Patent ID: 7038702

Claim:
A display device comprising: a pixel circuit in which a plurality of intersecting data lines and scan lines intersections, pixels being formed near said intersections; a data line driver including a gradation voltage generating circuit formed from a plurality of voltage level generating circuits, using a gradation data representing color concentration of an original image received from a higher-level device to select a gradation voltage generated by said plurality of voltage level generating circuits, and using an internally generated display sync signal to output said selected gradation voltages a line at a time to said data lines; a scan line driver using said display sync signal to output scan voltages to said scan lines for sequential selection of said scan lines; and a power supply circuit generating said gradation voltages, said scan voltages, and reference potentials needed to drive said display device; wherein said data line driver reduces a color count information size in said gradation data received from said higher-level device by dithering processing based on a color reduction rate data and halts the operation of a portion of said plurality of voltage level generating circuits based on said color reduction rate data.