| Entries |
| Document | Title | Date |
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| 20080211421 | Light Emitting Device For Ac Power Operation - Disclosed is an improved light-emitting device for an AC power operation. A conventional light emitting device employs an AC light-emitting diode having arrays of light emitting cells connected in reverse parallel. The arrays in the prior art alternately repeat on/off in response to a phase change of an AC power source, resulting in short light emission time during a ½ cycle and the occurrence of a flicker effect. An AC light-emitting device according to the present invention employs a variety of means by which light emission time is prolonged during a ½ cycle in response to a phase change of an AC power source and a flicker effect can be reduced. For example, the means may be switching blocks respectively connected to nodes between the light emitting cells, switching blocks connected to a plurality of arrays, or a delay phosphor. Further, there is provided an AC light-emitting device, wherein a plurality of arrays having the different numbers of light emitting cells are employed to increase light emission time and to reduce a flicker effect. | 09-04-2008 |
| 20080218098 | Light Emitting Device with Light Emitting Cells Arrayed - The present invention relates to a light emitting device. The light emitting device according to the present invention comprises a light emitting cell block having a plurality of light emitting cells; and a bridge rectifying circuit connected to input and output terminals of the light emitting cell block, wherein the bridge rectifying circuit includes a plurality of diodes between nodes. In manufacturing an AC light emitting device with a bridge rectifying circuit built therein, the present invention can provide a light emitting device capable of enhancing the reliability and luminance of the light emitting device by setting the size of diodes of the bridge rectifying circuit to be a certain size and controlling the number thereof. | 09-11-2008 |
| 20080278093 | Backlight module with light tubes and liquid crystal display with same - An exemplary backlight module ( | 11-13-2008 |
| 20080284347 | Lighting control system having a security system input - A lighting control system is operable to be coupled to a security system and is pre-programmed such that the control devices of the lighting control system behave out-of-box in a predetermined manner in response to the security system. The lighting control system comprises a contact closure input that is operable to be simultaneously coupled to both a momentary contact closure output and a maintained contact closure output of the security system. Preferably, the lighting control system enters a first mode of operation when the contact closure input detects a closure, enters a second mode of operation if the contact closure input continues to detect the closure after a predetermined amount of time, and enters a third mode of operation if the contact closure input no longer closed. Accordingly, the lighting control system is responsive to either the momentary contact closure output or the maintained contact closure output. | 11-20-2008 |
| 20080315784 | LED LAMP STRUCTURE - The present invention provides an LED lamp structure, including a circuit board, a circular coil, and a lamp housing. The circuit board has one or more LED light bulb mounted thereon, and the circular coil includes an iron core, a primary winding and a secondary winding, wherein the primary winding of the circular coil is connected with the lamp housing for conducting an AC power, and then, the secondary winding, which is connected with the circuit board, is induced to produce a DC power for transmitting to the circuit board, thereby lighting up the LED light bulb on the circuit board. | 12-25-2008 |
| 20090009101 | Oled Having Stacked Organic Light-Emitting Units - The present invention provides a stacked organic light emitting device, comprising a first conductive layer, at least one intermediate conductive layer and a second conductive layer, and light emitting units disposed between the conductive layers, wherein at least two non-neighboring conductive layers among the conductive layers are conductive layers belonging to Group 1 such that they are electrically connected with each other to a common potential; at least one non-neighboring conductive layer among the conductive layers which are not electrically connected with the conductive layers belonging to Group 1 to a common potential are conductive layers belonging to Group 2 such that they are electrically connected with each other to a common potential; and the conductive layers belonging to Group 1 and the conductive layers belonging to Group 2 are connected with each other via a voltage regulator for alternately applying a positive voltage and a negative voltage. | 01-08-2009 |
| 20090009102 | LIGHTING DEVICE WITH CONTROLLABLE LIGHT INTENSITY - It is presented a lighting device comprising: at least one alternating current source configured to provide alternating current of at least a first and a second frequency, at least one light source, at least one impedance unit connected to the light source, affecting a first current from the at least one alternating current source to flow through the at least one light source, wherein an impedance of the impedance unit is configured to be frequency controlled, such that when the alternating current is of the first frequency the first current is relatively high and when the alternating current is of the second frequency the first current is relatively low. A corresponding display device, television device and method are also presented. | 01-08-2009 |
| 20090015174 | LIGHT SOURCE APPARATUS AND DRIVING APPARATUS THEREOF - A light source apparatus and a driving apparatus thereof are provided. The driving apparatus includes a first node, a second node, a clock synchronization unit, a control unit, a switch unit, and a feedback unit. The driving apparatus receives an AC voltage through the first and the second nodes. The clock synchronization unit converts the AC voltage into a clock synchronization signal. The control unit converts a preset brightness value into a driving current, outputs an adjusting signal according to a timing of the clock synchronization signal, and modulates a pulse width of the adjusting signal according a feedback signal. The switch unit determines whether or not the AC voltage is provided to the light source module according to a control of the adjusting signal. The feedback unit detects a load state of the light source module, and outputs the feedback signal to the control unit according a detection result. | 01-15-2009 |
| 20090021178 | Apparatus and method for driving backlight unit - The present invention is directed to a drive apparatus for a backlight unit ( | 01-22-2009 |
| 20090091268 | AIRFIELD LIGHTING WITH LED - A method of feeding electric power to an LED ( | 04-09-2009 |
| 20090091269 | High Frequency Pulsed Supply For Discharge Lamps - The HIGH FREQUENCY PULSED SUPPLY FOR DISCHARGE LAMPS describes electronic converters for discharge lamps with high frequency pulsed current stabilization. A voltage inverter is employed either in a Full-Bridge configuration using peak current control or in a Half-Bridge configuration with a capacitive element. These converters allow the luminous intensity of the lamp to vary (dimming), as well as the frequency of the pulses over a wide frequency range, avoiding acoustic resonance to appear; they also allow a low frequency power variation, aiming to improve the color rendering index and correlated color temperature properties of the light emitted by certain types of discharge lamps, such as the high pressure sodium lamps. The converters present a significant reduction in the volume of the power circuit due to the removal of the magnetic element, being even more attractive as the power of the lamp increases. | 04-09-2009 |
| 20090096382 | DRIVE CONTROL CIRCUIT, EMISSION CONTROL CIRCUIT, COMMUNICATION APPARATUS AND DRIVE CONTROL METHOD - A drive control circuit sends out pulse signals of various pulse signals so as to control the light emission amount and luminance of LEDs by gradually increasing and decreasing the pulse width in predetermined cycles during predetermined periods based on parameters supplied from an LED drive controller that determine a first emission control processing period, a second emission control processing period, first to fourth slope periods and the like. The tone of an emitted color realized by a plurality of LEDs is controlled by synchronizing the periods of time of light emission control processings. | 04-16-2009 |
| 20090167202 | AC Light Emitting Diode And AC Led Drive Methods And Apparatus - An AC LED package and circuits are disclosed along with an AC LED driver. The AC LED circuit may include as few as one LED or an array of anti-parallel LEDs driven with AC power sources and AC LED drivers at various voltages and frequencies. The AC LEDs are pre-packaged in various forms and materials and designed for mains or high frequency coupling in various forms to AC power sources, inverter type drivers or packages. The AC LED driver is a fixed frequency driver that provides a relatively constant voltage output to different size loads within the wattage limitation of the driver and in some cases is a direct mains power source. | 07-02-2009 |
| 20090174337 | LED circuits and assemblies - An AC-driven LED circuit | 07-09-2009 |
| 20090174338 | LED DRIVE CIRCUIT - A LED drive circuit equipped with oscillator | 07-09-2009 |
| 20090206767 | SPLIT PHASE INVERTERS FOR CCFL BACKLIGHT SYSTEM - An apparatus and method for driving a lamp are provided. In one embodiment, an inverter having four switching elements is split into two inverter arms that are deployed at separate terminals of a floating lamp structure to achieve even light output. A controller drives both inverter arms such that power switching lines do not cross the floating lamp structure. In one embodiment, the controller adjusts the brightness of the lamp structure by adjusting the phase difference between outputs of a first inverter arm relative to a second inverter arm. In one embodiment, the controller adjusts the brightness by symmetrically pulse width modulating the outputs of the first inverter arm and the second inverter arm. | 08-20-2009 |
| 20090212712 | Electronic Ballast For A Low-Pressure Discharge Lamp With A Micro-Controller - The invention relates to an electronic ballast for a lamp, supplied with electrical energy from a power source, different to the mains AC network, comprising at least one electronic switch element for conversion of the supplied electrical power. According to the invention, a microcontroller controls the electronic switch element. | 08-27-2009 |
| 20090218954 | Sequential burst mode actlvation circuit - A sequential burst mode regulation system to deliver power to a plurality of loads. In the exemplary embodiments, the system of the present invention generates a plurality of phased pulse width modulated signals from a single pulse width modulated signal, where each of the phased signals regulates power to a respective load. Exemplary circuitry includes a PWM signal generator, and a phase delay array that receives a PWM signal and generates a plurality of phased PWM signals which are used to regulate power to respective loads. A frequency selector circuit can be provided that sets the frequency of the PWM signal using a fixed or variable frequency reference signal. | 09-03-2009 |
| 20090261746 | CONTROL OF LIGHT INTENSITY USING PULSES OF A FIXED DURATION AND FREQUENCY - A method and circuit to control the intensity of lights, illumination fixtures, and displays using pulses of a fixed duration and a fixed frequency (FD/FF) is provided. In particular, the method may be used to control one more light sources. By varying the number of pulses in a control burst, the total current flowing through the light source may be precisely controlled providing greater accuracy than other methods, such as, for example, PWM or variable pulse frequency. The FD/FF technique may be used in conjunction with any number of light sources, and finds particular application in LED displays and for any type of LED illumination fixture. | 10-22-2009 |
| 20090261747 | Control system for multiple fluorescent lamps - The present invention is directed to an apparatus that drives a lighting system with multiple lamps. A phase shift mechanism is produced either by a digital method, an analog method, or a mixture of the two methods. In a digital method, phase shifts are generated by digital circuits comprising counters, a divider, an adder, and a comparator. The digital circuits analyze the signal and use the necessary information to form a series of phased driving signals. In an analog method, phase shifts are generated by analog circuits comprising ramp waveform generators, comparators, and at least one shot generator. Also, an apparatus for driving a lighting system with multiple lamps can be realized by mixing the two methods mentioned above. | 10-22-2009 |
| 20090267530 | BACKLIGHT MODULE FOR DISPLAYS - A backlight module includes a light-emitting unit, and a controller to receive a first control signal and generate a second control signal to control the light-emitting unit. The controller controls a frequency of the second control signal according to a duty cycle of the first control signal. | 10-29-2009 |
| 20090289571 | ACTIVE ENCLOSURE FOR COMPUTING DEVICE - A computing device is disclosed. The computing device includes a housing having an illuminable portion. The computing device also includes a light device disposed inside the housing. The light device is configured to illuminate the illuminable portion. | 11-26-2009 |
| 20090322241 | AC DRIVEN LIGHT EMITTING DEVICE - An alternating current (AC) driven light emitting device includes a substrate, K number of first light emitting diode (LED) cells arranged in a row on a top surface of the substrate, where K is an integer satisfying K≧3, K number of second LED cells arranged in a row parallel to the row of the first LED cells on the top surface of the substrate, and (K−1) number of third LED cells arranged in a row between the respective rows of the first and second LED cells on the top surface of the substrate. The AC driven light emitting device has a connection structure between LED cells to be operable at an AC. | 12-31-2009 |
| 20100019685 | DIELECTRIC BARRIER DISCHARGE LAMP LIGHTING APPARATUS - A dielectric barrier discharge lamp lighting apparatus includes a plurality of dielectric barrier discharge lamps each of which includes an internal electrode sealed at one end, an external electrode arranged outside of a discharge space of the dielectric barrier discharge lamps, and a ballast circuit for applying a high voltage at high frequency between the internal electrode and the external electrode to operate the plurality of dielectric barrier discharge lamps. The plurality of lamps are arranged in parallel, and arranged so that the position of the internal electrode of each dielectric barrier discharge lamp is at different side in the adjacent dielectric barrier discharge lamps, and at the same sides in every other dielectric barrier discharge lamp. The ballast circuit applies voltages at high frequency with difference in phase to adjacent dielectric barrier discharge lamps. | 01-28-2010 |
