Patent ID: 8427462

Claim:
A liquid crystal display apparatus comprising: a liquid crystal panel; a backlight provided on a rear face of the liquid crystal panel; a detector which detects RGB output light levels of the backlight; a first controller which controls backlight current for driving the backlight so that a prescribed luminance is attained based on the RGB output light levels detected by the detector; a second controller which controls display signals supplied to the liquid crystal panel so that a prescribed chromaticity is attained based on the RGB output light levels detected by the detector; a first converter which converts the RGB output light levels detected by the detector into tristimulus values; a second converter which converts the tristimulus values into a luminance value and chromaticity values, wherein the first controller controls the backlight current for driving the backlight based on the luminance value converted by the second converter, and the second controller controls the display signals supplied to the liquid crystal panel based on the chromaticity values converted by the second converter, and wherein the first controller controls the backlight current so that the luminance value converted by the second converter matches a prescribed expected value; and a corrector which corrects the prescribed expected value when the first controller controls the backlight current for driving the backlight, in order to prevent luminance variation in the liquid crystal panel produced when the second controller controls the display signals supplied to the liquid crystal panel.