WHITE POINT ADJUSTMENT METHOD, COLOR IMAGE PROCESSING METHOD, WHITE POINT ADJUSTMENT DEVICE AND LIQUID CRYSTAL DISPLAY DEVICE

摘要

PURPOSE: To provide a white point adjustment device that can set a color temperature of a white point at a highest gradation and adjust the white point so that the color temperature at each gradation is almost constant. CONSTITUTION: The white point adjustment device that adjusts an achromatic color level to an input video signal consisting of chrominance signals and allows a liquid crystal display module 30 to display an adjusted image, is provided with a 1st table 46 that is used to set a white point by deciding an offset from the highest gradation of at least one chrominance signal by each color temperature, a 2nd table 47 that is used to set the offset of the chrominance signal to converge the white point at a medium gradation by each color temperature set by the 1st table 46, and a white point adjustment section 40 that adds the offset set by the 1st table 46 and the 2nd table 47 to the input video signal.