212721 | LED DRIVE CIRCUIT - An LED drive circuit includes a constant-current circuit that supplies a constant-current to an LED module to drive it; a thyristor; and a phase-angle control circuit which adjusts the ignition angle of the thyristor. The LED module, the constant-current circuit, and the thyristor are connected in series. | 08-27-2009 |
| 20090218961 | POWER SENSING IN A FLASHLIGHT - A flashlight includes a battery and a circuit for operation to signal to a user that the battery voltage is at selected voltage or power level. There can be two switches each being for operating a light emitting source of the flashlight. The switches are linked 3-way switches and have momentary-on functionality. An enlarged head is located above the barrel and there is the intermediate portion between the head and the barrel. The intermediate portion receives part of the first switch. The second switch is located in part of the tail cap of the flashlight. | 09-03-2009 |
| 20090230887 | ELECTRONIC BALLAST FOR A GAS DISCHARGE LAMP WITH CONTROLLED FILAMENT HEATING DURING DIMMING - An electronic ballast has control circuitry to operate a gas discharge lamp in both full and dimmed illumination modes. A dimming controller serves as the mechanism to permit a selection between full and dimmed illumination modes. The dimming controller signal has a dimming request range which describes the range of dimming controller signal magnitudes. The electronic ballast also includes a full power circuit having a power control coupled to the dimming controller output to receive the dimming controller signal. The full power circuit also has a full power output that can couple to the lamp. When the full power circuit receives the dimming controller signal, via the power control, and the dimming controller signal is not in the dimming request range (i.e. the full illumination mode has been selected), the full power circuit generates a full power signal capable of driving/operating the lamp(s) in the full illumination mode. A filament heating circuit has a heating input coupled to the reduced power circuit, to receive the reduced power signal, and a heating output that can couple to the filaments of one or more lamps. When the reduced power signal is present, the filament heating circuit generates and provides a filament heating signal to the filaments, via the heating output. The filament heating signal maintains the temperature of the filaments when the lamp(s) are operated in the dimmed illumination mode. Further, the filament heating signal is responsive to the reduced power signal. | 09-17-2009 |
| 20090230888 | DISCHARGE LAMP OPERATION DEVICE - To improve the startability of a discharge lamp by achieving a smooth transition from a glow discharge to an arc discharge. A discharge lamp lighting device comprises: a direct-current power supply | 09-17-2009 |
| 20090230889 | VOLTAGE SENSING APPARATUS FOR POWER REGULATION AND OVER-VOLTAGE PROTECTION OF DISCHARGE LAMP AND METHOD THEREOF - The configurations of a discharge lamp system and a controlling method thereof are provided in the present invention. The proposed discharge lamp system includes a discharge lamp, a converter circuit coupled to the discharge lamp and having a switching switch, a ballast controller generating a first driving signal and controlling the switching switch accordingly, and a voltage sensing apparatus receiving the first driving signal and generating a sensed voltage accordingly, wherein the discharge lamp is switched among a plurality of operating modes according to the sensed voltage. | 09-17-2009 |
| 20090230890 | ORGANIC ELECTROLUMINESCENT DISPLAY DEVICE AND METHOD OF PRODUCING THE SAME - An organic electroluminescent display device in which a plurality of light-emitting cells each having an organic electroluminescent portion are arranged on a substrate, wherein a plurality of organic electroluminescent portions included in the plurality of light-emitting cells include at least three organic electroluminescent portions which emit different colors, each of the light-emitting cells has a driving transistor which drives the organic electroluminescent portion included in the light-emitting cell, and an amount of an output current of the driving transistor under same driving conditions is different depending on emission color of the organic electroluminescent portion included in the light-emitting cell including the driving transistor. | 09-17-2009 |
| 20090237009 | DISCHARGE LAMP LIGHTING DEVICE, CONTROL METHOD THEREOF, AND PROJECTOR - A discharge lamp lighting device includes: a power control circuit outputting DC current; an AC conversion circuit generating and outputting discharge lamp driving AC current by inverting the polarity of the DC current at a predetermined timing; a control circuit performing an AC conversion control process of controlling a polarity inversion timing of the discharge lamp driving AC current on the AC conversion circuit and performing an interval current control process of controlling a current value of the DC current every polarity inversion timing interval on the power control circuit; a detection unit detecting a discharge lamp driving voltage at the time of normal lighting; a history information storage periodically storing history information of the detected discharge lamp driving voltage, a statistics processing unit statistically processing the stored history information every predetermined period; and a statistical information storage storing information having been subjected to the statistical process as statistical information. Here, the control circuit sets and controls at least one of a frequency, a duty ratio, and a waveform of the discharge lamp driving AC current on the basis of a time-dependent tendency of the statistical information. | 09-24-2009 |
| 20090243515 | MOTION ADAPTIVE AMBIENT LIGHTING - A method for controlling an ambient lighting element including receiving a content signal, analyzing the content signal to determine a motion vector of an object ( | 10-01-2009 |
| 20090243516 | LIGHT EMITTING APPARATUS - A light emitting apparatus includes a clock generating circuit and a light-emitting module. The clock generating circuit is for generating a clock control signal. The light emitting module includes a current supplying unit and a light emitting unit. The current supplying unit is for controlling a driving current flowing through a path, and includes a driving current source and a switch unit, which are both positioned in the path. The driving current source is for providing the driving current. The switch unit is coupled to the driving current source and the clock generating circuit, and refers to the clock control signal to open or short for controlling whether the driving current flows through the path. The light emitting unit is positioned in the path and coupled to the current supplying unit, and is for providing a light source according to the driving current. | 10-01-2009 |
| 20090256497 | BACKLIGHT DEVICE - A backlight device that is not affected by offset voltage. Driving transistor | 10-15-2009 |
| 20090256498 | FILAMENT POWER SUPPLY CIRCUIT FOR VACUUM FLUORESCENT DISPLAY - In a filament power supply circuit of a vacuum fluorescent display, an integration circuit is connected to a signal input terminal which receives a pulse signal having a magnitude corresponding to a DC power supply voltage. A comparison circuit compares an output voltage from the integration circuit with a reference voltage, and outputs a result. A first filament cathode connection terminal is connected to one terminal of the filament cathode of a vacuum fluorescent display and applies the DC power supply voltage to the one terminal. A second filament cathode connection terminal is connected to the other terminal of the filament cathode to ground the other terminal via a capacitive element. A three-terminal element includes first, second, and third terminals. The first terminal is connected to the first filament cathode connection terminal. The second terminal is grounded. The third terminal receives the output from the comparison circuit so that the path between the first terminal and the second terminal is switched in accordance with it. | 10-15-2009 |
| 20090256499 | POWER SUPPLY, DISPLAY DEVICE, AND LIGHT SOURCE DRIVING APPARATUS - A power supply is provided, which includes a DC-DC converter being supplied with an external DC input voltage and a first switching control signal and outputting a duty sensing signal of which a magnitude is varied in accordance with the first switching control signal, the duty sensing signal being indicative of a duty ratio of the first switching control signal, and the DC-DC converter converting the input voltage into a DC output voltage of a predetermined magnitude based on the first switching control signal; and a feedback controlling unit comparing the duty sensing signal with a first reference signal to adjust the duty ratio of the first switching control signal. | 10-15-2009 |
| 20090261756 | METHOD OF SHUTTING DOWN A HIGH PRESSURE DISCHARGE LAMP AND DRIVING UNIT FOR DRIVING A HIGH PRESSURE DISCHARGE LAMP - The invention describes a method of shutting down a high pressure discharge lamp ( | 10-22-2009 |
| 20090261757 | Backlight driving circuit and driving method thereof - A backlight driving circuit includes a driving unit, a light source, a power supply circuit, and a controller connected to the driving unit. The power supply circuit includes a low voltage output terminal for outputting a low DC voltage and a high voltage output terminal for outputting a high DC voltage. If the backlight driving circuit is in a normal operation mode, the driving unit transforms the high DC voltage to a constant current for driving the light source by control of the controller. If the backlight driving circuit is in a power saving operation mode, the low DC voltage drives the light source by control of the controller. | 10-22-2009 |
| 20090261758 | LIGHT SOURCE DRIVING DEVICE - A light source driving device drives a plurality of light sources. A Power Factor Circuit (PFC) circuit converts a received electrical signal to a DC signal and output to a DC/AC converting circuit. The DC/AC converting circuit converts the DC signal to another AC signal, which is isolated by the transformer circuit. A resonance balancing circuit converts the AC signal output from the transformer circuit to another AC signal to drive the light source module. A PWM dimming controller outputs a control signal to control output of the DC/AC converting circuit according to a received dimming signal, wherein duty cycle of the control signal is fixed. A voltage dividing circuit adjustably divides voltage of the DC signal output from the PFC circuit. A PFC controller feeds the divided signal back to the PFC circuit to control the DC signal output from the PFC circuit. | 10-22-2009 |
| 20090261759 | DEVICE AND PROCESS FOR UNIFORMLY LIGHTING AN OPERATING AREA - A device and a process are provided for uniformly lighting an operating area for performing the lighting of an operating area ( | 10-22-2009 |
| 20090267541 | LED LAMP CONTROL CIRCUIT HAVING POWER SAVING FUNCTION AND POWER SAVING CONTROL METHOD THEREOF - A light emitting diode (LED) lamp control circuit having power saving function includes a control switch, a LED lamp, a battery, and a controller. The battery is connected to the LED lamp to supply power via the control switch. The controller is connected to the control switch and the battery to detect voltage values of the battery and control the control switch. The controller outputs different control signals to control the switching time of the control switch to drive the LED lamp to emit light at different intensity according to the voltage value of the battery. | 10-29-2009 |
| 20090273304 | APPARATUS AND METHOD FOR TRIMMING AN OUTPUT PARAMETER OF AN ELECTRONIC BALLAST - An electronic ballast includes a microprocessor which is programmed to read an external voltage value, output a signal which controls an amount of power outputted by the electronic ballast, and adjust the signal based upon a difference between the external voltage value and an internal reference value. | 11-05-2009 |
| 20090284180 | DRIVING CIRCUIT FOR LIGHT EMITTING DEVICE WITH COMPENSATION MECHANISM AND DRIVING METHOD THEREOF - A light emitting device driving circuit, includes: a switch device, a comparator, a driving module, a time counting circuit and a compensation module. The switch device is turned on or off according to a control signal for controlling a driving current flowing through the light emitting device. The comparator generates a comparison result according to a reference voltage and a feedback voltage corresponding to the driving current. The driving module generates the control signal according to the comparison result. The time counting circuit controls the driving module to turn on the switch device after the switch device turns off for a predetermined time. The compensation module detects a turn on time for the switch device and a delay time between the feedback voltage reaching the reference voltage value and the control signal varying correspondingly, and adjusts the reference voltage according to the turn on time and the delay time. | 11-19-2009 |
| 20090284181 | BACKLIGHT UNIT ASSEMBLY, DISPLAY DEVICE HAVING THE SAME, AND METHOD OF DIMMING THE DISPLAY DEVICE - A backlight unit assembly includes a surface light source with a plurality of first electrode lines extending in a first direction, a plurality of second electrode lines and a plurality of discharge blocks defined in regions where the first and second electrode lines cross each other, respectively; a memory stores discharge/non-discharge data; a luminance calculator calculates luminances of a selected region based on an image signal; and a dimming controller outputs dimming control signals corresponding to the calculated luminances by using the discharge/non-discharge data stored in the memory. A first driving signal is transmitted to one of the first electrode lines, a second driving signal having a different waveform from the first driving signal is transmitted to another of the first electrode lines adjacent the above first electrode line, and a driving voltage is applied to one of the second electrodes lines that crosses the above two first electrode lines. | 11-19-2009 |
| 20090284182 | Method For Dimming Non-Linear Loads Using An AC Phase Control Scheme And A Universal Dimmer Using The Method - A universal dimmer for adjusting the output from linear and non-linear loads using an AC power control method incorporating phase angle control is disclosed which has a switching element, a load current measurement element for measuring the current passing through the load, a current evaluator for evaluating the current passing through the load, and a firing angle adjuster such as a regulator or transforming element. The current passing through the load is measured and evaluated so as to direct the firing angle adjuster to adapt firing angles of the switching element in such way that a load RMS current is proportional to an input signal to the dimmer, regardless of the type of load being controlled. The universal dimmer is capable of dimming the output from linear and non-linear loads using a variable power delivery method using AC power line phase angle control to vary output power of linear and non-linear loads, ranging from regular linear loads such as incandescent lamps, to non-linear loads, such as LED lamps, compact fluorescent lights (CFLs'), etc. as well as linear loads with large phase shift, that is, inductive and capacitive loads. | 11-19-2009 |
| 20090289580 | BACKLIGHT ADJUSTMENT SYSTEM - A preferred embodiment relates to controlling the amount of backlight in an electronic display to account for the temperature in the backlight cavity. Another embodiment relates to a system for controlling the amount of backlight based on both the temperature in the backlight cavity and the amount of ambient light. The embodiments are especially useful in electronic displays which are subjected to cold or warm temperatures and displays which are placed in very bright environments. Exemplary embodiments allow the display to remain visible, while avoiding possible damage due to high levels of heat or cold. | 11-26-2009 |
| 20090289581 | HIGH INTENSITY DISCHARGE LAMP LIGHTING DEVICE AND LIGHTING FIXTURE - In order to optimally control power outputted from a high intensity discharge lamp lighting device for a difference among loads connected thereto, such as a difference in gas components contained in arc tubes and a difference in shape of the arc tubes individually in a plurality of discharge lamps | 11-26-2009 |
| 20090302783 | LED ILLUMINATION SYSTEM WITH MULTIPLE INDEPENDENT LOOPS - A LED illumination system with multiple independent loops includes an input unit provided to receive a D.C. voltage, and a plurality of light module control circuits electrically connected to the input unit. Each of the light module control circuits includes a light module controller and two filtering units. The two filtering units are electrically connected to the light module controller, and receive D.C. power transmitted form the input unit to drive two set of LED illuminators, respectively. The light module controller controls current of the two set of LED illuminators via the two filtering units so as to control brightness of the LED illuminators, respectively. Therefore, the LED illuminators are controlled by the independent loops to reduce mutual influence among the LED illuminators. | 12-10-2009 |
| 20090302784 | High pressure Discharge Lamp - A high-pressure discharge lamp with a discharge vessel comprising electrodes; at least one noble gas as starting gas; at least one element selected from the group consisting of Al, In, Mg, Tl, Hg, Zn for arc transfer and discharge vessel wall heating; and at least one rare-earth halide for the generation of radiation. The lamp is designed in such a way that the light generated is dominated by molecular radiation. | 12-10-2009 |
| 20090309516 | PIXEL AND ORGANIC LIGHT EMITTING DISPLAY DEVICE USING THE SAME - A pixel capable of compensating for the threshold voltage of a driving transistor, the voltage drop of a first power source and degradation of an organic light emitting diode is provided. The pixel includes an organic light emitting diode; a second transistor (e.g., a driving transistor) coupled between the first power source and the organic light emitting diode to control the current supplied to the organic light emitting diode; a third transistor coupled between a first electrode of the second transistor and the first power source; a first transistor coupled between a gate electrode of the second transistor and a data line; a first capacitor coupled between the gate electrode and the first electrode of the second transistor; a second capacitor coupled between the first electrode of the second transistor and the first power source; and a compensation circuit coupled between the organic light emitting diode and the gate electrode of the second transistor for adjusting a voltage of the gate electrode of the second transistor in accordance with degradation of the organic light emitting diode. | 12-17-2009 |
| 20090315482 | Light emitting apparatus capable of controlling lighting color and method thereof - A light emitting apparatus and a method for controlling the same are provided. The light emitting apparatus comprises a color-temperature relation stored in a memory, a thermometer or temperature acquiring means for acquiring a temperature reading, a processor for comparing the temperature reading with the color-temperature relation and determining a lighting color, and a light emitting unit for emitting the lighting color determined by the processor. | 12-24-2009 |
| 20090315483 | LIGHT EMITTING DIODE ILLUMINATING APPARATUS - A light emitting diode (LED) illuminating apparatus ( | 12-24-2009 |
| 20090315484 | WIDE VOLTAGE, HIGH EFFICIENCY LED DRIVER CIRCUIT - An electrical circuit and method for driving light emitting diodes with a constant current via a high efficiency DC-DC converter controlled by a digital controller through pulse width modulation (PWM). | 12-24-2009 |
| 20090322254 | Apparatus and method for driving and adjusting light - An apparatus and method for driving and adjusting light is provided, applicable to the LED lighting environment. Without the necessity to change the existing wiring and lighting devices, the apparatus and method for driving and light adjusting apparatus of the present invention can enable the LED driver to adjust light so that the LED lighting device is capable of light adjustment. The apparatus and method for driving and adjusting light of the present invention lets the LED driver output stably to drive LED when the input voltage to the LED driver changes so that the LED brightness can maintain stable without flickering regardless of the unstable input voltage as well as with high efficiency and low variation of LED color temperature. In this manner, in addition to the lighting capability, the LED lighting device also has the light adjustment capability because the LED driver has the light adjustment capability. | 12-31-2009 |
| 20090322255 | Apparatus and method for driving and adjusting light - An apparatus and method for driving and adjusting light is provided, applicable to the LED lighting environment. Without the necessity to change the existing wiring and lighting devices, the driving and light adjusting apparatus of the present invention can cooperate with LED driver, by counting the number of switch ON/OFF times, to enable the LED driver to adjust light so that the LED lighting device is capable of light adjustment in addition to lighting. | 12-31-2009 |
| 20090322256 | DRIVE CIRCUIT - Provided is a drive circuit for a light emitting device, which compensates for a decrease in luminance of the light emitting device and reduces a burn-in phenomenon. The drive circuit includes: a first capacitor connected to a gate of a drive transistor; and a second capacitor formed between the first capacitor on a side to which the gate of the drive transistor is not connected, and one end of a light emitting device. The drive circuit corrects an amount of charge of the first capacitor according to a change in potential of the node when the light emitting device starts illumination, and then, causes the light emitting device to illuminate according to the corrected amount of charge. | 12-31-2009 |
| 20100019697 | Pulse-Width Modulation Current Control with Reduced Transient Time - One embodiment of the present invention includes a current regulator circuit. The circuit includes at least one switch configured to periodically couple and decouple a respective at least one voltage rail to an inductor to maintain a current through the inductor. The circuit also includes a pulse-width modulation (PWM) controller configured to set a duty-cycle associated with a switching signal to control the at least one switch based on a feedback signal that is associated with a magnitude of the current. The circuit also includes a switch-controlled current path configured to shunt the current from a load in response to a control signal. The circuit further includes an error circuit configured to provide an error term to the PWM controller upon activating the control signal to adjust the duty-cycle substantially instantaneously in response to the control signal. | 01-28-2010 |
| 20100019698 | AUTOMATIC ADAPTION OF SHED LIGHTING - The invention relates to a method, a control system and a shed wherein the lighting is adjusted depending on the presence of an animal in a specific section of a shed. The shed is divided into a number of sections, for example a separation section. When no cows have access to the separation section and the section is therefore empty, the control system ensures that the lighting in the respective section is switched off. As the control system according to the invention controls both access to the section and lighting thereof, it is possible to dispense with movement sensors for controlling lighting in the respective sections. | 01-28-2010 |
| 20100026211 | Circuit Arrangement for Operation of Discharge Lamps, and Method for Operation of Discharge Lamps - A circuit arrangement for operating a discharge lamp, wherein the circuit arrangement comprises a commutation device, which has an input which is coupled to a DC source, and has an output which can be coupled to a discharge lamp. The commutation device is designed in such a way that it couples the DC source to the output, and the polarity at which the DC source is coupled to the output can be commutated by a control device. The control device has a sync input, and the polarity of the DC source is commutated in synchronism with sync pulses of a sync signal which can be applied at the sync input. The control device has a measuring input, which is coupled to a measuring device which is designed to provide a measured value which is a measure of the size of electrode peaks. The control device suppresses at least one commutation if the measured value overshoots or undershoots a predetermined threshold value. | 02-04-2010 |
| 20100026212 | ELECTRONIC BALLAST FOR A LAMP - An electronic ballast for a lamp has at least one dimming value control input and a control unit configured to set the dimming value of the lamp, wherein arranged downstream of the dimming value control input are: a signal output state detecting unit configured to acquire at least one of a signal output state in which the signal level of a signal fed to the dimming value control input overshoots a predetermined limit value, and a signal output state in which it undershoots a predetermined limit value, and a measuring unit configured to measure the duration of a signal output state, the control unit configured to set a dimming value of the lamp being configured to set the dimming value on the basis of the measured duration of the signal output state. | 02-04-2010 |
| 20100026213 | INTEGRATED CIRCUIT CAPABLE OF SYNCHRONIZATION SIGNAL DETECTION - A method according to one embodiment may include providing power to at least one light source. The method of this embodiment may also include detecting the frequency of at least one vertical synchronization signal, among a plurality of different synchronization signals, and controlling the power to at least one light source based on, at least in part, the detected frequency of at least one vertical synchronization signal. Of course, many alternatives, variations, and modifications are possible without departing from this embodiment. | 02-04-2010 |
| 20100033112 | Driving power supply system of an active type LED with multiple channels - The present invention is to provide an active type multiple channeled LED power driving system, which is an operation system of driving power mainly designed for light source equipment using high power LED. The best system composition includes seven operation regions. The ordinary power is lead-in through a first region, and at first the regulating and filtering are proceeded by an EMC circuitry. Then, after it is lead-in a PWM circuitry to raise its power, the voltage transformation is processed through the second region. After it is further regulated and filtered to form the optimum power through the CC&CV control circuitry in the third region, it proceeds multiple channeled splitting by the fourth region. And, the original DC (direct current) power output is modulated into the intermittent electric power capable of controlling the output frequency and width of period by intermittent modulating circuitry in the fifth region. It further is output to the LED lighting modules of the sixth region to proceed the light source activation operation. At the same time, there is an environment parameters' sensor set in the seventh region to feedback the temperature coefficients of the LED lighting module to the CC&CV control circuitry in the third region to proceed the adjustment and judgment in its curve of output voltage and current. Through this, it can achieve the active electronic typed heat dissipation and raise the energy efficiency thus let the LED lamp and lantern be able to achieve its maximum performance. | 02-11-2010 |
| 20100039048 | Inverter controller and system - A driving circuit for driving loads includes a switch circuit, a transformer, a current sensing circuit, and an inverter controller. The switch circuit and the transformer are used for converting a DC electric power to an AC electric power so as to energize the loads. The current sensing circuit coupled to the loads generates a feedback current signal indicative of a current flowing through the loads. The inverter controller includes a switch drive circuit, a current regulation circuit receiving the feedback current signal, and a mode controller circuit. The switch drive circuit controls the switch circuit so as to adjust power delivered to the primary winding of the transformer in accordance with the feedback current signal. The mode controller disables the switch circuit through the switch drive circuit if the external signal is in an absence state for a predetermined period. | 02-18-2010 |
| 20100052573 | LED REGULATION CIRCUIT AND METHOD - An LED regulation circuit and method include a voltage transformation unit to receive DC power and provide a constant current to drive at least one LED and a pulse-width modulation unit to generate a driving signal to control the voltage transformation unit. The driving signal of the pulse-width modulation unit has an operation period. In the operation period, the driving signal drives the voltage transformation unit to output regular operation power. The pulse-width modulation unit is connected to a timing regulation unit which generates a regulation signal sent to the pulse-width modulation unit to regulate the operation period of the driving signal by adding a sleep period. In the sleep period, the driving signal lowers the power of the voltage transformation unit that drives the LED. Through alternately controlling the operation period and sleep period of the driving signal, continuous heat generation and heat accumulation can be reduced. | 03-04-2010 |
| 20100052574 | BATTERY-POWERED OCCUPANCY SENSOR - A load control system comprises a load control device and a battery-powered occupancy sensor, which transmits a first wireless signal to the load control device in response to detecting the presence of an occupant in a space. The load control system further comprises a visual indicator for providing a visual indication when the magnitude of a battery voltage of a battery of the occupancy sensor has dropped below a predetermined low-battery voltage threshold. The occupancy sensor may comprise the visual indicator, such that the visual indicator is illuminated when the occupancy detects the presence of the occupant in the space and the magnitude of the battery voltage is less than the predetermined threshold. Alternatively, the load control device may comprise the visual indicator, such that the visual indicator is illuminated in response to receiving a second wireless signal, which is transmitting by the occupancy sensor when the magnitude of the battery voltage is less than the predetermined threshold. | 03-04-2010 |
| 20100060200 | ELECTRONIC BALLAST HAVING A SYMMETRIC TOPOLOGY - An electronic ballast for driving a gas discharge lamp having first and second electrodes comprises an inverter circuit and a symmetric resonant tank circuit for minimizing the RFI noise produced at the electrodes of the lamp. The inverter circuit receives a substantially DC bus voltage generates a high-frequency AC voltage. The symmetric resonant tank circuit comprises a split resonant inductor having first and second windings magnetically coupled together. The first and second windings electrically coupled between the respective electrodes of the lamp and the inverter circuit. The symmetric resonant tank further comprises first and second capacitors coupled in series electrical connection between the electrodes of the lamp with the junction of the first and second capacitors coupled to the DC bus voltage at the input of the inverter circuit. | 03-11-2010 |
| 20100060201 | METHOD OF CONTROLLING A BALLAST FOR A HIGH INTENSITY DISCHARGE LAMP AND RELATED SYSTEM - A method of controlling a ballast for a high intensity discharge (HID) lamp and related system. The method includes setting initial operating parameters of the ballast to turn on the HID lamp, generating starting transient electric characteristic values of the HID lamp by measuring actual electric parameters at a predetermined time during a transient process after the HID lamp is turned on, searching stored data for a rated power corresponding to the starting transient electric characteristic value range of the HID lamp after determining that the starting transient electric characteristic value is within stored starting transient electric characteristic value ranges of the HID lamp, and searching the stored data for a corresponding ballast operating parameter, to allow the HID lamp to operate in the corresponding rated power, and realize that a single ballast can be adapted to and control the HID lamps to operable in their respective specific rated power. | 03-11-2010 |
| 20100060202 | Lighting System with Lighting Dimmer Output Mapping - A system and method map dimming levels of a lighting dimmer to light source control signals using a predetermined lighting output function. The dimmer generates a dimmer output signal value. At any particular period of time, the dimmer output signal value represents one of multiple dimming levels. In at least one embodiment, the lighting output function maps the dimmer output signal value to a dimming value different than the dimming level represented by the dimmer output signal value. The lighting output function converts a dimmer output signal values corresponding to measured light levels to perception based light levels. A light source driver operates a light source in accordance with the predetermined lighting output function. The system and method can include a filter to modify at least a set of the dimmer output signal values prior to mapping the dimmer output signal values to a new dimming level. | 03-11-2010 |
| 20100060203 | OMNI VOLTAGE DIRECT CURRENT POWER SUPPLY - A battery operated LED lighting apparatus including: a battery outputting a battery voltage; a light emitting diode or array of light emitting diodes; and a power supply including a boost regulating circuit. The power supply being in communication with the battery and the light emitting diodes such that a constant voltage or constant current is supplied to the light emitting diodes as the battery discharges and the battery voltage falls below the output voltage. In a preferred embodiment the power supply further includes a buck regulator to maintain the proper output voltage when the battery voltage is greater than the output voltage. | 03-11-2010 |
| 20100060204 | POWER SUPPLY UNIT HAVING DIMMER FUNCTION AND LIGHTING UNIT - In a power supply unit, if a dimmer rate is changed within a range of k | 03-11-2010 |
| 20100079090 | Light Emitting Driver Circuit with Compensation and Method - A light emitting driver circuit, system, and method are provided. The driver circuit system and method can be implemented in various ways. An embodiment includes a bypass circuit which diverts current from the LEDs whenever a switch coupled to the LEDs incurs residual current when turned off. In an additional or alternative embodiment, the residual current can be sensed and the amount of residual current used to trigger fetching of a compensation value. That compensation value can change a dimming function forwarded to the switch in order to compensate for, offset, or substantially eliminate the residual current through that switch. | 04-01-2010 |
| 20100084994 | Energy-saving drive device for controlling an led heat dissipation temperature - An energy-saving drive device for controlling an LED heat dissipation temperature wherein, when the device converts signal voltage into operating energy for control, a feedback signal voltage is obtained at the LED load terminal. Meanwhile, the signal voltage is continuously compared by the calculus processor. Moreover, the oscillation waveform, the amplitude voltage, and the linearity of waveform are controlled by at least 3 times of software modulation to automatically offset and amplify the attenuated signal voltage and to enable the power amplifier to output a new operating voltage signal for correcting the voltage and the current, thereby driving the LED of high luminance and high power in the conditions of low voltage and low current depending on a load characteristic of the LED for achievement of the efficiency of energy conservation, no issue on overheating, and the virtues of safety and environmental protection. | 04-08-2010 |
| 20100090618 | DIMMABLE LIGHTING SYSTEM - A lighting system for operation with a dimmer circuit comprising a triac connected to a load. The load comprises a driver circuit for supplying current to a light source comprising one or more LEDs, the current being determined at least in part by an adjusted setpoint value. The system further comprises a setpoint filter circuit for obtaining a dimmer setpoint value determined at least in part by a setting of the dimmer circuit, and for generating an adjusted setpoint value. The sensitivity of the adjusted setpoint value to changes in the dimmer setpoint value is low at low values of the dimmer setpoint value. | 04-15-2010 |
| 20100102757 | HID Lamp Ballast with Controlled DC Step Down Circuit - An electronic ballast is provided for powering a high intensity discharge lamp. A voltage step-down circuit is arranged to reduce an input DC voltage. An inverter circuit includes at least one high frequency switching element is and arranged to convert the reduced voltage to a high frequency AC voltage. A resonant circuit receives the high frequency voltage and is further coupled to the discharge lamp. A voltage step-down control circuit controls the DC voltage output from the voltage step-down circuit. A driving circuit supplies a driving signal to the switching element of the inverter, and further adjusts a driving frequency of the driving signal, thereby controlling the high-frequency voltage. The high frequency voltage in a first operating mode is controlled to a low level wherein the lamp is prevented from starting. The high frequency voltage in a second operating mode is controlled to a high level wherein the discharge lamp can be started. | 04-29-2010 |
| 20100102758 | Illumination apparatus - An illumination apparatus includes a light source unit having solid light-emitting elements and a sensor unit having a wave transmission portion for transmitting energy waves of specified frequency and a wave reception portion for receiving the energy waves reflected from an object. The sensor unit outputs a detection signal by detecting the object within a detection range based on the difference in frequency between the transmitted and received energy waves. The illumination apparatus further includes a control unit responsive to the detection signal from the sensor unit for performing a control operation to turn on the light source unit, and a power source unit for supplying electric power to the light source unit. The power source unit is arranged outside the detection range of the sensor unit. The sensor unit is provided on the opposite side to the direction of light irradiated from the light source unit. | 04-29-2010 |
| 20100109571 | INSULATION TYPE AC-DC CONVERTER AND LED DC POWER SUPPLY DEVICE USING THE SAME - In an insulation type AC-dc converter in which input current from a commercial power supply is converted to obtain insulated direct current, the overall efficiency is raised and the structure is simplified. A multi-resonance type half-bridge DC-DC converter having an insulation transformer T is used as a first converter, and a boosting chopper circuit for power factor improvement is used as a second converter. Hence through multi-resonance operation, increases in losses can be suppressed even when the switching frequency is raised, and because a half-bridge circuit is used, switching elements and similar with lower voltage ratings can be employed, whereby overall efficiency can be increased. Moreover, a voltage substantially similar to the full-wave rectified waveform of the power supply voltage is obtained from the output capacitor at the boosting chopper circuit input, whereby there is no need for a feed-forward circuit across the insulation transformer, and moreover the electrolytic capacitor which had to be provided on the converter input side is unnecessary. This is advantageous for achieving miniaturization and a thin design. | 05-06-2010 |
| 20100109572 | HIGH-PRESSURE DISCHARGE LAMP BALLAST WITH RAPID LAMP RESTART CIRCUIT - An electronic ballast is provided for quickly restarting a high-pressure discharge lamp after shutdown. The ballast includes a power supply circuit for supplying power to the lamp from a commercial power source, a start voltage generation circuit for supplying a starting high voltage to the lamp and a control circuit for controlling the power supply circuit and the start voltage generation circuit. A lighting transition module detects a startup or shutdown of the lamp. A lighting time count module measures a lighting time of the lamp when startup is detected. A comparison module compares the lighting time and a first reference time when shutdown is detected. A delay time setting module sets a predetermined delay time of the start voltage generation circuit based on the comparison result. Operation of the ballast is halted from a startup trigger until lapse of the delay time, and then the high starting voltage is supplied to the lamp. | 05-06-2010 |
| 20100109573 | DISCHARGE LAMP LIGHTING CIRCUIT - A discharge lamp lighting circuit facilitates carrying out re-ignition and addresses a problem than can arise due to an influence of a capacitor in an auxiliary lighting circuit. A driving voltage generating portion supplies an AC driving voltage to a discharge lamp to be a driving target. An auxiliary lighting circuit is provided on a terminal side of the discharge lamp. An auxiliary lighting capacitor, an auxiliary lighting resistor and a switch are provided in series between the terminal of the discharge lamp and a fixed voltage terminal. A control circuit controls a conducting state of the switch. The switch is brought into an ON state before the discharge lamp is turned ON, and is brought into an OFF state after the discharge lamp is turned ON. | 05-06-2010 |
| 20100109574 | ARRANGEMENT INCLUDING AN ELECTRONIC BALLAST AND DIMMING CONTROL APPARATUS CONNECTED THERETO, AND METHOD FOR OPERATING A LAMP - An arrangement is provided, including an electronic ballast having two terminals to which the electronic ballast applies voltage during operation, wherein the electronic ballast is configured to distinguish between different loads connected to the terminals and thus to obtain an analysis result, wherein it is configured to drive a lamp, which is connected to it, as a function of the analysis result; and a control apparatus, which is connected to the two terminals and draws energy for its operation via a voltage present at the two terminals, and which has a clock and can change the load, which is present between the two terminals, via an electronic controller as a function of information or signals provided by the clock. | 05-06-2010 |
| 20100127641 | SELF-OSCILLATING SWITCH CIRCUIT AND A DRIVER CIRCUIT COMPRISING SUCH A SWITCH CIRCUIT - A self-oscillating switch circuit is configured for use in a switching DC-DC converter (switched mode power supply (SMPS)). The self-oscillating switch circuit comprises an input terminal (Tin | 05-27-2010 |
| 20100134048 | HID-Lamp Control Method and Circuit - A method and circuit for controlling an HID lamp powered by an HID ballast during warm-up includes gradually increasing the lamp power as the lamp voltage increases. The method includes the steps of calculating a variable reference signal as a function of the lamp voltage and controlling the lamp operating conditions based on the variable reference signal and a feedback signal, to thereby keep the lamp current within a range around a substantially constant target value during warm-up. | 06-03-2010 |
| 20100134049 | LED LAMP-LIGHTING CIRCUIT AND LED LAMP AS WELL AS AN LED LAMP-LIGHTING CONVERSION SOCKET - To stably illuminate an LED lamp even when an internally-excited electronic transformer is used in the power supply circuit, the full wave of the AC voltage supplied from the power supply circuit is rectified using a current rectifying circuit. When the power supply starts, current flows into a start-assist circuit for a specific period of time. Subsequently, when the fixed current load circuit begins operating, the current will flow into the fixed current load circuit. When the current flows into the LED driver, operation of the fixed current load circuit is stopped by a current-stopping circuit. Because the current flows into the lamp-lighting circuit across the entire voltage output even when an internally-excited electronic transformer is used in the power supply circuit, operation of the internally-excited electronic transformer will not stop and will not become unstable. When the LED is not connected, the fixed current load circuit is stopped. | 06-03-2010 |
| 20100141178 | DIMMER CONTROL LEAKAGE PULL DOWN USING MAIN POWER DEVICE IN FLYBACK CONVERTER - A flyback controller-may include a dimmer input configured to receive a chopped and rectified AC voltage. Each cycle of the signal may have an off period which is substantially attenuated but not always zero due to leakage of a dimmer control from which the chopped AC voltage originates, and an on period which substantially tracks the AC voltage. The ratio of the off period to the on period may be dependent upon a setting of the dimmer control. The flyback controller may include a control circuit configured to generate a switching signal based on the signal from the dimmer input. The switching signal may controllably oscillate between its on and off states during the on periods of the chopped and rectified AC voltage so as to controllably regulate current that is delivered by a secondary winding of a transformer in a flyback converter. The switching signal may be in the on state during the off periods of the chopped and rectified AC voltage, thereby preventing a voltage build up from the dimmer control leakage. | 06-10-2010 |
| 20100141179 | Universal input voltage light emitting device - The configurations of a light emitting device are provided in the present invention. The proposed device includes a light source, an enclosure, and an integrated control circuitry coupled to the light source, enclosed in the enclosure and receiving a universal input voltage. | 06-10-2010 |
| 20100148699 | CIRCUIT CONFIGURATION FOR OPERATING AT LEAST ONE DISCHARGE LAMP AND METHOD FOR GENERATING AN AUXILIARY VOLTAGE - A circuit arrangement for operating at least one discharge lamp may include: a first and a second input terminal for connecting a supply voltage; an inverter, which includes at least one first switch and one second switch, which are coupled in series between the first and the second input terminal and between which a bridge center point is defined; a drive circuit for at least the first switch and the second switch with an input for receiving a control signal; an apparatus for generating an auxiliary voltage. The apparatus may include: a first capacitor; a terminal for the provision of the auxiliary voltage, which terminal is coupled to a reference potential via the first capacitor; a two-state controller with a first input to which the control signal in inverted form is coupled, a second input, which is coupled to the terminal for the provision of the auxiliary voltage, and an output; a switch—with a control electrode, a working electrode and a reference electrode, the control electrode being coupled to the output of the two-state controller, the working electrode being coupled to the terminal for the provision of the auxiliary voltage; and a nonreactive resistor; wherein the apparatus for generating the auxiliary voltage furthermore includes a transformer with a primary winding and a secondary winding, the transformer being coupled to the first and the second input terminal, the terminal for the provision of the auxiliary voltage and the switch-in such a way that a current through the switch results in a current through the primary winding, in a current through the secondary winding and therefore in charging of the first capacitor. | 06-17-2010 |
| 20100148700 | Constant Current Output Sink or Source - A constant current output sink or source eliminates a current limiting series resistor for a light emitting diode (LED) and maintains a constant light intensity from the LED for all operating and manufacturing variables of a digital device since the current through the LED is maintained at a constant value. The constant current output sink or source may be programmable for selection of a constant current value from a plurality of constant current values available. | 06-17-2010 |
| 20100156322 | LOW POWER NON-ISOLATED DRIVER - The present invention mainly discloses low power non-isolated driver that can be used for LED lighting and other non-isolated power supply appliance, in which the input side is connected to an AC or DC input, a PWM control circuit is connected to the buck converter switch, a capacitor filters the output voltage ripple and an output voltage/current control circuit provides feedback signal to the PWM control circuit. The present invention has such features of less component number, low total cost, high reliability, and better line/load regulation. | 06-24-2010 |
| 20100156323 | Light emitting device driver circuit and method for driving light emitting device - The present invention discloses a light emitting device driver circuit and a method for driving a light emitting device. The circuit comprises: a power stage performing power conversion on an input voltage to supply an output current to one or more light emitting devices; and a control circuit sensing the output current of the power stage to feedback control the power stage accordingly. | 06-24-2010 |
