Apparatus for supplying power and liquid crystal display...

Details Apparatus for supplying power and liquid crystal display... Apparatus for supplying power and liquid crystal display...

2008-01-15

2008-01-15

Laxton, Gary L (Department: 2838)

Electric power conversion systems

Current conversion

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

C363S034000, C363S097000

Reexamination Certificate

active

07319600

ABSTRACT:
Disclosed are a power supplying apparatus and a LCD having the same that reduces manufacturing cost of a large-scale LCD module and enhances powpower efficiency by integrating an external dc power supply used in a large-scale LCD panel into a LCD panel. A first voltage converter converts an external ac voltage into a first dc voltage, and changes a voltage level of the first de voltage into a second dc voltage having a highr voltage level than that of the first de voltage. A second voltage converter converts the second dc voltage into an ac voltage, raises a voltage level of the converted ac voltage, and provides the raised ac voltage to a load. A current detector detects a current flowing through the load, and provides a current detection signal as a feedback signal to the first voltage converter so that the first voltage provide a constant direct current output voltage.

REFERENCES:
patent: 5566060 (1996-10-01), Shimer et al.
patent: 5747942 (1998-05-01), Ranganath
patent: 6072283 (2000-06-01), Hedrei et al.
patent: 6329636 (2001-12-01), Geissler
patent: 6538909 (2003-03-01), Goodarzi et al.
patent: 1118950 (1996-03-01), None
patent: 55-15575 (1980-02-01), None
patent: 3-293320 (1991-12-01), None

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