Patents for H05B 41 - Circuit arrangements or apparatus for igniting or operating discharge lamps (35,100) |
---|
07/04/1990 | EP0376173A2 Glow discharge lamp having dual anodes and circuit for operating same |
07/04/1990 | EP0376171A2 Electronic ballast circuit for discharge lamp |
07/04/1990 | EP0376149A2 Rare gas discharge fluorescent lamp device |
07/04/1990 | EP0375963A2 Variable color-output strobe |
07/04/1990 | CN2059042U Electronic energy-saving lamp without starter |
07/04/1990 | CN2059041U High reliable high power-factor quick start ballast |
07/04/1990 | CN2059040U Electronic daylight lamp ballast with lampholder |
07/03/1990 | US4939430 Ignitor circuit for discharge lamps with novel ballast |
07/03/1990 | US4939427 Ground-fault-protected series-resonant ballast |
07/03/1990 | US4939423 Reduction of effects of beat frequencies in systems with multiple oscillators |
07/03/1990 | US4939422 Electronic ballast for tungsten lamp tubes |
07/03/1990 | US4939421 Method and apparatus for reducing interference from light sources |
07/03/1990 | US4939381 Power supply system for negative impedance discharge load |
07/03/1990 | US4938727 Method of manufacturing a glow discharge starter |
06/28/1990 | WO1990007209A1 Adapter for a compact discharge lamp in a lamp fitting |
06/28/1990 | CA2006532A1 Peak voltage reducer circuit for fluorescent lamps |
06/27/1990 | EP0375098A2 Display panels |
06/27/1990 | EP0375020A2 A transient protection circuit |
06/27/1990 | EP0374724A1 Electrical supply rail for lighting fixtures |
06/27/1990 | EP0374617A2 Device for starting and operating electric gas discharge lamps |
06/27/1990 | CN2058796U Apparatus for operating the capacitive daylight lamp |
06/27/1990 | CA2001953A1 Variable color-output strobe |
06/26/1990 | US4937505 Energizing arrangement for a discharge lamp |
06/26/1990 | US4937504 Time delay initialization circuit |
06/26/1990 | US4937502 For fluorescent lamps |
06/26/1990 | US4937501 Circuit arrangement for starting a high-pressure gas discharge lamp |
06/26/1990 | US4937500 Perfluorinated compounds with helium |
06/26/1990 | US4937498 DC/AC converter for igniting and supplying a gas discharge lamp |
06/26/1990 | US4937497 On-vehicle brake lamp apparatus |
06/20/1990 | EP0373712A2 Excess voltage protection circuit |
06/20/1990 | CN2058548U Noiseless electronic ballast |
06/19/1990 | US4935862 Method and apparatus for control of fluorescent lamps |
06/19/1990 | US4935772 Method of and apparatus for controlling photographic printing lamp light output |
06/19/1990 | US4935759 System for controlling an illuminating angle of a flashlight |
06/19/1990 | US4935691 Phase switched power controller |
06/19/1990 | US4935673 Variable impedance electronic ballast for a gas discharge device |
06/19/1990 | US4935672 High frequency ballast for a gas discharge lamp |
06/19/1990 | US4935669 Two-mode electronic ballast |
06/13/1990 | EP0372977A2 Electronic flash apparatus |
06/13/1990 | EP0372661A1 Supply circuit for a gasdischarge lamp |
06/13/1990 | EP0372303A1 Circuit arrangement for operating a low-pressure discharge lamp |
06/13/1990 | DE3841095A1 Circuit arrangement of a half-bridge invertor |
06/13/1990 | DE3823452A1 Safety starter for low-voltage discharge lamps |
06/13/1990 | CN2058297U Power saving electrod pair fluorescent lamp |
06/13/1990 | CN1043065A Apparatus for controlling gas-filled tube lamps |
06/12/1990 | US4933831 Power supply |
06/12/1990 | US4933798 Self protecting and automatic resetting capacitor synchronous switch apparatus for control of AC power to inductive loads |
06/12/1990 | US4933612 Excitation circuit for gas discharge lamp |
06/12/1990 | US4933606 Discharge lamp driving method and electronic operators for implementation of the same |
06/12/1990 | US4933605 Fluorescent dimming ballast utilizing a resonant sine wave power converter |
