Power circuit and liquid crystal display using same

Details Power circuit and liquid crystal display using same Power circuit and liquid crystal display using same

2008-09-29

2011-11-15

Berhane, Adolf (Department: 2838)

Electric power conversion systems

Current conversion

With condition responsive means to control the output...

C363S090000

Reexamination Certificate

active

08059433

ABSTRACT:
An exemplary power circuit includes a first rectifying and filtering circuit, a power factor correction (PFC) circuit, an inverter circuit and a second rectifying and filtering circuit. The first rectifying and filtering circuit receives an AC voltage and transforms the AC voltage to a first DC voltage. The power factor correction circuit includes a first transformer, a first diode and a first storage capacitor. The inverter circuit includes a transistor and a second transformer. A primary winding of the second transformer is grounded via the transistor and receives the first DC voltage via a primary winding of the first transformer, the first diode and a secondary winding of the first transformer in series when the transistor is switched on. The second rectifying and filtering circuit connected to a secondary winding of the second transformer for providing a second DC voltage to a load circuit.

REFERENCES:
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patent: 6600670 (2003-07-01), Morita et al.
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patent: 7729135 (2010-06-01), Schimel
patent: 7869227 (2011-01-01), Lee et al.
patent: 2006/0056210 (2006-03-01), Yamada et al.
patent: 2007/0025125 (2007-02-01), Nakahori et al.
patent: 2007/0171682 (2007-07-01), Yang et al.

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