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)
09/1998
09/01/1998US5801491 Supply circuit for discharge lamps with means for preheating the electrodes
08/1998
08/26/1998EP0861017A2 Photodetector of liquid crystal display and luminance control device using the same
08/26/1998EP0860098A1 Circuit arrangement
08/26/1998EP0860097A1 Circuit arrangement
08/26/1998EP0860096A1 Circuit arrangement
08/26/1998EP0636284B1 Power supply
08/26/1998CN2289371Y Switch for fluorescent lamp
08/26/1998CN2289369Y Gas discharge lamp inverter
08/25/1998US5798620 Fluorescent lamp dimming
08/25/1998US5798618 Electrodeless discharge lamp with control amalgam in the plasma
08/25/1998US5798617 Magnetic feedback ballast circuit for fluorescent lamp
08/25/1998US5798616 Fluorescent lamp circuit
08/25/1998US5798615 Universal high intensity discharge electronic starter
08/25/1998US5798614 Fluorescent lamp filament drive technique
08/21/1998CA2198173A1 Micro-controller-operated high intensity discharge lamp ballast system and method
08/20/1998WO1998036623A1 Circuit arrangement
08/20/1998WO1998036622A1 Circuit arrangement
08/20/1998WO1998036621A1 Lighting unit, low-pressure mercury discharge lamp, supply unit, and combined packaging
08/20/1998WO1998025442A3 Industrial voltage ballast circuit with passive power factor correction
08/20/1998DE19805733A1 Integrated driver circuit for AC supply to fluorescent lamp
08/20/1998DE19805732A1 Control method for output power of fluorescent lamps
08/20/1998DE19728847C1 Voltage regulated electronic starter unit for gas discharge lamp especially fluorescent lamp
08/19/1998EP0858724A1 Circuit arrangement
08/19/1998EP0858723A1 Superimposed-pulsed ignition device
08/19/1998EP0791282B1 Device for operating a gas discharge lamp
08/19/1998EP0641511B1 Lighting arrangement with variable luminous intensity and colour
08/19/1998CN2288571Y Metallic halide lamp ballast for fishing
08/19/1998CN2288570Y Combined neon lamp electronic scanner
08/19/1998CN1191061A Method for operating a lighting system and suitable lighting system therefor
08/18/1998US5796216 Electronic ignition enhancing circuit having both fundamental and harmonic resonant circuits as well as a DC offset
08/18/1998US5796215 Soft start circuit for self-oscillating drivers
08/18/1998US5796214 Ballast circuit for gas discharge lamp
08/18/1998US5796213 Inverter power source apparatus using a piezoelectric transformer
08/18/1998US5796210 Circular fluorescent lamp unit and lighting apparatus
08/18/1998CA2032943C Digital controller for gas discharge tube
08/13/1998WO1998035538A1 Method for determining the resonance frequency of an electric resonant circuit
08/13/1998WO1998035537A1 A drive circuit arrangement for a gas discharge lamp
08/13/1998WO1998035536A1 Discharge lamp turning-on device
08/13/1998WO1998035434A1 Control circuit and method for piezoelectric transformer
08/13/1998CA2280030A1 A drive circuit arrangement for a gas discharge lamp
08/12/1998EP0858165A1 IC for implementing the function of a DIAC diode
08/12/1998CN2287771Y 电子整流器 Electronic ballasts
08/12/1998CN1190523A 镇流器 Ballast
08/12/1998CN1190522A 镇流器 Ballast
08/12/1998CN1190521A Power supply for feeding and igniting discharge lamp
08/06/1998WO1998034438A1 Electronic ballast with lamp current valley-fill power factor correction
08/06/1998DE19715253A1 Ballast equipment for gas discharge lamps
08/06/1998DE19702687C1 Anordnung zum Schutz gegen Übertemperatur eines Steuergeräts für Gasentladungslampen Arrangement for protection against overtemperature a control unit for gas discharge lamps
08/05/1998EP0856241A1 Methods of controlling the brightness of a glow discharge
08/05/1998EP0856240A1 Circuit arrangement for igniting of high-pressure gas discharge lamps
08/05/1998CN2287358Y Self ignition energy saving fluorescent tube
08/05/1998CN2287336Y Two purpose pull switch
08/05/1998CN1039467C Circuit arrangement
