Patent ID: 7505026

Claim:
An image display device comprising: an image inputting unit configured to input an input image; a display ratio controller which controls a black display ratio which is a ratio of a period for displaying a black image in one frame period in a frame of the input image; a period setting unit which sets a black display period and an image display period for displaying the frame on the basis of the black display ratio; a brightness compensator which obtains brightness compensation information for compensating brightness of the frame according to the black display ratio; and a display which displays the frame and the black image, the display ratio controller comprising: a ratio fixer which determines the black display ratio; a transient black display time ratio calculator which calculates a transient black display ratio, which is a ratio between the current black display ratio fixed by the ratio fixer and a new black display ratio fixed by the ratio fixer; and a transient black display time ratio setting unit which sets the black display ratio relating at least to the display of one frame from the current black display ratio to the transient black display ratio and then setting the black display ratio to the new black display ratio, wherein the display displays a brightness compensation image based on the brightness compensation information and the frame in the image display period, and displays the black image in the black display period.