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)
06/1999
06/17/1999WO1999030539A2 Method and apparatus for power factor correction
06/17/1999WO1999030538A1 Ballast
06/17/1999WO1999019977A3 Converter/inverter full bridge ballast circuit
06/16/1999EP0922376A1 Electronic ballast for gas discharge lamps
06/16/1999EP0922375A1 Universal high intensity discharge (hid) electronic starter
06/16/1999EP0922324A1 Control circuit and method for piezoelectric transformer
06/16/1999EP0824850B1 Dimming controller and method for a fluorescent lamp
06/16/1999CN1219836A Method and apparatus for operating discharge lamp
06/15/1999US5913085 Electronic flash and a camera provided with the same
06/15/1999US5912812 Boost power converter for powering a load from an AC source
06/09/1999EP0920787A2 Ballast
06/09/1999CN2323548Y Power supply circuit for electronic ballast
06/09/1999CN1219093A Ignitor for high voltage discharging lamp
06/09/1999CN1218979A High frequency energy supply device and high frequency electrode-free discharging lamp device
06/09/1999CN1218943A Back lighting lamp for liquid crystal displayer
06/08/1999US5910713 Discharge lamp igniting apparatus for performing a feedback control of a discharge lamp and the like
06/08/1999US5910712 Method and apparatus for reduced discharge lamp driver test time
06/08/1999US5910711 Discharge lamp dimmer circuit with piezo-electric transformer and adjustable capacitor
06/08/1999US5910710 Method and apparatus for powering an electrodeless lamp with reduced radio frequency interference
06/08/1999US5910709 Florescent lamp ballast control for zero -voltage switching operation over wide input voltage range and over voltage protection
06/08/1999US5910708 Gas discharge lamp ballast circuit with complementary converter switches
06/08/1999US5910689 For a fluorescent lamp in a lighting circuit
06/02/1999EP0920240A2 A high-frequency energy supply means, and a high-frequency eletrodeless discharge lamp device
06/02/1999EP0920052A1 Backlight device for a liquid display
06/02/1999EP0919112A1 Centralized power reducing device, particularly for lighting installations
06/02/1999EP0919068A1 Method and apparatus for starting difficult to start electrodeless lamps
06/02/1999EP0821864B1 Device and process for operating a gas discharge lamp
06/02/1999DE19751548A1 Discharge lamp starter transformer has a closed or gap core of electrically non-conductive material
06/02/1999CN2322351Y Detachable energy-saving lamp device
06/01/1999US5909091 Discharge lamp including an integral cathode fall indicator
06/01/1999US5909090 Light-emission controlling apparatus
06/01/1999US5909089 Discharge lamp igniting and operating circuit with a timer controlled output voltage limit
06/01/1999US5909085 Hybrid luminosity control system for a fluorescent lamp
06/01/1999US5908235 Ballast fixture for fluorescent lighting
05/1999
05/27/1999WO1999012390A3 Circuit arrangement
05/27/1999WO1999012389A3 Circuit arrangement
05/26/1999EP0918449A1 Circuit for control of fluorescent lamp
05/26/1999EP0918352A1 Fluorescent lamp, compact self-ballasted fluorescent lamp, and lighting equipment
05/26/1999EP0917812A2 Ballast for compact fluorescent lamp with current protection
05/26/1999EP0917811A1 Triac dimmable compact fluorescent lamp with low power factor
05/26/1999CN1217867A Circuit apparatus
05/26/1999CN1217866A Lighting apparatus, low-voltage mercury gas discharge lamp, power-supply apparatus and combined package
05/25/1999US5907742 Lamp control scheme for rapid warmup of fluorescent lamp in office equipment
05/25/1999US5907725 For detecting a position of a lens of a camera
05/25/1999US5907224 Abnormality detecting circuit for discharge lamp with delayed interruption for undervoltage
05/25/1999US5907223 Two-frequency electronic ballast system having an isolated PFC converter
05/25/1999US5907222 High efficiency backlighting system for rear illumination of electronic display devices
05/25/1999US5907218 Fluorescent lighting assembly with integral ballast
