Patent ID: 8243104

Claim:
An image display apparatus having a light modulation unit configured to receive image data and form an image by modulating light from a light source according to the image data, the image display apparatus comprising: a chromatic information detector configured to detect a magnitude of a chromatic component of an image expressed by the image data; a light source control data generator configured to generate light source control data for controlling brightness of the light source according to the magnitude of the chromatic component; a light source controller configured to control the brightness of the light source according to the light source control data, a luminance information detector configured to detect a magnitude of a luminance component in each pixel of the image expressed by the image data; an image control data generator configured to generate image control data for modifying gradation levels of each pixel in the image expressed by the image data according to the magnitude of the luminance component and the light source control data; and an image control unit configured to modify the image data according to the image control data; wherein the light modulation unit is configured to modulate the light from the light source according to the modified image data; and wherein the chromatic information detector includes a minimum value detection unit for detecting a minimum value of color components for each pixel and detects the magnitude of chromatic component using the minimum value.