| Patents for H05B 41 - Circuit arrangements or apparatus for igniting or operating discharge lamps (35,100) |
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| 09/27/1989 | CN2045144U Wall switch of fluorescent lamp without starter |
| 09/27/1989 | CN1035915A Electrodeless low-pressure discharge lamp |
| 09/26/1989 | US4870487 Light source device for an endoscope which maintains a constant minimum-DC current |
| 09/26/1989 | US4870454 Apparatus for and method of stabilizing the quantity of light of fluorescent lamp |
| 09/26/1989 | US4870327 High frequency, electronic fluorescent lamp ballast |
| 09/26/1989 | US4870326 Method and apparatus for driving neon tube to form luminous bubbles and controlling the movement thereof |
| 09/26/1989 | CA1261914A1 Electric generator system for portable floodlighting equipment |
| 09/26/1989 | CA1260998A1 Adaption circuit for operating a high-pressure discharge lamp |
| 09/26/1989 | CA1260055A1 Dc-ac converter for igniting and supplying a discharge lamp |
| 09/26/1989 | CA1260054A1 Circuit arrangement for operating a high-pressure discharge lamp |
| 09/21/1989 | WO1989008971A1 Circuit arrangement for monitoring the duty cycle of a transistor |
| 09/21/1989 | WO1989008880A1 Electronic ballast for discharge lamps |
| 09/21/1989 | DE3807585A1 Surgical luminaire |
| 09/20/1989 | EP0333359A1 Starter circuits for discharge lamps |
| 09/20/1989 | CN2044785U Energy-saving neon light changer |
| 09/19/1989 | US4868463 Method of operating a high-pressure discharge lamp |
| 09/13/1989 | EP0332263A1 Electrodeless low-pressure discharge lamp |
| 09/13/1989 | EP0331840A1 High wattage HID lamp circuit |
| 09/13/1989 | CN1035593A Power control circuit with phase controlled signal input |
| 09/12/1989 | USRE33057 High frequency supply system for gas discharge lamps and electronic ballast therefor |
| 09/12/1989 | US4866351 Annular light source unit using electrodeless discharge and a method of lighting the same |
| 09/12/1989 | US4866350 Fluorescent lamp system |
| 09/12/1989 | US4866347 Compact fluorescent lamp circuit |
| 09/12/1989 | US4865425 Power source device for driving liquid crystal |
| 09/06/1989 | EP0331508A2 A lighting appliance |
| 09/06/1989 | CN2044100U Low-temp. and low-pressure explosion-proof fluorescent lamp |
| 09/06/1989 | CN2044039U Double light source desk lamp for writing |
| 09/06/1989 | CN1035408A High-pressure sodium discharge lamp |
| 09/06/1989 | CN1035407A Discharge lamp driving method and electronic apparatus for implementation of same |
| 08/30/1989 | EP0330118A2 Drive circuitry for a low-pressure discharge lamp |
| 08/30/1989 | CN2043816U High efficiency energy-saving lamp with accumulator |
| 08/30/1989 | CN2043815U Ballast with electronic starter |
| 08/30/1989 | CN2043814U Energy-saving light adjuster of sun lamp |
| 08/29/1989 | US4862042 Apparatus and method for forming segmented luminosity in gas discharge tubes |
| 08/29/1989 | US4862040 Frequency-modulated inverter-type ballast |
| 08/29/1989 | US4862039 Vibratory mechanical energy apparatus |
| 08/29/1989 | US4862038 Automatic relamping system |
| 08/24/1989 | WO1989007877A1 A circuit for starting and operating a gas discharge lamp |
| 08/24/1989 | DE3805159A1 Electronic ballast device |
| 08/23/1989 | CN2043442U Electronic energy-saving transformer |
| 08/23/1989 | CN2043441U Electronic ballast for high-pressure discharge lamp |
| 08/23/1989 | CN2043440U 多功能荧光灯电路 Multifunctional fluorescent circuit |
| 08/22/1989 | US4859914 High frequency energy saving ballast |
| 08/22/1989 | US4859912 Stable brightness vacuum fluorescent display |
| 08/16/1989 | EP0328208A1 Circuit arrangement for operating a high pressure sodium discharge lamp |
| 08/16/1989 | EP0327602A1 Apparatus and method for forming segmented luminosity in gas discharge tubes. |
| 08/16/1989 | EP0327537A1 Ballast for high pressure sodium lamps having constant line and lamp wattage |
| 08/16/1989 | CN2043041U Ac/dc electronic glow starter for neon light |
| 08/16/1989 | CN2043040U Dc. induction fluorescent lamp |
