Patent ID: 8384654

Claim:
A liquid crystal display apparatus that has a liquid crystal panel that displays a video by an input video signal, a light source that illuminates the liquid crystal panel, and a brightness detecting means to detect the surrounding brightness; and the liquid crystal display apparatus is adapted to change the luminance control characteristic thereof that defines the emission luminance of the light source to at least one feature quantity concerning the brightness of the input video signal corresponding to the brightness detected by the brightness detecting means, wherein the emission luminance of the light source is reduced to the feature quantity corresponding to decrease of the brightness detected by the brightness detecting means, and wherein the apparatus changes the luminance control characteristic by shifting the position of a characteristic change point, at which the slope of the luminance control characteristic changes, in the direction along which the emission luminance of the light source is reduced and, simultaneously shifting the position of the characteristic change point in order to (a) reduce a size of a region of the feature quantity that provides the highest brightness as the emission luminance of the light source is reduced or (b) increase a size of a region of the feature quantity that provides the lowest brightness as the emission luminance of the light source is increased.