Patents
Sitemap › H05 - Electric techniques not otherwise provided for › H05B - Electric heating; Electric lighting not otherwise provided for › H05B 41 - Circuit arrangements or apparatus for igniting or operating discharge lamps
Patents for H05B 41 - Circuit arrangements or apparatus for igniting or operating discharge lamps (35,100)
10/1991
10/17/1991DE4011742A1 Push pull AC inverter circuit - has alternating transistors with base drive current ratio set by capacitive divider
10/16/1991CN2086962U Capcitor-type trigger of fluoerescent lamp
10/16/1991CN1014378B Gas discharge lamp with excitation source
10/15/1991US5057752 Circuit arrangement for igniting and operating gas-discharge lamps
10/15/1991US5057751 Protective coating for high-intensity metal halide discharge lamps
10/15/1991US5057750 Two-stage resonant starting circuit for an electrodeless high intensity discharge lamp
10/15/1991US5057749 Electronic power factor correction for ballasts
10/15/1991US5057748 Power supply circuit for gas discharge tube
10/15/1991US5057747 Arc lamp stabilization
10/15/1991US5057746 Current sensing relay
10/15/1991US5057745 Low-pressure discharge lamp driving circuit
10/09/1991EP0450831A2 Circuit for operating a gas discharge lamp
10/09/1991EP0450799A2 Remote control transmit-receive system
10/09/1991EP0450728A2 Fluorescent lamp ballast operable from two different power supplies
10/09/1991EP0450523A1 High pressure metal vapor discharge lamp
10/09/1991EP0450024A1 Preheater circuit for fluorescent lamps
10/08/1991US5055993 Invertor apparatus
10/08/1991US5055747 Self-regulating, no load protected electronic ballast system
10/08/1991US5055746 Remote control of fluorescent lamp ballast using power flow interruption coding with means to maintain filament voltage substantially constant as the lamp voltage decreases
10/08/1991US5055745 Fluorescent lamp stabilizer circuit device
10/08/1991US5055742 Gas discharge lamp dimming system
10/07/1991CA2039625A1 Fluorescent lamp ballast operable from two different power supplies
10/02/1991EP0449667A2 Digital controller for gas discharge tube
10/02/1991EP0449639A2 Biasing system for reducing ion loss in lamps
10/02/1991EP0449224A1 Apparatus for operating discharge lamp
10/02/1991EP0449168A2 Improved fluorescent lamp system
10/02/1991EP0449127A1 Circuit for operating a fluorescent lamp from a DC supply
10/02/1991EP0448787A2 Electronic flash apparatus for reducing the incidence of human eyelid closures during exposure
10/02/1991DE4109344A1 Operating discharge lamps esp. HP lamps for large spaces - superimposing wide band of higher frequencies on basic drive frequency to give smooth running of discharge lamps
10/02/1991DE4010435A1 Mains connection device for fluorescent lamp - has inverse regulator for prodn. of constant operating voltage, and electronic switch in series branch to load in series with diode
10/02/1991CN2086036U Ballast for high-frequency non-contact induction type emergency fluorescent lamp
10/02/1991CN2086035U Controller for fluorescent tube
10/02/1991CN2086034U Durable energy-saving ballast
10/02/1991CN2086001U Pull switch with glow starting performance
10/02/1991CN2086000U Energy-saving pull switch with glow starting function of fluorescent lamp
10/01/1991US5053933 Fluorescent lamp
10/01/1991US5053802 Electric flash apparatus
10/01/1991US5053683 Starting and operating device for controlling a starter that ignites a sodium lamp
10/01/1991US5053682 Power supply for microwave discharge light source
10/01/1991US5053681 Remote electrical converter
10/01/1991US5053676 High-pressure discharge lamp
09/1991
09/30/1991CA2037886A1 Biasing system for reducing ion loss in lamps
09/28/1991CA2039042A1 Fluorescent lamp system
09/26/1991DE4009108A1 Thermocouple setting appts. e.g. for potentiometer or valve - uses wire under spring tension wound around core
09/25/1991EP0447957A2 Compact fluorescent lamp
