Patent ID: 7327341

Claim:
A display driver which drives a plurality of data lines arranged in columns and has a configuration in which a front drawing row can be designated, the data lines intersecting a plurality of scanning lines arranged in rows, and the display driver comprising: a front drawing row designation register which designates any one of the scanning lines as the front drawing row; a partial mode setting register which sets for the scanning lines either a normal display mode in which a drive voltage depending on gray-scale data is supplied to at least one of the data lines, or a partial non-display mode in which a partial non-display voltage is supplied to at least one of the data lines; a data line driver circuit including an operational amplifier section which drives at least one of the data lines based on the drive voltage, and a partial non-display voltage output section which drives at least one of the data lines based on the partial non-display voltage; and a partial display control section which controls driving of the data line driver circuit, wherein the partial display control section starts counting the drawing rows after a period corresponding to a value set in the front drawing designation register has elapsed in a vertical scanning period; wherein, when part of the scanning lines which are drawing rows including the front drawing row are set to the normal display mode, the partial display control section drives at least one of the data lines by using the operational amplifier section based on the drive voltage, in a select period of the scanning lines; and wherein, when part of the scanning lines which are the drawing rows are set to the partial non-display mode, the partial display control section limits or stops an operating current of the operational amplifier section, and drives at least one of the data lines by using the partial non-display voltage output section based on the partial non-display voltage, in a select period of the scanning lines.