| 20100156324 | LED DRIVER CIRCUIT WITH OVER-CURRENT PROTECTION DURING A SHORT CIRCUIT CONDITION - An LED driver circuit is provided for protecting one (or more) LEDs connected in series from over-current damages which may result from a short circuit condition. The driver circuit includes a current control circuit for receiving an input signal from a power source and providing a current output for powering the LED. A voltage sensor detects a voltage across the LED. An LED current restriction circuit such as a switching element restricts a current flow into the LED. A short circuit response circuit controls the LED current restriction circuit dependent on a comparison between the voltage detected by the voltage sensor and a predetermined threshold value. When the detected voltage is less than or equal to the threshold value, the response circuit determines a short circuit, and a signal is sent to the current restriction circuit to restrict current flow into the one or more LEDs. | 06-24-2010 |
| 20100156325 | HIGH EFFICIENCY POWER CONDITIONING CIRCUIT FOR LIGHTING DEVICE - A power conditioning circuit in a light bulb efficiently converts an Alternating Current (AC) input voltage into Direct Current (DC) power for operating LEDs in the light bulb. The power conditioning circuit discharges capacitors when a voltage level of the input voltage drops below a given voltage necessary to operate the LEDs. The capacitors are then recharged when the input voltage is high enough to power the LED. The capacitors are configured to operate as voltage dividers while being charged thus reducing a peak voltage level of the output voltage used for powering the LEDs. The reduced output voltage reduces the overall amount of energy used by the light bulb and reduces the amount of heat radiated by the light bulb. | 06-24-2010 |
| 20100164406 | SWITCHING POWER CONVERTER CONTROL WITH TRIAC-BASED LEADING EDGE DIMMER COMPATIBILITY - In at least one embodiment, a controller allows triac-based dimmer to properly function and dim a load whose voltage is regulated by a switching power converter. In at least one embodiment, the switching power converter includes a switch to control voltage conversion of an input voltage to the switching power converter, wherein phase delays are introduced in the input voltage by a triac-based dimmer during a dimming period. In at least one embodiment, the controller is configured to control the switch of the switching power converter to establish an input resistance of the switching power converter during a dimming portion of the input voltage, wherein the input resistance allows the triac-based dimmer to phase modulate a supply voltage to the dimmer so that an output voltage of the dimmer has a substantially uninterrupted phase delay during each half-cycle of the supply voltage during the dimming period. | 07-01-2010 |
| 20100164407 | SENSING TYPE CONTROL CIRCUIT FOR ELECTRONIC APPARATUS - A sensing type control circuit for an electronic apparatus is provided. An output unit is coupled between an external power source and the electronic apparatus and provides varied power supply to the electronic apparatus according to a control signal. A switch is coupled between the external power source and the output unit and disconnects or connects the external power source. A control unit receives a sensing signal and generates the control signal to the output unit according to the received signal. A sensing unit includes a sensing device and senses an external variation, wherein the sensing unit generates the sensing signal to the control unit when the sensing device senses an excitation. | 07-01-2010 |
| 20100164408 | LIGHT SOURCE CONTROL DEVICE - A light source control device is provided. A switching seat includes a switching key and a sensing device. A switching circuit is disposed between an external power source and a control circuit to disconnect or connect the external power source, and includes a mechanical switch, an electronic switch and a sensing unit. The mechanical switch is directly connected to the switching key, and is controlled to turn on or off by switching the switching key. The electronic switch is coupled to the sensing unit, and the sensing unit generates a sensing signal to control the electronic switch to turn on or off when the sensing device senses an excitation. The control circuit provides varied power supply to a light source according to the received signal. | 07-01-2010 |
| 20100171443 | INDUCTION LAMP WITH BRIGHTNESS ADJUSTMENT CAPABILITY - An induction lamp includes a brightness control module, an induction unit, a register, and an illuminating unit. The brightness control module, the induction unit, the register, and the illuminating unit are electrically connected to each other in that order. When the induction unit detects a control signal from a user, the induction unit sends a detecting signal to change an address of the register, and the brightness control module controls a brightness of the illuminating unit depending on the address of the register. | 07-08-2010 |
| 20100176747 | OUTPUT BUFFER AND SOURCE DRIVER USING THE SAME - An output buffer and a source driver using the same are provided. The output buffer includes an input stage module, a first output stage module, a second output stage module, and a first control module. The input stage module generates a first bias signal via a first connection terminal according to a driving signal and a output signal. The first output stage module generates the output signal in response to the first bias signal via an output terminal of the output buffer. The second output stage module generates a second bias signal in response to the first bias signal via a second connection terminal, and controls a first switch in the second output stage module. The first control module selectively connects a first current source to the output terminal of the output buffer or to the second connection terminal of the second output stage module according to an indication signal. | 07-15-2010 |
| 20100176748 | TRANSMITTER AND INFORMATION PROCESSING DEVICE CONVERTING SUPPLY VOLTAGE TO DRIVE VOLTAGE - A transmitter includes a voltage conversion circuit converting supply voltage externally supplied into drive voltage and outputting the drive voltage; and an optical output unit which is supplied with the drive voltage and outputs an optical signal, wherein the voltage conversion circuit and the optical output unit are included in a same module. | 07-15-2010 |
| 20100181934 | AUTOMATIC, LOW LEVEL FLOOR LIGHTING SYSTEM - An automatic, low level floor lighting system includes a light unit including a light operable to produce visible light when energized by a power source and a control means for allowing a user to adjust an intensity of the visible light. The light unit also includes an ambient light sensor to inhibit the light from being energized when an ambient light is above a predetermined level. The light unit further includes a receiver for receiving an activation signal to energize the light and a deactivation signal to de-energize the light. A transmitter transmits the activation and deactivation signals to an additional light unit. The system also includes a remote activation unit for transmitting the activation and deactivation signals to the receiver when the user engages the remote activation unit where the user can remotely turn the light on and off when the ambient light is below the predetermined level. | 07-22-2010 |
| 20100181935 | UNIVERSAL DIMMING METHOD AND SYSTEM - A universal line voltage dimming method and system, with a control circuit for an electronic ballast operable to receive ballast input power and an outboard dedicated dimming signal including a power sensing circuit ( | 07-22-2010 |
| 20100181936 | Driver Device for a Load and Method of Driving a Load With Such A Driver Device - The invention relates to a driver device for a load ( | 07-22-2010 |
| 20100188020 | HIGH FREQUENCY BALLAST FOR A FIXED OUTPUT HIGH INTENSITY DISCHARGE LAMP - A high frequency ballast for a fixed output high intensity discharge lamp is serially connected in order with a power input circuit, an electromagnetic wave interference filtering loop, a rectifying loop, a high power factor correction loop, a voltage-controlled oscillator ballast driver and a load loop, wherein the voltage-controlled oscillator ballast driver is connected with an ignition sequence control logic loop by a built-in voltage oscillator, and a half-bridge driving loop receives power transmitted by the high power factor correction loop and then converts into a steady power output by the ignition sequence control logic loop. When a lamp cannot start successfully, it can start by itself repeatedly through a restart triggering loop; and after the lamp has started, an operational amplifier circuit is used to maintain an original frequency which sets the power, so as to adjust automatically according to the lamps of various frequencies. | 07-29-2010 |
| 20100188021 | ELECTRONIC BALLAST AND METHOD FOR OPERATING AT LEAST ONE DISCHARGE LAMP - An electronic ballast is provided, including first a second input connections for connecting an alternating supply voltage; an EMC filter; a rectifier; a capacitor for providing the DC operating voltage for the output stage; and a power factor correction device, which comprises a number n of partial devices for power factor correction, as well as a control device for controlling the number n of partial devices, the power to be provided at the output of the power factor correction device being a total power currently to be provided, the power to be provided by the partial device i being a currently to be provided partial power of the partial device i. The control device is configured to control at least first and second partial devices as a function of the currently to be provided total power in such that their currently to be provided partial powers differ from one another. | 07-29-2010 |
| 20100194309 | CONTROLLER FOR DISCHARGE LAMP AND LIGHT SOURCE DEVICE - A control circuit for a discharge lamp, which can improve the lighting performance of the discharge lamp while realizing low power consumption, and a light source device are provided. The resistance value of the variable resistor (R | 08-05-2010 |
| 20100194310 | CONTROL CIRCUIT FOR INVERTER - A reference voltage source generates a reference voltage for adjusting an electric current for a dimming operation. The first current source generates a first current. A first current mirror circuit includes multiple output terminals, duplicates the first current, and outputs multiple first duplicated currents via the multiple output terminals. Multiple first switches are provided on paths for the respective multiple first duplicated currents. A converting resistor, with one terminal set to a fixed electric potential, is provided on a path for the multiple first duplicated currents output from the first current mirror circuit. A decoder circuit receives a control signal from an external circuit, and controls the ON/OFF operations of the multiple first switches. The reference voltage source outputs, as the reference voltage, a voltage that corresponds to a voltage drop that occurs at a converting resistor. | 08-05-2010 |
| 20100194311 | DRIVING DEVICE FOR DISCHARGE LAMP, LIGHT SOURCE DEVICE, PROJECTOR, AND DRIVING METHOD FOR DISCHARGE LAMP - A driving device adapted to drive a discharge lamp including first and second electrodes adapted to generate discharge light, a primary reflecting mirror disposed on a side of the second electrode and adapted to reflect the discharge light, a secondary reflecting mirror disposed on a side of the first electrode and adapted to reflect the discharge light. The driving device includes: a deterioration detection section adapted to detect a degree of progression of deterioration in the first and the second electrodes; and a deterioration handling section adapted to increase first anode power energy, which is supplied while the first electrode acts as an anode, in accordance with the degree of progression of the deterioration detected by the deterioration detection section. | 08-05-2010 |
| 20100201287 | Method and Apparatus for Achieving Inherent Ignition Voltage in Operation of a High Intensity Discharge Lamp - A high intensity discharge lamp, such as a high power sodium or metal halide lamp, having an electronic ballast. The electronic ballast may incorporate resonance-based circuitry for achieving an ignition state via a frequency sweeping step, the particular ignition voltage being inherent to the operational state of the high intensity discharge lamp. The operating state of the lamp may be sensed in order to apply power and voltage levels appropriate for steady state operation. | 08-12-2010 |
| 20100207547 | SWITCHING POWER SUPPLY FOR AN ILLUMINATION DEVICE WITH PRECISION CURRENT CONTROL - A system and method for powering a light-emitting element in an illumination device includes a DC power supply with the light-emitting element coupled across a positive output terminal and a negative output terminal of the DC power supply. A switching element is coupled between the light-emitting element and the negative output terminal. An average current value across the light-emitting element is measured each time the switching element is turned on. A control circuit generates a PWM signal having a pulse width determined based on the calculated average current value and a predetermined target value, and applies the PWM signal to drive the switching element on and off in accordance with the determined pulse width, and a current is generated across the light-emitting element. | 08-19-2010 |
| 20100213875 | Power Supply Controlling Device - A power supply controlling device includes a main controlling unit, the main controlling unit stores daily sunrise and sunset time data from January 1 | 08-26-2010 |
| 20100219773 | LIGHT-EMITTING DIODE CONTROLLER - Light-emitting diode controller | 09-02-2010 |
| 20100225250 | DRIVE CIRCUIT OF DC/DC CONVERTER, LIGHT EMITTING APPARATUS AND ELECTRONIC DEVICE USING THE SAME - A drive circuit controls the on/off state of a switching transistor of a DC/DC converter. A first resistor is provided on a path of current flowing through a primary coil of a transformer connected to the switching transistor, and one end of the first resistor is grounded. A second resistor is provided on a path of current flowing through a secondary coil of the transformer, and one end of the second resistor is grounded. A switching controller turns off the switching transistor when a first detection voltage exceeds a first threshold voltage and, turns on the switching transistor after lapse of predetermined delay time since a second detection voltage exceeds the second threshold voltage. | 09-09-2010 |
| 20100225251 | LED DRIVE CIRCUIT, LED LAMP, LED LIGHTING APPLIANCE, AND LED LIGHTING SYSTEM - An LED drive circuit receives an alternating-current voltage and drives an LED. The LED drive circuit has a current extractor which extracts a current from the current supply line through which an LED drive current is supplied to the LED, and a timing adjuster which adjusts the current extraction start timing and the current extraction duration in the current extractor. | 09-09-2010 |
| 20100231140 | DATA BASED AMBIENT LIGHTING CONTROL - In controlling an ambient lighting element, a category of data being rendered by a host is identified, ambient lighting data associated with the identified category is retrieved, and the retrieved ambient lighting data is rendered in correspondence with the rendered data. The retrieved ambient lighting data may be an ambient light script arranged to determine temporal portions of ambient lighting data. The ambient lighting data may be associated with the category based on user input. A sub-category of the data may be identified and the retrieved ambient lighting data may be modified with additional ambient lighting data associated with the sub-category. An association of a category with ambient lighting data may be edited by a user. A default association of a category to ambient lighting data may be provided. | 09-16-2010 |
| 20100231141 | DRIVING CIRCUIT FOR LED - A driving circuit for LED includes: at least one LED; a light emission driving circuit having a first PWM unit and a power converting unit generating a driving current according to a signal generated by the first PWM unit and sending the driving current to the LED; a shunt parallel-connected with the LED; and a signal generating unit for generating a signal to switch on or off an electrical connection between the shunt and the light emission driving circuit. When the signal from the signal generating unit is at a high level, the electrical connection is switched on so that a majority of the residual driving current flows to the shunt. | 09-16-2010 |
| 20100237804 | CONSTANT BRIGHTNESS CONTROL FOR ELECTROLUMINESCENT LAMP - A ballast ( | 09-23-2010 |
| 20100244741 | DISCHARGE LAMP LIGHTING DEVICE AND LIGHTING FIXTURE - One output power characteristic curve for supplying constant power is provided with respect to a raging voltage range of a discharge lamp, and in addition, a plurality of output power characteristic curves W | 09-30-2010 |
| 20100244742 | VARIABLE COLOR DISCHARGE LAMP - A variable color discharge lamp including a first lamp tube, a second lamp tube and a variable voltage system is provided. The first lamp tube having a first diameter has a first fluorescent powder disposed therein. The second lamp tube connected to the first lamp tube has a second diameter not equal to the first diameter. The second lamp tube has a second fluorescent powder disposed therein, wherein the second color temperature of the second fluorescent powder is not equal to the first color temperature of the first fluorescent powder. The variable voltage system provides and adjusts a common voltage of the first lamp tube and the second lamp tube. When the common voltage is adjusted, respective luminescence efficiencies of the first fluorescent powder and the second fluorescent powder vary with the common voltage, so as to adjust the mixed light color of the first and the second lamp tubes. | 09-30-2010 |
| 20100244743 | LIGHTING EQUIPMENT - An illumination apparatus, which controls a supply power supplied to a lamp according to an accumulated interval of on-time and a light control signal, is configured in which a maximum supply power supplied to the lamp according to the accumulated interval of on-time is supplied to the lamp when the supply power to the lamp corresponding to the light control signal is above the maximum supply power to the lamp according to the accumulated interval of on-time at a point when the illumination apparatus is turned on or the lamp starts lighting. When the light control signal is operated so as to exceed a level of the maximum supply power to the lamp according to the accumulated interval of on-time or the light control signal varies more than a prescribed level, the supply power is shifted to an adjustable condition so as to be higher than the maximum supply power to the lamp according to the accumulated interval of on-time. | 09-30-2010 |
| 20100244744 | METHOD OF DRIVING A GAS-DISCHARGE LAMP - The invention describes a method of driving a gas-discharge lamp ( | 09-30-2010 |
| 20100253244 | Fluorescent Lamp Dimming Controller Apparatus and System - A dimming controller and system is provided in either discrete or integrated form and includes a single electronic controller device and a dimming ballast for installation in an overhead fluorescent fixture. The system functions to sense power line changes caused by the flicking of a switch between OFF and ON and controls the light dimming accordingly. The power line changes may be either changes in mains frequency or user caused switch toggling. | 10-07-2010 |
| 20100259194 | DEVICE FOR DRIVING A LOAD | 10-14-2010 |
| 20100259195 | ELECTRONIC BALLAST FOR AN HID LAMP WITH LAMP RE-START CONTROL - An electronic ballast for a high intensity discharge lamp includes a control circuit for switching between a first operation period to operate a starting voltage generating circuit to start the lamp and a second operation period to maintain a steady arc discharge after the lamp has started, based on a detection result from a lighting detector circuit. The control circuit further includes a measurement circuit to measure operation information of the first operation period, circuits to control operation during the first operation period based on a result of measurement from the measurement circuit, and a reset circuit to initialize the operation information of the first operation period measured by the measurement circuit upon continuation of the second operation period for a reference time or longer. | 10-14-2010 |
| 20100264848 | METHOD OF SHUTTING DOWN A HIGH PRESSURE DISCHARGE LAMP AND DRIVING UNIT FOR DRIVING A HIGH PRESSURE DISCHARGE LAMP - The invention describes a method of shutting down a high pressure discharge lamp ( | 10-21-2010 |
| 20100270948 | DIMMER AND LIGHTING APPARATUS - A dimmer and a lighting apparatus are provided. The dimmer apparatus includes a rectifier unit, a controller, a voltage divider and a voltage converter. The rectifier unit rectifies an AC power and generates a first operating voltage. The voltage divider outputs a voltage division of the first operating voltage. The controller integrates the voltage division to obtain an average voltage, and provides a pulse width modulation (PWM) signal based on the average voltage. The voltage converter drives a light emitting diode (LED), and adjusts a driving voltage and a driving current of the LED according to the PWM signal. Wherein, the controller also adjusts the PWM signal according to a feedback signal generated by the voltage converter. | 10-28-2010 |
| 20100270949 | ELECTRONIC BALLAST WITH INPUT VOLTAGE FAULT CONTROL - An electronic ballast includes circuitry to prevent a switch from being damaged in the case where an abnormality occurs in an output voltage of an input power supply. A DC power supply control circuit has a zero current detection circuit that, when a current through an inductor becomes equal to or less than a predetermined current value, outputs a zero signal. A peak current detection circuit, when current through a switch the DC power supply circuit becomes equal to or greater than the predetermined current value, outputs a peak signal. A first drive circuit turns on the switch according to the zero signal, and turns off the switch Q | 10-28-2010 |
| 20100270950 | DC/DC CONVERTER - A control circuit of a DC/DC converter is provided for supplying a driving voltage to a light emitting element. A hysteresis comparator compares a detection voltage that corresponds to the output voltage of the DC/DC converter with two threshold voltages. If the detection voltage is smaller than the lower threshold voltage, the hysteresis comparator outputs a comparison signal at the low level. Otherwise, the comparison signal is set to the high level. The switching control unit uses the comparison signal as a reference. The switching control unit instructs the switching transistor of the DC/DC converter to perform the switching operation during a period when the comparison signal is at the low level. Otherwise, the switching operation is suspended. The control circuit inhibits light emission of the light emitting element during a period when the comparison signal is at the low level. Otherwise, the control circuit permits the light emission. | 10-28-2010 |
| 20100277100 | ELECTRONIC BALLAST WITH DIMMING CONTROL FROM POWER LINE SENSING - The present invention discloses an electronic ballast with dimming control from power line sensing for a fluorescent lamp, comprising: a line switching sensing circuit, used to generate a switching sensing signal by performing a voltage comparison operation on a DC voltage, and generate a reset signal according to the off time of the power line; a control voltage generator, used to generate a control voltage according to the count of said switching sensing signal; a voltage controlled oscillator, used to generate an oscillating signal according to the control voltage; and a non-overlapping driver, used to generate a high side driving signal and a low side driving signal according to the oscillating signal. | 11-04-2010 |
| 20100277101 | ELECTRONIC BALLAST WITH DIMMING CONTROL FROM POWER LINE SENSING - The present invention discloses an electronic ballast with dimming control from power line sensing for a fluorescent lamp, comprising: a line switching sensing circuit, used to generate a switching sensing signal by performing a voltage comparison operation on a DC voltage; an oscillating signal gating unit, used to gate an oscillating signal with a pulse signal to generate a gated oscillating signal, wherein the pulse width of the pulse signal is generated according to the switching sensing signal; and a non-overlapping driver, used to generate a high side driving signal and a low side driving signal according to the gated oscillating signal. | 11-04-2010 |
| 20100277102 | ELECTRONIC BALLAST WITH DIMMING CONTROL FROM POWER LINE SENSING - The present invention discloses an electronic ballast with dimming control from power line sensing for a fluorescent lamp, comprising: a line switching sensing circuit, used to generate a switching sensing signal by performing a voltage comparison operation on a DC voltage, and generate a reset signal according to the off time of the power line; a dimming voltage generator, used to generate a dimming voltage according to a count of the switching sensing signal; and a phase-controlled non-overlapping driver, used to generate a high side driving signal and a low side driving signal for delivering a lamp current according to the dimming voltage, wherein the dimming voltage is used to generate a phase, and the phase is used to generate the lamp current. | 11-04-2010 |
| 20100277103 | LED DIMMER DEVICE ADAPTED FOR USE IN DIMMER - A LED dimmer device for use in dimmer is provided. The LED dimmer device includes rectifier, voltage boost device, pre-voltage detection circuit and after-voltage detection circuit adapted for detect voltage, master chip adapted for driving circuit and elements to work, elementary transformer and secondary transformer adapter for changing voltage, secondary rectifier adapted for rectifying and secondary filter capacitance circuit adapter for filtering, and secondary switch tube. The rectifier is adapted for transforming alternating current into direct current. The voltage boost device includes a metal oxide semiconductor field effect transistor used to make dimmer entering into a normal edge state. The master chip includes integrated comparing element used to compare voltage. The secondary switch tube is used to driving elementary transformer and secondary transformer, secondary rectifier, secondary filter capacitance circuit so as to drive LED power supply to illuminate. | 11-04-2010 |
| 20100283411 | LIGHT EMITTING DIODE DRIVING DEVICE AND METHOD THEREOF - A light emitting diode (LED) driving device and an LED driving method thereof are provided. The LED driving device includes a voltage generator, a circuit and a compensation circuit. The voltage generator is used to provide a positive voltage and a negative voltage, and the circuit is coupled to the positive voltage and the negative voltage. Herein, the circuit includes a load and an LED which are coupled to each other in series. The compensation circuit is used to sense voltages of two ends of the load, so as to generate a compensation signal and adjust the positive voltage and the negative voltage through the compensation signal. Therefore, voltage stress of the LED driving device is reduced by using the provided positive voltage and the provided negative voltage. | 11-11-2010 |
| 20100283412 | "Lip Light" Automatically Controlled by the Position of the Head - A lighting device for helmet comprises a helmet including an arm to which are fixed a microphone and a lamp, called “lip light”, lighting with at least one lighting level. The device comprises a head tracking system comprising a computer for measuring and collecting data concerning the attitude of the helmet in motion and its position in space. Lamp activation means are automatically controlled by positions calculated by the computer so that the lip light lights, with one of its lighting levels, when it is oriented in a direction contained within a predefined area. | 11-11-2010 |
| 20100289429 | METHODS OF AND DRIVING UNITS FOR DRIVING A GAS DISCHARGE LAMP - Methods of driving a gas discharge lamp ( | 11-18-2010 |
| 20100289430 | Universal Lighting Source Controller with Integral Power Metering - A universal lighting source controller including integral power metering for use with substantially all light source types including fluorescent, incandescent, magnetic low voltage, electronic low voltage, light emitting diode (“LED”), high density discharge (“HID”), neon, and cold cathode. The lighting source controller includes a line voltage dimming circuit that can control the intensity of light sources in a lighting circuit and measures the actual amount of power consumed by the light sources. The line voltage dimming circuit includes a triac circuit for controlling this intensity and current and voltage detection circuits for measuring the power consumption. The lighting source controller can also include low voltage dimming circuits to provide a control signal to light sources having electronic or magnetic dimming ballasts to set the intensity of these light sources. | 11-18-2010 |
| 20100289431 | Dimming Control Method for Display - The present disclosure provides a dimming control method for a display having a light-emitting device which includes: a first light-emitting body including an active layer generating a first light by recombination of electrons and holes; and a second light-emitting body excited by the first light and emitting a second light having a longer wavelength than the first light, the dimming control method including: controlling the power which will be supplied to the light-emitting device according to a dimming request; and adjusting the brightness of the display according to the controlled power using the second light-emitting body containing a first fluorescent material having a characteristic that chromaticity coordinates are shifted in a first direction according to the power control and a second fluorescent material having a characteristic that chromaticity coordinates are shifted in a second direction opposite to the first direction according to the power control. | 11-18-2010 |
| 20100295477 | METHOD FOR OPERATING A GAS DISCHARGE LAMP AND A GAS DISCHARGE LAMP DRIVER SYSTEM - In a method and circuit for operating a gas discharge lamp, the physical processes occurring in the gas discharge lamp are determined in order to control the behavior, and thus the light output, of the gas discharge lamp. Thereto, the method comprises the steps of, and the circuit comprises means for, providing an operating current to the gas discharge lamp and determining an operating parameter of the gas discharge lamp. Based on the determined operating parameter a value of a physical lamp parameter of the gas discharge lamp is determined. Using the determined value of the physical lamp parameter and a corresponding mathematical model of a physical process occurring in the gas discharge lamp an operating state of the gas discharge lamp is estimated. Using the model, which is based on the physical principles of the processes occurring in the gas discharge lamp, it is possible to determine the physical state of the gas discharge lamp. Consequently the operating current supplied to the gas discharge lamp may be controlled based on the determined operating state of the gas discharge lamp. | 11-25-2010 |
| 20100295478 | LED DRIVING CIRCUIT - The present invention provides a LED driving circuit, which is adapted to be coupled to a power supply via a phase control dimmer. The driving circuit comprises a power switch unit and a control unit, wherein the control unit comprises a first signal sampling module, a frequency converting module, a feedback module and a PWM module, the first signal sampling module being configured to sample a first signal and to provide the first signal to the frequency converting module; the frequency converting module being configured to generate a second signal in response to the first signal and to provide the second signal to the PWM module; and the feedback module being configured to sample a third signal and to provide the third signal to the PWM module; the PWM module being configured to generate a fourth signal in response to the second signal and the third signal, so as to control the output current of the power switch unit, the frequency of the fourth signal being determined by the second signal and the duty cycle of the fourth signal being determined by the third signal. | 11-25-2010 |
| 20100295479 | Illumination apparatus - An illumination apparatus includes a lamp load; a lighting circuit unit for turning on the lamp load; a sensor unit; an amplifier circuit unit for; a control unit for controlling the lighting circuit unit to turn on or off the lamp load depending on presence or absence of a human body; and a power supply unit. The control unit determines that a human body is present when a voltage of the. amplified detection signal exceeds a first threshold voltage while the lighting circuit unit is not operated and the lamp load is turned off, and determines that a human body is present if a voltage of the amplified detection signal exceeds a second threshold voltage while the lighting circuit unit is operated and the lamp load is turned on, a magnitude of the second threshold voltage being set to be higher than a magnitude of the first threshold voltage. | 11-25-2010 |
| 20100295480 | Method for the Operation of and Circuit Arrangement for Light Sources - A method for the closed-loop control of the operation of a light source which is supplied with power by a DC/DC voltage converter, a manipulated variable being regulated by a setpoint value for an operational parameter of the DC/DC voltage converter being input, wherein the method comprises the steps of: increasing the switching frequency of the DC/DC voltage converter by an increase value prior to rapid changes in the setpoint value; waiting for a retention time; setting the new setpoint value; waiting for the end of a total retention time; and lowering the switching frequency of the DC/DC voltage converter by the increase value. | 11-25-2010 |
| 20100301775 | Gradual Power Reduction Circuit - Systems and methods to gradually reduce power to a load are disclosed. A method includes initializing a control circuit that is configured to transition from an initial state to a steady state. A first portion of an AC power cycle that is received at the input terminal is selectively blocked from passing to a load terminal. A second portion of the AC power cycle is selectively passed to the load terminal based on an output of the control circuit. | 12-02-2010 |
| 20100308747 | PULSE WIDTH MODULATION (PWM) CLOSED LOOP LED CURRENT DRIVER IN AN EMBEDDED SYSTEM - Methods and systems for providing stable and accurate low noise DC reference voltage are described. In the described embodiments, a feedback controlled DC reference voltage supply provides a stable and well controlled sense current. The sense current is in turn used to produce a stable and well controlled light output from a light emitting diode (LED). | 12-09-2010 |
| 20100308748 | DEVICE DRIVER PROVIDING COMPENSATION FOR AGING - Driving circuits are provided that compensate for devices having characteristics that change with age. A correction circuit has a reference device having an output that changes with age in a known manner over a time span similar to the expected lifetime of the driven device. The output of reference device provides an indication of the current age of driven device. | 12-09-2010 |
| 20100308749 | AC Power Line Controlled Light Emitting Device Dimming Circuit and Method Thereof - The present invention discloses an AC power line controlled light emitting device dimming circuit and a method thereof. The AC power line controlled light emitting device dimming circuit includes: a light emitting device driver circuit for controlling current through a light emitting device, wherein the light emitting device is current-controlled; and a level adjustment circuit for detecting power-OFF of an AC power switch and generating a corresponding level adjustment signal which is transmitted to the light emitting device driver circuit to control the current through the light emitting device accordingly. | 12-09-2010 |
| 20100308750 | CONSTANT CURRENT DRIVER CIRCUIT WITH VOLTAGE COMPENSATED CURRENT SENSE MIRROR - A current sensing circuit for sensing the current provided to LEDs by a constant current power source includes a resistive shunt in series with the load and a current mirror having a first leg connected to a first terminal of the resistive shunt and a second leg connected to a second terminal of the resistive shunt. Both legs of the current mirror are also connected to ground. The first leg provides a reference signal to the second leg, and the second leg uses the reference signal and a voltage at the second terminal of the resistive shunt to provide a ground referenced output signal indicative of the current provided to the LEDs. | 12-09-2010 |
| 20100315022 | Handheld Illuminating Torch - A handheld torch which comprises a cylindrical body that has a top and a bottom. The body is configured to be grasped by a person and is preferably made of wood. The torch includes a window portion configured to extend at least partially around the body and one or more light sources positioned within the window portion. The torch includes a power source that is coupled to the light source, where the power source located within the body. The torch includes circuitry within the body, in which the circuitry is coupled to the power source and the light source. The light source produces light which illuminates through the window portion when the light source is energized. | 12-16-2010 |
| 20100320938 | METHOD OF DRIVING A GAS-DISCHARGE LAMP - The invention describes a method of driving a gas-discharge lamp ( | 12-23-2010 |
| 20100327773 | METHOD AND SYSTEM FOR DIMMING AN OFFLINE LED DRIVER - An apparatus and method for dimming a light emitting diode (LED) driver. The apparatus includes a triode alternating current (TRIAC) dimmer and an LED driver receiving an input voltage from an output of the TRIAC dimmer so that the state of the LED driver is controlled by the TRIAC dimmer. The LED driver includes an active damping circuit configured for damping, upon detecting a rising edge of a bridge rectified input voltage, resonance caused by the TRIAC dimmer and the LED driver for a fixed period of time. | 12-30-2010 |
| 20100327774 | Housing Illumination for Portable Electronic Devices - Systems, devices and methods for electronically marking a housing of a portable electronic device are disclosed. When the housing of the portable electronic device is electronically marked, the marking(s) are non-permanent and able to be rapidly and dynamically changed. The marked housing can provide notification or guidance to a user. The housing can also be electronically marked in a manner that facilitates low power operation of the portable electronic device. The portable electronic device can, for example, be a mobile phone (e.g., cell phone), a personal digital assistant (PDA), a computer peripheral (e.g., mouse), a portable media player, and the like. | 12-30-2010 |
| 20100327775 | HIGH PRESSURE DISCHARGE LAMP LIGHTING DEVICE AND LIGHTING FIXTURE USING THE SAME - A high pressure discharge lamp lighting device comprising an inverter, an igniter, a controller, a pulse voltage detection circuit, and the starting pulse voltage regulation circuit. The inverter applies a lighting voltage to a high pressure discharge lamp. The controller applies the starting pulse voltage generated by the igniter to the high pressure discharge lamp. The pulse voltage detection circuit is configured to detect a voltage indicative of the starting pulse voltage to output a detection signal. The starting pulse voltage regulation circuit is configured to regulate the starting pulse voltage to a desired value of the starting pulse voltage on the basis of the detection signal. The pulse voltage detection circuit is configured to detect either one of the voltage developed in the specified circuit component of the igniter and the starting pulse voltage as the voltage indicative of the voltage indicative of the starting pulse voltage. | 12-30-2010 |
| 20100327776 | HIGH PRESSURE DISCHARGE LAMP LIGHTING DEVICE AND LIGHTING FIXTURE USING THE SAME - A high pressure discharge lamp lighting device in this invention comprises a converter, an inverter, an igniter, a controller, and a pulse voltage detection circuit. The converter outputs the direct current voltage. The inverter converts the direct current voltage into the lighting voltage which is alternating current voltage, and applies the lighting voltage to the high pressure discharge lamp through an output terminal. The igniter is configured to output the pulse voltage superimposed on the lighting voltage, whereby the starting voltage is applied to the high pressure discharge lamp. The controller is configured to control the igniter to allow the igniter to superimpose the pulse voltage on the lighting voltage. The pulse voltage detection circuit detects the starting voltage to output the detection signal. The starting voltage regulation circuit regulates the starting voltage to the desired voltage value of the voltage on the basis of the detection signal. | 12-30-2010 |
| 20110001439 | DRIVER ARRANGEMENT FOR LIGHT EMITTING DIODES - A driver arrangement for LEDs may include a PWM controller to deliver a feed voltage between an output line and a ground output line, said controller having a pin, a current regulator to regulate the feed current, a switch to connect said pin to a scaled-down version of the voltage on the first output line, and a control line to receive a signal to produce dimming, said control line coupled to said regulator and said switch to couple said regulator to a reference voltage and control switching, whereby: in one of the levels of a PWM control signal, said regulator interrupts said feed current, the voltage on said ground output line is floating, and in the other levels, said regulator is coupled to said reference voltage, said switch disconnects said pin from said voltage on the output line and the voltage on said ground output line is regulated. | 01-06-2011 |
| 20110001440 | LIGHT COLOR TUNABILITY - The application relates to setting color point and light intensity. By controlling the phase as well as the amplitudes of a driving voltage for a lighting device, the color point as well as the light intensity of a lighting device may be set. | 01-06-2011 |
| 20110006705 | VOLTAGE MULTIPLE DIMMING CONTROL APPARATUS - The present invention discloses a control apparatus, which not only accepts multiple dimming control signals, but also combines the signals in analog manner. By means of this, an inevitable analog to digital converter in a conventional voltage multiple dimming control apparatus can be saved without hurting the performance of generation of pulse width modulation signals. Compared with the conventional arts, the present invention further exhibits reduction in view of chip size and power consumption. | 01-13-2011 |
| 20110006706 | LATCH-OFF OF REAL TIME SYNCHRONOUS RECTIFICATION FOR LIGHT LOAD CONTROL - The present invention discloses a light load control circuit and the method accordingly where the synchronous rectification is latched off selectively according to the gate voltage of the synchronous rectifier. | 01-13-2011 |
| 20110006707 | DEVICE FOR GENERATING LIGHT WITH A VARIABLE COLOR - An illumination system ( | 01-13-2011 |
| 20110012534 | PORTABLE LIGHTING DEVICES - A portable lighting device and method of operating the portable lighting device are disclosed. The portable lighting device is configured to operate using a portable source of power having a plurality of modes of operation. The portable lighting device comprises a main power circuit including a light source, an inertial sensor having a plurality of signal outputs, and a controller electrically connected to the outputs of the inertial sensor and the main power circuit in a manner to permit the controller to enter into a new mode of operation based on signals received from the outputs of the inertial sensor. One method of operating the portable lighting device is by positioning the portable lighting device to one of a plurality of predetermined positions to enter into one of a plurality of modes of operation. Each of the plurality of predetermined positions is associated with one of the plurality of modes of operation. | 01-20-2011 |
| 20110012535 | PORTABLE LIGHTING DEVICES - A portable lighting device and method of operating the portable lighting device are disclosed. The portable lighting device is configured to operate using a portable source of power having a plurality of modes of operation. The portable lighting device comprises a main power circuit including a light source, an inertial sensor having a plurality of signal outputs, and a controller electrically connected to the outputs of the inertial sensor and the main power circuit in a manner to permit the controller to enter into a new mode of operation based on signals received from the outputs of the inertial sensor. One method of operating the portable lighting device is by positioning the portable lighting device to one of a plurality of predetermined positions to enter into one of a plurality of modes of operation. Each of the plurality of predetermined positions is associated with one of the plurality of modes of operation. | 01-20-2011 |
| 20110012536 | ELECTRONIC BALLAST WITH DIMMING CONTROL FROM POWER LINE SENSING - The present invention discloses an electronic ballast with dimming control from power line sensing for a fluorescent lamp, comprising: a control voltage generator, used to generate a control voltage according to a switching count of a power line; an oscillator, used to generate an oscillating signal, wherein the oscillating signal is of a fixed frequency and has a rising voltage portion and a falling voltage portion; and a comparator, used to generate a high side gating signal according to voltage comparison of the oscillating signal and the control voltage. | 01-20-2011 |
| 20110012537 | Driver circuit and method for driving load circuit - The present invention discloses a driver circuit and a method for driving a load circuit. The driver circuit includes: a primary side circuit receiving rectified AC power; a transformer coupled to the primary side circuit and converting a primary voltage to a secondary voltage which is supplied to a load circuit; and a secondary side circuit coupled to the transformer, the secondary side circuit detecting current flowing through the load circuit and feedback controlling the primary side circuit accordingly. | 01-20-2011 |
| 20110012538 | LATCH-OFF OF SYNCHRONOUS RECTIFICATION FOR LIGHT LOAD CONTROL - Disclosed is a light load control circuit and the method accordingly where the synchronous rectification is latched off when the light load condition is detected for several successive cycles. | 01-20-2011 |
| 20110018467 | INTELLIGENT CONTROL MODULE AND METHOD FOR LIGHTING LAMP - An intelligent control module for lighting lamp is applied to a switch unit, a lamp control interface and a lamp. The intelligent control module for lighting lamp includes a dimming signal output sub-module and a display sub-module electrically connected to the dimming signal output sub-module. The dimming signal output sub-module includes a dimming microprocessor. The display sub-module includes a display microprocessor and a display unit electrically connected to the display microprocessor. The dimming signal output sub-module and the display sub-module are electrically connected to the switch unit. A dimming and timing signal is sent by the dimming microprocessor according to a switching-on time and duration of the switch unit and provided for controlling the lamp control interface to drive the lamp. A display signal is transmitted by the display microprocessor to drive the display unit according to the switching-on time and duration of the switch unit. | 01-27-2011 |
| 20110025233 | Method and Apparatus For Reduction of Excess Current During Initial Firing of Arc Lamp Circuits - Arc lamps, including low-pressure arc lamps, are coupled to drive circuitry operable to provide drive signals that reduce or eliminate excess current when the lamp arc is struck. The drive circuitry controls the rate at which a lamp can fire by actively controlling the rate the voltage pulse increases. Prior to enabling the drive pulse burst, the frequency is shifted only part of the way towards the normal operating frequency in a single step, then allowed to approach the normal operating frequency in a fashion that is selected based at least in part upon the specific type of lamp being used. Typically, the rate of change of the frequency is linear. | 02-03-2011 |
| 20110025234 | LIGHT-EMITTING-ELEMENT DRIVING CIRCUIT - A light-emitting-element driving circuit is provided which comprises a voltage boosting circuit unit which supplies a boosted voltage to a light-emitting element, a current circuit unit which drives the light-emitting element with a current, a normal feedback loop path through which a voltage of the light-emitting element is input as a feedback voltage to the voltage boosting circuit unit, a backup feedback loop path through which a voltage of the light-emitting element is input as the feedback voltage to the voltage boosting circuit unit, an abnormality detection circuit unit which compares the feedback voltage which is input through the normal feedback loop path to the voltage boosting circuit unit and a predetermined determination voltage, to detect abnormality, and a switching circuit which switches from the normal feedback loop path to the backup feedback loop path when the abnormality detection circuit unit has detected the abnormality. | 02-03-2011 |