| 20100039042 | Balancer Board for Backlight Device - In a balancer board for a back light device, a plurality of shunt coils configured to transfer power from an inverter to a plurality of fluorescent tubes arrayed in a line are arrayed in a line in a direction which is the same as the direction in which the fluorescent tubes are arrayed, and respective patterns formed on front and rear surfaces of the balancer board so as to supply the power from the inverter to each of the plurality of shunt coils are formed such that the pattern formed on one surface is located apart from the pattern formed on the other surface with a predetermined distance left therebetween while mutually intersecting three-dimensionally in respective planes. | 02-18-2010 |
| 20100052558 | BACKLIGHT ASSEMBLY, DRIVING METHOD THEREOF AND DISPLAY APPARATUS - Disclosed are a backlight assembly, a driving method thereof and a display apparatus. The backlight assembly includes: a light source unit which has a plurality of point light source strings; a plurality of driving elements which are connected to the plurality of point light source strings; a detector which detects currents flowing in the plurality of point light source strings; and a light source driver which generates driving pulses to drive the plurality of driving elements in a linear operating region, adjusts duty ratios of the driving pulses based on at least one of the detected currents so that the currents flowing in the plurality of point light source strings are within a range. | 03-04-2010 |
| 20100072911 | Control Circuit For Adjusting Backlight - A control circuit for adjusting a backlight color is provided. In accordance with a preferred embodiment, the control circuit comprises an input device, a control unit, a backlight, and a plurality of pulse-width modulation units. The input device receives a plurality of external messages to generate a corresponding plurality of control signals. The control unit has a plurality of pins, implements a plurality of calculations based on the plurality of control signals, and generates a plurality of light-adjusting signals, each of which has a respective pulse width. The backlight has a plurality of light sources for a color mixing. Each of the pulse-width modulation units is correspondingly coupled to each of the pins and to each of the light sources, and adjusts a light of the each light source based on the respective pulse width. | 03-25-2010 |
| 20100102743 | FLEXIBLE LED LIGHTING FILM - A lighting unit having a substrate, a light source coupled to the substrate, the light source being configured to generate light. The lighting unit further includes an optical layer positioned over the light source and arranged relative to the substrate to define a region between a top side of the substrate and a bottom side of the optical layer, and a light reflector coupled to the optical layer. The light reflector being structured to reflect at least a portion of the light generated by the light source toward the top side of the substrate, and further structured to define a plurality of light transmissive regions which individually permit transmission of at least a portion of the light generated by the light source. | 04-29-2010 |
| 20100117550 | Illumination Apparatus - An illumination apparatus can include an adapter that converts alternating power into driving power, and controls one or more of the color, brightness, chroma, and blinking of a light emitting device; and a light emitting device illumination part detachably and electrically connected to the adapter, containing one or more light emitting devices configured to emit light in accordance with the driving power and control. | 05-13-2010 |
| 20100127632 | METHOD, APPARATUS AND COMPUTER-READABLE MEDIA FOR CONTROLLING LIGHTING DEVICES - The present invention is directed to method, system and computer-readable media for controlling lighting devices. In some embodiments, a method for controlling pulse width modulated lighting devices within a lighting apparatus comprising a plurality of sets of lighting devices is disclosed. The method includes setting a counter for a first set of the plurality of sets of lighting devices using a master counter and an activation duration for one or more other sets of the plurality of sets of lighting devices. The method further includes determining an activation time period within a duty cycle for the first set of lighting devices using the counter for the first set of lighting devices and an activation duration for the first set of lighting devices. In some embodiments of the present invention, the lighting devices are light emitting diodes grouped into sets (or banks) and controlled to limit the magnitude and/or quantity of instantaneous current fluctuations in a power supply within the lighting apparatus. | 05-27-2010 |
| 20100134035 | FLUORESCENT DIMMING BALLAST WITH IMPROVED EFFIECIENCY - Dimming ballasts and methods are presented for powering a plurality of fluorescent lamps in which at most one of the lamps is selectively dimmed while all the remaining lamps are turned on or off according to a dimming level setpoint to allow dimming to match a user's desired lighting level while maintaining high efficiency. | 06-03-2010 |
| 20100148688 | LAMP MODULE AND LIGHTING DEVICE COMPRISING SUCH A LAMP MODULE - The present invention relates to a lamp module ( | 06-17-2010 |
| 20100148689 | SYSTEMS AND METHODS FOR CALIBRATING LIGHT OUTPUT BY LIGHT-EMITTING DIODES - A system and method for calibrating light output from an LED is provided. The system includes a support on which an LED is positioned, a photosensor to measure the light output from the LED, and means for calibrating and adjusting the light output of the LED. Calibration is accomplished by measuring the light output from the LED, comparing such output against a reference value, and adjusting the measured output against the reference value. | 06-17-2010 |
| 20100171437 | LIGHT OUTPUT DEVICE - A light output device comprises a substrate arrangement with a plurality of light source device arrangements integrated into the structure of the substrate arrangement. The plurality of light source device arrangements comprise at least first and second light source devices ( | 07-08-2010 |
| 20100213861 | Light Emitting Device, Lighting System, Backlight Unit for Display Device and Display Device - To enhance emission efficiency and color rendering, a light emitting device | 08-26-2010 |
| 20100225241 | ILLUMINATION DEVICE AND METHOD FOR CONTROLLING A COLOR TEMPERATURE OF IRRADIATED LIGHT - An illumination device is provided for controlling a color temperature of light irradiated from a light source having a plurality of light-emitting elements of different light colors. A control setting module provides a control signal associated with a desired color temperature for the irradiated light. A light quantity determination circuit determines light quantities for each of the light-emitting elements based on a relationship between the control signal from the control setting module and an inverse color temperature. A plurality of driver circuits provide driver signals to the light-emitting elements corresponding to the determined light quantities. In this manner the color temperature for light irradiated from the light source coincides with the desired color temperature. | 09-09-2010 |
| 20100231135 | Reconfigurable LED Array and Use in Lighting System - A light-emitting device capable of being powered by an AC power supply or an unregulated DC power supply is disclosed. The light-emitting device, in an aspect, is coupled to a controller, a light-emitting diode (“LED”) array, and a power supply, wherein the power supply can be an AC power source or an unregulated DC power source. While the power supply provides electrical power, the controller generates various LED control signals in response to power fluctuation of the electrical power. The LED array allows at least a portion of LEDs to be activated in accordance with the logic states of the LED control signals. | 09-16-2010 |
| 20100244723 | DRIVER SYSTEM AND METHOD FOR MULTIPLE COLD-CATHODE FLUORESCENT LAMPS AND/OR EXTERNAL-ELECTRODE FLUORESCENT LAMPS - Driver system and method for multiple cold-cathode fluorescent lamps and/or external-electrode fluorescent lamps. According to an embodiment, the present invention provides a system for driving a plurality of cold-cathode fluorescent lamps. The system includes a subsystem configured to receive at least a DC voltage and generate a first AC voltage in response to at least the DC voltage. The system also includes a power converter configured to receive the first AC voltage and convert the first AC voltage to at least a second AC voltage. The system further includes a plurality of current balancing devices. Each of the plurality of current balancing devices is configured to receive two currents and balance the two currents. The plurality of current balancing devices includes at least a first current balancing device, a second current balancing device, and a third current balancing device. In addition, the system includes a plurality of lamp pairs. | 09-30-2010 |
| 20100259182 | LIGHT SOURCE INTENSITY CONTROL SYSTEM AND METHOD - The light source comprises one or more first light-emitting elements for generating light having a first wavelength range and one or more second light-emitting elements for generating light having a second wavelength range. The first light-emitting elements and second light-emitting elements are responsive to separate control signals provided thereto. A control system receives a signal representative of the operating temperature from one or more sensing devices and determines first and second control signals based on the desired colour of light and the operating temperature. The light emitted by the first and second light-emitting elements as a result of the received first and second control signals can be blended to substantially obtain the desired colour of light. The desired colour of light generated can thus be substantially independent of junction temperature induced changes in the operating characteristics of the light-emitting elements. | 10-14-2010 |
| 20100264840 | FLASHLIGHT FOR ALARM SYSTEMS - A flashlight for alarm systems includes a light source containing at least one light emitting diode and a circuit which controls said light source. The circuit has a feed supply, a current converter, and flash control device. The current converter, the light source, and the flash control device are connected in series. The current converter includes a control unit, an inductor, an induction stop, and a resistor which are connected in series. The flash control device includes at least one switch for actuating the light source and a microprocessor for controlling the at least one switch. | 10-21-2010 |
| 20100277087 | LIGHT SOURCE APPARATUS - The light source apparatus is provided with a plurality of light source device disposed in the form of a ring and that emit illumination light toward the central axis of the ring by being lit in a sequential pulsed fashion; a light-guide portion having a light entrance surface rotatably disposed on the central axis and on which the illumination light emitted from the light source devices is incident, and a reflecting surface that reflects the incident illumination light in the direction along the central axis; and a driving device that controls a pulsed-lighting phase range. The driving device controls the pulsed-lighting phase range (W) such that, when the pulsed-lighting phase range (W) is shorter than a maximum-pulse phase range (M), a preceding light-out phase range (F) and a succeeding light-out phase range (R) are provided before and after the pulsed-lighting phase range (W) in the maximum-pulse phase range (M). | 11-04-2010 |
| 20100283401 | System and Method for a Solid State Lighting Network Using a Power System Architecture - A system and method for a solid state lighting network using a power system architecture, having application in a designated area to achieve energy saving control and intelligent management requirements. The present invention primarily enables implementing single or integral control of each LED light emitting device installed within a local area via a control device. The entire system is constructed using existing alternating current power lines, and the control method uses the existing power lines as channels for conveying electronic signals, and implements conversion of control signals. Moreover, alternating current carrier waves are used to complete transmission of the electronic signals, thereby achieving effective control of each LED light emitting device within a local area. | 11-11-2010 |
| 20100289424 | Methods and Circuits for LED Drivers and for PWM Dimming Controls - The present invention relates to methods for LED driver applications, comprising the steps: providing an input voltage, V | 11-18-2010 |
| 20100289425 | BACKLIGHT DRIVING SYSTEM UTILIZING ONE PWM CONTROLLER TO CONTROL TWO BACKLIGHT UNITS SEPARATELY - A backlight driving system comprises a first inverter circuit, a second inverter circuit, a pulse width modulation (PWM) controller, a frequency regulator and a switch circuit. The pulse width modulation (PWM) controller generates an illumination signal to control the first and second inverter circuits to illuminate first and second backlight units in response to a first enable signal, and generates a maintaining signal to control the first and second inverter circuits to maintain stable lighting of the first and second backlight units in response to a first feedback signal. The frequency regulator controls the PWM controller to generate the illumination signal and the maintaining signal in response to a second enable signal and a second feedback signal, respectively. The switch circuit connects the PWM controller to the second inverter circuit in response to the second enable signal. | 11-18-2010 |
| 20100289426 | ILLUMINATION DEVICE - The light source portion is provided with a plurality of LED circuits having a plurality of LEDs. A plurality of drive circuits are provided which cause the LEDs to be lit per LED circuit in response to input of PWM signals. The PWM control circuit outputs PWM signals per drive circuit in response to input of lighting control signals and simultaneously make the output timings of the PWM signals different from each other per drive circuit. By making the output timings of the PWM signals different, the period of time during which the LEDs are turned off can be reduced as the entirety of the light source portion, and the occurrence of flickering is reduced without increasing the lighting frequency. | 11-18-2010 |
| 20100301764 | LED Controller with Phase-Shift Dimming Function and LED Phase-Shift Dimming Circuit and Method Thereof - The present invention discloses an LED controller with phase-shift dimming function and an LED Phase-Shift dimming circuit and method thereof. The LED controller includes: a power circuit for supplying DC power to multiple LED channels; and an LED phase-shift dimming circuit for receiving a pulse width modulation (PWM) input signal and generating multiple phase-shifted PWM signals with a shifted phase between one another, wherein a turn-ON timing of each of the multiple phase-shifted PWM signals follows a turn-OFF timing of a previous PWM signal which is the input PWM signal or a previous one of the multiple phase-shifted PWM signals. | 12-02-2010 |
