Computer graphics processing and selective visual display system – Display driving control circuitry – Intensity or color driving control
Reexamination Certificate
2007-12-18
2007-12-18
Hjerpe, Richard (Department: 2628)
Computer graphics processing and selective visual display system
Display driving control circuitry
Intensity or color driving control
C345S063000, C345S694000
Reexamination Certificate
active
10542025
ABSTRACT:
A first adding circuit sums an input image signal of a target pixel and a value that is derived by multiplying respective display errors of three pixels, which are before the target pixel by one line, by weighting factors. A gradation candidate converter converts the gradation of the summed image signal to a plurality of available gradation candidates that are convertible when an error of the immediate left pixel is added. A delaying circuit delays the summed image signal. A second adding circuit sums the delayed image signal and a value that is derived by multiplying the error generated in the immediate left pixel by a weighting factor. A gradation selector selects a gradation closest to the gradation of the image signal to which the error is added from a plurality of gradation candidates, and outputs it as an image signal of the target pixel. A differencing circuit determines a display error of the target pixel.
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Hjerpe Richard
Matsushita Electric - Industrial Co., Ltd.
Murdoch Crystal
Wenderoth , Lind & Ponack, L.L.P.
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