| 20110031899 | DIMMABLE LED DEVICE WITH LOW RIPPLE CURRENT AND DRIVING CIRCUIT THEREOF - A dimmable light emitting diode (LED) device with low ripple current includes a LED module, a phase dimmer, a voltage converting module, a driving module and a feedback module. The flyback converter of the voltage converting module adds a secondary forward winding connecting to a phase cut-off detector to provide a detecting voltage in proportion to current level of the output current across the LED module. | 02-10-2011 |
| 20110031900 | CONTROLLER AND METHOD OF OPERATING A CONTROLLER - A controller for controlling a power generator circuit, and a method for operation such a controller, is disclosed. The invention is particularly suited to LED current generators. The current generator may be switched off to conserve power when not required for any LED circuits. The method relates to determining the time at which the controller is required to provide power, current or voltage, and to adjust the timing of switching-on of the controller, in order to ensure that power, current or voltage is available for the load when required. | 02-10-2011 |
| 20110031901 | LAMP HAVING SELF-REGULATED LIGHTING - A portable electric lamp comprises a lighting module with LEDs and user control means connected to an electronic control circuit to define different lighting modes. An optic sensor is housed in the casing near the light-emitting diode LED to transmit to the control circuit a signal representative of the lighting induced by the lamp to automatically regulate the power of the LED according to a predefined threshold. | 02-10-2011 |
| 20110031902 | INVERTER DEVICE - An object of the present invention is to provide an inverter device that can readily prevent flickering on a light emitting apparatus even when the light emission level thereof lowers. To achieve the object, an inverter device according to the present invention includes a rectifier ( | 02-10-2011 |
| 20110037416 | POWER CONVERSION APPARATUS, DISCHARGE LAMP BALLAST AND HEADLIGHT BALLAST - Power conversion apparatus includes a converter circuit, a control circuit, a simulation circuit and a sense circuit. The converter circuit includes a magnetic device for power conversion and a switching device, and is configured to convert power from a power supply into direct current power. The control circuit is configured to supply the converter circuit with a high frequency signal for turning the switching device on and off. The simulation circuit is configured to produce a simulation signal that simulates state or change of magnetic flux of the magnetic device. The sense circuit is configured to produce a signal which corresponds to at least one of the input and output of the converter circuit and is superposed on the simulation signal to form a superposed signal. The control circuit defines an on-period of the high frequency signal based on the superposed signal. | 02-17-2011 |
| 20110037417 | Zero power lighting control device and method - The present invention is directed to a lighting control system with a motion sensor unit that electrically couples to a load circuit through a latching relay or load controller for turning on and off lights. The motion sensor unit is configured to power down to draw zero power after a time delay, when motion is longer detected within the work space by the motion sensor unit. The lighting control system further includes a control circuit that reinitiates or turns the motion sensor back on through a switch device. | 02-17-2011 |
| 20110037418 | LED DEVICE - An LED device is provided. The LED device implements an efficient dimming operation. The LED device includes a triac dimmer for receiving an AC voltage and adjusting an angle of the AC voltage, a ballast for receiving the AC voltage from the triac dimmer and generating an AC voltage pulse, a bridge diode unit for generating a DC voltage pulse using the AC voltage pulse, an LED for receiving a DC current and emitting a light, an LED drive controller for receiving a dimming signal and controlling the DC current passing through the LED, and a dimming signal generator for receiving the AC voltage pulse from the ballast and generating a pulsating dimming signal for compensating an output of the triac dimmer and providing the dimming signal to the LED drive controller. | 02-17-2011 |
| 20110043139 | LED DRIVING CIRCUIT AND DRIVING CONTROLLER FOR CONTROLLING THE SAME - A driving controller for driving a load is disclosed. The driving circuit includes a driving power supply and the driving controller. The driving power supply provides a first power source to the load. The controller is coupled to a second power source to receive an electric power for operating. The controller controls the amount of the electric power to the load when operating in a first mode and stops the driving power supply from providing the electric power to the load when operating in a second mode. The controller operates exclusively in the first mode before the driving power supply provides the first power source to the load. | 02-24-2011 |
| 20110043140 | CHARGE PUMP CIRCUIT WITH CURRENT DETECTING AND METHOD THEREOF - The present invention relates to a charge pump circuit with current detecting and a method thereof. The current detecting charge pump circuit includes a controlled current source, a load circuit which electrically connects to the charge pump circuit unit, and is driven by the charge pump circuit unit to generate a load current. A detecting circuit unit electrically connects to the load circuit, and produces a feedback signal according to the load circuit. A feedback circuit unit which electrically connects to the detecting circuit unit, receives the feedback signal, and adjusts a current of the controlled current source according to the feedback signal. The charge pump circuit also includes a protecting circuit unit which is able to detect feedback signal to protect the circuit according to the feedback signal. | 02-24-2011 |
| 20110050133 | LED Lamps with Packaging as a Kit - Apparatus and methods for re-usable packaging of a lighting product include providing a container body to receive an electric lamp and a cover that can be repeatedly sealed and unsealed to the container. In an illustrative example, the lamp may be an AC LED lamp substantially located within the container body by a lamp locating feature on a bottom interior surface of the container body. In some embodiments, an interior surface of the lid may provide a projecting feature configured to positively retain the lamp in the lamp locating feature when the lid is installed on the container body. In various embodiments, the container body and the container lid may advantageously provide a protective package that may be sold as a kit, and may further provide a durable and reusable general purpose container system that may, for example, substantially reduce an environmental footprint associated with lamp packaging. | 03-03-2011 |
| 20110057580 | Control of Delivery of Current Through One or More Discharge Lamps - Systems and techniques to control of delivery of current through one or more lamps include, in at least one aspect, a method comprising: receiving an electric signal from a resistor in a circuit, where the resistor is selected based on a lamp; determining that a value associated with the electric signal falls in a preset range of values, the preset range having one or more parameters that correspond to the lamp; and outputting the one or more parameters to operate the lamp. | 03-10-2011 |
| 20110062892 | DRIVING DEVICE FOR A LIGHT EMITTING DIODE CIRCUIT AND RELATED LIGHTING DEVICE - A driving device for an LED circuit includes a power receiving terminal, a capacitor, and a light adjusting unit. The power receiving terminal is coupled to a switch for receiving a DC power source that supplies for the LED circuit and the driving device via the switch. The capacitor is coupled to the power receiving terminal, and is utilized for storing energy. The light adjusting unit is coupled to the power receiving terminal and the capacitor, and is utilized for generating a control signal according the status of the switch when a voltage on the capacitor decreases and does not decrease below a first threshold voltage, for adjusting light intensity of the LED circuit. | 03-17-2011 |
| 20110062893 | LIGHTING DEVICE, LIGHTING CONTROL DEVICE, AND PROJECTOR - A lighting device which supplies power to an electrode of a discharge lamp to turn on the discharge lamp, includes: a converting circuit which converts inputted direct current into alternating current; a pulse generating circuit which produces a high-voltage pulse from the alternating current received from the converting circuit and applies the high-voltage pulse to the electrode; and a trigger circuit which is disposed between the converting circuit and causes the pulse generating circuit to apply the high-voltage pulse to the electrode, wherein the trigger circuit allows the pulse generating circuit to apply the high-voltage pulse to the electrode in accordance with a drive frequency of the converting circuit. | 03-17-2011 |
| 20110062894 | COLD CATHODE FLUORESCENT LAMP DRIVING CIRCUITS AND ASSOCIATED METHODS OF CONTROL - Methods and circuits for CCFL driving circuit control are disclosed according to various embodiments of the present disclosure. In certain embodiments, the methods and circuits for CCFL driving circuit control provide a control signal for regulating both the duty ratio and frequency of the switching control signal that controls the CCFL driving circuit. External components for control loop compensation and frequency sweeping rate, and/or striking frequency setting may also be utilized. | 03-17-2011 |
| 20110068710 | ADJUSTING DEVICE FOR REGULATING THE ILLUMINATION OF A LAMP AND THE METHOD THEREOF - The present invention comprises a rectifier-filter circuit, an active power factor correction (PFC), an oscillating circuit, a boost circuit, a tube circuit, an internal power, a sampling circuit, a micro controller unit (MCU), a detecting circuit, and a power switch to regulate the brightness of a lamp. Wherein, a parameter set in the MCU would accordingly help the MCU trigger the consecutive oscillating switching time and frequency. The sampling circuit acquires the data of the consecutive switching time and frequency and sends the MCU the data to determine whether to correspondingly send a control signal for starting the oscillating circuit and starting the frequency, pulse width, number of channels of the oscillating circuit. Therefore, the present invention is accomplished through the control signal of the MCU passing through the oscillating circuit and the tube circuit, conducing to a convenient adjustment, an energy saving competence, and the long-lived lamp and switch. | 03-24-2011 |
| 20110068711 | METHODS AND APPARATUS FOR CEILING MOUNTED SYSTEMS - Methods and apparatus for ceiling suspended systems according to various aspects of the present invention include a modular platform for supporting and supplying multiple devices. A wire way bar may facilitate connection and support for the devices, such as light sources and other systems. | 03-24-2011 |
| 20110068712 | POWER SUPPLY AND METHOD FOR ELECTRIC LIGHTING DEVICE - Disclosed herein are a power control system ( | 03-24-2011 |
| 20110068713 | METHOD AND CIRCUIT ARRANGEMENT FOR CYCLE-BY-CYCLE CONTROL OF A LED CURRENT FLOWING THROUGH A LED CIRCUIT ARRANGEMENT, AND ASSOCIATED CIRCUIT COMPOSITION AND LIGHTING SYSTEM - The invention provides a method for cycle-by-cycle control of a LED current (ILED) flowing through a LED circuit arrangement (LEDCIRC) at a mean LED current level. The method comprises a) establishing a converter current (IL), b) establishing an oscillation of the converter current (IL) between substantially a valley current level and substantially a peak current level, c) feeding the LED circuit arrangement (LEDCIRC) with the converter current (IL) as the LED current during a part of an oscillation cycle of the oscillation of the converter current, d) determining a current level correction for compensating a current level error between an integral over an oscillation cycle of the LED current and a reference, the reference being representative of the mean LED current level, and e) adjusting at least one of the valley current level and the peak current level with the current level correction for use in a successive cycle of the oscillation of the converter current. The invention also provides a circuit arrangement operable for using the method, a LED driver IC using the circuit arrangement, a circuit composition with at least one LED and the circuit arrangement, and a lighting system with the circuit composition. | 03-24-2011 |
| 20110068714 | HIGH PRESSURE DISCHARGE LAMP LIGHTING DEVICE AND ILLUMINATION INSTRUMENT - In an event of switching a DC output voltage of a boost chopper circuit from a first DC output voltage to a second DC output voltage, a boost chopper control circuit operates a boost chopper circuit intermittently. Therefore, a stop period of the boost chopper circuit is shortened as compared with a case where the boost chopper control circuit does not operate the boost chopper circuit intermittently. As a result, it becomes possible to supply a control power also when the DC output voltage of the boost chopper circuit is switched at a starting time of a high pressure discharge lamp while avoiding size and cost increases of a power supply circuit that supplies the control power. | 03-24-2011 |
| 20110074314 | SYSTEM AND METHOD FOR CONTROLLING ELECTRICAL POWER OF LED AND LED PROJECTOR HAVING THE SAME - A method for controlling electrical power of light emission diodes (LED) is provided. The above method comprises steps of providing a supply voltage to the LED driver; providing a driving current to the LED by the LED driver; obtaining an operating voltage of the LED; and adjusting the supply voltage according to the operating voltage of the LED. | 03-31-2011 |
| 20110080119 | CIRCUITS AND METHODS FOR DRIVING LIGHT SOURCES - A circuit for driving a light source, e.g., an LED light source, includes a converter, a sensor, and a controller. The converter converts an input voltage to an output voltage across the LED light source based upon a driving signal. A duty cycle of the driving signal determines an average current flowing through the LED light source. The sensor is selectively coupled to and decoupled from the converter based upon the driving signal. The sensor generates a sense voltage indicative of a current flowing through the LED light source when the sensor is coupled to the converter. The controller is coupled to the converter and sensor. The controller compares the sense voltage to a reference voltage indicative of a predetermined average current through the LED light source to generate a compensation signal and generates the driving signal based upon the compensation signal. The duty cycle of the driving signal is adjusted based upon the compensation signal to adjust the average current flowing through the LED light source to the predetermined average current. | 04-07-2011 |
| 20110089867 | HIGH EFFICIENCY LOW POWER CAPACITOR CHARGED DC DRIVER - A high efficiency low power DC driver apparatus is presented for powering a light source, with a capacitive divider circuit receiving an AC input and providing a divided AC output, a rectifier provide a DC output below ten watts, output terminals coupleable to one or more light sources, and a linear regulator coupled in series with the light source to regulate a drive current flowing through the series circuit. | 04-21-2011 |
| 20110101886 | LOAD CONTROL CIRCUIT - A switch device controls a voltage applied to a load element according to an electric power supply from a power source. A driver circuit controls activation and deactivation of the switch device. A circuit portion sets a duty ratio and output the duty ratio to the driver circuit for causing the driver circuit to activate the switch device according to the duty ratio to control a voltage applied to the load element. The circuit portion sets the duty ratio according to a duty ratio characteristic curve. In the duty ratio characteristic curve, the duty ratio decreases gradually with increase in a voltage of the power source, and decrease in the duty ratio with increase in the voltage of the power source becomes small gradually. | 05-05-2011 |
| 20110101887 | METHOD OF VIEWING A SUBJECT - A method and apparatus are provided for viewing a subject. The method includes the steps of providing a predetermined visual contrast among image details of the subject and maintaining the visual contrast for a predetermined time period of less than 100 milliseconds. | 05-05-2011 |
| 20110109249 | DIMMABLE LED LAMP AND DIMMABLE LED LIGHTING APPARATUS - A dimmable light-emitting diode (LED) lamp and a dimmable LED lighting apparatus thereof are provided. The dimmable LED lamp includes a bridge rectifier, a toggle detector, a sustain voltage supply circuit, a counter, an LED light source, and an LED lighting driver. The bridge rectifier receives a source alternating current (AC) voltage through a wall switch and provides a rectified direct current (DC) voltage. The toggle detector monitors a toggle action of the wall switch. The sustain voltage supply circuit provides a sustain voltage. The counter receives the sustain voltage for operation. Moreover, the counter stores and provides an counting value that changes when the toggle detector detects the toggle action. The LED lighting driver converts the rectified DC voltage to a constant current to drive the LED light source. The LED lighting driver also provides multi-level dimming to the LED light source according to the counting value. | 05-12-2011 |
| 20110115412 | POWER CONVERTER FOR AN LED ASSEMBLY AND LIGHTING APPLICATION - The present invention relates to a power converter for an LED assembly, the power converter comprising—a switched mode power supply arranged to power the LED assembly, an AC/DC converter arranged to provide a DC supply voltage to the switched mode power supply, a control unit arranged to receive an input signal representing a required load voltage for powering the LED assembly, the control unit being arranged to control the AC/DC converter based on the input signal. | 05-19-2011 |
| 20110121759 | METHOD AND GAS DISCHARGE LAMP WITH FILTER TO CONTROL CHROMATICITY DRIFT DURING DIMMING - Techniques are disclosed that allow for the use of metal halide lamps in dimming applications, as well as other discharge lamps susceptible to dimming-induced chromaticity drift. Examination of such lamps reveals that some of the spectral changes that cause chromaticity drift during dimming are localized in narrow band regions of the spectrum, and lamp emission in these regions is enhanced (either increased or decreased) relative to the rest of the spectrum. Selective filtering of the enhanced emission caused by dimming can be used to reduce chromaticity shift. For instance, a filter deposited on and/or integrated into a lamp component (such as the arc tube, shroud, and/or outer jacket) operates to block transmission of those regions of the spectrum. | 05-26-2011 |
| 20110127929 | LED ILLUMINATION SYSTEM WITH A POWER SAVING FEATURE - An LED illumination system includes a control circuit having a timing unit, a control unit and a PWM signal generating unit. The timing unit divides an operating period of an LED lamp into a plurality of time segments, and outputs a clock signal at a start of each time segment to the control unit. The control unit outputs different controlling signals corresponding to the clock signals to the PWM signal generating unit, which in turn generates different PWM signals with different duty cycles. A constant current circuit electrically connects the control circuit to the LED lamp. The constant current circuit outputs different electric currents to the LED lamp according to the PWM signals, to thereby control the LED lamp to emit light having different light intensities at the various time segments of the operating period. | 06-02-2011 |
| 20110133673 | LED DRIVING CIRCUIT HAVING ERROR DETECTION FUNCTION - There is provided an LED driving circuit. An LED driving circuit according to an aspect of the invention may include: a shift register separating dimming data and control data from serial peripheral interface (SPI) data and outputting the dimming data and the control data in predetermine data units; a scan register generating scan data according to the control data from the shift register; a first error detection unit detecting an error in the dimming data from the shift register; a second error detection unit detecting an error in the scan data from the scan register; and a logic operation unit performing an OR operation on an output signal from the first error detection unit and an output signal from the second error detection unit. | 06-09-2011 |
| 20110140637 | LED ILLUMINATION SYSTEM WITH A POWER SAVING FEATURE - An LED illumination system includes a control circuit having a timing unit, a control unit, a PWM signal generating unit and a micro-programmed control unit (MCU). The timing unit divides an operating period of an LED lamp into different time segments, and outputs clock signals. The control unit outputs different controlling signals corresponding to the clock signals to the PWM signal generating unit, which in turn generates different PWM signals with different duty cycles. A constant current circuit electrically connects the control circuit and outputs different electric currents to make the LED lamp emit light having different light intensities at the different time segments. The MCU is at an outside of the LED lamp and sets a program to control the timing unit, the control unit and the PWM signal generating unit. | 06-16-2011 |
| 20110148325 | POWER SUPPLY FOR LAMPS, PARTICULARLY FOR LED-MR16 LAMPS - There is described a power supply for lamps, particularly for LED-MR16 lamps; the power supply receives an alternating voltage, particularly provided by an electronic transformer, at the input between first and second input terminals. The input alternating voltage has a high frequency component and the power supply comprises rectifier means of said input alternating voltage and at least one capacitor connected to the output of said rectifier means; the voltage at the ends of said capacitor is adapted to supply the lamp. The power supply includes a capacitive circuit arranged between the first and second terminals and adapted to be charged by the negative half-wave of the high frequency component of the input alternating voltage; the capacitive circuit adapted to discharge to the capacitor in the presence of the positive half-wave of the high frequency component of the input alternating voltage. | 06-23-2011 |
| 20110148326 | TWO-WIRED LED LIGHT ADJUSTING SYSTEM - A two-wired LED light adjusting system, for controlling the luminance adjustment for a LED lamp module. The light adjusting circuit includes a phase modulating circuit, a LED driving circuit and a controller. The phase modulating circuit generates a phase modulating voltage. The controller detects the phase modulating voltage of various waveforms. When the controller detects the phase modulating voltage of different waveforms, the controller controls the LED driving circuit to enable the LED lamp module to emit light of different luminance according to waveforms of the phase modulating voltage. | 06-23-2011 |
| 20110163695 | POWER SUPPLY UNIT AND METHOD FOR CONTROLLING A POWER SUPPLY UNIT - A power supply unit is provided which comprises an AC/DC conversion unit with an input to which an input voltage is coupled and an output to which a DC bus voltage is coupled. The power supply unit furthermore comprises a DC bus capacitor which is coupled to the output of the AC/DC conversion unit. The power supply unit furthermore comprises at least one sub-power supply unit receiving the DC bus voltage as input for providing at least one power supply. The power supply of the at least one sub-power supply unit or part of the load is at least reduced or switched off if the input voltage falls below a predetermined threshold value. | 07-07-2011 |
| 20110169425 | SINGLE CHIP BALLAST CONTROLLER FOR STEP-DIMMING OF A FLUORESCENT LAMP - The present invention relates a single chip ballast controller for step-dimming of a fluorescent lamp, comprising: a counting circuit, used to generate a switching count by counting the instances where the supply voltage falls below a threshold voltage; a reference voltage generator, used to generate a reference voltage proportional to the switching count; and a gating signal generator, used to generate a high side driving signal and a low side driving signal according to an error voltage between the reference voltage and a current sensing voltage to regulate the current sensing voltage at the reference voltage, wherein the current sensing voltage is proportional to a lamp current flowing through the fluorescent lamp. | 07-14-2011 |
| 20110169426 | Fluorescent Lamp Power Supply - Various embodiments of a fluorescent lamp power supply are disclosed herein. In one embodiment, a power supply includes a power input connected to a pulse generator. The power supply also includes a filter connected to a variable pulse width output on the pulse generator and to the power input. The filter is adapted to substantially block at least one harmonic frequency component of the variable pulse width output and to substantially pass a fundamental frequency component of the variable pulse width output. The power supply also includes a power output connected to the filter, wherein an amplitude at the power output is related to the pulse width at the variable pulse width output. | 07-14-2011 |
| 20110169427 | CIRCUIT ARRANGEMENT AND METHOD FOR OPERATION OF A DISCHARGE LAMP - In various embodiments, a circuit arrangement may include a voltage-measuring device embodied to measure an output voltage, wherein the voltage-measuring device is embodied to provide at its output a signal which is correlated with the measured output voltage, wherein the voltage-measuring device is coupled to a control device for the purpose of transmitting said signal to the control device, and wherein the control device is embodied to vary an off-time as a function of the measured output voltage. | 07-14-2011 |
| 20110175552 | METHOD OF DRIVING A LIGHT SOURCE, METHOD OF DISPLAYING AN IMAGE USING THE SAME, AND DISPLAY APPARATUS FOR PERFORMING THE SAME - A method of driving a light source includes converting a reference luminance value of the light source to a first just noticeable difference (JND) value. The JND value represents a minimum noticeable difference between two stimuli. A target luminance value lower than the reference luminance value is determined using the first JND value. A first driving signal applied to the light source is generated using the target luminance value so that a user may not notice a luminance change when a luminance value of a light source is decreased in order to decrease power consumption of a display apparatus. | 07-21-2011 |
| 20110181205 | HALF-BRIDGE POWER CONVERTER FOR DRIVING LED BY SERIES-RESONANT CONNECTION OF INDUCTOR, INDUCTOR AND CAPACITOR - Disclosed herein is an LLC half-bridge power converter for driving an LED, which uses a CMOS timer IC having 50% duty cycle and a usable frequency range of 50 KHz through 1 MHz as a controller. In the LLC half-bridge power converter for driving an LED, the output of a rectifier is detected to operate an opto-coupler according to a soft-start set value and the opto-coupler is controlled to be turned off when the output of the rectifier exceeds a set rated voltage. The capacitance of a frequency varying condenser of the controller is varied by the opto-coupler to change the frequency of the controller so as to rapidly stabilize the output level and maintain a desired output level. | 07-28-2011 |
| 20110181206 | EMERGENCY POWER SUPPLY CIRCUIT FOR DIMMABLE ELECTRONIC BALLASTS AND RELATED METHOD - An emergency supply circuit for an electronic ballast may include: an output line to feed a supply input of the ballast; a first line to receive a mains supply signal; a second line to receive an emergency supply signal from a battery, with a converter interposed in said second line to boost said supply signal, a switch to alternatively connect said output line to said first or said second line; a controller sensitive to the absence of said mains supply signal and to the charge level of said battery, said controller to produce switching of said switch to connect said output line to said second line in the absence of said mains supply signal on said first line, whereby said output line receives said supply signal, and dimming interface circuitry to drive said dimming control input of said ballast when said output line is connected to said second feed line. | 07-28-2011 |
| 20110187286 | Switching Circuit Having Delay For Inrush Current Protection - A two-wire switching circuit can handle a large inrush current, but does not require a neutral connection or a heavy-duty mechanical switch or relay. The switching circuit comprises a mechanical air-gap switch, a first controllably conductive device (e.g., a bidirectional semiconductor switch), and a second controllably conductive device (e.g., a latching relay), which are all adapted to be coupled between an AC power source and an electrical load when the air-gap switch is in a first position. First and second delay circuits control the semiconductor switch and the latching relay to be conductive at different times after the air-gap switch is changed to the first position. Specifically, the semiconductor switch is rendered conductive before the latching relay is rendered conductive, such that the semiconductor switch conducts the large inrush current. The latching relay conducts current from the AC power source to the electrical load after the inrush current has subsided. | 08-04-2011 |
| 20110187287 | BALLAST CONFIGURED TO COMPENSATE FOR LAMP CHARACTERISTIC CHANGES - A ballast ( | 08-04-2011 |
| 20110187288 | DISCHARGE LAMP LIGHTING DEVICE - A discharge lamp lighting device capable of preventing magnetic saturation of an inductor connected with an output of an inverter. An inverter | 08-04-2011 |
| 20110187289 | LIGHT SOURCE DRIVER - A light source driver supplies a driving voltage, obtained by the multiplication of an input voltage, to a light source, especially to an LED array. The light source driver includes a power converting part switching an input power to be converted into a first power having a predetermined voltage level; and a multiplying part including at least one multiplying cell having at least one capacitor charging and discharging the first power according to the switching of the power converting part and at least one diode providing a path for transmitting the first power according to the switching of the power converting part, multiplying the first power to thereby transmit a driving power to at least one light source, and being configured as a closed loop in which the capacitor and the diode are connected to an input terminal of the power converting part through which the input power is inputted. | 08-04-2011 |
| 20110193495 | LIGHTING POWER SOURCE WITH CONTROLLED CHARGING OPERATION FOR DRIVING CAPACITOR - A lighting power source provides AC or DC power as needed to power an electric light source. A first switching element and a diode are coupled in series across output ends of a DC power source, with a second switching element coupled across the diode. An inductor forms an output loop with the diode. A driving capacitor has a first end coupled to a node between the first switching element and the diode. A charging power source is coupled to a second end of the driving capacitor and supplied with power from the DC power source. During a charging operation, a control circuit charges the driving capacitor by turning on the second switching element while maintaining the first switching element in an OFF state. During a normal operation which follows the charging operation the control circuit repeatedly turns on/off the first switching element while maintaining the second switching element in the OFF state. | 08-11-2011 |
| 20110193496 | CONTROL SYSTEMS - A lighting control system comprises an input for receiving a mains supply voltage; an output for providing an output voltage signal for powering plural lamps; a controller; a first transformer connected to the input and being for reducing the mains supply voltage to a reduced voltage; a second transformer having a secondary winding connected in series between the first transformer and the output and having a primary winding connected to the controller, the secondary and primary windings being arranged so as to induce a supplementary voltage in the secondary winding when said primary winding is energised. The controller is configured in a first phase to provide a first energising signal to the primary winding of the second transformer such as to supplement the reduced voltage provided by the first transformer, thereby to provide an output voltage signal that is greater than the reduced voltage signal; and in a second phase to short-circuit the primary winding of the second transformer, thereby to provide an output voltage signal substantially at the reduced voltage. The controller is configured in a third phase to provide a second energising signal to the primary winding of the second transformer such as to alter the reduced voltage provided by the first transformer, the second energising signal having a different voltage to the first energising signal, thereby to provide an output voltage signal in the third phase that is different to the output voltage signals provided in the first and second phases. | 08-11-2011 |
| 20110193497 | CONTROL SYSTEMS - A lighting control system comprises an input for receiving a mains supply voltage; an output for providing an output voltage signal for powering plural lamps; a controller; a first transformer connected to the input and being for reducing the mains supply voltage to a reduced voltage; a second transformer having a secondary winding connected in series between the first transformer and the output and having a primary winding connected to the controller, the secondary and primary windings being arranged so as to induce a supplementary voltage in the secondary winding when said primary winding is energised. The controller is configured in a first phase, to provide a first energising signal to the primary winding of the second transformer such as to supplement the reduced voltage provided by the first transformer, thereby to provide an output voltage signal that is greater than the reduced voltage signal and in a second phase, immediately following the first phase, to cease to provide the first energising signal to the primary winding of the second transformer, thereby to provide an output voltage signal in the second phase that is different to the output voltage signal provided in the first phase The controller includes a control input for receiving a control signal from a user, for allowing a user to configure one or more parameters of the lighting control system. | 08-11-2011 |
| 20110199024 | SINGLE CHIP BALLAST CONTROLLER CAPABLE OF PROVIDING BRIGHTNESS LEVELS OVERVIEW AND BRIGHTNESS SETTING OF A FLUORESCENT LAMP - The present invention discloses a single chip ballast controller, capable of providing brightness levels overview and brightness setting of a fluorescent lamp during power-on period, having: a switching detection circuit, used to generate a set signal, which changes from an inactive state to an active state when a supply voltage falls below a threshold voltage; a time-varying reference voltage generator, used to generate a time-varying reference voltage varying between a first level and a second level during a power-on period, wherein the time-varying reference voltage can be fixed at a level by the active state of the set signal during the power-on period; and a gating signal generator, used to generate a high side driving signal and a low side driving signal according to an error voltage between the time-varying reference voltage and a current sensing voltage. | 08-18-2011 |
| 20110204821 | OMNI VOLTAGE DIRECT CURRENT POWER SUPPLY - A battery operated LED lighting apparatus including: a battery outputting a battery voltage; a light emitting diode or array of light emitting diodes; and a power supply including a boost regulating circuit. The power supply being in communication with the battery and the light emitting diodes such that a constant voltage or constant current is supplied to the light emitting diodes as the battery discharges and the battery voltage falls below the output voltage. In a preferred embodiment the power supply further includes a buck regulator to maintain the proper output voltage when the battery voltage is greater than the output voltage. | 08-25-2011 |
| 20110204822 | DEVICE AND METHOD OF PROVIDING POWER TO GAS DISCHARGE LAMP | 08-25-2011 |
| 20110221360 | FEEDBACK LOOP FOR EMITTER FLASHING - A method and a device for stabilizing the emission current of an emitter of a charged particle beam device are provided. In the method, the emitter is operated under predetermined operation parameters including at least one voltage with a predetermined value. The method includes determining a first value of the emission current under the predetermined operation parameters and flash cleaning the emitter while a first electric field is applied to the emitter. The first electric field is generated by the at least one voltage having a first value of the at least one voltage, wherein the first value of the at least one voltage is provided in dependence of the determined first value of the emission current. | 09-15-2011 |
| 20110227506 | CONTROLLERS, SYSTEMS AND METHODS FOR CONTROLLING POWER OF LIGHT SOURCES - A controller for controlling power to an LED light source includes a control terminal and control circuitry coupled to the control terminal. The control terminal provides a control signal to control a transformer. A cycle of the control signal includes a charging period, a discharging period, and an adjusting period. The control circuitry controls a primary winding of the transformer to receive power during the charging period and controls a secondary winding of the transformer to discharge power to the LED light source during the discharging period. The control circuitry further varies a frequency of the control signal periodically by controlling the adjusting period. | 09-22-2011 |
| 20110234123 | Dynamic Loading of Power Supplies - A circuit for altering a level of impedance presented to a power supply including a power supply line includes an energy dissipating circuit, a detection circuit configured to generate a control signal indicative of a power consumption level in a load circuit coupled to the power supply line, and an activation circuit configured to controllably couple the energy dissipating circuit to the power supply line in response to the control signal. Methods of operating a solid state lighting apparatus including a power supply and a solid state lighting device coupled to the power supply include detecting a level of power consumption by the solid state lighting device, and coupling an energy dissipating circuit to the power supply in response to the level of power consumption by the solid state lighting device falling below a threshold level. | 09-29-2011 |
| 20110241570 | INTELLIGENT SOFT START CONTROL TO REDUCE ELECTROSTATIC DISCHARGE CLAMP CURRENT SPIKES - Systems and methods of regulating a power supply may involve ramping an output voltage of the power supply toward an operating voltage level at a first slew rate in response to detecting a soft start condition of the power supply. A determination can be made as to whether the output voltage has exceeded an intermediate voltage level and, if so, the output voltage may be ramped toward the operating voltage level at a second slew rate. The first slew rate can be substantially less than the second slew rate in order to prevent an electrostatic discharge pump from activating. | 10-06-2011 |
| 20110241571 | Correction circuit, drive circuit, light-emitting device and correction method of current pulse waveform - A drive circuit and a drive current correcting method are described herein. The drive circuit comprises a current source that outputs a drive current, and a correction circuit that outputs a correction current. The correction circuit includes a first RC time constant circuit. An output terminal of the current source is connected to an output terminal of the correction circuit. | 10-06-2011 |
| 20110248649 | SYSTEMS AND METHODS FOR A DIGITAL-TO-CHARGE CONVERTER (DQC) - Systems and methods for a digital-to-charge converter (“DQC”) are disclosed. A DQC may include a converting circuit configured to receive a first digital signal indicative of a voltage across a capacitor coupled to an output pin of the digital-to-charge converter and to determine a present charge of the capacitor based at least in part on the first digital signal. The DQC may also include an error determining circuit coupled to the converting circuit, wherein the error determining circuit is configured to receive a second digital signal indicative of a target charge via an input pin of the digital-to-charge converter and to determine a difference between the target charge and the present charge. The DQC may further include a correction circuit coupled to the error determining circuit and configured to control a programmable current source to produce an analog signal at the output pin in response to the determined difference. | 10-13-2011 |
| 20110248650 | Power Tool with Light Unit - A power tool includes a housing coupled to an electrical power source, a motor contained in the housing, and a motor control circuit that controls output speed of the motor. A light unit is coupled to the housing to illuminate a work surface. A light unit control circuit controls illumination of the light unit. A switch unit is coupled to the housing and selectively operable to control the operation of the motor control circuit and the light unit control circuit. The light unit control circuit includes a timer configured to cause the light unit to illuminate a first brightness level when the switch unit is actuated, and to remain illuminated at the first brightness level for a predetermined time period after the trigger is actuated. The predetermined time period restarts if the switch unit is not deactivated before the end of the predetermined time period. | 10-13-2011 |
| 20110254468 | VOLTAGE CONVERTER AND DRIVING METHOD FOR USE IN A BACKLIGHT MODULE - A voltage converter for use in a backlight module stores energy of an input voltage using an inductor and outputs a plurality of output voltages accordingly. The charging path of the inductor is controlled according to the first output voltage so that the first output voltage can be stabilized. The discharging paths from the inductor to other output voltages are controlled according to the differences between other output voltages and the first output voltage so that other output voltages can also be stabilized. | 10-20-2011 |
| 20110254469 | DIMMING CIRCUIT AND METHOD FOR LEDS - A dimming circuit and method for a LED provide a first driving voltage or a second driving voltage according to a dimming signal provided by a functional IC to enable or disable the LED. The values of the first and second driving voltages are controlled so that overstressing of the LED is avoided while the functional IC is capable of working even when the LED is off. The LED's life time is thus prolonged. | 10-20-2011 |
| 20110260650 | DEVICE FOR CONTROLLING POWER SUPPLY TOWARDS LIGHT SOURCES AND RELATED METHOD - In various embodiments, a device for controlling power supply towards at least one light source comprising a load having a value variable as a result of switching of at least one switch coupled thereto, is provided. The device may include: a power supply set controllable to determine the intensity of the current fed towards said load; a current feedback loop sensitive to the intensity of the current fed towards said load, said current feedback loop connected to said power supply set to maintain the intensity of the current fed towards said load upon variation of said load; and a voltage control sensitive to the voltage across said load, said voltage control likewise connected to said power supply set to maintain the intensity of the current fed towards said load upon variation of said load. | 10-27-2011 |
| 20110260651 | CONTROL CIRCUIT OF LIGHT-EMITTING ELEMENT - A control circuit of a light-emitting element comprises a rectifying unit ( | 10-27-2011 |
| 20110266975 | ILLUMINATION CONTROLLER AND ILLUMINATION DRIVING SYSTEM - An illumination controller adapted to control a converting circuit to convert an electric power of a DC input power source to drive a light source is provided. The illumination controller includes a dimming unit and a control unit. The dimming unit receives a dimming signal and correspondingly generates a dimming control signal according to the number of the dimming signal. The control unit controls the electric power provided to the light source by the converting circuit according to the dimming control signal, so as to adjust a brightness of the light source. Furthermore, an illumination driving system is also provided. | 11-03-2011 |
| 20110266976 | System and Method of Tuning Current for LEDs - An apparatus includes a LED and a regulator circuit. The regulator circuit controls the current provided to the LED according to a calibration signal that is coupled to the current. The regulator circuit adjusts the output of the LED when the calibration signal is adjusted. In this manner, the LED may be calibrated to generate light at a desired brightness level and color level. | 11-03-2011 |
| 20110266977 | ILLUMINATED OPTICAL APPARATUS - A device may include a magnifying lens having a focal length that defines a focal plane, a light source providing visible light directed toward the focal plane, and a controller. The controller may be programmed to receive a signal indicative of the distance from the device to an object, cause the light source to emit light at a first brightness if the distance is at least substantially equal to the focal length of the lens, and cause the light source to emit light at a second brightness, dimmer than the first brightness, if the distance is not at least substantially equal to the focal length of the lens. | 11-03-2011 |
| 20110273113 | Method and Device for Driving Light-Emitting Diode - A method for driving a light-emitting diode based upon an AC input voltage includes receiving and full-wave rectifying the AC input voltage to generate a full-wave rectified input voltage, generating a pulse width modulation signal according to the full-wave rectified input voltage and a luminance signal, and generating a driving voltage according to the pulse width modulation signal and the full-wave rectified input voltage, and applying the driving voltage to the light-emitting diode. | 11-10-2011 |
| 20110279061 | FEEDBACK CONTROL CIRCUIT AND POWER CONVERTING CIRCUIT - An exemplary embodiment of the invention provides a set of an initial value of an error amplifying signal in the feedback control circuit for feedback control, so as to reduce the time and the amplitude of oscillation of the error amplifying signal. Accordingly, a feedback control circuit and a power converting circuit provided in an exemplary embodiment of the invention not only reduce the degree and the time of overshoot but also provide accurate and stable feedback control. | 11-17-2011 |
| 20110279062 | DC POWER SUPPLY UNIT AND LED LIGHTING APPARATUS - In one embodiment, a DC power supply unit includes a DC power supply source; a load circuit connected to an output end of the DC power supply source; a load state detection device to detect a load voltage or an electric quantity corresponding to the load voltage; and a control device to receive the detected output of the load state detection device. The control device controls a maximum output voltage of the DC power supply source so that the voltage difference between the maximum output voltage of the DC power supply source and the load voltage at the time of normal operation falls within a predetermined range in which arc discharge is suppressed. | 11-17-2011 |
| 20110285321 | LIGHT SOURCE DRIVING CIRCUIT WITH LOW OPERATING OUTPUT VOLTAGE - A driving circuit for regulating current in a light source using a tracking component. The tracking component detects the voltage difference between an input node in the input stage and an output node in the output stage. The input stage is connected to a current source and includes an input transistor. The output stage is connected to the light source and includes an output transistor. The tracking component generates an output that controls the input and output transistors based on the voltage difference between the input node and the output node so that the voltage at the input node tracks the voltage at the output node. By using the tracking component, the LED driver can achieve accurate current control through one output transistor instead of cascaded transistors, resulting in lower output operating voltage and reduced power dissipation of the LED driver. Further, the tracking component is intermittently operated or shared across different channels to reduce energy consumption of the LED driver. | 11-24-2011 |
