Patents for H05B 41 - Circuit arrangements or apparatus for igniting or operating discharge lamps (35,100) |
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05/13/1998 | EP0840992A1 Circuit arrangement |
05/13/1998 | CN1181687A Ignition method and igniting device of high pressure discharge lamp |
05/12/1998 | US5752102 Electronic flashing device |
05/12/1998 | US5752084 Lens-fitted photo film unit and electronic flash device for use therewith |
05/12/1998 | US5751523 Secondary ground fault protected luminous tube transformer for mid-point connected luminous tubes |
05/12/1998 | US5751121 High voltage discharge bulb control |
05/12/1998 | US5751120 DC operated electronic ballast for fluorescent light |
05/12/1998 | US5751118 Universal input dimmer interface |
05/12/1998 | US5751117 Modular fluorescent track lighting |
05/12/1998 | US5751116 Apparatus to retrofit an HID light fixture |
05/12/1998 | US5751115 Lamp controller with lamp status detection and safety circuitry |
05/12/1998 | US5751104 Compact fluorescent lamp having a helical lamp envelope |
05/12/1998 | US5751092 Piezoelectric transformer and power converting apparatus employing the same |
05/07/1998 | WO1998019348A1 Converter with piezoceramic transformer |
05/07/1998 | DE19644993A1 Circuit arrangement for controlling two brightness stages of gas-discharge lamps |
05/07/1998 | DE19644971A1 Constant light arrangement for multiple lighting devices e.g. in work-places and rooms |
05/06/1998 | EP0840537A1 Electronic ballast for high-intensity discharge lamps |
05/06/1998 | EP0839438A1 Ballast |
05/06/1998 | EP0839437A1 Circuit arrangement |
05/06/1998 | EP0839436A1 Method for operating a lighting system and suitable lighting system therefor |
05/06/1998 | EP0733266B1 Process for operating an incoherently emitting radiation source |
05/06/1998 | CN2281054Y 高效电子镇流器 Efficient electronic ballasts |
05/06/1998 | CN2280838Y Junction box for daylight lamp |
05/06/1998 | CN1180988A Ballast IC with shut-down function |
05/06/1998 | CN1180987A Lamp power supply circuit with feedback circuit for dynamically adjusting lamp current |
05/06/1998 | CN1180986A High voltage IC-driven half-bridge gas discharge lamp ballast |
05/06/1998 | CN1180985A Discharge lamp operating apparatus and method |
05/05/1998 | US5748460 Power supply apparatus |
05/05/1998 | US5747947 Gain controlled control signal based on sensed lamp current |
05/05/1998 | US5747946 Gas discharge lamps and systems |
05/05/1998 | US5747944 Flash device having plural emission modes in one of which a flash inductor is selectively short-circuited |
05/05/1998 | US5747943 MOS gate driver integrated circuit for ballast circuits |
05/05/1998 | US5747942 Inverter for an electronic ballast having independent start-up and operational output voltages |
05/05/1998 | US5747941 Electronic ballast that monitors direct current through lamp filaments |
05/05/1998 | US5747937 Two-level security lighting system |
05/05/1998 | US5747841 Circuit arrangement, and junction field effect transistor suitable for use in such a circuit arrangement |
05/05/1998 | CA2118933C Power supply circuit |
04/30/1998 | WO1998018298A1 Inverter circuits |
04/30/1998 | WO1998018297A1 High-pressure discharge lamp with an auxiliary ignition electrode as well as circuitry and process for operation |
04/30/1998 | WO1998018296A1 A power control apparatus for lighting systems |
04/30/1998 | DE19736894A1 Integrierte Treiberschaltung Driver IC |
04/30/1998 | DE19644115A1 Schaltungsanordnung zum Betrieb einer Hochdruckentladungslampe sowie Beleuchtungssystem mit einer Hochdruckentladungslampe und einem Betriebsgerät für die Hochdruckentladungslampe Circuit arrangement for operating a high pressure discharge lamp and lighting system comprising a high pressure discharge lamp and an operating device for the high-pressure discharge lamp |
04/30/1998 | CA2200680A1 Electronic ballast for high-intensity discharge lamps |
04/29/1998 | EP0838132A1 Dimmable ballast |
04/29/1998 | EP0838131A1 Ballast circuit |
04/29/1998 | EP0838130A1 Power supply for feeding and igniting a gas discharge lamp |
04/29/1998 | EP0838129A1 Electronic ballast |
04/29/1998 | EP0838128A1 Circuit arrangement |
