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)
04/1998
04/01/1998CN1178062A Discharge lamp lighting device
04/01/1998CN1177899A Starter for discharging lamp
03/1998
03/31/1998US5734232 For operating a low-pressure discharge lamp
03/31/1998US5734231 Instant lighting type fluorescent lamp lighting circuit
03/31/1998US5734230 Fail-safe lighting system with load shedding and dimming
03/26/1998WO1998012901A1 Fluorescent lamp illumination level control
03/26/1998WO1997042650A3 High-pressure discharge lamp
03/25/1998EP0831678A2 High voltage IC-driven half-bridge gas discharge lamp ballast
03/25/1998EP0831677A2 Electronic ballast for fluorescent lamp
03/25/1998EP0831517A2 Dielectric barrier discharge device
03/25/1998EP0830982A2 Lighting circuit device for automobile
03/25/1998EP0830809A1 Phase control circuit having independent half cycles
03/25/1998EP0830808A1 Circuit arrangement
03/25/1998CN2277159Y 电子镇流器 Electronic Ballast
03/24/1998US5731667 Hybrid sequence start ballast for an instant start discharge lamp
03/24/1998US5731666 Integrated-magnetic filter having a lossy shunt
03/24/1998US5731665 Power regulator for fluorescent lamp
03/24/1998US5731652 Power source unit employing piezoelectric transformer frequency-controlled and voltage-controlled to operate at a maximum efficiency
03/19/1998WO1998011763A1 Circuit arrangement
03/19/1998WO1998011762A1 Circuit arrangement
03/18/1998CN2276698Y DC. Fluorescent lamp with long. service life
03/18/1998CN1176733A Fluorescent tube control and starting aid device
03/17/1998US5729098 Power supply and electronic ballast with a novel boost converter control circuit
03/17/1998US5729097 Method and device for controlling electric discharge lamps with electronic fluorescent lamp ballasts
03/17/1998US5729096 Inverter protection method and protection circuit for fluorescent lamp preheat ballasts
03/17/1998US5729095 Power supply for a rare gas discharge lamp
03/17/1998US5727861 Flash emitting apparatus
03/12/1998WO1998010624A1 Circuit arrangement
03/12/1998WO1998010623A1 Circuit arrangement
03/12/1998DE19738240A1 Ballast for gas discharge lamp
03/12/1998DE19719168A1 Power supply with high frequency source that converts DC into AC
03/11/1998EP0828409A2 Apparatus for detecting luminous tube and power supply faults where ground fault currents may be absent
03/11/1998EP0828408A2 Ballast circuit for gas discharge lamp
03/11/1998EP0828407A1 Gas discharge lamp ballast circuit with complementary converter switches
03/10/1998US5726900 Ground detection circuit for a three wire power supply
03/10/1998US5726598 Semiconductor device having voltage sensing element
03/10/1998US5726537 Circuit for pulsed operation of a discharge lamp
03/10/1998US5726536 Method of driving a cold cathode tube using a ceramic transformer
03/10/1998US5726534 Preheat current control circuit based upon the number of lamps detected
03/06/1998CA2215099A1 Apparatus for detecting luminous tube and power supply faults where ground fault currents may be absent
03/06/1998CA2213600A1 Ballast circuit for gas discharge lamp
03/05/1998WO1998009484A1 Electric supply for a low pressure discharge lamp
03/05/1998WO1998009483A1 Electronic ballast for gas discharge lamps
03/05/1998WO1998009482A1 Universal high intensity discharge (hid) electronic starter
03/05/1998WO1998009369A1 Control circuit and method for piezoelectric transformer
03/05/1998WO1998009317A1 Glowswitch starter
03/05/1998DE19634850A1 Elektronisches Vorschaltgerät für Gasentladungslampen Electronic ballast for gas discharge lamps
03/04/1998EP0827370A2 Resonance type power converter unit, lighting apparatus for illumination using the same and method for control of the converter unit and lighting apparatus
03/04/1998EP0827184A2 Compact electrodeless fluorescent a-line lamp
03/04/1998CN1175184A Power source equipment
03/03/1998US5724620 Wireless light-amplifying strobe system and strobe device usable with the system
