Drive apparatus for a liquid crystal display screen

Details Drive apparatus for a liquid crystal display screen Drive apparatus for a liquid crystal display screen

1994-07-13

1997-03-25

Bayerl, Raymond J.

Computer graphics processing and selective visual display system

Plural physical display element control system

Display elements arranged in matrix

345 98, 345 95, 345100, 345104, G01G 336, G09G 500, G09G 536

Patent

active

056149239

ABSTRACT:
An improved drive apparatus for a LC display screen is provided. The inventioned drive apparatus includes a programmable time setting means for changing drive currents in accordance with the size of the LC display screen. Depending upon the size of the LC display screen, it is necessary to change the drive current for charging up the display as promptly as possible at an initial stage of operation. The inventioned drive apparatus includes at least one time setting register means for programmably pre-setting a time according to the size of the display screen and a circuit selection means for providing a low resistor selection signal and a high resistor selection signal in accordance with the pre-set time of the time setting means.

REFERENCES:
patent: 5276458 (1994-01-01), Sawdon
patent: 5363118 (1994-12-01), Okumura

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