Patent ID: 8912998
Filing Date: 2014-12-16
Classification: G09G

Abstract:
1. A luminance control device that controls luminance of a light source as backlight of a display panel, comprising: a picture luminance detector for detecting luminance of an input picture signal; a picture luminance storage for storing a plurality of luminance detected before the luminance of the picture signal detected by the picture luminance detector; and, a processor that detects variability that indicates intensity of variation of the luminance of the picture signal based on the plurality of luminance stored in the picture luminance storage and controls luminance of a light source based on the luminance of the picture signal detected by the picture luminance detector and the variability, wherein the processor calculates a directional characteristic of the variation of the picture luminance, and increases the amount of reduction in the light source luminance when the directional characteristic of the variation is on a downward trend and suppresses the amount of reduction in the light source luminance when the directional characteristic of the variation is on an upward trend.