| 摘要 |
A liquid crystal display 200 comprises a 1024-to-1021 gray scale conversion calculator 1 for converting an image data A(1024) of 1024 gray levels (=10 bits) into an image data Y(1021) of 1021 gray levels, an adjusting four-level sample storage 22 and a random number generator circuit 3 for randomly selecting and releasing on the frame-by-frame basis a group of the adjusting four gray levels Delta1p to Delta4p, Delta1q to Delta4q, and Delta1r to Delta4r which is determined by the least two bits Y(1021-d2) of the image data Y(1021) of 1021 gray levels at each of segments (p,q,r) of one pixel, an adder 23 for summing the upper eight bits Y(102113 d8) of the image data Y(1021) of 1021 gray levels and one group of the adjusting four gray levels to have three sets of image data of 256 gray levels D1p to D4p, D1q to D4q, and D1r to D4r which are then released in a sequence, and a 256 gray scale three-segment monochrome liquid crystal display panel 24. As the result, the apparatus needs no gray scale conversion table and can be minimized in the overall cost. Also, the image of which the number of gray levels is greater than that of a display panel can speciously be reproduced with explicitness.
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