| Patents for H05B 41 - Circuit arrangements or apparatus for igniting or operating discharge lamps (35,100) |
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| 06/05/1997 | DE19544838A1 Zündvorrichtung für eine Hochdruck-Gasentladungslampe Ignition device for a high-pressure gas discharge lamp |
| 06/04/1997 | CN2255694Y Alternating ballast device |
| 06/03/1997 | US5636111 Ballast shut-down circuit responsive to an unbalanced load condition in a single lamp ballast or in either lamp of a two-lamp ballast |
| 06/03/1997 | US5635800 Ballast circuit with a japped transformer flyback converter providing driving energy for start, glow and run modes of a lamp |
| 06/03/1997 | US5635799 Lamp protection circuit for electronic ballasts |
| 05/29/1997 | WO1997019578A1 Circuit arrangement |
| 05/29/1997 | WO1997019574A2 Process and circuit arrangement for operating cold cathode discharge lamps |
| 05/29/1997 | CA2210879A1 Circuit arrangement |
| 05/29/1997 | CA2210878A1 Process and circuit arrangement for operating cold cathode discharge lamps |
| 05/28/1997 | EP0776148A1 Safety circuit for a ballast in a fluorescent lamp |
| 05/28/1997 | EP0754400A4 Rf driven sulfur lamp |
| 05/28/1997 | DE19608649C1 Device for recognition of firing of high pressure gas discharge lamp for car headlamp |
| 05/28/1997 | DE19543851A1 Schaltung zum Zünden einer Hochdruck-Gasentladungslampe A circuit for igniting a high-pressure gas discharge lamp |
| 05/28/1997 | CN2255130Y LC type ballast |
| 05/28/1997 | CN2255129Y Energy-saving, long service life electronic starter |
| 05/28/1997 | CN1150884A Switching device |
| 05/28/1997 | CN1150883A Circuit arrangement |
| 05/28/1997 | CN1150882A Lighting system for controlling colour temp. of artificial light under influence of daylight level |
| 05/27/1997 | US5634153 Static immunity for single touch flash charger control |
| 05/27/1997 | US5633564 Modular uninterruptible lighting system |
| 05/27/1997 | CA2056010C Inverter device for stable, high power-factor input current supply |
| 05/22/1997 | DE19543419A1 Verfahren und Schaltungsanordnung zum Betreiben von Kaltkathoden-Glimmleuchtstofflampen Method and circuit arrangement for operating cold cathode Glimmleuchtstofflampen |
| 05/21/1997 | EP0774885A1 Circuit arrangement |
| 05/21/1997 | EP0774199A1 Ballast circuit |
| 05/21/1997 | EP0774198A1 Modular uninterruptible lighting system |
| 05/21/1997 | CN2254616Y Flip-chip radiating electronic ballast |
| 05/21/1997 | CN1150505A Servo-amplifier for controlling high-ohmic low-voltage source |
| 05/20/1997 | US5631523 Method of regulating lamp current through a fluorescent lamp by pulse energizing a driving supply |
| 05/15/1997 | WO1997017761A1 Circuit arrangement |
| 05/15/1997 | DE19645752A1 Discharge lamp e.g. headlamp for motor vehicle |
| 05/15/1997 | DE19542012A1 Mains-fed supply for fluorescent lamp |
| 05/14/1997 | EP0772956A1 Circuit arrangement |
| 05/14/1997 | EP0772903A1 Multi-resonant inverter |
| 05/14/1997 | CN2254261Y Glow starter for fluorescent lamp |
| 05/14/1997 | CN1149956A Discharge lamp ballast |
| 05/14/1997 | CN1149812A integrate step-up high power factor circuit for step-down bus voltage |
| 05/13/1997 | US5629588 Lighting circuit utilizing DC power for a discharge lamp utilizing AC power |
| 05/13/1997 | US5629586 Compact fluorescent lamp unit having first and second sealed end portions separated by a support member |
| 05/09/1997 | WO1997016945A1 A multi-function filament-heater power supply for an electronic ballast for long-life, dimmable lamps |
| 05/09/1997 | WO1997016944A1 Superimposed-pulsed ignition device |
| 05/07/1997 | EP0771518A1 Electrical power control system |
| 05/07/1997 | EP0771492A1 Servo-amplifier for controlling a high-ohmic low-voltage source |
| 05/07/1997 | EP0771440A1 Externally dimmable electronic ballast |
| 05/07/1997 | DE19608658C1 High-pressure gas discharge lamp ignition and operating circuit |
| 05/07/1997 | CN1149359A Switching power supply for the operation of electric lamps |
| 05/07/1997 | CN1149141A Synchronous flashing instrument with high frequency series of short pulses |
