A display driver includes a plurality of source amplifiers configured to drive a plurality of source lines of a display panel, and an amplifier control system configured to control the source amplifiers. Each of the source amplifiers is configured to drive a source line with a drive voltage corresponding to a grayscale value specified by an image data associated with each of the source amplifiers. The amplifier control system is configured to control execution and stopping of an amplifying operation of each of the source amplifiers based on the image data associated with each of the source amplifiers is a grayscale value corresponding to black portions of the display panel.