08/04/1998US5789871 Series-capacitor electronic ballast
08/04/1998US5789866 Electronic ballast with reversely wound filament winding
08/04/1998US5789855 Amalgam Positioning in an electrodeless fluorescent lamp
08/04/1998US5789850 DC glow discharge lamp, and ignition apparatus, flood-light apparatus and projector apparatus for dc glow discharge lamp
08/04/1998US5788533 Ballast system for interconnection with fluorescent lamps and the like
08/04/1998CA2049075C Remote control of fluorescent lamp ballast using power flow interruptioncoding with means to maintain filament voltage substantially constant as the lamp voltage decreases
07/1998
07/30/1998WO1998033360A1 Overheating protection device for a control device in gas discharge lamps
07/30/1998DE19801132A1 Power supply circuit for discharge lamp e.g. for vehicle headlamp unit
07/30/1998DE19717307C1 Method of dimming fluorescent lamp in secondary circuit of transformer
07/30/1998DE19702285A1 Fluorescent lamp for operating on low current
07/29/1998EP0855852A2 Device for adapting the power supplied to a discharge lamp
07/29/1998EP0855851A2 Discharge lamp unit
07/29/1998EP0855850A1 A power supply for discharge lamps with balanced resonant circuit
07/29/1998EP0855132A1 Circuit arrangement
07/29/1998CN2286951Y Ultra-low-voltage electronic ballast starter
07/29/1998CN2286822Y Self-carrying power-supply type emergency lamp
07/29/1998CN1189242A Electrodeless low-pressure discharge lamp
07/28/1998US5786903 Multi-power control system for scanners
07/28/1998US5786801 Back light control apparatus and method for a flat display system
07/28/1998US5786671 Electronic ballast circuit having voltage reducing transformer
07/28/1998US5786670 High-frequency converter for fluorescent lamps using an improved trigger circuit
07/23/1998WO1998025441A3 Circuit arrangement
07/22/1998EP0853778A1 Analogue function network for selecting a characteristic curve
07/22/1998EP0572567B1 Phase-controlled power modulation system
07/22/1998CN1188587A Single switch ballast with integrated power factor correction
07/22/1998CN1039272C Push-pull dc-to-ac converter
07/21/1998US5783933 Switching supply device
07/21/1998US5783911 Circuit arrangement for operating electric lamps, and operating method for electric lamps
07/21/1998US5783908 Lighting circuit wherein the abnormality detection circuit gets its power directly from the auxiliary power supply section
07/21/1998US5783802 Vertically lifted portable electric furnace and method for use thereof
07/17/1998CA2195349A1 Lighting network system
07/16/1998DE19801133A1 Control circuit with protection circuit for discharge lamp
07/15/1998EP0853446A2 Flash circuit for low cost cameras
07/15/1998EP0853445A1 Controllable or dimmable electronic ballast provided with a lamp power measurement
07/15/1998EP0852895A1 Fixed-cycle power-supply circuit with an at least temporarily active consumer-independent load
07/15/1998EP0852894A1 Thermally-protected control apparatus containing electrical components
07/15/1998EP0852893A1 Control device for the fast striking of a high-pressure gas discharge lamp
07/15/1998EP0852892A1 Method and device for controlling the power of a high-pressure gas-discharge lamp
07/15/1998CN2286363Y Light modulating and ballast plate for fluorescent lamp
07/15/1998CN1187747A Capacitive ballast for high-pressure sodium lamp
07/14/1998US5781804 Single touch flash charger circuit with timer control
07/14/1998US5781418 Switching scheme for power supply having a voltage-fed inverter
07/14/1998US5780976 Constant-voltage automatic charging strobe circuit
07/14/1998US5779347 Apparatus and method for controlling lighting of fluorescent lamp for refrigerator
07/09/1998WO1998029824A1 Apparatus for providing a nonlinear response
07/09/1998WO1998022973A3 Lampholder and lighting unit comprising a lampholder
07/08/1998EP0852455A2 Vehicle lighting drive apparatus
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