| Patents for H05B 41 - Circuit arrangements or apparatus for igniting or operating discharge lamps (35,100) |
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| 10/07/1997 | US5675220 Power supply for vehicular neon light |
| 10/02/1997 | DE19640028A1 Controlled-frequency device for operation of e.g. fluorescent lamp |
| 10/02/1997 | DE19613096A1 Fluorescent lamp with capacitive current-limiting circuit |
| 10/01/1997 | EP0798952A1 Circuit arrangement for operating electric lamps and method of operation |
| 10/01/1997 | EP0798951A2 Converter housing |
| 10/01/1997 | EP0797907A1 Circuit arrangement |
| 10/01/1997 | EP0797906A1 Circuit arrangement |
| 10/01/1997 | EP0797905A1 Circuit arrangement |
| 10/01/1997 | EP0535141B1 Fast warm-up ballast for arc discharge lamp |
| 10/01/1997 | EP0535080B1 Arc discharge ballast suitable for automotive applications |
| 10/01/1997 | CN1161126A System for operating a lamp |
| 10/01/1997 | CN1161125A 镇流器电路 Ballast circuit |
| 10/01/1997 | CN1160981A Drive circuit device for lamp |
| 10/01/1997 | CN1160980A Light source lighting device |
| 10/01/1997 | CN1160979A Output light stabilizer for fluorescent lamp |
| 10/01/1997 | CN1160961A Color image reader |
| 10/01/1997 | CN1160947A Phase-reversal circuit |
| 09/25/1997 | WO1997035336A1 Gas discharge lamp, in particular for a motor-vehicle headlight |
| 09/25/1997 | WO1997034464A1 High-efficiency self-regulated electronic ballast with a single characteristic curve for operating high-pressure sodium vapour lamps |
| 09/24/1997 | EP0797377A1 Improved half bridge drive for discharge lamps |
| 09/24/1997 | CN1160332A Feedback control system of electronic ballast which detects switching of lamp |
| 09/23/1997 | US5671128 Power supply apparatus |
| 09/23/1997 | US5670849 For operating a lamp |
| 09/23/1997 | CA2172481A1 Transformerless ballast with separate ignition circuit |
| 09/22/1997 | CA2200500A1 Improved half-bridge control of fluorescent lamps |
| 09/18/1997 | DE19610388A1 Ignition device e.g. for discharge lamp of motor vehicle |
| 09/18/1997 | DE19610385A1 Gasentladungslampe, insbesondere für Kraftfahrzeug-Scheinwerfer Gas discharge lamp, in particular for motor vehicle headlights |
| 09/17/1997 | EP0796036A2 Discharge lamp igniting apparatus |
| 09/17/1997 | EP0619033B1 Controller for photographic lighting |
| 09/17/1997 | CN1159681A Pulse voltage series circuit for producing electric medium block discharge |
| 09/16/1997 | US5668712 Circuit for controlling a DCC converter in a power supply circuit for a discharge lamp of a motor vehicle headlight |
| 09/16/1997 | US5668446 Energy management control system for fluorescent lighting |
| 09/16/1997 | US5668445 Electronic flash apparatus with constant duration repeated flash |
| 09/16/1997 | US5668444 Soft-transition FSK dimmer for gaseous luminous tube lights |
| 09/16/1997 | US5668433 Electrodeless fluorescent lamp having an insulative housing arrangement |
| 09/12/1997 | WO1997033457A1 Dimming uniformity enhancement plates |
| 09/12/1997 | WO1997033456A1 Circuit arrangement for igniting of high-pressure gas discharge lamps |
| 09/12/1997 | WO1997033455A1 Arrangement for detecting the ignition of a high-pressure gas discharge lamp |
| 09/12/1997 | WO1997033454A1 An electronic ballast for a compact fluorescent lamp |
| 09/12/1997 | WO1997033453A1 Output control system for an a.c. high-pressure gas-discharge lamp intended in particular for motor vehicles |
| 09/11/1997 | DE19608938A1 Electrical switching arrangement for operating lamps |
| 09/11/1997 | DE19608655A1 Leistungssteuerung einer mit Wechselstrom betriebenen Hochdruckgasentladungslampe, insbesondere für Kraftfahrzeuge Power control of a powered with alternating current high pressure gas discharge lamp, in particular for motor vehicles |
| 09/10/1997 | EP0794695A1 Circuit for operating a high pressure discharge lamp |
| 09/10/1997 | EP0794694A1 Circuit for operating a high pressure discharge lamp |
| 09/10/1997 | EP0794693A1 A magnetron power supply for a quick restart of an electrodeless lamp |
| 09/10/1997 | EP0794691A2 Device for accurately detecting end of usage lifetime of a discharge lamp |
| 09/10/1997 | EP0794606A1 Electrical circuit arrangement for operating lamps |
| 09/10/1997 | EP0794555A2 Circular fluorescent lamp unit and lighting apparatus |
| 09/10/1997 | CN2262327Y Daylight lamp starter using alloy block |
