Multiple-lamp backlight inverter

Details Multiple-lamp backlight inverter Multiple-lamp backlight inverter

2005-07-26

2005-07-26

Dinh, Trinh Vo (Department: 2821)

Electric lamp and discharge devices: systems

Current and/or voltage regulation

C315S307000, C315S294000, C315S276000

Reexamination Certificate

active

06922023

ABSTRACT:
An inverter for driving multiple discharge lamps. The inverter has a transformer for driving a first discharge lamp and a second discharge lamp. The inverter also includes a first balancing circuit connected in series with the first discharge lamp and a second balancing circuit connected in series with the second discharge lamp. According to a matching signal, the first and the second balancing circuits adjust a first lamp current through the first discharge lamp and a second lamp current through the second discharge lamp, respectively. A comparator is provided to receive a first sensing signal from the first balancing circuit and a second sensing signal from the second balancing circuit. Comparing the first sensing signal with the second sensing signal, the comparator generates the matching signal which controls the first and the second balancing circuits to equalize the first lamp current and the second lamp current.

REFERENCES:
patent: 5546300 (1996-08-01), Lee et al.
patent: 5910709 (1999-06-01), Stevanovic et al.
patent: 6320329 (2001-11-01), Wacyk
patent: 6420839 (2002-07-01), Chiang et al.
patent: 6753660 (2004-06-01), Hartikka et al.

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