Method and apparatus for driving a liquid crystal panel

Details Method and apparatus for driving a liquid crystal panel Method and apparatus for driving a liquid crystal panel

1995-09-06

1997-10-07

Powell, Mark R.

Computer graphics processing and selective visual display system

Plural physical display element control system

Display elements arranged in matrix

345 94, 345209, G09G 336

Patent

active

056753535

ABSTRACT:
An LCD driving circuit which reduces the effective voltage difference of the applied voltage waveform between different pixels and suppresses crosstalk. The LCD panel has a single matrix LCD panel 10; scan electrode drive circuit 12, and signal electrode drive circuit 14 for driving scan electrodes X and signal electrodes Y, respectively, of the LCD panel 10; controller 16 for controlling the two drive circuits 12 and 14; level shifter 17 for shifting the level of the signal from controller 16 with respect to scan electrode drive circuit 12; and host computer 18 for feeding image data VD and timing signal TS to controller 16. Controller 16 is made of scan selection control unit 20 and display control unit 22. Selection order decision circuit 26 of scan selection control unit 20 determines the order of scan electrodes X on which the selection scan voltage is to be applied in an interval shorter or longer than an alternation period by means of line alternation operation.

REFERENCES:
patent: 4926168 (1990-05-01), Yamamoto et al.

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