| 20100320927 | Power Reforming Methods and Associated Multiphase Lights - The present invention relates to power reforming methods and associated multiphase lights, especially to power reforming methods and associated multiple lights that selectively turn ON and OFF to reform current to follow voltage appropriately, which provides better heat dissipation, improving power factor and color mixing capability. The method comprises acts of rectifying an AC voltage to a pulsating DC voltage, synchronizing an internal time base signal to the pulsating DC voltage, setting pulse duration in a pulse period and turning ON and OFF of an electronic device. The device comprises at least two loads, a rectifier, at least two drivers and a controller. | 12-23-2010 |
| 20100320928 | WHITE LIGHT EMITTING APPARATUS AND LINE ILLUMINATOR USING THE SAME IN IMAGE READING APPARATUS - A white light emitting apparatus includes a light source section in which a first white LED that emits white light whose chromaticity deviates to a blue side from a predetermined white region of a CIE chromaticity diagram and a second white LED that emits white light whose chromaticity deviates to a yellow side from the predetermined white region are adjacently disposed so as to emit light with optical axes in substantially the same direction, and a current regulator that independently drives the blue LED chip in the first and second white LEDs, respectively. A color mixture of lights emitted from the first and second white LEDs is adjusted to a chromaticity of the predetermined white region using the current regulator. | 12-23-2010 |
| 20100327763 | BALLAST WITH END-OF-LIFE PROTECTION FOR ONE OR MORE LAMPS - Ballasts are presented with improved end-of-life (EOL) detection of lamp DC voltage components and protection circuits to facilitate user maintenance and extend lamp life using selective dimming with preheating when EOL conditions are detected. | 12-30-2010 |
| 20100327764 | Intelligent illumination device - Intelligent illumination device are disclosed that use components in an LED light to perform one or more of a wide variety of desirable lighting functions for very low cost. The LEDs that produce light can be periodically turned off momentarily, for example, for a duration that the human eye cannot perceive, in order for the light to receive commands optically. The optically transmitted commands can be sent to the light, for example, using a remove control device. The illumination device can use the LEDs that are currently off to receive the data and then configure the light accordingly, or to measure light. Such light can be ambient light for a photosensor function, or light from other LEDs in the illumination device to adjust the color mix. | 12-30-2010 |
| 20110006699 | FLUORESCENT BALLAST WITH INHERENT END-OF-LIFE PROTECTION - A ballast with end-of-life (“EOL”) protection is presented in which the voltage across a lamp at EOL is controlled to prevent the lamp from overheating, while the voltage across the lamps not at EOL is maintained to allow normal operation of those lamps, and when a new lamp is added to the ballast, the AC voltage across all lamps is controlled to allow ignition of the newly added lamp without cycling the power of the ballast. | 01-13-2011 |
| 20110012527 | SYNCHRONOUS OPERATION SYSTEM FOR DISCHARGE LAMP LIGHTING APPARATUSES, DISCHARGE LAMP LIGHTING APPARATUS, AND SEMICONDUCTOR INTEGRATED CIRCUIT THEREOF - Each of discharge lamp lighting apparatus that are connected to a common line includes a sawtooth-wave oscillator to generate a sawtooth signal for PWM-controlling a plurality of switching elements passing a current through a primary winding of a transformer and a capacitor of a resonant circuit connected to a discharge lamp, a PWM comparator controlling the plurality of switching elements according to the sawtooth signal, and a pulse synchronization circuit providing the common line with a synchronization pulse signal based on a pulse signal in relation to the sawtooth signal, and when receiving a synchronization pulse signal from the common line, synchronize the oscillation frequency of the sawtooth signal with the frequency of the synchronization pulse signal from the common line. So that a voltage of aligned frequency and phase is applied to one end of each discharge lamp. | 01-20-2011 |
| 20110018457 | AC LED device for eliminating harmonic current - An AC LED device for eliminating harmonic current comprises: a first AC-LED group, a second AC-LED group, and a resistor. The first AC LED group and the second AC LED group are connected in parallel to the resistor, and the resistor is further connected to an AC power supply terminal. Each of the first AC LED group and the second AC LED group has a forward on voltage such that the AC LED device has an overall forward on voltage that is lower than a voltage of the AC power supply terminal and also lower than a forward on voltage of the first AC LED group and the second AC-LED group connected in series. Therefore, harmonic current can be effectively eliminated in LED optical mask design, semiconductor manufacturing process or packaging process. | 01-27-2011 |
| 20110031891 | LIGHT EMITTING DEVICE FOR AC POWER OPERATION - Disclosed is an improved light-emitting device for an AC power operation. A conventional light emitting device employs an AC light-emitting diode having arrays of light emitting cells connected in reverse parallel. The arrays in the prior art alternately repeat on/off in response to a phase change of an AC power source, resulting in short light emission time during a ½ cycle and the occurrence of a flicker effect. An AC light-emitting device according to the present invention employs a variety of means by which light emission time is prolonged during a ½ cycle in response to a phase change of an AC power source and a flicker effect can be reduced. For example, the means may be switching blocks respectively connected to nodes between the light emitting cells, switching blocks connected to a plurality of arrays, or a delay phosphor. Further, there is provided an AC light-emitting device, wherein a plurality of arrays having the different numbers of light emitting cells are employed to increase light emission time and to reduce a flicker effect. | 02-10-2011 |
| 20110043124 | METHODS AND APPARATUS FOR ENCODING INFORMATION ON AN A.C. LINE VOLTAGE - An AC line voltage may be encoded with control information, such as dimming information derived from an output signal of a conventional dimmer, so as to provide an encoded AC power signal. One or more lighting units, including LED-based lighting units, may be both provided with operating power and controlled (e.g., dimmed) based on the encoded power signal. In one implementation, information may be encoded on the AC line voltage by inverting some half cycles of the AC line voltage to generate an encoded AC power signal, with the ratio of positive half-cycles to negative half-cycles representing the encoded information. In other aspects, the encoded information may relate to one or more parameters of the light generated by the LED-based lighting unit(s) (e.g., intensity, color, color temperature, etc.). | 02-24-2011 |
| 20110050113 | Illumination System Comprising A Light Source And A Control Unit And An Illumination Control System For Controlling A Light Source By Multiple User Interface Surfaces - An Illumination system comprising a light source ( | 03-03-2011 |
| 20110062878 | BALLAST WITH LAMP FILAMENT DETECTION - A ballast ( | 03-17-2011 |
| 20110062879 | BALLAST WITH LAMP-DIAGNOSTIC FILAMENT HEATING, AND METHOD THEREFOR - A ballast ( | 03-17-2011 |
| 20110074303 | ILLUMINATION APPARATUS IMPLEMENTING NON-LETHAL WEAPON - A weapon accessory integrates multiple illumination sources and a mechanism for dispensing a chemical irritant within a single housing for attachment as a fore grip to a firearm. The weapon accessory has selectable microprocessor-controlled multi-modes of operation for providing illumination, sighting or target debilitation. Switches on the outside of the housing enable user setting and control of the multiple modes of operation, which include one or a combination of (i) activating high intensity light emitting diodes (LEDs) to illuminate an object or human subject with either visible or infrared light, (ii) activating a visible or infrared laser for sighting a target, (iii) activating a frequency modulation mode that alternates pulsing white and blue LEDs at three superimposed frequencies to temporarily disable, distract and degrade the vision of a human subject, and (iv) activating the chemical irritant dispenser. | 03-31-2011 |
| 20110074304 | WIRELESSLY SUPPLIED ILLUMINATION MEANS - An illuminator may include at least one receiver configured to wirelessly tapping off power from an alternating field; and at least one light source which is connected to the receiver, wherein the illuminator has a flat adhesive surface which is magnetic or can be magnetized. | 03-31-2011 |
| 20110080105 | VARIABLE LIGHT CONTROL SYSTEM AND METHOD USING MOMENTARY CIRCUIT INTERRUPT - An electronic circuit designed to reduce energy consumption by toggling between a plurality of conventional or electronic fluorescent lighting ballasts within a given fixture, and where said toggle circuit shall increase or decrease fixture light output levels according to immediate requirements. Toggle circuit may be remotely controlled from conventional Mains wall switch or other such means. Initial applications of Mains power automatically provides the minimum of light levels. Additional momentary interruptions to Mains power provides varied and/or additional lighting levels. | 04-07-2011 |
| 20110080106 | Turning off muliple fluorescent lamps simultaneously using RF-enabled lamp starter units - A multi-lamp fluorescent light fixture includes a plurality of replaceable fluorescent lamp starter units. Each starter unit has a built-in microcontroller, an RF (Radio-Frequency) receiver, and communicates wirelessly with a master unit. Each starter unit can be wirelessly controlled to turn off coupled fluorescent lamps. Each starter unit receives a turn off command, monitors the AC voltage supplied to coupled lamps, and initiates turn off when the AC voltage reaches a threshold voltage stored in a memory of the microcontroller. In one novel aspect, each threshold voltage is selected such that turn off of lamps coupled to each starter is initiated within one millisecond. Systems of existing light fixtures are retrofitted with such wireless starter units, and thereby made controllable by a master unit so that the master unit can turn off the lights if room occupancy is not detected or if sufficient ambient light is available. | 04-07-2011 |
| 20110080107 | Dimming a multi-lamp fluorescent light fixture by turning off an individual lamp using a wireless fluorescent lamp starter - A multi-lamp fluorescent light fixture includes a plurality of replaceable fluorescent lamp starter units. Each starter unit has a built-in microcontroller, an RF (Radio-Frequency) receiver, and communicates wirelessly with a master unit. The plurality of starter units can be wirelessly controlled to dim the multi-lamp fixture. Each starter unit receives a DIM command. Each starter unit identified as a dimmer starter unit responds to the DIM command by turning off coupled fluorescent lamps. Starter units not identified as dimmer starter units respond by leaving coupled lamps turned on, or alternatively, turning off and quickly restarting coupled lamps. Systems of existing light fixtures are retrofitted with such wireless starter units, and thereby made controllable by a master unit so that the master unit can dim the lights if room occupancy is not detected or if sufficient ambient light is available. | 04-07-2011 |
| 20110080108 | Color tunable light emitting diode - A color tunable light emitting diode is disclosed in the present invention. At least two light emitting chip groups each has a number of light emitting chips mixed with at least one phosphor to produce light with a specific correlated color temperature. By supplying tunable currents to the light emitting chip groups, properly arranging the light emitting chips and providing a suitable substrate, the color tunable light emitting diode can be achieved. The present invention provides a simple and workable method to manufacture tunable light emitting diodes which fulfill the requirement of compact design of modern electronic products. | 04-07-2011 |
| 20110084621 | LIGHT-EMITTING ADJUSTMENT METHOD AND DISPLAY DEVICE - A light-emitting adjustment method and a display device are provided. The display device includes a voltage source, a light-emitting diode array, a pulse width modulator, a current sensor and a light-emitting adjuster. The voltage source provides an operating voltage. The pulse width modulator provides operating pulse signals to multiple light-emitting diodes arranged in column in order. The current sensor senses a plurality of overall current values of the light-emitting diodes at different timings during the light-emitting diodes are sequentially enabled. The light-emitting adjuster computes an operating current value of each of the light-emitting diodes according to the overall current values and performs a compensation operation based on the operating current value to obtain and output a compensation signal. | 04-14-2011 |
| 20110084622 | DIMMER DECODER WITH LOW DUTY CYCLE HANDLING FOR USE WITH LED DRIVERS - A method includes receiving a sense signal having multiple pulses, where the sense signal is based on an output of a dimmer. The method also includes, for each of multiple sampling periods, (i) identifying a pulse duty cycle by sampling at least one pulse in the sense signal and calculating a duty cycle of the at least one pulse and (ii) generating an output value identifying a duty cycle for driving one or more LEDs. The output value is based on the pulse duty cycle. The method further includes generating a holding current for the dimmer (i) during the sampling of the at least one pulse in at least one of the sampling periods and (ii) when the pulse duty cycle is less than a specified threshold. The holding current can be applied continuously when the pulse duty cycle is less than the specified threshold (such as 15%). | 04-14-2011 |
| 20110084623 | Dimmer decoder with adjustable filter for use with led drivers - A method includes receiving a sense signal having multiple pulses, where the sense signal is based on an output of a dimmer. The method also includes, for each of multiple sampling periods, (i) identifying at least one pulse duty cycle for at least one pulse in the sense signal during that sampling period and (ii) generating an output value identifying a duty cycle for driving one or more light emitting diodes (LEDs). The output value is based on the at least one pulse duty cycle. The method further includes filtering the output values using a filter and adjusting the filter based on a rate at which the output of the dimmer changes. The filter could be adjusted by controlling whether an additional resistor forms part of an RC filter based on a sampling state. | 04-14-2011 |
| 20110084624 | LIGHT EMITTING DEVICE ADAPTED FOR AC DRIVE - A light emitting device comprising a first common electrode ( | 04-14-2011 |
| 20110089849 | DISPLAY APPARATUS AND BACKLIGHT UNIT FOR CONTROLLING PLURALITY OF LAMPS, AND DISPLAY DRIVING METHOD - A display apparatus and a backlight unit which control a plurality of lamps, and a display driving method are provided. The display apparatus includes a display, and a backlight unit which provides a backlight to the display. The backlight includes a plurality of lamps, and a lamp driver which adjusts a frequency of power supplied to the plurality of lamps until all of the plurality of lamps enter a running mode. | 04-21-2011 |
