Circuit apparatus and method for operating a lamp

Details Circuit apparatus and method for operating a lamp Circuit apparatus and method for operating a lamp

2006-05-30

2006-05-30

Dinh, Trinh V (Department: 2821)

Electric lamp and discharge devices: systems

Periodic switch in the supply circuit

Silicon controlled rectifier ignition

C315SDIG002

Reexamination Certificate

active

07053561

ABSTRACT:
The current through the components of a half-bridge of an electronic ballast is intended to be limited during the starting phase. For this purpose, the gate of a half-bridge transistor (T2) is driven by a current limiting circuit (D1, D2, D3, T3, C3) in such a way that the current through the transistors (T1, T2) is limited during the starting phase, whereas it remains unlimited during the glow phase and burning phase of the lamp (LA).

REFERENCES:
patent: 5589740 (1996-12-01), Rudolph et al.
patent: 5825136 (1998-10-01), Rudolph
patent: 5831396 (1998-11-01), Rudolph
patent: 6057611 (2000-05-01), Reiser
patent: 6194845 (2001-02-01), Konopka et al.
patent: 6246173 (2001-06-01), Fischer et al.
patent: 6259213 (2001-07-01), Rudolph
patent: 6424101 (2002-07-01), Sabate

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