| Entries |
| Document | Title | Date |
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| 20080224625 | Constant current light emitting diode (LED) driver circuit and method - A drive circuit supplies a drive current to a plurality of light emitting diodes. The drive circuit includes a voltage converter circuit having a particular topology and including at least one inductive element and at least one switching element. The drive circuit senses a current through one of the inductive and switching elements and generates a feedback signal from the sensed current. The feedback signal has a value indicating the drive current being supplied to the light emitting diodes and the drive circuit controls the operation of the voltage converter responsive to the feedback signal. | 09-18-2008 |
| 20090015171 | BACKLIGHT SYSTEM - The backlight system comprises a light source module, a control circuit board, a current-balancing circuit board, and a plurality of high voltage lines. The light source module comprises a plurality of light sources. The control circuit board is configured with a control circuit for converting a received signal to a high voltage signal to drive the light source module. The current-balancing circuit board is configured with a four-layered structure and copper foils within the four-layered structure form a plurality of capacitors so as to balance current flowing through the light sources. The plurality of high voltage lines connect the control circuit board to the current-balancing circuit board. | 01-15-2009 |
| 20090026973 | LIGHTING APPARATUS - A lighting apparatus according to the present invention includes: a plurality of solid state light emitting devices; a holding unit which holds the plurality of solid state light emitting devices; a casing inside which the holding unit is disposed; a first terminal and a second terminal disposed at a longitudinal end of the casing; a third terminal and a fourth terminal disposed at the other longitudinal end of the casing; a first rectification unit which converts alternating current power, supplied from an external source to the first terminal and the third terminal, into direct current power, and to supply the direct current power to the plurality of solid state light emitting devices; and a second rectification unit which converts alternating current power, supplied from the external source to the second terminal and the fourth terminal, into direct current power, and to supply the direct current power to the plurality of solid state light emitting devices. | 01-29-2009 |
| 20090195170 | ELECTRONIC POWER SUPPLY DEVICE FOR LIGHT-EMITTING DIODE - An electronic power supply device is provided for light-emitting diodes (LEDs), which employs electronic control to maintain the LEDs within the rated ranges of current, voltage and temperature and provides the LEDs with extremely stable current, voltage and temperature. Meanwhile, the power supply device is effective in confining the LEDs within the rated ranges of voltage, current, and temperature so that the excellent electronics protection and design of logic device realized by the power supply device effectively overcomes aging/deterioration of LEDs caused by exceeding voltage and current and burning out due to exceeding temperature and also effectively pushes the rated current and voltage of a (low-power) LED module toward the maximum values to provide the greatest luminous efficiency for upgrading the applications of the LEDs to the primary grade of lighting. | 08-06-2009 |
| 20100013397 | POWER CONVERSION STRUCTURE - A power conversion structure includes a power factor correction circuit which has an energy storage coil, a switch and a voltage boosting control unit. The voltage boosting control unit drives the switch to set OFF and ON of the switch to change the period of current passing through the energy storage coil to alter the phase of the current. The energy storage coil is coupled with at least one induction coil to induce and generate driving power to energize lighting equipment. The amount of the driving power is determined by the coil ratio of the induction coil and the energy storage coil. Through the induction coil, the energy storage coil can be induced to generate the driving power which is determined by the coil ratio of the induction coil and energy storage coil. | 01-21-2010 |
| 20100090609 | 3-WAY LED BULB - Circuits to make a 3-way LED light bulb correctly interface to a standard 3-way light socket, producing three levels of light corresponding to the three settings of the socket. One of the circuits prevents color shift due to varying LED current. | 04-15-2010 |
| 20100097000 | LOW COST COMPACT SIZE SINGLE STAGE HIGH POWER FACTOR CIRCUIT FOR DISCHARGE LAMPS - The present application claims a compact low cost topology solution of a ballast for a discharge lamp that can provide both high power factor and low total harmonic distortion with fewer components than prior art. The topology provides the feature of a low crest factor and quick start that increase both the lamp life and the number of starts for the product. By using Bipolar Junction Transistor instead of Field Effect Transistor as the main switches and also a lower value electrolytic, the cost and size are considerably reduced. | 04-22-2010 |
| 20110101876 | Light Emitting Diode Driving Circuit - A LED driving circuit includes a transformer, a rectifying filtering circuit, a PWM IC, a constant current circuit, and a feedback circuit. The transformer has a primary side and a secondary side. The rectifying filtering circuit is coupled to the secondary side and has a first output terminal. The PWM IC is coupled to the primary side. The constant current circuit has a second output terminal. A LED load is adapted to couple between the first output terminal and the second output terminal. The feedback circuit has a first input terminal coupled to the first output terminal to receive a first voltage and a second input terminal coupled to the constant current circuit to receive a second voltage. The second voltage varies with a conduction status of the LED load. The feedback circuit is adapted to control the PWM IC according to the received first and second voltages. | 05-05-2011 |
| 20110227495 | LIGHT EMITTING DIODE LIGHTING DEVICE - A lighting device comprises a mounting head having multiple facets each configured to retain an associated Light Emitting Diode (LED). The LEDs are mounted to the facets with a thermally conductive metal pad and thermally conductive adhesive. A connector for the lighting device inserts into a light socket and receives power for operating the LEDs. A heat transfer body is coupled between the mounting head and the connector and transfer heat generated by the LEDs downward from the mounting head and then radially outward. The mounting head, adhesive, metal pad, and heat transfer body form a heat transfer structure that more effectively removes heat generated by the LEDs. In one embodiment, a dimmer circuit is also provided that allows the LED lighting device to operate with conventional dimmer switches. | 09-22-2011 |
| 20110279047 | AC LIGHT EMITTING DEVICE, DRIVING DEVICE THEREOF, AND DRIVING METHOD THEREBY - An AC light emitting device, a driving device thereof and a driving method are disclosed. The driving device includes a sub-driving part turned on corresponding to each of positive and negative voltage regions of an AC voltage source to provide current paths for operating at least two LEDs, and a free-charge part charging with a voltage to be supplied to one of the at least two LEDs which is not operated while the other LED is operated by the sub-driving part. The AC light emitting device, the driving device thereof and the driving method thereby can solve problems, such as a decrease in power factor, severe total harmonic distortion, excessive flickering, and the like, due to operating characteristics of the AC light emitting device by application of an AC voltage source thereto. | 11-17-2011 |
| 20110309759 | Adaptive Current Regulation for Solid State Lighting - Exemplary embodiments provide an apparatus, system and method for power conversion to provide power to solid state lighting, and which may be coupled to a first switch, such as a dimmer switch. An exemplary system comprises: a switching power supply; solid state lighting; a first adaptive interface circuit to provide a resistive impedance to the first switch and conduct current from the first switch in a default mode; and a second adaptive interface circuit to create a resonant process. An exemplary apparatus comprises: a switching power supply; and an adaptive interface circuit comprising a resistive impedance coupled in series to a reactive impedance to conduct current from the first switch in a first current path in a default mode, and further comprising a second switch coupled to the reactive impedance to conduct current from the first switch in a second current path, with the adaptive interface circuit further damping oscillation when the first switch turns on. | 12-22-2011 |
| 20110309760 | LED Illumination systems - An illumination system includes a power supply having a boost converter operating in the discontinuous conduction mode, a flyback converter operating in the critical conduction mode, and a switch coupled to the flyback converter. Several light emitting diodes receive power from the power supply. The boost converter may include a boost inductor (L | 12-22-2011 |
| 20120001559 | LED ARRAY DRIVER - An LED driver ( | 01-05-2012 |
| 20120007516 | LED TASK LIGHTING SYSTEM - The disclosure provides an LED light system that is easy to install and customizable by the user. The LED lighting system may be plugged directly into an existing power source. In one configuration, the system includes a power supply that accepts standard power inputs. A low voltage low voltage bus line extends from the power supply. The user may connect LED light modules at essentially any location along a low voltage bus line of the system so that the light modules are located exactly where the user desires light. Uneven spacing is possible. Different size lights, different lumen powers, and different-colored light modules may be disposed along the low voltage bus line. Security features may be used to reduce the value of the system components to a thief. | 01-12-2012 |
| 20120025724 | Coordinated Dimmer Compatibility Functions - A system and method includes a controller that is configured to coordinate (i) a low impedance path for a dimmer current, (ii), control of switch mode power conversion and (iii) an inactive state to, for example, to allow a dimmer to function normally from cycle to cycle of an alternating current (AC) supply voltage. In at least one embodiment, the dimmer functions normally when the dimmer conducts at a correct phase angle indicated by a dimmer input setting and avoids prematurely resetting while conducting. In at least one embodiment, by coordinating functions (i), (ii), and (iii), the controller controls a power converter system that is compatible with a triac-based dimmer. In at least one embodiment, the controller coordinates functions (i), (ii), and (iii) in response to a particular dimming level indicated by a phase cut, rectified input voltage supplied to the power converter system. | 02-02-2012 |
| 20120025725 | POWER CONVERTER - The present invention includes a first DC converter converting AC voltage, into DC voltage while correcting a power factor, and a second DC converter electrically isolating the first DC converter from an LED group load, and converting the DC voltage, into a predetermined DC voltage and supply the resultant voltage to the LED group load. The second DC converter includes a current detection circuit disposed on the secondary side, and detecting current flowing into the LED group load, an error amplifier amplifying an error between a detected current value detected and a reference current value, a signal transmission isolation element transmitting a control signal based on an output signal from the error amplifier, to the primary side, and a switching element transferring power to the secondary side through the transformer by being turned on/off according to the control signal. | 02-02-2012 |
| 20120032604 | SYSTEM FOR DRIVING A LAMP | 02-09-2012 |
| 20120043900 | Method and Apparatus for Measuring Operating Characteristics in a Load Control Device - A load control device, such as an electronic ballast, for controlling the power delivered from an AC power source to an electrical load, such as one or more fluorescent lamps, comprises a power converter having an inductor and a power switching device coupled to the inductor, a load control circuit adapted to be coupled to the electrical load, and a control circuit operable to calculate an average input power of the load control device. The control circuit may be operable to calculate a cumulative output power of the power converter while the ballast is preheating filaments of the lamps, and to subsequently determine a fault condition in the lamps in response to the calculated cumulative output power of the power converter. Further, the control circuit may be operable to transmit a digital message including the calculated average input power of the load control device. | 02-23-2012 |
| 20120062133 | LOW VOLTAGE LED DIMMER WITH INTEGRATED UNIVERSAL SWITCH MODE POWER SUPPLY - A low voltage dimmer for LED lamps incorporates an AC-DC power supply along with a Pulse Width Modulator (PWM) to modify the power delivered to an LED load is configured to fit inside the form factor of a standard single gang electrical to control the intensity of the light emitted by the LED. The PWM portion of the dimmer circuit incorporates a microprocessor configured to produce a train of output pulses and controlled by a variable input voltage to modulate the output duty cycle of these pulses to drive one or more LED lamps to switch between “on” and “off” conditions. Variation of the duty cycle of the pulses regulates the total amount of time in each cycle that the lamp is illuminated, with the aggregate “on” time determining the apparent brightness of the lamp. | 03-15-2012 |
| 20120068616 | LED DRIVE CIRCUIT - An object of the invention is to provide an LED drive circuit that can suppress the generation of harmonic noise. The LED drive circuit includes a rectifying circuit an LED array, and a current supply circuit which includes a capacitor and a time constant adjusting element, wherein the discharge time constant of the current supply circuit is set longer than the charge time constant of the current supply circuit, and wherein during a period of time when the magnitude of AC commercial power supply voltage is larger than the light emission threshold of the LED array, current to the light-emitting circuit is supplied mostly from the rectifying circuit, and during a period of time when the magnitude of AC commercial power supply voltage is not larger than the light emission threshold of the LED array, current to the light-emitting circuit is supplied from the current supply circuit. | 03-22-2012 |
| 20120074857 | DRIVING CIRCUIT FOR LIGHT EMITTING ELEMENTS - A driving circuit for light emitting elements comprises a rectifying unit, a first constant current unit, a first driving transistor, a first voltage control unit and at least one first light emitting element. The rectifying unit has a first terminal and a second terminal, is connected to an external power source that provides alternating current power that is sinusoidal and has alternating negative and positive segments, inverts the negative segments of the AC power to positive segments and forms a pulsating direct current voltage. The first constant current unit has a first end and a second end. The first driving transistor comprises a first gate, a first drain and a first source. The first voltage control unit comprises a first variable resistor and a first bias control element. The first light emitting element has a first end and a second end. | 03-29-2012 |
| 20120098448 | LIGHT EMITTING DIODE DRIVING DEVICE - An exemplary embodiment of the present invention discloses a light emitting diode (LED) driving device for an LED device having a plurality of LEDs, the driving device including a rectifying unit configured to receive an alternating current (AC) voltage and output a rectified voltage, and a driving control unit configured to drive the plurality of LEDs based on stored data by receiving the rectified voltage at a first period. | 04-26-2012 |
| 20120104956 | LED EMITTING DEVICE - The present invention relates to an LED emitting device. | 05-03-2012 |
| 20120104957 | LIGHT-EMITTING DEVICE - A light-emitting device ( | 05-03-2012 |