| 20110089850 | LIGHT EMITTING DEVICE AND MANUFACTURING METHOD THEREFOR - In a light emitting device, a P-type first region ( | 04-21-2011 |
| 20110089851 | SOLID STATE LIGHTING APPARATUS - A lighting apparatus includes a solid state lamp including one or more solid state lighting elements, and a power circuit including a current limiting device electrically connected to the lamp. The current limiting device configured to impose a maximum threshold on the current delivered to the lamp, wherein the current limiting device functions as essentially a constant current source. The lighting apparatus includes a housing for the power circuit and lamp, as a module unit. | 04-21-2011 |
| 20110089852 | Addressable LED Light String - An addressable light strand having a controller and a plurality of light modules, with a further plurality of lights. The control module includes a rectifier configured to provide the power output; and a control circuit configured to provide a data output. The plurality of light modules are connected in series. Each of the plural light modules has a zener diode that has an anode and a cathode, the anode is coupled to the power output of the control module and the cathode is coupled to an anode of a next serially connected light module. The light module also includes a semiconductor device having at least a power connection and a ground connection. The power connection is connected to the cathode of the zener diode and the ground connection is coupled to the anode of the zener diode. | 04-21-2011 |
| 20110101880 | Driver circuit with an increased power factor - According to one exemplary embodiment, driver circuit coupled between an AC line and a load includes a first semiconductor switch interposed between a bus voltage and a resonant circuit and a second semiconductor switch interposed between the resonant circuit and a ground, where the resonant circuit drives the load. In the driver circuit, the bus voltage has a shape substantially corresponding to a shape of a rectified AC line voltage, thereby increasing a power factor of the driver circuit. The driver circuit can further include a full-bridge rectifier disposed between the resonant circuit and the load. The load can include at least one LED. | 05-05-2011 |
| 20110101881 | LIGHT EMITTING APPARATUS, METHOD FOR DRIVING THE LIGHT EMITTING APPARATUS, AND DISPLAY APPARATUS INCLUDING THE LIGHT EMITTING APPARATUS - A light emitting apparatus comprises a light emitting section for emitting light, a color of the light being changed with a value of a driving current, and a driving section for driving the light emitting section so that the light emitting section emits light having a desired color and a desired intensity, by generating the driving current based on a signal designating the desired color and a signal designating the desired intensity and by applying the driving current to the light emitting section. | 05-05-2011 |
| 20110109238 | Digital dimming device and digital dimming method - The present invention discloses a digital dimming device and a digital dimming method, for controlling a plurality of light emitting device channels. The method comprises: generating a corresponding plurality of driving signals to control the plurality of light emitting device channels; receiving a PWM input signal having a duty ratio, and phase shifting the PWM input signal to generate multiple PWM output signals with about the same duty ratio as the PWM input signal, but with respectively shifted phases; and enabling or disabling corresponding driving signals by the multiple PWM output signals, respectively. | 05-12-2011 |
| 20110109239 | ILLUMINATION CONTROL DEVICE - A lighting control device | 05-12-2011 |
| 20110115394 | System and Method for Regulation of Solid State Lighting - Exemplary embodiments of the invention provide a system, apparatus, and method of controlling an intensity and spectrum of light emitted from a solid state lighting system. The solid state lighting has a first emitted spectrum at full intensity and at a selected temperature, with a first electrical biasing for the solid state lighting producing a first wavelength shift, and a second electrical biasing for the solid state lighting producing a second, opposing wavelength shift. Exemplary embodiments provide for receiving information designating a selected intensity level or a selected temperature; and providing a combined first electrical biasing and second electrical biasing to the solid state lighting to generate emitted light having the selected intensity level and having a second emitted spectrum within a predetermined variance of the first emitted spectrum over a predetermined range of temperatures. | 05-19-2011 |
| 20110115395 | DIMMER DECODER WITH IMPROVED EFFICIENCY FOR USE WITH LED DRIVERS - A method includes receiving a sense signal having multiple pulses, where the sense signal is based on an output of a dimmer. The method also includes, for each of multiple sampling periods, sampling a subset of the pulses in the sense signal during that sampling period. The method further includes generating a holding current for the dimmer during the sampling of the subset of pulses in at least one of the sampling periods. In addition, the method includes, for each of the sampling periods, generating an output value identifying a duty cycle for driving one or more light emitting diodes (LEDs). The subset of pulses in each of the sampling periods includes multiple pulses during that sampling period but not one or more initial pulses at a beginning of that sampling period. | 05-19-2011 |
| 20110115396 | Microcontroller-optimized Pulse-width Modulation (PWM) Drive of a Light-emitting Diode (LED) - A method for operating a controlled illumination apparatus, the illumination apparatus comprising at least one pulse-width modulation (PWM)-controlled LED, the method comprising carrying out a duty cycle sweep of the PWM signal driving the LED while sensing at least one parameter indicative of the power consumption of the LED to compute a curve reflecting the duty-cycle dependency of the power efficiency of the LED. | 05-19-2011 |
| 20110115397 | Lighting Device Having Cross-Fade and Method Thereof - A lighting device includes a first lighting source, a second lighting source, and a controller. The first lighting source yields a first illumination pattern. The second lighting source yields a second illumination pattern. The patterns overlay to yield a third illumination pattern. The controller shifts available power between the first lighting source and the second lighting source. | 05-19-2011 |
| 20110140626 | ELECTRONIC DRIVER DIMMING CONTROL USING RAMPED PULSED MODULATION FOR LARGE AREA SOLID-STATE OLEDS - An electronic driver apparatus and methods are disclosed for driving power an organic LED or other large area solid state light source, in which a switch mode DC current source provides DC current to drive the light source according to a control input and a controller provides a ramped pulse modulated control input to the current source for at least some values of a dimming setpoint signal or value to mitigate damaging current spikes by controlling di/dt of the drive current. | 06-16-2011 |
| 20110140627 | APPARATUS FOR DRIVING LIGHT EMITTING DIVICE USING PULSE-WIDTH MODULATOIN - An apparatus for driving a light emitting device (LED) is provided. The apparatus for driving the LED includes a first driving control element, a first current detection unit, a first effective value detection unit, a first reference signal generation unit, and a first comparison unit. The first driving control element controls a current flowing through a first LED channel, in response to a first pulse-width modulated control signal. The first current detection unit detects the current flowing through the first LED channel. The first effective value detection unit detects an effective value of the current detected by the first current detection unit. The first reference signal generation unit generates a preset reference signal having a sawtooth waveform. The first comparison unit compares the reference signal from the first reference signal generation unit with the effective value from the first effective value detection unit. | 06-16-2011 |
| 20110156608 | LIGHT TUBE AND POWER SUPPLY CIRCUIT - The present invention provides a light tube for illumination by a power supply circuit including a bulb portion and a pair of end caps disposed at opposite ends of the bulb portion. A plurality of light emitting diodes are disposed inside the bulb portion and in electrical communication with the pair of end caps for illuminating in response to electrical current to be received from the power supply circuit. | 06-30-2011 |
| 20110156609 | FLUORESCENT LAMP FOR LIGHTING APPLICATIONS - A lighting device comprises a serpentine shaped CCFL, a driver driving the CCFL, a connector that allows the device to connect to and receive power from conventional power sockets, and a fixture that connects them into a single device. Such device can be used for general lighting purposes and replaces incandescent and other fluorescent lamps in current use without having to change electrical sockets. The fixture mechanically connects the CCFL, the driver and the connector to form an unitary mechanical structure. Preferably an air gap is maintained between the CCFL and the driver. | 06-30-2011 |
| 20110169417 | Reconfigurable LED Array and Use in Lighting System - A light-emitting device capable of being powered by an AC power supply or an unregulated DC power supply is disclosed. The light-emitting device, in an aspect, is coupled to a controller, a light-emitting diode (“LED”) array, and a power supply, wherein the power supply can be an AC power source or an unregulated DC power source. While the power supply provides electrical power, the controller generates various LED control signals in response to power fluctuation of the electrical power. The LED array allows at least a portion of LEDs to be activated in accordance with the logic states of the LED control signals. | 07-14-2011 |
| 20110187278 | LIGHTING CONTROL METHOD - A lighting control method includes steps for electrically powering a plurality of luminaires each having a selectively powerable first light source and a selectively powerable second light source. The luminaires are powerable and controllable by a common AC power source. A control pulse signal may sent via the AC power source to cause each of the luminaires to selectively route power to either the first light source or the second light source. | 08-04-2011 |
| 20110199013 | Constant Temperature LED Driver Circuit - A constant temperature LED driver circuit for controlling the rate of lumen depreciation and therefore useful lifetime of an LED array by keeping the LEDs at a fixed temperature. A temperature sensing means, which measures the temperature of the LEDs, is coupled to a variable power source that drives the LED array. The current provided to the LED array is adjusted in response to the temperature sensing means to ensure that the LEDs remain at a constant temperature regardless of changes in ambient temperature. | 08-18-2011 |
| 20110204810 | APPARATUS, CIRCUIT AND METHOD FOR AUTOMATIC PHASE-SHIFTING PULSE WIDTH MODULATED SIGNAL GENERATION - Systems, circuits and methods for phase-shifting pulse width modulated signal generation are disclosed. In some embodiments, a phase-shifting pulse width modulation circuit is configured to output pulses based on an input pulse width modulated signal. The pulses are staggered relative to one another, and can be received by a light-emitting diode driver for driving a light-emitting diode string at one or more time periods. The phase-shifting pulse width modulation circuit can include a counter-based programmable delay subcircuit consisting of two counter-based programmable delay blocks. | 08-25-2011 |
| 20110215730 | LIGHTING CONTROL SYSTEM WITH IMPROVED EFFICIENCY - A lighting system includes a plurality of fixtures, wherein each fixture includes a plurality of fluorescent lamps. A dimming ballast is operatively coupled to each fixture, each dimming ballast receives power from an outside source that is delivered to the fluorescent lamps within each corresponding fixture. A control module communicates with each dimming ballast, the control module receives a lighting level from an outside source, determines the most power efficient lighting solution and outputs a control signal to each dimming ballast related to the light output level of each lamp within each fixture. | 09-08-2011 |
| 20110241558 | Light-Emitting Device and Driving Method Thereof - It is an object to provide a light-emitting device whose light is not entirely turned off owing to disconnection (an insulation defect) in part of light-emitting elements and the whole of which can be driven by one constant current supply without causing variation in brightness. Further, it is an object to provide a light-emitting device in which brightness can be adjusted. In addition, it is an object to provide a light-emitting device in which change in properties of light-emitting elements over time due to the use thereof is less likely to appear as variation in brightness. In order to achieve the above object, a light-emitting device in which a plurality of light-emitting panels are connected to a constant current supply controlled by a light-emission control unit may be used, and each of the light-emitting panels may be sequentially driven, independently. The plurality of light-emitting panels provided in the light-emitting device may be used evenly so that difference in total operating time is not caused among them. | 10-06-2011 |
| 20110241559 | INTEGRAL CONDUIT MODULAR LIGHTING - Apparatus and associated methods involve a light module adapted to mount to an open face of a conduit body. In an illustrative example, the light module may include an electrical interface for making operative electrical connection to conductors disposed within the conduit body. In some particular embodiments, the electrical interface may include an insulation displacement-style connector to facilitate installation and/or removal of the light module. In various examples, the conduit body may substantially conform to a form factor of a conduit body for a conventional conduit system. | 10-06-2011 |
| 20110248641 | LIGHTING APPARATUS USING WHITE-LIGHT LEDS - Disclosed herein is a lighting apparatus using white-light Light-Emitting Diodes (LEDs). The lighting apparatus includes white-light LEDs, first LEDs, second LEDs, a substrate, a driving unit, and wires. The white-light LEDs emit light having a first peak value in a wavelength range of about 440 to 460 nm and a second peak value in a wavelength range of about 520 to 600 nm as a main light source. The first LEDs emit light having a third peak value in a wavelength range of about 610 to 625 nm as an auxiliary light source. The second LEDs emit light having a fourth peak value in a wavelength range of about 492 to 500 nm as an auxiliary light source. The substrate allows the LEDs to be disposed thereon. The driving unit drives the LEDs. The wires connect the substrate to the driving unit. | 10-13-2011 |
| 20110248642 | LIGHT EMITTING DEVICE CONTROL CIRCUIT DEVICE AND CONTROL METHOD OF THE CONTROL CIRCUIT DEVICE - The light emitting device control circuit device | 10-13-2011 |
