Computer graphics processing and selective visual display system – Display driving control circuitry – Intensity or color driving control
Reexamination Certificate
2006-09-19
2006-09-19
Hjerpe, Richard (Department: 2629)
Computer graphics processing and selective visual display system
Display driving control circuitry
Intensity or color driving control
C345S089000, C345S090000
Reexamination Certificate
active
07110011
ABSTRACT:
In a monochromatic image display system, the number of tone levels which can be expressed is multiplied. As a display device, a liquid crystal panel40which can express each picture element41of a monochromatic image by three cells41a,41band41cis employed. A tone number conversion processing means20carries out a tone number conversion processing on an input original image signal Sorig according to the maximum number of tone levels which can be expressed by the liquid crystal panel40, thereby obtaining a monochromatic image signal So. Luminance of the monochromatic image signal So is allotted to the cells41a,41band41c. Time modulation is carried out on each cell by a time modulation means12which can express four tone levels (but tone level 0) so that each cell outputs allotted luminance. In this manner, the liquid crystal panel40can express thirteen tone levels (4×3+1=13) in total (tone level 0 inclusive).
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Ogawa Eiji
Yamaguchi Akira
Fuji Photo Film Co. , Ltd.
Hjerpe Richard
Lesperance Jean
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