Computer graphics processing and selective visual display system – Display driving control circuitry – Display power source
Reexamination Certificate
2007-08-13
2010-12-07
Nguyen, Jimmy H (Department: 2629)
Computer graphics processing and selective visual display system
Display driving control circuitry
Display power source
C345S100000
Reexamination Certificate
active
07847797
ABSTRACT:
The present invention provides a drive circuit suitable for use in a liquid crystal display, comprising an op amp which has an inversion input, a non-inversion input and a first output and of which the inversion input and the first output are connected to each other; a first PMOS transistor having a gate to which a node for the non-inversion input of the op amp is connected, and a source to which a node for the output of the op amp is connected; a first NMOS transistor having a gate to which a drain of the first PMOS transistor is connected, a drain to which the node for the output of the op amp is connected, and a source connected to ground; and a second NMOS transistor having a gate supplied with a predetermined first voltage, a drain to which the drain of the first PMOS transistor is connected, and a source connected to ground.
REFERENCES:
patent: 6483384 (2002-11-01), Chimura
patent: 7075342 (2006-07-01), Nishimura
patent: 7352314 (2008-04-01), Horibata
patent: 05-041651 (1993-02-01), None
patent: 2003-122325 (2003-04-01), None
Nguyen Jimmy H
Oki Semiconductor Co., Ltd.
Volentine & Whitt PLLC
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