| 20110254459 | COLOR PROJECTION LAMP - A lamp that produces an infinitely variable range of time, space, and color patterns. The lamp includes a plurality of colored light sources that produce light in at least two different visual spectrums, a single modulation device that generates a modulation scheme for each of the plurality of light sources, a display screen, and a mask that masks off at least a portion of light illuminating the display screen. The generated modulation scheme is produced at a predefined intensity level. A controller selectively alters delivery of the modulation scheme to each of the plurality of light sources. A first switch allows a user to select one of a plurality of modulation schemes. A second switch allows a user to alter the predefined intensity level. A third switch allows a user to select one of a plurality of modulation rates. | 10-20-2011 |
| 20110273107 | SOLID-STATE LIGHTING OF A WHITE LIGHT WITH TUNABLE COLOR TEMPERATURES - A light-emitting diode (LED)-based solid-state device comprises a color mixing mechanism to dynamically change the correlated color temperature (CCT) of a white light. With different lumen proportions for white phosphor-coated LEDs and integrated red and green LEDs, the light mixtures can be located in any one of eight CCT quadrangles. In practice, CCTs of a white-light can be tuned in a continuous manner. Because all the possible light mixtures on the chromaticity diagram correspond to a line segment that overlays the Planckian locus within the eight CCT tolerance quadrangles, the effect of LED intensity fluctuations that may put the mixture out of white light region is reduced. Also, because the two additional LEDs that mix with the white phosphor-coated LEDs contribute to the overall spectral power distribution (SPD) that substantially matches the SPD of standard illuminants, a CRI of 80 can be reached. | 11-10-2011 |
| 20110273108 | DATA CABLE POWERED LIGHT FIXTURE - A light fixture can be affixed within a wall and powered using the same cable along which data signals are transmitted. The LED lights in the light fixture are sufficiently bright to be used for illumination and are powered by a voltage derived from power delivered via the data cable. The light fixture may be used in conjunction with a building automation system. The light provided by the LED lights may be modified based on control signals received via the data cable. Modifications may include changes to the perceived brightness and/or color of the light. | 11-10-2011 |
| 20110279053 | VARIABLE VOLTAGE CONTROL APPARATUS AND LIGHTING APPARATUS INCORPORATING CONTROL APPARATUS - Control apparatus for controlling an aspect of an apparatus are disclosed. In certain embodiments, the control apparatus comprises a dimmer that includes a variable impedance. In certain embodiments of the invention, the dimmer may be a TRIAC dimmer having a voltage at a gate electrode of the TRIAC that is always below a trigger voltage for the TRIAC such that the TRIAC never turns on and the remaining components within the TRIAC dimmer can be used as discreet components in a larger circuit. In the control apparatus, the dimmer may be coupled to a signal generation circuit that may generate an output signal whose frequency (period) is dictated at least in part by an impedance of the variable impedance. The output signal may be used to control an aspect of an apparatus such as the intensity, color or color temperature for a lighting apparatus. | 11-17-2011 |
| 20110285307 | LED LIGHTING APPARATUS - An LED lighting apparatus includes a triac dimmer | 11-24-2011 |
| 20110298387 | LIGHT EMITTING DEVICE, LIGHTING SYSTEM, BACKLIGHT UNIT FOR DISPLAY DEVICE AND DISPLAY DEVICE - To enhance emission efficiency and color rendering, a light emitting device | 12-08-2011 |
| 20110304276 | Current Sensing for LED Drivers - Embodiments of the present invention provide a system and method for determining a magnitude of current driving LEDs by sensing a current through a switching transistor and extracting the information of the LED current based on a relationship between the current through the switching transistor and the current driving the LEDs. | 12-15-2011 |
| 20110309765 | LED DISPLAY DEVICE PROVIDING CURRENT CORRECTION AND CORRECTION METHOD THEREOF - An LED display device providing current correction includes a number of LED modules, a microprocessor, and a storage unit storing a standard voltage value. The correction sequence begins with each of the plurality of LED modules entering a work state in sequence, outputting a feedback voltage indicating work current of one of the LED modules to the microprocessor in sequence, comparing the feedback voltage with the standard voltage, adjusting the current of the LED module if the feedback voltage does not equal the standard voltage. | 12-22-2011 |
| 20110316439 | LIGHT EMITTING DEVICE - A light emitting device includes a first power node and a second power node configured to receive single-phase voltage provided from an AC voltage source, a first light emitting unit including at least one light emitting diode (LED), wherein a first end of the first light emitting unit is coupled to the first power node, a second light emitting unit including at least one LED, wherein a first end of the second light emitting unit is coupled to the first power node, and a second end of the second light emitting unit couples to the second power node, and a first phase modulator coupled between a second end of the first light emitting unit and the second power node and configured to change the phase of the single-phase voltage provided to the first light emitting unit. | 12-29-2011 |
| 20120025732 | LIGHT EMITTING DEVICE AND METHOD FOR DRIVING THE SAME - A light emitting device contains organic EL elements of different colors and outputs light emitted from the organic EL elements, in which, when outputting white light, the organic EL element, in which the luminance when light is emitted at a current density at which a luminous efficiency reaches a maximum is lower than that of the organic EL elements of the other colors, among the organic EL elements of different colors emits light with a current having a current density higher than the current density at which the luminous efficiency reaches the maximum and a highest duty among the organic EL elements of different colors, and the organic EL elements of the remaining colors emit light with a current having the current density at which the luminous efficiency reaches the maximum and at a duty lower than the duty. | 02-02-2012 |
| 20120032607 | Method of Arranging Light Emitting Diodes Supplied by AC Power with Low Loss and Smooth Illumination in a High Expandable Structure - A method of arranging light emitting diodes (LEDs) supplied by AC power with low loss and smooth illumination in a high expandable structure is disclosed. The method includes the steps of: building up a virtual grid having M virtual lateral lines and N virtual vertical lines, which form multiple virtual intersection nodes at the intersections; disposing N−1 lateral LEDs in each virtual lateral line with one lateral LED placed between two adjacent virtual intersection nodes, connecting the positive terminal of one lateral LED to the positive terminal of one of the two adjacent lateral LEDs, and connecting the negative terminal of the one lateral LED to the negative terminal of the other adjacent lateral LED; disposing M−1 vertical LEDs in each virtual vertical line except the first and last virtual vertical lines with one vertical LED placed between two adjacent virtual intersection nodes, connecting the positive terminal of one vertical LED to the positive terminal of one of the two adjacent vertical LEDs, and connecting the negative terminal of the one vertical LED to the negative terminal of the other adjacent vertical LED; and connecting the AC power to the first and last virtual vertical lines. All vertical LEDs are turned on by the AC power and about one half of the lateral LEDs are turned on and the other half off during the positive phase of the AC power, and alternatively, the about one half of the lateral LEDs are turned off and the other half on during the negative phase of the AC power. Therefore, the vertical LEDs are always turned on and the lateral LEDs are alternatively turned on and off. | 02-09-2012 |
| 20120038286 | DRIVE CIRCUIT FOR A COLOR TEMPERATURE TUNABLE LED LIGHT SOURCE - A drive circuit for a color temperature tunable LED light source. An apparatus includes a current driver configured to output a first drive current to drive a first group of LED chips of the light source to emit first color temperature light and to output a second drive current to drive a second group of LED chips of the light source to emit second color temperature light. The apparatus also includes a controller coupled to the current driver and configured to control the first and second drive currents so that the first color temperature light and the second color temperature light combine to produce a resulting light having a selected color temperature and a selected intensity value. | 02-16-2012 |
| 20120038287 | LIGHTING SYSTEM, DIMMING CONTROL APPARATUS AND DIMMING CONTROL METHOD - A lighting system, a dimming control apparatus, and a dimming control method are provided. The dimming control apparatus includes a control unit and a dimming driving unit. In response to a dimming command and a number, the control unit decodes the dimming command into a plurality of sub-dimming commands. The dimming driving unit has a plurality of output terminals for coupling to a plurality of lamp modules. According to the sub-dimming commands, the control unit controls the dimming driving unit to output a plurality of dimming driving signals corresponding to the lamp modules to adjust the brightness of each lamp module individually. | 02-16-2012 |
| 20120081025 | Power Conversion and Control Systems and Methods for Solid-State Lighting - A solid-state lighting system comprises a plurality of light-emitting devices (e.g., light-emitting diodes) and an alternating current to direct current (AC-DC) converter that converts AC power to DC power for powering the plurality of light-emitting devices. The AC-DC converter is configured to perform AC-DC conversion directly, without the need for or use of a bridge rectifier or step-down transformer. According to one aspect of the invention, the light-emitting devices of the solid-state lighting system are autonomous and individually powered by a plurality of DC power supplies generated from the DC power produced by the AC-DC converter. According to another aspect, a plurality of phase-offset dimmer control signals are generated based on waveform distortions in a dimming signal produced by a conventional dimmer switch. The phase-offset dimmer control signals are used to individually control the dimming of the light-emitting devices. | 04-05-2012 |
| 20120086353 | END-OF-LIFE CIRCUIT FOR FLUORESCENT LAMP BALLASTS - A ballast and method are presented for detecting end-of-life conditions of fluorescent lamps in which a ballast output is controlled according to a dimming input when a DC voltage or current of the lamp is in a predefined range or when the AC lamp current is below a predefined threshold, and the output is reduced to an EOL protection level when the lamp DC voltage or current is outside the predefined range and the AC lamp current is above the predefined threshold. | 04-12-2012 |
| 20120098455 | Lighting Device Having A Plurality Of Light Sources - A lighting device ( | 04-26-2012 |
| 20120133298 | POWERLINE COMMUNICATION CONTROL OF LIGHT EMITTING DIODE (LED) LIGHTING FIXTURES - A powerline communication control system for controlling a lighting unit, such as an LED lighting unit, including a master controller for receiving lighting unit control inputs from a lighting controller and generating corresponding lighting unit command outputs in a lighting system command format and transmission mode and superimposing the lighting unit command outputs onto the power distribution system and at least one lighting slave unit for receiving the lighting command signal, separating the lighting command signal from the power signal and for providing lighting unit control commands to the at least one lighting unit to control illumination thereof. | 05-31-2012 |
| 20120146535 | LED CONTROLLER ASIC AND PWM MODULE THEREOF - An LED controller application specific integrated circuit includes a host interface and a PWM module. The PWM module is configured to control a plurality of LED devices, and comprises a PWM data buffer, an arithmetic core and a plurality of PWM channels. The PWM data buffer is configured to store PWM turning-point data from the host. The arithmetic core is configured to generate PWM data according to the PWM turning-point data stored in the PWM data buffer. The plurality of PWM channels are configured to receive the PWM data, and each comprises a PWM controller and a PWM I/O interface. The PWM controller is configured to control the operation of the PWM channel. The PWM I/O interface is configured to connect to an LED device. | 06-14-2012 |
| 20120194092 | DISCHARGE LAMP WITH LONG LIFE - Methods and apparatuses for starting a discharge lamp are disclosed. In some embodiments, a lamp has an outer envelope connected at one end to a base and enclosing multiple double-ended arc tubes. Each arc tube is electrically connected at one end to an electrical lead positioned proximate the base of the lamp and at the other end to an electrical lead positioned proximate the distal end of the envelope. A voltage pulse is applied to the electrical lead positioned proximate the distal end of the envelope. Random starting of the arc tubes may thus be effected so that each arc tube is about equally likely to start, promoting uniformity of arc tube usage and long lamp life. Multiple arc tubes may be bulbous and staggered in axial displacement for space efficiency, and a diffusing shroud may improve optical characteristics. A heat barrier may facilitate fast restrikes. | 08-02-2012 |
| 20120206059 | TWO LEVEL LIGHTING BALLAST - A two level lighting ballast is provided, which includes a self-oscillating inverter circuit and a control circuit. The inverter includes an input; an output to selectively provide current to energize a lamp; a switching circuit operating at a switching frequency; a feedback transformer; and an impedance component. The feedback transformer is connected to the output, and drives the switching circuit based on the lamp current. The impedance component is connected in parallel with the feedback transformer, and is operated by the control circuit. When the control circuit enables the impedance component, the switching circuit operates in a first frequency range, and a first lamp current is provided. When the control circuit disables the impedance component, the switching circuit operates in a second frequency range, and a second lamp current is provided. The first frequency range is lower than the second, and the first lamp current is greater than the second. | 08-16-2012 |
