Patent ID: 8102473

Claim:
An image correction circuit comprising: a luminance detection means for detecting an average peak level of input image data in each image frame; an image correction means for correcting the input image data so as to lower the luminance of input image data in an intermediate luminance region according to the average peak level while reducing the luminance of input image data at a predetermined rate in at least of a low luminance region, wherein the image correction means corrects the input image data so as to continuously connect between a maximum luminance point of the input image data and an intermediate luminance region while maintaining the maximum luminance point, and the image correction means includes: a function determination means for determining an image correction function including an intermediate luminance function part, a low luminance function part and a high luminance function part, the intermediate luminance function part converting the direct current level of the input image data in the intermediate luminance region according to the detected average peak level, the low luminance function part continuously connecting between a minimum luminance point of input image data and the intermediate luminance function part, the high luminance function part continuously connecting between the maximum luminance point and the intermediate luminance function part with a fixed change rate; and a correction execution means for executing image correction on the input image data on the basis of the image correction function.