Patent ID: 7535482

Claim:
A device for adaptively adjusting luminance of a source video, the device comprising: a plurality of luminance adjustment tables; a luminance analysis unit for analyzing a luminance distribution for a plurality of pixels of the source video, wherein the luminance analysis unit comprises: a luminance comparing unit for comparing the luminance levels of the pixels of the source video with a set of luminance thresholds, and for generating a luminance comparing signal; a plurality of counters electrically connected to the luminance comparing unit for counting a plurality of numbers of pixels within a plurality of luminance ranges defined by the set of luminance thresholds respectively, and for generating a plurality of indexes; and a luminance distribution differentiator electrically connected to the counters for determining the luminance distribution of the pixels of the source video according to the indexes; and a dynamic luminance curve fitting unit electrically connected to the luminance analysis unit and the luminance adjustment tables for adaptively adjusting luminance levels of the pixels of the source video based on one of the luminance adjustment tables selected according to the luminance distribution.