Circuit and method of igniting a high-pressure lamp

Details Circuit and method of igniting a high-pressure lamp Circuit and method of igniting a high-pressure lamp

2006-09-19

2006-09-19

Vo, Tuyet Thi (Department: 2821)

Electric power conversion systems

Current conversion

Including d.c.-a.c.-d.c. converter

C363S021030, C363S021010, C315S2090SC, C315S224000

Reexamination Certificate

active

07110267

ABSTRACT:
The invention relates to an electronic circuit for igniting a high-pressure lamp. A resonant circuit13of the circuit is used to supply the ignition voltage for the high-pressure lamp. To enable an exact adjustment of the resonance frequency in the resonant circuit, it is proposed that the circuit also comprises converter12for generating an alternating voltage with which the resonant circuit13is excited and an oscillator14, 16, 17for driving the converter12, the fundamental frequency of the output voltage of the oscillator being at least in proximity to an integral fraction of the resonance frequency of the resonant circuit13. Finally, it is proposed that the circuit includes a feedback17from the resonant circuit13to the oscillator14, 16, 17, whereby the fundamental frequency of the output voltage of the oscillator is so tuned that the resulting frequency of the output voltage of the oscillator corresponds substantially exactly to the integral fraction of the resonance frequency. The invention also relates to a corresponding lighting installation and a corresponding method.

REFERENCES:
patent: 4788634 (1988-11-01), Schlecht et al.
patent: 5233273 (1993-08-01), Waki et al.
patent: 5838117 (1998-11-01), Nerone
patent: 6072710 (2000-06-01), Chang
patent: 6160362 (2000-12-01), Shone et al.

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