| Patents for H05B 41 - Circuit arrangements or apparatus for igniting or operating discharge lamps (35,100) |
|---|
| 01/12/1999 | US5859489 Piezoelectric transformer driving circuit |
| 01/11/1999 | CA2241499A1 Electrodeless lamp having compensation loop for suppression of magnetic interference |
| 01/07/1999 | WO1999001013A2 Apparatus and method for dimming a gas discharge lamp |
| 01/07/1999 | EP0889677A2 Lamp drive circuit |
| 01/07/1999 | EP0889676A1 Ballast for dicharge lamp with voltage-controller |
| 01/07/1999 | EP0889675A1 Electronic ballast with lamp tyre recognition |
| 01/07/1999 | EP0888667A1 Circuit arrangement |
| 01/07/1999 | DE19728295A1 Halbbrückenansteuerung ohne Kollektor-Vorstromspitze Half-bridge control without collector Vorstromspitze |
| 01/06/1999 | CN2303429Y Voltage stabilizer for flash lamp charging |
| 01/06/1999 | CN2303428Y Fluorescent lamp electronic ballast having active correcting circuit |
| 01/06/1999 | CN2303427Y Power-factor corrector for electronic ballast |
| 01/06/1999 | CN2303426Y Electronic ballast having device for protection at abnormal stage of neon tube |
| 01/05/1999 | US5856919 Quasiresonant boost power converter with bidirectional inductor current |
| 01/05/1999 | US5856916 Assembly set including a static converter with controlled switch and control circuit |
| 01/05/1999 | US5856728 Power transformer circuit with resonator |
| 12/30/1998 | WO1998059530A1 Flashlamp pulse shaper and method |
| 12/30/1998 | WO1998046054A3 Ballast |
| 12/30/1998 | WO1998046053A3 Anti-flicker scheme for a fluorescent lamp ballast driver |
| 12/30/1998 | WO1998046052A3 Ballast for compact fluorescent lamp with current protection |
| 12/30/1998 | EP0917812A3 Ballast for compact fluorescent lamp with current protection |
| 12/30/1998 | EP0886882A1 Gas discharge lamp, in particular for a motor-vehicle headlight |
| 12/30/1998 | CN2302631Y Stepped starting high-strength gas discharge lamp electronic ballast |
| 12/30/1998 | CN1203510A Lighting apparatus |
| 12/30/1998 | CN1203438A DC fluorescent lamp for lighting in passenger train |
| 12/29/1998 | US5854946 Lens-fitted photo film unit and electronic flash device for use therewith |
| 12/29/1998 | US5854617 Circuit and a method for controlling a backlight of a liquid crystal display in a portable computer |
| 12/29/1998 | US5854543 Inverter circuit for lighting a cold cathode tube by the use of a piezoelectric transformer |
| 12/29/1998 | US5854542 Flashing and diming fluorescent lamps for a gaming device |
| 12/29/1998 | US5854538 Circuit arrangement for electrode pre-heating of a fluorescent lamp |
| 12/24/1998 | DE19725645A1 Pumpstützdrossel Pump supporting inductor |
| 12/23/1998 | WO1998058526A1 Pump support choke |
| 12/23/1998 | WO1998058525A1 Power supply for hybrid illumination system |
| 12/23/1998 | EP0886460A1 Electronic ballast with circuit for detecting rectification by lamp |
| 12/23/1998 | EP0886286A2 High-voltage transformer and a vehicle-lamp lighting-on device using the same |
| 12/23/1998 | EP0885550A1 An electronic ballast for a compact fluorescent lamp |
| 12/23/1998 | EP0800724A4 Lamp oscillator for atomic frequency standards |
| 12/23/1998 | CN2301830Y Heater-type internal trigger for high pressure sodium lamp |
| 12/23/1998 | CN1202792A Electronic ballast fluorescent lamp (energy saving lamp) capable of reliably working at super wide voltage zone |
| 12/23/1998 | CN1041363C Electrodeless low-pressure mercury vapour discharge lamp |
| 12/23/1998 | CA2645395A1 Power supply for hybrid illumination system |
| 12/23/1998 | CA2645394A1 Power supply for hybrid illumination system |
| 12/23/1998 | CA2645393A1 Power supply for hybrid illumination system |
| 12/23/1998 | CA2293455A1 Power supply for hybrid illumination system |
| 12/22/1998 | US5852358 Capactive power circuit |
| 12/22/1998 | US5852343 Fluorescent lamp with adjustable color temperature |
| 12/17/1998 | WO1998057354A1 Fluorescent lamp, compact self-ballasted fluorescent lamp, and lighting equipment |
| 12/16/1998 | EP0884933A2 An ignition transformer for gas discharge bulbs |
| 12/16/1998 | EP0884932A1 Ballast circuit with stabilised oscillator |
| 12/16/1998 | EP0884931A1 Supply circuit for discharge lamps with overvoltage protection |
| 12/16/1998 | EP0883974A2 Fluorescent lamp with replaceable light element |
