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9041293 Lamp control system, lamp power-saving system and method therefor  
A power-saving method for a lamp power-saving system is provided. The method includes the following steps. A lamp control unit is provided to control a fluorescent lamp. The lamp control unit...
9035556 Parallel-connected ballast circuits  
A ballast circuit adapted for converting an input alternating current (AC) mains power received at input terminals to an output alternating current (AC) to supply a load, e.g. a gas discharge...
9035564 High-frequency discharge ignition apparatus  
A high-frequency discharge ignition apparatus includes: a spark discharge path generation apparatus 101 for generating predetermined high voltage and supplying the generated predetermined high...
9030128 LED drive circuit  
An LED drive circuit applied between an LED load and an AC power supply is provided. The circuit includes a rectifier, a power conversion module, a voltage regulator, a photo coupler and a...
9030109 LED current balance driving circuit  
A LED current-balance driving circuit having a current-balance coil set, a switching unit, and a control circuit is provided. The current-balance coil set has at least a first coil and a second...
9030126 LED driving device  
An LED driving device has a first constant current source circuit and a voltage control circuit. The first constant current source outputs a first constant current to a first node and the first...
9030114 LED drive circuit and LED driving method  
An LED drive circuit of the present invention carries out, by use of a DC-to-DC converter, light control of an LED. The light control is carried out, in a region where a light control level is...
9030107 Illumination apparatus  
An illumination apparatus includes: a series circuit of a thyristor and at least one load circuit connected across an AC power source; a current control circuit for adjusting an input current to...
9030131 Insulated power supply device and lighting device  
An insulated power supply device includes: an electric power conversion unit, a rectifier, a filter, a detection unit, a control circuit, and a signal transmission unit. The control circuit...
9030115 LED driver with diac-based switch control and dimmable LED driver  
An LED driver may use a DIAC oscillator circuit to controls a semiconductor switch in a switching circuit. The DIAC oscillator circuit uses rectified line power and so it does not require a...
9030116 Load driving apparatus and driving method thereof  
A load driving apparatus and a driving method thereof are provided. The load driving apparatus includes a power conversion circuit and a control chip. The power conversion circuit receives a DC...
9024541 Utilizing secondary-side conduction time parameters of a switching power converter to provide energy to a load  
A power distribution system includes controller of a switching power converter to control the switching power converter and determine one or more switching power converter control parameters. In...
9024542 High efficiency LED driving circuit and driving method  
In one embodiment, an LED driving circuit can include: (i) a sense circuit configured to sense an inductor voltage, and to generate a sense voltage signal; (ii) a protection control circuit...
9024539 PFC LED driver capable of reducing flicker  
A PFC LED driver capable of reducing flicker, including: a bridge rectifier, used to generate a full-wave-rectified line input voltage according to an AC power a single stage PFC constant average...
9018844 Controllers and light modules with light emitting diodes  
Disclosed are a controller and a relevant LED lighting module. A disclosed controller comprises a high-voltage power terminal and a low-voltage power terminal, a major switch circuit, an...
9013115 Discharge lamp igniting apparatus  
A power supply circuit (4) is responsive to an activating signal by supplying a discharge lamp (2) with an operating voltage on which a high voltage is temporality superposed. An insufficient...
9006989 Circuit for driving lighting devices  
The inventive subject matter provides a circuit and a method for efficiently operating a lighting device, such as a light-emitting diode and a fluorescent lamp. In one aspect of the invention, the...
9006980 Apparatus and method for driving fluorescent lamp  
An apparatus and a method for driving a fluorescent lamp are provided. The apparatus submitted by the present invention includes an LC resonator and an automatic frequency tracing circuit. The LC...
9006992 Low current thyristor-based dimming  
Various apparatuses and methods for starting a thyristor are disclosed herein. For example, some embodiments provide an apparatus for controlling power to a load. The apparatus includes a...
9006988 Method of controlling ignition circuit and ignition circuit using the same  
A method of controlling an ignition circuit to output an excitation voltage is disclosed. The ignition circuit is used to excite a discharge lamp and includes a transformer and a switch element...
9007360 Electrooptic device, method for driving electrooptic device and electronic apparatus  
An electrooptic device has a data line, a pixel circuit and a driver circuit which drives the pixel circuit. The driver circuit has a first feeder line, a level shift circuit to be electrically...
9006990 Light tube and power supply circuit  
A replacement light tube for replacing a fluorescent light tube includes a bulb portion having a first end and a second end, a first end cap and a second end cap disposed at the first end and the...
9007000 Electronic circuits for driving series connected light emitting diode strings  
Electronic circuits provide an error signal to control a regulated output voltage signal generated by a controllable DC-DC converter for driving one or more series connected strings of light...
9000677 Light emitting diode driving apparatus  
There is provided a light emitting diode driving apparatus, including: a power supplying unit converting input power into driving power according to a control and supplying the converted driving...
9000685 Light emitting device power supply circuit, light emitting device control circuit and identifiable light emitting device circuit therefor and identification method thereof  
The present invention discloses a light emitting device power supply circuit, a light emitting device control circuit and an identifiable light emitting device circuit therefor, and an...