06/07/1990 | DE3840845A1 Circuit arrangement for starting and operating a low-pressure discharge lamp |
06/06/1990 | EP0371439A2 Discharge lamp lighting apparatus for controlling voltage of switching transistor by raising starting voltage |
06/06/1990 | CN2058048U Light-regulating and energy-saving switch of fluorescent lamp |
06/05/1990 | US4931824 Camera boosting circuit |
06/05/1990 | US4931780 Illuminated address identifier and alarm device |
06/05/1990 | US4931701 Bi-level ballast circuit for operating HID lamps |
06/05/1990 | US4931699 Ballast system including a starting aid for a gaseous discharge lamp |
05/31/1990 | WO1990006040A1 Arc lamp stabilization |
05/31/1990 | WO1990005992A1 Device for igniting gas-discharge lamps |
05/31/1990 | DE3925290A1 Schaltungsanordnung zur blitz-synchronisierung Circuit arrangement for flash-sync |
05/31/1990 | DE3840078A1 Method for increasing the lifetime of an ultraviolet lamp and carrying out the method |
05/30/1990 | CN2057799U 电子镇流器 Electronic Ballast |
05/29/1990 | US4929873 Luminaire system |
05/29/1990 | US4929871 Appliance |
05/23/1990 | CN1042463A High frequency field excited fluorescent lamp device |
05/22/1990 | US4928040 Ultra violet ray generator by means of microwave excitation |
05/22/1990 | US4928039 Electronic ballast with lamp pre-conditioning |
05/22/1990 | US4928038 Power control circuit for discharge lamp and method of operating same |
05/22/1990 | US4928037 Protected discharge lamp lighting system |
05/16/1990 | CN1042287A Electronic ballast of fluorescent lamp |
05/15/1990 | US4926097 Ballast circuit for a fluoroescent lamp |
05/15/1990 | US4926096 Shock-protected electronic ballast |
05/15/1990 | CA2002845A1 Fluorescent lamp electrode disconnect method and arrangement for practicing the method |
05/09/1990 | CN2057051U Electronic ballast having long lead wire |
05/09/1990 | CN2057050U Full-wave double-voltage ballast for dc fluorescent lmap |
05/09/1990 | CN2057049U Low-power compatible ballast for gas discharging lemps |
05/09/1990 | CN1042037A Direct current electronic controller for fluorescent lamp |
05/08/1990 | US4924152 Thermoplastic ballast housing in a novel three-dimensional printed circuit board |
05/08/1990 | US4924150 Power-line control system |
05/08/1990 | US4924149 Apparatus for controlling the charging of a main capacitor of a flash unit |
05/08/1990 | US4924147 High-frequency fluorescent marine light |
05/02/1990 | CN2056802U Long life power saving device for street lamp |
05/02/1990 | CN2056801U Electronic starter for daylight lamp |
05/02/1990 | CN1041859A Electronic ballast of luminous efficacy for fluorescent tube |
04/26/1990 | DE3835533A1 Electronic starting device for starting fluorescent lamps in radio-frequency operation |
04/24/1990 | US4920302 Fluorescent lamp power supply |
04/24/1990 | US4920301 Capacitor discharge strobe light |
04/24/1990 | US4920300 For an arc discharge lamp |
04/24/1990 | US4920299 Push-pull fluorescent dimming circuit |
04/18/1990 | CN2056303U High-efficiency power-saving power supply for neon light |
04/18/1990 | CN2056302U High-efficiency electronic ballast for fluorescent light |
04/18/1990 | CN1041504A High-frequency electronic power supply for fluorescent lamp |
04/18/1990 | CN1041503A Super-efficient double-compatible inversion sourse non-polar neon lamp |
04/11/1990 | EP0362565A1 High stability high intensity atomic emission light source |
04/11/1990 | CN2056006U 110v electric net fluorescent lamp lighting device |
04/11/1990 | CN2056005U Double-line switch for fluorescent lamp |
04/11/1990 | CN1041256A Time delay initialization circuit |
04/10/1990 | US4916364 Parallel arranged starting circuit for gaseous discharge lamps |
04/10/1990 | US4916363 For a fluorescent lamp |
04/10/1990 | US4916362 Excitation supply for gas discharge tubes |