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Class Information
Number: 315/224
Name: Electric lamp and discharge devices: systems > Periodic switch in the supply circuit > Impedance or current regulator in the supply circuit
Description: Systems having an impedance or a current or voltage regulator connected in the supply circuit of the load device.

Patents under this class:

Patent Number Title Of Patent Date Issued
8120266 Driving circuit for driving a load Feb. 21, 2012
8120265 Lamp driver for operating a gas discharge lamp Feb. 21, 2012
8120264 Discharge lamp lighting circuit Feb. 21, 2012
8120201 LED vehicle lighting apparatus Feb. 21, 2012
8115536 Self-oscillating switch circuit for use in a switching DC-DC converter Feb. 14, 2012
8115419 Lighting control device for controlling dimming, lighting device including a control device, and method of controlling lighting Feb. 14, 2012
8111528 DC to AC inverter Feb. 7, 2012
8111017 Circuits and methods for controlling dimming of a light source Feb. 7, 2012
8111008 Multiple-input electronic ballast with processor Feb. 7, 2012
8111005 Voltage supply module and backlight assembly having the same Feb. 7, 2012
8110998 Multi-pulse ignition circuit for a gas discharge lamp Feb. 7, 2012
8106600 Photopolymerization apparatus Jan. 31, 2012
8098028 Control circuit and method for controlling LEDs Jan. 17, 2012
8098023 Driving circuit for and semiconductor device for driving laser diode Jan. 17, 2012
8098022 Circuit configuration for operating at least one discharge lamp and method for generating an auxiliary voltage Jan. 17, 2012
8098020 Circuit arrangement and method for operating a discharge lamp Jan. 17, 2012
8097976 Lighting controller for a vehicle lamp Jan. 17, 2012
8093838 Driving circuit and method for preventing lamp from blasting Jan. 10, 2012
8093837 Lamp ballast and an illumination apparatus Jan. 10, 2012
8093828 Drive circuit, light emitting diode head, and image forming apparatus Jan. 10, 2012
8093822 LED driver and control method thereof Jan. 10, 2012
8093820 Fluorescent ballast with isolated system interface Jan. 10, 2012
8089216 Linearity in LED dimmer control Jan. 3, 2012
8084954 Lamp driving circuit Dec. 27, 2011
8084953 Changing power input to a gas discharge lamp Dec. 27, 2011
8084949 Fluorescent ballast with inherent end-of-life protection Dec. 27, 2011
8080949 HID ballast with integrated voltage multiplier and lamp temperature compensation Dec. 20, 2011
8077140 Liquid crystal display device Dec. 13, 2011
8076872 Light emitting diode circuit and arrangement and device Dec. 13, 2011
8076871 Driver apparatus for a gas discharge lamp Dec. 13, 2011
8072163 Knowledge-based driver apparatus for high lumen maintenance and end-of-life adaptation Dec. 6, 2011
8072161 Bi-directional light emitting diode drive circuit in pulsed power non-resonance Dec. 6, 2011
8067905 Power line preconditioner for improved LED intensity control Nov. 29, 2011
8067896 Digitally controlled current regulator for high power solid state lighting Nov. 29, 2011
8063586 Method of driving a discharge lamp, and driving unit Nov. 22, 2011
8063585 Power supply system and method for the operation of an electrical load Nov. 22, 2011
8063578 Method and firmware for generating a digital dimming waveform for an inverter Nov. 22, 2011
8063577 Method and a driver circuit for LED operation Nov. 22, 2011
8063572 High-pressure discharge lamp lighting device Nov. 22, 2011
8063571 Bi-directional light emitting diode drive circuit in bi-directional divided power impedance Nov. 22, 2011
8063570 Simple protection circuit and adaptive frequency sweeping method for CCFL inverter Nov. 22, 2011
8058820 Uni-directional light emitting diode drive circuit in pulsed power parallel resonance Nov. 15, 2011
8058812 Buck-mode boost converter with regulated output current Nov. 15, 2011
8058811 HID lamp ballast circuit Nov. 15, 2011
8058810 Method and system for high efficiency, fast transient multi-channel LED driver Nov. 15, 2011
8058806 Fluorescent task lamp with optimized alignment and ballast Nov. 15, 2011
8054007 Bi-directional light emitting diode drive circuit in bi-directional power series resonance Nov. 8, 2011
8054003 Switch-off time regulation system for an inverter for driving a lamp Nov. 8, 2011
8053999 HID ballast Nov. 8, 2011
8049435 Frequency synchronizing method for discharge tube lighting apparatus, discharge tube lighting apparatus, and semiconductor integrated circuit Nov. 1, 2011

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