| 20120212150 | UNDERWATER LIGHTING SYSTEM AND METHOD - A lighting system for wirelessly providing power to a lighting assembly across a wall. The lighting system may be used, for example, for powering the lighting assembly positioned on an outside portion of the wall, such as on the outside of a boat hull. An example of the lighting system includes a power transmitter with a multi-frequency generator connected to a power source and a controller. The multi-frequency generator is configured to generate an oscillating signal at a predetermined frequency according to a control signal received from the controller. The power transmitter includes a transmitting coil connected to receive the oscillating signal. A receiving coil is positioned to form an inductive coupling with the transmitting coil. A plurality of conditioning units are connected to the receiving coil to receive the oscillating signal. The plurality of conditioning units are connected to provide power to a corresponding light or set of lights. The conditioning units provide power to the corresponding lights when the selected one of the plurality of frequencies matches a resonant frequency of one of a plurality of resonant circuits formed by the receiving coil, transmitting coil, and a resonant capacitor in each of the plurality of conditioning units. | 08-23-2012 |
| 20120217891 | Lighting Apparatus Using PN Junction Light-Emitting Element - The present disclosure discloses a lighting apparatus using a PN junction light-emitting element, the apparatus including: a power transmitting substrate having a plurality of boundaries defined thereon; a plurality of PN junction light-emitting elements positioned within each boundary and divided into a plurality of groups; and a first switch provided on the power transmitting substrate, wherein the first switch goes into the ON state by a supplied AC having a first voltage to cause PN junction light-emitting elements of a first group positioned within each boundary to emit light, and the first switch is in the OFF state when PN junction light-emitting elements of a second group, which is positioned within each boundary and connected in series to the first group, emit light by a supplied AC having a second voltage higher than the first voltage. | 08-30-2012 |
| 20120217892 | LED CURRENT PWM DIMMING MODULE - An LED current PWM dimming module comprising: an input voltage regulator for regulating the constant direct current supplied by the LED driver power supply in order to maintain a fixed and stable supply voltage source to a timer-oscillator and a DC-DC buck converter; the timer-oscillator for generating a repetitive square wave electrical output to be fed to the DC-DC buck converter; and the DC-DC buck converter for producing a driving pulse-width-modulated (PWM) current output to power one or more LEDs from the repetitive square wave electrical output; wherein the timer-oscillator receives a control signal from an external dimming controller and adjusts the repetitive square wave electrical output frequency and duty cycle accordingly; and wherein the driving PWM current output frequency and duty cycle being varied in an open-loop manner. | 08-30-2012 |
| 20120242245 | Retrofit LED Lamp with Warm-White, More Particularly Flame-Like White Light - The invention relates to an LED lamp for warm white light having an LED module consisting of at least one colour-converted blue or UV LED, and at least one monochromatic LED, preferably a red LED, in the case of which the mixed spectrum produces white light with a colour temperature CCT of between 1500K and 2400K, preferably 1700K and 2100K at room temperature, and between 1800K and 2400K, preferably 2100K and 2300K at a stationary operating temperature of, for example, between 70° C. and 80° C. of the LED lamp. | 09-27-2012 |
| 20120262084 | Constant voltage dimmable LED driver - A constant voltage dimmable LED (Light Emitting Diode) driver is disclosed that is compatible with all types of dimmers, including conventional phase cut (TRIAC) dimmers, and behaves like a conventional constant voltage driver which can be connected to any size of LED load that has a matching voltage rating. The driver produces a continuous train of pulses for driving the LED load and obtains an averaged measure of the voltage at the AC input for controlling the duty cycle of the continuous train of pulses. Therefore, when the averaged measure of the voltage at the AC input is reduced by a dimmer, the duty cycle reduces, resulting in a dimmed LED. The driver can be created by adding a few components to a conventional wide input range AC-DC converter without or with very little modifications. | 10-18-2012 |
| 20120262085 | LED Circuits and Assemblies - An AC-driven LED assembly with discretely packaged LEDs being connected in an AC circuit and being sized preferably substantially 2.5 mm or less in length and width, and more preferably 2.0 mm or less; and being mounted to a substrate at a distance from the other of preferably approximately 3 mm or less, and more preferably 2.0 mm or less. | 10-18-2012 |
| 20120274230 | LED DRIVE CIRCUIT AND LED ILLUMINATION LIGHT - An LED drive circuit that is connectable to an a.c. power supply via a phase control type light adjuster and drives an LED load, including a discharge portion that consumes energy of a resonance phenomenon generated by a light adjuster capacitance component of the phase control type light adjuster and a light adjuster inductance component of the phase control type light adjuster when a current holding portion of the phase control type light adjuster is turned on. | 11-01-2012 |
| 20120280635 | AC LIGHT-EMITTING DEVICE - An alternating current (AC) light-emitting device includes a waveform generating unit and an AC light-emitting unit. The waveform generating unit is configured to receive an AC electrical signal and to generate a drive signal by adjusting one of: voltage amplitude of the AC electrical signal during one of positive and negative half-cycles of the AC electrical signal, and waveform level of the AC electrical signal. The AC light-emitting unit includes a first light-emitting component and a second light-emitting component, and the second light-emitting component emits a different wavelength light compared to that emitted by the first light-emitting component. The first and second light-emitting components are electrically coupled to the waveform generating unit to receive the drive signal, and emit light according to the drive signal. | 11-08-2012 |
| 20120286691 | Method, Apparatus, and System for Supplying Pulsed Current to a Load - Supplying pulsed current to a load involves repeatedly driving an electrical load between successive active and idle states via a regulator that includes a switched mode power supply. The regulator receives input current from a direct current power source and provides output current to at least an energy storage device in the idle states of the electrical load. The energy storage device is coupled to the load and the regulator. Output current is provided from both the regulator and the energy storage device to the electrical load in the active states of the electrical load. A storage capacity of the energy storage device is selected so that a duty cycle of the input current is greater than a duty cycle of the output current. | 11-15-2012 |
| 20120299505 | CLOCK GENERATION CIRCUIT, DISPLAY DEVICE DRIVE CIRCUIT, AND CONTROL METHOD OF CLOCK GENERATION CIRCUIT - A clock generation circuit that can reliably recover from a state in which generation of a clock is stopped even during a power-on process and a normal operation. The clock generation circuit includes a clock extraction circuit that extracts an extracted clock from an embedded signal on which a clock and data are superimposed, and a stop detection circuit that detects a stop of the extracted clock on the basis of the embedded signal and the extracted clock and outputs a reset signal that resets the clock extraction circuit to an initial state. | 11-29-2012 |
| 20120313545 | PULSE WIDTH MODULATION FAULT MODE FOR ILLUMINATING DEVICE DRIVERS - A PWM architecture of a microcontroller is disclosed that includes a fault module for regulating and detecting faults in current sensing or illuminating devices (e.g., LED strings). The fault module is part of a hardware regulation loop of LED voltage and LED current that allows the CPU to be placed in idle mode (“IDLE”) while an LED string is regulated in illumination. The microcontroller includes a PWM generator having a double channels PWM timer with a specific fault mode and an amplified comparator with a voltage reference. The architecture allows tuning of various parameters, including LED peak current, LED voltage supply, LED voltage regulation step and LED dimming value. In IDLE mode, the hardware regulation loop can regulate LED peak current and LED voltage supply without any CPU resource (microcontroller in IDLE mode). The fault module part of the hardware regulation loop can also detect and inform the CPU of: 1) an open LED; 2) a weak battery; and 3) an LED voltage that is under a target value. | 12-13-2012 |
| 20120319613 | 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. | 12-20-2012 |
| 20120326620 | 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. | 12-27-2012 |
| 20130009564 | WHITE LIGHT EMITTING APPARATUS AND LINE ILLUMINATOR USING THE SAME IN IMAGE READING APPARATUS - A white light emitting apparatus includes a light source section in which a first white LED that emits white light whose chromaticity deviates to a blue side from a predetermined white region of a CIE chromaticity diagram and a second white LED that emits white light whose chromaticity deviates to a yellow side from the predetermined white region are adjacently disposed so as to emit light with optical axes in substantially the same direction, and a current regulator that independently drives the blue LED chip in the first and second white LEDs, respectively. A color mixture of lights emitted from the first and second white LEDs is adjusted to a chromaticity of the predetermined white region using the current regulator. | 01-10-2013 |
| 20130015780 | PWM DIMMING CIRCUITAANM Gao; XinmingAACI ShenzhenAACO CNAAGP Gao; Xinming Shenzhen CN - A pulse width modulation (PWM) dimming circuit comprises a switch unit, a current generation unit, a mirror current source, a multi-path output unit, a plurality of current balance units and a plurality of LED lamp strings. The switch unit receives a PWM signal which controls the switch on or off. The current generation unit is connected with the switch unit and generates a current of a predetermined magnitude when the switch unit is on. The mirror current source is connected with the current generation unit and receives the current to generate a mirror current. The multi-path output unit is connected with the mirror current source and receives and output the mirror current in multiple paths. The current balance units are connected between the multi-path output unit and the LED lamp strings respectively. The PWM dimming circuit decreases both the difficulty and the manufacturing cost and is easy to operate. | 01-17-2013 |
| 20130020963 | Illumination Device and Light-Adjusting Method - The present invention has the object of suppressing variations of luminance and chromaticity among a plurality of organic EL elements. An illumination device includes: a plurality of organic EL elements; an operation unit that receives, for each organic EL element, chromaticity information that indicates chromaticity of the relevant organic EL element and luminance information that indicates the luminance of the relevant organic EL element; and a supply unit that, for each of the organic EL elements, supplies to an organic EL element a drive signal having amplitude that accords with the chromaticity indicated by the chromaticity information for that organic EL element for, within a unit time interval, a time interval that accords with luminance indicated by the luminance information for that organic EL element. | 01-24-2013 |
| 20130043805 | System-Voltage Transmission Branch of an Interface of an Operating Device for Light-Emitting Means - What is proposed is: an operating device for operating in particular a light-emitting means ( | 02-21-2013 |
| 20130049628 | Current-Switching LED Driver Using DAC to Ramp Bypass Currents to Accelerate Switching Speed and Reduce Ripple - A light-emitting diode (LED) driver provides faster rise and fall times for LED current to reduce image sticking and other interference. A standard DC-DC converter provides a sum current that is slowly ramped up and down by a bypass current digital-to-analog converter (DAC). A digital value to the bypass current DAC is ramped up or down before an LED current is turned on or off. When the LED current is turned on, current is shifted from a bypass path to a path through the LED, maintaining a constant sum current from the DC-DC converter. When a different LED is turned on, current is shifted from one LED's path to the other LED's path. Separate LED current DAC's in each LED path and in the bypass path can share the sum current with digital precision. Using a single DAC for the sum current and switches in each path reduces cost. | 02-28-2013 |
| 20130093349 | DRIVING CIRCUIT AND LAMPS - The invention relates to a driving circuit comprising a first bridge circuit, a second bridge circuit, a first protection device and a second protection device. The first bridge circuit comprising a first positive input terminal, a first negative input terminal, a first positive output terminal and a first negative output terminal is coupled to an AC voltage source to output a first voltage. The second bridge circuit comprising a second positive input terminal, a second negative input terminal, a second positive output terminal and a second negative output terminal is coupled to the AC voltage source to output a second voltage. The second and the first negative output terminals are both coupled to the ground potential. The first protection device is coupled between the second positive input terminal and the AC voltage source. The second protection device is coupled between the second negative input terminal and the AC voltage source. | 04-18-2013 |
| 20130113388 | Duty Cycle Adjustment of Remote Illumination Source to Maintain Illumination Output - A remote directs illumination of an illumination source according to a duty cycle. The duty cycle defines a first portion of time power is provided from a battery and a second portion of time power is not provided. The remote monitors voltage output by the battery and adjusts the duty cycle to increase the duration of the first portion based on a decrease of the monitored voltage compared to a maximum voltage level. The remote may adjust the duty cycle in order to maintain a consistent illumination output level. In some implementations, the remote may adjust the duty cycle based on one or more threshold values. In other implementations, the remote may adjust the duty cycle directly based on the measured voltage. In still other implementations, the remote may not calculate the duty cycle directly but may instead reference a lookup table. | 05-09-2013 |
| 20130127365 | LIGHT EMISSION SYSTEMS HAVING NON-MONOCHROMATIC EMITTERS AND ASSOCIATED SYSTEMS AND METHODS - Emission systems having solid-state transducers (SSTs) for producing a target chromaticity of light are disclosed herein. An emission system or SST device in accordance with a particular embodiment can include a first emitter having a first plurality of SSTs positioned to emit light having a first chromaticity, and a second emitter having a second plurality of SSTs positioned to emit light having a second chromaticity different than the first chromaticity. The SST device can further include a controller having a first channel with a variable output, coupled to the first emitter to adjust the brightness level of the first emitter, and a second channel with a variable output, coupled to the second emitter to adjust the brightness level of the second emitter. | 05-23-2013 |