| 20110285322 | GAS-DISCHARGE LAMP CONTROLLER UTILIZING A NOVEL PREHEATING PHASE CONTROL MECHANISM - A gas-discharge lamp controller utilizing a novel preheating phase control mechanism, having: a supply voltage tracking reference voltages generator, biased between a supply voltage and a reference ground, for generating a first reference voltage which is proportional to the supply voltage; and a control unit, for generating a high threshold signal according to the first reference voltage and a saw-tooth signal, the peak value of the saw-tooth signal being proportional to the supply voltage, wherein the control unit has a preheating phase, the high threshold signal is coupled with the first reference voltage during the preheating phase, and the time duration of the preheating phase is set by a predetermined number of periods of the saw-tooth signal. | 11-24-2011 |
| 20110285323 | DRIVING CIRCUIT WITH DIMMING CONTROLLER FOR DRIVING LIGHT SOURCES - A dimming controller for controlling dimming of a light-emitting diode (LED) light source includes a monitoring terminal and a control terminal. The monitoring terminal receives a switch monitoring signal indicative of an operation of a power switch which transfers power from an AC power source to a bridge rectifier when the power switch is on. A power converter receives input power from the bridge rectifier and provides output power to the LED light source. The control terminal generates a control signal to adjust the output power according to the switch monitoring signal so as to control dimming of the LED light source. | 11-24-2011 |
| 20110291592 | Dimmer Conduction Angle Detection Circuit and System Incorporating the Same - A conduction angle detection circuit, and systems and methods incorporating the same, is disclosed. The circuit includes a comparator having a first input and a second input, and configured to provide a pulse-width modulated output in response to comparison of signals at the first input with signals at the second input. The output has a pulse width representative of a dimmer setting of a dimmer circuit. The circuit also includes a limiting circuit coupled to the comparator and configured to receive a rectified voltage and to provide a voltage-limited output in response to the rectified voltage to the first input of the comparator. The circuit also includes a threshold supply circuit configured to provide a threshold voltage to the second input of the comparator, and a filter coupled to the comparator. The filter is configured to convert the pulse-width modulated output of the comparator to the dimmer reference level signal. | 12-01-2011 |
| 20110291593 | Fast Reignition of a High Intensity Discharge Lamp - Embodiments of the present invention provide for the rapid reignition of a high intensity discharge lamp. In one embodiment of the invention, an apparatus for a fast reigntion of a high intensity discharge lamp is disclosed. The apparatus is comprised of a ballast operatively coupled to the lamp that is configured to receive power from a power supply. The apparatus is also comprised of a timer circuit that enters a timing phase and produces a quantum of timing information when the lamp ceases receiving power from the power supply. This timer circuit does not require external power during the timing phase. The apparatus is additionally comprised of a control circuit that receives the timing information and permits the ballast to reignite the lamp based on the information. | 12-01-2011 |
| 20110298395 | CONTROL CIRCUIT OF LIGHT-EMITTING ELEMENT - A control circuit of a light-emitting element comprises a rectifying unit which full-wave rectifies an alternating current power supply, a clock generator which generates and outputs a clock signal (CLK), a first comparator which compares a comparison voltage (CS) corresponding to a current flowing to the light-emitting element and a reference voltage (REF), and a switching element which is set to an ON state in synchronization with the clock signal (CLK) and which is set to an OFF state when the comparison voltage (CS) becomes greater than the reference voltage (REF) at the first comparator, to switch the current flowing to the light-emitting element. In this structure, a period of the clock signal (CLK) generated in the clock generator is varied, to reduce or inhibit noise. | 12-08-2011 |
| 20110298396 | Light Emitting Device and Electronic Equipment Using the Same - A light emitting device is provided which is capable of displaying in desired colors stably by controlling a change in luminance of OLED when an organic light emitting layer is degraded or there is a change in temperature of the surroundings. A reference value for the amount of current flowing into a pixel portion is calculated from data of a video signal. Then, the pixel portion displays an image in accordance with the data of the video signal and the drive current at the time is measured for all of OLEDs in the pixel portion. The two voltage values supplied from a variable power supply to the pixel portion are corrected such that the measured drive current approaches the reference value. With the above structure, lowering of luminance which accompanies degradation of an organic light emitting layer is prevented and a clear image can be displayed as a result. | 12-08-2011 |
| 20110304278 | Constant Power Limiter and Illumination Device Having Same - A constant power limiter includes a control circuit and a power source circuit thereof, and the control circuit includes a voltage detection circuit configured for detecting a voltage of power source; a current detection circuit configured for detecting a load current; a zero-cross detection circuit configured for detecting a zero-cross point of AC power; a load driving circuit including a controlled silicon; and a micro control unit (MCU) configured for receiving output signals from the voltage detection circuit, the current detection circuit, and the zero-cross detection circuit, and outputting a control signal respectively to the load driving circuit to control a load power, wherein when the load power is less than or equal to a set power value, the load driving circuit has the controlled silicon fully open, when load power is no less than the set power value, the load driving circuit has the controlled silicon conduction angle decreased to stabilize the load power at the set power value. | 12-15-2011 |
| 20110304279 | OPEN CIRCUIT VOLTAGE CLAMP FOR ELECTRONIC HID BALLAST - An electronic high intensity discharge (HID) ballast ( | 12-15-2011 |
| 20110304280 | LIPS BACKLIGHT CONTROL ARCHITECTURE WITH LOW COST DEAD TIME TRANSFER - A driving circuitry arranged to pass a dead time over an isolation transformer, the driving circuitry constituted of: a three-state driver arranged to output a first signal, the first signal selectively at one of two complementary voltage levels and a high impedance state; a first capacitor, a first end of the first capacitor coupled to receive the first signal; and a first isolation transformer, a first end of a first winding of the first isolation transformer coupled to a second end of the first capacitor. | 12-15-2011 |
| 20110309770 | LED LAMP HEAD WITH VARIABLE BRIGHTNESS - A lamp head is configured to be electrically coupled solely to a power-supply element and a return element. A power voltage carried by the power-supply element is regulated by a control element. The lamp includes at least one LED configured to emit light, and a first circuit coupled to the at least one LED and configured to adjust the brightness of the light emitted by the at least one LED solely in response to adjustments made to the power voltage by the control element. | 12-22-2011 |
| 20110309771 | PROPORTIONAL REMOTE CONTROL - Disclosed is a proportional controller that utilizes a deflected metal cantilever that provides a progressive change in capacitance for a given deflection that is used to generate a proportional control signal. In addition, a efficient step-up converter | 12-22-2011 |
| 20110316449 | LOAD DRIVING CIRCUIT - A main transformer is arranged such that a load is connected to its secondary winding side. A first error amplifier generates a feedback signal that corresponds to the difference between a detection signal which indicates the electrical state of the load and a predetermined first reference voltage. A current generating resistor is arranged between a current generating transistor and a fixed voltage terminal. A second error amplifier is arranged such that the first input terminal receives the electric potential at a node that connects the current generating transistor and the current generating resistor, a predetermined second reference voltage is input to the second input terminal thereof, and the output terminal thereof is connected to the control terminal of the current generating transistor. An adjustment resistor is arranged between the output terminal of the first error amplifier and a node that connects the current generating transistor and the current generating resistor. | 12-29-2011 |
| 20120001571 | BACKLIGHT MODULE DETECTING ABNORMAL LAMP TUBES AND AN LCD THEREOF - A backlight module detecting abnormal lamp tubes and an LCD employing such a backlight module are proposed. The LCD includes a voltage calculator for detecting voltage applied on ends of a lamp tube to monitor the lamp tube. Once the lamp tube becomes abnormal, the voltage varies accordingly. The voltage calculator calculates a voltage signal from a plurality of lamp tubes and produces a voltage value. A protection circuit regards the voltage value as a feedback signal to decide if there are any abnormalities. Once any of the lamp tubes is abnormal, the protection circuit transmits the voltage signal to a pulse-width modulated integrated circuit (PWM IC) to activate a protective function. The protection circuit of the present invention obtains the protection signal by sampling the voltage signal of the ends of the lamp tube and then gets the control signal by means of the calculation of the voltage calculator. Thus, voltage level retrieved from the protection signal are less easily affected by dimming and temperature. | 01-05-2012 |
| 20120007524 | Terminal Device and Computer-Readable Storage Medium - A terminal apparatus and a computer-readable storage medium capable of achieving reduction of power consumption by appropriately controlling lighting of a display unit are provided. | 01-12-2012 |
| 20120013269 | POWER SUPPLY APPARATUS FOR AN LED LAMP - The present invention provides a power supply apparatus for an LED lamp, which mainly uses an isolation transformer to convert a high voltage AC input signal into a low voltage AC signal and thus generate a driving voltage for driving an LED lamp, comprising: a waveform and frequency modulation module disposed on the primary side of the isolation transformer for modulating an input waveform and a frequency f; and a secondary rectifier filter module disposed on the secondary side of the isolation transformer for converting the low voltage AC signal after passing through the isolation transformer into the driving voltage. In this way, the power supply apparatus for an LED lamp utilizes the principle of persistence of vision of human eyes to modulate the waveforms and frequencies of voltages for driving LEDs and can still maintain the normal operation. | 01-19-2012 |
| 20120013270 | LIGHT-EMITTING DEVICE AND METHOD - A light-emitting method is provided. The light-emitting method is applied in a light-emitting device. The light-emitting device includes an emitting member to emit light. The light-emitting method includes detecting an air pressure of the light-emitting device and controlling the emitting member to emit light with color and luminance value according to the detected air pressure. A related light-emitting device is also provided. | 01-19-2012 |
| 20120019167 | Backlight Control Circuit and Method Thereof - A backlight control circuit and method thereof are provided to control the backlight of a backlight module so as to enhance the dynamic contrast ratio and save power. The backlight control circuit includes an average luminance detection circuit, a luminance distribution detection unit, a pulse width control circuit and a pulse width modulator. The average luminance detection circuit detects the average luminance of a frame which includes a plurality of pixels; the luminance distribution detection unit detects the pixel luminance distribution of the frame; the pulse width control circuit generates a pulse width control signal according to the average luminance and the pixel luminance distribution of the frame; and the pulse width modulator generates a pulse width modulation (PWM) signal according to the pulse width control signal, so as to control the backlight of the backlight module. | 01-26-2012 |
| 20120019168 | ILLUMINATION CONTROL SYSTEM AND METHOD FOR CONTROLLING ILLUMINATION - According to one embodiment, an illumination control system includes a motion sensor and a central management server. The motion sensor acquires position information and action information of a person. The central management server holds holding position information of an illumination unit and necessary light amount information for action information of the person, acquires a necessary amount of light corresponding to the action information of the person based on the necessary light amount information, calculates a brightness control amount based on the position information of the illumination unit, and controls the illumination unit using the brightness control amount. | 01-26-2012 |
| 20120019169 | DIMMABLE AMALGAM LAMP AND METHOD FOR OPERATING THE AMALGAM LAMP WHILE DIMMED - A dimmable amalgam lamp is provided having a quartz glass tube enclosing a discharge chamber comprising a filling gas, and closed by pinching at both ends thereof, through which at least one current feedthrough is fed through one coil-shaped electrode each in the discharge chamber, wherein at least one of the pinches has a hollow space having an opening to the discharge chamber for receiving a deposit of amalgam that can be heated by the coil-shaped electrode. In order to provide a method for operating the amalgam lamp on this basis, ensuring a high efficiency of UV-C radiation even when dimmed, the invention proposes that the current feedthrough include an outgoing line and a return line for an additional current I | 01-26-2012 |
| 20120025736 | INTEGRATED CIRCUIT SWITCHING POWER SUPPLY CONTROLLER WITH SELECTABLE BUCK MODE OPERATION - An integrated circuit (IC) controller for a switching power supply has a selectable operating mode for supporting multiple switching power supply topologies. The IC controls current by controlling a cycle rate of the switching power supply to provide a constant or variable output current, which may be provided to lighting devices such as light-emitting diodes (LEDs). The selectable operating mode includes at least a buck converter operating mode and another operating mode, which may be a flyback converter operating mode. | 02-02-2012 |
| 20120025737 | CURRENT MIRROR CIRCUIT - A current mirror circuit duplicates an input current that flows through an input terminal, and outputs an output current via an output terminal. A first transistor, a second transistor, and a diode are sequentially arranged in series between a power supply terminal to which a fixed voltage is applied and an input terminal. A third transistor and a fourth transistor are sequentially arranged in series between the power supply terminal and the output terminal. The gate of the first transistor and the gate of the third transistor are connected to the drain of the second transistor. The gate of the second transistor and the gate of the fourth transistor are connected to the input terminal. | 02-02-2012 |
| 20120043913 | Dimmer Output Emulation - A lighting system includes a dimmer output voltage emulator to cause a power converter interface circuit to generate an emulated dimmer output voltage. In at least one embodiment, the emulated dimmer output voltage corresponds to an actual dimmer output voltage but is unaffected by non-idealities in the dimmer output voltage, such as premature shut-down of a triac-based dimmer. By generating an emulated dimmer output voltage, the energy delivered to a load, such as a lamp, corresponds to a dimming level setting. | 02-23-2012 |
| 20120062149 | LIGHT EMITTING DIODE DRIVING INTEGRATED CIRCUIT - A driving integrated circuit of light emitting diodes is used for driving at least one light emitting diode. The driving integrated circuit includes a current setting pin, a regulator circuit, and an adjuster. The driving integrated circuit sets a target current for a current flowing through the at least one light emitting diode according to an outflowing current of the current setting pin. The adjuster adjusts a target voltage according to the outflowing current. Then the regulator circuit provides a supply voltage for driving the light emitting diode so as to regulate a terminal voltage of the light emitting diode to the target voltage. | 03-15-2012 |
| 20120068624 | LIGHTING DEVICE WITH MULTI-POSITION JOYSTICK - Various lighting devices and related methods are provided. In one example, a portable lighting device includes a light source, lighting control circuitry, a body, and a tailcap assembly attached to an end of the body. The tailcap assembly includes a multi-position joystick adapted to pivot relative to the body in response to lateral pressure and move vertically relative to the body in response to vertical pressure. The tailcap assembly also includes switches adapted to provide signals to the lighting control circuitry in response to pivot movement and vertical movement of the joystick. The lighting control circuitry is adapted to operate the light source in response to the signals. | 03-22-2012 |
| 20120068625 | LIGHTING DEVICE WITH MULTIPLE ELECTRICAL CONNECTIONS - Various lighting devices and related methods are provided. In one example, a portable lighting device includes a light source, lighting control circuitry, first and second power terminals adapted to receive a battery power source, first and second electrical connections between the lighting control circuitry and the first and second power terminals, a third electrical connection between the second power terminal and the lighting control circuitry, and a switch adapted to selectively connect and disconnect the third electrical connection. The lighting control circuitry is adapted to operate the light source in response to a signal received over the third electrical connection in response to the switch. The first and second electrical connections are adapted to provide constant power to the lighting control circuitry while the battery power source is connected to the first and second power terminals regardless of operation of the switch. | 03-22-2012 |
| 20120068626 | Auto-Sensing Switching Regulator to Drive A Light Source Through A Current Regulator - An auto-sensing switching regulator, and systems and methods including same, is disclosed. The auto-sensing switching regulator includes a switching regulator and a controller coupled thereto. The controller is configured to provide a control signal to the switching regulator to increase the output voltage while receiving a current sense signal representative of a current output of the switching regulator, and to provide the control signal in response to the current sense signal to set the output voltage at a set value corresponding to a value at which the current output stops increasing with an increase in the output voltage. A system to drive a light source includes a current regulator configured to provide a constant current output to the light source and an auto-sensing switching regulator coupled to the current regulator, and configured to receive an input voltage from a voltage supply and provide an output voltage to the current regulator. | 03-22-2012 |
| 20120074870 | Displaying Method and Portable Electronic Device Using the Same - A displaying method used in a portable electronic device is provided. The portable electronic device includes a display panel having a backlight module. The displaying method includes the following steps: turning off the backlight module when a rotation event occurs; waiting for a time period; turning on the backlight module. | 03-29-2012 |
| 20120081038 | DISPLAY PANEL DRIVING VOLTAGE SUPPLY APPARATUS AND METHOD - A display panel driving voltage supply apparatus and method is disclosed. Said supply apparatus comprises: a timing controller for providing a voltage control signal and a switch control signal; a level shifter, receiving the voltage control signal for selecting a first specified voltage to be transmitted on a first driving voltage supply line as well as selecting a second specified voltage to be transmitted on a second driving voltage supply line according to the voltage control signal; and a first switch, wherein the first and the second driving voltage supply lines are electrically connected with each other to charge share between the first and the second specified voltages when the first switch is turned on under the control of the switch control signal. Said supply apparatus is capable of solving the problem of high power consumption and thereby reducing the electricity consumption. | 04-05-2012 |
| 20120081039 | METHOD AND APPARATUS FOR A LED DRIVER WITH HIGH POWER FACTOR - A control circuit of a LED driver according to the present invention comprises an output circuit, an input circuit and an input-voltage detection circuit. The output circuit generates a switching signal to produce an output current for driving at least one LED in response to a feedback signal. The switching signal is coupled to switch a transformer. The input circuit samples an input signal for generating the feedback signal. The input signal is correlated to the output current of the LED driver. The input-voltage detection circuit generates an input-voltage signal in response to an input voltage of the LED driver. The input circuit will not sample the input signal when the input-voltage signal is lower than a threshold. The control circuit can eliminate the need of the input capacitor for improving the reliability of the LED driver. | 04-05-2012 |
| 20120086360 | ADJUSTABLE LIGHTING SYSTEM FOR FLUORESCENT LAMP AND SENSING APPARATUS OF THE ADJUSTABLE LIGHTING SYSTEM - An adjustable lighting system for fluorescent lamp, which includes a lighting unit, a sensing apparatus and a control apparatus, is provided. The lighting unit can emit a light. The sensing apparatus can sense if a target exists and generate a sensing signal accordingly. The sensing apparatus further generates and outputs a modulating signal based on the sensing signal. The control apparatus can receive the modulating signal from the sensing apparatus, adjust a supporting current of a power source and support the pulse width and phase level of the supporting current to the lighting unit, to control the strength of the light emitted by the lighting unit. Particularly, if the target exists, the modulating signal drives the control apparatus to provide a larger pulse width and phase level of the supporting current, so as to increase the strength of the light, or the modulating signal drives the control apparatus to provide a smaller pulse width and phase level of the supporting current, so as to decrease the strength of the light. | 04-12-2012 |
| 20120086361 | POWER SAVING ARRANGEMENT FOR USE WITH A USER IMPLEMENTABLE PHASE CUT DIMMER - A power saving arrangement for use with a phase cut dimmer, the power saving arrangement constituted of: a power converter arranged to convert a received alternating current power signal to a direct current signal; a detector arranged to detect the presence, or absence, of the phase cut dimmer blocking a portion of an alternating current mains power sine wave from reaching the power converter; and a controllable minimum holding current circuit in communication with the received alternating current power signal, the controllable minimum holding current circuit responsive to an output of the detector, wherein in the event that the detector detects the absence of the phase cut dimmer, the controllable minimum holding current circuit is disabled such that a minimum holding current is not provided. | 04-12-2012 |
| 20120091914 | FAULT TOLERANT ION SOURCE POWER SYSTEM - The presently disclosed technology provides a responsive ion beam source power supply system capable of handling fault events without relying on conventional protection circuitry (e.g., fuses and breakers) so that physical power supply hardware intervention by a user is minimized for typical fault conditions and the ion beam source power supply system may recover automatically after experiencing a fault condition. The presently disclosed technology further discloses an ion beam source power supply system capable of detecting and diagnosing fault states, autonomously implementing command decisions to preserve or protect the function of other ion source modules or sub-systems, and/or mitigating or recovering from the disruptive fault event and returning the ion beam source system to desired user settings. | 04-19-2012 |
| 20120091915 | POWER LINE COMMUNICATION METHOD AND APPARATUS FOR LIGHTING CONTROL - A transmitter apparatus and a ballast/driver receiver apparatus are presented for transmitting control information through a lighting system power line connection to a ballast or driver in which the transmitter selectively interrupts power delivery in select AC line power cycles to indicate data of a first binary state an uninterrupted power cycles indicate a second binary state with the receiver decoding the message data bits of different binary states based at least partially on the interruptions. | 04-19-2012 |
| 20120098463 | PRIMARY-SIDE REGULATION OF OUTPUT CURRENT IN A LINE-POWERED LED DRIVER - A line-powered LED driver is operable to provide primary-side regulation of output current supplied to LED circuitry. The circuit includes a feedback loop coupled to a power converter, wherein the feedback loop adds scaled input current to scaled input voltage to produce a control signal. The power converter is responsive to the control signal to adjust input current drawn by the power converter in response to changes in line voltage to provide constant input power. The power converter produces output power for supplying constant output current at the LEDs. The feedback loop may use a reference voltage derived from the LED circuitry so that the output power may be regulated to provide constant LED current for varying LED voltages. When compared to secondary-side current feedback schemes, the LED driver provides increased efficiency and reliability at a reduced cost by implementing primary-side regulation of the output current. | 04-26-2012 |
| 20120104975 | LIGHTING SYSTEM ELECTRONIC BALLAST OR DRIVER WITH SHUNT CIRCUIT FOR LIGHTING CONTROL QUIESCENT CURRENT - Ballasts and LED drivers are presented for powering at least one light source, in which a shunt circuit provides a high impedance to allow operation of the light source when the AC input power exceeds a power threshold value, and provides a low impedance when the AC input power is below the power threshold value to prevent an output power stage from providing power to the light source. | 05-03-2012 |
| 20120112666 | ELECTRICAL OUTLET ACTIVATION AND DEACTIVATION SYSTEM - An electrical outlet activation and deactivation system includes a controller coupled to a live power source comprising a switch and an RF signal receiver. A remote environmental sensor comprises a motion sensor, a photo cell, and an RF signal transmitter. The motion sensor, detecting a motion, sends a first condition signal coupling the live power source to the electrical outlet or device. The photo cell, detecting a daylight condition, prevents the sending of the first condition signal. A timer uncouples the live power source after a predetermined time has elapsed since the motion sensor last detected the motion. A regulator couples and uncouples the live power source to the electrical outlet or device independent of the sensor. The controller can include an electrical plug removably connectable to the live power source through an electrical outlet, or alternatively, can be permanently coupled to the live power source through a hardwire connection. | 05-10-2012 |
| 20120112667 | Controlling Intensity of a Light Through Qualified Motion Sensing - Methods and apparatuses for controlling light intensity of a light through motion sensing are disclosed. One method includes sensing a first instance of motion. The light is activated only if consecutive instances of motion are sensed, wherein each instance is sensed within a gap of time of a previously sensed instance of motion, and the consecutive instances of motion being sensed span an entire window of time after sensing the first instance of motion. One apparatus includes a motion sensor for sensing a first instance of motion. The apparatus further includes a controller interfaced to the motion sensor and the light, the controller operative to activate the light only if consecutive instances of motion are sensed, wherein each instance is sensed within a gap of time of a previously sensed instance of motion, and the consecutive instances of motion being sensed span an entire window of time after sensing the first instance of motion. | 05-10-2012 |
| 20120119677 | Power Supply Arrangement and Method for the Power Supply of an Electrical Load - A power supply arrangement ( | 05-17-2012 |
| 20120126719 | LED DRIVER CIRCUIT AND METHOD - An LED driver circuit and a method for driving the LED driver circuit. In accordance with an embodiment the LED driver circuit includes a voltage follower circuit and a calibration circuit coupled to the voltage follower circuit. First and second currents may be injected into the node and a current is sunk from the node. In accordance with another embodiment, the LED driver circuit asserts a non-zero voltage across the light emitting diode in a first phase of a drive cycle and asserts a fixed non-zero current in the light emitting diode in a second phase of the drive cycle. | 05-24-2012 |
| 20120126720 | THREE-DIMENSIONAL IMAGE DISPLAY DEVICE - A three-dimensional image display device includes a luminance controller receiving a three-dimensional enable signal, a backlight data signal and at least one starting signal of a scan starting signal, a vertical blank starting signal and a backlight starting signal. The luminance controller outputs a backlight control signal and a backlight unit is operated based on the backlight control signal and is coupled to the luminance controller. The backlight data signal is based on a previous pulse of the starting signal and is applied from a first time when a current pulse of the starting signal starts to a second time when a next pulse of the starting signal starts. | 05-24-2012 |
| 20120133302 | High pressure discharge lamp lighting device - A high-pressure discharge lamp lighting device is used for projector devices that allow controlling the mean electric power at a desired value with a slow processing speed. A color wheel rotates and disperses the beam from lamp into each of the color components, such that the electric power supplied to the lamp is controlled at different levels for each segment of the color wheel and the power feeding device control part finds the mean electric power by sampling the electric power supplied. | 05-31-2012 |
| 20120139447 | DRIVING CIRCUIT HAVING A POWER FACTOR CORRECTION (PFC) FUNCTION - A driving circuit having a power factor correction (PFC) function includes a power converter, a harmonic wave generator, a voltage divider, and a modify element. The power converter receives AC power to convert to DC power. The harmonic wave generator generates a harmonic wave from the DC power. The voltage level of the harmonic wave is decreased by the voltage divider to generate a comparing signal. The modify element compares the comparing signal and a feedback current signal of the LED to regulate the DC power accordingly for power-supplying the LED stably. Therefore the power factor (PF) of the driving circuit is enhanced. | 06-07-2012 |
| 20120139448 | TWO-TERMINAL CURRENT CONTROLLER AND RELATED LED LIGHTING DEVICE - A two-terminal current controller having a current limiting unit and an adjusting unit regulates a first current flowing through a load according to a load voltage. When the load voltage does not exceed a first voltage, the two-terminal current controller operates in a first mode for conducting a second current associated a rectified AC voltage, thereby limiting the first current to zero and adjusting the second current accordingly. When the load voltage is between the first voltage and a second voltage, the two-terminal current controller operates in a second mode for conducting the second current, thereby limiting the first current to zero and limiting the second current to a constant value larger than zero. When the load voltage exceeds the second voltage, the two-terminal current controller operates in a third mode for turning off the current limiting unit. The adjusting unit can adjust the predetermined value and the second voltage. | 06-07-2012 |
| 20120139449 | Movement-Based Feedback Device - An apparatus is provided that includes a substrate and an affixed accelerometer configured to measure acceleration of the substrate, and produce a signal representative of the measured acceleration. The apparatus also includes a light-emitting component capable of emitting multiple colors of light with variable luminosity, with the color and luminosity of light emitted by the light-emitting component defining a visual output produced by the light-emitting component. And the apparatus includes a processor coupled to the accelerometer and light-emitting component. The processor is configured to receive the signal from the accelerometer, calculate a visual output according to an algorithm as a function of the measured acceleration of the substrate, and cause the light-emitting component to produce the calculated visual output. | 06-07-2012 |
| 20120146549 | Power Supply System for Electronic Loads - The invention relates to a power supply system and a method for providing a load (L) with electrical power from either a first or a second AC grid source ( | 06-14-2012 |
| 20120146550 | LED DRIVE CIRCUIT - An LED drive circuit for driving an LED includes a reactor L | 06-14-2012 |
| 20120153868 | LIGHT TIMEOUT OPTIMIZATION - A lighting controller may optimize a timeout value of a lamp based on the goals of saving energy and providing occupant comfort. The lamp may illuminate a lighting area. The lighting controller may determine a false-negative rate for the lamp from sensor data that represents a frequency at which the lamp is timed out while the lighting area is occupied. The lighting controller may adjust the timeout value of the lamp over time so that the false-negative rate approaches a threshold false-negative rate. The false-negatives and occupancy periods may be detected from spikes in time distributions of motion data. The amount of energy that the lamp would consume at an increased timeout value of the lamp may be determined from motion data stored while the timeout value of the lamp is at an initial timeout value. | 06-21-2012 |
| 20120153869 | Dimmable Power Supply - Various embodiments of a dimmable power supply are disclosed herein. For example, some embodiments provide a dimmable power supply including an output driver, a variable pulse generator and a load current detector. The output driver has a power input, a control input and a load path. The variable pulse generator includes a control input and a pulse output, with the pulse output connected to the output driver control input. The variable pulse generator is adapted to vary a pulse width at the pulse output based on a signal at the control input. The load current detector has an input connected to the output driver load path and an output connected to the variable pulse generator control input. The load current detector has a time constant adapted to substantially filter out a change in a load current at a frequency of pulses at the variable pulse generator pulse output. | 06-21-2012 |
| 20120161668 | LED Driving Circuit - An LED driving circuit is provided in the present invention. The driving circuit includes a load; a control module providing a control signal for regulating a current flowing through the load; a first NMOS; and a first resistor coupled with the control module in parallel so as to generate a clamp voltage providing to the control module. | 06-28-2012 |
| 20120169255 | CONTROL DEVICE FOR A DISCHARGE LAMP - A control device of a driving circuit of a discharge lamp is described. The driving circuit comprises an half bridge with a high side and a low side switches and the control device comprises a first device configured to control the switching frequency of the half bridge and a second device configured to detect the saturation current condition of the choke or the over current condition by detecting, cycle by cycle, a signal representative of the current passing through the low side switch. The second device generate a signal to cause the turning off of the low side switch and the turning on of the high side switch when the saturation current or over current condition of the choke is detected. | 07-05-2012 |
| 20120176066 | PORTABLE LIGHTING DEVICE AND METHOD THEREOF - A portable lighting device includes a controller, a power source that provides a voltage, and a load that includes a light emitting diode (LED) light source. The controller receives the voltage and regulates a current of the LED light source based on a sensing signal indicating the voltage of the power source. The controller regulates the current of the LED light source to a first current level if the voltage of the power source is greater than a first voltage level, and to a second current level if the voltage of the power source is less than a second voltage level. The second voltage level is less than the first voltage level. The controller regulates the current of the LED light source to vary according to the sensing signal if the voltage of the power source is between the first voltage level and the second voltage level. | 07-12-2012 |
| 20120181952 | DRIVE CIRCUIT FOR LIGHT-EMMITING DIODE ARRAY - The invention relates to a drive circuit for driving an LED array. In order to allow driving the LED array based on an AC current supplied by an electronic ballast circuit for driving a fluorescent lighting device, the invention provides for a power supply sub-circuit converting the supplied AC current to a DC current and at least partially storing energy of the converted DC current for driving the LED array. Further, the power supply sub-circuit is connected/disconnected to/from at least one of first or second terminals in response to the presence/absence of the AC current supplied via a terminal of at least one of the first or second terminals. Accordingly, the power supply sub-circuit is connected to the first and second terminals only when the supplied AC current is simultaneously supplied via a terminal of each of the first and second pair of terminals. | 07-19-2012 |
| 20120187868 | LASER INSTRUMENT AND METHOD FOR ADJUSTING THE LASER POWER - A laser instrument and a method for adjusting the laser power is disclosed. The laser instrument includes a laser device which generates a laser beam and a rotating device which moves the laser device back and forth around an axis of rotation between a first turning point and a second turning point. The laser beam generates a laser line between a first end point and a second end point on a target surface. A control device is provided which adjusts the laser power of the laser beam as a function of a rotation angle and/or an angular velocity of the rotating device. | 07-26-2012 |
| 20120187869 | POWER SUPPLY DEVICE - In various embodiments, an electrical power supply device may include a transformer with a primary winding having coupled thereto a main switch switchable on and off to connect and disconnect said primary winding from a supply source and a secondary winding having coupled therewith a main branch for feeding a load and at least one auxiliary branch to provide an auxiliary power supply; wherein said at least one auxiliary branch includes a switching regulator with hysteresis with a respective auxiliary switch sensitive to the voltage on said secondary winding and the voltage of said auxiliary power supply, said auxiliary switch configured for closing to draw current from said main branch toward said auxiliary power supply in the presence of a negative transition of the voltage on said secondary winding and for opening when the voltage on said auxiliary power supply reaches an upper reference level. | 07-26-2012 |
| 20120187870 | LIGHTING DEVICE AND LUMINAIRE - According to one embodiment, a lighting device includes a lighting circuit and a control circuit. The lighting circuit includes an output end to which an illumination lamp is connected, and lights the illumination lamp by a direct-current power. The control circuit controls the lighting circuit so that power consumption caused by a contact resistance at a connection part between the illumination lamp and the output end of the lighting circuit during whole light lighting of the illumination lamp does not exceed a specified value set to 8 W or less. | 07-26-2012 |
| 20120194098 | BRIGHTNESS CONTROL FOR LIGHTING FIXTURES - A brightness controller determines a dimmer setting and adjusts brightness of a light source according to the dimmer setting. | 08-02-2012 |
| 20120194099 | ELECTROLUMINESCENT DEVICE AGING COMPENSATION WITH MULTILEVEL DRIVE - Compensation for aging of an electroluminescent (EL) emitter having a luminance and a chromaticity that both correspond to the density of the current and the age of the EL emitter is performed. Different black, first and second current densities are selected based on the measured age, each corresponding to emitted light colorimetrically distinct from the light emitted at the other two current densities. Respective percentages of a selected emission time are calculated for each current density to produce a designated luminance and chromaticity. The current densities are provided to the EL emitter for the calculated respective percentages of the emission time so that the integrated light output of the EL emitter during the selected emission time is colorimetrically indistinct from the designated luminance and chromaticity, no matter the age of the EL emitter. | 08-02-2012 |
| 20120194100 | LIGHTING DEVICE AND LUMINAIRE - According to one embodiment, a lighting device includes a lighting circuit, a lighting time measuring circuit, an initial illuminance correction control circuit and a dimming control circuit. The lighting circuit lights an illumination lamp. The lighting time measuring circuit counts a lighting time of the illumination lamp. The initial illuminance correction control circuit performs initial illuminance correction control of the lighting circuit according to the lighting time counted by the lighting time measuring circuit, and controls light output of the illumination lamp to be constant during life of the illumination lamp. The dimming control circuit performs dimming lighting control of the lighting circuit according to a dimming signal. | 08-02-2012 |
| 20120223658 | LAMP AND LUMINAIRE WITH AT LEAST ONE LIGHT EMITTING DIODE - In various embodiments, a lamp is provided. The lamp may include at least one light emitting diode; a housing, which comprises at least a first housing part and a second housing part, wherein the first housing part is arranged movably relative to the second housing part; a motion detection sensor for detecting a magnitude of a movement of the first housing part relative to the second housing part; and a radiation modification apparatus for modifying at least one parameter of the radiation emitted by the at least one light emitting diode, the radiation modification apparatus being coupled to the motion detection sensor, the radiation modification apparatus being designed to modify the radiation to be emitted by the at least one light emitting diode depending on the detected magnitude of the movement. | 09-06-2012 |
| 20120229049 | Lighting Control With Automatic and Bypass Modes - Methods, systems and apparatuses for controlling a light through an automatic mode and a bypass mode are disclosed. One method includes receiving physical signaling. Detection of a predetermined sequence of the physical signaling is used to determine whether to control the light in the automatic mode or the bypass mode. The automatic mode provides network control of the light, and the bypass mode bypasses the network control of the light. One lighting system includes a light, a sensor for receiving and sensing the physical signaling, and a controller detecting a predetermined sequence of the physical signaling. Detection of a predetermined sequence of the physical signaling is used to determine whether to control the light in the automatic mode or the bypass mode. The automatic mode provides network control of the light, and the bypass mode bypasses the network control of the light. | 09-13-2012 |
| 20120229050 | CONVERTING CONTROLLER - A converting controller is provided and comprises a first comparing unit, a second comparing unit, a duty cycle operating unit and a reference voltage supplying unit. The first comparing unit receives a detecting signal representing a state of the load and a first reference signal, and generates a first comparing signal accordingly. The duty cycle operating unit controls power conversion of the converting circuit according to the first comparing signal. The second comparing unit receives the detecting signal and a second reference signal, and generates a second comparing signal accordingly. The reference voltage supplying unit supplies the first reference signal and adjusts a level of the first reference signal in response to the second comparing signal. | 09-13-2012 |
| 20120235599 | LIGHTING DEVICE AND METHOD FOR ADJUSTING SENSING REGION THEREOF - A lighting device and a method for adjusting the sensing region thereof are provided. The lighting device includes a sensing device and an illumination unit. The sensing device is configure to detect whether an object is located at a first manipulating region or a second manipulating region so as to correspondingly emit a control signal, in which the first manipulating region and the second manipulating region are not overlapped by each other and are disposed in the sensing region along a sensing direction of the sensing device. The sensing device adjusts a shortest distance between the sensing region and the sensing device and a sensing range of the sensing region according to a first adjustment signal and a second adjustment signal. The illumination unit is coupled to the sensing device and adjusts the optical characteristic according to the control signal. | 09-20-2012 |
| 20120242252 | CONTROL CIRCUIT AND CONTROL METHOD FOR DIMMING LED LIGHTING CIRCUIT - The present invention provides a control circuit for dimming LED lighting. The control circuit comprises a voltage divider, a controller and an adaptive bleeder. The voltage divider receives an input voltage from an input terminal to generate a dimming signal. The controller generates a switching signal in response to the dimming signal. The controller further generates a control signal in response to the input voltage. The adaptive bleeder receives the control signal and draws a bleeder current from the input terminal in response to the control signal. | 09-27-2012 |
| 20120242253 | METHOD AND DEVICE FOR DRIVING A FLUORESCENT LAMP - A method is described for driving a fluorescent lamp (L) with variable light output within a dimming range between a low dimming level and a high dimming level. The lamp power and the lamp current are monitored. At high dimming level the lamp control is based on current control; at low dimming level, the lamp control is based on power control; at intermediary levels the lamp control is based on both current and power control. A first measuring signal (Ilamp) indicating lamp current and a second measuring signal (Plamp) indicating lamp power are obtained. An error signal (Serr) is calculated as a function of the said two measuring signals and as a function of dim level. With increasing dim level, the contribution of the first measuring signal (Il-amp) to the error signal (Serr) increases while the contribution of the second measuring signal (Plamp) to the error signal (Serr) decreases. | 09-27-2012 |
| 20120249014 | CIRCUIT FOR LEAKAGE-CURRENT ELIMINATION IN LED T8 FLUORESCENT TUBE - An electric-shock protection circuit that incorporates a PWM start-up control circuit for controlling the start-up of the PWM controller IC. When an electric-shock current test is conducted, the PWM start-up control circuit prevents the starting up of this PWM controller IC. This circuit is realized by resistors, capacitors and switches. In order to achieve protection, the switches perform an operation that different electric paths are activated for a supply voltage condition of around 90-149Vac and another condition of around 150-264Vac. The circuit disclosed in this invention: can be used in the electric-shock current test with a wide range of supply voltage; can ensure that the peak value of the shock current is lower than the safety threshold for human bodies; and can solve the problem encountered in carrying out the test of Standard UL935 where one end of the LED light tube is connected to the electric grid. | 10-04-2012 |
| 20120249015 | Intelligent Electrical Systems for Powering Electrical Circuits - An electrical system for powering electrical circuits has a current varying device electrically coupled to a power consuming device and an exhaustible power source connector. A first microprocessor receives power through the exhaustible power source connector and communicates with a first signal modulator and demodulator. An inductor is responsive to the current varying device from which power is drawn. A second microprocessor receives power from the inductor and communicates with a second signal modulator and demodulator. The second signal modulator and demodulator receive power from the inductor. | 10-04-2012 |