| 20120146527 | LED DRIVING CIRCUIT - An LED driving circuit includes a rectifying unit connected to an AC power, an LED unit, a voltage-controlled transistor, a current detection unit, a low-pass filter and a current control unit. The rectifying unit, the LED unit, the voltage-controlled transistor and the current detection unit are connected in series to form a current loop. The current detection unit generates a square DC voltage signal representing the current flow in the current loop. The low-pass filter transfers the square DC voltage signal to an average voltage signal. The current control unit compares the average voltage signal to a reference voltage. According to the result of the comparing, the current control unit outputs a corresponding control signal to the voltage-controlled transistor to maintain the current flow in the current loop as a constant. Therefore, the brightness of the LED unit can be uniform. | 06-14-2012 |
| 20120161656 | 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. | 06-28-2012 |
| 20120206057 | METHOD OF DRIVING LIGHT SOURCE, LIGHT SOURCE MODULE FOR PERFORMING THE METHOD AND DISPLAY APPARATUS HAVING THE LIGHT SOURCE MODULE - A method of driving a light source includes receiving an alternating current (“AC”) voltage from outside, generating a first direct current (“DC”) voltage based on the AC voltage, generating a second DC voltage, corresponding to a difference between a driving voltage of a light source part and the first DC voltage, based on the first DC voltage, and outputting a sum of the first DC voltage and the second DC voltage to the light source part | 08-16-2012 |
| 20120235586 | 3-WAY LED BULB - A lighting circuit for a light emitting diode (LED) bulb capable of operating at different light output levels depending on received AC power includes a first group of LEDs and second group of LEDs, each of which is configured to emit light as a group. The lighting circuit also includes an AC/DC converter electrically connected to the first and second groups of LEDs. A detector circuit detects received AC power. A selection circuit is operable to cause the AC/DC converter circuit to provide current into one configuration of LEDs from the group of configurations of LEDs consisting of: the first group of LEDs only, the second group of LEDs only, and the first and second group of LEDs. The configuration of LEDs to provide current to is selected based on received AC power. | 09-20-2012 |
| 20120235587 | CIRCUIT WITH PASSIVE COMPONENTS FOR HIGH-SPEED DRIVE OF AN OPTOELECTRONIC DEVICE - A circuit for the ultra-quick control of an optoelectronic device, includes a generator of voltage pulses having a pulse duration of less than 400 ps, and a circuit ( | 09-20-2012 |
| 20120242239 | AC Light Emitting Diode and AC LED Drive Methods and Apparatus - An LED device for use with an AC voltage power source configured such that at least one LED emits light during a positive phase of power provided from an AC power supply and at least one LED emits light during the negative phase of power provided from an AC power supply. The LED device includes a first power connection lead and a second power connection lead, both leads capable of being connected to and receiving power from an AC power supply. | 09-27-2012 |
| 20120249003 | LIGHTING DEVICE FOR SEMICONDUCTOR LIGHT EMITTING ELEMENT AND ILLUMINATION APPARATUS INCLUDING SAME - A lighting device for a semiconductor light emitting element includes a series circuit of two switching elements which are alternately turned on, the series circuit being connected to a direct current (DC) input power source and a reactance circuit connected between a connection node of the two switching elements and one end of the DC input power source through a capacitor, an output of the reactance circuit being supplied to the semiconductor light emitting element through a rectifier circuit. A dimming operation of the semiconductor light emitting element is performed by varying a ratio of ON periods of the two switching elements. | 10-04-2012 |
| 20120262078 | LED WITH INTEGRATED CONSTANT CURRENT DRIVER - An LED package containing integrated circuitry for matching a power source voltage to the LED operating voltage, LEDs containing such integrated circuitry, systems containing such packages, and methods for matching the source and operating voltages are described. The integrated circuitry typically contains a power converter and a constant current circuit. The LED package may also contain other active or passive components such as pin-outs for integrated or external components, a transformer and rectifier, or a rectifier circuit. External components can include control systems for regulating the LED current level or the properties of light emitted by the LED. Integrating the power supply and current control components into the LED can provide for fabrication of relatively small LEDs using fewer and less device-specific components. | 10-18-2012 |
| 20120268024 | CURRENT-SHARING BACKLIGHT DRIVING CIRCUIT FOR LIGHT-EMITTING DIODES AND METHOD FOR OPERATING THE SAME - A current-sharing backlight driving circuit for light-emitting diodes and a method for operating the same are disclosed. The current-sharing backlight driving circuit includes a class-E converter and a plurality of power processing units. The class-E converter receives a DC input voltage and produces an AC output voltage. The AC output voltage outputted from the class-E converter is converted into a DC driven voltage thorough the power processing units, thus driving the light-emitting diodes and providing a current-sharing backlight operation. | 10-25-2012 |
| 20120268025 | SWITCHING CIRCUIT SYSTEM FOR ADJUSTING BRIGHTNESS AND METHOD THEREOF - A switching circuit system includes a rectification circuit, a transformer, a light-emitting unit, a touch panel including a plurality of touch sensors, and a central processing unit (CPU). The CPU determines that a first user operation is taken place on the touch panel when first and second touch signals from at least two touch sensors have been received within a predetermined time interval, and further determines the track of the touches according to the sequence in which the first and second touch signals were received when the first user operation was determined. The CPU further directs the transformer to control the voltage output to the light-emitting unit according to the determined touch track to control the switching circuit system to execute a first function, and otherwise, a second user operation is determined which executes a second function. A related method is also provided. | 10-25-2012 |
| 20120286682 | BI-LEVEL LAMP BALLAST - A bi-level lamp ballast to selectively operate two lamps is provided. The ballast includes a control circuit having an input, connected to a switching network, and an output, which provides a particular control signal based on the state of the switching network. The ballast also includes respective lamp control switches, each having respective outputs. The first switch is connected to the output and a ballast power supply. In its first state, it connects the ballast power supply to its first output, and in its second state, it connects the ballast power supply to its second output. The second switch is connected to the output and a ground. In its first state, it connects the ground to its first output, and in its second state, it connects the ground to its second output. The state of each lamp control switch depends on the control signal generated by the control circuit. | 11-15-2012 |
| 20120286683 | LED LIGHTING CIRCUIT - The invention describes an AC-LED lighting circuit ( | 11-15-2012 |
| 20120293086 | Light-Emitting Module and Luminaire - A light-emitting module in the embodiment includes a plurality of light-emitting elements, a power circuit, a power terminal, a feeding power terminal, and a substrate. The power circuit is configured to supply electric power to the light-emitting elements and performs lighting control. The power terminal is connected to the power circuit. The feeding power terminal is electrically connected to both ends of the power terminal. The substrate includes the plurality of light-emitting elements, the power circuit, the power terminal, and the feeding power terminal mounted thereon. | 11-22-2012 |
| 20120299494 | LED TUBULAR LAMP AND LIGHTING FIXTURE ARRANGEMENT - A LED tubular lamp comprising a translucent tube ( | 11-29-2012 |
| 20120299495 | LIGHT-EMITTING DIODE DRIVING APPARATUS INCLUDING CHARGING/DISCHARGING CAPACITOR - A charging diode | 11-29-2012 |
| 20120299496 | CONSTANT POWER SUPPLY CONVERTER FOR AN LED MODULE - The present invention relates to a power supply apparatus for an LED light source, in which the power supply apparatus for supplying driving power to a high efficiency LED light source has a power factor compensating function that improves power efficiency. To accomplish this, the power supply apparatus for an LED light source according to the present invention comprises a power factor compensation control circuit which includes a step-up transformer, and which compensates for a power factor of commercial alternating current power and outputs power; a charging capacitor, in which the power output from the power factor compensation control circuit is stored; a resonant switching circuit which switches power output from the charging capacitor, and supplies the voltage level required by a load side; a rectifying circuit which rectifies the voltage output from the resonant switching circuit into a predetermined direct current voltage; an LED power switching circuit which switches the voltage rectified by the rectifying circuit, and supplies the switched voltage to the load side; a voltage control circuit which senses the voltage output from the rectifying circuit, and controls a switching frequency of the resonant switching circuit to control the size of the voltage output from the rectifying circuit; and an oscillation circuit which supplies oscillation output to the LED power switching circuit to switch the supplied output by a predetermined frequency. | 11-29-2012 |
| 20120313540 | LIGHT EMITTING APPARATUS - A light emitting apparatus receives an external power and includes a light-emitting unit, two rectifiers, a first electrical connection element and a second electrical connection element. Each of the rectifiers has a first input terminal, a second input terminal, an output terminal and a ground terminal. The output terminals are electrically connected together and are electrically connected with the light-emitting unit. The first electrical connection element is electrically connected with the external power and the first input terminals. The second electrical connection element is electrically connected with the external power and the second input terminals. The light emitting apparatus can replace the traditional fluorescent tube without changing the circuit of the lighting. | 12-13-2012 |
| 20120313541 | LED DRIVING CIRCUIT - The invention is directed to the provision of an LED driving circuit that switches the connection of LED blocks in accordance with the supply voltage and the Vf's specific to individual LEDs contained in each LED block. The LED driving circuit includes a rectifier; a first circuit, a first current detection unit for detecting current flowing from the first LED array to the negative output of the rectifier, and a first current limiting unit for limiting the current flowing from the first LED array to the negative output of the rectifier in accordance with the current detected by the first current detection unit, and a second circuit which includes a second LED array and a current path passing through the second LED array and leading to the negative output of the rectifier, and wherein a current path in which only the first LED array is connected to the rectifier and a current path are formed in accordance with an output voltage of the rectifier, and the first current detection unit, upon detecting current flowing through the first and second LED arrays, operates the first current limiting unit to perform current path switching. | 12-13-2012 |
| 20120319605 | ILLUMINATION DRIVING APPARATUS - A fixture-compatible, dimmable illumination driving apparatus including: a rectifying unit rectifying a phase-controlled waveform of an alternating current (AC) power; a comparing unit comparing an output waveform of the rectifying unit with a first voltage according to a preset reference clock; a reference voltage generating unit generating a reference voltage corresponding to the number of high signals higher than the first voltage among outputs of the comparing unit during one cycle of the output waveform; and a pulse width modulation (PWM) signal generating unit generating a PWM signal from the reference voltage and a feedback voltage. | 12-20-2012 |
| 20120326616 | LIGHT EMITTER DRIVING DEVICE AND LIGHTING APPLIANCE THEREWITH - A light emitter driving device has a decoder portion which monitors a rectified voltage and generates a dimming signal, and a drive current control portion which controls a drive current to a light emitter according to the dimming signal. The decoder portion has a comparator which compares the rectified voltage with a predetermined threshold voltage to generate a comparison signal, a sampling counter which measures high-level and low-level periods of the comparison signal, a duty calculation portion which calculates the duty of the rectified voltage based on the output of the sampling counter, a filter calculation portion which excludes sporadic variation in duty by applying digital filtering to the output of the duty calculation portion, and a dimming signal generation portion which generates the dimming signal based on the output of the filter calculation portion. | 12-27-2012 |
| 20130009559 | DRIVING CURRENT GENERATION CIRCUIT, LED POWER SUPPLY MODULE AND LED LAMP - A driving current generation circuit includes a semiconductor device configured to operate with a variable voltage as a reference voltage, a driving current generator configured to generate a driving current for driving an LED (Light Emitting Diode) based on an instruction received from the semiconductor device, and a dimming voltage converter configured to generate a second dimming voltage set based on the variable voltage from a first dimming voltage set based on a ground voltage, wherein the semiconductor device performs a driving control of the driving current generator based on the second dimming voltage. | 01-10-2013 |
| 20130009560 | ILLUMINATION LIGHT CONTROL APPARATUS AND LED ILLUMINATION SYSTEM - An LED illumination system comprises a light control apparatus, and an LED illumination instrument including first and second LEDs. The light control apparatus includes: a first control unit determining a total amount of average currents to be supplied to the first and the second LEDs at every predetermined cycle depending on an operation amount of a first operation unit; a second control unit determining a ratio between the average currents to be supplied to the first and second LEDs respectively at the every predetermined cycle depending on an operation amount of a second operation unit; and a supply unit generating currents having the total amount of the average currents and the ratio between the average currents determined by the first and second control units at the every predetermined cycle by using a DC power source and supplying the currents to the LED illumination instrument. | 01-10-2013 |
| 20130015775 | METHOD FOR SETTING AND ADJUSTING LIGHT EMITTED FROM AN ADJUSTABLE LIGHTING DEVICE, ADJUSTABLE LIGHTING DEVICE AND LIGHT-ADJUSTING CIRCUIT THEREOFAANM WU; CHIH-YENAACI TAIPEIAACO TWAAGP WU; CHIH-YEN TAIPEI TW - A method for setting and adjusting light emitted from an adjustable lighting device is disclosed. The adjustable lighting device includes a timing unit and anon-volatile memory (NVM) module for storing a record data which includes a memory flag changeable between a set state and a reset state, and a plurality of light setting values. In the method, the adjustable lighting device is configured to allow a user to select an illumination state of the light, and to change the memory flag in the record data to the set state and to store the record data with a corresponding one of the light setting values when a elapsed time counted by the timing unit is longer than a predetermined threshold time period. | 01-17-2013 |
| 20130020955 | LIGHTING SYSTEM - A lighting system includes a main power source, a power switch, a daylight white color light source driver, an incandescent color light source driver, a first light source unit, and a second light source unit. The power switch includes a first terminal connected to the main power source, a second terminal and a control terminal. The two drivers are connected to the second terminal of the power switch. The first light source unit is driven by the daylight white color light source driver. The second light source unit is driven by the incandescent color light source driver. A switch driving circuit for applying power-saving switch signals is connected to the control terminal of the power switch, and a signal processing circuit for outputting instruction signals is connected to the switch driving circuit. | 01-24-2013 |