| 20130127366 | LIGHTING CIRCUIT FOR LIGHT EMITTING ELEMENT AND ILLUMINATION APPARATUS INCLUDING SAME - A light-emitting-element lighting circuit for dimming a light emitting element by a PWM dimming signal of a duty ratio corresponding to an input dimming signal is provided. The lighting circuit includes a PWM dimming signal generating unit which generates the PWM dimming signal by performing a summation of AC wave signals including a fundamental wave and harmonics of different frequencies that are integer multiples of a fundamental frequency of the fundamental wave. The fundamental frequency is equal to or higher than a frequency, at which a sound pressure level is at maximum, in an audible frequency range in a correlation spectrum between the sound pressure level generated from the light emitting element and a frequency of an AC wave signal inputted to the light emitting element. | 05-23-2013 |
| 20130147388 | METHOD FOR OPERATING AT LEAST ONE LIGHT-EMITTING DIODE AND LIGHTING DEVICE FOR CARRYING OUT THE METHOD - In a method for operating at least one light emitting diode the at least one light emitting diode is operated at least in some ranges by means of a pulse number modulation, in which a number of uniform current pulses is set within a predetermined interval duration depending on a light energy desired value. | 06-13-2013 |
| 20130154502 | Apparatus and Methods for Control of a Light Emitting Device Using Power Line Communication - A lighting apparatus includes a light emitting device that has an attribute that is adjustable responsive to a control signal carried on a power line from which the light emitting device receives an Alternating Current (AC) power signal. | 06-20-2013 |
| 20130154503 | METHOD TO CONTROL A LIGHTING CURRENT OF A LIGHTING DEVICE - A method for controlling a lighting current of a lighting device with a number of semiconductor lighting means, installed for signaling and marking traffic areas of airports, in which period intervals are predetermined with a fixed period length, selected with an average lighting current to operate a semiconductor lighting means within the period intervals and in each of the period intervals a number of current pulses is generated with a pulse amplitude I | 06-20-2013 |
| 20130162166 | Modular Networked Light Bulb - A modular light emitting apparatus includes a light emitting device, a connector to couple to an AC power source, circuitry on a first electronics module to drive the light emitting device, and a support structure arranged to position and hold a second electronics module that conforms to a predetermined form factor. | 06-27-2013 |
| 20130175943 | Intelligent Lighting System for Sporting Apparatus - A lighting system for sports equipment is disclosed that includes one or more color-emitting light sources, which can be, for example, red-green-blue light-emitting diodes or flexible video displays, and a computer-based controller configured to vary emissions of said light sources. The sports equipment may be a snow board, snow skis, a skate board, water skis, and a wake board. | 07-11-2013 |
| 20130181634 | METHOD AND APPARATUS FOR SYNCHRONOUS SINE WAVE DIMMING OF LUMINARIES - A luminary dimming system having a three terminal dimming unit. The dimming unit includes a power controller and a receiver and is responsive to dimming directives received by the receiver. The power controller controls a buck switch and a freewheel switch in a manner that allows reduction of alternating current voltages. Such voltage reduction is accomplished in a manner that preserves the waveform of the source voltage and the power factor exhibited by the luminary. | 07-18-2013 |
| 20130193869 | METHOD FOR CONTROLLING A LIGHTING APPARATUS - Disclosed is a method for controlling a lighting apparatus comprising a first light source unit, a second light source unit and a third light source unit, all of which emit lights having mutually different color temperatures and mutually different color coordinates, the method comprising: outputting an R component signal, a G component signal and a B component signal, each of which respectively corresponds to light quantities of an R component, a G component and a B component of lights outputted from the first light source unit, the second light source unit and the third light source unit; receiving the R component signal, the G component signal and the B component signal and generating a comparative color coordinate; and comparing the comparative color coordinate with standard color coordinates located within an area formed by the respective color coordinates of the first, the second and the third light source units, and controlling light quantities of the first, the second and the third light source units in such a manner as to reduce an error value between the standard color coordinate and the comparative color coordinate. | 08-01-2013 |
| 20130200817 | Method for Minimizing Stroboscopic Effects in PWM Driven Lighting - An approach is provided for a method that minimizes stroboscopic effects in PWM driven lighting, which comprises acts of generating at least two enabling signals that drive at least one corresponding lamp, adjusting widths of pulses of each enabling signal corresponding to specific timestamps by a predetermined rule, and forming an overall brightness output in response to the superposition of the enabling signals. Each enabling signal is synchronized to an input power of the lamp. The method of the present invention makes light from lamps using multiple phases that significantly minimize stroboscopic effect. | 08-08-2013 |
| 20130221869 | METHOD AND APPARATUS FOR ACTIVE RIPPLE CANCELATION - Various embodiments of the invention allow for active AC ripple noise cancellation. In certain embodiments, noise cancellation is accomplished by modulating an LED driver output in a polarity opposite to the ripple, thereby, preventing interference with ripple-sensitive loads. Certain embodiments take advantage of a filter network to prevent the LED driver from modulating LED current in response to ripple that falls within a visible frequency range so as to prevent flicker in an LED backlight display. | 08-29-2013 |
| 20130221870 | AC WHITE LED DEVICE - An Alternate Current (AC) white Light-Emitting Diode (LED) device is provided, which belongs to the technical field of white LED manufacturing. The problem to be solved by the present invention is to low-costly overcome a series of deficiencies such as the stroboflash of an AC driven LED, and the heat dissipation difficulty caused by an integrated packaging of multiple LEDs. A white LED unit includes an LED chip and a light emitting material that can emit light when being excited by the LED chip. The luminous lifetime of the light emitting material is 1-100 ms. The LED chip only comprises one PN junction. The light emitted by the LED chip is mixed with the light emitted by the light emitting material to form white light. The white LED unit is driven by AC with a frequency not more than 100 Hz. The white LED device of prevent invention uses the single PN junction chip, rather than the prior integrated packaged AC multi-LED chip. | 08-29-2013 |
| 20130249430 | ADAPTABLE DRIVER CIRCUIT FOR DRIVING A LIGHT CIRCUIT - Driver circuits ( | 09-26-2013 |
| 20130257310 | LED-BELEUCHTUNGSVORRICHTUNG MIT LED-ZEILEN SOWIE VERFAHREN ZUM BETREIBEN DER LED-BELEUCHTUNGSVORRICHTUNG - It is the task of the present invention to provide an LED lighting device that is adapted for an AC voltage supply. | 10-03-2013 |
| 20130264963 | ELECTRONIC CANDLE - An electronic candle includes a power source, and two circuit assemblies electrically coupled to the power source in parallel and respectively including a waveform generator, a drive circuit and a first light-emitting diode being electrically connected in series. By means of controlling the two waveform generators to respectively generate a triangle wave, square wave, T wave or sawtooth wave, synchronously or asynchronously, the electronic candle simulates the flashing candlelight of a real wax candle. | 10-10-2013 |
| 20130278168 | UNIVERSAL POWER CONTROL DEVICE - The present invention is directed to an intelligent dimmer that is capable of “learning” the type of load it is controlling, and adjusts its operating parameters accordingly. The present invention can adaptively drive electrical loads over a wide range of wattages. The intelligent dimmer of the present invention is configured to automatically calibrate itself based on the load current demands of a particular electrical load. The intelligent dimmer of the present invention also adaptively limits in-rush currents to extend the life expectancy of the solid state switching components used therein. | 10-24-2013 |
| 20130293140 | CURRENT SOURCE AND METHOD FOR PROVIDING A DRIVING CURRENT - In one embodiment a current source comprises an input (In) for receiving a brightness signal (Sb), and an output (Out) for providing a driving current (Id) for at least one light-emitting diode, LED, wherein the current source (CS) is configured to extract a first and a second current value (idac_high, idac_low) from the brightness signal (Sb), to derive a duty cycle value (Smod) from the brightness signal (Sb) and to modulate the driving current (Id) as a function of the duty cycle value (Smod) in a pulse-width modulation comprising the first and the second current values (idac_high, idac_low). Furthermore, a method for providing a current is described. | 11-07-2013 |
| 20130313994 | MULTIPLE LIGHT PROJECTION TYPE IMAGE DISPLAY APPARATUS COMBINING AND PROJECTING LIGHTS FROM LIGHT SOURCES AND CONTROL APPARATUS THEREFOR - In a control apparatus for use in a multiple light projection type image display apparatus, the control apparatus includes a light source driver part configured to drive a plurality of light sources; and an apparatus controller configured to control the light source driver part. The light source driver part drives the plurality of light sources at respective different frequencies. | 11-28-2013 |
| 20130334980 | LED LIGHT DIMMING - A system and method for dimming an LED lighting installation using an AC power source are disclosed. The disclosed LED lighting system includes an LED light having one or more LEDs, a dimming control module for controlling and adjusting brightness level of the LED light toward a desired target brightness, and a user-operated lighting control device including a power on/off switch and a dimmer. The power on/off switch passes or interrupts the AC power fed into the dimming control module. A series of turned-off operations of the power on/off switch of transitory duration causes LED light target brightness levels to be progressively increasing or decreasing leading to a desired target brightness. Operations of the dimmer result in a target brightness setting signal being generated for the dimming control module, representative of a desired target brightness as well. | 12-19-2013 |
| 20140015436 | DIMMER CONTROL OF ANGULAR DISTRIBUTION OF LIGHT - A method for controlling an angular distribution of a light-beam emitted by a light-output device ( | 01-16-2014 |
| 20140049185 | LED LAMP WITH DUTY CYCLE DIMMING - A dimmable LED lamp assembly includes a power supply configured to receive an input power signal and produce a DC lamp current, a LED lamp coupled to the DC lamp current and configured to produce an amount of light corresponding to an amount of the DC lamp current, and a dimming controller coupled to the power supply and configured to adjust the amount of DC lamp current. The dimming controller is coupled to the input power signal and is further configured to determine a required dimming level based on the input power signal and to adjust the amount of DC lamp current such that the amount of light produced by the LED lamp corresponds to the determined required dimming level. | 02-20-2014 |
| 20140049186 | LOAD SYSTEM HAVING A CONTROL ELEMENT POWERED BY A CONTROL SIGNAL - A driver is connectable to an external power supply and configured to output variable electrical power for one or more loads, such as LEDs. A module including a microcontroller is operable to output a control signal that automatically varies the electrical power outputted by the driver. The microcontroller is further configured to be powered by the control signal. | 02-20-2014 |
| 20140125248 | LIGHTING APPARATUS AND METHODS USING OSCILLATOR-BASED DIMMING CONTROL - An apparatus includes a driver circuit configured to control a current through at least one LED responsive to a control signal. The apparatus further includes a modulated oscillator circuit configured to modulate an oscillating signal responsive to a dimming signal and to generate the control signal responsive to the modulated oscillating signal. | 05-08-2014 |
| 20140145638 | Circuit That Deciphers Between AC and DC Input Signals - Electronic devices require correct power in order to operate correctly. Receiving an incorrect power signal could potentially result in immediate and/or long term harm to the electronic device and/or catastrophic conditions. Certain devices, such as programmable logic controller (“PLC”) modules, may provide variable power to electronic devices, such as field devices comprising sensors and/or actuators. The present inventors have recognized that deciphering between AC and DC input signals before coupling electronic devices to such power sources may advantageously avoid harmful and/or catastrophic conditions. Aspects of the present invention provide an electronic circuit for deciphering between an AC and a DC input signal. Systems and methods are also described. | 05-29-2014 |
| 20140184090 | LIGHT-EMITTING DIODE DRIVING CIRCUITS AND DRIVING METHODS THEREOF - A driving circuit includes a first PWM driving module and a second PWM driving module. The first PWM driving module generates a first square-wave signal to drive a first illumination unit according to a first data signal of a data stream, wherein the first square-wave represents an illumination period of the first illumination unit in a display cycle. The second PWM driving module generates a second square-wave signal to drive the second illumination unit according to a second data signal of the data stream, wherein the second square-wave signal, which has a different phase with the first square-wave signal, represents an illumination period of the second illumination unit in the display cycle. | 07-03-2014 |
| 20140232288 | SOLID STATE LIGHTING APPARATUSES AND RELATED METHODS - Solid state lighting apparatuses are adapted to operate with alternating current (AC) received directly from an AC power source. An exemplary apparatus includes a substrate and multiple sets of one or more solid state light emitters disposed over the substrate. Multiple sets of solid state light emitters can be configured to be activated and/or deactivated at different times relevant to one another during portions of an AC cycle, and may optionally have different duty cycles. Emitter configurations, color combinations, and/or circuit components may reduce perceivable flicker, color shifts, and/or spatial variations in luminous flux. Color temperature and/or beam pattern may be adjusted. Multiple emitters may be arranged along non-coplanar substrate portions. | 08-21-2014 |
