Patent ID: 8633950
Filing Date: 2014-01-21
Classification: G09G,H04N

Abstract:
1. An image display device displaying a picture using a picture signal from an external device as an input value and using an output value obtained by correcting or converting the input value by a gamma curve, wherein the input value is a gray level x of the image signal (where x is an integer satisfying 0≦x≦2 the gray level x and the luminance relative value Y(x) have a relationship determined in a one-on-one manner; and there are at least one or more gray levels x between a gray level 0 and the maximum gray level x max when defining gradients R(x i −1, x i ) and R(x i , x i +1) according to: the image display device has a gamma curve adjusted to have one or more gray levels x between the gray level x j and the maximum gray level x max when defining gradients R(x j −1, x j ) and R(x j , x j +1) according to: and a gamma curve obtained by connecting coordinates of points denoted by the gray level x and the luminance relative value Y(x) in a range of 0≦x≦2 at least one or more points except for (0, Y org (0)) and (2 n −1, Y org (2 n −1)), wherein the gray level x is an integer, and wherein a point at which the gamma curve and the reference gamma curve Y