Fluorescent ballast with unique dimming control

Details Fluorescent ballast with unique dimming control Fluorescent ballast with unique dimming control

2005-03-29

2005-03-29

Tran, Thuy Vinh (Department: 2821)

Electric lamp and discharge devices: systems

Current and/or voltage regulation

Automatic regulation

C315S2090SC, C315S224000, C315S291000, C315SDIG004

Reexamination Certificate

active

06873121

ABSTRACT:
A ballast includes circuitry to allow the level of the lighting to be adjusted as well as circuitry that interfaces the ballast to a control system via the power line. The ballast is provided for adjusting the output by using a conventional triac phase chop dimming circuit. The basic concepts of the circuit can also be used to drive flat panel (electro luminescent) light source.

REFERENCES:
patent: 4277728 (1981-07-01), Stevens
patent: 5371439 (1994-12-01), Griffin
patent: 5574338 (1996-11-01), Kuusisto et al.
patent: 5600211 (1997-02-01), Luger
patent: 5677602 (1997-10-01), Paul et al.
patent: 6072283 (2000-06-01), Hedrei et al.
patent: 6259215 (2001-07-01), Roman
patent: 6329761 (2001-12-01), Melis et al.
patent: 6696803 (2004-02-01), Tao et al.

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