| 20130026935 | LED LUMINESCENCE APPARATUS - A light-emitting diode (LED) luminescence apparatus configured to receive an alternating current (AC) power includes a plurality of LED units, and a plurality of constant current control units electrically connected to the plurality of LED units. The current control units are configured to control current flowing through each of the LED units so that the current has a specific magnitude. | 01-31-2013 |
| 20130033187 | Wireless monitoring and control device for indoor and outdoor lighting - The invention provides a wireless means of power monitoring and control of lighting fixtures. The device consists of five sections; line voltage AC to DC convertor and DC power circuit, voltage sensing circuit, current sensing circuit, relay circuit, and wireless microcontroller (“WUC”). Power input to the device is made via a multi-pronged connector (“MPC”). The AC to DC convertor reduces voltage to an acceptable level for the DC voltage circuit to power the circuitry on the printed circuit boards. A logic-controlled relay circuit provides on/off control of the light fixture outputting to the “Load” terminal of the MPC. Line voltage from the MPC enter current and voltage sensing circuits, continues through signal shaping circuits, and is provided to the WUC for processing. The two input signals are scaled and computed to provide power consumption values which are then transmitted wirelessly to a building automation control network. | 02-07-2013 |
| 20130038230 | METHOD AND APPARATUS TO FACILITATE COUPLING AN LED-BASED LAMP TO A FLUORESCENT LIGHT FIXTURE - Methods and apparatus to facilitate coupling a light-emitting diode (LED)-based lamp to an electronic or inductive fluorescent light fixture (typically with ballast). An LED-based lamp may include circuitry that simulates an electrical behavior of a fluorescent lamp, and can be installed and operate in the fixture without any modification to the fixture. The LED-based lamp may also include one or more LEDs that are controlled by the circuitry. | 02-14-2013 |
| 20130043800 | POWER CONVERTER AND A DIMMABLE SOLID-STATE LIGHTING DEVICE WITH THE POWER CONVERTER - The present invention is directed to a power converter, which receives a rectified voltage converted by a rectifier that is coupled to receive an output of a dimmer. The power converter generates a direct-current output voltage according to the rectified voltage in a non-isolated switching boost mode, and the generated direct-current output voltage is provided to at least one solid-state lighting element. | 02-21-2013 |
| 20130057172 | THREE LIGHT LEVEL ELECTRONIC BALLAST - A three light level electronic ballast, and methods of operating lamps at three light levels, are provided. The ballast includes a rectifier, a power factor correction circuit, an inverter circuit, a first circuit, a second circuit, and a control circuit. The rectifier receives an AC voltage signal and produces a rectified voltage signal, which the power factor correction circuit receives and uses to provide a corrected voltage signal. The inverter circuit receives the corrected voltage signal and provides an energizing signal to power at least two lamps. The first circuit selectively reduces the current applied to the lamps by the energizing signal. The second circuit selectively prevents the second lamp from being energized by the energizing signal. The control circuit controls the first circuit and the second circuit. | 03-07-2013 |
| 20130063038 | ILLUMINATION APPARATUS - An illumination apparatus including: a power supply circuit which outputs a DC power obtained by rectifying an AC voltage and stepping up the rectified voltage; a light source unit having semiconductor light emitting elements turned on by the DC power; and a housing formed of a conductive material that is grounded through a ground path and on which the power supply circuit and the light source unit are mounted. When one of power feed lines is cut off, the light emitting elements are supplied with an AC power from an AC power source through the ground path and a stray capacitance formed between the light source unit and the housing, and a forward voltage of the light emitting elements has a light emission level hardly recognizable. | 03-14-2013 |
| 20130069550 | Power Supply Device and Luminaire - According to one embodiment, a power supply device includes a rectifying circuit configured to rectify an alternating-current power supply and a power-supply-voltage converting section. The power-supply-voltage converting section includes a plurality of power-supply-voltage converting circuits provided between the rectifying circuit and a plurality of output sections to which loads are respectively connected. Switching elements configured to convert a power supply voltage rectified by the rectifying circuit and supply the power supply voltage to the loads are provided in the plurality of power-supply-voltage converting circuits. The switching elements of the plurality of power-supply-voltage converting circuits are set to at least two different switching frequencies and turned on and off with the respective switching frequencies fixed. | 03-21-2013 |
| 20130076256 | LIGHT STRING WITHOUT USING A CONTROL BOX - A light string has a plug, a tail socket and multiple LED lamps connected between the plug and the tail socket. The plug and tail socket respectively have a voltage converting circuit to commonly form a power converting circuit that converts AC voltage to DC voltage. The LED lamps include a primary LED lamp and multiple secondary LED lamps, wherein the primary LED lamp has a primary control chip for outputting control data to each LED lamp. According to the control data, the LED lamps are able to generate different lighting effects without using an additional control box. | 03-28-2013 |
| 20130076257 | SWITCHING MODE PULSED CURRENT SUPPLY FOR DRIVING LEDS - A method of switching a plurality of switches for supplying a pulsed current to one or more than one light-emitting diodes involves: switching a current from a direct current (DC) voltage to an inductance component, for example an inductor or a flyback transformer, for charging the inductance component; switching a current from the inductance component to the light-emitting diodes for transferring energy from the inductance component to the light-emitting diodes; switching a current from the inductance component to the direct current (DC) voltage for transferring energy from the inductance means back to the direct current (DC) voltage; controlling the switchings to regulate the current in the inductance component for supplying the pulsed current to the light-emitting diodes is disclosed. | 03-28-2013 |
| 20130082617 | CURRENT-SHUNTING ALTERNATING CURRENT LIGHT-EMITTING DIODE DRIVING CIRCUIT - A current-shunting AC LED driving circuit has a rectification unit, an LED unit, a voltage-controlled transistor, a shunt resistor, a current detection unit and a steady current control unit. The LED unit and the rectification unit constitute a power loop and acquire a pulsed DC power through the rectification unit. The voltage-controlled transistor and the current detection unit are serially connected to the power loop. The steady current control unit acquires an average loop current through the current detection unit to control the voltage-controlled transistor so that the LED unit can stably emit light. The shunt resistor is parallelly connected to the voltage-controlled transistor to constitute a current-shunting path to shunt the loop current flowing through the voltage-controlled transistor so as to reduce the power withstood by the voltage-controlled transistor. | 04-04-2013 |
| 20130088162 | ELECTRONIC CIRCUIT FOR DC CONVERSION OF FLUORESCENT LIGHTING BALLAST - Embodiments of an illumination device including LEDs for connection to an existing fluorescent lamp fixture including a conventional ballast described. One illumination device includes protection circuitry configured to protect the illumination device from the ballast current signal, a full-wave rectifier, a smoothing filter electrically coupled to the full wave rectifier, and a current regulator power circuit electrically coupled to the smoothing filter and the LEDS. The current regulator power circuit can include a first switching element configured to operate in response to a first (PWM) ON/OFF control signal; a current controller electrically coupled to a gate of the first switching element, the current controller configured to generate the first PWM control signal; and a current sense resistor electrically coupled to the first switching element and configured to sense the current through the LEDS, wherein the sensed current is fed back to the current controller. | 04-11-2013 |
| 20130099689 | Current Monitor for Indicating Condition of Attached Electrical Apparatus - A current monitor is described that indicates a condition of attached electrical equipment. The current monitor can determine a predetermined range in which current being withdrawn by the attached electrical apparatus lies. Based on the determined range, corresponding display electronic elements, such as light emitting diodes (LEDs), can be activated. Activated LEDs of a particular color can indicate corresponding conditions of the electrical equipment. For example, activation of green LEDs can indicate normal functioning of the electrical equipment, activation of one or more amber/yellow LEDs can indicate that lubrication of the electrical equipment is required soon, and activation of one or more red LEDs can indicate that lubrication of the electrical equipment is required and that the electrical equipment may not be used to avoid damage/failure due to overheating of the electronic circuitry associated with the electrical equipment. Related apparatus, systems, techniques and articles are also described. | 04-25-2013 |
| 20130106302 | LUMINANCE ADJUSTING CIRCUIT | 05-02-2013 |
| 20130119880 | 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. | 05-16-2013 |
| 20130127358 | LED POWER SOURCE WITH OVER-VOLTAGE PROTECTION - A resonant DC-DC converter used to drive an LED array includes a half-bridge converter configured to receive DC input power and produce a square wave voltage. A resonant tank circuit that includes an inductive element, a first resonance capacitor, and a second resonance capacitor, is coupled to the half-bridge converter to receive the square wave voltage such that a generally sinusoidal AC voltage is produced across the second resonance capacitor. An output transformer with a primary winding and one or more secondary windings, is coupled in parallel to the second resonance capacitor, and a clipping circuit is coupled to the primary winding such that the voltage across the primary winding does not substantially exceed the voltage of the DC input power. An output rectifier is coupled to the one or more secondary windings of the output transformer and is configured to produce a generally DC output voltage. | 05-23-2013 |
| 20130134891 | SYSTEMS AND METHODS FOR PROVIDING POWER AND DATA TO LIGHTING DEVICES - Systems and methods are provided for lighting systems, including high output lighting systems for various environments. The lighting systems include a lighting controller for driving lighting modules and transmitting a data signal to the lighting modules. The data signal varies between logical states. The lighting controller provides a low loss rectified power signal. The lighting controller further provides data within the power signal by forming a positive polarity rectified power waveform corresponding to data in a first state and a negative polarity rectified waveform signal corresponding to data in a second state using substantially loss-less circuitry. | 05-30-2013 |
| 20130147377 | DIRECTION INDICATION LAMP CONTROL DEVICE, DIRECTION INDICATION DEVICE, AND METHOD OF CONTROLLING DIRECTION INDICATION DEVICE - A direction indication lamp control device includes: a pulse signal generation unit that generates a pulse signal; a current control element having one end to which power supply voltage is supplied, a control terminal to which the pulse signal is supplied, and the other end which outputs a drive current, the other end of the current control element being connected to one end of an external direction indication switch, and the other end of the direction indication switch being connected to a direction indication lamp; and a leak detection unit that causes the pulse signal generation unit to decrease the amplitude of the pulse signal in a case where the drive current corresponding to a pulse wave of the pulse signal is equal to or less than a leak detection current value during a leak detection period. | 06-13-2013 |
| 20130154493 | DIMMING CONTROLLING CIRCUIT FOR LED - A dimming controlling circuit for LED includes: a switch configured to connect a main circuit and a power grid; a switch-on duration controlling circuit configured to output a switch-on duration controlling signals according to action times of the switch; a switch-off controlling circuit configured to output a switch-off controlling signal according to a comparison result of the voltages of the switch-on duration controlling signal and of a signal from a terminal of a switch transistor in the main circuit; a switch-on controlling circuit configured to generate a switch-on controlling signal after a first preset duration since receiving the switch-off controlling signal; and a logic unit configured to output a switch transistor controlling signal. | 06-20-2013 |
| 20130162156 | METHOD AND APPARATUS FOR CURRENT CONTROL WITH LED DRIVER - Aspects of the disclosure provide a circuit that includes a detection circuit and a controller. The detection circuit is configured to detect a starting of a conduction in a power supply provided via an electronic transformer. The controller is configured to control a current regulating circuit to pull a current from the electronic transformer at a pre-determined level during a time duration following the starting of the conduction, and pull the current at a reduced level according to a pre-determined profile after the time duration. | 06-27-2013 |
| 20130162157 | Switching Power Supply Device and Light-Emitting Diode Lighting Device - Implemented are a switching power supply device and a light-emitting diode lighting device in which a variation in load current can be suppressed against a wide range of variation in AC voltage. The configuration of the switching power supply device and the light-emitting diode lighting device includes: a rectifier unit which rectifies AC input voltage and outputs pulsating-current voltage; a power converting unit which receives the pulsating-current voltage and supplies a predetermined load current to a load; a current detecting unit which detects the load current; a drive control unit which controls the power converting unit to regulate the load current to a constant level; and an input voltage detecting unit which detects a variation in the AC input voltage. The drive control unit controls the power converting unit depending on the variation in the AC input voltage detected by the input voltage detecting unit. | 06-27-2013 |
| 20130162158 | Circuit Assembly and Method for Operating at Least one LED - Operating at least one LED on a circuit assembly having an input with first (E | 06-27-2013 |
| 20130169178 | LIGHT EMITTING DIODE CONTROL SYSTEM USING MODULATED SIGNALS - A light emitting diode control system includes a power conversion circuit, a control circuit, and a light emitting diode emission circuit. The control circuit is configured to modulate a data signal to a modulated signal. The light emitting diode emission circuit is electrically connected in series to the control circuit through a transmission line. The light emitting diode emission circuit is adapted to receive the modulated signal outputted from the control circuit. Moreover, the light emitting diode emission circuit includes an addressing unit. The type of the addressing unit could be a pin-selection type or a burning-code type. | 07-04-2013 |
| 20130169179 | LIGHT TUBE AND POWER SUPPLY CIRCUIT - A light tube for illumination by a power supply circuit includes a bulb portion and at least one end cap disposed on the bulb portion. A plurality of light emitting diodes is disposed inside the bulb portion for illuminating in response to electrical current to be received from the power supply circuit. The light emitting diodes are arranged in spaced-apart groupings. | 07-04-2013 |
