Patent ID: 8692854
Filing Date: 2014-04-08
Classification: G09G,H04N

Abstract:
1. A method for generating a lookup table for color correction comprising: measuring tristimulus values for grayscales and tristimulus values for primaries displayed on a display device; storing the measured tristimulus values for the grayscales and the measured tristimulus values for the primaries in a storage unit of the display device; calculating measured stimulus values for the grayscales of the primaries according to the measured tristimulus values for the grayscales and the measured tristimulus values for the primaries in a processor of the display device; calculating a target maximum luminance value according to a target color temperature value and the measured tristimulus values for a maximum grayscale in the processor; calculating target tristimulus values for the grayscales according to the target maximum luminance value, the target color temperature value and a target gamma value in the processor; calculating target stimulus values for the grayscales of the primaries according to the target tristimulus values for the grayscales and the measured tristimulus values for the primaries in the processor; and when the target stimulus value for one grayscale of one primary is between measured stimulus values for two adjacent grayscales of the one primary, the processor using an interpolation method to calculate a sub-grayscale corresponding to the target stimulus value for the one grayscale of the one primary and between the two adjacent grayscales of the one primary, rounding the sub-grayscale to be a lookup value and then filling the lookup value in a cell corresponding to the one grayscale of the one primary in the lookup table.