Patent ID: 8502841

Claim:
An image display apparatus comprising: a display panel having a plurality of display elements disposed in a matrix form; a storage unit that stores correction data for each display element used in correction processing for decreasing brightness variation among the plurality of display elements, including N, with N being an integer of 3 or more, number of correction values corresponding to N number of gradation values for each display element; a correction unit that reads the correction data from the storage unit and executes the correction processing; and a control unit, wherein the control unit divides the display panel into a plurality of sub-areas, calculates, for each sub-area, a select block gradation value which is a gradation value representing the sub-area, and executes, for each sub-area, control to read n, with n being an integer of 1 or more and less than N, number of correction values, which are used for calculating a correction value corresponding to the select block gradation value, out of the N number of correction values of each display element in the sub-area, using the correction unit, and the correction unit calculates, for each sub-area, a correction value corresponding to the select block gradation value using the n number of read correction values, and converts gradation values of video signals for display elements in the sub-area using the calculated correction value.