Inverter device utilizing three switches controlled in a...

Details Inverter device utilizing three switches controlled in a... Inverter device utilizing three switches controlled in a...

2005-05-10

2008-09-09

Vu, Bao Q (Department: 2838)

Electric power conversion systems

Current conversion

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

C363S024000, C363S098000, C363S134000

Reexamination Certificate

active

07423891

ABSTRACT:
Described is an inverter device suitable for driving a cold cathode fluorescent lamp (CCFL), comprising a transformer having a primary winding and a secondary winding. The primary winding has two terminals connected to a return-path terminal of a direct current (DC) power source through a second switch and a third switch, respectively, and a center tap connected to an output of the DC power source through a first switch. A signal controlling unit is further included to control the switches in such a manner that the second and third switches are on concurrently or alternatively in cooperation with the first switch. As such, an alternating current (AC) power is fed to the primary winding of the transformer and an output of the transformer is supplied to the CCFL.

REFERENCES:
patent: 5825133 (1998-10-01), Conway
patent: 5896280 (1999-04-01), Gucyski et al.
patent: 6876157 (2005-04-01), Henry
patent: 7046526 (2006-05-01), Toda et al.
patent: 7064497 (2006-06-01), Hsieh

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