| 20130175938 | LIGHT SOURCE APPARATUS - A light source apparatus is provided. The light source apparatus comprises an electric-conductive terminal, a control circuit, a first light source device, and a second light source device. The electric-conductive terminal defines a receiving space. The control circuit is disposed within the receiving space of the electric-conductive terminal and is electrically connected to the electric-conductive terminal. The first light source device and the second light source device are both electrically connected to the control circuit. When the control circuit detects a switching signal, the control circuit enables the first light source device to change from a first brightness to a second brightness and enables the second light source device to change from a third brightness to a fourth brightness. | 07-11-2013 |
| 20130181627 | DIMMABLE INSTANT START BALLAST - A ballast for dimming a lamp is provided. The ballast includes an inverter circuit for providing a lamp current for energizing the lamp and a dim interface for receiving an input indicative of a selected lighting level. A control circuit is connected to the dim interface for generating a pulse-width-modulated signal having a duty cycle corresponding to the selected lighting level. A switching network is connected to the control circuit for receiving the pulse-width-modulated signal. The switching network operates between a conductive state and a non-conductive state as a function of the pulse-width-modulated signal. An impedance device is connected across the switching network and is configured for connecting in series with the lamp so that the impedance device receives the lamp current when the switching network is operating in the non-conductive state and the lamp current bypasses the capacitor when the switching network is operating in the conductive state. | 07-18-2013 |
| 20130187559 | POWER SWITCH STRUCTURE WITH BOTH LIGHT EMISSION AND DC POWER CONVERSION FUNCTIONS - A power switch structure with both light emission and DC power conversion functions is electrically connected to an electric appliance and an AC power supply, and the power switch structure includes a casing, a converting module installed in the casing and electrically connected to the AC power supply for converting AC power into DC power, a control switch electrically connected to the electric appliance, the AC power supply and the converting module for switching a using status of the electric appliance, and switching to an output of the DC power according to the using status of the electric appliance, and a first light source module electrically connected to the control switch and driven by the DC power to emit light. | 07-25-2013 |
| 20130187560 | LIGHT SOURCE APPARATUS FOR DETECTING PATHOLOGICAL CHANGE IN AN ORAL CAVITY - A light source apparatus for detecting pathological change in an oral cavity has an LED unit and a control unit. The LED unit has multiple LEDs, and each LED has one of three primary colors. The control unit is electrically connected to the LED unit to adjust an operating voltage of each LED so that a spectral range of a light source mixed by the three primary colors of the LEDs is located in a range of x=0.349±0.0046, y=0.57495±0.00355 on the chromaticity coordinates. The light source apparatus can generate high chromatic aberration and high contrast between a normal area and an area with pathological change when emitting light to a diagnosed area in the oral cavity. | 07-25-2013 |
| 20130187561 | Circuit Arrangement for Operating at Least Two Semiconductor Light Sources - A circuit arrangement for operating at least two semiconductor light sources, having an electrical energy converter comprising at least one switch; at least two operating sections, each having a rectifier with an input terminal, output terminal and reference potential. Each rectifier contains a single rectifier diode. The operating sections are coupled to the electrical energy converter. At least one common mode choke is connected between the switch and the at least two rectifiers. At least two semiconductor light sources are each connected between the output terminal of the associated rectifier and the reference potential thereof. The converter is a resonant converter having a resonant cell. A resonant capacitor is connected in parallel with each of the switches encompassed by the converter topology and to each rectifier diode encompassed by the converter topology. The leakage inductance of the common mode choke is used as the resonant. | 07-25-2013 |
| 20130200813 | POST-MOUNTED LIGHT EMITTING DIODE (LED) DEVICE-BASED LAMP AND POWER SUPPLY FOR SAME - A post mounted lamp includes: a lamp post; one or more light emitting diode (LED) devices disposed proximate to the top of the lamp post; a power factor (PF) correction circuit disposed proximate to the bottom of the lamp post; wires disposed in the lamp post to deliver PF corrected electrical power from the PF correction circuit to the one or more LED devices; and circuitry disposed proximate to the top of the lamp post to operate the one or more LED devices using the PF corrected electrical power. | 08-08-2013 |
| 20130207562 | LED CENTRALIZED DC POWER SUPPLY SYSTEM AND OPERATING METHODS THEREOF - The invention provides a light emitting diode (LED) centralized DC (direct-current) power supply system and operating methods thereof. The proposed DC power supply system comprises a three-phase AC (alternating-current) input interface, a DC power supply output interface, N+1 three-phase PWM (pulse width modulation) rectifier modules, LED cluster loads and a power supply management module. The proposed operating methods are described as following: the power supply management module adjusts the duty ratio of the three-phase PWM rectifier modules, based on the control signals formed by synthesizing the information about voltage and current of the positive and negative output buses, the three-phase AC input ends, control signals and output of the three-phase PWM rectifier modules, hence AC voltage of power grid can be directly converted into adjustable DC voltage by the PWM rectifier. | 08-15-2013 |
| 20130214693 | LIGHT EMITTING COMPONENT AND LIGHT EMITTING DEVICE USING SAME - A light emitting device including a light emitting component is provided, wherein said light emitting comprising an integrated light emitting diode and a semiconductor field effect transistor. The semiconductor field effect transistor may prevent situations such as overheating and voltage instability by controlling a current passing through the light emitting diode as well as enhancing the ability to withstand electrostatic discharge and reducing cost of the light emitting device in multiple aspects. | 08-22-2013 |
| 20130221865 | DRIVER DEVICE AND DRIVING METHOD FOR DRIVING A LOAD, IN PARTICULAR AN LED UNIT - The present invention relates to a driver device ( | 08-29-2013 |
| 20130229123 | LIGHTING-DIMMING DEVICE CHOPPING POWER WAVEFORMS FOR ADJUSTING BRIGHTNESS - A lighting-dimming device has a dimming module with an encoding function and at least one light module with a decoding function and controlled by the dimming module. The dimming module is designated with a required brightness and address command by a user. A triode AC switch of the dimming module is controlled to chop a power based on the required brightness and address command. The chopped power is transmitted to the light module to control the brightness of the light module. In the chopped power, only a part of cycles of the power is chopped and most of the power waveforms are maintained. Therefore, a high power factor is maintained. | 09-05-2013 |
| 20130229124 | Dimmable Solid State Lighting System, Apparatus, and Article Of Manufacture Having Encoded Operational Parameters - Exemplary systems, methods, apparatuses and articles of manufacture for a distributed solid-state lighting system are disclosed. An exemplary article of manufacture comprises a plurality of machine-readable data fields optically encoding a plurality of operational parameters utilized in a system comprising a central power source, and one or more terminal lighting apparatuses. An exemplary central power source includes an optical scanner for input of the operational parameters, and a central controller to provide a first control signal to a DC/DC converter to provide a DC voltage level corresponding to a selected brightness level. A terminal lighting apparatus may comprise: a plurality of LEDs; a current (or power) source or regulator; and a terminal controller which, in response to the DC voltage level, provides a second control signal to the current source or regulator to provide a selected current level of the LEDs corresponding to the selected brightness level. | 09-05-2013 |
| 20130234614 | REPLACEABLE ELECTRICAL BALLAST TUBE - A replaceable electrical ballast tube is disclosed to be applied to a lamp holder with an electrical ballast. The tube includes a capacitor, a rectifier, a current limiting unit and a light-emitting module. The capacitor is connected in parallel with the electrical ballast to filter an AC voltage generated by the electrical ballast with high frequency and high voltage. The rectifier is connected in parallel with the capacitor to rectify the AC voltage to a DC voltage. The current limiting unit converts the DC voltage to a corresponding DC current. The DC current is provided to the light-emitting module to generate light. Accordingly, the tube can be directly used in the lamp holder of a traditional fluorescent lamp without changing the wiring of the lamp holder. | 09-12-2013 |
| 20130234615 | High Power Dimmer and Dimming System Having Switchable Power Modes, Dimming Device and Method for Transmitting Power and Dimming Commands - A dimming system is composed of a dimmer having switchable power modes and at least one lighting device. When the dimmer is in a non-dimming bypass mode, an input power is directly transmitted to the at least one lighting device with the dimmer being bypassed so that the circuit in the dimmer consumes no power. When the dimmer is in a dimming mode, an output selector of the dimmer outputs a dimming output power having a dimming command therein to each one of the at least one lighting device for each lighting device to decode the dimming command embedded in the dimming output power and perform a dimming operation according to the dimming command. As the dimming operation lasts briefly, the power consumed by the dimmer is extremely small. Accordingly, no heat dissipation issue arises and the present invention is applicable to all sorts of high power lighting devices. | 09-12-2013 |
| 20130249423 | CASCODED CURRENT REGULATOR - A cascoded current regulator, including: a first load circuit, having a first load and a current source unit; and a second load circuit, being cascaded with the first load circuit and having a second load and a current mirror unit, wherein a first current flowing through the first load and a second current flowing through the current source unit are controlled by a control voltage, and a third current flowing through the second load and a fourth current flowing through the current mirror unit are generated according to the second current. | 09-26-2013 |
| 20130249424 | LIGHT EMITTING DIODE DRIVING APPARATUS - There is provided a light emitting diode driving apparatus capable of uniformly controlling current balance between light emitting diode channels. The light emitting diode driving apparatus includes: an AC to DC converting unit converting input AC power into a preset DC driving power; a detecting unit detecting voltage drops generated in a plurality of respective light emitting diode channels each having a plurality of light emitting diodes performing a light emitting operation by receiving the DC driving power; a converting unit converting analog values detected from the detecting unit into digital values; and a driving unit differentially setting switching signal duty cycles in which a driving current is allowed to flow in the plurality of respective light emitting diode channels according to the digital values from the converting unit to drive the plurality of light emitting diode channels. | 09-26-2013 |
| 20130249425 | DRIVING LIGHT EMITTING CIRCUIT - A light emitting circuit is provided. The light emitting circuit may include a first light emitting diode (LED) group to which LEDs are connected, and a second LED group to which LEDs are connected. A resistive load is serially connected to the first LED group to control a current with respect to the first LED group, and a capacitive load is serially connected to the second LED group to control a current with respect to the second LED group. | 09-26-2013 |
| 20130249426 | LINEAR DRIVER FOR REDUCED PERCEIVED LIGHT FLICKER | 09-26-2013 |
| 20130257303 | Lighting Control Circuit and Illumination Control Device - According to one embodiment, a lighting control circuit includes a rectifying device configured to rectify an output of an alternating constant-current power supply device capable of changing an output current value, a power converting section configured to receive an output of the rectifying device and variably output direct-current power, and a solid-state light-emitting element supplied with the output of the power converting section to be lit. A shunting device configured to shunt a part of an output current from the alternating constant-current power supply is provided on an input side of the rectifying device. | 10-03-2013 |
| 20130264960 | LIGHT EMITTING DIODE DRIVING APPARATUS - A light emitting diode (LED) driving apparatus is disclosed. The LED driving apparatus includes a rectifier for rectifying an alternating current (AC) voltage to supply a ripple voltage, a light emitting unit partitioned into two or more groups, each of the groups including a plurality of LEDs, and a driving controller for selectively driving one or more of the groups of the light emitting unit depending on a level of the ripple voltage, the driving controller driving at least one of the groups of the light emitting unit using current discharged from a capacitor connected with the at least one group when the ripple voltage is lower than an operating voltage of the light emitting unit. | 10-10-2013 |
| 20130264961 | Transmitting And Receiving Digital And Analog Signals Across An Isolator - Various embodiments of systems for transmitting and receiving digital and Various embodiments of systems for transmitting and receiving digital and/or analog signals across a single isolator, solid state lighting systems, or DC/DC converter feedback regulation control systems are disclosed. In one embodiment, the digital and analog signals may be modulated into a frequency modulated signal, and each pulse of the frequency modulated signal may be further encoded into a major pulse and a minor pulse. At least some of the circuits, systems and methods disclosed herein may be implemented using conventional CMOS design and manufacturing techniques and processes to provide, for example, a single integrated circuit or ASIC. | 10-10-2013 |
| 20130278162 | LED BULB FOR GENERAL AND LOW INTENSITY LIGHT - A bimodal light emitting diode (LED) light bulb, method, and system having a form factor compatible with industry standard light bulb sockets provides general lighting when power is received via one or more light bulb electrical contacts, then as a different luminosity when power is removed from the contacts. A first subset of LEDs is powerable via the contacts for general light, while a second subset of LEDs is powerable via an energy storage device. Both subsets of LEDs are packaged in a replaceable light bulb. The energy storage device may comprise a capacitor or battery which may be charged when power is supplied via the contacts. In one embodiment, power to LEDs is controlled by a timer, motion sensor, light sensor, sound sensor, dimmer, voltage sensor, or manual switch. In another embodiment, an ambience generator emits fragrance or background sound. In another embodiment, LEDs are individually replaceable. | 10-24-2013 |
| 20130278163 | SYSTEM AND METHOD FOR CONTROLLING LED SEGMENTS TO PROVIDE LIGHTING EFFECTS - A single board light engine includes an AC to AC step driver that selectively powers multiple LED segments by controlling tap points between the LED segments as the input voltage goes from zero crossover to maximum voltage and returns to zero crossover. The step driver may power a first LED segment, a second LED segment, both the first and second LED segments, or none of the LED segments depending upon the input voltage level. The LEDs within an LED segment may share a characteristic that differs from a characteristic shared by LEDs in another segment, which allows the LED fixture to provide a variety of lighting effects. | 10-24-2013 |
