Television – Image signal processing circuitry specific to television – Gray scale transformation
Reexamination Certificate
2006-09-05
2006-09-05
Yenke, Brian P. (Department: 2622)
Television
Image signal processing circuitry specific to television
Gray scale transformation
C348S254000, C348S687000, C345S060000, C345S089000, C345S590000, C345S690000
Reexamination Certificate
active
07102696
ABSTRACT:
A process of effecting various anti compensation processes on input image on a plasma display panel comprises the steps of a) performing a gamma (i.e., γ equal to 0.45) compensation process on a video signal received by the PDP with respect to a γ; b) dividing the video signal into at least two segments based on a gray level thereof; and c) performing a variety of anti compensation processes on the video signal in respective segment. A smaller γ is used in the anti compensation process with respect to the video signal in a range of low gray level for increasing the gray level in the range of low gray level. Similarly, a larger γ is used in the anti compensation process with respect to the video signal in a range of high gray level for increasing a gradient in the range of high gray level, thereby obtaining a sharp image contrast, improving image quality, and rendering an enhanced image brightness.
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Chen Kuang-Lang
Hsu Liang-Kuei
Kao Shiuh-Bin
Chunghwa Tubes, Ltd.
Jianq Chyun IP Office
Yenke Brian P.
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