Source driving device of a liquid crystal display

Details Source driving device of a liquid crystal display Source driving device of a liquid crystal display

1994-05-06

1996-06-04

Hjerpe, Richard

Computer graphics processing and selective visual display system

Plural physical display element control system

Display elements arranged in matrix

345100, G09G 336

Patent

active

055237720

ABSTRACT:
A source driving device for a liquid crystal display which includes a mode conversion switch for selecting between a digital-to-analog of operation for applications requiring eight grey levels, and an analog-to-analog mode of operation for applications requiring more than eight grey levels. The source driver includes a shift register for sequentially enabling portions of stored image data to be processed in the digital-to-analog mode. The source driver also includes a sample and hold circuit for providing a regulated output of an analog image signal in the analog-to-analog.

REFERENCES:
patent: 5168270 (1992-12-01), Masumori
patent: 5192945 (1993-03-01), Kusada
patent: 5283565 (1994-02-01), Suzuki
patent: 5313222 (1994-05-01), Lee
patent: 5335023 (1994-08-01), Edwards
patent: 5337070 (1994-08-01), Kitajima
patent: 5357290 (1994-10-01), Horibe

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