EP 0693864 B1 20020612 - Circuit for operating one or more lour pressure discharge lamps
Title (en)
Circuit for operating one or more lour pressure discharge lamps
Title (de)
Schaltungsanordnung zum Betrieb einer oder mehrerer Niederdruckentladungslampen
Title (fr)
Circuit pour alimenter une ou plusieurs lampes à décharge basse-pression
Publication
Application
Priority
DE 4425859 A 19940721
Abstract (en)
[origin: EP0693864A2] Two lamps (LP1,LP2) are connected in series and supplied with current from a resonant circuit contg. an invertor (Q1,Q2). Their electrodes (E1-E4) are preheated from an auxiliary circuit including a semiconductor switch (Q3) with a resistive element (Z) in series. The voltage drop across the series combination of the resistance and semiconductor drain-to-source path in the low-impedance condition is sufficient to hold the switch in its conductive state. <IMAGE>
IPC 1-7
IPC 8 full level
H05B 41/282 (2006.01); H05B 41/295 (2006.01)
CPC (source: EP US)
H05B 41/295 (2013.01 - EP US)
Designated contracting state (EPC)
BE DE FR GB IT NL SE
DOCDB simple family (publication)
EP 0693864 A2 19960124; EP 0693864 A3 19971203; EP 0693864 B1 20020612; CA 2153108 A1 19960122; CA 2153108 C 20030617; DE 4425859 A1 19960125; DE 59510237 D1 20020718; JP H0855690 A 19960227; US 5589740 A 19961231
DOCDB simple family (application)
EP 95110851 A 19950711; CA 2153108 A 19950630; DE 4425859 A 19940721; DE 59510237 T 19950711; JP 20290795 A 19950717; US 49580395 A 19950627