| 20120256561 | DC-DC CONVERTER AND DRIVING DEVICE OF LIGHT SOURCE FOR DISPLAY DEVICE USING THE SAME - A DC-DC converter includes a plurality of boost circuits and a controller. The boost circuits are coupled to another in parallel. The boost circuits receive a DC voltage and boost the DC voltage. The controller drives the boost circuits with a duty ratio of less than 50% and different phases. | 10-11-2012 |
| 20120262091 | Portable Lighting Devices - A flashlight having a locking mechanism for securing a head skirt to a head assembly is disclosed. A circuit for temporarily remember the mode of operation of the flashlight is also disclosed. | 10-18-2012 |
| 20120262092 | SOUND-ACTUATED ILLUMINATION CIRCUIT - A circuit ( | 10-18-2012 |
| 20120268035 | Push button switch - A push button switch for use in logic-level switching applications. It has dual-intensity LED backlighting of a display: the switch off-state is low intensity and the on-state is distinctly brighter. The button assembly, not attached to the main body, uses magnets to provide a tactile touch and a retaining force. The backlight power is inductively coupled to the button assembly by a high-frequency oscillator that also limits and controls the LED backlight current. Switching is by a Hall-effect switch; alternate action is by bistable logic; and diode logic provides single-wire switch output and remote-control input. The wire can also carry remotely generated pulse signals to program an alternative active display. There are no mechanisms or wear parts in the assemblies, allowing impregnation sealing. | 10-25-2012 |
| 20120268036 | POWER SUPPLY FOR AIRFIELD LIGHTING - Disclosed herein is a power supply suitable for use with an airfield lighting device. In accordance with an example embodiment, there is disclosed herein, a rectifier that converts a signal from an alternating current (AC) current source to a direct current (DC) voltage. The circuit comprises a current sensor, a controller, and a half active bridge rectifier. The controller receives a signal from the current sensor and controls the operation of the half active bridge rectifier to produce a light emitting diode (LED) current based on the current sensed by the current sensor. | 10-25-2012 |
| 20120268037 | LIGHTING APPARATUS - A lighting apparatus includes a power unit supplied with power; an emission unit to be lit with power supplied from the power unit, with a light quantity of the emission unit being controlled in accordance with a control signal; and a power control part lighting the emission unit after the control signal is supplied. Since the emission unit may be lit after the control signal is supplied, the emission unit may be lit with a light quantity in accordance with the control signal from an initial stage, and hence a user may be prevented from feeling uncomfortable. | 10-25-2012 |
| 20120268038 | Layered Dimmer system - A layered dimmer formed of different layers. The front layer may be a scattering layer, and the back layer may be a reflective layer. The light beam is scattered prior to reflecting, to avoid reflection back to form hotspots. | 10-25-2012 |
| 20120299512 | DIMMING SIGNAL GENERATION DEVICE AND ILLUMINATION CONTROL SYSTEM USING SAME - A dimming signal generation device outputs a square wave voltage signal having an on-duty corresponding to a dimming level to a dimming signal line from a time point when a predetermined time period has elapsed after power-up. In the dimming signal generation device, a specific voltage is outputted to the dimming signal line for the predetermined time period after the power-up. | 11-29-2012 |
| 20120306408 | ENERGY-RECYCLING BURN-IN APPARATUS FOR ELECTRONIC BALLASTS AND A METHOD OF BURNING-IN ELECTRONIC BALLASTS - An apparatus and method for burning-in an electronic ballast for a lamp. The apparatus comprises a first stage for emulating an input impedance characteristic of a lamp for the electronic ballast and a second stage connected to the first stage for providing energy feedback to a power supply. An input of the first stage connects in use to the electronic ballast to be burnt-in. An output of the second stage connects in use to the power supply to provide energy feedback to said power supply from the electronic ballast being burnt-in. The energy-recyclable burn-in apparatus can emulate the lamp characteristics from start up to the steady state, process high-frequency ballast output power and recycle the power back into the power grid. The burn-in method includes operating the apparatus for a predetermined period of time such that a voltage applied to the electronic ballast simulates a steady-state operation of a lamp for the electronic ballast. | 12-06-2012 |
| 20120313548 | AC-DC DUAL-USE LED DRIVING CIRCUIT - An Alternating-current-Direct-current (AC-DC dual-use) Light Emitting Diode (LED) driving circuit includes an input power circuit, a buck-boost converter, and a Pulse Width Modulation (PWM) signal controller. The buck-boost converter, including a switching transistor and a feedback resistor, receives a current signal output from the input power circuit, and drives an LED with a driving signal. The PWM signal controller outputs a PWM signal according to the driving signal, so as to sequentially turn on and turn off the switching transistor. One end of the feedback resistor is coupled to the LED, and a floating ground terminal of the PWM signal controller is coupled to the switching transistor and the other end of the feedback resistor. Therefore, the AC-DC dual-use LED driving circuit is capable of dynamically adjusting the duty ratio of the PWM signal without connecting an external photocoupler. | 12-13-2012 |
| 20120313549 | Filament Detection Circuit - Provided is a circuit for detecting a filament of a fluorescent lamp, wherein a first end of a first filament is connected to a second end of the first filament via an oscillation circuit, and the first end of the first filament is connected to an output of an inverter; a first end of a second filament is connected to a second end of the second filament via an oscillation circuit, wherein the first end of the second filament is connected to an internal ground; the second end of the second filament is connected to a power source, and a voltage at the second end of the second filament is used for controlling ON and OFF of an MOSFET, wherein a source of the MOSFET is connected to the internal ground. | 12-13-2012 |
| 20120313550 | APPARATUS AND METHOD FOR DRIVING COLD CATHODE FLUORESCENT LAMP BY DETECTING DRIVING CHARACTERISTIC OF COLD CATHODE FLUORESCENT LAMP - A driving apparatus for a cold cathode fluorescent lamp (CCFL), including a driving circuit, a detecting element and a control circuit. The driving circuit is for driving the CCFL. The detecting element is for detecting a driving characteristic of the CCFL as a detection output. The control circuit is coupled to the detecting circuit and the driving, and used for controlling the driving circuit according to the detection output. | 12-13-2012 |
| 20120319621 | TRIAC DIMMING SYSTEMS FOR SOLID-STATE LOADS - A system includes a transformer. The transformer includes a first coil and a second coil. The first coil is configured to receive a first voltage based on an output of a switching circuit. The second coil is configured to generate a first current based on the first voltage to power a solid-state load. The system also includes a third coil. The third coil is configured to generate a second voltage based on the first voltage. | 12-20-2012 |
| 20120319622 | Systems And Methods For Conveying Information Using A Control Signal Referenced To Alternating Current (AC) Power - Systems and methods convey information from a controller to at least one slave unit using a single wire referenced to an alternating current (AC) power supply. A control signal has a high voltage and a low voltage. The high voltage is greater than a voltage midpoint of the AC power supply and the low voltage is less than the voltage midpoint. The control signal is conveyed through the single wire to each of the at least one slave unit. At each slave unit, a comparison voltage, representative of the voltage midpoint, is generated by dividing substantially midway the potentials between the power lines of the AC power supply and the control signal is compared to the comparison voltage to determine low and high states of the control signal; the low and high states represent the information. | 12-20-2012 |
| 20120326632 | SEMICONDUCTOR LIGHT SOURCE LIGHTING CIRCUIT - A lighting circuit for lighting a semiconductor light source includes: a DC/DC converter configured to receive a DC first voltage and a DC second voltage and generate a DC third voltage; a first connector including a first terminal, wherein the third voltage is applied to the first terminal, wherein the first connector connects the first terminal and one end of the semiconductor light source; and a control circuit that controls the DC/DC converter. The control circuit selects only the first voltage as a voltage applied to the other end of the semiconductor light source, when a voltage for emitting the semiconductor light source is less than an absolute value of a difference between the first and second voltages. The control circuit selects the first voltage or the second voltage as the voltage applied to the other end thereof, when the voltage is not less than the absolute value. | 12-27-2012 |
| 20130002168 | PROGRAMMABLE SOLID STATE ILLUMINATING SYSTEM AND THE CONTROLLING METHOD THEREOF - The invention provides a programmable solid state illuminating system and the controlling method thereof. The programmable solid state illuminating system is capable of controlling the property of a light ray emitted thereby in accordance with a user command inputted by a user. The system previously described comprises a lighting device, a driving device and an external controlling device, wherein the external controlling device comprises an outputting interface module, an inputting interface, a communicating module and a data processing module. Accordingly, the programmable solid state illuminating system of the present invention provides a simple, low cost and reliable way for adjusting the property of the light emitted by the lighting device and the user only need one inventory for various types of end products. | 01-03-2013 |
| 20130002169 | LUMINAIRE - According to one embodiment, a luminaire includes a lighting circuit configured to light a light source with a power supply from the outside, an accumulated-lighting-time storing section configured to store accumulated lighting time of the light source, and a control circuit configured to control the lighting circuit in a set mode. The control circuit sets, if a pattern for turning on and off the power supply from the outside is a predetermined initial illuminance correction setting pattern, a mode in an initial illuminance correction mode for performing initial illuminance correction corresponding to the accumulated lighting time of the light source. The control circuit sets, if the pattern for turning on and off the power supply from the outside is a predetermined normal setting pattern, the mode in a normal mode for not performing the initial illuminance correction. | 01-03-2013 |
| 20130020966 | METHOD AND CIRCUIT FOR IMPROVING CREST FACTOR OF GAS DISCHARGE LAMP - A method and circuit for improving the crest factor of the gas discharge lamp. The method includes: the signal of the gas discharge lamp can be sampled to get a status signal; whether the present stage of the gas discharge lamp is at warm up stage or constant power stage can be judged based on the result of comparison between the status signal and a preset value; preset parameters can be selected based on the stage of the gas discharge lamp, the first parameter can be selected when the gas discharge lamp is at a warm up stage, and the second parameter can be selected when the gas discharge lamp is at a constant power stage; a control signal can be outputted during the lamp current commutation based on the selected first or second parameter to improve the crest factor of the gas discharge lamp. | 01-24-2013 |
| 20130026951 | LED Dimming method and LED Dimming System - The present invention discloses a LED dimming method and a LED dimming system, wherein the LED dimming method comprises the following steps: A: calculating the equivalent current flowing through the LED in accordance with the duty cycle message of the input PWM signal; and B: regulating the current flowing through the LED to the equivalent current. Because the equivalent current flowing through the LED is calculated by the duty cycle message D of the input PWM signal while the duty cycle is not actually regulated, the present invention realizes the aim that the dimming uniformity is improved by linearly regulating the current flowing through the LED. Meanwhile, transformer noise will not be generated because current flows through the transformer in the overall dimming cycle. | 01-31-2013 |
| 20130033197 | ISOLATED FLYBACK CONVERTER FOR LIGHT EMITTING DIODE DRIVER - An isolated flyback converter for an LED driver includes a snubber circuit unit connected to the primary side of a transformer; and a snubber voltage detection unit which detects a snubber voltage of the snubber circuit unit and generates a reference voltage proportional to the detected snubber voltage. Further, the isolated flyback converter includes a switching unit with a source terminal and a drain terminal, and may be turned on or off in response to an arbitrary logic signal. Furthermore, the isolated flyback converter includes a control unit which compares a voltage supplied through the switching current sensing resistor with the reference voltage, and supplies a logic signal at relatively high level or relatively low level to the switching unit to control the switching unit such that a secondary-side current of the transformer is maintained relatively constant. | 02-07-2013 |
| 20130038245 | FAST REIGNTION OF A HIGH INTENSITY DISCHARGE LAMP - Embodiments of the present invention provide for the rapid reignition of a high intensity discharge lamp. In one embodiment of the invention, an apparatus for a fast reigntion of a high intensity discharge lamp is disclosed. The apparatus is comprised of a ballast operatively coupled to the lamp that is configured to receive power from a power supply. The apparatus is also comprised of a timer circuit that enters a timing phase and produces a quantum of timing information when the lamp ceases receiving power from the power supply. This timer circuit does not require external power during the timing phase. The apparatus is additionally comprised of a control circuit that receives the timing information and permits the ballast to reignite the lamp based on the information. | 02-14-2013 |
| 20130049639 | LIGHT SOURCE APPARATUS - A constant-current power source unit has a variable power source which can adjust an output voltage. To detect a voltage applied to the gas discharge tube, a voltage detection unit is provided. A power source controlling unit configured to control the voltage by adding a predetermined voltage to the voltage taken in from the voltage detection unit after the electric discharge is started in the gas discharge tube. | 02-28-2013 |
| 20130057180 | METHOD AND APPARATUS FOR DETECTING AND CORRECTING IMPROPER DIMMER OPERATIOIN - A method is provided for detecting and correcting improper operation of a lighting system including a solid state lighting load. The method includes detecting first and second values of a phase angle of a dimmer connected to a power converter driving the solid state lighting load, the first and second values corresponding to consecutive half cycles of an input mains voltage signal, and determining a difference between the first and second values. When the difference is greater than a difference threshold, indicating asymmetric waveforms of the input mains voltage signal, a selected corrective action is implemented. | 03-07-2013 |
| 20130063047 | Load Control Device for a Light-Emitting Diode Light Source - An LED driver for controlling the intensity of an LED light source includes a power converter circuit for generating a DC bus voltage, an LED drive circuit for receiving the bus voltage and controlling a load current through, and thus the intensity of, the LED light source, and a controller operatively coupled to the power converter circuit and the LED drive circuit. The LED drive circuit comprises a controllable-impedance circuit adapted to be coupled in series with the LED light source. The controller adjusts the magnitude of the bus voltage to a target bus voltage and generates a drive signal for controlling the controllable-impedance circuit. To adjust the intensity of the LED light source, the controller controls both the magnitude of the load current and the magnitude of the regulator voltage. The controller controls the magnitude of the regulator voltage by simultaneously maintaining the magnitude of the drive signal constant and adjusting the target bus voltage. | 03-14-2013 |
| 20130076266 | LASER DIODE DRIVER DAMPING CIRCUIT - A damping circuit having an input terminal and an output terminal is described. The damping circuit comprises a driver having an input and an output; an RC circuit coupled between the input terminal and the output; and a resistor coupled between the output and the output terminal, wherein the RC circuit delays passing a signal from the output terminal to the input terminal and a low impedance associated with the driver generally reduces ringing. | 03-28-2013 |
| 20130088170 | DRIVING CIRCUIT OF LIGHT EMITTING DIODE AND LIGHT SOURCE APPARATUS - A driving circuit of a light emitting diode (LED) capable of receiving a power source to supply a driving current to an LED module is provided. The driving circuit includes a first current path and a second current path. The first current path includes a switch. The switch is disposed between the LED module and a terminal. The switch has a control terminal and receives a control signal through the control terminal so as to control whether the LED module is coupled to the terminal via the switch. The second current path is coupled between the LED module and the terminal. The second current path includes an impedance unit and is coupled to the first current path in parallel. | 04-11-2013 |
| 20130088171 | LED DRIVER HAVING NON-LINEAR COMPENSATION - A device driver which includes an input driver configured to produce a sequence of uncompensated drive signals along with compensation circuitry connected to receive the uncompensated drive signals and to produce corresponding compensated drive signals. The compensation circuitry is capable of storing two or less control points that define a single compensation curve such as a Bezier curve, with the compensation circuitry converting the uncompensated drive signals to the corresponding compensated drive signals utilizing the control points. An output driver is configured to drive a device such as one or more light emitting diodes to be connected to the output driver with the compensated drive signals. | 04-11-2013 |
| 20130088172 | SEMICONDUCTOR LIGHT SOURCE LIGHTING CIRCUIT - A circuit for lighting a semiconductor light source is provided. The circuit includes: a switching regulator including a switching element and configured to generate a drive current for the semiconductor light source using the switching element; and a control circuit configured to control on-off of the switching element such that the magnitude of the drive current comes close to a targeted value. The control circuit includes: a comparator configured to compare the magnitude of the drive current with the targeted value; an up/down counter configured to count a digital value in a counting-up direction or counting-down direction, based on a comparison result of the comparator; a digital-to-analog converter configured to convert the counted digital value into an analog signal; and a drive circuit configured to control on/off of the switching element based on the analog signal. | 04-11-2013 |
| 20130088173 | POWER SUPPLY DEVICE AND LIGHTING EQUIPMENT - In a power supply device according to one embodiment, a reference signal Vref | 04-11-2013 |
| 20130088174 | ORGANIC EL ELEMENT DRIVING DEVICE AND ORGANIC EL LIGHTING APPARATUS - An organic EL element driving device that drives an organic EL element with a constant current is provided. The organic EL element driving device includes a power supply connected in series with the organic EL element, and a current control unit connected in series with the organic EL element. The current control unit includes a current detection circuit having a resistor for detecting the value of the current passing through the organic EL element. The current control unit sets a prescribed value for the current to be passed through the organic EL element in accordance with the luminance control, and performs control such that the current passing through the organic EL element has the prescribed value in accordance with an output from the current detection circuit. A value of the resistor in the current detection circuit is varied in accordance with the luminance control. | 04-11-2013 |
| 20130093358 | DRIVING CIRCUIT OF LIGHT EMITTING DIODE AND GHOST PHENOMENON ELIMINATION CIRCUIT THEREOF - A driving circuit of a light emitting diode (LED) and a ghost phenomenon elimination circuit thereof are disclosed. The ghost phenomenon elimination circuit which includes a ghost phenomenon elimination unit and a counter unit may determine a black insertion period according to a gray scale clock signal, and output an enable signal to the ghost phenomenon elimination unit during the black insertion period. The ghost phenomenon elimination unit may pull up the voltage levels at current driving terminals of the driving circuit so as to prevent the ghost phenomenon from occurring. | 04-18-2013 |
| 20130099699 | POWER SUPPLY DEVICE - A power supply device containing a first board, a second board, an enclosure into which the first board and the second board are installed, a power supply unit which supplies power to an external load, a control circuit unit for controlling output current and/or output voltage from the power supply unit to the external load, the control circuit unit being embedded on the first board, a memory which stores control information, the memory being utilized in the control circuit unit for controlling the output current and/or the output voltage from the power supply unit, and an interface unit which is capable of receiving the control information from an external device and transmitting the control information to the memory, the interface unit being embedded on the second board which is physically separated from the first board. | 04-25-2013 |
| 20130106310 | SMART FET CIRCUIT | 05-02-2013 |
| 20130106311 | Power Supply Device and Lighting Device | 05-02-2013 |
| 20130113395 | DEVICE DRIVER PROVIDING COMPENSATION FOR AGING - Driving circuits are provided that compensate for devices having characteristics that change with age. A correction circuit has a reference device having an output that changes with age in a known manner over a time span similar to the expected lifetime of the driven device. The output of reference device provides an indication of the current age of driven device. | 05-09-2013 |
| 20130127371 | CMOS Bootstrap Circuit For DC/DC Buck Converter Using Low Voltage CMOS Diode - A modified bootstrap circuit utilized, for example, in a high voltage DC/DC CMOS buck converter to convert a high input voltage (e.g., 24V) to a regulated voltage (e.g., 4V) for use, for example, by an LED driver circuit. The bootstrap circuit utilizes a feedback diode and a PMOS switch to avoid high reverse diode voltages across a low voltage bootstrap diode. A bootstrapped buck converter implements the bootstrap circuit to generate a high gate voltage on a high-side NMOS switch during all operating phases. The PMOS switch is controlled by the NMOS switch's output voltage to pass a system voltage (e.g., 5V) through the bootstrap diode whenever the output voltage drops low (e.g., 0V), and to shut off when the output voltage subsequently rises such that the feedback diode forward biases to pass the output voltage to the anode of the bootstrap diode. | 05-23-2013 |
| 20130127372 | POWER SUPPLY FOR XENON LAMPS IN AN ACCELERATED WEATHERING TEST APPARATUS - A power supply for use in an accelerated weathering test apparatus can control both the xenon lamp radiated spectrum and its intensity in order to fully simulate the sun's daily cycle, improve the ultraviolet output, reduce the infrared radiation, and compensate for the xenon lamp aging. | 05-23-2013 |
| 20130141016 | LIGHTING APPARATUS AND ILLUMINATING FIXTURE WITH THE SAME - A control circuit selects a first control mode in which a switching element is turned on/off so as to flow current in an inductor in a continuous mode by which the current flows in the inductor without a sleep period, thereby fully lighting a light source load. The control circuit selects one of a second control mode in which a turn-on time of the switching element is changed and a third control mode in which an oscillating frequency is changed according to an interval, to which the designated dimming ratio corresponds, to light the light source load. An output capacitor connected between output terminals of a step-down chopper circuit smoothes a pulsation component of an output current supplied to the light source load and has capacity set so that a ripple ratio of the output current is less than 0.5 at the full lighting of the light source load. | 06-06-2013 |
| 20130141017 | LIGHTING APPARATUS AND ILLUMINATING FIXTURE WITH THE SAME - A control circuit selects a first control mode in which a switching element is turned on and off so that a current flows through an inductor in a critical or discontinuous mode, thereby fully lighting a light source load. The control circuit selects one of a second control mode in which On time of the switching element is changed and a third control mode in which an oscillating frequency is changed according to an interval, to which a designated dimming ratio corresponds, to dim the light source load. An output capacitor connected between output terminals of a step-down chopper circuit smoothes pulsation component of an output current supplied to the light source load and has capacity set so that a ripple ratio of the output current is less than 0.5 at full lighting of the light source load. | 06-06-2013 |
| 20130147393 | HIGH ACCURACY, HIGH DYNAMIC RANGE LED/LASER DRIVER - A current driver circuit, for driving a light source, that provides high accuracy and reduced power consumption is disclosed. The driver includes a digital to analog converter configured to receive a digital value representing a light intensity and convert the digital value to an analog current signal. A current minor is configured to receive the analog current signal and create a current minor output which is larger than the analog current signal based on a ratio of the current mirror. This results in a modified analog current signal. A light source receives the modified analog current signal, and responsive thereto generate a light signal such that the light signal has an intensity controlled by the digital value. One or more amplifiers are also part of the current driver and configured to increase response time and accuracy. | 06-13-2013 |
| 20130147394 | METHOD OF DETECTING AND CONTROLLING PERCEPTUAL FLICKER - A method and apparatus are provided for processing light from a light source. The method includes the steps of measuring a predetermined set of characteristics of the light source and detecting flicker when the predetermined set of characteristics exceed a corresponding flicker fusion threshold value. | 06-13-2013 |
| 20130154514 | VOLTAGE-CONTROLLED LIGHT DIFFUSING MODULE, FLASH LAMP MODULE AND CONTROLLING METHOD THEREOF BASED ON FACE INFORMATION - A voltage-controlled light diffusing module, a flash lamp module and a controlling method thereof are provided. The voltage-controlled light diffusing module includes a light diffuser, a driving circuit and an information processing unit. The information processing unit receives face information for deciding a driving voltage of the driving circuit, so as to change transmission of the light diffuser. | 06-20-2013 |
| 20130154515 | SYSTEMS AND METHODS OF APPLYING BLEED CIRCUITS IN LED LAMPS - A bleed circuit is applied to a transformer based on a bleed-on time and a bleed-off time determined by monitoring an output voltage waveform of the transformer. | 06-20-2013 |
| 20130154516 | SYSTEM AND METHOD FOR COLOR CREATION AND MATCHING - Systems and methods for controlling an output of a luminaire. The luminaire uses stored spectral information for light sources within the luminaire to determine a coordinate for each light source within a color space. A desired output color is also converted to a coordinate within the color space. The distance between the desired output color coordinate and each of the coordinates corresponding to the light sources is calculated to select initial control values for the light sources. The initial control values for each light source are individually modified by a step size value, the total output of the luminaire is calculated and converted to a coordinate within the color space, and the distance between the total luminaire output coordinate and the desired color coordinate is calculated. The control values for the light sources are iteratively modified until the luminaire output coordinate is within a threshold value of the desired color output. | 06-20-2013 |
| 20130154517 | Layered Dimmer system - A layered dimmer formed of different layers. The front layer may be a scattering layer, and the back layer may be a reflective layer. The light beam is scattered prior to reflecting, to avoid reflection back to form hotspots. | 06-20-2013 |
| 20130162174 | DRIVING CIRCUIT AND OPTICAL CONNECTOR HAVING SAME - A driving circuit for driving a light source of an optical connector includes a controller, an equalizer, a pseudo-random binary sequence (PRBS) generator, and a driver. The controller controls the driving circuit such that the light source is driven to emit by the driver according to an input signal sending into the equalizer for transmitting the input signal or a PRBS test signal generated by the PRBS generator for test a bit error rate of the optical connector. | 06-27-2013 |
| 20130162175 | DRIVE VOLTAGE GENERATION CIRCUIT FOR LIGHT EMITTING DIODE DISPLAY DEVICE AND METHOD FOR DRIVING THE SAME - A drive voltage generation circuit for an LED display device capable of increasing the input voltage range thereof is disclosed. The drive voltage generation circuit includes a booster that boosts an input voltage from an external source, to generate a boosted voltage, a protection switching element that controls whether or not the boosted voltage generated from the booster is to be output, in accordance with a switch control signal, a protection circuit that compares a level of the boosted voltage output from the booster via the protection switching element with a predetermined threshold voltage, selects one of a high voltage and a low voltage, based on a result of the comparison, and outputs the selected voltage as the switch control signal, and a discharger that discharges a low voltage node, to which the low voltage is applied. | 06-27-2013 |
| 20130169188 | BIDIRECTIONAL VOLTAGE DIFFERENTIATOR CIRCUIT - A bidirectional voltage differentiator circuit comprises start-up circuitry, sensing circuitry, and output circuitry coupled to logic circuitry. The start-up circuitry acts to start-up the sensing circuitry when the circuit is powered on, and accelerates the response of the sensing circuitry thereafter. The sensing circuitry senses variation in an input voltage applied to an input node. Responsive to the voltage variation sensed by the sensing circuitry, the output circuitry produces a state change at a first or second output node. The logic circuitry receives the states of the output nodes and produces a logic output signal to indicate the occurrence of the variation sensed in the input voltage. The voltage sensing circuit is operable to sense variation of the input voltage regardless of whether the voltage is rising or falling and without regard to the DC value of the input voltage. | 07-04-2013 |
| 20130169189 | Variable Operating Mode Solar Lighting System - A solar lighting system includes a record of a plurality of lighting profiles. The particular profile that governs the operation of the lights of the system at any given time is selected by each lighting element according to its determination of the time of year or season. The invention allows the more efficient use of solar energy collected at various time of the year. | 07-04-2013 |
| 20130169190 | LIGHT EMITTING DEVICE, DISPLAY DEVICE, LIGHT EMITTING COMPONENT DRIVER CIRCUIT, AND METHOD OF DRIVING LIGHT EMITTING COMPONENT - A light emitting device includes light emitting component sets, a voltage measurement circuit, a voltage generator, and a drive controller. The voltage measurement circuit is configured to measure voltages at connecting points between light emitting component lines and drive switches. The voltage generator includes a plurality of smoothing capacitors for the light emitting component sets, respectively. The voltage generator is configured to generate a drive voltage applied to the light emitting component sets using one of the smoothing capacitors. The drive controller is configured to select the smoothing capacitor corresponding to the light emitting component set, the measured voltage of which is the lowest among the light emitting component sets on which lighting control is performed to alter the drive voltage according to alteration of the lighting control. The drive controller is configured to control the voltage generator to generate the drive voltage using the selected smoothing capacitor. | 07-04-2013 |
| 20130175949 | LIGHT SOURCE SYSTEM CAPABLE OF ADJUSTING COLOR TEMPERATURE - A light source system capable of adjusting color temperature includes the steps: disposing at least one first and second LED (light emitting diode) chips on an electrical isolation substrate; disposing a first driving circuit and a second driving circuit on the electrical insulation substrate to electrically connected to the first and second LED chips; using at least one fluorescent plastic body containing fluorescent powder to cover the first LED chip; using a driving unit to generate a first driving signal and a second driving signal transmitted to the first and second driving circuits so as to drive the first and second LED chips to emit light; and using at least one transparent packaging plastic body to cover the fluorescent plastic body and the second LED chip to provide protection and second order optic. | 07-11-2013 |
| 20130181636 | Streetlight Controllers - The subject matter included in this disclosure can be embodied in an apparatus that includes a computing device having memory and a processor. The processor can be configured to establish a wireless connection with a streetlight controller that communicates with a streetlight, initiate transmission of a set of parameters related to commissioning the streetlight, and receive, from the controller, status and identification information associated with the streetlight. | 07-18-2013 |
| 20130187569 | INFLATABLE LAMP ASSEMBLY - The present invention discloses an inflatable lamp assembly a bladder and a light emitting apparatus that assembled together. The bladder includes a first bag portion, a second bag portion connected with an opening of the first bag portion, an air nozzle disposed on the firs bag portion, and a flange disposed at the opening of the second bag portion. The first bag portion and the second bag portion are co-formed an inflatable cell which is capable of being inflated and deflated by the air nozzle. The light emitting apparatus is received in a recess defined between the second bag portion and flange. As such, the light emitting apparatus can be firmly clamped in the recess when the inflatable cell is filled with air. | 07-25-2013 |
| 20130187570 | LIGHT EMITTING ELEMENT DRIVE DEVICE - A light emitting element drive device with PWM dimming includes an LED module, a power conversion circuit that supplies electric power to the LED module, a dimming switch element that performs an open/close operation for a path in which a current flows in the LED module, and a voltage detection circuit that detects a voltage value of a voltage that is output from the power conversion circuit. When the dimming switch element is turned ON, a control circuit performs feedback control so as to make a current value of the current close to a first target value. When the dimming switch element is turned OFF, the control circuit performs feedback control so as to make the voltage value close to a second target value. Wherein, the first target value is a predetermined value and the second target value is set based on the voltage value. | 07-25-2013 |
| 20130193877 | CIRCUITS AND METHODS FOR DRIVING LIGHT SOURCES - A dimming controller can operate in a first mode or a second mode to control dimming of a light-emitting diode (LED) light source. The dimming controller can include a voltage control terminal and a current control terminal. The voltage control terminal provides a pulse signal when the dimming controller operates in the first mode to operate a control switch in either a first state or a second state. A first current flowing through the LED light source increases when the control switch is in the first state and decreases when the control switch is in the second state. The voltage control terminal provides a control signal to the control switch to cut off the first current when the dimming controller operates in the second mode. The current control terminal conducts a second current through the LED light source when the dimming controller operates in the second mode. | 08-01-2013 |
| 20130193878 | LED-Lighting System Comprising an Operational Data Memory - The invention relates to an LED operating circuit in which a second module ( | 08-01-2013 |
| 20130193879 | Universal Dimmer - Various embodiments of a universal dimmer are disclosed. In one embodiment of a universal dimmer, a power limiting switch is connected to an input voltage. An output driver in the universal dimmer includes a power input and a load path, with the power input being connected to the input voltage. A variable pulse generator includes a control input and a pulse output, with the control input connected to a control input of the power limiting switch. The pulse output is connected to a control input of the power limiting switch. | 08-01-2013 |
| 20130193880 | Power Supply Device and Lighting Equipment Provided with Power Supply Device - A power supply device according to one embodiment is configured to control a lighting of semiconductor light-emitting elements, wherein a dimming signal is canceled during a predetermined time period (T) from a timing immediately after power-ON, so as to light on light-emitting diodes to have a predetermined light amount, for example, a minimum light amount. After an elapse of the predetermined time period (T), cancellation of the dimming signal is released to light on the light-emitting diodes to have a light amount instructed by the dimming signal. | 08-01-2013 |
| 20130200822 | DIMMING CIRCUIT AND METHOD FOR LEDS - A dimming circuit and method for a LED provide a first driving voltage or a second driving voltage according to a dimming signal provided by a functional IC to enable or disable the LED. The values of the first and second driving voltages are controlled so that overstressing of the LED is avoided while the functional IC is capable of working even when the LED is off. The LED's life time is thus prolonged. | 08-08-2013 |
| 20130214701 | SYSTEMS AND METHODS FOR LUMINESCENT DISPLAY - A ruggedized luminescent display system for displaying electronic images or light from a surface of an object, such as a boardsport medium, helmet medium, or protective clothing medium, for visibility enhancement. According to various aspects of the present invention, the object may comprise a resilient transmissive material disposed within a cavity of the object and may have a surface that is configured to be substantially flush with an outer surface of the object. A light source may be disposed within the object and may emit light through the resilient transmissive material such that the light may be visible from the outer surface of the object. The light source may be electrically coupled to an integrated circuit board with a control system comprising a microcontroller that may control the emission of light from the light source in response to a signal. The microcontroller may receive the signal from a motion sensor that may be electrically coupled to the integrated circuit board and configured to detect the motion of the object. The luminescent display system may be configured to indicate at least one or more of location, distance, direction and/or speed. The luminescent display system may be configured to illuminate environmental surroundings. | 08-22-2013 |
| 20130214702 | POWER CONVERTER WITH COMPENSATION CIRCUIT FOR ADJUSTING OUTPUT CURRENT PROVIDED TO A CONSTANT LOAD - A method for use in a power converter includes generating a peak input voltage signal that is representative of a peak value of the input voltage for phase angles less than a phase angle threshold and is representative of a value that is less than the peak value of the input voltage for phase angles greater than the phase angle threshold. The method also includes controlling a switching of a switch to regulate an output current of the power converter in response to the peak input voltage signal and the feedback signal. A compensation current is then added to the peak input voltage signal when the phase angle is greater than the phase angle threshold to allow for natural dimming at an output of the power converter. | 08-22-2013 |
| 20130221875 | LIGHT EMITTING DEVICE DRIVER CIRCUIT AND CONTROL METHOD THEREOF - The present invention discloses a light emitting device circuit and a control method thereof. The light emitting device circuit includes: a light emitting device control circuit, for converting an input voltage to an output voltage according to a control signal, wherein the output voltage is supplied to a light emitting device circuit; a voltage supply circuit, which is coupled to the light emitting device circuit, for generating a supply voltage from the output voltage; and a remote control circuit, which is coupled to the voltage supply circuit, for receiving the supply voltage, and generating the control signal according to a remote signal. | 08-29-2013 |
| 20130229131 | VOLTAGE MONITORING CIRCUIT - A voltage monitoring circuit includes: a ripple filter configured to output an output voltage from which a ripple component included in an input voltage, which is input from a voltage source, has been removed; a load configured to operate with the output voltage as a supply voltage and output a first signal through the operation; a comparator configured to compare an electric potential of the output voltage with an electric potential of the first signal and output a second signal when the electric potential difference is equal to or less than a predetermined threshold value; and a control circuit configured to reduce the electric potential of the first signal under the condition that the second signal is input thereto. | 09-05-2013 |
| 20130234621 | POWER SUPPLY THAT MAINTAINS AUXILIARY BIAS WITHIN TARGET RANGE - A power supply includes a switch configured to control flow of current output from an inductor to an output of the power supply. The switch receives a switching signal from a control circuit. An auxiliary bias is generated to power the control circuit. A bias circuit outputs a bias signal that is used to generate the auxiliary bias. The bias circuit senses a level of the auxiliary bias to control output of the bias signal. Output of the bias signal may be controlled to maintain the level of the auxiliary bias at a target level or within a target range. | 09-12-2013 |
| 20130234622 | LIGHT EMITTING DEVICE, AND ILLUMINATION APPARATUS AND SYSTEM USING SAME - A light emitting device includes multiple types of solid state light emitting elements having different peak wavelengths from each other; and a wavelength converter including phosphors that convert a wavelength of light emitted from each of the solid state light emitting elements. The phosphors include two or more of a first phosphor, a second phosphor, and a third phosphor. The first phosphor is excited by light emitted from a solid state light emitting element having a relatively long peak wavelength, and the second phosphor is excited by light emitted from a solid state light emitting element having a relatively short peak wavelength. The third phosphor is excited by light emitted from any of the solid state light emitting elements. | 09-12-2013 |
| 20130234623 | Constant Current Output Sink Or Source - A constant current output sink or source eliminates a current limiting series resistor for a light emitting diode (LED) and maintains a constant light intensity from the LED for all operating and manufacturing variables of a digital device since the current through the LED is maintained at a constant value. The constant current output sink or source may be programmable for selection of a constant current value from a plurality of constant current values available. | 09-12-2013 |
| 20130241441 | Adaptive Compensation for Effects of Cat-Ear Dimmers on Conduction Angle Measurement - A dimmable light emitting lamp configured to interface with cat-ear dimmer switches. The lamp includes one or more light emitting devices. The lamp also includes circuitry configured to receive an input voltage and provide regulated current to the one or more light emitting devices. The input voltage has a first voltage pulse that does not represent a dimming level of a dimmer switch and a second voltage pulse that represents the dimming level of the dimmer switch. The circuitry determines a first duration corresponding to a length of the first voltage pulse and a second duration corresponding to a length of the second voltage pulse responsive to first duration. The circuitry adjusts the regulated current to the light emitting devices according to the second duration to adjust output light intensity of the light emitting devices. | 09-19-2013 |
| 20130241442 | METHOD FOR CURRENT LIMITATION OF A LOAD CURRENT AND CIRCUIT HAVING CURRENT LIMITATION OF A LOAD CURRENT FOR A FLASH MEANS - The invention relates to a method for the current limitation of a load current, in particular the load current of a flash means. In one step, first a supply voltage (VBAT) is provided. Then a load current (I) is set depending on the supply voltage (VBAT) for supplying the flash means (LED) with power by incrementally reducing the load current (I) until the supply voltage (VBAT) is greater than a threshold value (Vlow). The load current intensity (Imin) of the set load current (I) can be stored in a register (RAM) for the subsequent triggering of the flash means (LED) in a main flash phase (2) with the load current intensity (Imin) stored in the register (RAM). In addition, the invention relates to a circuit having current limitation of a load current of a flash means. | 09-19-2013 |
| 20130249437 | ADAPTIVE FILTER FOR LED DIMMER - A dimming controller for an LED lamp controls dimming using an adaptive filter to reduce or eliminate perceivable flickering and to provide smooth transitions during active dimming. During stable conditions, the adaptive filter operates with a relatively narrow bandwidth to filter noise that may lead to perceivable flickering. During active or startup conditions, the adaptive mapping filter operates with a high bandwidth to provide a quick response to the dimmer switch. | 09-26-2013 |
| 20130249438 | EARLY WARNING STROBE FOR MITIGATION OF LINE AND LOAD TRANSIENTS - This document discusses apparatus and methods associated with an early warning strobe input of a boost converter. In an example, a method of increasing a set point of a boost converter configured to provide power to a mobile device can include receiving an indication that the mobile device will transition from the first low-power mode to a second higher-power mode; and increasing the set point of the boost converter in response to the indication. | 09-26-2013 |
| 20130249439 | Adaptive Current Regulation for Solid State Lighting - Representative embodiments provide an apparatus, system, and method for power conversion to provide power to solid state lighting, and which may be coupled to a first switch, such as a dimmer switch. A representative system for power conversion comprises: a switching power supply comprising a second, power switch; solid state lighting coupled to the switching power supply; a voltage sensor; a current sensor; a memory; a first adaptive interface circuit to provide a resistive impedance to the first switch and conduct current from the first switch in a default mode; a second adaptive interface circuit to create a resonant process when the first switch turns on; and a controller to modulate the second adaptive interface circuit when the first switch turns on to provide a current path during the resonant process of the switching power supply. | 09-26-2013 |
| 20130264968 | Power Converter Having an Advanced Control IC - There are disclosed herein various implementations of a power converter having an advanced control integrated circuit (IC). The power converter includes the control IC and a power switch. The control IC includes a driving stage for driving the power switch, and a sensing stage coupled to the driving stage. The sensing stage is configured to produce a control signal for the driving stage based on an output current of the power converter sensed at a high side bus of the power converter. | 10-10-2013 |
