| Patents for H05B 41 - Circuit arrangements or apparatus for igniting or operating discharge lamps (35,100) |
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| 07/14/2004 | CN1158002C Method and device for operating electronic ballasts for high intensity discharge (HID) lamp |
| 07/14/2004 | CN1157338C Point-of-use water treatment system |
| 07/13/2004 | US6762742 Apparatus and method for automatic brightness control for use in liquid crystal display device |
| 07/13/2004 | US6762569 Constant light output circuit and electrical components based thereon |
| 07/08/2004 | WO2004057934A1 Bistate hid operation |
| 07/08/2004 | WO2004057933A1 Dc/ac converter for supplying two gas discharge lamps |
| 07/08/2004 | WO2004057932A1 Method and device for driving a gas-discharge lamp |
| 07/08/2004 | WO2004057931A1 Improved high frequency electronic ballast |
| 07/08/2004 | WO2004057930A1 Apparatus for igniting a high pressure gas discharge lamp |
| 07/08/2004 | WO2004057929A1 Supply apparatus for high pressure lamps |
| 07/08/2004 | WO2004057928A1 System for controlling and regulating continuously the luminous flow of every single lamp derived on a parallel line |
| 07/08/2004 | WO2003045119B1 Luminosity-adjustable high frequency fluorescent lamp illuminating device |
| 07/08/2004 | US20040130921 DC-AC converter and controller IC for the same |
| 07/08/2004 | US20040130916 Adaptive inductive power supply |
| 07/08/2004 | US20040130915 Adaptive inductive power supply with communication |
| 07/08/2004 | US20040130687 Projector of external power supply |
| 07/08/2004 | US20040130521 Display apparatus and method |
| 07/08/2004 | US20040130299 Circuits and techniques for capacitor charging circuits |
| 07/08/2004 | US20040130274 Electronic ballast with programmable processor |
| 07/08/2004 | US20040130273 Ballast self oscillating inverter with phase controlled voltage feedback |
| 07/08/2004 | US20040129894 Mercury lamp with electronic ballast and use thereof |
| 07/07/2004 | EP1435764A1 Electrodeless discharge lamp lighting device, light bulb type electrodeless fluorescent lamp and discharge lamp lighting device |
| 07/07/2004 | EP1435192A2 Dimmable ballast for electrodeless fluorescent lamps |
| 07/07/2004 | EP1368998A4 El driver for small semiconductor die |
| 07/07/2004 | CN2624583Y Adjustable gas discharge lamp |
| 07/07/2004 | CN2624582Y Electronic ballast with passive power factor correction |
| 07/07/2004 | CN2624581Y A starting circuit for energy-saving lamp |
| 07/07/2004 | CN2624580Y An electronic ballast radiating from casing |
| 07/07/2004 | CN1510978A Light driving circuit for effective control part temperature in fluorescent lamp |
| 07/07/2004 | CN1510977A Fluorescent light life stop protective circuit |
| 07/07/2004 | CN1510976A Digital high-strength gas discharging light adapter |
| 07/07/2004 | CN1510975A Starter of discharge light and illuminating apparatus |
| 07/07/2004 | CN1510824A DC-AC transformer and controller IC thereof |
| 07/07/2004 | CN1510504A Light source driving circuit, spot controlling method, projector and readable programm of computer |
| 07/07/2004 | CN1510488A Illuminating apparatus |
| 07/07/2004 | CN1157102C Method, circuit and electronic equipment for driving bias light |
| 07/07/2004 | CN1157101C Controller of flashing lamp group with common power supply and its control method |
| 07/07/2004 | CN1157100C Resonant converter circuit |
| 07/06/2004 | USRE38547 Frequency-modulated converter with a series-parallel resonance |
| 07/06/2004 | US6759813 Operating circuit for a discharge lamp with frequency-variable ignition |
| 07/06/2004 | US6759812 Discharge lamp lighting circuit for detecting failure of a switching element |
| 07/06/2004 | US6759811 Light source device |
| 07/01/2004 | WO2004055961A2 Resonance converter and method for driving variable loads |
| 07/01/2004 | WO2003073244A3 Frequency divider |
| 07/01/2004 | US20040125599 Illuminating device |
| 07/01/2004 | US20040125534 Igniter transformer |
| 07/01/2004 | US20040125071 Inverter device, liquid crystal display device using the inverter device, and method of monitoring lamps of the liquid crystal display device using the inverter device |
| 07/01/2004 | US20040124790 Backlight driving circuit |
| 07/01/2004 | US20040124789 Discharge lamp starting device and illumination apparatus |
| 07/01/2004 | US20040124787 Fluorescent lamp end-of-life protection circuit |
