| 摘要 |
<p>The purpose of the present invention is to suppress power consumption by a backlight during local dimming, and appropriately set the luminance of the backlight according to a gradation value of an image. An area active control unit (11) divides an input image into a plurality of regions, and, on the basis of the presence of a sub-region having a gradation value greater than a predetermined gradation value in each divided region, and on the number of sub-regions when there are sub-regions having gradation values greater than the predetermined gradation value, assigns a representative gradation value for each region as the maximum gradation value, the average gradation value, or a gradation value determined from the maximum gradation value and the average gradation value for each region, and changes the lighting rate of a light source corresponding to each region on the basis of the assigned representative gradation value.</p> |