09/25/1991EP0447852A2 Luminaire for an electrodeless high intensity discharge lamp with electromagnetic interference shielding
09/25/1991CN2085590U Auto-control flash low voltage fluorescent lamp
09/25/1991CN2085558U Pulling switch without starter for fluorescent lamp
09/25/1991CN1054878A Electronically light-regulating fluorescent lamp (circuit) having continuous and high-effective charateristics
09/24/1991US5051768 Electronic flash apparatus for reducing the incidence of human eyelid closures during exposure
09/24/1991US5051667 Arc interrupting lamp ballast
09/24/1991US5051666 Circuit for starting and operating a gas discharge lamp
09/24/1991US5051665 Fast warm-up ballast for arc discharge lamp
09/24/1991US5051664 Ignitor circuit for discharge lamps with novel ballast
09/24/1991US5051662 Fluorescent lamp system
09/24/1991US5051661 Protective circuit for fluorescent lamp stabilizer
09/24/1991US5051660 Circuit arrangement for operating a gas discharge lamp on a direct-current source
09/22/1991CA2012880A1 Ballast
09/20/1991CA2102712A1 Compact fluorescent lamp
09/20/1991CA2038452A1 Compact fluorescent lamp
09/18/1991EP0447136A2 A method for automatic switching and control of lighting
09/18/1991EP0447010A1 Method and device for pulsed operation of high-pressure discharge lamps
09/18/1991EP0447009A1 Method for pulsed operation of high-pressure discharge lamps
09/18/1991EP0250464B1 Wide band, high efficiency simmer power supply for a laser flashlamp
09/18/1991CN2085140U Ballast for hight-pressure discharge lamp with classable regulation in brightness
09/18/1991CN2085137U Universal fluorescent lamp ballast
09/18/1991CN2085136U Fluorescent lamp ballast with brightness regulation by capacitor
09/18/1991CN2085135U Electronic ballast type fluorescent lamp
09/18/1991CN2085134U Efficient electronic ballast for two lamps
09/18/1991CN2085133U Autotransformer-type ballast
09/18/1991CN1054697A Non-damage starting device of fluorescent lamp
09/18/1991CN1014006B Display device with lighting
09/17/1991US5049790 Method and apparatus for operating at least one gas discharge lamp
09/17/1991US5049789 Electronic capacitive ballast for fluorescent and other discharge lamps
09/17/1991US5049788 Lighting device of fluorescent lamp
09/17/1991US5049787 Controlled electronic ballast
09/17/1991US5049783 Electronic ballast device for fluorescent lamps
09/17/1991CA1289184C Power supply
09/11/1991EP0445882A2 Switching arrangement
09/11/1991EP0445757A2 Electric discharge lamp unit
09/11/1991CN2084707U 高频电子荧光灯 High-frequency electronic fluorescent
09/11/1991CN2084706U Starter of fluorescent lamp
09/11/1991CN2084705U Electronic starter
09/11/1991CN2084704U Long life starter of fluorescent lamp
09/11/1991CN2084650U Switch for prolonging the life of daylight lamp
09/11/1991CN1054518A Multifunctional glow starter for fluorescent lamp
09/11/1991CN1013917B Pulsating electronic light source
09/10/1991US5047696 Power-limited ceiling lighting system
09/10/1991US5047695 Direct current (DC) acoustic operation of xenon-metal halide lamps using high-frequency ripple
09/10/1991US5047694 Lamp starting circuit
09/10/1991US5047693 Starting aid for an electrodeless high intensity discharge lamp
09/10/1991US5047692 Integrated tuning capacitor network and heat sink for an electrodeless high intensity discharge lamp ballast
09/10/1991US5047691 High-pass t-networks with integral transformer for gaseous discharge lamps
09/10/1991US5047690 Inverter power supply and ballast circuit
09/10/1991US5047689 Gas discharge tube, indirectly heated cathode for use therein and drive circuit therefor
09/10/1991CA1288803C Bi-level ballast circuit for operating hid lamps
09/09/1991CA2037595A1 Switching arrangement
09/05/1991WO1991013530A1 Apparatus for regulating the intensity of light emitted by a lamp
09/04/1991EP0444635A1 Illumination control apparatus
09/04/1991CN2084269U Electronic glow stating ballast for energy saving fluorescent rare-earth lamp
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