04/29/1998 | EP0838082A2 Integrated hid reflector lamp |
04/29/1998 | EP0838081A2 High-pressure discharge lamp |
04/28/1998 | US5744916 Discharge tube lighting apparatus |
04/28/1998 | US5744915 Electronic ballast for instant-start lamps |
04/28/1998 | US5744913 Fluorescent lamp apparatus with integral dimming control |
04/28/1998 | US5744912 Electronic ballast having an oscillator shutdown circuit for single or multiple fluorescent tubes for lamps |
04/28/1998 | CA2126172C Luminaire_with interference reduction |
04/28/1998 | CA2112304C Gas discharge image display |
04/23/1998 | WO1998017085A1 A power distribution system |
04/23/1998 | WO1998017084A1 Inductive-resistive fluorescent apparatus and method |
04/23/1998 | WO1998017081A2 Direct current gas discharge lamp starter and direct current gas discharge lamp instant start ballast |
04/23/1998 | DE19642947A1 Gleichstrom-Gasentladungslampenstarter und Gleichstrom-Vorschaltgerät für eine Gasentladungslampe DC gas discharge lamp starter and DC ballast for a gas discharge lamp |
04/23/1998 | CA2266507A1 Inductive-resistive fluorescent apparatus and method |
04/22/1998 | EP0837620A2 Operating method and operating apparatus for a high pressure discharge lamp |
04/22/1998 | EP0836794A1 Inverter |
04/22/1998 | EP0836793A1 Power supply for feeding and igniting a discharge lamp |
04/22/1998 | EP0836792A1 Ballast |
04/22/1998 | CN2279759Y Fluorescent lamp starter |
04/22/1998 | CN1179693A Lamp ballast circuit with cathode preheat function |
04/21/1998 | US5742497 Cold-cathode fluorescent lamp lighting device |
04/21/1998 | US5742134 Inverter driving scheme |
04/21/1998 | US5742132 Method and system for starting and operating a discharge lamp |
04/21/1998 | US5742131 Dimmable ballast control circuit |
04/16/1998 | WO1998015985A1 Piezo-electric transformer |
04/16/1998 | DE19646861C1 Vorrichtung zum Betreiben einer Gasentladungslampe Device for operating a gas discharge lamp |
04/15/1998 | EP0836368A2 Hot relight system for electrodeless high intensity discharge lamps |
04/15/1998 | EP0836113A2 Lens-fitted film unit with electronic flash |
04/15/1998 | EP0835598A1 Single switch ballast with integrated power factor correction |
04/15/1998 | CN2279046Y Electronic light-controlling ballast for fluorescent lamp |
04/15/1998 | CN1179258A Power supply for light sources, particularly for quick ignition of fluorescent lamps and the like |
04/15/1998 | CN1179257A Voltage booster |
04/14/1998 | US5740021 Switching power supply for the operation of electric lamps |
04/14/1998 | US5739679 Cold cathode tube lighting device using piezoelectric transformer |
04/14/1998 | US5739645 For powering a lamp |
04/14/1998 | US5739644 Discharge lamp typically a sodium high-pressure discharge lamp, from an a-c power network |
04/14/1998 | US5739643 Device for supplying electric power to flashlamp and method thereof |
04/14/1998 | US5739640 Low line voltage detection control module and method for a fluorescent lamp |
04/14/1998 | US5739622 Converter wherein a piezoelectric transformer input signal is frequency modulated by a pulse width modulated signal |
04/14/1998 | US5739555 Amplifying-gate thyristor with an increased hold current |
04/14/1998 | US5738780 Voltage converter for water treatment system UV bulb |
04/08/1998 | EP0835044A2 Lamp ballast circuit with cathode preheat function |
04/08/1998 | EP0834241A1 Circuit arrangement |
04/08/1998 | EP0834213A1 Switch mode power supply |
04/08/1998 | EP0834187A1 Electrodeless low-pressure discharge lamp |
04/08/1998 | CN1178623A Circuit arrangement |
04/08/1998 | CN1178444A Gas discharge lamp ballast circuit with complementary converter switches |
04/07/1998 | US5737207 Power supply |
04/07/1998 | US5736819 Parallel-tuned electronic ballast with special output voltage waveform |
04/07/1998 | US5736817 Preheating and starting circuit and method for a fluorescent lamp |
04/02/1998 | WO1998014035A1 Arrangement for determining the state of a high-pressure gas discharge lamp on switching-on |
04/01/1998 | EP0833548A1 Light source lamp unit, light source device, and projection display device |
04/01/1998 | EP0833372A2 Starting flag structure for tubular low pressure discharge lamps |