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