| 20130278164 | LIGHT FIXTURE REMOTE CONTROLLING SYSTEM - A light fixture remote controlling system comprises a remote host and at least one light fixture; wherein the remote host has a monitoring software, electrically connected with a first wireless transmitting/receiving module and a first power amplifying module; each light fixture is provided in the body thereof with an AC-DC converter for a connection with a power source, a photoelectric module, and a controlling circuit electrically connected between the AC-DC converter and the photoelectric module, respectively; wherein the controlling circuit is integrated with: a dimming module; a current/voltage stabilizing module; a second wireless transmitting/receiving module; a voltage/current detecting module; a second power amplifying module; and a signal processing module. | 10-24-2013 |
| 20130293132 | INTERFERENCE-FREE LIGHT-EMITTING MEANS CONTROL - An operating device ( | 11-07-2013 |
| 20130300304 | Intelligent User Interface Including A Touch Sensor Device - The present invention, according to a preferred embodiment, is directed to portable electronic devices which operate on exhaustible power sources, for example, batteries. The electronic devices of the present invention comprise at least one signal switch and a microchip in communication with the switch wherein the switch is only capable of transmitting a signal to the microchip that the switch has been activated or deactivated. The microchip is in communication with the exhaustible power source of the electronic device and controls (i) the power on/off function of the device, (ii) at least one other function of the device in response to activation and deactivation signals from the switch, and (iii) an automatic shut off function in response to the receipt of an activation signal from the switch. | 11-14-2013 |
| 20130307427 | CURRENT BALANCING LED DRIVER CIRCUIT AND METHOD THEROF - A light emitting diode current-balancing driving circuit is provided. In accordance with the first aspect of the present invention, a light emitting diode current-balancing driving circuit is provided. The light emitting diode current-balancing driving circuit includes a plurality of rectifiers; a current-balancing circuit having a plurality of capacitors respectively coupled to the plurality of rectifiers; and a plurality of diodes electrically connected to the plurality of rectifiers respectively. | 11-21-2013 |
| 20130307428 | DRIVER DEVICE AND DRIVING METHOD FOR DRIVING A LOAD, IN PARTICULAR AN LED UNIT - The present invention relates to a driver device ( | 11-21-2013 |
| 20130313990 | DISPLAY AND LIGHT SOURCE - A device includes a light emitting diode (LED) module and a switch. The switch further includes a first contact grounded through a first resistor, a second contact grounded through a second resistor, and a fixed contact connecting to the LED module. When the fixed contact is connected to the first contact and the first resistor, the device is operated as a display device and the LED module is operated as a backlight source for the display device. When the fixed contact is connected to the second contact and the second resistor, the LED module is operated as a light source. | 11-28-2013 |
| 20130313991 | FLICKER-FREE LINEAR LED DRIVER CIRCUIT WITH HIGH POWER FACTOR - The flicker-free linear LED driver circuit with high power factor has a rectifier unit, an LED unit, a constant current unit, a storage capacitor and a voltage controlled transistor; the rectifier unit is connected to an AC power and converts the AC power into a pulsating DC power; the LED unit is connected to the rectifier unit and has multiple LED sources; the constant current unit is connected in series with the LED unit to form a first power circuit; wherein current flowing in the LED unit is fixed to a constant value by the constant current unit; the storage capacitor is connected to the rectifier unit; the voltage controlled transistor is connected in series with the storage capacitor to form a second power circuit; wherein the voltage controlled transistor limits current flowing in the storage capacitor under a maximum current limit value. | 11-28-2013 |
| 20130320872 | LIGHT-EMITTING DIODE DRIVING CIRCUIT - A light-emitting diode (LED) driving circuit includes a power factor correction (PFC) circuit and a driving controller. The PFC circuit controls a power factor of the LED driving circuit. The LED driving circuit includes an inductor, a switch, a current detection circuit, and a time detection circuit. The inductor senses an inductor current and provide energy to at least one LED. The switch connected to the inductor is conducted according to a driving signal. The current detection circuit connected to the switch detects inductor current information. The time detection circuit connected to the switch detects an energy discharging time during which the inductor current decrease from a peak value to zero. The driving controller connected to the switch, the current detection circuit, and the time detection circuit outputs the driving signal to the switch according to the voltage level and the energy discharging time. | 12-05-2013 |
| 20130328493 | SWITCHABLE LUMINANCE LED LIGHT BULB - A switchable luminance LED light bulb, including embodiments that may be used with any common commercial fitting. | 12-12-2013 |
| 20140001973 | LIGHT EMITTING DIODE DRIVING APPARATUS | 01-02-2014 |
| 20140001974 | LIGHTING SYSTEM AND ITS LUMINARIES WITH A RESPECTIVE LAMP CONTROL MODULE | 01-02-2014 |
| 20140015431 | ILLUMINATION APPARATUS AND METHOD - An illumination apparatus is described which comprises a solid state light emitting device and means for powering the light emitting device. The powering means is adapted to provide a series of pulses, wherein each pulse comprises a substantially square waveform followed by a decaying oscillating waveform. | 01-16-2014 |
| 20140021877 | LIGHT EMITTING CHIP AND LIGHT EMITTING DEVICE HAVING THE SAME - A light emitting chip operating under a DC power supply is provided. The light emitting chip includes a substrate and a plurality of light emitting elements. The light emitting elements are arranged on the substrate, and have the same or different area sizes. The light emitting elements are driven by a single driving voltage or sectionally driven by a plurality of driving voltages. | 01-23-2014 |
| 20140021878 | Buck Converter for Operating at Least One LED - A buck converter for operating at least one LED. In this case, the buck inductor comprises a first buck inductor and a second buck inductor, wherein a charge pump is coupled between the coupling point of the two buck inductors and a supply connection of a control apparatus which is used for actuating a buck switch. | 01-23-2014 |
| 20140028212 | CONSTANT CURRENT LED DRIVER - The LED driver includes a rectifier, a switching circuit and a feedback circuit. The rectifier connects an AC power source and outputting DC power. The switching circuit connects the DC power of the rectifier to switch the DC power with pulse width modulation (PWM) and has an output end for connecting a load and a feedback control end. The feedback circuit is connected between the output end and the feedback control end of the switching circuit for controlling a duty cycle of the switching circuit depending on an output current of the output end to keep the output current constant. | 01-30-2014 |
| 20140035476 | LIGHT EMITTING DIODE DRIVING APPARATUS - There is provided a light emitting diode driving apparatus capable of supplying a constant average current to a light emitting diode by generating a reference voltage used for driving the light emitting diode according to input power and a switching signal switching a path of a current supplied to the light emitting diode. The light emitting diode driving apparatus includes: a reference voltage generating unit generating a reference voltage set based on input power and a switching signal for supplying driving power to a light emitting diode; and a driving unit supplying the driving power to the light emitting diode according to the reference voltage. | 02-06-2014 |
| 20140035477 | SINGLE STAGE FORWARD-FLYBACK CONVERTER AND POWER SUPPLY APPARATUS - There are provided a single stage forward-flyback converter, and a power supply apparatus capable of increasing power factor correction and power conversion efficiency. The single stage forward-flyback converter includes: a forward converter unit including a transformer having a primary winding receiving input power and a first secondary winding magnetically coupled to the primary winding to receive power induced thereto, and converting the power in a forward scheme; and a flyback converter unit sharing the transformer, including a second secondary winding, and converting the power in a flyback scheme, wherein the forward converter unit is selectively operated according to a voltage level of the input power. | 02-06-2014 |
| 20140042922 | LIGHT EMITTING DIODE DRIVING DEVICE - A LED driving device comprises a rectification circuit, a holding current circuit and a driving circuit to drive and linearly regulates an illumination brightness of at least one LED by utilizing level variation of current magnitude. The rectification circuit rectifies and outputs a rectified voltage to the holding current circuit and the driving circuit by filtering impulses via a filter after receiving an alternating current voltage. The driving circuit outputs a driving current filtered by a filter capacitor to the LED, and the driving current is sensed by a sensing resistor to allow the holding current circuit outputttng a holding current to the rectification circuit such that the whole circuit power can be improved to reduce problems of noise interference and twinkling. | 02-13-2014 |
| 20140042923 | AIRFIELD LIGHTING SYSTEM - An airfield lighting system is provided, the system including a constant current regulator configured to output a constant current, a plurality of insulating transformers configured to be electrically connected to the constant current regulator to supply an electric power, and a plurality of individual lighting devices each electrically connected to the insulating transformer to turn on or turn off an LED lamp, wherein the individual lighting apparatus includes an LED unit including an ADC (AC-DC Converter) and at least one LED lamp connected to a secondary side of the ADC and transmitting defect information of the LED lamp, and a defect information receiver configured to measure a current and a voltage at a primary side of the ADC, measure an electric energy (electricity) or a resistance value using the measured current and voltage, and generate status information of the LED unit. | 02-13-2014 |
| 20140055053 | LED CONTROL CIRCUIT WITH AUTO ON/OFF FUNCTION - An LED control circuit with auto ON/OFF function has a power module, a control module, a timer module, a driver module and an LED module with a first LED unit and a second LED unit. The control module generates a time control signal and an LED control signal to respectively activate the timer module and the LED module. The LED module is activated by the LED control signal only when the timer module is turned ON. The timer module can be automatically turned ON/OFF by the time control signal. Moreover, the LED control signal has high potentials and low potentials. The driver module activates the first LED unit and the second LED unit based on two the different potentials of the LED control signal respectively. Both high and low potentials of the LED control are used. The performance of the LED module is improved. | 02-27-2014 |
| 20140077715 | SYSTEM CONTROL UNIT, LED DRIVER INCLUDING THE SYSTEM CONTROL UNIT, AND METHOD OF CONTROLLING STATIC CURRENT OF THE LED DRIVER - Embodiments of the present invention provide a light-emitting diode (LED) driver for controlling a static current supplied to an LED array connected to a secondary coil of a transformer by using the peak values of currents flowing through a power transistor, which may reside in a switching element connected to a primary coil of the transformer. In some embodiments, the LED driver is configured to control the static current that flows through the LED array using an AC voltage supplied to the primary side of the transformer. In some embodiments, the LED driver includes a power conversion unit, a switching unit, a transformer, and a system control unit. In some embodiments, the method of controlling the static current of the LED driver includes a current peak value detection step, a step output current calculation step, a static current mean value calculation step, and a gate control signal update step. | 03-20-2014 |
| 20140084801 | ACTIVE CURRENT LIMITING FOR LIGHTING APPARATUS - A lighting apparatus, such as an LED lighting apparatus, includes at least one light-emitting device, a rectifier circuit having an input configured to be coupled to an AC source, and a driver circuit coupled to an output of the rectifier circuit and to the at least one light emitting device. The apparatus further includes an active current limiter circuit coupled to the output of the rectifier circuit and configured to limit a current provided to the driver circuit, such as a current drawn by an EMI filter of the driver circuit, which may cause erratic operation of a dimmer controlling the lighting apparatus. | 03-27-2014 |
| 20140084802 | CURRENT SOURCE HAVING AN IMPROVED DIMMING DEVICE - The invention relates to a dimmable, multi-channel voltage/current source ( | 03-27-2014 |
| 20140091724 | SOLID STATE LIGHT SOURCE DRIVER ESTABLISHING BUCK OR BOOST OPERATION - A solid state light source driver circuit that operates in either a buck convertor or a boost convertor configuration is provided. The driver circuit includes a controller, a boost switch circuit and a buck switch circuit, each coupled to the controller, and a feedback circuit, coupled to the light source. The feedback circuit provides feedback to the controller, representing a DC output of the driver circuit. The controller controls the boost switch circuit and the buck switch circuit in response to the feedback signal, to regulate current to the light source. The controller places the driver circuit in its boost converter configuration when the DC output is less than a rectified AC voltage coupled to the driver circuit at an input node. The controller places the driver circuit in its buck converter configuration when the DC output is greater than the rectified AC voltage at the input node. | 04-03-2014 |
| 20140103828 | METHODS AND CIRCUITS FOR SUPPLYING A PULSED CURRENT TO LEDS - Methods and circuits for driving one or more than one light-emitting diodes with a pulsed current are disclosed. | 04-17-2014 |
| 20140103829 | FEED FORWARD IMBALANCE CORRECTOR CIRCUIT - A circuit includes an input to be coupled to receive a rectified line voltage having a controlled conduction phase angle in each half line cycle. An active device is coupled to a feedback terminal of a controller. The feedback terminal is coupled to receive a feedback signal representative of an output of a power supply. The active device includes a control terminal coupled to receive a signal representative of the input. The active device is coupled to adjust the feedback signal on the feedback terminal in response to the control of the conduction phase angle of the rectified line voltage in each half line cycle. | 04-17-2014 |
| 20140117866 | Apparatus and method of operation of a low-current LED lighting circuit - An apparatus and method of operation of a low-current LED lighting circuit are disclosed. The invention utilizes high AC voltage input and unreduced voltage ripple component of the rectified DC power signal, which provides the ability to drive an LED load at high power factor at low current. The invention discloses both active and passive circuits to limit the peak current flowing to the LED and create a current source for the LED load. The proposed circuit increases reliability by optionally eliminating capacitor, inductor, and heatsink components while minimizing luminous flux fluctuations. | 05-01-2014 |
| 20140117867 | DRIVER DEVICE AND DRIVING METHOD FOR DRIVING A LOAD, IN PARTICULAR AN LED UNIT - The present invention relates to a driver device ( | 05-01-2014 |
| 20140117868 | SINGLE SWITCH DRIVER DEVICE HAVING LC FILTER, FOR DRIVING A LOAD, IN PARTICULAR AN LED UNIT - The present invention relates to a driver device ( | 05-01-2014 |
| 20140125242 | ILLUMINATION SYSTEM - There is provided an illumination system including a driving device including a rectifier configured to receive alternating current (AC) power from an external power source, rectify the AC power, and output rectified power, and a constant current driver configured to receive the rectified power from the rectifier and output constant current; a light emitting device including at least one light emitting diode (LED) driven with the constant current of the driving device, and a forward direction current transmitter configured to control the constant current of the driving device to be applied to the LED in a forward direction; and a detachable electrical connector connecting the driving device and the light emitting device to one another. | 05-08-2014 |
