Method of and apparatus for driving liquid-crystal display devic

Details Method of and apparatus for driving liquid-crystal display devic Method of and apparatus for driving liquid-crystal display devic

1992-04-02

1998-11-24

Chow, Dennis-Doon

Computer graphics processing and selective visual display system

Plural physical display element control system

Display elements arranged in matrix

345208, G09G 336

Patent

active

058414169

ABSTRACT:
A liquid-crystal display device of a simple matrix type is permitted to present a liquid-crystal display of good display quality free from nonuniformity in display brightness. A method of driving a liquid-crystal display device wherein voltages which correspond to potential differences between scanning voltages from a Y drive circuit and display voltages from an X drive circuit are applied to liquid-crystal cells at intersection points between scanning electrodes (Y electrodes) and data electrodes (X electrodes), thereby presenting a display conforming to display data comprises the steps of providing a correction time period for correcting the display voltage to be output from the X drive circuit at least once every scanning period of one line, and outputting a correction voltage at a voltage level which is intermediate between a voltage level in an ON-display state and a voltage level in an OFF-display state instead of the display voltage from the X drive circuit within the correction time period.

REFERENCES:
patent: 4679043 (1987-07-01), Morokawa
patent: 4745485 (1988-05-01), Iwasaki
patent: 4816816 (1989-03-01), Urui
patent: 5175535 (1992-12-01), Yamazaki
patent: 5179371 (1993-01-01), Yamagaki
patent: 5307084 (1994-04-01), Yamaguchi et al.

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