A display driver includes a driving circuit and a control circuit. An electro-optical panel includes plural sampling sections respectively provided for a predetermined number of plural source lines. The control circuit causes a relative time relationship between an ith graded output period of the driving circuit and an ith active period of an enable signal when a sampling operation is enabled for the ith sampling section to differ from a relative time relationship between a jth graded output period of the driving circuit and a jth active period of the enable signal when the sampling operation is enabled for the jth sampling section.