| 09/10/1997 | CN2262164Y Long life daylight lamp started by field excitation |
| 09/10/1997 | CN1159279A 镇流电路 Ballast circuit |
| 09/10/1997 | CN1159132A Multifunctional electronic inductance and hot-cathode ballast |
| 09/09/1997 | US5666571 Automatic emission device suitable for use as light source, such as flash unit |
| 09/09/1997 | US5666279 Voltage resonance inverter circuit for dimable cold cathode tubes |
| 09/09/1997 | US5666031 Neon gas discharge lamp and method of pulsed operation |
| 09/09/1997 | CA2052296C High frequency luminous tube power supply with ground fault protection |
| 09/09/1997 | CA2036518C Full spectrum polarized lighting system |
| 09/04/1997 | WO1997032453A1 Fluorescent lamp with replaceable light element |
| 09/04/1997 | DE19632869C1 Display read-out brightness adjustment method e.g. for motor vehicle dashboard display with dimmer potentiometer |
| 09/03/1997 | EP0793158A1 Method and device for controlling a blind |
| 09/03/1997 | EP0792570A1 Circuit for starting and operating a high-pressure gas discharge lamp operated by a controlled a.c. current |
| 09/03/1997 | CN2261710Y Running circuits for neon and fluorescent lights |
| 09/02/1997 | US5663875 Voltage converter for the discharge lamp of a motor vehicle headlight, a power supply circuit, and a headlight including the circuit |
| 09/02/1997 | US5663613 Lighting circuit for discharge lamp |
| 09/02/1997 | US5663612 Apparatus for dimming discharge lamp having electromagnetic regulator with selectively tapped capacitance winding |
| 08/28/1997 | DE19607208A1 Leuchtstofflampe mit auswechselbarem Leuchtteil Fluorescent lamp with replaceable light emitting part |
| 08/27/1997 | EP0791282A1 Device for operating a gas discharge lamp |
| 08/27/1997 | EP0791281A1 System for operating a lamp |
| 08/27/1997 | CN2261134Y Starting switch for fluorescent lamp |
| 08/27/1997 | CN1158211A Circuit arrangement |
| 08/27/1997 | CN1158210A Circuit apparatus |
| 08/26/1997 | US5661372 Stroboscopic instrument having a gate-controlled-switching element and a step-up power means therefor |
| 08/21/1997 | WO1997030569A1 In-rush surge limiting electronic ballast |
| 08/20/1997 | CN2260432Y Starter for fluorescent lamp |
| 08/20/1997 | CN1157546A Electronic ballast circuit |
| 08/20/1997 | CN1157545A Circuit arrangement |
| 08/19/1997 | US5659491 Method and system for inspecting an assembly, and electrical inspection apparatus for a flash unit |
| 08/19/1997 | US5659227 Fluorescent lamp controller and original-document exposing apparatus a having the fluorescent lamp contoller |
| 08/14/1997 | WO1997029618A1 Dimmer for fluorescent lighting |
| 08/14/1997 | WO1997019574A3 Process and circuit arrangement for operating cold cathode discharge lamps |
| 08/13/1997 | EP0788677A1 Transformerless high-voltage generator circuit |
| 08/13/1997 | CN1157090A Circuit arrangement |
| 08/13/1997 | CN1156842A High-speed charge flash for camera |
| 08/13/1997 | CN1156802A Fluorescent lamp device and lighting appliance |
| 08/12/1997 | US5656892 For displaying an image in response to an image signal |
| 08/12/1997 | US5656891 Gas discharge lamp ballast with heating control circuit and method of operating same |
| 08/12/1997 | US5656189 Heater controller for atomic frequency standards |
| 08/07/1997 | CA2168941A1 Dimmer for fluorescent lighting |
| 08/06/1997 | EP0788298A1 Reduced bus-voltage integrated-boost high power-factor circuit for powering gas discharge lamps |
| 08/06/1997 | EP0788141A2 Electrodeless high intensity discharge lamp having a phosphorus fill |
| 08/06/1997 | EP0788140A2 Electrodeless high intensity discharge lamp having a boron sulfide fill |
| 08/06/1997 | EP0787420A1 Lamp socket, lamp and method of controlling lighting |
| 08/06/1997 | CN1156532A RF driven sulfur lamp |
| 08/06/1997 | CN1156391A Circuit device |
| 08/06/1997 | CN1156390A Circuit plan |
| 08/05/1997 | US5654611 Lamp control circuit having a V-I converter with slopes of different magnitudes and a second resistor connected in series with a first such that the second senses the output current of the V-I converter |
| 08/05/1997 | US5654610 Electrodeless discharge lamp having a neon fill |
| 08/05/1997 | US5654609 Gas discharge lamp and power distribution system therefor |
| 08/05/1997 | US5654605 Hardware arrangement and method of driving a piezoelectric transformer |
| 08/01/1997 | CA2196361A1 Electrodeless high intensity discharge lamp having a boron sulfide fill |