a display panel comprising a plurality of pixels which are connected to a plurality of gate lines and a plurality of source lines, and are arranged in a plurality of rows and a plurality of columns;

a plurality of switch circuits configured to electrically connect source lines, included in each of a plurality of source line groups of the plurality of source lines, to one another based on each of a plurality of group switch control signals to perform charge sharing; and

a charge sharing controller configured to generate each of the plurality of group switch control signals based on first bits of each of a plurality of (K−1)^th digital data groups and second bits of each of a plurality of K^th digital data groups,

wherein the plurality of (K−1)^th digital data groups correspond to pixel values of a (K−1)^th row of the display panel, the plurality of K^th data digital groups correspond to pixel values of a K^th row of the display panel, where K is a natural number greater than one,

wherein the charge sharing controller is configured to, with respect to each of the plurality of source line groups, activate each of the plurality of group switch control signals to perform the charge sharing in response to the first bits satisfying a first condition, and the first bits and the second bits satisfying a second condition, and

wherein the first bits and the second bits are not compared to each other to output a count value.