Patent ID: 6956592

Claim:
An image display device including a panel having a first electrode which extends in a first direction to write image data and a second electrode which extends in a second direction to select a display line, wherein a field period is divided into a plurality of sub-field periods that each have a predetermined luminance weight, and a gray-scale image for the field period is displayed by (a) writing sub-field image data of each sub-field period obtained by dividing input image data of the field period into the plurality of sub-field periods, into the panel through the first electrode and the second electrode, and (b) sustaining an illumination state of ON or OFF in each cell for each sub-field period using luminance equivalent to a luminance weight of each sub-field period, based on the written sub-field image data, the image display device comprising an image changing unit for sequentially scanning cells adjacent in the second direction which is the vertical direction when driving the panel and for changing a part of sub-field image data of a predetermined sub-field period, so that a total number of charges and discharges performed on the first electrode when writing the sub-field image data becomes smaller.