| 20140132169 | CONTROLLED CONVERTER ARCHITECTURE WITH PRIORITIZED ELECTRICITY SUPPLY - The present invention relates to a power converter architecture and its operation principle that supplies an electric load with a controlled direct voltage from both a local direct current electricity source as well as an alternating current (AC) mains with maximum power conversion efficiency. For the case that the local electricity source can not provide enough electricity to the local load it is additionally supplied with electricity from the AC mains. In other case electricity is also feed into the AC grid when a local source can provide more electricity than needed to supply local loads. | 05-15-2014 |
| 20140139127 | ELECTRONIC BALLAST WITH REAL-TIME CURRENT CREST FACTOR IMPROVEMENT FUNCTION - An electronic ballast includes a converter, an inverter circuit, a controlling unit, and a current crest factor improvement circuit. The controlling unit issues a first control signal to control the converter and issues a second control signal and a third control signal with opposite enabling/disabling states to control on/off states of corresponding switch elements of the inverter circuit. During a dead time between the enabling state of second control signal and the enabling state of the third control signal, these switch elements are simultaneously in the off state. During the dead time, the current crest factor improvement circuit is triggered to generate a restraining signal. According to the restraining signal, an output power of the converter is decreased to a predetermined value in real time or the converter is suspended. | 05-22-2014 |
| 20140145634 | CIRCUIT AND METHOD FOR GENERATING A REFERENCE VOLTAGE FOR A POWER CONVERTER - Circuits and methods for generating a reference voltage for a power converter control are disclosed herein. The power converter control providing a signal on an output for aligning the voltage and current on a power line so that they are in phase. An embodiment of a circuit includes a voltage detector that detects the voltage on the power line. A signal generator generates a wave that is in phase with voltage on the power line, the wave being generated independent of the voltage on the power line. The output of the signal generator is the reference voltage. | 05-29-2014 |
| 20140159607 | LIGHTING APPARATUS AND CONTROL CIRCUIT - A lighting apparatus includes a first LED unit and a second LED unit configured to provide different color temperatures. A pulse/voltage conversion circuit is connected between a power supply line and a low-potential side reference line, and configured to convert the pulses of input electric power into a voltage. A voltage dividing circuit is connected between the output terminal of the pulse/voltage conversion circuit and the low-potential side reference line, and configured to divide the voltage converted by the pulse/voltage conversion circuit. The dividing node of the voltage dividing circuit and the low-potential side terminal of the second LED unit are connected. | 06-12-2014 |
| 20140203721 | ACTIVE DAMPING FOR DIMMABLE DRIVER FOR LIGHTING UNIT - A circuit ( | 07-24-2014 |
| 20140203722 | AC LED LIGHTING APPARATUS USING VOLTAGE EDGE DETECTOR - An AC LED lighting apparatus using a voltage edge detector is provided. The AC LED lighting apparatus includes: a rectification unit configured to rectify an AC voltage to output a DC rectified voltage; an LED unit including a first light emitting group and a second light emitting group each including at least one LED; and an LED driving control unit configured to control a serial/parallel connection relationship between the first light emitting group and the second light emitting group by comparing a voltage level of the rectified voltage input from the rectification unit with a reference voltage. The LED driving control unit sets the reference voltage by detecting a slope of the rectified voltage and simultaneously detecting the voltage level of the rectified voltage and the detected slope of the rectified voltage. | 07-24-2014 |
| 20140239832 | Power Conversion Apparatus and System for Solid State Lighting - Exemplary embodiments provide for power conversion for solid state lighting coupled to a first switch, such as a dimmer switch. An exemplary apparatus includes a switching power supply and a first adaptive interface circuit. The first adaptive interface circuit may include a resistive impedance coupled in series to a reactive impedance. The apparatus may also include a second adaptive interface circuit including a second switch coupled to the reactive impedance. The second adaptive interface circuit is configured to conduct current from the first switch in a second current path. At least one of the first and second adaptive interface circuits may be configured to damp oscillation when the first switch turns on. | 08-28-2014 |
| 20140239833 | 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. | 08-28-2014 |
| 20140246986 | LED LIGHTING SYSTEM - A DC-powered LED lighting device and a lighting system using such devices are disclosed. A common AC/DC power supply is coupled to at least one electric main and provides power to the LED lighting devices at DC voltages that are higher than the peak voltage of the sine wave of the at least one electric main. | 09-04-2014 |
| 20140265902 | LED CONTROL APPARATUS - The present invention provides an LED control apparatus for controlling a color temperature of at least one LED light module, and the LED control apparatus comprises an LED driver electrically connected to the LED light modules; a power conversion module; and a microcontroller unit electrically connected to the power conversion module to control a current output ratio of the LED driver; the microcontroller unit comprises a first control point connected to the LED driver and second and third control points connected to the LED modules; wherein the second and third control points are electrically connected to current controllers for controlling a current therethrough. By using the microcontroller connected to the LED driver to control the current outputs to the LED light modules, the current ratio of the LED light modules can be effectively controlled in order to change the color temperatures of the LED light modules. | 09-18-2014 |
| 20140265903 | LIGHT-EMITTING DEVICE PACKAGE AND LIGHT-EMITTING APPARATUS - A light-emitting device package including: a package substrate; first to fifth conductive patterns disposed on a top surface of the package substrate; a first rectifying circuit disposed on the first and second conductive patterns; a first light-emitting device disposed on the fifth conductive pattern and electrically connected to the first rectifying circuit; a second rectifying circuit disposed on the third and fourth conductive patterns; and a second light-emitting device disposed on the fifth conductive pattern and electrically connected to the second rectifying circuit. | 09-18-2014 |
| 20140285102 | HIGH POWER FACTOR, ELECTROLYTIC CAPACITOR-LESS DRIVER CIRCUIT FOR LIGHT-EMITTING DIODE LAMPS - A driver circuit for use with LED lamps. The driver circuit uses a rectifier, a power factor correction subcircuit, a voltage conversion subcircuit, and a semiconductor switch. The power factor correction subcircuit uses a film capacitor instead of an electrolytic capacitor. As well, the power factor correction subcircuit uses either an inductor or a transformer to shape the incoming current to a substantially sinusoidal waveform that is in phase with the input AC current. The semiconductor switch provides a high frequency pulsating triangular current at the output of the rectifier. | 09-25-2014 |
| 20140306615 | LED LIGHTING DEVICE USING BALLAST - An LED lighting device includes: an LED unit which includes at least one LED device; and a rectifier which rectifies a current power signal output from the ballast and transfers the rectified current power signal to the LED unit. When the ballast is a low-frequency ballast having an output frequency less than 60 Hz, the rectifier opens between a main path for supplying power to the rectifier from the ballast and an auxiliary path for preheating a starter or filament of the ballast. When the ballast is a high-frequency ballast having the output frequency greater than 20 kHz, the rectifier short-circuits between the main path for supplying the power to the rectifier from the ballast and the auxiliary path for preheating the filament of the ballast. | 10-16-2014 |
| 20140320034 | Luminaire - According to an embodiment, there is provided a luminaire including a light-emitting unit and a cap. The luminaire is attached to a socket including first and second sections to be fit. The light-emitting unit includes a first terminal, a second terminal, and a light-emitting element electrically connected between the first terminal and the second terminal. The light-emitting element is lit if a voltage between the first terminal and the second terminal is equal to or larger than a predetermined value. The cap includes first and second fitting sections. The first and second fitting sections are fit in the first and second sections to be fit of the socket to apply a voltage input from the outside between the first terminal and the second terminal. The predetermined value is equal to or larger than 18.7 V and equal to or smaller than 120 V. | 10-30-2014 |
| 20140327368 | 3-WAY LED BULB - A lighting circuit for a light emitting diode (LED) bulb capable of operating at different light output levels depending on received AC power includes a first group of LEDs and second group of LEDs, each of which is configured to emit light as a group. The lighting circuit also includes an AC/DC converter electrically connected to the first and second groups of LEDs. A detector circuit detects received AC power. A selection circuit is operable to cause the AC/DC converter circuit to provide current into one configuration of LEDs from the group of configurations of LEDs consisting of: the first group of LEDs only, the second group of LEDs only, and the first and second group of LEDs. The configuration of LEDs to provide current to is selected based on received AC power. | 11-06-2014 |
| 20140333222 | METHODS, SYSTEMS, AND APPARATUS FOR PROVIDING VARIABLE ILLUMINATION - Digital Control Ready (DCR) is a two-way open standard for controlling and managing next-generation fixtures. A DCR-enabled lighting fixture responds to digital control signals from a separate digital light agent (DLA) instead of analog dimming signals, eliminating the need for digital-to-analog signal conditioning, fixture-to-fixture variations in response, and calibration specific to each fixture. In addition, a DCR-enabled lighting fixture may also report its power consumption, measured light output, measured color temperature, temperature, and/or other operating parameters to the DLA via the same bidirectional data link that carries the digital control signals to the fixture. The DLA processes these signals in a feedback loop to implement more precise lighting control. The DCR-enabled lighting fixture also transforms AC power to DC power and supplies (and measures) DC power to the DLA via a DCR interface. These features enable intelligent, networked DCR lighting systems operate with lower power (energy) consumption, greater flexibility, and simpler installation than other intelligent lighting networks. | 11-13-2014 |
| 20140339996 | BALLAST AND BALLAST CONTROL METHOD AND APPARATUS, FOR EXAMPLE ANTI-ARCING CONTROL FOR ELECTRONIC BALLAST - A technique for providing control for an electronic ballast by responding to the current in the common bus (DC power rail) betweeen a boost circuit such as a power factor circuit (PFC) and an output (such as a high frequency (HF) inverter) circuit, and adjusting, changing or shutting down either the power factor control circuit or the inverter circuit when the power going into the inverter circuit is above a threshold. Power going into the inverter circuit may be measured by a resistor, and temperature compensation may be provided. Excess power indicative of a spark is detected in such a way that normal starting of a lamp load connected to the ballast occurs without triggering the change/shutdown but an external arc will trigger the change/shutdown. For example, the output circuit may be shut down and the external arc curtailed within 200 msecs. | 11-20-2014 |
| 20140346966 | LIGHTING DEVICE - A lighting device includes a switch element coupled to a power source; a bridge current rectifying unit in communication with the switch element for converting alternating current received from the power source into direct current; a driving and light-emitting module in communication with the bridge current rectifying unit; and a counting and control unit in communication with the switch element and the driving and light-emitting module. The counting and control unit counts a switching number of the switch element, and selectively outputs one or both of a first enable signal and a second enable signal to the driving and light-emitting module to emit light of a selected feature according to the switching number of the switch element. | 11-27-2014 |
| 20140354166 | DIMMING CIRCUIT AND METHOD FOR LEDS - The present disclosure relates to dimming circuit and method for LEDs. The dimming circuit obtains a DC voltage from an external AC power supply by using a TRIAC, an electronic transformer, and a rectifier bridge sequentially. The dimming circuit comprises a first power stage circuit, a second power stage, a first control circuit, and a second control circuit. The first power stage circuit has an input terminal configured to receive the DC voltage. The second power stage has an input terminal coupled to an output terminal of the first power stage and an output terminal coupled to an LED load. The first control circuit is configured to generate a first control signal in accordance with a first output voltage generated at the output terminal of the first power stage circuit, a first reference voltage and an upper threshold voltage to maintain an average value of the first output voltage to be consistent with the first reference voltage. The second control circuit is configured to generate a dimming signal in accordance with a first current and the first output voltage to control an operation of the second power stage circuit to maintain an output current of the second power stage circuit to be consistent with an expected driving current represented by the dimming signal. The first current is no less than a holding current of the electronic transformer. An input current of the first power stage circuit is maintained to be consistent with the first current by the first control signal when the first output voltage is in a continuously increasing state and is lower than the upper threshold voltage. The first output voltage decreases continuously and the input current is maintained to be consistent with a second current after the first output voltage reaches the upper threshold voltage. | 12-04-2014 |
| 20140368120 | BALLAST WITH ANTI-STRIATION CIRCUIT - A ballast comprises an inverter circuit for providing an oscillating current signal for energizing the at least one lamp. The inverter circuit comprises a first switching component and a second switching component each having a collector terminal, a base terminal, and an emitter terminal. And, each switching component is configured for alternately operating between a conductive state and a non-conductive state. A first collector-emitter circuit is connected between the collector terminal and the emitter terminal of the first switching component, wherein the first collector-emitter circuit has a first resistance of zero or more Ohms. A second collector-emitter circuit is connected between the collector terminal and the emitter terminal of the second switching component, wherein the second collector-emitter circuit has a second resistance of zero or more Ohms and the first resistance and the second resistance are unequal. | 12-18-2014 |
| 20150028759 | LED Lighting System Based on a Multiple-output Constant Current LED Driver - An LED lighting system includes a multiple output constant current LED driver and a plurality of LED arrays. The LED driver has AC/DC converter, PFC circuit, DC/DC converter and a plurality of DC/DC modules. The PFC circuit is connected to AC/DC converter, the DC/DC converter is connected to the PFC circuit, and the DC/DC modules are connected to DC/DC converter. The LED arrays are connected to DC/DC modules. | 01-29-2015 |
