Patent ID: 7969408

Claim:
An image display control device that adaptively reduces the display lighting luminance corresponding to the display image and correct the image signal to compensate for deterioration in image quality due to a reduction in luminance, the image display control device comprising: a statistical information acquisition section that acquires statistical information of the image signal in a frame unit; a calculator that generates a luminance of image display lighting after reduction in luminance and a correction coefficient used to correct the image signal to compensate for deterioration in image quality due to the reduction in the luminance of the lighting; and an image correction section that corrects the image signal using the correction coefficient, an effective pixel evaluation area set in part of one frame; the statistical information acquisition section acquiring the statistical information of the image signal corresponding to the effective pixel evaluation area, finishing acquiring the statistical information without waiting for completion of the one frame when the statistical information acquisition section has acquired the statistical information, and supplying the acquired statistical information to the calculator; the calculator calculating the correction coefficient based on the statistical information in a period until the one frame ends; the image correction section correcting the image signal of the video image in a frame subsequent to the preceding frame using the calculated correction coefficient; the statistical information acquisition section acquires the statistical values relating to the luminance and the chroma of the image signal of one frame; and the calculator determines whether to give priority to either a reduction in luminance or the chroma based on the relationship between the luminance and the chroma when generating a luminance of image display lighting after reduction in luminance, and in case priority is given to the chroma, the calculator limits the amount of reduction in luminance.