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Class Information
Number: 315/225
Name: Electric lamp and discharge devices: systems > Periodic switch in the supply circuit > Periodic switch cut-out
Description: Systems having means provided for rendering the periodic switch inoperative to interrupt the circuit when it is so desired.










Patents under this class:
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Patent Number Title Of Patent Date Issued
8710766 LED driving circuit, LED illumination appliance, LED illuminator, and LED illumination system Apr. 29, 2014
8704463 Temperature control method and apparatus for light emitting diode and liquid crystal display Apr. 22, 2014
8664873 Operating circuit for light-emitting diodes Mar. 4, 2014
8664885 Circuit for connecting a low current lighting circuit to a dimmer Mar. 4, 2014
8629629 Power factor correction in and dimming of solid state lighting devices Jan. 14, 2014
8593072 Circuit assembly and method for operating a high pressure discharge lamp Nov. 26, 2013
8575849 Resonate driver for solid state light sources Nov. 5, 2013
8552658 Light-emitting diode (LED) driver and controller Oct. 8, 2013
8547037 Liquid-cooled LED lighting device Oct. 1, 2013
8547038 High pressure discharge lamp lighting device Oct. 1, 2013
8531122 Circuit arrangement and method for operation of a discharge lamp Sep. 10, 2013
8519636 AC LED apparatus Aug. 27, 2013
8502475 Discharge lamp ballast with feedback current control during an electrode heating operation Aug. 6, 2013
8497637 Constant voltage dimmable LED driver Jul. 30, 2013
8493002 Driver for cooperating with a wall dimmer Jul. 23, 2013
8476889 Piezoelectric transformer driving device controlled by variable reference voltage values and image forming device Jul. 2, 2013
8471485 Dimmer switch assembly Jun. 25, 2013
8450934 Circuit arrangement and method for operating a low-pressure discharge lamp May. 28, 2013
8427064 Electronic ballast circuit for fluorescent lamps Apr. 23, 2013
8421364 Transient suppression for boost regulator Apr. 16, 2013
8415891 Lamp ballast circuit and driving method thereof Apr. 9, 2013
8415893 Load control device, and lighting device Apr. 9, 2013
8415901 Switch sensing emergency lighting device Apr. 9, 2013
8378962 LCD backlight driving device with an isolating transformer Feb. 19, 2013
8368322 Driving circuit for LED lamp Feb. 5, 2013
8368313 Electronic candle and electronic night lamp Feb. 5, 2013
8362711 AC LED apparatus Jan. 29, 2013
8358090 Dimmer circuit for transformer--isolated LED driver and method therefor Jan. 22, 2013
8344628 Dimming electronic ballast with lamp end of life detection Jan. 1, 2013
8344653 Light emitting diode backlight driving system Jan. 1, 2013
8339048 Hybrid light source Dec. 25, 2012
8334659 Electronic driver dimming control using ramped pulsed modulation for large area solid-state OLEDs Dec. 18, 2012
8278830 Dynamic headroom control for LCD driver Oct. 2, 2012
8278843 Method for operating a switching-mode power supply Oct. 2, 2012
8278831 LED driver circuit and method, and system and method for estimating the junction temperature of a light emitting diode Oct. 2, 2012
8274234 Dimming ballast with parallel lamp operation Sep. 25, 2012
8258713 Supplying a signal to a light source Sep. 4, 2012
8253339 Lighting element failure detection devices and methods for power switching based systems Aug. 28, 2012
8246175 Lighting device, light source device, projector, and discharge lamp lighting method Aug. 21, 2012
8231230 Image projection device Jul. 31, 2012
8217591 Power source sensing dimming circuits and methods of operating same Jul. 10, 2012
8193716 High-power LED driving circuit Jun. 5, 2012
8174207 Lamp and driving device for backlight assembly having the same May. 8, 2012
8129916 Light emitting driver circuit with bypass and method Mar. 6, 2012
8129914 Operating circuit for light-emitting diodes Mar. 6, 2012
8120266 Driving circuit for driving a load Feb. 21, 2012
8120273 Light control system with PWM duty cycle control using current signal feedback Feb. 21, 2012
8110998 Multi-pulse ignition circuit for a gas discharge lamp Feb. 7, 2012
8106600 Photopolymerization apparatus Jan. 31, 2012
8106601 LED illuminant driving circuit and automatic brightness compensation method thereof Jan. 31, 2012

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