EP 0374617 A3 19920429 - DEVICE FOR STARTING AND OPERATING ELECTRIC GAS DISCHARGE LAMPS
Title (en)
DEVICE FOR STARTING AND OPERATING ELECTRIC GAS DISCHARGE LAMPS
Publication
Application
Priority
DE 3843029 A 19881221
Abstract (en)
[origin: EP0374617A2] In a device for starting and operating electric gas discharge lamps, in particular in motor vehicles, having an alternating voltage source to which a gas discharge lamp is connected, having a transformer, the secondary winding of which is arranged in series with the gas discharge lamp and forms an oscillatory circuit with a first capacitor, and the primary winding of which is part of a firing circuit which contains a second capacitor and a semiconductor switch, having a voltage detection device in the firing circuit which is connected via a switching device to the semiconductor switch, in order to minimise the reactive load for the alternating voltage source by means of the transformer and to ensure a reliable firing and operation of the device, the first secondary winding of the transformer, the first capacitor and the gas discharge lamp form a first series oscillatory circuit, the resonant frequency of the first series oscillatory circuit corresponding to the basic frequency of the voltage of the alternating voltage source. <IMAGE>
IPC 1-7
IPC 8 full level
H05B 41/04 (2006.01); H05B 41/288 (2006.01); H05B 41/38 (2006.01); H05B 41/392 (2006.01)
CPC (source: EP)
H05B 41/042 (2013.01); H05B 41/2881 (2013.01); H05B 41/382 (2013.01)
Citation (search report)
- [A] WO 8809108 A1 19881117 - BOSCH GMBH ROBERT [DE]
- [A] FR 2547128 A1 19841207 - NAT SEMICONDUCTOR CORP [US]
- [A] GB 2204751 A 19881116 - DAVIS GROUP LTD
- [AP] EP 0337021 A1 19891018 - ACTRONIC LIGHTING CO [ZA]
- [A] EP 0178852 A1 19860423 - THOMAS INDUSTRIES INC [US]
Designated contracting state (EPC)
DE ES FR GB IT NL
DOCDB simple family (publication)
EP 0374617 A2 19900627; EP 0374617 A3 19920429; EP 0374617 B1 19940406; DE 3843029 A1 19900628; DE 58907403 D1 19940511
DOCDB simple family (application)
EP 89122638 A 19891208; DE 3843029 A 19881221; DE 58907403 T 19891208