Brightness characteristic correction method of the image display apparatus and a video display device

Having a multiplier input image data is input, and the multiplier output adder input, a memory storing correction data to be supplied to the multiplier and the adder, and a control unit. In the memory, the respective correction data for the plurality of luminance correction points of one display dot are prepared, and the correction data includes correction data for addition and for multiplication for the video data. Under the control of the control unit, to the image data corresponding to each display dot at the multiplier, respectively multiplied by the correction data for multiplication (ST1, ST2), the video data of the multiplication result at the adder further adds or subtracts the correction data for addition and subtraction (ST3), and outputs the image data obtained by this addition process in the corresponding display dot (ST4).