Patent ID: 8253677

Claim:
A display device comprising: a display panel which comprises a plurality of dither blocks displaying an image that corresponds to a dither image signal; and an image signal controller which generates the dither image signal by using a dither pattern that determines a plurality of dither pixels, which are to be dithered, from among a plurality of pixels included in each of the dither blocks, wherein each of the dither blocks comprises a plurality of pixels, whose respective polarities are inverted at least every one frame and which are driven accordingly, and comprises equal numbers of positive-polarity dither pixels and negative-polarity dither pixels, and wherein a dither polarity matrix is associated with each dither block, a number of dither pixels included in each of the dither blocks is determined by a dither level, a dither set comprising a series of dither patterns for the dither level is assigned using a combined matrix for the dither level which is a sum of the respective dither polarity matrices of the series of dither patterns for said level.