Patent ID: 7242377

Claim:
An image display device comprising: an adjusting circuit that adjusts inputted image signals based on an adjusting value to be sequentially up-to-dated; a non-linear converting circuit at a stage after said adjusting circuit, said non-linear converting circuit that converts inputted signals into signals in a non-linear manner; a display brightness characteristics value detecting circuit at a stage after said non-linear converting circuit, said display brightness characteristics value detecting circuit that sequentially detects a display brightness characteristics value indicating lightness of a display image from inputted signals; a brightness refraining value outputting circuit that sequentially outputs a brightness refraining value that refrains lightness of said display image based on said display brightness characteristics value; and an adjusting value outputting circuit that applies a conversion having characteristics being inverse with relative to a converting characteristics of said non-linear converting circuit or conversion having characteristics approximate to the inverse characteristics, to said brightness refraining value to output said adjusting value.