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)
04/1999
04/20/1999US5896015 Method and circuit for forming pulses centered about zero crossings of a sinusoid
04/20/1999US5896013 Operating circuit for an inductively ballasted arc discharge lamp
04/20/1999US5895128 Electronic flash and a camera provided with the same
04/15/1999WO1999018760A1 Detection circuit for detecting arc instabilities of a high intensity discharge lamp
04/15/1999WO1999018759A1 Controller for operating a high pressure gas discharge lamp
04/15/1999WO1999018596A1 Discharge lamp, comprising secondary side of piezotransformer as electrode
04/15/1999WO1999008373A3 Voltage regulation scheme for power supply having a voltage-fed inverter
04/14/1999CN2314551Y Electronic transformer for protecting neon
04/14/1999CN2314550Y Inductive ballast for fluorescent tube
04/14/1999CN2314549Y Automatic energy saving fluorescent lamp for A. C. or D. C power supply
04/14/1999CN2314548Y Immediate ignitor for fluorescent tube
04/13/1999US5894202 Ignition device for gas discharge lamps, particularly for motor vehicle lights
04/13/1999US5894184 Drive circuit for driving a piezoelectric transformer capable of decreasing heat developed from electronic parts composing an inverter circuit
04/08/1999WO1999017591A1 Method to prevent spurious operation of a fluorescent lamp ballast
04/08/1999WO1999017590A1 Energy saving lighting controller
04/07/1999EP0907306A1 Discharge lamp turning-on device
04/07/1999EP0907305A1 Method and apparatus for operating discharge lamp
04/07/1999EP0906716A1 Circuit for reversing polarity on electrodes
04/07/1999EP0906715A1 Ballast
04/07/1999CN2313357Y High-power mercury/sodium lamp lighting controller
04/07/1999CN2313356Y Lamp-tube current-limiting device for soft-starting
04/07/1999CN2313355Y Electronic ballast having protection circuit
04/07/1999CN2313354Y Frequently-starting protector for fluorescent lamp
04/07/1999CN2313149Y Multifunction health-care fluorescent lamp
04/07/1999CN1213264A Discharge lamp operating apparatus
04/07/1999CN1213263A Electronic ballast for high-voltage discharge lamp
04/07/1999CN1042881C Switching power supply for operation of electric lamp
04/06/1999US5892999 Zoom lens barrel with shutter mounting unit
04/06/1999US5892646 Ground fault protection of gas lamp power supplies
04/06/1999US5892336 Circuit for energizing cold-cathode fluorescent lamps
04/06/1999US5892335 Gas discharge lamp with active crest factor correction
04/06/1999US5892332 Starter for a high-pressure gas discharge lamp
04/06/1999US5892330 Manually controlable light feedback adjustment device for gas discharge lighting systems
04/06/1999US5892327 Circuit arrangement for operating a discharge lamp
04/01/1999WO1999003311A3 Circuit arrangement
04/01/1999WO1999003310A3 Electronic ballast
03/1999
03/31/1999EP0906003A2 Discharge lamp operating apparatus
03/31/1999EP0905871A2 A.C. to A.C. line frequency power converter
03/31/1999EP0739545B1 Circuit arrangement
03/31/1999CN2312554Y Electronic ballast
03/31/1999CN2312553Y Triple voltage electronic starter for fluorescent lamp
03/31/1999CN1212819A Fluorescent lamp with replaceable light element
03/30/1999US5889373 Fluorescent lamp ballast with current feedback using a dual-function magnetic device
03/30/1999US5889339 Controller and control device for a low-pressure fluorescent lamp
03/25/1999WO1999014992A1 A circuit for synchronizing the ignition of electronic ballast discharge lamps
03/25/1999WO1999014991A2 A ballast for a high intensity discharge lamp
03/25/1999WO1999014990A1 Floating driver having common emitter drive stage
03/25/1999WO1999014988A1 Group dimming system for gas discharge lamps
03/25/1999WO1999009464B1 Low-voltage high-efficiency fluorescent signage, particularly exit sign
03/25/1999DE19843181A1 Circuit arrangement to fire gas discharge flash tube
03/24/1999EP0903968A1 Lighting system
03/24/1999EP0903967A1 An igniter for discharge lamps
03/24/1999EP0903966A1 Lighting system
