Patent ID: 8184088

Claim:
An image display apparatus comprising: a liquid crystal panel including a plurality of pixels arranged in a matrix form; a back light including a luminous region to supply light to the liquid crystal panel, the luminous region being divided into a plurality of partial regions, light adjustment being possible for each of the partial regions; a luminance calculation unit configured to calculate a luminance setting value of light emitted from each partial region of the back light on the basis of an image signal; a luminance modification unit configured to modify the luminance setting value so as to make a luminance difference between adjacent partial regions of the back light smaller; a luminance distribution calculation unit configured to calculate a predicted value of luminance distribution of light incident on the liquid crystal panel from the back light on the basis of the modified luminance setting value; a liquid crystal transmittance correction unit configured to correct an optical transmittance of the image signal at each pixel of the liquid crystal panel on the basis of the image signal and the luminance distribution; a back light control unit configured to control the back light on the basis of the modified luminance setting value; and a liquid crystal control unit configured to control the liquid crystal panel so that the transmittance of the image signal becomes the corrected optical transmittance, wherein the luminance modification unit calculates difference values by subtracting a luminance setting value in a first partial region from luminance setting values in second partial regions located near the first partial region of the back light, calculates weights so as to make the weight greater as the difference value is larger, calculates a weighted average value of luminance setting values in the second partial regions by using the calculated weights, and uses the weighted average value as a new luminance setting value in the first partial region.