Power supply circuit, display driver, electro-optical device, electronic instrument, and method of controlling power supply circuit

摘要

A power supply circuit including a high-potential-side voltage generation circuit and a low-potential-side voltage generation circuit which respectively generate a high-potential-side voltage and a low-potential-side voltage to be supplied to a common electrode, and alternately supplying the high-potential-side voltage and the low-potential-side voltage to the common electrode as a common electrode voltage so that polarity of the common electrode voltage is the same in consecutive first and second horizontal scan periods. When a precharge voltage of data lines in a precharge period in the first horizontal scan period is higher than the average voltage of the data lines set after the precharge period, the power supply circuit controls the supply capability of the common electrode voltage in a precharge period of the data lines in the second horizontal scan period.