| 08/16/1989 | CN2043039U Electronic ballast with overcurrent protecting function for fluorescent lamp |
| 08/16/1989 | CN2043038U Fluorescent electricity saver |
| 08/16/1989 | CN2043037U Sealed anti-radio-frequency interference electronic ballast |
| 08/15/1989 | US4858099 Resonant inverter |
| 08/15/1989 | US4857967 Light source device |
| 08/15/1989 | US4857810 Current interruption operating circuit for a gaseous discharge lamp |
| 08/15/1989 | US4857806 Self-ballasted screw-in fluorescent lamp |
| 08/09/1989 | EP0327404A1 Electronic ballast and starter circuit |
| 08/09/1989 | EP0326815A1 Control system for an electronic flash unit |
| 08/09/1989 | EP0326619A1 Power supply for microwave discharge light source |
| 08/09/1989 | CN2042651U Current-limiting device for fluorescent lamp network control |
| 08/09/1989 | CN2042626U Three-purpose switch |
| 08/09/1989 | CN2042568U Multi-functional power saving separable combined fan and desk lamp |
| 08/09/1989 | CN1034653A Power-saving source for neon lamp |
| 08/08/1989 | US4855860 Ground-fault protected ballast |
| 08/08/1989 | US4855646 Fluorescent illuminator with inverter power supply |
| 08/02/1989 | EP0326114A1 Drive device for a discharge lamp |
| 08/02/1989 | CN2042269U Electronic inverter for neon lamp |
| 08/02/1989 | CN2042268U Mixed-switch type starter of fluorescent lamp |
| 08/02/1989 | CN2042235U Life-prolonging and energy-saving piano key switch for fluorescent lamp |
| 08/01/1989 | US4853600 Flash apparatus with color temperature control |
| 08/01/1989 | US4853598 Fluorescent lamp controlling |
| 08/01/1989 | US4853597 Rapid restrike metal halide lamp and a method of operating such |
| 07/27/1989 | WO1989006894A1 Fluorescent dimming ballast utilizing a resonant sine wave power converter |
| 07/27/1989 | DE3800886A1 Method and device for controlling the supply voltage of a discharge lamp |
| 07/26/1989 | EP0325157A1 Gas discharge lamp |
| 07/26/1989 | EP0325009A1 Self-regulating, no load protection electronic ballast system |
| 07/26/1989 | CN1034296A Electric arrangement for igniting and supplying a gas discharge lamp |
| 07/25/1989 | US4851739 Controlled-frequency series-resonant ballast |
| 07/24/1989 | EP0327602A4 Apparatus and method for forming segmented luminosity in gas discharge tubes. |
| 07/19/1989 | EP0324651A1 High intensity discharge light sources utilizing magnetic or electric field for control of arc position |
| 07/19/1989 | EP0323992A1 Power supply circuit for an electric discharge lamp |
| 07/19/1989 | CN2041480U Ballast for starting fluorescent lamp |
| 07/18/1989 | US4849622 Panoramic optical system with very sharp beam control |
| 07/13/1989 | WO1989006481A1 Self-compensated electronic ballast |
| 07/12/1989 | EP0323676A1 Electric arrangement for igniting and supplying a gas discharge lamp |
| 07/12/1989 | EP0323452A1 Solid state ballast for high intensity discharge lamps having constant line and lamp wattage |
| 07/12/1989 | CN2041087U Moonlight lamp |
| 07/12/1989 | CN1033917A Dc/ac bridge circuit |
| 07/11/1989 | US4847538 Electronic flash equipment |
| 07/11/1989 | US4847537 Apparatus for starting and operating a discharge lamp |
| 07/11/1989 | US4847536 Power reducer for fluorescent lamps |
| 07/11/1989 | US4847535 Hybrid ballast for multiple discharge lamps |
| 07/05/1989 | CN2040688U Speed starting switch for fluorescent lamp |
| 07/05/1989 | CN1004746B Adaptation circuit for operating a high-pressure discharge lamp |
| 07/04/1989 | US4845406 Getter-containing glow discharge starter having dual gaps |
| 07/04/1989 | CA1256936A1 Circuit arrangement for a.c. operation of high- pressure gas discharge lamps |
| 07/04/1989 | CA1256935A1 Circuit arrangement for adjusting the operating voltage of high-pressure gas discharge lamps |
| 06/29/1989 | WO1989006085A1 Circuit arrangement for igniting and operating gas discharge lamps |
| 06/29/1989 | DE3743422A1 Circuit arrangement for operating one or more low-pressure discharge lamps |
| 06/28/1989 | CN2040288U Low-voltage neon lamp controlled by electronic circuit |