EP 0748146 B1 20010829 - Circuit arrangement for preheating the electrodes of a discharge lamp
Title (en)
Circuit arrangement for preheating the electrodes of a discharge lamp
Title (de)
Schaltungsanordnung zur Wendelvorheizung von Leuchtstofflampen
Title (fr)
Circuit pour le chauffage des électrodes de lampes à décharge
Publication
Application
Priority
DE 19520999 A 19950608
Abstract (en)
[origin: EP0748146A1] The pre-heating circuit is used for the filaments (E1,E2) of at least one fluorescent lamp (FL) operated via an electronic bias circuit with a current regulator (3) inserted between a DC source (2) and earth. A switched voltage source (TR,DW1,DW2,HS) coupled to the output (HBO) of the current regulator is activated during the pre-heating phase, with a pair of outputs connected in parallel to the lamp filaments. Pref. the switched current source has a transformer (TR) coupled to the current regulator with a primary winding (P) connected in series with a controlled switch (4,HS) and a pair of secondary windings (S1,S2) coupled in parallel to respective lamp filaments.
IPC 1-7
IPC 8 full level
H05B 41/00 (2006.01); H05B 41/295 (2006.01)
CPC (source: EP KR US)
H05B 41/26 (2013.01 - KR); H05B 41/295 (2013.01 - EP US); Y10S 315/05 (2013.01 - EP US)
Designated contracting state (EPC)
AT BE CH DE FI FR GB IT LI NL SE
DOCDB simple family (publication)
EP 0748146 A1 19961211; EP 0748146 B1 20010829; AT E205042 T1 20010915; CA 2178443 A1 19961209; CA 2178443 C 20050405; DE 19520999 A1 19961212; DE 59607566 D1 20011004; HK 1005304 A1 19981231; KR 100448290 B1 20041126; KR 970004974 A 19970129; SG 64387 A1 19990427; TW 415158 B 20001211; US 5854538 A 19981229
DOCDB simple family (application)
EP 96108864 A 19960603; AT 96108864 T 19960603; CA 2178443 A 19960606; DE 19520999 A 19950608; DE 59607566 T 19960603; HK 98104397 A 19980521; KR 19960020230 A 19960607; SG 1996009967 A 19960605; TW 85106609 A 19960603; US 66244096 A 19960610