Patent ID: 8937587
Filing Date: 2015-01-20
Classification: G01K,G09G,H05B

Abstract:
1. A temperature estimating apparatus for a backlight including a plurality of light source blocks each having one light source or a plurality of light sources and in which light emission of the light source of each of the light source blocks can be regulated independently, the temperature estimating apparatus comprising: an acquiring unit which acquires a luminance of the light source for each of the light source blocks; a temperature sensor which measures a temperature of at least any one of an internal temperature of a casing and an external temperature of the casing of the image display apparatus having the backlight; an estimating unit which estimates a temperature of the light source for each of the light source blocks on the basis of a measured value obtained by the temperature sensor and a luminance value of the light source of each of the light source blocks acquired by the acquiring unit; and a storage unit which previously stores an adjacent influence coefficient to indicate a degree of an influence exerted on the temperature of the light source of the certain light source block by the luminances of the light sources of surrounding light source blocks of the light source block, wherein: the estimating unit estimates the temperature of the light source of each of the light source blocks on the basis of the luminance value of the light source of the concerning light source block, the luminance values of the light sources of the surrounding light source blocks disposed around the concerning light source block, and the adjacent influence coefficient.