Circuit and method for driving flat display device

Details Circuit and method for driving flat display device Circuit and method for driving flat display device

2006-06-29

2010-02-16

Mengistu, Amare (Department: 2629)

Computer graphics processing and selective visual display system

Plural physical display element control system

Display elements arranged in matrix

C345S098000, C345S210000, C345S690000

Reexamination Certificate

active

07663588

ABSTRACT:
A circuit for driving a liquid crystal display device, as embodied, includes: a gray level voltage generator for generating a plurality of gray level voltages; and an intermediate gray level voltage generator for receiving a first gray level voltage and a second gray level voltage among the plurality of gray level voltages and for selectively outputting one of the first gray level voltage and a third gray level voltage through a plurality of capacitors, a value of the third gray level voltage being between the first and second gray level voltage and set by the plurality of capacitors, the intermediate gray level voltage generator including: an operational amplifier for pre-charging the plurality of capacitors using a current outputted from the operational amplifier and for selectively outputting one of the first gray level voltage and the third gray level voltage.

REFERENCES:
patent: 6323848 (2001-11-01), Abe
patent: 6570560 (2003-05-01), Hashimoto
patent: 2002/0033788 (2002-03-01), Kato
patent: 2003/0107432 (2003-06-01), Huynh
patent: 2005/0219097 (2005-10-01), Atriss et al.

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