Patent ID: 6771243
Filing Date: 2004-08-03
Classification: G09G,H04N

Abstract:
A display device comprising:a display unit on which a video image made up of a plurality of pixels is displayed; a driving unit for driving the display unit; a video signal memory unit for storing a video signal supplied from outside; and a control unit adapted to generate a display signal in accordance with the video signal stored on said video signal memory unit to control driving operation of said driving unit made on said display unit by using the display signal, the display signal being indicative of a video image to be displayed on said display unit for a given frame period, said control unit comprising: calculating means for calculating a value of luminance for a video image to be displayed for a first frame period and a value of luminance for a video image to be displayed for a second frame period subsequent to the first frame period, the values of luminance being calculated for each one of pixels in accordance with the video signal supplied from outside; comparing means for comparing the value of the luminance for the video image to be displayed for the first frame period and the value of the luminance for the video image to be displayed for the second frame period; determining means for determining, according to the comparison result, whether it is necessary to insert a black period into the first frame period to display a black image; and generating means for generating the display signal for the first frame period when said determining means determines that the black period is required, the display signal to be generated having the black period and a video display period for displaying a video image.