Patent ID: 8749473

Claim:
A video display device, comprising: a display panel that displays a video signal; a backlight with use of an LED as a light source for illuminating the display panel; and a control portion that controls luminance for emitting light of the backlight, the control portion divides the backlight into a plurality of areas and controls light emission of the LED for each of the divided areas, wherein the control portion decides, in accordance with a first feature value of a video in a display area corresponding to each of the divided areas, first luminance of the LED for each of the areas, further decides, for the first luminance for each of the areas, second luminance for each of the areas where the first luminance is uniformly multiplied by a certain multiplying factor within a range where total drive current values of the LED are not greater than a predetermined allowable current value, further compares the second luminance for each of the areas to a predetermined threshold value, and only for an area where the second luminance is lower than the threshold value, lowers the second luminance again so as to be equal to the first luminance in the area or so as to fall within a predetermined range of the first luminance to provide a third luminance, allocates the total of decreased luminance in an area having luminance smaller than the threshold value to an area where the second luminance is equal to or more than the threshold value, and increases the second luminance by the allocated luminance to provide a fourth luminance, and controls light emission of the LED for each of the divided areas using the third luminance and the fourth luminance.