| 20130264969 | POWER SUPPLY CONTROL SYSTEM AND DEVICE - Power supply control system for a switching-mode power supply with cycle by cycle, asynchronous control scheme, making use of simulated electronic logic gates for the logical switching means and further including assimilation and artificial intelligence neural control network, such as a perceptron, to determine the electronic simulation and to make use of a mixing of instant and average signals through a feedback system. | 10-10-2013 |
| 20130271034 | LED DRIVING CIRCUIT - A light-emitting diode (LED) driving circuit includes a constant current module, a current follower module and a LED indicator. The constant current module is connected to a power supply output for stabilizing the output current from the power supply at a preset value. The current follower module is connected between the constant current module and the LED indictor for further stabilizing the current output from the constant current module. The LED driving circuit makes sure the current through the LED indicator invariable, thereby keeping brightness of the LED indicator invariable. | 10-17-2013 |
| 20130271035 | SYSTEMS AND APPARATUSES INCLUDING ALTERABLE CHARACTERISTICS AND METHODS OF ALTERING AND COORDINATING SUCH CHARACTERISTICS - Systems, apparatuses, and methods are provided that include alterable characteristics and such alterable characteristics may be coordinated. Such systems, apparatuses, and methods may include wearable apparatuses and such alterable characteristics may relate to illumination conditions. In one example, a wearable apparatus includes an illumination device that may be manually manipulated between two different illumination conditions. In another example, two wearable apparatuses may each include an illumination device and operation of the two illumination devices may be coordinated. In a further example, operation of an apparatus may be controlled by a third party or venue. Still another exemplary system may include a capturing device for capturing a characteristic of an object and controlling an output device of an apparatus to operate with the same characteristic as the captured characteristic. | 10-17-2013 |
| 20130271036 | PROGRAMMABLE LUMINAIRE SYSTEM - A system comprising a luminaire, a computerized device, and a docking member establishing electrical communication between the luminaire and the computerized device is disclosed. The luminaire may include an optic, a light source, a controller operably coupled to the light source, and an electrical connector configured to couple with the dock. The light source may be operable to emit light having a variety of characteristics, such as luminous intensity, color, color temperature, and any other characteristics of light. The controller may be programmable by a signal received from the computerized device via the dock. | 10-17-2013 |
| 20130271037 | CURRENT CONTROLLING DEVICE AND ELECTRIC FIELD EMISSION SYSTEM INCLUDING THE SAME - Provided is a current controlling device for controlling an electric field emission current in connection with an electric field emission device which emits electrons in response to an applied voltage, the device including: a first current controlling transistor forming a current path in response to a first gate voltage; a second current controlling transistor connected between the field emission device and the first current controlling transistor and forming a current path in response to a second gate voltage; and a control logic controlling the first and second gate voltages, wherein the control logic controls a upper limit of the field emission current by using the first gate voltage. | 10-17-2013 |
| 20130271038 | Managing SSL Fixtures Over PLC Networks - Managing solid-state luminary (SSL) fixtures over power line carrier (PLC) networks is described herein. Devices provided in this description include SSL arrays, and converter circuitry coupled to drive the SSL arrays. More specifically, the converter circuitry is adapted to convert input voltage received from a power distribution network into a level suitable for driving the SSL arrays. The devices also include (PLC) modems for coupling to PLC networks, and coupled to the converter circuitry. In particular, the PLC modems interface the converter circuitry to the PLC networks. | 10-17-2013 |
| 20130271039 | LIGHTING DEVICE - In a memory of a lighting device, correspondence relations among an initial output, a target output and time required for reducing brightness from the initial output to the target output are stored in advance. When the initial output and the target output are designated, the time necessary for brightness reduction is specified from the correspondence relation, and the light emission output is reduced at such a change rate that the light emission output has a linear relation with respect to elapsed time from the initial output to the target output in a specified time, on a semi logarithmic graph in which the ordinate is a logarithmic axis representing light emission output and the abscissa is a linear axis representing time. | 10-17-2013 |
| 20130271040 | METHOD AND APPARATUS TO LIMIT CURRENT OVERSHOOT AND UNDERSHOOT IN LIGHT DRIVER - A light driver having a primary side driver configured to convert an input from a mains power supply to a primary side output, and a secondary side driver coupled to the primary side driver and configured to rectify and filter the primary side output to provide a driver output current for driving a light load. A microcontroller controls the light driver at start-up so that the secondary side driver is powered-on and the primary side driver is in a non-powered state during a soft-start period, and subsequent to the soft-start period the secondary side driver is set to be in a low output state when powered-on and thereafter set to a state so that driver output current of the secondary side driver increases the light output from the light load from an initial dim level to a nominal dim level without flicker. | 10-17-2013 |
| 20130278177 | METHOD AND APPARATUS WITH LIGHTING SYSTEM FOR BREWING INGREDIENTS IN A SOLVENT - The invention relates to a method and an apparatus for brewing ingredients in a solvent, said apparatus comprising: a container for containing said ingredients; a sensor for measuring a characteristic of said solvent; a lighting system ( | 10-24-2013 |
| 20130285575 | Backlight circuit control method, backlight circuit and booster circuit - A method for controlling a backlight circuit, a backlight circuit and a boost circuit are provided by the present invention. The method comprises: acquiring a current backlight brightness level of a terminal; determining a minimum voltage required by a Light Emitting Diode (LED) to reach the backlight brightness level; and regulating a boost circuit to provide the minimum voltage for the LED. By way of the present invention, the endurance ability of the terminal is improved. | 10-31-2013 |
| 20130293154 | LIGHT EMITTING ELEMENT DRIVING CIRCUITS WITH DIMMING FUNCTION AND CONTROL METHODS THEREOF - A controller used in a light emitting element driving circuit, wherein the light emitting element driving circuit has a power converter configured to provide an output current for the light emitting element. The controller has a dimming processing unit and a current control unit. The dimming processing unit is configured to receive a first dimming signal with a first duty cycle and a second dimming signal with a second duty cycle, and to generate a second dimming processing signal relative to the product of the first duty cycle and the second duty cycle. The current control unit is coupled between the dimming processing unit and the power converter, and is configured to generate a control signal for the power converter based on the second dimming processing signal and a feedback signal indicating the output current. | 11-07-2013 |
| 20130293155 | POWER LINE NON-LIGHTING APPLICATION CONTROLLER SYSTEM AND METHOD - In some examples, non-lighting application controller technology includes methods and apparatuses. In other examples, the technology includes a non-lighting application controller system. The system includes one or more light fixtures. Each light fixture of the one or more light fixtures has one or more non-lighting elements, such as a speaker, alarm, motor, and camera. Each light fixture of the one or more light fixtures is electrically coupled via a power line. Each light fixture of the one or more light fixtures includes a conversion module configured to convert instructions between power line communication and non-lighting control communication, a communication module configured to communicate the power line communication over the power line, and a non-lighting element controller configured to control the one or more non-lighting elements in a respective light fixture based on the instructions. | 11-07-2013 |
| 20130300316 | GESTURAL CONTROL DIMMER SWITCH - A gestural control dimmer switch for controlling the illumination level of a light using hand movements comprises a dimmer panel in operative communication with a light, the dimmer panel having a plurality of hand position sensors corresponding to a spectrum of illumination levels of the light, wherein when a hand is detected by the hand position sensors the illumination level of the light is set until the hand reaches a dimmer trigger position when the switch enters a dimming mode during which the illumination level is adjusted to the illumination level corresponding to the hand position sensor the presence of the hand is detected until a release condition is satisfied. | 11-14-2013 |
| 20130314002 | DIGITAL PHASE ANGLE DETECTION AND PROCESSING - Apparatus and methods operate to perform digital time sampling of a waveform associated with a rectified alternating current, edge-controlled power signal, whether leading or trailing edge-controlled. A dimming code (DIM code) is generated based upon rising and falling edge zero crossing timing. The DIM code is normalized with respect to an allowable edge control window synchronized with the waveform. A minimally-dimmed waveform results in a maximum DIM code corresponding to a full-scale DAC maximum brightness analog output signal. The DIM code is loaded into a DAC to be converted to an analog brightness signal. The analog brightness signal may be used by a lighting power controller to control the brightness of one or more lighting elements. Accurate and repeatable light intensities independent of dimmer type may result. | 11-28-2013 |
| 20130314003 | DRIVING CIRCUIT FOR BACKLIGHT LED - A driving circuit for backlight LED comprises a power input, a control module, a voltage promotion module and a filter circuit module. The filter circuit is connected between the power input and the voltage promotion module. The filter circuit module is configured to filter ripple voltage signals from the power source and periodic voltage echo wave signals from the voltage promotion module to eliminate the “water wave” on a LCD display. | 11-28-2013 |
| 20130320881 | CURRENT OVERSHOOT LIMITING CIRCUIT - This document discusses, among other things, an apparatus, system, and method to limit a current overshoot in an electronic component using a switched feedback circuit to precondition a gate of a transistor coupled to the electronic component. | 12-05-2013 |
| 20130320882 | INTEGRATED ON-TIME EXTENSION FOR NON-DISSIPATIVE BLEEDING IN A POWER SUPPLY - An example controller for a switched mode power supply includes a zero crossing detector, drive logic, and a logic gate. The zero-crossing detector generates a zero-crossing signal indicating a zero-crossing condition in the power supply. The drive logic generates a drive logic output signal in response to the zero-crossing signal and in response to a feedback signal, where the drive logic output signal is representative of an on-time of a switch to regulate an output of the power supply. The logic gate is coupled to receive a first signal representative of a current through the switch and a second signal representative of a zero-crossing time threshold. The logic gate is further coupled to extend the on-time of the switch until current through the switch reaches a zero-crossing current threshold or until the on-time of the switch reaches the zero-crossing time threshold. | 12-05-2013 |
| 20130320883 | DEVICE AND METHOD FOR INTERFACING A DIMMING CONTROL INPUT TO A DIMMABLE LIGHTING DRIVER WITH GALVANIC ISOLATION - A dimmer interface ( | 12-05-2013 |
| 20130320884 | DRIVE DEVICE FOR LIGHT-EMITTING ELEMENT - A drive device for a light-emitting element that improves accuracy while driving the light-emitting element at small currents for which a comparatively simple configuration is provided. The drive device includes detecting means, comparing means, a driving voltage source, and offset means. The detecting means detects a voltage corresponding to a current flowing through a first resistor for current detection. The first resistor is coupled to a light-emitting element in series. The comparing means compares a magnitude of the detection voltage of the detecting unit with a comparison voltage. The driving voltage source applies a voltage corresponding to a comparison result by the comparing means to a series circuit of the light-emitting element and the first resistor. The offset means corrects the voltage corresponding to a current flowing through the first resistor by a correction voltage. | 12-05-2013 |
| 20130328504 | OPTICAL WAVEFORM GENERATOR - An optical high speed Arbitrary Waveform Generator (AWG) comprising a trigger module configured to receive binary signals and generate a trigger output in response, a digital waveform shaper (DWS) module configured to be programmed by a digital waveform and convert it to analog waveform, an amplifier module configured to amplify the analog waveform, a load adapter module configured to match the electrical impedance of the amplifier module to the electrical impedance of a light source, a TEC controller and a voltage supply module adapted to supply voltage to the trigger module, the digital waveform shaper module, the amplifier module, and the load adapter and the TEC controller. | 12-12-2013 |
| 20130328505 | Dimmer for Dimmable Drivers - A dimmer for dimmable drivers. | 12-12-2013 |
| 20130334985 | OUTPUT BUFFER CIRCUIT, DEVICES INCLUDING THE SAME, AND OPERATING METHOD OF THE OUTPUT BUFFER CIRCUIT - An output buffer circuit includes an amplifier and a transmission circuit. The amplifier includes a plurality of inputs and an output. The inputs provide first input signals and second input signals to the amplifier. The output provides an output signal as a first input signal of the first input signals to the amplifier. The transmission circuit has an input coupled to the output of the amplifier and further has an output that provides a transmission circuit output signal as a second input signal of the second input signals to the amplifier. | 12-19-2013 |
| 20140001979 | LEADING-EDGE PHASE-CUT BLEEDER CONTROL | 01-02-2014 |
| 20140001980 | CIRCUIT AND METHOD FOR DRIVING LED LIGHT | 01-02-2014 |
| 20140009084 | Forward Converter Having a Primary-Side Current Sense Circuit - A load control device for controlling the amount of power delivered to an electrical load (e.g, an LED light source) comprises an isolated forward converter comprising a transformer, a controller, and a current sense circuit operable to receive a sense voltage representative of a primary current conducting through to a primary winding of the transformer. The primary winding is coupled in series with a semiconductor switch, while a secondary winding is adapted to be operatively coupled to the load. The forward converter comprises a sense resistor coupled in series with the primary winding for producing the sense voltage that is representative of the primary current. The current sense circuit receives the sense voltage and averages the sense voltage when the semiconductor switch is conductive, so as to generate a load current control signal that is representative of a real component of a load current conducted through the load. | 01-09-2014 |
| 20140009085 | Load Control Device for a Light-Emitting Diode Light Source - A load control device for controlling the intensity of a light source (e.g., a light-emitting diode light source) reduces visible flickering in the light source when a target intensity of the light source is dynamically changing. The load control device includes a load regulation circuit operable to conduct a load current through the electrical load and to control the amount of power delivered to the electrical load. The load control device also includes a controller for adjusting the average magnitude of the load current to a target current. The controller pulse-width modulates the magnitude of the load current between a first current less than the target current and a second current greater than the target current. When the target current is dynamically changing, the controller is operable to adjust to the average magnitude of the load current towards the sum of the target current and a supplemental signal. | 01-09-2014 |
| 20140009086 | SINGLE-STAGE POWER SUPPLY WITH POWER FACTOR CORRECTION AND CONSTANT CURRENT OUTPUT - An example power supply includes an energy transfer element, a switch, and a controller. The switch is coupled to the energy transfer element to control a transfer of energy from an input to a galvanically isolated output of the power supply. The controller includes a delayed ramp generator, an integrator, an arithmetic operator, and a drive signal generator. The integrator generates a first signal responsive to integrating an input current of the power supply. The arithmetic operator generates a second signal responsive to the first signal and responsive to a ratio of a rectified input voltage to a dc output voltage of the power supply. The drive signal generator generates a drive signal in response to a delayed ramp signal and the second signal to control switching of the switch to provide power factor correction of the power supply and to provide a regulated current at the output. | 01-09-2014 |
| 20140021885 | Integrated LED Dimmer Controller - An integrated LED controller drives and reads a passive dimmer and controls a power circuit for the LED. The integrated LED controller detects changes in the position of the passive dimmer and causes the power circuit to brighten or dim the LED accordingly. These functions are normally performed by multiple discrete components. However, the integrated LED controller is implemented as a single integrated circuit, thus reducing the size and cost of the LED dimming system. The integrated LED controller can also include a unified timing controller that coordinates the timing of multiple functions within the controller in a manner that reduces the noise sensitivity of the controller. | 01-23-2014 |
| 20140035486 | LIGHTING DEVICE, LIGHTING FIXTURE, LAMP, AND SOUND EMISSION PREVENTION METHOD - A lighting device including: a lighting circuit; a drive circuit; a dimmer control circuit; and an LPF, the drive circuit for increasing on-time as a pulse height increases when an inputted PWM signal satisfies a first condition where a pulse height is greater than a first threshold and less than a second threshold greater than the first threshold, and making the on-time for which a switching element is on when the switching element turns on and off once in a burst period, constant in a second condition where the height pulse is greater than the second threshold, the LPF generating a smoothed | 02-06-2014 |
| 20140035487 | Illuminating Device - To a constant-current power supply whose output current can be variably set, light emitting modules can be connected in parallel. A control unit recognizes connection information outputted from an information output unit provided in each of the light emitting modules and varies the output current of the constant-current power supply. Drive can be controlled in response to a state of the connected light emitting modules such as the connecting number of light emitting modules. | 02-06-2014 |
| 20140035488 | OLED LUMINANCE DEGRADATION COMPENSATION - A system and method are disclosed for determining a pixel capacitance. The pixel capacitance is correlated to a pixel age to determine a current correction factor used for compensating the pixel drive current to account for luminance degradation of the pixel that results from the pixel aging. | 02-06-2014 |
| 20140042932 | LINEAR WALK ARRANGEMENT - Representative implementations of devices and techniques provide a linear walk arrangement for a control signal. A modified clock signal is used to increment or decrement a value of the control signal toward a target value. The modified clock signal is based on a specified transition time and a difference between an initial value for the control signal and the target value. Multiple control signals may be transitioned such that the control signals arrive at their respective target values simultaneously, notwithstanding the differences in transitions among the control signals. | 02-13-2014 |
| 20140042933 | Apparatus and Method for Dimming Signal Generation for a Distributed Solid State Lighting System - Exemplary systems, methods and apparatuses for providing dimming in a distributed solid-state lighting system are disclosed. An exemplary dimming signal generator is coupleable to a controller or a current generator for a plurality of LEDs, and includes a first resistive voltage divider to sense an input DC voltage; a current sensor to sense a current level of the plurality of LEDs; a first operational amplifier to compare the sensed input DC voltage to a reference voltage level and to provide a comparator output signal; and a current path to combine the comparator output signal with the sensed LED current level to provide a combined signal for current level feedback for control of the LED current level. The dimming signal generator may optionally include other components to generate a PWM signal and also to provide a resistive network to divert LED current in response to the comparator output signal. | 02-13-2014 |
| 20140049190 | LASER INTERLOCK SYSTEM FOR MEDICAL AND OTHER APPLICATIONS - A laser interlock system and allows laser radiation to be generated when an inspector and a subject correctly wear safety glasses and during use of a photo-acoustic imaging apparatus, thereby protecting the eyes of the inspector and the subject and preventing unnecessary power consumption. The laser interlock system includes a sensing unit to sense whether or not contact between a user and safety glasses occurs, a light source unit to generate a laser, and a control unit that determines, based on an output value from the sensing unit, whether or not the user is wearing the safety glasses normally, and generates an interlock signal to turn on or off the light source unit for selective laser generation according to the determination. | 02-20-2014 |
| 20140049191 | TUNABLE LED LAMP FOR PRODUCING BIOLOGICALLY-ADJUSTED LIGHT - A tunable LED lamp for producing biologically-adjusted light having a housing, a power circuit, a driver circuit disposed within the housing and electrically coupled with the power circuit, and a plurality of LED dies electrically coupled to and driven by the driver circuit. The driver circuit may drive the plurality of LED dies to emit a phase-shift light having a first spectral power distribution, a general illuminating light having a second spectral power distribution, and a pre-sleep light having a third spectral power distribution. The phase-shift light may be configured to affect a first biological effect in an observer, and the pre-sleep light may be configured to affect a second biological effect in an observer. The LED lamp may include an intermediate base to couple the lamp to an Edison screw base. The LED lamp may be configured to operate responsive to a three-way switch. | 02-20-2014 |
| 20140049192 | TUNABLE LED LAMP FOR PRODUCING BIOLOGICALLY-ADJUSTED LIGHT - A tunable LED lamp for producing biologically-adjusted light having a housing, a power circuit, a driver circuit disposed within the housing and electrically coupled with the power circuit, and a plurality of LED dies electrically coupled to and driven by the driver circuit. The driver circuit may drive the plurality of LED dies to emit a phase-shift light having a first spectral power distribution, a general illuminating light having a second spectral power distribution, and a pre-sleep light having a third spectral power distribution. The phase-shift light may be configured to affect a first biological effect in an observer, and the pre-sleep light may be configured to affect a second biological effect in an observer. The LED lamp may be configured to fit in a troffer fixture. The LED lamp may also be a troffer fixture. | 02-20-2014 |
| 20140062338 | Lighting Control Device - A lighting control device can include a control module and a processing module. The control module can provide a driving signal. The driving signal can modify a control voltage on a control interface. The control voltage can control a controllable ballast or driver. The processing module can determine a duty cycle of the driving signal. The control module and the processing module can receive power via the control interface and a power supply on the control device. | 03-06-2014 |
| 20140062339 | Lighting Device - A technology is provided for communicating with a microprocessor that is powering a plurality of light emitting diodes (LEDs). Information bits may be received at a microprocessor circuit coupled to the plurality of LEDs. The microprocessor may be capable of receiving voltage from a voltage source. A code sequence may be identified using the information bits. The code sequence may be associated with an action to be performed with the plurality of LEDs. The code sequence may be decoded, at the microprocessor, so that the action can be performed with the plurality of LEDs. | 03-06-2014 |
| 20140070727 | CIRCUIT AND METHOD FOR DRIVING LEDS - A circuit for driving light emitting diodes (LEDs) includes a first semiconductor switch and a freewheeling device coupled between a first supply terminal that provides a supply voltage and a second supply terminal that provides a reference potential. The first semiconductor switch is responsive to a driver signal. An LED and an inductor are coupled in series between a common circuit node of the first semiconductor switch and the freewheeling device and either the first supply terminal or the second supply terminal. A current measurement circuit is coupled to the LED and provides a load current signal which represents a load current passing through the at least one LED. A first feedback circuit includes an on-off controller that receives load current signal and a reference signal. | 03-13-2014 |
| 20140070728 | Circuit and Method for Driving LEDs - A circuit for driving light emitting diodes includes a first semiconductor switch that is responsive to a driver signal and a freewheeling device coupled between a first supply terminal that provides a supply voltage and a second supply terminal that provides a reference potential. An LED and an inductor are coupled in series between a common circuit node of the first semiconductor switch and the freewheeling device and either the first supply terminal or the second supply terminal. A current measurement circuit is coupled to the LED and provides a load current signal that represents a load current passing through the at least one LED. A first feedback circuit includes an on-off controller that receives load current signal and a reference signal, compares the load current signal with the reference signal and generates the driver signal dependent on the comparison. | 03-13-2014 |
| 20140070729 | ILLUMINATION APPARATUS AND STORAGE MEDIUM - There is provided an illumination apparatus including an illumination unit, a reception unit, and a control unit configured to control illumination of the illumination unit in accordance with a default illumination pattern. When the reception unit receives an illumination pattern, the control unit performs illumination control different from the illumination according to the default illumination pattern. | 03-13-2014 |
| 20140070730 | ARC MANAGEMENT WITH VOLTAGE REVERSAL AND IMPROVED RECOVERY - Systems and methods for arc handling in plasma processing operations are disclosed. The method includes providing current with a power supply to a plasma load at a first voltage polarity and energizing an energy storage device so when it is energized, the energy storage device applies a reverse polarity voltage that has a magnitude that is as least as great as the first voltage polarity. When an arc is detected, power is applied from the energy storage device to the plasma load with a reverse polarity voltage that has a polarity that is opposite of the first voltage polarity, the application of the reverse polarity voltage to the plasma load decreases a level of the current that is provided to the plasma load. | 03-13-2014 |
| 20140077724 | LOAD DRIVING DEVICE AND LED LIGHTING APPLIANCE THEREWITH - A load driving device has a switch N | 03-20-2014 |
| 20140084812 | DEVICE AND METHOD FOR LIGHT ADJUSTING FOR A LARGE-SCALE PARKING - An approach is provided for a device and a method for light adjusting that adjust illumination output based on the environment statues, which comprises a power supply, at least one detector, and at least one controller. The detector is configured for detecting an object in a detecting region. The controller is coupled to the power supply, the detector and a LED lamp, and is configured to provide adaptive power to the LED lamp based on the detections of the detector, wherein the controller provides a high voltage to the LED lamp when the object is detected by the detector. Therefore, it is able to reduce electricity consumption especially for a place requiring long term illumination. | 03-27-2014 |
| 20140084813 | POWER SUPPLY DEVICE AND LUMINAIRE - A power supply device includes a control circuit and a first circuit. The control circuit switches between a current control mode and a voltage control mode according to an inputted dimming signal and thus dims a light-emitting element. In the current control mode the control circuit controls an output current supplied to the light-emitting element to a target current, and in the voltage control mode the control circuit controls an output voltage supplied to the light-emitting element to a target voltage. The first circuit detects the output current and the output voltage, and sets the target voltage at which switching between the current control mode and the voltage control mode is carried out as a first voltage. | 03-27-2014 |
| 20140091732 | TRANSIENT POWER COMMUNICATION - A power supply system providing communication from a master module to at least one slave module via transients, to alter operation of a load, is provided. The master module output a supply voltage that is either a normal supply voltage or a reduced supply voltage. The outputted supply voltage depends on input corresponding to a communication to be sent to the slave module to alter operation of the load of the slave module. The slave module receives the supply voltage and interprets the received supply voltage, which may vary between the normal and reduced supply voltages, to determine what the communication from the master module is. The slave module then uses information from the communication to appropriately alter operation of its load. | 04-03-2014 |
| 20140091733 | LIGHT EMITTING DIODE LIGHTING DEVICE WITH TUNABLE DUTY CYCLES - This disclosure provides a smart lighting apparatus. The lighting device includes a power input device and an insertion slot. The power input device is electrically connected to a light source, and the insertion slot is installed between the light source and the power input device for receiving the smart card to manage the lighting device. The smart card has a power source and an ecosystem dimming device electrically connected with to the power source. The ecosystem dimming device controls the luminance of the light source with power-saving efficiency. | 04-03-2014 |
| 20140103837 | LIGHTING APPARATUS - Of the various technological features disclosed in the present specification, a structure according to the one technological feature is as follows. A lighting apparatus changeable between an illuminating state and a non-illuminating state comprising: a non-contact motion sensor arranged to sense a movement of a hand near the lighting apparatus; and a controller arranged to control the lighting apparatus in the non-illuminating state to change from the non-illuminating state to the illuminating state in response to the movement of hand sensed by the non-contact motion sensor, and to control the lighting apparatus in the illuminating state to cause a change in illumination with the illuminating state kept in response to the same movement of hand sensed by the non-contact motion sensor. | 04-17-2014 |
| 20140103838 | ADAPTIVE DIMMER DETECTION AND CONTROL FOR LED LAMP - An LED lamp is provided in which the output light intensity of the LEDs in the LED lamp is adjusted based on the input voltage to the LED lamp. A dimmer control unit detects a type of dimmer switch during a configuration process. Using the detected dimmer type, the dimmer control unit generates control signals appropriate for the detected dimmer type to provide regulated current to the LEDs and to achieve the desired dimming effect. The LED lamp can be a direct replacement of conventional incandescent lamps in typical wiring configurations found in residential and commercial building lighting applications that use conventional dimmer switches. | 04-17-2014 |
| 20140117878 | MERGED-STAGE HIGH EFFICIENCY HIGH POWER FACTOR HB-LED DRIVER WITHOUT ELECTROLYTIC CAPACITOR - The present application relates to boost-resonant converter for driving high brightness LEDs (HB LED) that incorporates power factor correction (PFC) and does not require a bulky electrolytic capacitor. The new converter incorporates the PFC and the LED supplies into a single stage. The system allows a large voltage ripple across the intermediate energy storage capacitor reducing its value. Constant light output and dimming capability are obtained by variable frequency current control of the resonant converter. A high power factor is achieved by DCM boost front-end portion with controlled average output voltage. The converter is regulated by a digital controller that implements a variable-frequency variable duty ratio algorithm. Experimental results with a 15 W prototype verify near unity power factor operation, above 88% efficiency and constant lamp current over the entire operating range. | 05-01-2014 |
| 20140117879 | ENERGY SAVING MOUSE - A energy saving mouse includes a switch module, a sensing module, a light-emitting diode, a control module, and a detection circuit. The sensing module and the detecting circuit output corresponding signals to the control module according to whether the energy saving mouse is in use or not in use. The control module controls the switch module to selectively supply power to the sensing module or to the light-emitting diode and the detection circuit. | 05-01-2014 |
| 20140117880 | DISCHARGE LAMP OPERATING APPARATUS - A discharge lamp operating apparatus including: a discharge lamp; an operating circuit; a voltage measuring unit; a magnetic field applying unit; and a control unit, wherein the voltage measuring unit measures the voltage of power at sampling intervals, the control unit calculates an average value VL | 05-01-2014 |
| 20140125251 | FLAT PANEL ELECTRONIC DEVICE AND CURRENT CONTROL SYSTEM THEREOF - Embodiments of the present invention provide a flat panel electronic device and a current control system thereof. The current control system comprises: a detecting module for detecting a current in a main circuit of the flat panel electronic device; and a control mechanism for reducing a brightness level of a backlight unit of the flat panel electronic device when the current in the main circuit is larger than or equal to a threshold so that the current in the main circuit is reduced to be less than the threshold. The current control system provided by the present invention reduces the current in the main circuit by reducing the brightness level of the backlight unit. Therefore, it is able to reduce the processing time by more than 10 ms compared with the prior art, and the fast and effective response is an important factor for extending the life of the battery. | 05-08-2014 |
| 20140125252 | DIMMING FOR CONSTANT CURRENT LED DRIVER CIRCUIT - An illustrative LED driver circuit includes dimming control of the LED lamp. The circuit uses flyback converter topology, a power factor correction (PFC) primary side controller, a secondary side controller that includes current control and voltage control regulation, and an dimming control circuit. The dimming control circuit includes a selectable dimming control signal added together with a sensed current output signal to provide a control signal supplied to the secondary controller for output current control. | 05-08-2014 |
| 20140125253 | LED BALLAST CONTROLLER DEVICE - A device and method to interface with a Magnetic or Electronic Fluorescent Ballast; evaluate, process, and regulate the incoming power from the Ballast device and output a steady AC power that can be used by LED drivers, LED chips, or set of multiple LED chips in a Tube or Bulb application. This device and method will allow for a non-fluorescent replacement lighting device such as a LED Lighting Tube or Bulb to be used in a Fluorescent Light Luminaire (fixture) without any electrical wiring modification or removal of the Electronic or Magnetic Ballast. | 05-08-2014 |
| 20140132184 | Power Supply Circuit with a Control Terminal for Different Functional Modes of Operation - A method of operation for flyback power converter includes operating a controller of the flyback power converter in a regulation mode when a control signal is below a first threshold. The control signal is provided as an input to a terminal of the flyback power converter. When the control signal is below a second threshold and above the first threshold, the controller is operated in a limiting mode. The controller is operated in an external command mode when the control signal is below a third threshold and above the second threshold. Lastly, when the control signal is above the third threshold, the controller is operated in a protection mode. | 05-15-2014 |
| 20140139141 | Method Of Interfacing With A Portable Light - A method for using a directional switch on a portable light where the switch input is interpreted according to the switch position relative to gravity. | 05-22-2014 |
| 20140139142 | Single Phase Bridgeless Boost Converter for LED Lighting Applications - A circuit serving as a power source for light-emitting diode (LED) lighting applications, the circuit comprising a boost converter comprising a pair of boost field-effect transistors (FETs) and a boost inductor coupled to the pair of boost FETs, wherein an input voltage feeding the boost converter has a sinusoidal waveform, and wherein a half cycle of the input voltage is represented by a plurality of time slices, and a controller coupled to the boost converter and configured to determine a current time slice in the plurality of time slices, generate one or more output signals based at least in part on the current time slice and without a need to compute any multiplier function involving the input voltage, and control states of the boost FETs using the one or more output signals. | 05-22-2014 |
| 20140145645 | STEP-DIMMING LED DRIVER AND SYSTEM - A dimming control circuit for an LED module includes an LED driver configured to provide an output voltage that is used to drive the LED module, a voltage divider coupled to the output voltage, and a dimming control module coupled to the voltage divider. The dimming control module configured to change a resistance of the voltage divider to reduce the output voltage from the LED driver and dim the LED module. | 05-29-2014 |
| 20140145646 | LED VOLTAGE ADJUSTMENT DEVICE AND DRIVE SYSTEM THEREOF - The present invention provides LED voltage adjustment device and drive system thereof. The device includes PI regulator, with negative terminal connected to negative terminal of LED light bar to receive negative terminal voltage of light bar and positive terminal of PI regulator being for receiving reference voltage; integrator, for performing integral on output signal of PI regulator; a subtractor, with positive input terminal receiving output signal from PI regulator and negative terminal receiving overcurrent protection detection voltage from boost converter for driving light bar, and subtracting overcurrent protection detection voltage from output signal of PI regulator; comparator, with positive terminal receiving output signal from integrator and negative terminal receiving output signal from subtractor; and integrated circuit (IC) module, for receiving output signal from comparator and based on received output signal to control a control signal to conduct or cut off switch transistor of boost converter. | 05-29-2014 |
| 20140159614 | Methods and Apparatus for Improving Backlight Driver Efficiency - An electronic device may be provided with display circuitry that includes a display timing controller, a backlight driver, a light source, and other associated backlight structures. The backlight control circuitry may generate a control signal having an adjustable duty cycle to the backlight driver. The backlight driver may include a boost converter, a current driver, and backlight control circuitry. The current driver may only be activated when the control signal is high. The backlight control circuitry may output an enable signal to the boost converter. The backlight control circuitry may activate the boost converter a predetermined amount of time before each rising clock edge in the control signal by asserting the enable signal for a longer period of time than when the control signal is high. The control signal and the enable signal may be deasserted at around the same times. | 06-12-2014 |
| 20140159615 | LIGHT SOURCES ADAPTED TO SPECTRAL SENSITIVITY OF DIURNAL AVIANS AND HUMANS - A method of illuminating livestock with artificial light sources. The method includes generating a first light having a first light output that provides white light at typical lumen levels for workers. Then by using a dimming device the light source can be dimmed to provide a blue light at under 3 lumen in order to provide artificial light to the diurnal avians representative of moonlight to cause the occurrence of a predetermined characteristic visual spectral response of the diurnal avian substantially enclosed habitat for diurnal avians. | 06-12-2014 |
| 20140159616 | ADAPTIVE HOLDING CURRENT CONTROL FOR LED DIMMER - A TRIAC dimmer controller for an LED lamp dynamically adjusts the amount of additional current supplied to the TRIAC dimmer based on the TRIAC dimmer operating mode. A TRIAC dimmer current controller continually senses the TRIAC dimmer current loading and determines a TRIAC dimmer operating mode based on the detected current. The TRIAC dimmer controller compares the detected current with a threshold current value called a TRIAC holding current, and adjusts the amount of bleeder current based on the difference between the detected current and the threshold current value. By continually sensing the TRIAC dimmer current loading, the LED controller regulates the amount of bleeder current supplied to the TRIAC dimmer using a single sink current path to satisfy the TRIAC dimmer current demands of multiple TRIAC dimmer operating modes. | 06-12-2014 |
| 20140167649 | Double-Output High-Efficiency LED Light-Modulating Circuit - The present invention relates to a double-output high-efficiency LED light-modulating circuit, comprising: a single-stage flyback power factor corrector, a DC/DC convertor, an LED module, and a light-modulating switch. In the present invention, it mainly utilizes the single-stage flyback power factor corrector for carrying out the purposes of reducing the components of an LED luminaire controlling circuit and increasing the circuit power conversion efficiency. Moreover, the double-output high-efficiency LED light-modulating circuit further includes a twin-bus light modulation framework, which can not only reduce the cross voltage of the power switch in back-end DC/DC convertor, but also process a high-frequency light modulation and a low-frequency light modulation to the LED luminaire. Therefore, because the cross voltage of the power switch has been reduced, a power switch with lower R | 06-19-2014 |
| 20140167650 | Terminal Device and Computer-Readable Storage Medium - A terminal apparatus and a computer-readable storage medium capable of achieving reduction of power consumption by appropriately controlling lighting of a display unit are provided. | 06-19-2014 |
| 20140167651 | ELECTRONIC CENSER WITH CONTROL SYSTEM HAVING WIND FORCE SENSOR TO REGULATE LIGHT EMITTING STATE THEREOF - An exemplary electronic censer with control system includes a main body, an LED disposed on the main body and a control system mounted on the main body. The control system includes a driver received in the main body, a wind force sensor exposed out of the main body and a controlling unit electrically connecting the driver. The wind force sensor measures a wind force therearound and samples a wind force signal S corresponding to the measured wind force to the controlling unit. The controlling unit analyzes the wind force signal S and thereby delivers instructions to the driver to regulate a light emitting state of the LED. A method for controlling the electronic censer with control system is also provided. | 06-19-2014 |
| 20140167652 | SYSTEMS AND METHODS FOR CONTROLLING A POWER CONTROLLER - In accordance with systems and methods of the present disclosure, an apparatus may include a power converter and a controller. The controller may be configured to monitor a voltage at an input of the power converter, cause the power controller to transfer energy from the input to a load at a target current, decrease the target current responsive to determining that the voltage is less than or equal to an undervoltage threshold, and increase the target current responsive to determining that the voltage is greater than or equal to a maximum threshold voltage. | 06-19-2014 |
| 20140176014 | LED BACKLIGHT DRIVER CIRCUIT - A light emitting diode (LED) backlight driver circuit includes an LED lightbar and a driver module of the LED lightbar. The driver module includes a backlight driver integrated chip (IC) regulating an output voltage of the driver module, and the backlight driver IC includes a first comparator correcting the output voltage of the driver module. The output end of each LED lightbar is coupled to an inverting input end of the first comparator, and a non-inverting input end of the first comparator is coupled to a protection module. The protection module includes a detection unit detecting an output current of the driver module. When the output current of the driver module detected by the detection unit is greater than a preset first current, the protection module outputs a first reference voltage to the non-inverting input end of the first comparator. When the output current of the driver module detected by the detection unit is lower than the preset first current, the protection module outputs a second reference voltage, which is lower than the first reference voltage, to the non-inverting input end of the first comparator. | 06-26-2014 |
| 20140176015 | LED DRIVING DEVICE AND LIGHTING DEVICE - An LED driving device that performs a dimming operation of an LED module, the device includes: a dimming controller that receives the dimming instruction signal and generates a dimming signal; and a driving circuit that supplies an output current to the LED module based on the dimming signal generated by the dimming controller, wherein the driving circuit unit includes: a converter controller that generates a drive signal based on the dimming signal and outputs the drive signal to a first switching element; a first current setting circuit; and a second current setting circuit that is connected in parallel to the first current setting circuit, and wherein the dimming controller controls an operating state of the second current setting circuit to switch an adjustment range of the output current and a change characteristic of the output current in response to the dimming signal. | 06-26-2014 |
| 20140176016 | SYSTEMS AND METHODS FOR DIMMING OF A LIGHT SOURCE - In embodiments, improved capabilities are described for dimming performance of lighting methods and systems, such as the improvement of dimming LED lamps that are dimmed from standard external dimming devices. Methods and systems for improving dimming performance include a fast startup override facility for overriding a default dimming function of the lamp's electronics through forcing the lamp electronics to operate with a higher than normal duty cycle to ensure the lamp electronics can deliver higher than normal power to an LED module during a dimming current level startup condition. Dimming facilities may also include a dynamic RC selection facility, an active N-level bleeder facility, a dimmer-type detection facility, an improved dimming linearity through symmetrical phase cutting facility, and a flicker reduction facility. | 06-26-2014 |
| 20140176017 | POWER SUPPLY SYSTEM, RIPPLE SUPPRESSION CIRCUIT AND ASSOCIATED METHOD - A power supply system having a voltage source; a load; a filter circuit to filter the voltage provided by the voltage source and to output a filtered voltage; and a follower circuit configured to generate an output signal at an output of the follower circuit based on the filtered voltage, and further wherein the output of the follower circuit is coupled to the load. | 06-26-2014 |
| 20140176018 | CIRCUITRY TO CONTROL A SWITCHING REGULATOR - In one aspect, a circuit includes a switching regulator configured to provide power to a load, a current regulator circuit coupled to the load and a response circuit configured to provide a control signal to the switching regulator in response to electrical changes of the current regulator circuit. The control signal changes non-linearly with respect to the electrical changes at the current regulator circuit. | 06-26-2014 |
