Driving device for discharge lamps and voltage detection...

Details Driving device for discharge lamps and voltage detection... Driving device for discharge lamps and voltage detection...

2006-10-27

2009-12-01

Owens, Douglas W (Department: 2821)

Electric lamp and discharge devices: systems

Current and/or voltage regulation

C315S307000, C315S308000, C315S219000, C315S119000, C315S129000, C361S090000

Reexamination Certificate

active

07626343

ABSTRACT:
A voltage detection circuit includes a voltage obtaining circuit for transforming an AC signal into a voltage signal, an over-voltage detection circuit connected to the voltage obtaining circuit, and an under-voltage detection circuit connected to the voltage obtaining circuit. The over-voltage detection circuit is for determining whether the AC signal is over-voltage, and generating an over-voltage signal if the voltage signal is over-voltage. The over-voltage detection circuit includes a first transistor. The first transistor includes a first control electrode electrically connected to the voltage obtaining circuit, a first electrode, and a second electrode. The under-voltage detection circuit is for determining whether the AC signal is under-voltage, and generating an under-voltage signal if the voltage signal is under-voltage. The under-voltage detection circuit includes a second transistor. The second transistor includes a second control electrode electrically connected to the voltage obtaining circuit, a third electrode, and a fourth electrode.

REFERENCES:
patent: 6710555 (2004-03-01), Terada et al.
patent: 6900599 (2005-05-01), Ribarich
patent: 6900600 (2005-05-01), Rust et al.
patent: 6900993 (2005-05-01), Lin et al.
patent: 7187135 (2007-03-01), Yiu
patent: 7411360 (2008-08-01), Henry
patent: 2344942 (1999-10-01), None
patent: 1480734 (2004-03-01), None
patent: 1585586 (2005-02-01), None

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