| 20150028760 | LED LUMINAIRE - A light-emitting diode (LED) luminaire includes a light-emitting part, a rectification unit configured to perform full-wave rectification of an alternating current (AC) voltage to supply a first drive voltage to the light-emitting part, a power factor compensation unit configured to be charged with the first drive voltage during a charge period and supply a second drive voltage to the light-emitting part during a compensation period, and an LED drive controller configured to determine a voltage level of the first drive voltage or the second drive voltage and control sequential driving of the first LED group to the n | 01-29-2015 |
| 20150028761 | TRANSFORMER FOR A LAMP, LED CONVERTER, AND TRANSFORMER OPERATION METHOD - A galvanically isolated transformer ( | 01-29-2015 |
| 20150048751 | Bi-level dimming controller for led light fixture - A bi-level dimming control circuit is disclosed. The bi-level dimming control circuit is electrically coupled between two switches and a driver circuit that is compatible with 0 to 10 volt dimming signals. The bi-level dimming control circuit controls the output from the driver circuit based on the on and off positions of the switches. In repose to the on and off positions of the switches the driver circuit powers a light engine between a maximum light output mode, a zero light output mode and a reduced or dimmed light output mode. The bi-level control circuit is used to modulate LED light engines, fluorescent light engines and combinations thereof. | 02-19-2015 |
| 20150054417 | LED DRIVING DEVICE AND LIGHTING DEVICE - The disclosed implementations include a light emitting diode (LED) driving device including a DC-DC converter generating a driving signal with respect to a plurality of LEDs, a rectifying unit rectifying an alternating current (AC) signal to generate a direct current (DC) signal, a power factor correction (PFC) converter connected to the rectifying unit, and a controller detecting an output from the DC-DC converter and an output from the PFC converter to determine input impedance of the PFC converter. | 02-26-2015 |
| 20150061525 | ILLUMINATION APPARATUS AUTOMATICALLY ADJUSTED WITH TIME - An illumination apparatus which comprises a timing module, a control module and a first power conversion module and can be automatically adjusted with time is provided. The timing module sets the time into N sessions, and generates an i | 03-05-2015 |
| 20150061526 | LIGHT EMITTING COMPONENT AND LIGHT EMITTING DEVICE USING SAME - A light emitting device including a light emitting component is provided, wherein said light emitting comprising an integrated light emitting diode and a semiconductor field effect transistor. The semiconductor field effect transistor may prevent situations such as overheating and voltage instability by controlling a current passing through the light emitting diode as well as enhancing the ability to withstand electrostatic discharge and reducing cost of the light emitting device in multiple aspects. | 03-05-2015 |
| 20150077004 | LED DRIVER CIRCUIT AND BLEEDER CIRCUIT - A bleeder circuit includes a first resistor, a thermistor, a transistor, a second resistor, and a diode section. The first resistor biases the transistor into an always-on status. The second resistor prevents current from flowing through the thermistor responsive to a voltage at the positive terminal being greater than a minimum forward voltage of a load. The thermistor increases in electrical resistance, limiting the current flowing therethrough and preventing damage to the load responsive to the load short-circuiting. | 03-19-2015 |
| 20150084532 | DISPLAY DEVICE - A display device includes a plurality of common lines, a plurality of driving lines, a plurality of light emitting elements, a source driver, a sink driver, discharge devices, discharge limiting devices, and rectifying devices. The discharge devices are connected to the common lines and configured to lower voltage at the connected common lines. The discharge limiting devices are connected to the common lines and to the discharge devices, and apply a limitation so that the voltage at the connected common lines is not lowered below a prescribed value by the discharge devices. The rectifying devices are connected between the discharge devices and the discharge limiting devices, and the common lines, and pass a current from the common lines toward the discharge devices and the discharge limiting devices but do not pass a current from the discharge devices and the discharge limiting devices toward the common lines. | 03-26-2015 |
| 20150091462 | TWO-STAGE LED DRIVER WITH BUCK PFC AND IMPROVED THD - A two-stage light emitting diode (LED) driver for powering an LED load at a substantially constant current, and related methods and systems. The first or front end stage of the LED driver includes a buck topology power factor correction (PFC) circuit, the buck PFC circuit and a PFC controller. The second stage of the LED driver includes a conventional isolation and regulator circuit configured to receive the DC voltage and DC current output by the buck PFC and then to provide the substantially constant current to the LED load. By multiplying the rectified input voltage sensed by the PFC controller, the input AC current drawn by the buck PFC circuit has a much improved total harmonic distortion (THD), which is achievable without the need for using an expensive PFC controller. The rectified input voltage is multiplied using a Zener diode ladder. | 04-02-2015 |
| 20150091463 | LED LUMINAIRE DRIVING CIRCUIT AND METHOD - A resonant converter is provided with a plurality of secondary transformer windings. A first secondary winding provides a fixed output, which is utilized to control the switching frequency of the resonant converter. A second secondary winding drives one or more LED luminaires, and is provided with a secondary side resonant circuit. When the feedback from the first output calls for a reduced frequency so as to increase the output, the reduced frequency results in an increased impedance of the secondary side resonant circuit so as to prevent any voltage rise for the LED luminaires. When the feedback from the first output calls for an increased frequency so as to reduce the output, the increased frequency results in an decreased impedance of the secondary side resonant circuit so as to prevent any voltage fall for the LED luminaires. | 04-02-2015 |
| 20150091464 | LIGHTING DEVICE, ILLUMINATION DEVICE, ILLUMINATION APPARATUS AND ILLUMINATION SYSTEM - A lighting device includes an AC to DC conversion unit for receiving a setting signal and converting it into a DC voltage having a predetermined voltage, voltage conversion units for converting the DC voltage inputted from the AC to DC conversion unit and driving the light source modules according to drive signals, a PWM signal generating unit for generating a PWM signal having a duty ratio corresponding to the setting signal, and a control unit, by outputting the drive signals to the voltage conversion units based on a command value determined according to the duty ratio, for controlling output powers of the voltage conversion units such that a characteristic curve of the sum of the output powers of the voltage conversion units has the maximum or at least one inflection point within an adjustment range of the conduction angle. | 04-02-2015 |
| 20150097493 | LOAD DRIVER AND LUMINAIRE INCLUDING THE LOAD DRIVER - Various embodiments relate to a load driver and a luminaire including the load driver. The load driver may include a voltage limiting circuit including a first polar capacitor and a second polar capacitor connected in inverse series, which are connected in parallel respectively with first and second current limiting elements, where the first and second current limiting elements limit the direction in which current flows so that current flows through different polar capacitors in positive and negative halves of a cycle of an alternating-current power supply. | 04-09-2015 |
| 20150102741 | DIMMER FOR SPORT SIMULATION ENVIRONMENT - A light adjusting system for use with sport simulation equipment and a method of adjusting a state of operation of at least one light source used with golf simulation equipment is provided. The light adjusting system comprises a data interface, a light controller, an operations processor, and a storage device. The data interface is in communication with the sport simulation equipment. The light controller is in communication with at least one light source. The operations processor is in communication with the data interface and the light controller. The storage device is in data communication with the operations processor. The storage device includes at least one lighting profile. In response to communication between the sport simulation equipment and the data interface, the operations processor accesses the at least one lighting profile on the storage device and adjusts a state of operation of the at least one light source using the light controller. | 04-16-2015 |
| 20150108911 | RF SWITCH CONTROLLER POWER SUPPLY APPARATUS OF LAMP - The present invention relates to a radio frequency (RF) switch controller power supply apparatus. In case of the apparatus, it is possible not only to manually turn on/off electronic switches but also to remote control turning on/off a plurality of lamps installed at respective rooms by using an RF wireless remote controller. Also, since a plurality of transformers connected in series is connected to a power line toward the switches of the lamps and currents are extracted from the respective transformers, power in need is supplied to the RF switch controller. | 04-23-2015 |
| 20150108912 | CONFIGURABLE LED DRIVER/DIMMER FOR SOLID STATE LIGHTING APPLICATIONS - The disclosure is directed at a method and apparatus for configuring and powering light fixture loads for a LED low voltage distribution system. The method and apparatus include converting power being supplied for powering the set of light fixture loads and then limiting this converted power to a set of multiple current outputs supplied to the light fixture loads. The multiple current outputs are then split or regrouped prior to being delivered to the light fixture loads. | 04-23-2015 |
| 20150115823 | ANALOG CIRCUIT FOR COLOR CHANGE DIMMING - An analog-based dimmable LED lighting system includes a plurality of LED lighting modules, which emit light at different correlated color temperature (CCT) ranges. Each of the LED lighting modules is powered by a common dimming signal in the form of an AC voltage which corresponds to a dimming level in a dimming region. Each of the LED lighting modules includes an LED, an analog rectifier bridge to convert the AC voltage of the common dimming signal to a DC voltage, and an analog current limiter connected between the rectifier and the LED to control current through the LED according to the common dimming signal. The LED(s) in the different lighting modules are controlled, via respective analog current limiter, to produce a resultant light at a selected CCT and light intensity according to the common dimming signal. | 04-30-2015 |
| 20150130363 | LED DRIVING DEVICE, LIGHTING DEVICE, AND CONTROL CIRCUIT FOR LED DRIVING DEVICE - A light emitting diode (LED) driving device includes a rectifier, a voltage converter, a variable impedance unit, and a controller. The rectifier rectifies an alternating current (AC) voltage to generate a first voltage. The voltage converter generates a second voltage for driving a plurality of LEDs from the first voltage. The variable impedance unit is connected to an input terminal of the rectifier. The controller adjusts impedance of the variable impedance unit based on at least one of the first and second voltages. | 05-14-2015 |
| 20150137693 | HIGH EFFICIENCY POWER CONTROLLER FOR LUMINAIRE - Systems, methods and articles for providing lighting or illumination systems having drive circuits that employ a magnetic amplifier (“mag-amp”) and one or more feedback circuits to form a power converter that powers solid-state light sources (e.g., LEDs). The magnetic amplifier includes one or more magnetic cores which provides a controllable reluctance for magnetic flux. The magnetic amplifier includes one or more power windings which receive energy from an alternating current (AC) supply (e.g., AC mains) and delivers rectified AC current as direct current (DC) to one or more solid-state light sources. The magnetic amplifier includes one or more control windings coupled to a DC control source. The drive circuit may have two or more rectifiers (e.g., solid-state rectifiers) to provide a direct current to drive the solid-state light sources and also to isolate the one or more control windings from interference from the magnetic flux of the one or more power windings. | 05-21-2015 |
| 20150296578 | LED LIGHTING APPARATUS COMPRISING AN ENERGY STORAGE MODULE AND METHOD FOR OPERATING THE LED LIGHTING APPARATUS - An LED lighting apparatus | 10-15-2015 |
| 20150296585 | LED LIGHTING DEVICE WITH MODELLING DEVICE FOR MODELLING A VOLTAGE PROFILE - The present invention is directed to an LED lighting device for an AC power supply which emits a particularly uniform light. | 10-15-2015 |
| 20150296588 | LED LIGHTING APPARATUS WITH COLOUR MIXING - In comparison with thermal light sources, LED lighting has the advantage that it is very small and at the same time commercially available in different colours, so that coloured lighting can be produced inexpensively and at the same time in a manner that saves installation space. It is an object of the present invention to equip an LED lighting apparatus with a colour mixing functionality that is distinguished by high efficiency and at the same time a small number of components. | 10-15-2015 |
| 20150319818 | CIRCUIT ARRANGEMENT AND LED LAMP COMPRISING THE SAME - A circuit arrangement for operating at least one low-power lighting unit with a phase-cut operating voltage from a power supply is disclosed, which circuit arrangement comprises a serial setup of an input device ( | 11-05-2015 |
| 20150349659 | LOW-COST SELF-OSCILLATING DRIVER CIRCUIT - A driver circuit for powering a load is disclosed. The driver circuit includes a self-oscillating half-bridge circuit, a resonant driver in electrical communication with the self-oscillating half-bridge circuit, and a DC voltage supply in electrical communication with the resonant driver. The self-oscillating half-bridge circuit is configured to generate a high-frequency AC signal. The resonant driver is configured to limit a current of the high-frequency AC signal and produce a limited output voltage based on the high-frequency AC signal. The DC voltage supply is configured to rectify the limited output voltage into a DC output voltage including a substantially constant current for powering the load. | 12-03-2015 |
| 20150351180 | ALTERNATING CURRENT (AC)-DIRECT CURRENT (DC) POWER BOOSTER AND AC-DC POWER CONTROL MODULE FOR AC AND DC ILLUMINATIONS - The AC-DC power booster includes an electromagnetic interference (EMI) filter circuit that is included to convert alternating current (AC) power from among applied AC power and direct current (DC) power, to DC power to be output; a power factor correction (PFC) circuit that is connected to the EMI filter circuit and stabilizes an output voltage; and a switching mode power supply (SMPS) circuit that is connected to the PFC circuit and is capable of generating AC and DC power at the same time; a maximum power point tracking (MPPT) circuit that applies the voltage output from the SMPS circuit between a drain and a source of a switching device; a battery that is charged by receiving power from a solar light energy source connected to the MPPT circuit; and an inverter that operates an AC home appliance with the power received in the battery. | 12-03-2015 |
| 20150357908 | OFF-TIME CONTROL FOR SWITCHED MODE POWER SUPPLIES - A switched mode power supply may include circuitry configured to output a bias signal that turns off and on switching circuitry of the switched mode power supply. The circuitry may wait for a first time period determined by the bias signal, and output the bias signal to turn off the switching circuitry when the time period expires. In addition or alternatively, the circuitry may begin waiting for a second time period when the bias signal turns off the switching circuitry. The circuitry may turn on the switching circuitry either when energy in inductive storage circuitry is depleted or when the second time period expires. | 12-10-2015 |
