Lighting control system with variable arc control including...

Details Lighting control system with variable arc control including... Lighting control system with variable arc control including...

2005-08-09

2005-08-09

Vo, Tuyet Thi (Department: 2821)

Electric lamp and discharge devices: systems

Pulsating or a.c. supply

With power factor control device

C315S246000, C315S272000

Reexamination Certificate

active

06927544

ABSTRACT:
A lighting control system provides variable arc current to one or more fluorescent gas discharge lamps and provides a heating voltage to the lamp electrodes. The system includes a start-up circuit which includes circuitry for providing a starting voltage to an output power conditioning circuit. The latter drives a switching unit to control the application of DC power to the fluorescent gas discharge lamps and to provide an operating voltage to an input power factor correction circuit. The input power factor correction circuit boosts the converted DC power and the operating voltage. The start-up circuit includes a plurality of voltage doubling rectifier circuits and a plurality of zener diodes which receive the operating voltage and are electrically connected to the input power factor correction circuit and the output power conditioning unit so as to provide a regulated bias voltage supply to the output power conditioning unit and to the input power factor correction circuit.

REFERENCES:
patent: 5483127 (1996-01-01), Widmayer et al.
patent: 5568041 (1996-10-01), Hesterman
patent: 6011357 (2000-01-01), Gradzki et al.
patent: 6043611 (2000-03-01), Gradzki et al.
patent: 6049472 (2000-04-01), Suzuki et al.
patent: 6175195 (2001-01-01), Janczak et al.
patent: 2004/0124785 (2004-07-01), Alexandrov

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