| 20140184102 | LIGHT EMITTING DIODE DRIVING DEVICE - An LED driving device includes a DC to DC converter module and a driving module. The DC to DC converter module includes a full-bridge switching circuit for converting a first DC electric power into an AC electric power, a rectifier circuit for converting the AC electric power into a second DC electric power, and a control circuit for modulating pulse phase of the second DC electric power and for controlling switching operation of the full-bridge switching circuit, such that the second DC electric power has a predetermined voltage value. The driving module is operable to receive the second DC electric power, to output a third DC electric power with a predetermined current value for driving an LED module, and to modulate pulse width of the third DC electric power. | 07-03-2014 |
| 20140184103 | FEEDBACK CONTROL CIRCUIT AND POWER SUPPLY APPARATUS USING DIMMING ADJUSTMENT AND FORWARD VOLTAGE CONTROL - There are provided a feedback control circuit and power supply apparatus using dimming adjustment and forward voltage control. The feedback control circuit includes: a voltage detection unit detecting an output voltage from a transformer and providing a detection voltage; a dimming unit generating a varied dimming signal; and a feedback circuit unit comparing the detection voltage with a reference voltage varied according to the dimming signal and providing a feedback voltage for controlling a power transmission ratio of the transformer. | 07-03-2014 |
| 20140184104 | DIMMING SYSTEM AND DIMMING CONVERTER AND LOAD DIMMING METHOD THEREOF - A dimming system and a dimming converter and load dimming method thereof are provided. In the dimming converter, a cutting phase determination unit is connected with an input terminal and configured to determine phase angle information of a power supply signal of an output of a load terminal in a dimmer; an output unit is configured to output a dimming signal corresponding to the phase angle information determined by the cutting phase determination unit from a dimming output terminal to a load of the dimming system according to a correspondence relationship between the phase angle information and the dimming signal stored in a storage unit and to output a phase-cut power source signal from a supply output terminal to the load. The dimming system can be compatible with a large number of loads with different dimming requirements to thereby improve the dimming efficiency of the loads. | 07-03-2014 |
| 20140191684 | SYSTEMS AND METHODS FOR A HYSTERESIS BASED DRIVER USING A LED AS A VOLTAGE REFERENCE - The present disclosure is directed to a hysteresis based driver that incorporates the forward voltage of the LEDs being driven into the design of the driver itself. Instead of providing a typical fixed voltage reference, the forward voltage of one or more LEDS driven by the driver is used as a voltage reference. As the input voltage varies during operation of the one or more LEDs, the current varies as well. This current change is larger than it would be without the LEDs and only resistors. This variable current measurement may be used as input into a hysteresis circuit that controls the switch that turns on and off the one or more LEDs. As such, the driver may not incorporate or use a typical fixed voltage reference such as one provided by a zener diode. | 07-10-2014 |
| 20140191685 | DISCHARGE LAMP LIGHTING DEVICE, DISCHARGE LAMP LIGHTING METHOD, AND PROJECTOR - A discharge lamp lighting method for controlling lighting of a discharge lamp includes varying an amount of generation (current value) of overshoot and undershoot generated in a waveform of a drive current that is applied when driving the discharge lamp, according to a magnitude of drive power supplied to the discharge lamp and a drive mode. | 07-10-2014 |
| 20140191686 | Adaptable Biologically-Adjusted Indirect Lighting Device and Associated Methods - An LED lamp includes a frame, a power circuit, a driver circuit coupled with the power circuit, an optical member comprising a reflective surface and a lower surface, the reflective surface defining an optical cavity, a light source support member defining a first aperture, and a light source comprising a plurality of LED dies coupled to and driven by the driver circuit. The light source support member is positioned proximate to the lower surface and generally conforms to a shape of the lower surface forming a gap therebetween defined as a second aperture. Additionally, the light source support member is configured to carry the light source in an orientation such that light emitted by the plurality of LEDs is incident upon the reflective surface. Furthermore, the reflective surface is configured to reflect light incident thereupon in the direction of at least one of the first aperture and the second aperture. | 07-10-2014 |
| 20140197760 | POWER CONTROL UNIT AND METHOD FOR CONTROLLING ELECTRICAL POWER PROVIDED TO A LOAD, IN PARTICULAR AN LED UNIT, AND VOLTAGE CONTROL UNIT FOR CONTROLLING AN OUTPUT VOLTAGE OF A CONVERTER UNIT - The present invention relates to a power control unit ( | 07-17-2014 |
| 20140203732 | LED DRIVER APPARATUS - A LED driving apparatus includes: an output transistor, having a drain coupled to the LED; a node, coupled to a source of the output transistor; a ground transistor, having a drain coupled to the node, and a source coupled to the ground; an operational amplifier, including: a first input end and a second input end, for respectively receiving a driving signal and a feedback signal; and an output end, for outputting an output signal to a gate of the output transistor; a compensating capacitor, including a first end and a second end; and a switching unit, for switching between a first connection mode and a second connection mode, so as to offset a bias difference to the node for compensating the bias difference of the operational amplifier. | 07-24-2014 |
| 20140203733 | DIMMING CONTROL SYSTEM FOR SOLID STATE ILLUMINATION SOURCE - A system for dimming a solid state illumination source, such as a light emitting diode, including a low pass analog filter operative to extract a direct current (DC) voltage component from an incoming alternating current (AC) waveform. A microprocessor is structured to digitally filter the DC voltage resulting from the analog filter and extract dimming data associated with a dimming operation of the LED. The microprocessor includes monitoring capabilities operative to detect predetermined characteristics of the dimming data associated with the dimming operation. The predetermined characteristics are determinative of manual control of the dimming operation or non-manual activation of a dimming signal. The predetermined characteristics which are determinative of manual control may include, but not be limited to, speed of voltage change, direction of voltage change and amount of voltage change associated with the dimming signal delivered to the LED. | 07-24-2014 |
| 20140203734 | APPARATUS AND METHOD FOR COUPLING POWER SOURCE TO LAMP - An apparatus coupling a power source to a light emitting diode lamp includes a first part for receiving first voltage and current signals from the power source and a second part for supplying second voltage and current signals to the lamp. The first part includes a detection part for detecting a first amplitude reduction in at least one of the first signals, for example in the first voltage signal, and the second part includes an introduction part for, in response to a detection result, introducing a second amplitude reduction into at least one of the second signals, for example into the second current signal. As a result, the first part detects a first dimming state caused by the power source, and the second part introduces a second dimming state in response to the first part having detected the first dimming state, and the apparatus has self-dimming capabilities, to keep the grid stable | 07-24-2014 |
| 20140210376 | LIGHT BULB SYSTEM FOR PROVIDING A WALL OR LAMP FIXTURE SWITCH WITH DIMMER CAPABILITY - The invention relates to a dimming light bulb for retrofitting a ceiling or lamp fixture wherever a dimming function can be accessed from the regular light switch. | 07-31-2014 |
| 20140210377 | Converter One Pin Sensing - Power converters, such as switched-mode power converters comprise a reduced number of sensing pins. A power converter is configured to convert electrical energy at an input voltage into electrical energy at an output voltage. The power converter comprises a power switch configured to be switched between on- and off-states; and a controller configured to generate a control signal for putting the power switch into the on-state and off-state, respectively; wherein the control signal is generated based on a first and second measurement signal from the power converter external to the controller. The controller comprises a sensing pin configured to sense the first measurement signal, when the power switch is in on-state, and configured to sense the second measurement signal, when the power switch is in off-state. | 07-31-2014 |
| 20140217925 | INPUT VOLTAGE TRANSFER APPARATUS FOR LIGHT EMITTING DIODE LIGHTING SYSTEM - An input voltage transfer apparatus for an LED lighting system is provided. The input voltage transfer apparatus includes a source voltage storage unit, a zero voltage switching unit, and a nonzero voltage switching unit. The source voltage storage unit stores a source voltage. The zero voltage switching unit turns on according to the source voltage stored in the source voltage storage unit when a zero voltage is inputted. The nonzero voltage switching unit turns on according to a current applied thereto through the zero voltage switching unit when a nonzero voltage is inputted. When the nonzero voltage switching unit is turned on, the source voltage storage unit discharges the stored source voltage. | 08-07-2014 |
| 20140232298 | A LIGHT CONTROL SYSTEM FOR USE WITHIN A HOSPITAL ENVIRONMENT - The invention relates to a control sys tem ( | 08-21-2014 |
| 20140239848 | DYNAMIC LIGHT EMITTING DEVICE (LED) LIGHTING CONTROL SYSTEMS AND RELATED METHODS - Dynamic light emitting device (LED) lighting adjustment systems and related methods are disclosed. In one aspect, a method can receive, at an LED lighting fixture, a lighting adjustment signal corresponding to a target lighting level and determine a delta value that represents a difference between a current lighting level of the LED lighting fixture and the target lighting level and a step time value associated with the determined delta value. The method can further include adjusting the current lighting level of the LED lighting fixture to a new current lighting level for the duration of the step time value and repeating the determining and adjusting steps until the new current lighting level equals the target lighting level. | 08-28-2014 |
| 20140239849 | BLEEDER CIRCUIT HAVING CURRENT SENSE WITH EDGE DETECTION - A bleeder circuit for use in a power converter of a lighting system includes a current sense circuit coupled between first and second terminals of an input of a driver circuit to be coupled to drive a load. The current sense circuit is coupled to output a current sense signal in response to an input current through an input of the power converter coupled to the input of the driver circuit. An edge detection circuit is coupled between the first and second terminals to output an edge detection signal in response to an input signal between the first and second terminals. A variable current circuit is coupled between the first and second terminals to conduct a bleeder current between the first and second terminals in response to current sense signal and further in response to the edge detection signal. | 08-28-2014 |
| 20140239850 | BACKLIGHT DIMMING CIRCUIT, DIMMING METHOD OF THE SAME AND LIQUID CRYSTAL DISPLAY THEREOF - The present invention provides a backlight dimming circuit, a dimming method of the same and a liquid crystal display thereof. The backlight dimming circuit comprises a power supply voltage terminal VCC, which is used to provide supply voltage; an operational amplifier Q, the noninverting input terminal of which connected with the power supply voltage terminal VCC, and the inverting input terminal of which connected with a load terminal; a precision resistor R, which is connected between the noninverting input terminal and the inverting input terminal of the operational amplifier Q, the voltage differential signal across the precision resistor R being converted and amplified to a DC voltage signal by the operational amplifier Q and outputting; and a comparator C, the noninverting input terminal of which receiving the DC voltage signal output from the operational amplifier Q, and the inverting input terminal of which receiving a sawtooth signal from a boost IC in a boost converter, which is used to compare the DC voltage signal with the sawtooth signal of the boost IC and then outputting a pulse width modulation dimming signal according the comparison results. The structure of the present invention is simple, and the costs are low. The backlight brightness is associated with the screen in real-time, which reduces the backlight power consumption and promotes the energy conservation of the products. | 08-28-2014 |
| 20140239851 | AUTOMOBILE LED DRIVING DEVICE - An automobile LED driving device includes a current setting portion to set multiple reference currents independently from one another for multiple respective current setting resistors connected externally, a current controller to select one of the multiple reference currents based on a control signal provided from outside, and an output transistor to control an output current to an automobile LED connected externally based on the reference current selected by the current controller. | 08-28-2014 |
| 20140246992 | PRIMARY SIDE CONTROL FOR SWITCH MODE POWER SUPPLIES - Techniques are disclosed for providing a stable output voltage in switching mode power supplies (SMPS). An SMPS includes a switching converter for powering a load, a passive startup circuit for initially providing an internal voltage supply for powering switching electronics when the mains is turned on, and a feedback circuit providing the internal voltage supply once the switching converter starts switching. The SMPS also includes a decoupling circuit that decouples or otherwise isolates the gain of the passive startup circuit from the feedback circuit, so as to prevent false dynamic overvoltage protection triggers. The decoupling circuit is implemented, for instance, with the addition of two or three passive components, such as a diode and a capacitor, or a diode, a capacitor, and a resistor. Preventing false triggering of the dynamic overvoltage protection in turn provides a more stable output voltage from the SMPS. | 09-04-2014 |
| 20140252988 | PIXEL CIRCUITS FOR AMOLED DISPLAYS - The OLED voltage of a selected pixel is extracted from the pixel produced when the pixel is programmed so that the pixel current is a function of the OLED voltage. One method for extracting the OLED voltage is to first program the pixel in a way that the current is not a function of OLED voltage, and then in a way that the current is a function of OLED voltage. During the latter stage, the programming voltage is changed so that the pixel current is the same as the pixel current when the pixel was programmed in a way that the current was not a function of OLED voltage. The difference in the two programming voltages is then used to extract the OLED voltage. | 09-11-2014 |
| 20140252989 | Active Avalanche Protection for Fly Back Converter - The present document relates to power converters. In particular, the present document relates to the protection of the power switches of power converters. A controller configured to control a switched-mode power converter is described. The controller comprises a control pin for controlling a state of a power switch of the switched-mode power converter using a control signal; and a sensing pin for receiving a sensed current signal indicative of a current through the power switch. The controller is configured to detect a break-through situation of the power switch based on the state of the power switch and based on the sensed current signal. | 09-11-2014 |
| 20140252990 | Quantization Error Reduction in Constant Output Current Control Drivers - An electronic system and method includes a controller to control a switching power converter in at least two different modes of operation, a normal mode and an error reduction mode. The controller controls an amount of charge pushed (i.e. delivered) by the switching power converter to a load to reduce a charge quantization error. The charge quantization error represents an amount of charge pushed to the load beyond a target charge amount. The controller determines an amount of charge to be pushed to the toad. Based on the amount of charge to be pushed to the load, the controller generates a current control signal that controls a current control switch in the switching power converter. Determination of the control signal depends on whether the controller is operating in normal mode or error reduction mode. The controller attempts to reduce the charge quantization error to avoid power fluctuations. | 09-11-2014 |
| 20140252991 | ELECTRONIC BALLASTS - Methods and apparatus are described that can provide improved power factor correction and total harmonic distortion, efficiency and/or direct feedback of load current variations to a power source inverter. In one example, a power supply, for example, a ballast, can have an input circuit, an output circuit and an inverter circuit coupled between the input circuit and the output circuit. A current feedback circuit is coupled between the output circuit and the inverter circuit and configured to feed current back to the inverter circuit through a transformer stage separate from the inverter as a function of a current level in the output circuit. | 09-11-2014 |
| 20140252992 | System and Method for Controlling Dimming of Solid State Lighting Device - Determining an amount of light output from a solid state lighting (SSL) unit based on a dimmer setting includes determining the dimmer setting of the dimmer during a readout mode by analyzing a power signal received from the dimmer, the dimmer setting indicating a desired level of light, determining power needed at input terminals of the SSL unit for an SSL load to output the desired level of output light, and determining a value of an adjusting signal for adjusting the power at the input terminals of the SSL unit during a power reception mode, based at least in part on the determined dimmer setting, causing the SSL unit to output the desired level of light. | 09-11-2014 |
| 20140265929 | CONTROLLING SWITCHING CURRENT REGULATORS - A switching current regulator controls a load current flowing through a load. The switching current regulator switches a switch to an ON state after applying a regulating signal to the switch. During an integration period while the switch is in the ON state, the switching current regulator integrates an output voltage based on a sense voltage based on the load current and a reference voltage; at the end of the integration period, the switching current regulator outputs an integrated output voltage. The switching current regulator compares the integrated output voltage to a predetermined value. Based on a result of comparing the integrated output voltage and the predetermined value, the switching current regulator adjusts the regulating signal. | 09-18-2014 |
| 20140265930 | REPLACEABLE LIGHTING FIXTURE COMPONENTS - A lighting fixture includes a driver module and a separate light engine module, which has a solid-state light source and light engine memory. The driver module is electrically coupled to the light engine module and configured to drive the solid-state light source based on drive data. The drive data defines how the driver module should drive the solid-state light source to generate light with at least one defined lighting characteristic. The drive data may define or be used to identify the signal characteristics, such as drive currents, voltages, waveforms, and the like that must be provided by the driver module to drive the solid-state light source. The drive data is stored in the light engine memory of the light engine module, and the driver module is configured to retrieve the drive data from the light engine memory and drive the solid-state light source based on the drive data. | 09-18-2014 |
| 20140265931 | Electrical Power Supply With Removable Plug-In Cartridge - A power supply for supplying electrical power at a predetermined level is provided. The power supply includes circuitry configured to receive an electrical input and produce an electrical output. The power supply further includes a housing with an opening configured to receive a removable plug-in cartridge. The removable plug-in cartridge is configured to limit the electrical power output to the predetermined level. | 09-18-2014 |
| 20140265932 | Electrical Power Supply with Removable Plug-In Cartridge - A method of supplying electrical power to a load is provided. The method includes the step of providing a removable plug-in cartridge having markings related to a desired value of an electrical output of a power supply unit. The method further includes configuring the power supply unit to receive the removable plug-in cartridge such that the removable plug-in cartridge operates to set an output value of the power supply to the desired value. | 09-18-2014 |
| 20140265933 | SYSTEM AND METHOD FOR LEARNING DIMMER CHARACTERISTICS - Systems and methods for learning dimmer characteristics provide improved efficiency in operating lighting devices. In one embodiment, an apparatus includes a lamp controller that is configured to monitor voltage information associated with one or more lamps or a dimmer of a system, adjust one or more parameters of an attach current profile in conformity with the voltage information to arrive at a selected attach current profile, and apply within the system the selected attach current profile. | 09-18-2014 |
| 20140265934 | VEHICLE INTERIOR LIGHTING - A lighting system and method for a vehicle interior wherein the light system includes an electronic control unit (ECU) and a lighting layer having a plurality of light elements and a proximity sensing system. The lighting layer is coupled to the ECU and each of at least some of the light elements may be independently turned ON or OFF in response to a first proximity pattern provided by human interaction and received by the proximity sensing system. The lighting arrangement permits an occupant of the vehicle to selectively define the area and/or shape of local illumination and to control one or more characteristics of the illumination such as color or brightness. | 09-18-2014 |
| 20140265935 | Digital Dimmable Driver - A digital dimmable driver system includes an alternating current input, a dimmer operable to perform a phase cut operation on a waveform from the alternating current input, a driver circuit operable to switch from a dimming mode to a universal voltage input mode based on a phase angle of the dimmer, and a power output operable to power a light. | 09-18-2014 |
| 20140285114 | LED LIGHTING DEVICE, SYSTEM, AND METHOD WITH AIR QUALITY DETECTION - LED lighting devices/systems having air quality detection functions and methods for detecting air quality using the LED lighting devices/systems are provided. Exemplary LED lighting device includes an air quality detection unit configured to detect air quality parameter; a controller unit connected to the air quality detection unit to process data corresponding to the air quality parameter; an LED light source assembly controlled by the controller unit and configured to provide lighting; and an LED driver and power supply unit connected to drive the LED light source assembly, and to supply power to the entire LED lighting device. Exemplary LED lighting system includes at least two nodes each including an LED lighting device. By combining an air quality detection unit with an LED lighting device that are widely distributed and installed, the disclosed LED lighting devices/systems thus provide real-time and convenient air quality monitoring. | 09-25-2014 |
| 20140285115 | MULTI-CHANNEL DRIVER AND ILLUMINATING DEVICE - A multi-channel driver for driving an illuminating unit includes: a plurality of output channels for coupling with the illuminating unit; a power supply unit for supplying a driving current; a current distributing unit, which includes at least one current distributing circuit, wherein the at least one current distributing circuit includes two output channels respectively, and distributes the driving current provided by the power supply unit to the two output channels; a current detecting unit for detecting the output current output by the output channels, wherein the unit is configured with at least one current detecting circuit for the two output channels, and a control unit, wherein the control unit regulates the driving current according to the output current detected by the at least one current detecting circuit of the current detecting unit, to maintain constant output current in the output channels. | 09-25-2014 |
| 20140292227 | LED BACKLIGHT DRIVING CIRCUIT AND LCD DEVICE - A light emitting diode (LED) backlight driving circuit of the present disclosure includes a constant current driver chip, a power module, an LED lightbar coupled to the power module, a dimming module coupled to the LED lightbar, and a low-pass filter. The constant current driver chip comprises a multiplier, and the constant current driver chip generates a gate signal and a dimming signal that are sent to an input end of the multiplier. An output end of the multiplier is coupled to the power module, and is coupled to the dimming module through the low-pass filter. | 10-02-2014 |
| 20140292228 | DRIVING APPARATUS FOR LED CHIPS OF DIFFERENT SPECIFICATIONS - A driving apparatus for LED chips includes: a driving unit, a voltage measuring unit, and a feedback control module. The driving unit provides a driving voltage and a driving current to a LED chip; the voltage measuring unit measures the driving voltage; the feedback control module is built-in with a default power; According to the driving voltage measured by the voltage measuring unit and the default power, the feedback control module controls the driving unit to maintain the driving current at a working current, wherein the working current matches the rated current of the LED chip. Whereby, the driving apparatus could drive LED chips of different specifications. | 10-02-2014 |
| 20140306621 | POWER SUPPLY DEVICE AND LIGHTING DEVICE - A power supply device is provided with the following: a rectifier circuit that rectifies an alternating voltage from an alternating current source; a booster circuit that boosts the voltage after rectification, and generates an input side voltage of a voltage conversion unit; the voltage conversion unit that outputs a voltage required for reducing the input side voltage and supplying the input side voltage to a light source; a voltage current detection unit that determines whether or not the light source is connected; and an output voltage control unit that, if it is determined that a first resistor and a second resistor, which are connected in parallel with respect to the light source, and the light source are not connected, controls the voltage of the first resistor so that the voltage is no more than a prescribed value. | 10-16-2014 |
| 20140312806 | LIGHT EMITTING DIODE LIGHTING SYSTEM - An LED lighting system is provided. The LED lighting system includes a main transformer, a voltage detector, a current controller, a second reference voltage supplier, and a power factor compensation circuit. The main transformer transforms an input signal to supply the transformed input signal to an LED group. The voltage detector supplies a control voltage proportional to a level of an input voltage corresponding to the input signal. The current controller includes a first voltage storage, a negative voltage applier, a second voltage storage, switch, and a current control signal generator. The first voltage storage stores the control voltage supplied from the voltage detector or discharges a stored voltage. The negative voltage applier is connected to the first voltage storage, and connected to a ground to apply the control voltage to the ground when the control voltage is a negative voltage. The second voltage storage is connected to the first voltage storage, and stores the control voltage applied through the first voltage storage or discharges a stored voltage. The switch is connected to the second voltage storage, and activated by a driving signal to apply a ground voltage to the second voltage storage. The current control signal generator generates a current control signal according to a voltage signal and gain of the second voltage storage. The first voltage storage or the second voltage storage supplies the current control signal through the voltage detector. The second reference voltage supplier supplies the second reference voltage when the control signal supplied from the voltage detector is equal to or greater than the second reference voltage. The power factor compensation circuit controls a duty ratio of the driving signal according to a level of the current control signal, and controls a peak value of a primary current in the main transformer according to a level of the second reference voltage. | 10-23-2014 |
| 20140312807 | METHOD OF TRANSMITTING SIGNALS - A method of transmitting signals applied for a loading control system, which includes a phase angle control module and a driving module, wherein the phase angle control module is electrically connected to an input interface. The method includes the following steps: A. switch the input interface from a first status to a second status; B. modify a voltage waveform of an AC power to make the voltage waveform have a delayed conduction angle in half of its wave period; C. check the delayed conduction angle of the voltage waveform; D. transmitting an electric signal to a loading according to the delayed conduction angle. | 10-23-2014 |
| 20140320043 | CIRCUIT ARRANGEMENT FOR SELECTIVE POWERING OF DISTRIBUTED LOADS - A circuit arrangement for selective powering of distributed loads (D | 10-30-2014 |
| 20140333229 | DRIVER SYSTEM FOR DRIVING AT LEAST ONE LED - A driver system for driving at least one LED, the driver system includes an LED driver including a current source connected to the at least one LED for providing an LED drive current to the at least one LED, and a control module for controlling a flow of the LED drive current through the at least one LED. The driver system further includes a power supply having a power output terminal connected to a power input terminal of the current source for providing an electrical power to the current source. The control module includes a control signal output connected to a control signal input of the power supply for controlling an operation of the power supply. | 11-13-2014 |
| 20140340000 | BACKLIGHT DRIVING CIRCUIT, LCD DEVICE, AND METHOD FOR DRIVING THE BACKLIGHT DRIVING CIRCUIT - A backlight driving circuit includes a constant current driving chip, a power module, and a light emitting diode (LED) lightbar coupled with the power module. The constant current driving chip includes a control module that controls switching frequency of the power module, and an adjusting module that adjusts duty cycle of effective current flowing through the LED lightbar. The control module includes a frequency pin used to set the switching frequency of the power module. An external pulse-width modulation (PWM) dimming signal is sent to the adjusting module of the constant current driving chip. The backlight driving circuit further includes a detection module that detects duty cycle of the PWM dimming signal, and a monitor module coupled with the detection module of the backlight driving circuit. | 11-20-2014 |
| 20140346972 | SOLID STATE LIGHT SYSTEM WITH BROADBAND OPTICAL COMMUNICATION CAPABILITY - Systems and methods are disclosed for use in conjunction with a standardized electrical connector of a conventional light bulb or tube with one or more light emitting diodes (LEDs) electrically coupled to at least one electrical connector compatible with a conventional light connector, wherein the LEDs include at least one multiband-type ultra-wideband (UWB) transceiver having one or more optical channels defined using one or more OFDM bands; and a controller coupled to the LEDs, the controller adjusting LED light output and communicating with the optical network using the optical transmitter and receiver. In other embodiments, the LEDs include at least one optical transmitter and receiver optically coupled to an optical network using at least one LED with a first mode to generate light and a second mode to receive optical transmissions using ambient light. | 11-27-2014 |
| 20140346973 | SYSTEMS AND METHODS FOR DIMMING CONTROL USING TRIAC DIMMERS - System and method for dimming control of one or more light emitting diodes. An example system includes one or more signal processing components configured to receive a first signal associated with a TRIAC dimmer, process information associated with the first signal, determine whether the TRIAC dimmer is in a first condition or a second condition, generate a second signal based on at least information associated with the first signal, and send the second signal to a switch. The one or more signal processing components are further configured to, if the TRIAC dimmer is determined to be in the first condition, generate the second signal to cause the switch to be opened and closed corresponding to a modulation frequency. | 11-27-2014 |
| 20140346974 | SMART FET CIRCUIT - A lighting module has at least one array of solid-state lighting elements, a variable resistor having an input of an intensity control voltage for the array of solid-state lighting elements, the variable resistor having an output electrically connected to an input of the array of solid-state lighting elements, and a voltage regulator electrically connected to the output of the variable resistor, the voltage regulator having an output connected to an input of the array of solid-state lighting elements. | 11-27-2014 |
| 20140354180 | BACKLIGHT DRIVING CIRCUIT, LCD DEVICE, AND METHOD FOR DRIVING THE BACKLIGHT DRIVING CIRCUIT - A backlight driving circuit includes a light emitting diode (LED) lightbar, a power supply driving the LED lightbar, a constant current driving chip controlling the power supply and the LED lightbar, and a control unit monitoring a voltage of a cathode of the LED lightbar. The constant current driving chip includes a main control unit that drives the power supply, and an adjusting unit that adjusts brightness of the LED lightbar. An input end of the adjusting unit is coupled to the cathode of the LED lightbar, and an output end of the adjusting unit is coupled to a load unit, a resistance value of the load unit may be adjusted. When the voltage of the cathode of the LED lightbar is greater than or equal to a preset threshold, the control unit controls the load unit to reduce the resistance value of the load unit. | 12-04-2014 |
| 20140354181 | LED BACKLIGHT DRIVING CIRCUIT, LCD DEVICE, AND METHOD FOR DRIVING THE LED BACKLIGHT DRIVING CIRCUIT - A light emitting diode (LED) backlight driving circuit includes an LED light bar, a power supply that drives the LED light bar, and a control assembly that controls the LED light bar and the power supply. The control assembly is configured with a monitor that reduces brightness of the LED light bar when a display image of a liquid crystal (LC) panel is switched between a two-dimensional (2D) display mode of the LC panel and a three-dimensional (3D) display mode of the LC panel, and the brightness of the LED light bar goes normal after a preset delay time. | 12-04-2014 |
| 20140354182 | PIXEL AND PIXEL CIRCUIT THEREOF - A pixel includes an organic light-emitting diode, a driving transistor, a first switch, a third switch and a fourth switch. The driving transistor is electrically coupled to the organic light-emitting diode. When the pixel is in a data writing period, the first switch is configured to write a data voltage into a control terminal of the driving transistor. When the pixel is in a compensating period, a path between a control terminal and a first terminal of the fourth switch is established to charge or discharge the control terminal of the driving transistor through a current path, thereby forming a compensating voltage according to the voltage of the control terminal of the driving transistor. The driving transistor is turned on by the compensating voltage during a light emitting period, and the third switch is turned on such that a driving current is provided to the organic light emitting diode. | 12-04-2014 |
| 20140354183 | METHOD FOR ADJUSTING A COLOR POINT OF LIGHT EMITTED FROM AN ORGANIC LIGHT EMITTING DIODE OLED - The present invention relates to a method for adjusting a color point ( | 12-04-2014 |
| 20140354184 | LIGHT CONTROL SYSTEM - The light control system includes command means ( | 12-04-2014 |
| 20150022118 | PROGRAMMABLE LIGHT EMITTING DIODE (LED) DRIVER TECHNIQUE BASED UPON AN INPUT VOLTAGE SIGNAL - Provided is an LED driver including an amplifier configured to receive a negative voltage input signal and produce a positive voltage output signal in response thereto. Also included is a microcontroller configured for sensing a value of the positive voltage output signal. The microcontroller (i) enters a programming mode when the value exceeds a threshold and (ii) produces an output current responsive to the value. | 01-22-2015 |
| 20150022119 | PROGRAMMABLE LIGHT EMITTING DIODE (LED) DRIVER TECHNIQUE BASED UPON A PREFIX SIGNAL - Provided is a light emitting diode (LED) driver. The LED driver includes a microcontroller for setting a level of an output current of the driver. The driver is configured to receive a prefix as an input, the prefix instructing the microcontroller to enter a programming mode. The microcontroller is responsive to a level signal representative of the level of the output current during the programming mode. | 01-22-2015 |
| 20150022120 | LIGHT EMITTING DIODE APPARATUS WITH OVER CURRENT PROTECTION FUNCTION AND SYSTEM HAVING THE SAME - A switchable constant current constant voltage supply unit outputs a constant current to drive a plurality of light emitting diode apparatuses when voltages of the light emitting diode apparatuses are not greater than a threshold voltage detected by a voltage detection unit. The switchable constant current constant voltage supply unit outputs a constant voltage to drive the light emitting diode apparatuses when the voltages of the light emitting diode apparatuses detected by the voltage detection unit are greater than the threshold voltage. Moreover, the light emitting diode apparatus includes a positive temperature coefficient thermistor or a polymeric positive temperature coefficient thermistor. | 01-22-2015 |
| 20150028775 | Line Voltage Switch Event Detection for LED Assemblies - A controller for controlling the illumination state of a light source of solid state lighting devices such as LED or OLED assemblies, is presented. The controller controls the light source according to a plurality of illumination states subject to determine an event of a plurality of events. The controller controls a power converter that converts power derived from an input voltage waveform of line voltage power supply into a drive signal for the light source. The controller determines an event of a plurality of events encoded within the input voltage waveform of the line voltage power supply. A first state processor determines a next illumination state of the plurality of illumination states, based on the determined event and based on the current illumination state. Line voltage Switch event detection is performed while no power is available at the line voltage terminals. | 01-29-2015 |
| 20150028776 | LIGHTING CONTROL SYSTEMS AND METHODS - A circuit includes a dimming controller, an adjustable resistor connected downstream of and in series connection with the dimming controller, a driver connected downstream and in series with the adjustable resistor, and a light connected downstream and in series with the driver. Related methods are also provided. A light emitting diode (LED) light fixture has a wide adjustment range of wattage and lumen outputs. A variable output LED light fixture has adjustable lumen output. An adjustable LED light fixture is adaptable to multiple lighting environments and needs, including outdoor and indoor applications. A LED light fixture includes a LED driver with a device adjusting the maximum wattage and lumen output of LED array(s). The adjustment is not permanent and can be adjusted multiple times to tune the wattage and lumen output or as required due to changes at the installation environment. | 01-29-2015 |
| 20150028777 | SINGLE WIRE SERIAL INTERFACE UTILIZING COUNT OF ENCODED CLOCK PULSES WITH RESET - A single wire serial interface for power ICs and other devices is provided. To use the interface, a device is configured to include an EN/SET input pin. A counter within the device counts clock pulses sent to the EN/SET input pin. The output of the counter is passed to a ROM or other decoder circuit. The ROM selects an operational state for the device that corresponds to the value of the counter. In this way, control states may be selected for the device by sending corresponding clock pulses to the EN/SET pin. Holding the EN/SET pin high causes the device to maintain its operational state. Holding the EN/SET pin low for a predetermined timeout period resets the counter and causes the device to adopt a predetermined configuration (such as off) until new clock pulses are received at the EN/SET pin. | 01-29-2015 |
| 20150035454 | Lighting Control Method and Device - The present disclosure relates to a method and apparatus for controlling an illumination device, such as a light bulb, LED light, or the like. In one embodiment, a lighting control adapter is described, comprising a male base for physically attaching the lighting control adapter to a light fixture and for receiving power from the light fixture via a light switch connected to the light fixture, a female socket for receiving a base of an illumination device, a switching circuit for providing switchable power to the illumination device, and a processing circuit coupled to the switching circuit, for detecting one or more power toggles of the power received by the male base, and for controlling illumination of the illumination device based on the detection of one or more detected toggles. | 02-05-2015 |
| 20150035455 | SINGLE WIRE SERIAL INTERFACE - A single wire serial interface for power ICs and other devices is provided. To use the interface, a device is configured to include an EN/SET input pin. A counter within the device counts clock pulses sent to the EN/SET input pin. The output of the counter is passed to a ROM or other decoder circuit. The ROM selects an operational state for the device that corresponds to the value of the counter. In this way, control states may be selected for the device by sending corresponding clock pulses to the EN/SET pin. Holding the EN/SET pin high causes the device to maintain its operational state. Holding the EN/SET pin low for a predetermined timeout period resets the counter and causes the device to adopt a predetermined configuration (such as off) until new clock pulses are received at the EN/SET pin. | 02-05-2015 |
| 20150042243 | POWER-OVER-ETHERNET (PoE) CONTROL SYSTEM - One example includes a power-over-Ethernet (PoE) control system. The system includes a powered device (PD) that is configured to receive a voltage signal via an Ethernet connection and which comprises a PoE signal receiver configured to indicate a nominal power level via the received voltage signal. The system also includes a power sourcing equipment (PSE) device configured to generate the voltage signal and to measure a class current of the voltage signal to determine the nominal power level. The PSE device includes a PoE controller configured to provide a power setting command as a function of the nominal power level to the PoE signal receiver via the voltage signal, such that the PD can operate at a power level that is based on the power setting command. | 02-12-2015 |
| 20150048761 | DIMMING RANGE EXTENSION - Representative implementations of devices and techniques provide a dimming arrangement for a variable load, such as a lamp. The dimming arrangement is coupled to a drive circuit for the load and arranged to reduce a drive current associated with the drive circuit, based on a control voltage. | 02-19-2015 |
| 20150048762 | MULTI-STANDARD LIGHTING CONTROL INTERFACE CIRCUIT - Lighting control interface techniques and corresponding circuitry are provided. The techniques include receiving a first signal potentially representative of a first lighting control signal, and receiving a second signal potentially representative of a second lighting control signal, and determining if either of the first and second signals complies with a first or second lighting control protocol. The lighting control signal may be applied to the same interface connector (regardless of the protocol), thereby eliminating the need for separate dedicated interface connectors. In some cases, the techniques further include determining that a dummy control signal is manifesting in the first and/or second signals, thereby indicating that no lighting control signal is being applied. Depending on the resulting determination, the techniques may include, for example, setting output lighting power according to a pre-established value, or according to the first or second lighting control protocol. | 02-19-2015 |
| 20150061543 | METHODS FOR DRIVING AN LED LIGHTING DEVICE AND CIRCUITS THEREOF - A method for driving an LED lighting device includes receiving an input voltage from a battery unit and converting the input voltage into a driving current to drive the LED lighting device. The method further includes detecting whether the battery unit is in a low battery state. When the low battery state of the battery unit is detected, the driving current is reduced. | 03-05-2015 |
| 20150061544 | DRIVING DEVICE, LIGHT-EMITTING DEVICE, PROJECTION DEVICE, CONTROL METHOD, AND STORAGE MEDIUM - A driving device includes: a power source circuit that converts inputted power to a constant voltage or constant current power, and outputs this converted power; a driver circuit that supplies the power outputted by the power source circuit to a load; and a control unit that receives the voltage or current of the power outputted by the power source circuit, calculates a value by multiplying a control gain by a difference of the detected value and a constant target value, and outputs a feedback signal based on this calculated value to the power source circuit, thereby performing feedback control on the power source circuit, the control unit raising the control gain when the voltage or current of the power outputted by the driver circuit is changed. | 03-05-2015 |
| 20150061545 | METHOD AND APPARATUS FOR CONTROLLING LIGHTING - A lighting control method and an electronic device using the same are provided. The method includes receiving pattern information for controlling lighting, generating lighting control information including brightness level information corresponding to operation time information based on the received pattern information, and transmitting the lighting control information. | 03-05-2015 |
| 20150077020 | METHOD OF DRIVING LED CHIPS OF SAME POWER BUT DIFFERENT RATED VOLTAGES AND CURRENTS - A method of driving LED chips of same power but different rated voltages and currents includes the following steps: set a predetermined power; provide a LED chip which has a rated power accordant to the predetermined power; measure the LED chip to obtain a working current thereof while the LED chip is operated; provides a driving current to the LED chip, and maintain the driving current the same as the working current. | 03-19-2015 |
| 20150102749 | SYSTEM AND METHODS FOR OPERATING A LIGHTING DEVICE - A lighting device may include a light source, a control circuit, and a communication device positioned in communication with the control circuit. The communication device may be configured to receive a transmission from a user device, and the transmission may include a data structure. The data structure may include a show packet and an event packet. The show packet may include an ID string and information regarding a number of event packets associated with the data structure, and the event packet may include information regarding a lighting spectrum, a fade type, a fade duration, and a hold duration. The control circuit may be configured to operate the light source to emit light transitioning from a present light emission having a present spectral power distribution to a light emission having spectral power distribution indicated by the lighting spectrum according to the fade type and fade duration. | 04-16-2015 |
| 20150115840 | LIGHT EMITTING DIODE DRIVER - There is provided a light emitting diode driver capable of improving power efficiency by using a resistor having a low power consumption rating while controlling an LED channel so that it has constant brightness stably. The light emitting diode driver includes: a power supplying unit converting an input voltage into a predetermined driving voltage so as to supply the driving voltage to an LED channel; and a driving unit amplifying a detection voltage detected based on a current from the LED channel by a predetermined gain and controlling the current flowing through the LED channel so that the amplified detection voltage has a level equal to that of a predetermined reference voltage. | 04-30-2015 |
