Patent ID: 8848003

Claim:
A method of chromaticity adjustment of a display device including a plurality of pixels and a drive circuit for generating a gray-scale signal corresponding to a video signal input from an external portion and supplying the gray-scale signal to the plurality of pixels, the method comprising: a first step of measuring chromaticity coordinates of an image displayed on the display device; a second step of determining whether the measured chromaticity coordinates are chromaticity coordinates within a first region of a CIE xy chromaticity diagram that does not need a chromaticity correction or chromaticity coordinates within a second region of the CIE xy chromaticity diagram that needs the chromaticity correction and that includes a plurality of correction regions, the plurality of correction regions being obtained by dividing the second region, and each of the correction regions having each of a plurality of chromaticity correcting means, the plurality of chromaticity correcting means being different from each other for each of the correction regions so that the chromaticity correction performed in each of the correction regions will be different than the chromaticity correction performed in the other correction regions; a third step of determining, if the measured chromaticity coordinates are the chromaticity coordinates within the second region, which of the plurality of correction regions the measured chromaticity coordinates fall within; a fourth step of correcting the gray-scale signal corresponding to the measured chromaticity coordinates falling within one of the correction regions by using the chromaticity correcting means corresponding to the one of the plurality of correction regions determined by the third step; and a fifth step of performing corrected image display.