Patent ID: 8305339

Claim:
An image displaying apparatus having a backlight to emit light and a liquid crystal panel to display an image in a display region by modulating light from the backlight, comprising: a light-source luminance calculator configured to calculate light-source luminance of the light emitted by the backlight based on pixel values of an input image; a gray level converting unit configured to convert gray levels of the input image based on the light-source luminance to a converted image; a cumulative light-emission amount calculator configured to calculate a cumulative light-emission amount by summing up light-source luminance for an arbitrary period for which an image is displayed at a time before the input image is displayed; a comparing unit configured to compare the cumulative light-emission amount with a reference light-emission amount determined in advance; a light-source luminance correcting unit configured to correct the light source luminance to a smaller value when the difference between the cumulative light-emission amount and the reference light-emission amount is smaller than a reference to obtain corrected light-source luminance; and a controller configured to carry out control to write the converted image to the liquid crystal panel and cause the backlight to emit light based on the corrected light-source luminance.