05/20/1999WO1999025159A1 Parallel-storage series-drive electronic ballast
05/20/1999WO1999025158A1 Circuit arrangement
05/20/1999WO1999025001A1 Illumination unit and liquid crystal display device
05/20/1999CA2277187A1 Circuit arrangement
05/20/1999CA2276726A1 Parallel-storage series-drive electronic ballast
05/19/1999EP0917412A2 Self-oscillating circuit with simplified startup circuit
05/19/1999EP0917411A2 Multi-voltage ballast and dimming circuits for a lamp driven voltage transformation and ballasting system
05/19/1999CN2319689Y Starter socket of fluorescent lamp
05/18/1999CA2254392A1 Free-running oscillator circuit with simple starting circuit
05/14/1999WO1999023858A1 Interface for a lamp operating device
05/14/1999WO1999023857A1 Non-thermionic ballast-free energy-efficient light-producing gas discharge system and method
05/14/1999CA2307604A1 Non-thermionic ballast-free energy-efficient light-producing gas discharge system and method
05/12/1999EP0914754A1 Ignition device for a discharge lamp and method for igniting a discharge lamp
05/12/1999EP0788677B1 Transformerless high-voltage generator circuit
05/12/1999DE19748007A1 Schnittstelle für ein Lampenbetriebsgerät Interface for a lamp operating device
05/12/1999CN1216670A Ballast circuit
05/12/1999CN1216433A Cold-cathode tube lighting circuit with protection circuit for piezoelectric transformer
05/11/1999US5903110 Igniting circuit operated by varying the impedance value of the controller
05/11/1999US5903105 Apparatus and method for controlling lighting of fluorescent lamp for refrigerator
05/11/1999US5903091 Discharge lamp
05/06/1999WO1999014991A3 A ballast for a high intensity discharge lamp
05/06/1999EP0698310B1 High frequency ac/ac converter with power factor correction
05/06/1999EP0604643B1 Power supply circuit
05/06/1999DE19849738A1 Pulse generator
05/06/1999DE19843643A1 Firing circuit for discharge lamps
05/06/1999DE19747526A1 Low pressure fluorescent lamp lighting current control device
05/05/1999CN2317595Y Electronic ballast controlled by one-chip computer
05/05/1999CN2317594Y Preheating electronic starter for fluorescent lamp
05/05/1999CN1216211A Circuit arrangement
05/05/1999CN1216210A Discharge lamp turning-on device
05/05/1999CN1216174A Circuit arrangement
05/05/1999CN1215972A Electronic ballast for high-pressure discharge lamp
05/04/1999US5900701 High frequency electronic ballast for lighting
05/04/1999US5900700 Process and circuit arrangement for operating cold cathode discharge lamps
05/04/1999US5900697 Vehicle discharge lamp lighting circuit with current-limiting DC impedance
04/1999
04/28/1999EP0910933A2 Ballast
04/28/1999EP0852895B1 Fixed-cycle power-supply circuit with an at least temporarily active consumer-independent load
04/28/1999CN2316797Y High-power factor durable fluorescent lamp electronic ballast
04/28/1999CN2316796Y Contact aid for glow starter
04/28/1999CN1215541A 镇流器 Ballast
04/27/1999US5898278 Series resonant lamp circuit having direct electrode connection between rectifier and AC source
04/27/1999US5898277 Apparatus for controlling illumination of a fluorescent lamp
04/27/1999US5898274 Integrated starter and regulator for fluorescent tubes
04/22/1999WO1999020084A1 Supply circuit for a fluorescent tube installation
04/22/1999WO1999020083A1 Ground fault protection circuit
04/22/1999WO1999019977A2 Converter/inverter full bridge ballast circuit
04/21/1999EP0910229A2 Cold-cathode tube lighting circuit with protection circuit for piezoelectric transformer
04/21/1999CN2315756Y Electronic ballast for high voltage sodium lamp
04/21/1999CN2315755Y Low harmonic high power factor electronic ballast with abnormal protection
04/21/1999CN2315643Y Energy saving self starting thin tube high efficiency fluorescent lamp ballast
04/20/1999US5896288 Converter housing
04/20/1999US5896120 Preventing noise in a coordinate input device by reducing or suspending backlight oscillation voltage
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