Patent ID: 7227543
Filing Date: 2007-06-05
Classification: G09G,H04N

Abstract:
1. An image display apparatus for displaying an image based on an image signal, comprising: a contrast adjustment controller which adjusts a contrast of the image by controlling a gain of the image signal using a maximum picture level and an average picture level of a luminance information in the image signal; a color correction circuit which carries out a color correction to increase a color depth of the image signal when the contrast adjustment controller increases the contrast of the image; and a display unit for displaying an image based on an output image signal having been processed by the contrast adjustment controller and the color correction circuit, wherein: the contrast adjustment controller increases the contrast of the image, when the maximum picture level of the luminance information in the image signal is lower than a highest tone level of the image and the average picture level of the luminance information in the image signal is lower than a predetermined value; and the color correction circuit carries out the color correction to increase the color depth of the image signal when the contrast of the image adjusted by the contrast adjustment controller is a predetermined value or higher.