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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
8253344 Light emitting diode lighting device Aug. 28, 2012
8247996 Backlight driving system utilizing one PWM controller to control two backlight units separately Aug. 21, 2012
8247986 Power conversion controller having an adaptive peak current reference Aug. 21, 2012
8247984 LED circuit and method for controlling the average current of the LED Aug. 21, 2012
8247982 Method of driving a light source, light source assembly for performing the method, and liquid crystal display apparatus having the same Aug. 21, 2012
8246175 Lighting device, light source device, projector, and discharge lamp lighting method Aug. 21, 2012
8242712 Power supply apparatus Aug. 14, 2012
8242705 Frequency modulation method and device for high intensity discharge lamp Aug. 14, 2012
8242702 Method for driving a fluorescent lamp, and lamp ballast Aug. 14, 2012
8237382 LED module and method for operating at least one LED Aug. 7, 2012
8237376 Fast switching, overshoot-free, current source and method Aug. 7, 2012
8237373 Drive device for performing electric power conversion by using switching element Aug. 7, 2012
8237371 Differential driving circuit for powering a light source Aug. 7, 2012
8232734 Electronic ballast having a partially self-oscillating inverter circuit Jul. 31, 2012
8228004 Systems and methods for driving a light source Jul. 24, 2012
8227998 Controller for controlling dimming of a light source Jul. 24, 2012
8222830 Discharge lamp lighting device, lighting fixture, and lighting system Jul. 17, 2012
8222829 Driver circuit and method for driving load circuit Jul. 17, 2012
8222828 Circuit arrangement for igniting and operating a discharge lamp Jul. 17, 2012
8222827 Inductively coupled ballast circuit Jul. 17, 2012
8222826 Control of delivery of current through one or more lamps Jul. 17, 2012
8217593 Method and driving unit for driving a gas-discharge lamp Jul. 10, 2012
8217584 Driving circuit for driving light emitting diodes and dimmer Jul. 10, 2012
8217583 Gas-discharge lamp controller utilizing a novel reheating frequency generation mechanism Jul. 10, 2012
8213194 Control device for a flyback converter Jul. 3, 2012
8212492 Electronic ballast with high power factor Jul. 3, 2012
8207739 Identification of an absent load from a circuit Jun. 26, 2012
8207688 Electric-discharge lamp lighting device and lighting fixture Jun. 26, 2012
8207687 Dimmable driver circuits for light emitting diodes Jun. 26, 2012
8207686 LED controller and method using variable drive currents Jun. 26, 2012
8207677 Lighting equipment Jun. 26, 2012
8203284 Driving light emitting diodes Jun. 19, 2012
8203279 Method of dimming Jun. 19, 2012
8203278 Power supply for light emitting diode display Jun. 19, 2012
8198832 Method and system for extending PWM dimming range in LED drivers Jun. 12, 2012
8198829 Intensity balance for multiple lamps Jun. 12, 2012
8198825 Illuminating module capable of compensating current Jun. 12, 2012
8198824 Electronic ballast for restarting high-pressure discharge lamps in various states of operation Jun. 12, 2012
8193741 Boosting driver circuit for light-emitting diodes Jun. 5, 2012
8193728 Circuit arrangement and method for operating a high-pressure discharge lamp Jun. 5, 2012
8193727 Lamp end of life protection circuit and method for an electronic dimming ballast Jun. 5, 2012
8193726 Fluorescent light temperature sensor Jun. 5, 2012
8193720 Electrodeless lamp protecting device Jun. 5, 2012
8193718 Diagnosis circuit apparatus and lamp ballast circuit using the same Jun. 5, 2012
8193716 High-power LED driving circuit Jun. 5, 2012
8188683 Poly-chromatic light-emitting diode (LED) lighting system May. 29, 2012
8188680 Illuminating device May. 29, 2012
8188674 LED light emitting device and driving method thereof May. 29, 2012
8188671 Power factor control for an LED bulb driver circuit May. 29, 2012
8183791 System and method for preventing low dimming current startup flash May. 22, 2012











 
 
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