Global Patent Index - EP 0330118 A3

EP 0330118 A3 19910227 - DRIVE CIRCUITRY FOR A LOW-PRESSURE DISCHARGE LAMP

Title (en)

DRIVE CIRCUITRY FOR A LOW-PRESSURE DISCHARGE LAMP

Publication

EP 0330118 A3 19910227 (DE)

Application

EP 89102899 A 19890220

Priority

DE 3805510 A 19880222

Abstract (en)

[origin: EP0330118A2] In the circuit arrangement for high-frequency operation of a low-]pressure discharge lamp (LP), having a mains rectifier (2) and a push-pull frequency generator (3) with a series-resonant circuit and a switch-off device, the electrode (E2) connected to the positive or negative terminal of the mains rectifier (2) is connected between the mains rectifier (2) and the push-pull frequency generator (3). As a result of this connection of the electrode (E2), when the low-pressure discharge lamp (LP) is replaced, the circuit is interrupted and the switch-off circuit is inhibited. On insertion of a new lamp, the circuit is closed again so that the low-pressure discharge lamp (LP) can be started automatically again by means of the push-pull frequency generator (3). <IMAGE>

IPC 1-7

H05B 41/29

IPC 8 full level

H05B 41/298 (2006.01)

CPC (source: EP US)

H05B 41/2985 (2013.01 - EP US); Y10S 315/05 (2013.01 - EP US)

Citation (search report)

Designated contracting state (EPC)

CH DE FR GB IT LI

DOCDB simple family (publication)

EP 0330118 A2 19890830; EP 0330118 A3 19910227; DE 3805510 A1 19890831; FI 885273 A0 19881115; FI 885273 A 19890823; US 4949013 A 19900814

DOCDB simple family (application)

EP 89102899 A 19890220; DE 3805510 A 19880222; FI 885273 A 19881115; US 31152589 A 19890216