An image display device configured to perform signal processing on a video signal (Vin) and thereby to display an image, the image display device comprising: a display panel; a first storage unit configured to store one frame of the input video signal (Vin) and to output a video signal of the previous frame; and a gradation change detection unit configured to compare the input video signal (Vin) with the video signal of the previous frame output from the first storage unit to determine, for each pixel, whether a gradation value (Din) changes from the previous frame. a hold count calculation unit configured to determine, for each pixel, a hold count (Cnt**) indicating a number of frames input after the change of the gradation value by setting the hold count (Cnt**) to one if the gradation value (Din) changes and adding one to the hold count (Cnt**) if the gradation value (Din) does not change; a second storage unit configured to store the hold counts (Cnt**) determined by the hold count calculation unit; an emphasis conversion unit configured to determine an emphasis video signal; and a drive unit configured to drive the display panel based on the emphasis video signal; characterized by a third storage unit configured to store, for each pixel and in case where a gradation value (Din) of a pixel included in an input video signal (Vin) changes from the previous frame output from the first storage unit as determined by the change detection unit, the gradation value (Din) before change; and wherein the emphasis conversion unit is configured to determine the emphasis video signal based on the input video signal (Vin), the gradation values (Din(hold)**) before change which are stored in the third storage unit, and the hold counts (Cnt**) determined by the hold count calculation unit, the emphasis video signal (Dout(n)) compensating for optical response characteristics of the display panel. a display panel; a first storage unit configured to store one frame of the input video signal (Vin) and to output a video signal of the previous frame; and a gradation change detection unit configured to compare the input video signal (Vin) with the video signal of the previous frame output from the first storage unit to determine, for each pixel, whether a gradation value (Din) changes from the previous frame. a hold count calculation unit configured to determine, for each pixel, a hold count (Cnt**) indicating a number of frames input after the change of the gradation value by setting the hold count (Cnt**) to one if the gradation value (Din) changes and adding one to the hold count (Cnt**) if the gradation value (Din) does not change; a second storage unit configured to store the hold counts (Cnt**) determined by the hold count calculation unit; an emphasis conversion unit configured to determine an emphasis video signal; and a drive unit configured to drive the display panel based on the emphasis video signal; characterized by a third storage unit configured to store, for each pixel and in case where a gradation value (Din) of a pixel included in an input video signal (Vin) changes from the previous frame output from the first storage unit as determined by the change detection unit, the gradation value (Din) before change; and wherein the emphasis conversion unit is configured to determine the emphasis video signal based on the input video signal (Vin), the gradation values (Din(hold)**) before change which are stored in the third storage unit, and the hold counts (Cnt**) determined by the hold count calculation unit, the emphasis video signal (Dout(n)) compensating for optical response characteristics of the display panel.