03/03/1998US5723997 Interface circuit of an electronic flash unit
03/03/1998US5723953 High voltage IC-driven half-bridge gas discharge lamp ballast
03/03/1998US5723952 Rare gas discharge fluorescent lamp device
03/03/1998US5723951 Method of hot restarting a high intensity discharge lamp
03/03/1998US5723943 Apparatus for generating light
02/1998
02/25/1998EP0825808A2 Discharge lamp operating apparatus and method
02/25/1998EP0825807A2 Operating apparatus for discharge lamp
02/25/1998EP0825688A2 Electronic ballast for rail mounted lamps
02/25/1998EP0824850A1 Dimming controller and method for a fluorescent lamp
02/25/1998EP0824849A1 Arrangement for detecting the ignition of a high-pressure gas discharge lamp
02/25/1998EP0824848A1 Output control system for an a.c. high-pressure gas-discharge lamp intended in particular for motor vehicles
02/25/1998EP0824761A1 Discharge lamp and device for operating it
02/25/1998CN2275320Y Electronic balast for multiple lamp tube off and on in turn
02/25/1998CN1174652A Circuit for operating discharge lamp
02/25/1998CN1174488A Fluorescent lamp lighting device
02/24/1998US5721986 Camera and strobe charging system
02/24/1998US5721971 Wireless slave electronic photoflash device
02/24/1998US5721471 Lighting system for controlling the color temperature of artificial light under the influence of the daylight level
02/19/1998WO1998007301A1 Circuit arrangement
02/19/1998WO1998007300A1 Method and device for the modulation of the intensity of fluorescent lamps
02/19/1998WO1998007182A1 Method and apparatus for starting difficult to start electrodeless lamps
02/19/1998DE19735132A1 Cold cathode fluorescent lighting tube e.g. for motor vehicle measurement instruments
02/19/1998DE19632282A1 Verfahren und Einrichtung zur Helligkeitssteuerung von Leuchtstofflampen Method and apparatus for controlling the brightness of fluorescent lamps
02/18/1998EP0824300A1 Inverter for the power supply of discharge lamps with means for improving the power factor
02/18/1998CN2274859Y Eliminator for arc flash of electronic ballast for metal halide lamp
02/18/1998CN2274858Y Block style neon for self assembling
02/18/1998CN1173963A Bollast system
02/18/1998CN1173962A Ballast system
02/17/1998US5719474 Fluorescent lamps with current-mode driver control
02/17/1998US5719473 High frequency operating circuit with in-rush current protection for operation of discharge lamps
02/17/1998US5719472 High voltage IC-driven half-bridge gas discharge ballast
02/17/1998US5719471 Three-way dimming circuit for compact fluorescent lamp
02/12/1998DE19632190A1 Vehicle headlight array
02/11/1998EP0823147A1 Circuit arrangement
02/11/1998EP0565670B1 Circuit for driving a gas discharge lamp load
02/11/1998CN2274400Y Ballast for fluorescent lamp
02/11/1998CN2274399Y Full-trip type fire-retardant ballast
02/11/1998CN1173106A Diodeless start circuit for gas discharge lamp
02/11/1998CN1173065A Circuit arrangement
02/10/1998US5717964 Camera exposure apparatus having flash tubes for correcting for overexposure
02/10/1998US5717962 Electric flash apparatus using MOS controlled thyristor
02/10/1998US5717295 Lamp power supply circuit with feedback circuit for dynamically adjusting lamp current
02/10/1998US5717290 Starting flag structure for tubular low pressure discharge lamps
02/10/1998US5716225 Electrical assembly with dual voltage electrical connector between ballast and high intensity discharge lamp fixture
02/10/1998US5716128 Power takeoff and lighting unit for fluorescent fixture
02/04/1998EP0822577A2 Discharge lamp assembly
02/04/1998EP0822563A2 Ignition device for a gas discharge lamp in a motor vehicle
02/04/1998EP0821864A1 Device and process for operating a gas discharge lamp
02/04/1998EP0821863A1 Field controlled plasma discharge printing device
1 ... 270 271 272 273 274 275 276 277 278 279 280 281 282 283 284 285 286 287 288 289 290 ... 351