| 摘要 |
PROBLEM TO BE SOLVED: To provide a display device capable of realizing an appropriate screen display luminance in accordance with a video characteristic amount and ambient brightness, and sufficiently reducing power consumption. SOLUTION: A liquid crystal display device 1 includes: a liquid crystal panel 20 for displaying a video by an input video signal; a backlight unit 17 as a light source for irradiating the liquid crystal panel 20; and a brightness sensor 24 for detecting the brightness around the liquid crystal display device 1. According to the brightness detected by the brightness sensor 24, a luminance conversion characteristic defining the light emission luminance of the backlight for the characteristic amount (such as APL) of the input video signal is changed. Here, the luminance conversion characteristic is changed so that the light emission luminance is reduced as the brightness around the liquid crystal display device becomes darker and the position of the characteristic modification point as the point where the inclination of the luminance conversion characteristic is changed is shifted in the direction of the characteristic amount change. According to the obtained luminance conversion characteristic, the light emission luminance of the backlight is controlled. COPYRIGHT: (C)2007,JPO&INPIT |
