Liquid crystal display device

Details Liquid crystal display device Liquid crystal display device

2007-08-07

2007-08-07

Awad, Amr A. (Department: 2629)

Computer graphics processing and selective visual display system

Plural physical display element control system

Display elements arranged in matrix

C341S144000

Reexamination Certificate

active

10669913

ABSTRACT:
Disclosed is a liquid crystal display device which is capable of adjusting a contrast ratio by transforming and outputting input data of a reference voltage circuit. Analog voltage signal generator stores an input synchronous signal and a plurality of input digital data signal in response to a write enable signal, and converts the stored digital data signal into a plurality of analog voltage signal pairs in response to an output enable signal. A plurality of reference voltage generators divide a boosted source voltage according to the analog voltage signal pairs from the analog voltage signal generator to generate a plurality of reference voltages. A source driver integrated circuit receives the plurality of reference voltages from the plurality of reference voltage generators.

REFERENCES:
patent: 5796384 (1998-08-01), Kim
patent: 6222515 (2001-04-01), Yamaguchi et al.
patent: 6380917 (2002-04-01), Matsueda et al.
patent: 6680733 (2004-01-01), Woo et al.
patent: 6750839 (2004-06-01), Hogan
patent: 6844839 (2005-01-01), Lee et al.

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