| 20140232289 | SOLID STATE LIGHTING APPARATUSES AND RELATED METHODS - Solid state lighting apparatuses and related methods are described. In certain embodiments, a solid state lighting apparatus adapted to operate with alternating current (AC) received from an AC power source is provided. The lighting apparatus can include a substrate and an array of solid state light emitters arranged on or supported by the substrate. Multiple solid state light emitter sets of the array can be arranged to be activated and/or deactivated at different times relative to one another during a portion of an AC cycle. The lighting apparatus can also include at least one reflective structure arranged between one or more solid state light emitters and at least one driver circuit component, to reduce or eliminate absorption by the driver circuit component(s) of light generated by the solid state light emitter(s). | 08-21-2014 |
| 20140239841 | LED LAMP WITH ADJUSTABLE COLOR - A color adjustable lamp. The lamp includes a first white emitter source having a plurality of colors so as to emit a first combined spectrum of light. A first drive signal having a first plurality of pulses at a first logic level and a second plurality of pulses at a second logic level operably controls the first white emitter source. The first and second pluralities of pulses having a first duty cycle. Changing a ratio of the pulses of the first and second pluralities, the first duty cycle, or both, changes the first combined spectrum. | 08-28-2014 |
| 20140246990 | LIGHTING DEVICE AND LIGHTING CONTROL METHOD - A lighting device may be provided that includes: a first to a fourth light emitting devices which are disposed on a substrate a first and a second pulse width modulation controllers which perform a pulse width modulation on currents applied to the first and the second light emitting devices respectively; and a first and a second controllers which control respectively currents applied to the third and the fourth light emitting devices having color temperatures different from those of the first and the second light emitting devices, wherein an (x, y) coordinate, which is determined by the mixture of the lights emitted from the first to the fourth light emitting devices and is located within a 1931 CIE chromaticity diagram, is moved onto a black body radiation curve within the 1931 CIE chromaticity diagram through the pulse width modulation of the first and the second pulse width modulation controllers and the control of the first and the second controllers. | 09-04-2014 |
| 20140320039 | Backlight control module and backlight control method - A backlight control module comprises a backlight computing unit configuring a frequency of at least one PWM signal according to a frequency of a frame, when at least one area frame of at least one display area is used for displaying the frame; a timing control unit configuring at least one starting time instant of a period of the at least one PWM signal according to at least one starting time instant of the at least one area frame, respectively; and a PWM unit generating the at least one PWM signal, and configuring at least one width of at least one on-period of the period of the at least one PWM signal according to at least one image data of the at least one area frame, respectively, wherein the at least one on-period is located at an end of the period of the at least one PWM signal, respectively. | 10-30-2014 |
| 20150035449 | DRIVER FOR ARRAYS OF LIGHTING ELEMENTS - A lighting system is disclosed comprising an excitor which drives at least one reactor. The excitor is an electrical waveform generator that creates an AC waveform at a frequency between about 50 kHz and about 100 MHz. The reactor is an under-damped resonant circuit that includes a network of lighting elements. Reactive components are distributed among the lighting elements. These reactive components can regulate the current and voltage to individual lighting elements. The drive system is particularly useful for arrays of low-voltage lighting elements such as LEDs. It is fault tolerant in that the failure of individual elements need not affect the operation of remaining elements, and elements can be added and removed without affecting the serviceability of other elements. | 02-05-2015 |
| 20150048753 | SHUNT DEVICE IN LIGHTING CONTROL SYSTEM WITHOUT NEUTRAL WIRE | 02-19-2015 |
| 20150054422 | LED DRIVING DEVICE AND LIGHTING DEVICE - An LED driving device includes a first converter configured to generate a first voltage, a second converter configured to generate a second voltage for driving a plurality of light emitting diodes (LEDs) from the first voltage, and a control circuit connected to an output terminal of the first converter and configured to control a level of the first voltage. The control circuit includes a cut-off circuit including a comparison circuit having hysteresis characteristics and a bleeder circuit. | 02-26-2015 |
| 20150061534 | Reduction of Harmonic Distortion for LED Loads - Apparatus and associated methods reduce harmonic distortion of a excitation current by diverting the excitation current substantially away from a number of LEDs arranged in a series circuit until the current or its associated periodic excitation voltage reaches a predetermined threshold level, and ceasing the current diversion while the excitation current or voltage is substantially above the predetermined threshold level. In an illustrative embodiment, a rectifier may receive an AC (e.g., sinusoidal) voltage and deliver unidirectional current to a string of series-connected LEDs. An effective turn-on threshold voltage of the diode string may be reduced by diverting current around at least one of the diodes in the string while the AC voltage is below a predetermined level. In various examples, selective current diversion within the LED string may extend the input current conduction angle and thereby substantially reduce harmonic distortion for AC LED lighting systems. | 03-05-2015 |
| 20150077011 | ILLUMINATION SYSTEM AND PHASE SIGNAL TRANSMITTER OF THE SAME - An illumination system includes an input interface, a phase angle control module, a lamp, and a driving module. The input interface is controllably switched between a first state and a second state. The phase angle control module is electrically connected to an AC power source and the input interface. When the input interface is at the first state, the phase angle control module modifies a voltage waveform of the AC power source to generate a delayed conduction angle in a half wave period of the voltage waveform. The driving module is stored with a control mode, wherein the driving module switches the control mode to control the lamp to emit light in accordance with the delayed conduction angle. | 03-19-2015 |
| 20150077012 | METHOD OF CONTROLLING MULTIPLE LAMPS - A method of controlling multiple lamps is applied to an illumination system, which includes an input interface, a signal transmitter, a plurality of signal receivers, a plurality of driving devices, and a plurality of lamps. The method includes the following steps: detect a state of the input interface with the signal transmitter; transmits a corresponding signal with the signal transmitter; each of the signal receivers receives the signal and detects a waveform of an AC power source, and each of the signal receivers transmits a corresponding control signal to the corresponding driving device to control the corresponding lamp at a reference point in the following cycle of the waveform of the AC power source. | 03-19-2015 |
| 20150084537 | SEMICONDUCTOR LIGHT EMITTING DEVICE - In a semiconductor light emitting device, a light emitting structure includes a first-conductivity type semiconductor layer, an active layer, and a second-conductivity type semiconductor layer, which are sequentially formed on a conductive substrate. A second-conductivity type electrode includes a conductive via and an electrical connection part. The conductive via passes through the first-conductivity type semiconductor layer and the active layer, and is connected to the inside of the second-conductivity type semiconductor layer. The electrical connection part extends from the conductive via and is exposed to the outside of the light emitting structure. An insulator electrically separates the second-conductivity type electrode from the conductive substrate, the first-conductivity type semiconductor layer, and the active layer. A passivation layer is formed to cover at least a side surface of the active layer in the light emitting structure. An uneven structure is formed on a path of light emitted from the active layer. | 03-26-2015 |
| 20150115829 | THEATRICAL EFFECTS CONTROLLER - Provided is a system for controlling lighting effects. The system comprises a controller and one or more wireless dimmer devices with incorporated digital effects engine. The controller transmits wirelessly and effects parameters to the wireless dimmer devices. The dimmer devices receive the effects parameters, generate output effects parameters using the digital effects engine, and provide the output effects parameters to either dimmer output channels or DMX output channels. The digital effect engine comprises a low frequency oscillator and several random number generators. The random number generators may be used to modulate frequency of the low frequency oscillator and modulate a level of each dimmer output channel. The random number generators are configured to generate independent strings of pseudo-random numbers. | 04-30-2015 |
| 20150123559 | OPTICAL SEMICONDUCTOR LIGHTING APPARATUS - An optical semiconductor lighting apparatus includes: a housing; a heat discharge block which is made of a metal and is embedded in the housing; an AC direct-connection module which is made of a metal and is embedded in the housing, the AC direct-connection module including a semiconductor optical device which is driven in an AC direct-connection scheme; and an insulation connector which is provided in the AC direct-connection module and is exposed to an outside of the housing for electrical connection with an external power source. | 05-07-2015 |
| 20150137696 | AC Direct Drive Lighting System for Providing Uniform Light Distribution - An AC lighting system for providing uniform light distribution is disclosed. According to one embodiment, the AC lighting system includes an AC driver and LED packages electrically connected to the AC driver. Each LED package includes a plurality of LED elements and is physically distributed over an illuminating surface of the AC lighting system. The AC driver has a first current sink that drives a first LED group and a second current sink that drives the first LED group and a second LED group. The first LED group includes at least one LED element from each of the LED packages, and the second LED group includes at least one LED element other that the first set of LED elements from each of the LED packages. | 05-21-2015 |
| 20150351172 | LED POWER CIRCUIT AND LAMP USING THE SAME - An LED power circuit for converting AC power into DC power to drive at least one LED to output light. The LED power circuit includes an input unit, a current suppression unit, a power adjustment unit, a rectifier module and an output unit. The input unit receives the AC power. The current suppression unit is coupled to the input unit. The current suppression unit suppresses a current pulse and correspondingly outputs the AC power. The power adjustment unit is coupled to the current suppression unit to control and adjust the current and/or the power of the AC power. The rectifier module is coupled to the power adjustment unit to convert the AC power into DC power. The output unit is coupled to the rectifier module and at least one LED. The output unit outputs the DC power to the at least one LED. | 12-03-2015 |
| 20160029454 | AC WHITE LED DEVICE - An Alternate Current (AC) white Light-Emitting Diode (LED) device is provided, which belongs to the technical field of white LED manufacturing. The problem to be solved by the present invention is to low-costly overcome a series of deficiencies such as the stroboflash of an AC driven LED, and the heat dissipation difficulty caused by an integrated packaging of multiple LEDs. A white LED unit includes an LED chip and a light emitting material that can emit light when being excited by the LED chip. The luminous lifetime of the light emitting material is 1˜100 ms. The LED chip only comprises one PN junction. The light emitted by the LED chip is mixed with the light emitted by the light emitting material to form white light. The white LED unit is driven by AC with a frequency not more than 100 Hz. The white LED device of prevent invention uses the single PN junction chip, rather than the prior integrated packaged AC multi-LED chip. | 01-28-2016 |
| 20160081146 | TRIAC Low Voltage Dimming Control System - A TRIAC low voltage dimming control system for effectively controlling the dimming of low voltage lighting using a TRIAC dimmer. The TRIAC low voltage dimming control system generally includes a TRIAC analyzer that applies a test voltage to a TRIAC dimmer and measures the amount of time required for the TRIAC dimmer to conduct electricity. Utilizing the measured time for the TRIAC dimmer to conduct electricity, the TRIAC analyzer is able to calculate an approximate state of the TRIAC dimmer and provide a corresponding level of DC electrical power to a DC load. | 03-17-2016 |
| 20160113074 | Button Backlight Processing Method and Apparatus and Terminal Device - A button backlight processing method and apparatus and a terminal device. The button backlight processing method includes receiving an instruction for turning on button backlight; obtaining a button backlight parameter according to the instruction, where the button backlight parameter is corresponding to a current theme interface of a terminal device; and turning on the button backlight according to the button backlight parameter. The embodiments of the present disclosure achieve a color diversity of button backlight, and meet individualized requirements of users. | 04-21-2016 |
| 20160135264 | ENABLE CIRCUIT FOR LIGHTING DRIVERS - This relates to an enable driver circuit for an LED drive. In some examples, the enable driver circuit may sense an input of the LED driver and enable the LED driver when a conduction angle of the input is greater than a threshold value after a set amount of line cycles of the input of the LED driver have occurred. If the conduction angle is not greater than the threshold after the set amount of line cycles, the enable driver circuit may not enable the LED driver and power may not be delivered to the LED load. In some examples, the enable driver circuit may further enable the LED driver if the conduction angle of the input increases by a certain amount and the resultant conduction angle is greater than the threshold, regardless of the number of line cycles of the ac input voltage that have occurred. | 05-12-2016 |
| 20160135266 | GATE VOLTAGE THRESHOLD TURN OFF FOR MAINTAINING VOLTAGE SUPPLY DURING STANDBY MODE OF A LIGHTING SYSTEM - Provided is a lighting system that includes a plurality of lighting elements to emit light, a power supply to supply power, a lighting driver including a microcontroller and to output power to the plurality of lighting elements for operation thereof, a control system to transmit a control signal to the microcontroller to initiate a standby mode of the plurality of lighting elements, and a semiconductor device configured to receive voltage from the microcontroller, and selectively enable and disable a low power consumption mode of the lighting driver, to thereby maintain voltage for communication between the microcontroller and the control system during the standby mode. | 05-12-2016 |