03/24/1999EP0902965A1 Multiple reflection electrodeless lamp with sulfur or sellenium fill and method for providing radiation using such a lamp
03/24/1999EP0902857A1 Foam core spacer assembly
03/24/1999CN2311914Y 高压钠灯电子镇流器 HPS electronic ballast
03/24/1999CN2311913Y Electronic starter for fluorescent lamp
03/24/1999CN2311912Y Gentle starting lamp tube current limiter
03/24/1999CN1211850A Circuit arrangement with piezoelectric transformer
03/24/1999CN1042686C Power source device
03/23/1999US5886514 Piezoelectric transformer driving curcuit and method capable of stabilizing load current
03/23/1999US5886481 Reduced duty cycle high intensity discharge lamp ignitor
03/23/1999US5886480 Power supply for a difficult to start electrodeless lamp
03/23/1999US5886479 Precession of the plasma torus in electrodeless lamps by non-mechanical means
03/23/1999US5886478 Integral igniter for electrodeless lamps
03/23/1999US5886477 Driver of cold-cathode fluorescent lamp
03/23/1999US5886472 Electrodeless lamp having compensation loop for suppression of magnetic interference
03/23/1999CA2114852C Dimmable high power factor high-efficiency electronic ballast controller integrated circuit with automatic ambient over-temperature shutdown
03/18/1999WO1999001013A3 Apparatus and method for dimming a gas discharge lamp
03/18/1999WO1998053474A3 Non-rotating electrodeless lamp containing molecular fill
03/17/1999EP0902605A1 Discharge lamp lighting device
03/17/1999CN2311114Y Variable frequency electronic ballast for high-pressure sodium lamp
03/17/1999CN2311113Y Glow starter for induction compact energy-saving lamp
03/16/1999US5884105 Zoom compact camera
03/16/1999US5883474 Strobe dimmer of which the luminous intensity and color temperature are controllable
03/16/1999US5883473 Electronic Ballast with inverter protection circuit
03/16/1999US5883472 Circuit for operating a discharge lamp
03/16/1999US5883471 Flashlamp pulse shaper and method
03/16/1999US5883401 Monolithic semiconductor switch and supply circuit component
03/11/1999WO1999012403A1 Circuit arrangement
03/11/1999WO1999012402A1 Circuit arrangement
03/11/1999WO1999012401A1 Circuit for controlling at least one cold cathode fluorescent lamp
03/11/1999WO1999012399A1 Electronic ballast
03/11/1999WO1999012390A2 Circuit arrangement
03/11/1999WO1999012389A2 Circuit arrangement
03/11/1999DE19734885C1 Verfahren zum Erzeugen von Impulsspannungsfolgen für den Betrieb von Entladungslampen und zugehörige Schaltungsanordnung Method for producing pulsed-voltage sequences for the operation of discharge lamps and associated circuitry
03/10/1999EP0901315A1 Discharge lamp lighting equipment and illuminating system
03/10/1999EP0901314A1 Control apparatus for operating and controlling a gas discharge lamp in headlamps
03/10/1999EP0900514A1 Lighting unit, low-pressure mercury discharge lamp, supply unit, and combined packaging
03/09/1999US5880946 Magnetically controlled transformer apparatus for controlling power delivered to a load
03/09/1999US5880937 Electrical circuit arrangement having equipotential surface for reduced high-frequency interference
03/09/1999US5880564 High-frequency operating circuit for a low-pressure discharge lamp with improved electromagnetic compatibility
03/09/1999US5880563 Device for accurately detecting end of usage lifetime of a discharge lamp
03/09/1999US5880562 Fluorescent lamp lighting apparatus
03/09/1999US5880561 Discharge lamp operating apparatus and method for reducing discharge arc curvature
03/04/1999WO1999011102A1 A circuit for igniting a discharge lamp and a method for operating same
03/04/1999WO1999010772A1 Flash unit
03/04/1999DE19737786A1 Schaltungsanordnung zur Ansteuerung wenigstens einer Kaltkathodenfluoreszenzlampe Circuit arrangement for driving at least one cold cathode fluorescent lamp
03/03/1999EP0899991A1 Method and device for feeding discharge lamps with high frequency power using a tuning circuit
03/03/1999EP0899797A2 Circuit with a piezoelectric transformer
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