Patent ID: 9520104
Filing Date: 2016-12-13
CPC Classification: G09G

Claim Text:
1. An image display device comprising: an input value adjustment unit, defined by an image processor, which applies a gain or offset to input values of image data; a LUT which is a table of correction data used to correct the input values of image data having a gain or offset applied thereto by the input value adjustment unit and which is a table indicating a relationship between LUT input values that are uncorrected values and LUT output values that are corrected values of the LUT input values; a display which displays images based on the input values of the image data that have been corrected based on the LUT correction data; a conforming adjustment value acquisition unit which acquires conforming adjustment values, where the conforming adjustment values are defined as being adjustment values which are the values of gain or offset applied to the input values of image data of an adjustment image by the input value adjustment unit when a color balance of the adjustment image displayed on the display becomes a specified color balance; a LUT extension unit setting unit which sets a LUT extension unit which is a table indicating a relationship between extension unit input values which are values greater than a maximum value that a LUT input value of the LUT can take and extension unit output values which are corrected values of the extension unit input values; and a LUT calculation unit which calculates the LUT correction data based on the conforming adjustment values acquired by the conforming adjustment value acquisition unit, the input values of the image data of the adjustment image, the LUT correction data, and the correction data of the LUT extension unit that has been set by the LUT extension unit setting unit; wherein if the LUT output value corresponding to the maximum value that the LUT input value of the LUT can take does not reach the maximum value that the LUT output value of the LUT can take, and also the conforming adjustment value acquired by the conforming adjustment value acquisition unit is greater than a reference adjustment value which is an initial value of the adjustment value applied by the input value adjustment unit to the input values of the image data of the adjustment image, then the LUT extension unit is set; and the conforming adjustment value acquisition unit, the LUT extension unit setting unit, and the LUT calculation unit setting unit are defined by a microcomputer.