Patent ID: 7990402
Filing Date: 2011-08-02
Classification: G09G

Abstract:
1. An image display control device that adaptively reduces a luminance of image display lighting corresponding to a display image and corrects an image signal to compensate for deterioration in image quality due to the reduction in the luminance of the lighting, the image display control device comprising: a statistical information acquisition section that acquires statistical information of the image signal; a common calculator that calculates the luminance of the lighting after reduction in luminance using the statistical information of the image signal supplied from the statistical information acquisition section, and generates a correction coefficient to correct the image signal; a code storage section that stores a plurality of codes, the plurality of codes specifying an operation procedure of the common calculator; a sequence instruction section that controls an order of output of the plurality of codes from the code storage section; and a decoder that decodes the plurality of codes output from the code storage section and generates at least one of an instruction and data supplied to the common calculator, the statistical information acquisition section acquiring a statistical value of a luminance of the image signal and a statistical value of a chroma of the image signal, and when calculating the luminance of the lighting after reduction in luminance, the image display control device determining whether to give priority to either a reduction in the luminance of the lighting or prevention of a decrease in the chroma based on a relationship between the statistical value of the luminance and the statistical value of the chroma, and performing luminance reduction control while limiting a reduction in the luminance of the lighting when the image display control device has determined to give priority to prevention of a decrease in the chroma.