| 20150115841 | METHOD AND APPARATUS FOR PRODUCING SITUATIONAL ACOUSTO-OPTIC EFFECT - A method and an apparatus for producing situational acousto-optic effect are provided. In the method, a sound signal is detected and a fast Fourier transform (FFT) and a normalization calculation are performed on the sound signal to produce a frequency domain signal. Then, a plurality of frequencies having variations between the frequency domain signals produced before and after a time point are determined whether to fit in with a frequency spectrum of a specific tone. Once the frequencies fit in with the frequency spectrum, a light source is controlled to produce light with a color corresponding to the specific tone. | 04-30-2015 |
| 20150115842 | HF SYSTEM FOR A HIGH-FREQUENCY LAMP - The invention relates to an HF system that comprises an HF device ( | 04-30-2015 |
| 20150123572 | ILLUMINATION LIGHT SOURCE - An illumination light source includes: a light-emitting unit; a disturbance detecting unit which detects a specific disturbance; a timer circuit that times a first period and a second period, the first period starting from when the disturbance detecting unit detects the specific disturbance, a second period immediately following after the first period; and a driving circuit that turns ON the light-emitting unit at a start of the first period, causes the light-emitting unit to emit light during the first period, causes the light-emitting unit to emit light that is different from the light emitted during the second period, and turns OFF the light-emitting unit at an end of the second period. | 05-07-2015 |
| 20150123573 | LED ACTUATING DEVICE AND METHOD - An LED actuating device comprises an LED actuating module, the LED actuating module comprises a micro-programmed control unit (MCU), a VF-value detection module, an actuator and an LED lamp unit; the MCU receives the VF value detected by the VF-value detection module; when the VF value is greater than or equal to a first boundary value, the LED lamp unit is actuated to operate in the constant current area at the first constant actuating current by the actuator; when the VF value is less than the first boundary value, the LED lamp unit is actuated to operate in the regulation area at the continuous step-down actuating current by the actuator until the VF is equal to the second boundary value, and the second boundary value is less than the first boundary value. | 05-07-2015 |
| 20150123574 | LED ACTUATING DEVICE AND METHOD - An actuating device comprises an LED actuating module. Said LED actuating module comprises a micro-programmed control unit (MCU), an actuator, a VF-value detection module, a PN-junction temperature acquisition module and an LED lamp unit. The MCU determines the current value matched with the LED lamp unit based on the VF value detected by the VF-value detection module and the temperature value detected by the PN-junction temperature acquisition module, and then determines the width of the PWM pulse output to the actuator according to the current value, and the actuator actuates an LED to operate at the matched current value. | 05-07-2015 |
| 20150123575 | COMMUNICATION SYSTEM - A system according to various embodiments of the disclosure includes a bus and a plurality of devices coupled to the bus, the devices configured to communicate with each other via the bus. The system further includes a power supply coupled to the bus, the power supply for supplying power to the plurality of devices via the bus. The power supply is configured to detect an event, and in response to the event, alternately supply power to the plurality of devices via the bus at a first current level or at a second current level, the second current level less than the first current level. Among other things, embodiments in this disclosure help allow additional devices to be used on a bus, even where the total power consumption of the devices would normally exceed a maximum defined by a bus architecture. Furthermore, various embodiments help allow a single gauge of wire to be used throughout a bus network (even where long lengths of wire are required) while still providing sufficient power to the devices connected to the bus. | 05-07-2015 |
| 20150130371 | BACKLIGHT UNIT AND A DISPLAY DEVICE HAVING THE SAME - A backlight unit includes a dimming signal generator configured to generate first and second pulse width modulation signals, first and second driving blocks configured to receive a driving voltage to emit a light, a controller configured to receive the first and second pulse width modulation signals and an output signal from one of the first and second driving blocks to generate a voltage control signal, and a voltage converter configured to control a level of an input voltage in response to the voltage control signal to generate the driving voltage. | 05-14-2015 |
| 20150130372 | LOAD CONTROL DEVICE FOR A LIGHT-EMITTING DIODE LIGHT SOURCE - A load control device for controlling the amount of power delivered to an electrical load is able to operate in a burst mode to adjust the amount of power delivered to the electrical load to low levels. The load control device comprises a control circuit that operates in a normal mode to regulate an average magnitude of a load current conducted through the load to a target load current that ranges from a maximum rated current to a minimum rated current. The control circuit operates in the burst mode to regulate the average magnitude of the load current below the minimum rated current. During the burst mode, the control circuit regulates a peak magnitude of the load current to the minimum rated current during a first time period, and stops regulating the load current during a second time period, such that the average magnitude of the load current is below the minimum rated current. | 05-14-2015 |
| 20150137705 | APPARATUS AND METHOD FOR DRIVING LED DISPLAY - This disclosure provides an output stage for a LED driver circuit. The output stage has an input module, a regulator module for maintaining a constant internal voltage, and an output module for generating output signals. | 05-21-2015 |
| 20150137706 | POWER CONVERSION APPARATUS AND METHOD - The power conversion apparatus converts power among a plurality of ports, and includes: a first voltage conversion unit that converts a voltage of a first port and outputs power having the converted voltage to a second port; and a second voltage conversion unit that performs a first operation of converting a voltage of one port of the second port and a third port and outputting power having the converted voltage to the other port, or a second operation of converting a voltage of the other port and outputting power having the converted voltage to the one port, and when performing the first operation the second voltage conversion unit switches from the first operation to the second operation when a vehicle condition where power of the one port is insufficient is detected. | 05-21-2015 |
| 20150137707 | LIGHT EMITTING DIODE DRIVING APPARATUS - A primary side regulation (PSR) type light emitting diode (LED) driving apparatus may be capable of precisely controlling output power. The LED driving apparatus may include: a power supplying unit converting an input power input to a primary side of the apparatus and supplying a driving power to the LED positioned on a secondary side of the apparatus; a secondary side feedback unit positioned on the secondary side and providing an output control signal based on a current flowing in the LED and a dimming signal; a dimmer positioned on the secondary side and providing the dimming signal; and a primary side feedback unit positioned on the primary side and transferring a feedback signal to the power supplying unit based on a detection signal obtained by indirectly detecting power induced in the secondary side and the output control signal. | 05-21-2015 |
| 20150145438 | VARIABLE RESISTANCE DEVICE FOR REDUCED POWER DISSIPATION IN DIMMER COMPATIBILITY CIRCUITS - A variable resistance device may be used in a dimmer compatibility circuit to reduce power dissipation in an integrated circuit of the dimmer compatibility circuit. For example, the integrated circuit may include switches coupled to resistors external to the integrated circuit. The integrated circuit may operate the switches to commutate among the external resistors and select a voltage drop that reduces a voltage at a drain voltage of the switches. The reduced drain voltage reduces power dissipation in the switches and instead dissipates the power in the external resistors. | 05-28-2015 |
| 20150145439 | PRE-CHARGING INDUCTOR IN SWITCHING CONVERTER TO ACHIEVE HIGH PWM DIMMING RATIO IN LED DRIVERS - In a method for controlling a current regulator for dimming an LED load, a dimming signal has a duty cycle that controls the LED ON-time and LED OFF time at a fixed frequency. The regulator is controlled by the dimming signal to only supply current to the LED load during the LED ON-time. The regulator includes an inductor. The inductor current at the end of an ON-time is detected and its value is stored. During the OFF-time, the inductor is pre-charged to the current level matching the stored value, while the regulator's feedback loop is frozen during the OFF-time to not change its feedback control signal. Upon the next ON-time, the regulator begins supplying current to the LED load with the pre-charged inductor current, so there is no initial decrease in the delivered LED current. Therefore, the current pulse magnitudes are constant even with very low duty cycles. | 05-28-2015 |
| 20150145440 | ORGANIC EL PANEL AND METHOD FOR MANUFACTURING LIGHT-EMITTING DEVICE USING THE SAME - An organic EL panel with less variation in an emission luminance thereof and a method for manufacturing a light-emitting device using the same are provided. The organic EL panel of the present invention includes: a substrate; a light-emitting section of the organic EL panel provided on the substrate; a current supply terminal provided on the substrate for supplying a current to the light-emitting section; and a current density adjusting section electrically connected to the current supply terminal in parallel to the light-emitting section and provided on the substrate. A current density of the light-emitting section is adjusted by processing of the current density adjusting section. Moreover, in the method for manufacturing a light-emitting device according to the present invention, after a light-emitting characteristic is adjusted by processing a post-processing region of the above-described organic EL panel, a light-emitting device including the processed organic EL panel is manufactured. | 05-28-2015 |
| 20150145441 | SYSTEMS AND METHODS OF APPLYING BLEED CIRCUITS IN LED LAMPS - A bleed circuit is applied to a transformer based on a bleed-on time and a bleed-off time determined by monitoring an output voltage waveform of the transformer. | 05-28-2015 |
| 20150296574 | PSRR Control Loop with Configurable Voltage Feed Forward Compensation - The present document relates to the compensation of voltage variations within power converters. A driver circuit for a solid state light source is described. The driver circuit comprises a switched-mode power converter comprising a switch; wherein the switched-mode power converter is configured to convert an input voltage at an input of the switched-mode power converter into an output voltage at an output of the switched-mode power converter. Furthermore, the driver circuit comprises current sensing means configured to determine a sensed current signal indicative of a current through the switch; and voltage sensing means configured to determine a sensed voltage signal indicative of the input voltage. In addition, the driver circuit comprises a control unit configured to determine a gate control signal for putting the switch into an off-state, based on the sensed current signal and based on the sensed voltage signal. | 10-15-2015 |
| 20150296583 | DIMMING DRIVE CIRCUIT AND ILLUMINATION APPARATUS INCLUDING THE DIMMING DRIVE CIRCUIT - Various embodiments may relate to a dimming drive circuit for an illumination apparatus and an illumination apparatus including the dimming drive circuit, wherein the dimming drive circuit includes a filter circuit unit and a bleeder circuit unit, a main control module connected to the filter circuit unit and the bleeder circuit unit, respectively, and an auxiliary control module configured to reduce the current of the bleeder circuit unit and/or to switch off the bleeder circuit unit according to a characteristic input current of the dimming drive circuit prior to switch-off of the bleeder circuit unit by the main control module in a first operation state of the dimming drive circuit, and to prevent the filter circuit unit from releasing electrical energy via the bleeder circuit unit in a second operation state of the dimming drive circuit. | 10-15-2015 |
| 20150305104 | POWER CONVERTER BETWEEN HALOGEN TRANSFORMER AND LED - Control circuits ( | 10-22-2015 |
| 20150311808 | APPARATUS, SYSTEM AND METHOD FOR CASCADED POWER CONVERSION - An apparatus, method, and system are provided for power conversion to supply power to a load such as a plurality of light emitting diodes. An exemplary apparatus comprises: a first power converter stage having a first power switch and a first inductive element; a second power converter stage having a second power switch and a second inductive element; a plurality of sensors; and a controller. The second power converter stage provides an output current to the load. The controller is adapted to use a sensed input voltage to determine a switching period, and is further adapted to turn the first and second power switches into an on-state at a frequency substantially corresponding to the switching period while maintaining a switching duty cycle within a predetermined range. | 10-29-2015 |
| 20150312991 | DIMMING CONTROL DEVICE AND METHOD - The present invention relates to a dimming control device and method, and a dimming control device according to an embodiment of the present invention may control the ON/OFF of a lamp depending on whether a power pad is touched, and control the brightness of the lamp depending on whether dimming pads are touched. Thus, a user may control brightness step by step and may conveniently manipulate each step of brightness. | 10-29-2015 |
| 20150318787 | LOAD CONTROL DEVICE FOR A LIGHT-EMITTING DIODE LIGHT SOURCE - A load control device for controlling the amount of power delivered to an electrical load is able to operate in a burst mode to adjust the amount of power delivered to the electrical load to low levels. The load control device comprises a control circuit that operates in a normal mode to regulate an average magnitude of a load current conducted through the load to a target load current that ranges from a maximum rated current to a minimum rated current. The control circuit operates in the burst mode to regulate the average magnitude of the load current below the minimum rated current. During the burst mode, the control circuit regulates a peak magnitude of the load current to the minimum rated current during a first time period, and stops regulating the load current during a second time period, such that the average magnitude of the load current is below the minimum rated current. | 11-05-2015 |
| 20150326118 | DRIVER METHOD - The invention provides advances in the arts with useful and novel driver methods. The invention provides circuit driver and control methods for relatively high-current drivers, usable with relatively low-voltage battery power sources. Preferred embodiments include one or more high series resistance capacitors electrically connected with a power source. A low resistance driver circuit regulates power supplied from the capacitors to the load. | 11-12-2015 |
| 20150342005 | METHOD AND APPARATUS FOR CONTROLLING ELECTRICAL POWER USAGE BASED ON EXACT SUN ELEVATION ANGLE AND MEASURED GEOGRAPHICAL LOCATION - A method and apparatus are provided to control artificial lighting using accurate geographical location, date and time, in order to activate such electrical activity only during needed periods of actual terrestrial darkness related to sun elevation. Accurate, real-time calculation of sun elevation relative to geographical location and date/time allow natural lighting characteristics such as natural light spectrum and intensity to be matched to artificial lighting, in order to provide a smooth transition in ambient lighting and to save energy. An apparatus according to the invention comprises a global positioning system (GPS) element for determining latitude, longitude, altitude, date and time and a calculation element for determining sun elevation angle accurately. A specific embodiment requires only desired sun elevation angle inputs from the user for controlling electrical switches in a control system. | 11-26-2015 |
| 20150351175 | FEEDBACK CIRCUIT, CONTROL CIRCUIT, AND POWER SUPPLY APPARATUS INCLUDING THE SAME - A feedback circuit includes a detection voltage regulating unit outputting a regulation voltage by comparing a detection voltage associated with a current flowing in a light emitting diode channel with a reference voltage, a path forming unit forming a current path depending on the regulation voltage, and a feedback signal generating unit generating a feedback signal depending on a current flowing in the current path. | 12-03-2015 |
| 20150351183 | TRANSIENT POWER COMMUNICATION - A power supply system providing communication from a master module to at least one slave module via transients, to alter operation of a load, is provided. The master module output a supply voltage that is either a normal supply voltage or a reduced supply voltage. The outputted supply voltage depends on input corresponding to a communication to be sent to the slave module to alter operation of the load of the slave module. The slave module receives the supply voltage and interprets the received supply voltage, which may vary between the normal and reduced supply voltages, to determine what the communication from the master module is. The slave module then uses information from the communication to appropriately alter operation of its load. | 12-03-2015 |
| 20150359052 | SWITCHED MODE POWER SUPPLY - A switched mode power supply comprising: a rectified voltage terminal and a rectified ground terminal for receiving a phase-cut rectified voltage; a power switch and an inductive element connected in series between the rectified voltage terminal and the rectified ground terminal; a switch controller having a floating ground terminal and a dimming input terminal, wherein the dimming input terminal is for receiving a dimming voltage signal indicative of a required dimming level, wherein the switch controller is configured to control the switch in accordance with the dimming voltage signal and wherein the inductive element is connected between the rectified ground terminal and the floating ground terminal; and a dimming level controller configured to set the dimming voltage signal in accordance with the rectified phase-cut voltage with respect to the floating ground terminal. | 12-10-2015 |
| 20150366033 | Illuminating Display Systems - An exemplary system comprises a power regulator and an emitting apparatus. The emitting apparatus is typically attached to or integrated with a display object, such as a merchandise package or container. A support structure, such as a point of purchase display, typically contains or supports one or more power regulators and display objects. The power regulator comprises a controller and a primary inductor, and the controller is adapted to provide a voltage or current to the primary inductor to generate a first primary inductor voltage. The emitting apparatus comprises an illumination source and a secondary inductor coupled to the illumination source. The illumination source is adapted to emit visible light when the power regulator is in an on state and when the secondary inductor is within a predetermined distance of the primary inductor. In exemplary embodiments, the first and second inductors are substantially planar. | 12-17-2015 |
| 20150366039 | SYSTEM AND METHOD FOR LIGHT SOCKET ADAPTATION - A light socket adaptation system and method. A light socket adapter module comprises a female end designed to accept a light bulb, a male end designed to be placed in an existing light socket, Wi-Fi transmit/receive circuitry, Bluetooth LE transmit/receive circuitry, a processor that processes instructions received via one or more of the Wi-Fi transmit/receive circuitry and the Bluetooth LE transmit/receive circuitry, wherein the instructions are received from one or more of a remote server system and a mobile computing device, wherein the processor executes Bluetooth LE instructions to cause the light socket adapter module to detect Bluetooth LE enabled devices within a detection proximity of the light socket adapter module, and power supply control circuitry controllable by the processor, wherein the power supply control circuitry controls power supplied to a light bulb positioned in the female end of the light socket adapter module. | 12-17-2015 |
| 20150372667 | SIGNAL CROSSING DETECTION - Various aspects of the present disclosure are directed to detecting crossings such as zero crossings that can pose problems to circuit operation. In accordance with an example embodiment, two or more circuits are implemented for detecting signal crossings of an electrical signal during respective time cycles, such that at least one of the circuits is operating to detect such a crossing at all times. Each circuit undergoes a reset condition, which is controlled to ensure that at least one circuit remains operating for detecting zero crossing. | 12-24-2015 |
| 20150382424 | Illumination Device and Method for Controlling an Illumination Device over Changes in Drive Current and Temperature - An illumination device and method is provided herein for controlling individual light emitting diodes (LEDs) in an LED illumination device, so that a desired luminous flux and a desired chromaticity of the device can be maintained over changes in drive current and temperature. According to one embodiment, the illumination device comprises a plurality of emission LEDs, a storage medium, an LED driver and receiver circuit and a control circuit. The storage medium may store a table of calibration values correlating forward voltage and drive current to chromaticity and luminous flux at a plurality of temperatures for each of the plurality of emission LEDs. The LED driver and receiver circuit may apply respective drive currents to the emission LEDs to produce substantially continuous illumination, and may periodically turn the emission LEDs off to measure operating forward voltages that develop across each emission LED. The control circuit may determine whether a target luminance setting or a target chromaticity setting for the illumination device has changed, and if so, may determine new respective drive currents needed to achieve the target luminance setting and the target chromaticity setting using the operating forward voltages measured across each emission LED, the table of calibration values and one or more interpolation techniques. | 12-31-2015 |
| 20150382425 | Illumination Device and Method for Calibrating and Controlling an Illumination Device Comprising a Phosphor Converted LED - An illumination device described herein includes at least a phosphor converted LED, which is configured for emitting illumination for the illumination device, a first photodetector and a second photodetector. A spectrum of the illumination emitted from the phosphor converted LED comprises a first portion having a first peak emission wavelength and a second portion having a second peak emission wavelength, which differs from the first peak emission wavelength. The first photodetector has a detection range, which is configured for detecting only the first portion of the spectrum emitted by the phosphor converted LED. The second photodetector has a detection range, which is configured for detecting only the second portion of the spectrum emitted by the phosphor converted LED. Methods are provided herein for calibrating and controlling each portion of the phosphor converted LED spectrum, as if the phosphor converted LED were two separate LEDs. | 12-31-2015 |
| 20150382431 | Electrically Illuminated Flame Simulator - An electrically powered flame simulator comprises at least two light sources, an integrated circuit electrically connected to the light sources for intermittently illuminating at least one of the light sources independently of other light sources such that the light sources together provide the effect of a flickering movement, and a power source for providing power to the integrated circuit. The flame simulator may be mounted in a decorative or ornamental device such as a candle or fire log, or used on decorative clothing, or may be part of a hazard or warning system. One or more solid state light sources may also be used. | 12-31-2015 |
| 20150382437 | STATE CHANGE DEVICES FOR SWITCHED ELECTRICAL RECEPTACLES - A state change device may be electrically connected to a switched receptacle, or to both the switched and unswitched receptacles, of an outlet. The state change device may generate a change of state signal when power is applied to, or removed from, the switched receptacle. The state change device may wirelessly communicate the signal. The state change device may include a load control circuit that may be configured to control the amount of power delivered to an electrical load that is electrically connected to the state change device. The state change device may receive commands directed to the load control circuit. The state change device may be deployed in a load control system and may operate as a control entity, such that the state change device may issue commands to one or more load control devices, responsive to the application or removal of power at the switched receptacle. | 12-31-2015 |
| 20160029461 | ILLUMINATION APPARATUS, METHOD OF CONTROLLING AN ILLUMINATION APPARATUS, TERMINAL FOR COMMUNICATING WITH AN ILLUMINATION DEVICE AND WIRELESS LIGHTING SYSTEM - An illumination apparatus comprises: a light emission unit to emit light; a communication module to receive a control signal to a control unit; and a control unit to extinguish or modify the luminosity of the light emitted based on the control signal received from the communication module, wherein the control signal is based on measuring a sound intensity of a sound input to a terminal device separate from the illumination apparatus. | 01-28-2016 |
| 20160029462 | METHOD FOR THE RELATIVE ACTIVATION OF A LUMINAIRE, CONTROL UNIT AND LIGHTING SYSTEM - For the relative activation of a luminaire, actuation of an actuating element, particularly of a pushbutton, is detected. During actuation of the actuating element, the following steps are performed cyclically: ascertainment of a target control point (P | 01-28-2016 |
| 20160036349 | LOAD CONTROL DEVICE FOR CONTROLLING A DRIVER FOR A LIGHTING LOAD - A load control device is configured to generate a control signal having a desired magnitude for controlling a load regulation device adapted to control the power delivered to an electrical load. The load control device may comprise a control terminal arranged to provide the control signal to the load regulation device, a communication circuit for generating the control signal, and a control circuit configured to generate an output signal that is provided to the communication circuit. The communication circuit may be characterized by non-linear operation. The control circuit may adjust the magnitude of the output signal in response to the difference between the magnitude of the control signal and the desired magnitude to adjust the magnitude of the control signal towards the desired magnitude. The control circuit may also be configured to determine if an incompatible load regulation device is coupled to the load control device. | 02-04-2016 |
| 20160037604 | SYSTEMS AND METHODS FOR DIMMING CONTROL USING SYSTEM CONTROLLERS - System and method for dimming control. The system includes a system controller, a transistor, and a resistor. The system controller includes a first controller terminal and a second controller terminal. The transistor includes a first transistor terminal, a second transistor terminal and a third transistor terminal. The resistor including a first resistor terminal and a second resistor terminal. The first transistor terminal is coupled, directly or indirectly, to the second controller terminal. The first resistor terminal is coupled to the second transistor terminal. The second resistor terminal is coupled to the third transistor terminal. The system controller is configured to receive an input signal at the first controller terminal and to generate an output signal at the second controller terminal. The transistor is configured to receive the output signal at the first transistor terminal and to change between a first condition and a second condition. | 02-04-2016 |
| 20160066393 | LIGHTING SYSTEM OPERATION MANAGEMENT METHOD - A method for automatic lighting system control, including: receiving a first light parameter value selection from a user account associated with the lighting system; controlling lighting elements of the lighting system to meet the first light parameter value; automatically determining a second light parameter value based on the first light parameter value and a user perception profile relating light parameter values with perceived light output values; and incrementally adjusting lighting element operation to meet the second light parameter value over a predetermined time period. | 03-03-2016 |
| 20160072378 | ACTIVE POWER FACTOR CORRECTION CONTROL CIRCUIT, CHIP AND LED DRIVING CIRCUIT THEREOF - In one embodiment, an active power factor correction (APFC) control circuit, configured to generate a pulse-width modulation (PWM) control signal to control the operation of a power converter, can include: (i) an inductor current zero crossing detection circuit coupled to a common node between a power switch of the power converter and a first switch that are coupled in series, where the inductor current zero crossing detection circuit is configured to generate a comparison signal based on a voltage signal at the common node; (ii) the comparison signal being activated when an inductor current of the power converter decreases to zero; and (iii) the APFC control circuit being configured as a source driver, wherein a control terminal of the power switch is coupled to a constant voltage supply. | 03-10-2016 |
| 20160073456 | Operating Circuit for LEDs, Having Voltage Measurement - The invention relates to an operating circuit for an LED series, having: a converter, particularly a DC-DC converter, having a controllable switch (S | 03-10-2016 |
| 20160073460 | FORWARD CONVERTER HAVING A PRIMARY-SIDE CURRENT SENSE CIRCUIT - A load control device for controlling the amount of power delivered to an electrical load (e.g., an LED light source) comprises an isolated forward converter comprising a transformer, a controller, and a current sense circuit operable to receive a sense voltage representative of a primary current conducting through to a primary winding of the transformer. The primary winding is coupled in series with a semiconductor switch, while a secondary winding is adapted to be operatively coupled to the load. The forward converter comprises a sense resistor coupled in series with the primary winding for producing the sense voltage that is representative of the primary current. The current sense circuit receives the sense voltage and averages the sense voltage when the semiconductor switch is conductive, so as to generate a load current control signal that is representative of a real component of a load current conducted through the load. | 03-10-2016 |
| 20160073463 | DRIVING CURRENT GENERATION CIRCUIT, LED POWER SUPPLY MODULE AND LED LAMP - A driving current generation circuit includes a semiconductor device configured to operate with a variable voltage as a reference voltage, a driving current generator configured to generate a driving current for driving an LED (Light Emitting Diode) based on an instruction received from the semiconductor device, and a dimming voltage converter configured to generate a second dimming voltage set based on the variable voltage from a first dimming voltage set based on a ground voltage, wherein the semiconductor device performs a driving control of the driving current generator based on the second dimming voltage. | 03-10-2016 |
| 20160088701 | LED Control System - A LED control circuit is disclose which comprises a silicon-controlled rectifier (SCR) configured to control a first current supplied to a LED light bulb, and a dynamic current maintenance module serially coupled to the SCR and configured to draw a second current from the SCR, the second current being inversely proportional to the first current. | 03-24-2016 |
| 20160095193 | Device and method for controlling a lighting means - A device for controlling a lighting means is provided, which comprises at least one communication means, configured to receive first data and transmit second data via at least one wireless communication network and to at least partially forward the first data. The at least partially forwarded first data comprise third data. The device also comprises at least one security means, configured to at least partially decrypt the third data and to at least partially encrypt fourth data. The second data are at least partially based on the at least partially encrypted fourth data. The device also comprises at least one signal processing means, configured to control a lighting means connected to the device at least partially depending on the at least partially encrypted third data, to at least partially generate and/or to receive the fourth data, and to forward the received and/or generated fourth data. | 03-31-2016 |
| 20160100468 | BIDIRECTIONAL VOLTAGE DIFFERENTIATOR CIRCUIT - A bidirectional voltage differentiator circuit comprises start-up circuitry, sensing circuitry, and output circuitry coupled to logic circuitry. The start-up circuitry acts to start-up the sensing circuitry when the circuit is powered on, and accelerates the response of the sensing circuitry thereafter. The sensing circuitry senses variation in an input voltage applied to an input node. Responsive to the voltage variation sensed by the sensing circuitry, the output circuitry produces a state change at a first or second output node. The logic circuitry receives the states of the output nodes and produces a logic output signal to indicate the occurrence of the variation sensed in the input voltage. The voltage sensing circuit is operable to sense variation of the input voltage regardless of whether the voltage is rising or falling and without regard to the DC value of the input voltage. | 04-07-2016 |
| 20160113084 | DIGITAL CONTROL METHOD FOR LOW OUTPUT DIMMING OF LIGHT EMITTING DIODE (LED) DRIVERS - A method for mitigating visual fluctuation of light output at low pulse width modulation levels is disclosed. The method comprises at least the step of comparing the percent change of a previously applied input voltage value to the pulse width modulation output. | 04-21-2016 |
| 20160113086 | LOAD CONTROL DEVICE FOR A LIGHT-EMITTING DIODE LIGHT SOURCE - A load control device for controlling the amount of power delivered to an electrical load is able to operate in a burst mode to adjust the amount of power delivered to the electrical load to low levels. The load control device comprises a control circuit that operates in a normal mode to regulate an average magnitude of a load current conducted through the load to a target load current that ranges from a maximum rated current to a minimum rated current. The control circuit operates in the burst mode to regulate the average magnitude of the load current below the minimum rated current. During the burst mode, the control circuit regulates a peak magnitude of the load current to the minimum rated current during a first time period, and stops regulating the load current during a second time period, such that the average magnitude of the load current is below the minimum rated current. | 04-21-2016 |
| 20160113094 | Lighting Control with Automated Activation Process - Lighting fixture control systems and method are described including a control station configured to communicate with a plurality of remotely located fixture control devices that are associated with lighting fixtures. Individual fixture control devices may be configured to perform automatic activation operations, that include the fixture control device determining one or more of an identifier of the node, a GPS coordinate of the node, an operating Voltage of the node, a lamp Wattage of the lighting device, a lamp type of the lighting fixture, and a dimming capability of the lighting fixture. The fixture control device may be configured to send results of the automatic activation operation to the control station. The control station may be configured to store a file associated with the node, including the received results of the automatic activation operation. | 04-21-2016 |
| 20160113096 | LIGHTING CONTROL WITH INTEGRAL DIMMING - Lighting control devices, network systems, and methodologies, including methods for providing closed-loop dimming control of such systems, are described. In some examples, disclosed methods and device configurations may include an intelligent photo control configured to accept target dimmed fixture wattage value commands from a user, and provide closed-loop control at the fixture to achieve that target wattage via real-time adjustment of the 0-10V dimming control signal sent to the LED driver. As such, the need for trial-and-error adjustments of the 0-10V analog control voltage, or derivation of dim voltage to fixture wattage response curves in order to achieve a desired fixture wattage level, may be reduced or eliminated. | 04-21-2016 |
| 20160119755 | SYSTEM AND METHOD FOR ESTIMATING THE POSITION AND ORIENTATION OF A MOBILE COMMUNICATIONS DEVICE IN A BEACON-BASED POSITIONING SYSTEM - An example of a lighting device including a light source, a modulator and a processor. The processor is configured to control the light source to emit light for general illumination and control the modulator to modulate the intensity of the emitted light to superimpose at least two sinusoids. Frequencies of the at least two sinusoids enable a mobile device to infer the physical location of the lighting device. | 04-28-2016 |
| 20160119761 | SYSTEM AND METHOD FOR ESTIMATING THE POSITION AND ORIENTATION OF A MOBILE COMMUNICATIONS DEVICE IN A BEACON-BASED POSITIONING SYSTEM - An example of a lighting device including a light source, a modulator and a processor. The processor is configured to control the light source to emit light for general illumination and control the modulator to modulate the intensity of the emitted light to superimpose at least two sinusoids. Frequencies of the at least two sinusoids enable a mobile device to infer the physical location of the lighting device. | 04-28-2016 |
| 20160119991 | ILLUMINATION LAMP AND ILLUMINATION DEVICE - An illumination lamp includes: an input portion connectable to any one of power supply portions for two or more starting methods including a rapid-start method; a voltage detection circuit configured to detect a voltage applied from a power supply portion; and a control portion including at least one first voltage supply portion configured to supply a voltage suitably for the rapid-start method to a semiconductor light-emitting device, and at least one second voltage supply portion configured to supply a voltage suitably for the other fluorescent-lamp starting method to the semiconductor light-emitting device. The control portion causes, if the voltage is detected by the voltage detection circuit, the first voltage supply portion to supply a voltage to the semiconductor light-emitting device, but causing, if the voltage is not detected by the voltage detection circuit, the second voltage supply portion to supply a voltage to the semiconductor light-emitting device. | 04-28-2016 |
| 20160119993 | LIGHT SOURCE DRIVER - Various embodiments of a light source driver are disclosed. In one embodiment, the light source driver may have a driving transistor coupled directly to at least one light source without having additional switches such that the light source driver may be operated with a low voltage supply. Optionally, the light source drivers may have a bypassing circuit configured to reduce power consumption, and peaking current generator configured to speed up the turn on time of the at least one light source. At least some of the circuits, and block diagrams disclosed herein may be implemented using conventional CMOS design and manufacturing techniques and processes to provide, for example, at least one or more integrated circuits. | 04-28-2016 |
| 20160119998 | APPARATUS FOR CONTROLLING LIGHT MODULE - Apparatuses for controlling light modules ( | 04-28-2016 |
| 20160134196 | Converter One Pin Sensing - Power converters, such as switched-mode power converters comprise a reduced number of sensing pins. A power converter is configured to convert electrical energy at an input voltage into electrical energy at an output voltage. The power converter comprises a power switch configured to be switched between on- and off-states; and a controller configured to generate a control signal for putting the power switch into the on-state and off-state, respectively; wherein the control signal is generated based on a first and second measurement signal from the power converter external to the controller. The controller comprises a sensing pin configured to sense the first measurement signal, when the power switch is in on-state, and configured to sense the second measurement signal, when the power switch is in off-state. | 05-12-2016 |
| 20160135265 | Control System for Phase-Cut Dimming - A phase-cut dimming control system according to the embodiment includes a phase angle detector configured to detect a phase angle of an input voltage generated by phase-cut dimming, a feedback signal generator configured to generate a first reference signal corresponding to the detected phase angle, and generate an initial feedback signal based on a detection signal corresponding to power supplied to a load and the first reference signal, a feedback signal modulator configured to modulate the initial feedback signal and generate a feedback signal, a power transmission controller configured to generate a control signal which controls power transmission according to the feedback signal, and a power transmission circuit configured to transmit power to the load according to the control signal. | 05-12-2016 |
| 20160142137 | Method for Implementing Dimming, and Dimming Apparatus - A method and apparatus for implementing dimming are disclosed. The method includes: at an MAC layer, dividing an MSDU into two or more sub-MSDUs with a same length; encapsulating each sub-MSDU obtained after dividing into a separate MPDU, and generating a compensation frame for each MPDU; and aggregating the MPDUs and the compensation frames with the same addresses into a PSDU part of a PPDU and transmitting a physical frame. | 05-19-2016 |
| 20160150613 | LED POWER SUPPLY DEVICE - An LED power supply device disclosed in the present specification includes a DC dimmer circuit that performs dimming control of an LED such that the higher a reference voltage variably controlled according to a dimmer signal is, the smaller a current flowing in the LED is. This configuration makes it possible to achieve fine dimming control. | 05-26-2016 |
| 20160157327 | LIGHTING SYSTEM | 06-02-2016 |
| 20160165687 | BALLAST TYPE DETECTING CIRCUIT AND LIGHT EMITTING DIODE LIGHTING APPARATUS HAVING THE SAME - A ballast type detecting circuit includes a ballast signal clamping circuit coupled to a ballast, wherein the ballast signal clamping unit is configured to clamp an output of the ballast, and a ballast type detection circuit configured to compare first and second reference clocks and the clamped output of the ballast to determine a type of the ballast, each of the first and second reference clocks having a frequency lower than an output frequency of a first type ballast and higher than an output frequency of a second type ballast. Thus, the ballast type detecting circuit detects a type of electronic ballast and magnetic ballast based on a digital output signal and decreases a number of outside circuit elements through a ballast type detection based on a digital output signal. | 06-09-2016 |
| 20160165690 | CUSTOMIZED AUDIO DISPLAY SYSTEM - A lighting display system is coordinated with an operating parameter of a personalized audio play device. An object is to provide some display components representative of audio output or another operating parameter of a customized audio device. The system may operate in an environment where a customized audio device is provided which facilitates a user listening to ambient sounds through a personal speaker system where a customized audio device enhances the listening experience by modifying ambient audio and/or delivery of supplemental audio to the personal speakers. Once personalized listening devices are used in a live entertainment setting such as a festival, concert, or arena, LEDs or other color or pattern-coded lights or images may be embedded in personal speakers such as headphones or earphone devices. For example the lighting display may be part of a headphone top band, side cups, or a neck holder for earphones. The lighting display is manipulated by various controls setting off/on, colors, and/or images based on sounds heard by the device, the user, or based on ultrasonic, or RF communications received by the device or controlling connected devices | 06-09-2016 |
| 20160182035 | SEMICONDUCTOR DEVICE | 06-23-2016 |
| 20160183341 | Portable Lighting Devices | 06-23-2016 |
| 20160183342 | BACKLIGHT UNIT | 06-23-2016 |
| 20160190917 | COMPACT POWER CONVERSION DEVICE WITH CONTINUOUS OUTPUT REGULATION RANGE - The current invention relates to a power conversion device ( | 06-30-2016 |
| 20160198549 | System and Method for End-to-End Beaconing | 07-07-2016 |
| 20160205732 | DRIVE CIRCUIT FOR ILLUMINATING DEVICE AND ILLUMINATING DEVICE HAVING THE DRIVE CIRCUIT | 07-14-2016 |
| 20160255704 | LIGHTING COMMUNICATION ADVERTISING PACKETS | 09-01-2016 |
| 20160381753 | LED CONSTANT-VOLTAGE DIMMING POWER SUPPLY AND DIMMING SYSTEM FOR LED LAMP HAVING SAME - An LED constant-voltage dimming power supply being electrically connected to a dimmer and configured for changing duty ratio of output voltage thereof according to a controlling signal from the dimmer, includes a constant-voltage source, a damping discharge circuit module, a phase detecting circuit module, a duty ratio controlling module, and a switcher. The damping discharge circuit module is electrically connected to an input end of the constant-voltage source. The phase detecting circuit module is electrically connected to an output end of the constant-voltage source. The duty ratio controlling module is coupled to the phase detecting circuit. The switcher is electrically connected to the duty ratio controlling module. The LED constant-voltage dimming power supply adjusts the luminance of the LED lamp and has high universality. Moreover, each of lots of LED lamps has high consistency during adjusting its luminance. | 12-29-2016 |
| 20160381769 | LUMINAIRE AND ILLUMINATION SYSTEM - A luminaire includes a light source; a wireless communication circuit for communicating with a dimming controller; a storage which stores an identifier of the dimming controller; and a control circuit for dimming light of the light source according to a dimming command transmitted from the dimming coat roller when the luminaire is in a paired state, i.e., a state in which the identifier of the dimming controller is stored in the storage of the luminaire. When the control circuit is in a communication check mode, i.e., a mode for checking whether or not the luminaire is able to communicate with the dimming controller, the control circuit, regardless of whether or not the luminaire is in the paired state with the dimming controller, brings the luminaire into a predetermined illumination state by dimming light of the light source when the wireless communication circuit receives a communication cheek command from the dimming controller. | 12-29-2016 |
| 20160381771 | WIRELESS DETECTION DEVICE AND LIGHTING DEVICE INCLUDING THE SAME - A wireless detection device may be applied to a lighting device. The wireless detection device may include a connection interface, a detection module, a processing module and a wireless communication module. The connection interface may be detachable coupled to the power conversion module of the lighting device, and coupled to the lighting module of the lighting device via the power conversion module. The detection module may be coupled to the connection module and may detect the change of the environment around the detection module to generate a detection signal. The processing module may be coupled to the detection module and the connection module. The wireless communication module may be coupled to the processing module. The detection module may transmit the detection signal to the power conversion module via the connection interface and/or transmit the detection signal to other lighting devices via the wireless communication module. | 12-29-2016 |
| 20170238382 | FORWARD CONVERTER HAVING A PRIMARY-SIDE CURRENT SENSE CIRCUIT | 08-17-2017 |
| 20170238400 | LIGHT BULB ADAPTER | 08-17-2017 |
| 20180027622 | LIGHTING DEVICE, AND LUMINAIRE | 01-25-2018 |
| 20180027627 | Portable Lighting Devices | 01-25-2018 |
| 20180027631 | PROTOCOL FOR LIGHTING CONTROL VIA A WIRELESS NETWORK | 01-25-2018 |
| 20180027632 | LOW POWER BATTERY MODE FOR WIRELESS-ENABLED DEVICE PRIOR TO COMMISSIONING | 01-25-2018 |
| 20180027635 | LOW POWER BATTERY MODE FOR WIRELESS-ENABLED DEVICE PRIOR TO COMMISSIONING | 01-25-2018 |
| 20220141933 | LLC STAGE FOR LED DRIVERS - The invention relates to an LLC stage for an LED driver ( | 05-05-2022 |
