Patent ID: 6795053
Filing Date: 2004-09-21
Classification: G06F,G09G

Abstract:
An image display apparatus operable to display a video signal inputted on a passive light modulation part including a light source as an image, said apparatus comprising:a characteristics detection part operable to receive the video signal and to detect a maximum brightness level (hereinafter, referred to as MAX), a minimum brightness level (hereinafter, referred to as MIN), and an average brightness level (hereinafter, referred to as APL) of the video signal; a control data generation part operable to receive the MAX, MIN, and APL, and to generate signal control data indicating an instruction for amplification and light source control data for making the light source light at an intensity that an average brightness level of the image displayed on the passive light modulation part based on the video signal after amplification becomes equivalent to salt the APL; a signal control part operable to receive the video signal and the signal control data, and to amplify the maximum amplitude of the video signal to a width of a dynamic range in accordance with the signal control data; and a light source control part operable to receive the light source control data and to control brightness of the light source in accordance with the light source control data.