Global Patent Index - EP 1261240 A1

EP 1261240 A1 2002-11-27 - Apparatus for discharge lamps with safe ignition

Title (en)

Apparatus for discharge lamps with safe ignition

Title (de)

Betriebsgerät für Entladungslampen mit sicherer Zündung

Title (fr)

Appareil pour des lampes à décharge avec un allumage sûr

Publication

EP 1261240 A1 (DE)

Application

EP 02005923 A

Priority

DE 10124636 A

Abstract (en)

[origin: CA2383331A1] Appliance for discharge lamps, which has a load circuit with a resonance point at a resonant frequency fres. In order to start the discharge lamps, the load circuit is fed with a square-wave source voltage Uq, whose period duration Tper multiplied by the resonant frequency fres of the load circuit produces approximately a natural number n which is greater than 1. The pulse duration Tpulse at the source voltage Uq is in a range which is described by the following condition: (see formula I)

Abstract (de)

Betriebsgerät für Entladungslampen, das einen Lastkreis besitzt, der eine Resonanz bei einer Resonanzfrequenz fres aufweist Zur Zündung der Entladungslampen wird der Lastkreis mit einer rechteckförmigen Quellspannung Uq gespeist, deren Periodendauer Tper multipliziert mit der Resonanzfrequenz fres des Lastkreises näherungsweise eine natürliche Zahl n ergibt, die größer als 1 ist. Die Pulsdauer Tpuls der Quellspannung Uq liegt in einem Bereich, der durch folgende Bedingung beschrieben wird: ((0,3) / (fres)) <= Tpuls <= ((1) / (fres)) <IMAGE>

IPC 1-7 (main, further and additional classification)

H05B 41/288

IPC 8 full level (invention and additional information)

H05B 41/288 (2006.01)

CPC (invention and additional information)

H05B 41/2883 (2013.01); Y10S 315/07 (2013.01)

Citation (search report)

Designated contracting state (EPC)

DE FR GB

EPO simple patent family

EP 1261240 A1 20021127; EP 1261240 B1 20040616; CA 2383331 A1 20021118; DE 10124636 A1 20021121; US 2002180376 A1 20021205; US 6611112 B2 20030826

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