Method and apparatus for driving a passive matrix liquid crystal

Details Method and apparatus for driving a passive matrix liquid crystal Method and apparatus for driving a passive matrix liquid crystal

1997-09-23

2000-04-25

Mengistu, Amare

Computer graphics processing and selective visual display system

Plural physical display element control system

Display elements arranged in matrix

345147, G09G 336

Patent

active

060549726

ABSTRACT:
A passive matrix liquid crystal display device which can display high-quality gradation by reducing cross-talk and improving contrast is attained. A driving apparatus comprises a field memory of picture image data for storing picture images being input from outside; a readout circuit of picture image data for reading out each element in a specific column of a matrix of picture image data; a calculation circuit of gradation correction term for calculating a gradation correction term from the readout picture image data; a memory of scan data for storing scan data in advance; a readout circuit of scan data for reading out specific scan data from the memory of scan data; an operation circuit of each element for operating a matrix of signal data based on picture image data of a specific column being read out from the field memory of picture image data and scan data being read out from the memory of scan data; and a field memory of signal data for storing data after being operated.

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