| 05/06/1997 | US5627708 High power factor electronic stabilizer with protection circuit |
| 05/06/1997 | US5627434 Apparatus for operating a fluorescent lamp of an image forming apparatus |
| 05/02/1997 | EP0770949A1 Photoresponsive device for controlling the lighting in a room |
| 05/01/1997 | WO1997016054A1 Inductively powered lighting |
| 05/01/1997 | CA2232981A1 Inductively powered lighting |
| 04/30/1997 | DE19639857A1 Load voltage supply low in higher harmonics for compact fluorescent lamp |
| 04/30/1997 | DE19541107A1 High frequency inverter for power saving lamp ballast |
| 04/30/1997 | DE19540326A1 Automobile headlight using gas-discharge lamp |
| 04/30/1997 | CN2253558Y Structure-improved fluorescent lamp starter |
| 04/30/1997 | CN2253557Y Starter base |
| 04/30/1997 | CN1148929A Circuit for energizing fluorescent lamp and method of operating circuit for energizing fluorescent lamp |
| 04/29/1997 | US5625538 High power factor power-supply system |
| 04/29/1997 | US5625258 Clocked power supply |
| 04/29/1997 | CA2048825C Stabilized fluorescent lamp for a document scanning system |
| 04/24/1997 | WO1997015172A1 Methods of controlling the brightness of a glow discharge |
| 04/24/1997 | CA2235215A1 Methods of controlling the brightness of a glow discharge |
| 04/23/1997 | EP0769889A1 Circuit arrangement |
| 04/23/1997 | EP0769855A1 Electrical keying circuit for dimmable fluorescent lamps |
| 04/23/1997 | EP0769803A2 Electrodeless fluorescent lamp |
| 04/23/1997 | EP0769240A1 Starter for gas discharge lamps, in particular motor-vehicule lights |
| 04/23/1997 | EP0769239A1 Circuit for energizing a fluorescent lamp and method of operating a circuit for energizing a fluorescent lamp |
| 04/23/1997 | CN2253098Y Daylight lamp general starting switch |
| 04/23/1997 | CN2253097Y Lamp ballast and transformer with short-circuit protection |
| 04/23/1997 | CN2253096Y Low voltage starting light regulating electornic ballast for daylight lamp |
| 04/23/1997 | CN2253095Y Capacitor daylight lamp electronic ballast |
| 04/23/1997 | CN2253094Y Cutoff-free energy saving lamp |
| 04/23/1997 | CN1148459A Discharge lamp operating device |
| 04/23/1997 | CN1148316A Electronics ballast for fluorescent lamp |
| 04/22/1997 | US5623188 Method and apparatus for controlling an oscillating circuit of a low pressure fluorescent lamp |
| 04/22/1997 | US5623187 Controller for a gas discharge lamp with variable inverter frequency and with lamp power and bus voltage control |
| 04/22/1997 | US5623184 Lamp circuit with filament current fault monitoring means |
| 04/22/1997 | CA2058207C Inverter with shared chopper function for high input power factor with restrained higher harmonies |
| 04/19/1997 | CA2188081A1 Electrodeless fluorescent lamp |
| 04/17/1997 | WO1997014276A1 Circuit arrangement |
| 04/17/1997 | WO1997014275A1 Circuit arrangement |
| 04/17/1997 | WO1997014274A1 Circuit arrangement |
| 04/17/1997 | WO1997014273A1 Circuit arrangement |
| 04/17/1997 | CA2207329A1 Circuit arrangement |
| 04/17/1997 | CA2207253A1 Circuit arrangement |
| 04/17/1997 | CA2207220A1 Circuit arrangement |
| 04/17/1997 | CA2207213A1 Circuit arrangement |
| 04/16/1997 | EP0768812A2 High power factor electronic ballast |
| 04/16/1997 | EP0768811A1 Electronic ballast for fluorescent lamp with oscillator clocking a dual MOSFET lamp circuit and a voltage regulated DC boost circuit |
| 04/16/1997 | EP0768016A1 A vertically lifted portable electric furnace |
| 04/16/1997 | EP0511304B1 Integrated radio-frequency light source for large scale display |
| 04/16/1997 | CN2252477Y Multifunction combined switch |
| 04/16/1997 | CN2252476Y DC commutating electronic transformer |
| 04/16/1997 | CN2252475Y Fluorescent lamp multi-lamp instantaneous start power source structure |
| 04/15/1997 | US5621598 Luminous tube protection circuit |
| 04/15/1997 | US5621303 Drive circuit for a lamp |
| 04/15/1997 | US5621281 Discharge lamp lighting device |
| 04/15/1997 | US5621280 Illumination unit, and electrodeless low-pressure discharge lamp and coil suitable for use therein |
| 04/15/1997 | US5621279 Power-factor-corrected electronic ballast circuit |
| 04/15/1997 | US5621266 Electrodeless fluorescent lamp |