EP 0693864 A3 19971203 - 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)
Citation (search report)
- [Y] DE 4100349 A1 19910801 - SIEMENS AG [DE]
- [Y] DE 2924069 A1 19801218 - PHILIPS PATENTVERWALTUNG
- [A] DE 4328306 A1 19940317 - SPINDLER BERNHARD DIPL ING [DE]
- [A] EP 0589081 A1 19940330 - KNOBEL LICHTTECH [CH]
- [A] DE 3022773 A1 19810115 - SILIANI PIER
- [A] EP 0378992 A1 19900725 - PATENT TREUHAND GES FUER ELEKTRISCHE GLUEHLAMPEN MBH [DE]
- [A] DE 3401653 A1 19840726 - ZUMTOBEL AG [AT]
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