Signal processing method and an image information displaying apparatus the image information

PROBLEM TO BE SOLVED: To solve the serious problem of reducing the power consumption when the diagonal size of a liquid crystal TV or the like increases because the power consumption of a backlight increases in accordance with the increase of the diagonal size. SOLUTION: In an image information display device provided with auxiliary light sources, auxiliary light sources are divided into a plurality of groups, and the light output of each group of auxiliary light sources is controlled in accordance with the signal of image information, and simultaneously, the signal intensity is calculated again in accordance with the light output of auxiliary light sources. COPYRIGHT: (C)2005,JPO&NCIPI