| 07/01/2004 | US20040124785 Method and apparatus for arc detection and protection for electronic ballasts |
| 07/01/2004 | US20040124784 Lighting system and electric power supplier for the same |
| 07/01/2004 | US20040124783 Electronic ballast for fluorescent lamp |
| 07/01/2004 | US20040124338 Distributed dimmable lighting control system and method |
| 07/01/2004 | DE202004004461U1 Gas discharge lamp drive circuit e.g. for emergency lighting, includes control circuit designed to operate load circuit with lamp at start of preheating phase at different frequencies |
| 07/01/2004 | DE202004004460U1 Circuit for emergency lighting operation, has push-pull transformer operating at variable drive frequency |
| 07/01/2004 | DE10204059B4 Steuereinrichtung für den Betrieb einer Mehrzahl von mit Gasentladungslampen bestückten Leuchten Control means for operating a plurality of gas discharge lamps fitted with lamps |
| 06/30/2004 | EP1434471A1 Reduction of vertical segregation in a discharge lamp |
| 06/30/2004 | EP1433365A1 Electronic ballast with lamp run-up current regulation |
| 06/30/2004 | EP1433364A1 Electronic ballast system with dual power and dimming capability |
| 06/30/2004 | EP1432611A1 Control device for flashlight systems in airports |
| 06/30/2004 | CN2622986Y Light adjustable T5 fluorescent lamp circuit |
| 06/30/2004 | CN2622985Y Electronic ballast for high strength gas discharging lamp |
| 06/30/2004 | CN2622984Y Circuit of light dimming electromagnetic induction light |
| 06/30/2004 | CN2622983Y Filter circuit of electronic ballast for fluorescent lamp |
| 06/30/2004 | CN2622982Y Fire proof ballast of intelligence fluorescent lamp |
| 06/30/2004 | CN1509129A Light-regulation system |
| 06/30/2004 | CN1156201C Ballast for driving fluorescent lamp |
| 06/30/2004 | CN1156200C Ballast system |
| 06/30/2004 | CN1156199C Discharge lamp ballast |
| 06/30/2004 | CA2421496A1 Distributed dimmable lighting control system and method |
| 06/29/2004 | US6756747 Apparatus and method for eliminating striation of fluorescent lamp with dimming control |
| 06/29/2004 | US6756746 Method of delaying and sequencing the starting of inverters that ballast lamps |
| 06/29/2004 | US6756745 Four-electrode fluorescent lamp and the circuit for arranging the same |
| 06/29/2004 | US6756744 Method of initiating lighting of a discharge lamp, circuit for lighting a discharge lamp, light source device using the circuit, and optical instrument incorporating the light source device |
| 06/29/2004 | US6755555 Auxiliary illuminating device having an adjustable color temperature by controlling the amount of light passing through color filters |
| 06/29/2004 | CA2310292C Illumination sensor and electronic automatic on/off switch |
| 06/29/2004 | CA2171931C Method and circuit for operating a discharge lamp |
| 06/24/2004 | WO2004054328A1 Lighting unit |
| 06/24/2004 | WO2004054327A1 Electric circuit for igniting a discharge lamp and method for igniting the discharge lamp |
| 06/24/2004 | WO2004053577A1 Power supply device and liquid crystal display device using the same |
| 06/24/2004 | US20040119425 Lamp lighting apparatus |
| 06/24/2004 | US20040119424 Fluorescent lamp ballast control circuit |
| 06/24/2004 | US20040119423 Hi lumen dimmed lamp method and system |
| 06/24/2004 | US20040119420 Flat lamp and method of driving the same |
| 06/24/2004 | US20040119415 System for individual and remote control of spaced lighting fixtures |
| 06/23/2004 | EP1430753A1 Adaptive control for half-bridge universal lamp drivers |
| 06/23/2004 | EP1430511A2 Dielectric barrier discharge lamp and method and circuit for igniting and operating said lamp |
| 06/23/2004 | CN2621385Y DC electronic ballast |
| 06/23/2004 | CN1507309A Two-phase H-shaped bridge driver circuit and method |
| 06/23/2004 | CN1507308A Electronic ballast for two-tube fluorescent lamp |
| 06/23/2004 | CN1155300C Circuit arrangement |
| 06/23/2004 | CN1155299C Circuit arrangement |
| 06/23/2004 | CN1155298C Discharge lamp lighting device |
| 06/23/2004 | CN1155297C Lighting device of discharge lamp and illuminator |
| 06/23/2004 | CN1155296C Timing of different phases in ignition circuit |
| 06/22/2004 | US6754447 Flash controlling apparatus utilizing characteristics of a logarithmic function |
| 06/22/2004 | US6753855 Driver circuit for LCDM |
| 06/22/2004 | US6753660 Method and arrangement with control gear, and control gear |
| 06/22/2004 | US6753659 Operating device for discharge lamps having a preheating device |