Apparatus and method for driving a liquid crystal display

Details Apparatus and method for driving a liquid crystal display Apparatus and method for driving a liquid crystal display

2011-07-12

2011-07-12

Nguyen, Kevin M (Department: 2629)

Computer graphics processing and selective visual display system

Plural physical display element control system

Display elements arranged in matrix

C345S096000

Reexamination Certificate

active

07978163

ABSTRACT:
An system is disclosed for driving a liquid crystal display for automatically adjusting a level of a common voltage at the point that a positive polarity gray scale level voltage and a negative polarity gray scale level voltage are supplied to a liquid crystal display panel.A plurality of gate lines and a plurality of data lines are provided at a liquid crystal display panel. A gate driver supplies a gate pulse to the plurality of gate lines. A data driver supplies a positive polarity gray scale level voltage and a negative polarity gray scale level voltage to the plurality of data lines. A controller controls a common voltage level supplied to the liquid crystal display panel in accordance with a supply point of a gate pulse. A common voltage supplier alternatively supplies a first and second common voltage defined as a division reference of the positive polarity gray scale level voltage and the negative polarity gray scale level voltage based on a control of the controller to the liquid crystal display panel.

REFERENCES:
patent: 2002/0018035 (2002-02-01), Song et al.
patent: 2007/0001963 (2007-01-01), Koma
patent: 05-107557 (1993-04-01), None
patent: 05107557 (1993-04-01), None
patent: 07-120720 (1995-05-01), None
patent: 2001-242830 (2001-09-01), None
patent: WO 2005/033785 (2005-04-01), None
Office Action issued in corresponding Chinese Application No. 2006101705132 mailed on Feb. 15, 2008.
Office Action issued in corresponding Japanese Patent Application No. 2006-330756; issued Apr. 30, 2010.

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