| 20150362164 | Lighting Power Supply System - A lighting power supply system for providing efficient installation and operation of a low voltage power supply within an existing electrical box. The lighting power supply system generally includes a housing formed and adapted to fit within a conventional electrical box, a low voltage power supply positioned within the housing and a power switch attached to the housing. The power switch is electrically connected to the low voltage power supply within the housing. A dimmer switch is attached to the housing and is electrically connected to the power switch to provide dimmable low voltage power to a light strip. | 12-17-2015 |
| 20150373792 | LIGHT EMITTING DIODE (LED) DRIVING DEVICE AND LIGHTING APPARATUS INCLUDING THE SAME - A light emitting diode (LED) driving device includes a rectifier configured to rectify alternating current power to generate rectified power, an AC driver configured to control respective operations of the plurality of LED groups based on a voltage of the rectified power, and a controller configured to control an operation of the AC driver based on a control command received through a digital addressable lighting interface (DALI) communications protocol, and operate based on the rectified power received as driving power. | 12-24-2015 |
| 20150373799 | LED DRIVING DEVICE AND LIGHTING DEVICE - A light emitting diode (LED) driving device is provided. The LED driving device includes a rectifier configured to rectify alternating current (AC) power to generate rectified power; an AC driver configured to control operations of a plurality of LED groups so that the plurality of LED groups receive the rectified power generated by the rectifier; and a light amount controller configured to reduce an amount of current applied to the plurality of LED groups when a peak value of the rectified power is increased, and increase the amount of current applied to the plurality of LED groups when the peak value of the rectified power is reduced. | 12-24-2015 |
| 20150382421 | CONTROLLING LED CURRENT FROM A CONSTANT VOLTAGE SOURCE - An LED driver circuit provides dimming control in LED lighting applications that can accommodate an AC/DC constant voltage converter. The driver circuit provides a dimming control signal that is used to directly control the DC output current of a downstream DC/DC converter driving an LED array. The dimming control signal tracks the AC or DC output from a dimming controller such that variations in the AC or DC voltage are reflected in the dimming control signal. This dimming control signal is then provided to the downstream DC/DC converter, bypassing the AC/DC constant voltage converter to directly control dimming of the LED array. Such an arrangement lets lighting design engineers deploy the familiar and well-understood constant voltage converter topology in LED lighting applications while retaining the ability to control dimming in the LED lighting applications. | 12-31-2015 |
| 20160007418 | CONTROL CIRCUIT OF LED LIGHTING APPARATUS - A control circuit of an LED lighting apparatus divided into a plurality of LED channels may include: a current control circuit configured to provide a current path corresponding to sequential light emissions of the LED channels in response to a rectified voltage; and a residual voltage buffer circuit configured to correspond to an LED channel which finally emits light, and buffer a residual voltage when the rectified voltage rises to a preset value such that the residual voltage occurs. | 01-07-2016 |
| 20160014862 | CONTROL CIRCUIT OF LED LIGHTING APPARATUS | 01-14-2016 |
| 20160029447 | LIGHTING DEVICE, ILLUMINATION DEVICE, AND LIGHTING FIXTURE - A lighting device is configured such that only one of a first current control circuit and a charging current control circuit operates in any of operation modes from a first mode to a fourth mode. The lighting device is configured such that the first current control circuit and the charging current control circuit are not included in the same closed circuit. | 01-28-2016 |
| 20160050731 | LED DRIVING CIRCUIT USING DOUBLE BRIDGE DIODE AND LED ILLUMINATION DEVICE COMPRISING SAME - According to the present invention, provided is an LED driving circuit comprising: a first rectification module, connected to an alternating current power source, for full-wave rectifying an applied alternating current voltage and for supplying a first rectification voltage which has been full-wave rectified to an LED light emitting module as a first driving voltage; and a second driving voltage supply module, connected to the alternating current power source in parallel with the first rectification module, for full-wave rectifying an applied alternating current voltage to generate a second rectification voltage, for charging energy using the generated second rectification voltage at a charging section, and for supplying a second driving voltage to the LED light emitting module at a compensating section. | 02-18-2016 |
| 20160057822 | DRIVING CIRCUIT, LIGHTING DEVICE AND METHOD OF REDUCING POWER DISSIPATION - A driving circuit comprises a transformer, a first capacitor and a first controller. The transformer includes a primary winding and a secondary winding. The secondary winding is located in a secondary side and configured to generate a power. The first capacitor is connected in series to the primary winding, wherein the first capacitor and the transformer are configured to form a resonance unit. The first controller is configured to obtain a feedback current from the secondary side, and change a working frequency of the resonance unit based on the feedback current so as to change the power. | 02-25-2016 |
| 20160057825 | HIGH EFFICIENCY DRIVER CIRCUITRY FOR A SOLID STATE LIGHTING FIXTURE - Driver circuitry is coupled between a power supply and at least one LED in a solid-state lighting fixture, such that a non-isolated direct current (DC) path exists between the power supply and the at least one LED. The driver circuitry is configured to receive an AC input voltage and generate a driver output current for driving the at least one LED from the AC input voltage. By using driver circuitry that is non-isolated from the at least one LED in the solid-state lighting fixture, the efficiency of the driver circuitry may be increased, while simultaneously reducing the cost and complexity of the driver circuitry compared to conventional driver circuitry. | 02-25-2016 |
| 20160061432 | ENCAPSULATED LOW VOLTAGE LED LIGHTING SYSTEM - A lighting streamer for a low voltage LED lighting system includes a cable having a positive conductor and a negative conductor, a first connector, a second connector, and at least one socket assembly positioned between the first connector and the second connector and in electrical communication with the cable. Each of the socket assemblies are configured to receive an LED bulb therein. The socket assembly defines a top portion and a bottom portion which when assembled, pierce the positive conductor and the negative conductor. A protective coating encapsulates the at least one socket assembly. At least one LED light bulb positioned in and in electrical communication with the at least one socket. | 03-03-2016 |
| 20160073454 | Systems and Methods for Converting Alternating Current to Drive Light-Emitting Diodes - A system and method for converting alternating current from at least two types of electronic ballasts for fluorescent bulbs into direct current for an array of LEDs. The device is assembled such that it can fit into existing fluorescent bulb fixtures. Alternating current from a contemplated electronic ballast can have one of two peak-to-peak voltages and the circuitry of the device will convert either alternating current into approximately the same direct current. In doing so, the array of LEDs is illuminated providing an LED alternative to fluorescent light bulbs. | 03-10-2016 |
| 20160073455 | LIGHT EMITTING DIODE DRIVER - A driver for generating an output voltage to power an LED having a minimum operating voltage V | 03-10-2016 |
| 20160100466 | LIGHT EMITTING DIODE DRIVING CIRCUIT AND LIGHTING APPARATUS HAVING THE SAME - A light emitting diode (LED) driving circuit includes a flicker elimination unit configured to perform a flicker removal for LED modules and a driving control unit configured to pause a procedure of the flicker removal based on an AC input voltage that is regulated through a Triode for Alternating Current (TRIAC) dimmer, so as to cause a brightness of the LED modules to be dimmed. Therefore, the LED driving circuit selectively adjusts an LED brightness level and removes LED flicker by using a TRIAC dimmer and controls the brightness level of the LED module based on a dimming level. | 04-07-2016 |
| 20160105936 | RIPPLE REDUCTION IN LIGHT EMITTING DIODE (LED)-BASED LIGHT BULB THROUGH INCREASED RIPPLE ON AN ENERGY STORAGE CAPACITOR - A buck stage configured as a second stage of a lamp circuit for a light-emitting diode-based (LED-based) light bulb may reduce manufacturing costs associated with the bulb by reducing a size of a capacitor in the lamp circuit. A controller of the buck stage may adjust a duty cycle of a switch to increase a ripple, such as a voltage ripple, across the capacitor to increase accessibility of energy stored in the capacitor and decrease a ripple, such as in output current, to the LEDs. | 04-14-2016 |
| 20160105939 | DIMMABLE LED LIGHTING APPARATUS - A dimmable LED lighting apparatus including a power input unit generating drive voltage through rectification of received AC power and outputting the generated drive voltage to the drive controller, an insulation type signal transceiver receiving a pulse width modulation (PWM) signal output from a PWM dimmer and outputting the PWM signal to the drive controller, while electrically insulating the PWM dimmer from the drive controller, a first LED group to an nth LED group, n being a positive integer of 2 or greater, receiving the drive voltage and sequentially operating under control of the drive controller, and a drive controller controlling sequential operation of the first LED group to the nth LED group according to a voltage level of the drive voltage, determining a dimming level based on the received PWM dimming signal, and controlling dimming of the first LED group to the nth LED group based on the determined dimming level. | 04-14-2016 |
| 20160111970 | SWITCHING POWER SUPPLY CIRCUIT - Provided is a switching power supply circuit including an output transistor arranged to be turned on and off to generate a desired output voltage from a pulsating voltage obtained by rectifying an AC input voltage, an oscillator arranged to generate an ON signal at a switching frequency varying periodically in synchronization with the AC input voltage or the pulsating voltage, a controller arranged to generate an OFF signal so that the output voltage is adjusted to a target value while a power factor becomes close to one, a logic circuit arranged to generate a switch control signal in accordance with the ON signal and the OFF signal, and a driver arranged to turn on and off the output transistor in accordance with the switch control signal. | 04-21-2016 |
| 20160113076 | LED LAMP WITH DUAL MODE OPERATION - An LED lamp has dual modes of operation from fluorescent lamp fixtures. A first circuit powers at least one LED in a first mode of operation when first and second power connector pins at a first end of the lamp are inserted into power receptacles of the fixture that are directly connected to power mains. A second circuit powers at least one LED in a second mode of operation when the second power connector pin at the first end of the lamp and a third power connector pin at a second end of the lamp are inserted into power receptacles of a fixture powered from an electronic ballast. First and second conduction control means permit the second circuit to power at least one LED during the second mode of operation. | 04-21-2016 |
| 20160113077 | LED DRIVE CIRCUIT - An LED drive circuit includes a rectification circuit configured to rectify an alternating-current voltage that is input via a dimmer circuit, a delay circuit having a switch, and a light emitting unit including an LED array including LEDs connected in series, wherein the delay circuit turns on the switch when a predetermined time elapses after the alternating-current current is input, and the rectification circuit and the LED array are directly connected when the switch is on. | 04-21-2016 |
| 20160128153 | LED LIGHTING APPARATUS WITH IMPROVED FLICKER INDEX - A sequential driving type alternating current (AC) LED lighting apparatus includes a rectification unit connected to an alternating current (AC) power source and outputting a first rectified voltage as a first drive voltage to a light-emitting diode (LED) light-emitting unit through full-wave rectification of an AC voltage, and an LED drive controller configured to detect an LED drive current flowing through the LED light emitting unit or a constant current switch connected to the LED light emitting unit and configured to control sequential driving based on the detected LED drive current. The LED drive controller is configured to set an LED drive current in each of operation sections, such that a difference between light output of the LED light-emitting unit in each of the operation zones does not exceed a predetermined light output deviation. | 05-05-2016 |
| 20160143105 | DRIVER DEVICE AND DRIVING METHOD FOR DRIVING A LOAD, IN PARTICULAR AN LED UNIT - In various embodiments a device and method for providing power to an LED unit and modulating light emitted from the LED unit is disclosed. In one example, the device is configured to be connected between a driver and the LED unit. In this example, the device comprises a controllable resistor that receives from the driver a driver output voltage and to provides a load current to power the LED unit, a frequency filter for providing a substantially constant voltage to the LED unit, the frequency filter being connected to the controllable resistor to provide a substantially constant electrical power to the LED unit, and a modulator coupled in series to the LED unit for modulating the drive current and for modulating the emitted light output, wherein the substantially constant voltage applied to the LED unit is further applied to the modulator by means of the frequency filter. | 05-19-2016 |
| 20160156279 | Switch Unit | 06-02-2016 |
| 20160165702 | PROGRAMMABLE LIGHTING DEVICE AND METHOD AND SYSTEM FOR PROGRAMMING LIGHTING DEVICE - A programmable lighting device includes a power stage, a controller, a nonvolatile memory and a near field communication device. The power stage is configured to receive power from an external supply and supplying power to at least one light source. The controller is configured to control operation of the power stage according to an operating parameter and/or configuration setting for the programmable lighting device. The nonvolatile memory device stores the operating parameter and/or configuration setting. The near field communication device receives a radio frequency signal which communicates the operating parameter and/or configuration setting, and in response thereto stores the operating parameter and/or configuration setting in the nonvolatile memory. The near field communication device generates a supply voltage for powering the nonvolatile memory device from the RF signal. | 06-09-2016 |
| 20160174305 | AC LED LUMINESCENT APPARATUS AND A DRIVING METHOD THEREOF | 06-16-2016 |
| 20160174311 | Solid-State Lighting Compatible With Ballasts And Operable With AC Mains | 06-16-2016 |
| 20160174314 | Balanced AC Direct Driver Lighting System with a Valley Fill Circuit and a Light Balancer | 06-16-2016 |
| 20160174318 | MINIMAL COMPONENT HIGH VOLTAGE CURRENT LIMITED AC DIMMABLE LED DRIVER | 06-16-2016 |
| 20160183335 | Dimmable LED Illuminant System | 06-23-2016 |
| 20160183345 | ELECTRONIC BALLAST FOR OPERATING AT LEAST A FIRST AND A SECOND CASCADE OF LEDS | 06-23-2016 |
| 20160198541 | CONFIGURABLE LED DRIVER/DIMMER FOR SOLID STATE LIGHTING APPLICATIONS | 07-07-2016 |
| 20160204692 | LOW-COST DRIVER CIRCUIT WITH IMPROVED POWER FACTOR | 07-14-2016 |
| 20160205733 | LOW-COST DIMMING DRIVER CIRCUIT WITH IMPROVED POWER FACTOR | 07-14-2016 |
| 20160381750 | LED DRIVING APPARATUS AND LIGHTING APPARATUS INCLUDING THE SAME - An LED driving apparatus according to an exemplary embodiment of the present inventive concept may include a rectifier circuit rectifying alternating current (AC) power to generate driving power for operating a plurality of LED arrays; a controller integrated circuit (IC) including a plurality of internal switches connected to respective output terminals of the plurality of LED arrays and controlling a path of a current flowing in the plurality of LED arrays by adjusting operations of the plurality of internal switches according to a magnitude of the driving power; and a current controlling circuit connected to the output terminal of at least one of the plurality of LED arrays and controlling a current flowing in the at least one LED array. | 12-29-2016 |