8994285 Electronic ballast and method for operating at least one discharge lamp  
In various embodiments, ballast for a discharge lamp includes input and output connections; inverter with bridge circuit with electronic switches and control device for controlling electronic...
8994287 Light source control device  
Disclosed is a light source control device including a power conversion unit and a control unit. The power conversion unit includes a transfer capacitor provided between a primary side circuit and...
8994283 Circuit for controlling a lighting unit having a periodic power supply with a thyristor  
A circuit capable of receiving, in series with at least one light-emitting diode, a rectified A.C. voltage, comprising: a first gate turn-off thyristor connected to first and second terminals of...
8994284 High intensity discharge lamp control circuit and control method  
A high intensity discharge lamp (HID) control circuit and method are provided in the present invention. The circuit includes a first winding and a second winding, both of which are coupled with a...
8994293 Single phase bridgeless boost converter for LED lighting applications  
A circuit serving as a power source for light-emitting diode (LED) lighting applications, the circuit comprising a boost converter comprising a pair of boost field-effect transistors (FETs) and a...
8994286 Operating device for a lamp having a power correction circuit  
For the purpose of power factor correction of an operating device for a lamp, an inductor (7) is supplied with an input voltage (Vin), a controllable switch element (13) coupled with the inductor...
8988010 LED driving device and lighting device  
An LED driving device that performs a dimming operation of an LED module, the device includes: a dimming controller that receives the dimming instruction signal and generates a dimming signal; and...
8987997 Dimming driver with stealer switch  
An apparatus for supplying power includes a power input, an output driver operable to transfer power from the power input to a load output, an output driver control switch operable to control a...
8981656 Relamping circuit for fluorescent ballasts  
A system and method of controlling a lighting system is provided. Lamp insertion detectors are coupled to a ballast and detect when relamping occurs. The outputs of the lamp insertion detectors...
8981658 Apparatus for driving light emitting diode  
There is provided an apparatus for driving a light emitting diode (LED), performing switching-operation with respect to a pair of LED groups by a phase difference of 180 degrees. The apparatus...
8981659 Input voltage transfer apparatus for light emitting diode lighting system  
An input voltage transfer apparatus for an LED lighting system is provided. The input voltage transfer apparatus includes a source voltage storage unit, a zero voltage switching unit, and a...
8981654 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...
8981657 Circuits and methods for driving light sources  
A circuit for powering a LED light source includes a converter and a controller. The converter provides an output voltage, and includes a first switch which is turned on and off alternately...
8981652 Apparatus and method for compensating current deviation  
An apparatus and method for compensating for a current deviation are provided. A current is applied through a light emitting diode (LED) array to which LEDs are connected. A current deviation is...
8981660 Electronic ballast  
The present invention discloses an electronic ballast for operating a gas discharge lamp which includes (i) a rectifier bridge circuit; (ii) a power factor correction (PFC) network that includes...
8975824 PWM driving circuit and PWM driving method  
Provided is a PWM driving circuit and a PWM driving method. The PWM driving circuit includes a dimmer switching unit turning on a first switch to apply a first reference signal varied according to...
8975820 Smooth dimming of solid state light source using calculated slew rate  
A method and system are provided for smoothly dimming a solid state light (SSL) source. The method includes measuring a dimming angle (S322) of a voltage received from a dimmer, determining a...
8975828 DC boost topology circuit for backlight driving  
The present invention provides a DC boost topology circuit for backlight driving, which includes a coupling inductor including a primary coil having an end connected to a DC voltage input terminal...
8975829 RF induction lamp with isolation system for air-core power coupler  
An induction RF fluorescent lamp includes a lamp envelope with a re-entrant cavity both covered on a partial vacuum side with phosphor and filled with a working gas mixture; an air-core power...
8970121 Driving device, light-emitting device and projector  
A driving device includes a power source that converts input power to output power, first and second capacitors connected to an output of the power source, a load selector, and a capacitor...
8970127 Lighting circuit and illumination device  
A lighting circuit according to embodiments includes: a self-hold element connected in series to an AC power source that generates power for lighting an illumination load, together with the...
8970120 Lamp driving apparatus and illumination equipment using the same  
A lamp driving apparatus and an illumination equipment using the same are provided. The provided lamp driving apparatus is responsible for driving a lamp. When any one of two terminals of the lamp...
8970117 Light emitting element drive device and mobile apparatus  
A light emitting element drive device of the present invention includes a light emitting element; a drive unit for driving the light emitting element; an electricity storage element capable of...
8965720 Efficiency monitor for inductive power transmission  
An efficiency monitor for monitoring the efficiency of power transmission by an inductive power outlet. The efficiency monitor includes an input power monitor, for measuring the input power...
8963438 Self-identifying solid-state transducer modules and associated systems and methods  
Self-identifying solid-state transducer (SST) modules and associated systems and methods are disclosed herein. In several embodiments, for example, an SST system can include a driver and at least...