Power supply system for discharge lamps, and a vehicle headlamp

Details Power supply system for discharge lamps, and a vehicle headlamp Power supply system for discharge lamps, and a vehicle headlamp

1995-03-29

1996-10-22

Pascal, Robert

Electric lamp and discharge devices: systems

Periodic switch in the supply circuit

Periodic switch in the primary circuit of the supply...

315224, 315290, 315307, 315DIG7, 315205, H05B 3702

Patent

active

055680178

ABSTRACT:
The present invention is concerned with a power supply circuit for discharge lamps, especially those intended for vehicle headlamps. It also relates to a headlamp having a power supply circuit. The latter has a half wave bridge structure, the discharge lamp being connected to the midpoint of the bridge. A primary of a transformer works as a quasi-resonant wave generator under the switching effect of a quasi-resonant interrupter, which is controlled by a control circuit for controlling the electrical state of the discharge lamp. In addition, starting of the lamp is effected by a second transformer, the primary of which is connected to a spark gap having a suitably chosen triggering voltage.

REFERENCES:
patent: 3780342 (1973-12-01), Grimshaw et al.
patent: 4060709 (1977-11-01), Hanson
patent: 5051661 (1991-09-01), Lee
patent: 5065072 (1991-11-01), Albou et al.
patent: 5083065 (1992-01-01), Sakata et al.
patent: 5208515 (1993-05-01), Lee

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