EP 0707438 B1 19990929 - Ballast for at least one discharge lamp
Title (en)
Ballast for at least one discharge lamp
Title (de)
Vorschaltgerät für mindestens eine Gasentladungslampe
Title (fr)
Ballast pour au moins une lampe à décharge
Publication
Application
Priority
- DE 4436705 A 19941013
- DE 19501695 A 19950120
Abstract (en)
[origin: EP0707438A2] The circuit has inverter switches (S1,S2) coupled in series, and operated in an alternating mode using signals from a control circuit (1). The switches connect with the load circuit that has series resonance stage having a coil (L1) and capacitor (C3). The circuit connects to the lighting tube via a coupling capacitor (C1). The other electrode of the lamp is connected to a heating transformer (T) that has a pair of primaries (T1,T3) and a pair of secondaries (T2,T4). A switch (S3) in the supply line controls the generation of the heating current.
IPC 1-7
IPC 8 full level
H05B 41/295 (2006.01); H05B 41/298 (2006.01)
CPC (source: EP US)
H05B 41/295 (2013.01 - EP US); H05B 41/2985 (2013.01 - EP US); H05B 41/3925 (2013.01 - EP US)
Designated contracting state (EPC)
AT CH DE ES FR GB IT LI NL SE
DOCDB simple family (publication)
EP 0707438 A2 19960417; EP 0707438 A3 19970730; EP 0707438 B1 19990929; AT E185231 T1 19991015; ES 2138129 T3 20000101; FI 113148 B 20040227; FI 954815 A0 19951010; FI 954815 A 19960414; US 5656891 A 19970812
DOCDB simple family (application)
EP 95116198 A 19951013; AT 95116198 T 19951013; ES 95116198 T 19951013; FI 954815 A 19951010; US 53071095 A 19950919