Computer graphics processing and selective visual display system – Display driving control circuitry – Intensity or color driving control
Reexamination Certificate
2005-05-04
2010-11-02
Nguyen, Chanh (Department: 2629)
Computer graphics processing and selective visual display system
Display driving control circuitry
Intensity or color driving control
C345S102000
Reexamination Certificate
active
07825942
ABSTRACT:
A method for processing a frame of image data, wherein the image data is amplified by a gain factor determined in dependence of a number of sub-pixels within said frame of image data having a luminance above a first threshold value. The resulting gain factor allows for optimal amplification of the image data without loss of local detail. This leads to a better perceived image quality. In a preferred embodiment, the gain factor is simultaneously used for reducing the backlight intensity in a backlit LCD device. Thereby, the perceived image quality is similar to that of the unprocessed image data, however the power consumption of the LCD backlight is reduced substantially.
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English translation of Japanese patent application JP 11-109317 by Kenji Watanabe.
Hwang et al, Late-News Paper: Image Synchronized Brightness Control:, 29.4L, 2001, SID 01 Digest, pp. 492-493.
Foli Adakou
Nguyen Chanh
NXP B.V.
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