| 摘要 |
PROBLEM TO BE SOLVED: To provide an image signal processing circuit that can control the amount of adjustment in luminance and color according to chroma, and can reproduce a color image without deteriorating brightness in color and resolution. SOLUTION: An input luminance signal Yin is subjected to gradation correction by a luminance gradation correction circuit 1 for inputting to a luminance compensation value adjustment circuit 2, and the weighted addition averaging of the input luminance signal and a gradation correction signal is carried out with a normalized chroma Ky obtained by normalizing by the maximum value in a normalization circuit 6 as a weighting coefficient for generating a correction luminance signal. Also, by LUTs 3 and 4 for inputting the luminance signal before and after the gradation correction and a multiplier 9, a color correction coefficient Kc is obtained according to the ratio of the maximum values that can be set by the chroma in the luminance signal before and after the gradation correction, the color correction coefficient is adjusted in a color correction coefficient adjustment circuit 7 with the normalized chroma Ky as the weighting coefficient, and a color signal is corrected by the adjusted color correction coefficient.
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