Patent ID: 8358265
Filing Date: 2013-01-22
Classification: G09G

Abstract:
1. An image display apparatus comprising: an image display unit to display an image on a display area; an illuminance detecting unit configured to detect an ambient illuminance of the image display unit; a backlight unit to emit a light; an adaptation calculating unit configured to calculate an adaptation amount of an eye, based on the ambient illuminance; a surface reflection calculating unit configured to calculate a light reflection luminance on the display area, based on the ambient illuminance; an adaptation control unit which calculates ideal gradation luminance for a plurality of gradations, respectively, based on the adaptation amount of the eye, the ideal gradation luminance being indicative of display luminance necessary to achieve predetermined brightness at the ambient illuminance; and calculates a first screen luminance being a screen luminance to be set on the backlight unit, based on the reflection luminance; a luminance setting unit configured to set a light luminance based on the first screen luminance; and a signal processing unit configured to convert gradations of an input video signal based on differences between the reflection luminance and the ideal gradation luminance corresponding to the gradations, wherein: