Level regulation circuit of common signal of LCD

Details Level regulation circuit of common signal of LCD Level regulation circuit of common signal of LCD

2009-08-05

2010-11-02

Osorio, Ricardo L (Department: 2629)

Computer graphics processing and selective visual display system

Display driving control circuitry

Display power source

C345S087000

Reexamination Certificate

active

07825920

ABSTRACT:
A level regulation circuit of a common signal of an LCD generates a first level voltage and a second level voltage according to a common voltage so as to generate a first common signal and a second common signal. Each pixel of the LCD includes two storage capacitors receiving the first common signal and the second common signal respectively. The level regulation circuit of the common signal uses an operational amplifier and one or two Zener diodes to generate the first level voltage and the second level voltage. The first level voltage and the second level voltage have the same voltage difference to the common voltage, so the flicker of the LCD can be reduced.

REFERENCES:
patent: 5566064 (1996-10-01), Schoenwald et al.
patent: 5874828 (1999-02-01), Lee
patent: 2003/0197425 (2003-10-01), Montante
patent: 2008/0106538 (2008-05-01), Ko et al.
patent: 2008/0218149 (2008-09-01), Aoki et al.

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