| 12/15/1998 | USRE35994 Variable control, current sensing ballast |
| 12/15/1998 | US5850127 EBL having a feedback circuit and a method for ensuring low temperature lamp operation at low dimming levels |
| 12/10/1998 | WO1998056213A1 Method and apparatus for improved electrodeless lamp screen |
| 12/10/1998 | WO1998056101A1 Low voltage illumination system |
| 12/09/1998 | EP0883160A1 Mercury-free metal halide discharge lamp, lighting device for such a lamp, and illuminating apparatus using such a lamp |
| 12/09/1998 | CN2300228Y Capacitive ballast |
| 12/08/1998 | US5847910 Fault protection device in a transformer |
| 12/08/1998 | US5847909 Safety-enhanced transformer circuit |
| 12/08/1998 | US5847517 Method and apparatus for igniting electrodeless lamp with ferroelectric emission |
| 12/03/1998 | WO1998054934A1 Control circuit and method for piezoelectric transformer |
| 12/03/1998 | WO1998054933A1 Electronic ballast dimming system |
| 12/03/1998 | WO1998054932A1 Ferroresonant transformer ballast for regulating the current of gas discharge lamps |
| 12/02/1998 | EP0880873A1 Inductively powered lighting |
| 12/02/1998 | EP0880820A2 Circuit arrangement |
| 12/02/1998 | EP0880796A2 Lampholder and lighting unit comprising a lampholder |
| 12/02/1998 | EP0811305B1 Fluorescent tube control and starting aid device |
| 12/02/1998 | EP0772903A4 Multi-resonant inverter |
| 12/02/1998 | CN2299392Y Double D-shape electronic high effective energy saving and long service life fluorescent lamp |
| 12/02/1998 | CN1200865A Circuit arrangement |
| 12/02/1998 | CN1200836A Ballast for discharge lamp and method and apparatus for mfg. same |
| 12/02/1998 | CN1200593A Power factor improving circuit |
| 12/02/1998 | CN1200454A Device and method for light-adjusting for electronic type stabilizer |
| 12/02/1998 | CN1200453A Illumination device |
| 12/01/1998 | US5844540 Liquid crystal display with back-light control function |
| 12/01/1998 | US5844380 Circuit arrangement for ingniting and supplying power to a lamp |
| 12/01/1998 | US5844379 Circuit arrangement for igniting a high pressure discharge lamp |
| 12/01/1998 | US5844378 High side driver technique for miniature cold cathode fluorescent lamp system |
| 12/01/1998 | US5844375 Dual-inverter type operating circuit for generating two AC signals that are respectively provided to two lamp electrodes of a gas discharge lamp |
| 12/01/1998 | US5844374 Inverter arrangement employing resonant capacitive elements directly connected across the switching elements for zero voltage switching |
| 12/01/1998 | US5844373 Power supplying apparatus, a plasma display unit, a method of converting a direct-current voltage and a method of adding two direct-current voltages |
| 11/26/1998 | WO1998053649A2 Ballast |
| 11/26/1998 | WO1998053648A1 Centralized power reducing device, particularly for lighting installations |
| 11/26/1998 | WO1998053647A1 Ignition device for a discharge lamp and method for igniting a discharge lamp |
| 11/26/1998 | WO1998053474A2 Non-rotating electrodeless lamp containing molecular fill |
| 11/26/1998 | DE19821921A1 Control circuit for discharge lamp |
| 11/26/1998 | DE19721149A1 Pulse ignition device for discharge lamp |
| 11/26/1998 | CA2261065A1 Ballast |
| 11/25/1998 | EP0879549A1 Dimmer for fluorescent lighting |
| 11/25/1998 | EP0692154B1 Clocked current supply |
| 11/25/1998 | CN1200230A Circuit arrangement |
| 11/24/1998 | US5842057 Camera with lens barrier apparatus |
| 11/24/1998 | US5842047 Strobe light and photographic camera incorporating the same |
| 11/24/1998 | US5841650 High frequency inverter |
| 11/24/1998 | US5841246 Circuit arrangement for controlling luminous flux of a discharge lamp |
| 11/24/1998 | US5841245 Discharge lamp ignition circuit having a bandpass filter connecting the pulse transformer to the lamp |
| 11/24/1998 | US5841244 RF coil/heat pipe for solid state light driver |
| 11/24/1998 | US5841243 Load matched excitation circuit for an electrodeless lamp including a frequency swept RF excitation source |
| 11/24/1998 | US5841241 System for powering a gas discharge lamp |
| 11/24/1998 | US5841240 Efficient discharge lamp electrode heating circuit operable over wide temperature and power range |
| 11/24/1998 | US5841239 Circuit for dimming compact fluorescent lamps |