Patent ID: 7876316

Claim:
A reference voltage selection circuit that selects a plurality of reference voltages between a high-potential-side power supply voltage and a ground power supply voltage, the reference voltage selection circuit comprising: a first switch element that outputs a first selection voltage among the first selection voltage, a second selection voltage, and a third selection voltage arranged in potential descending order or potential ascending order as a first reference voltage among the first reference voltage and a second reference voltage arranged in potential descending order or potential ascending order; a second switch element that outputs the second selection voltage as the first reference voltage; a third switch element that outputs the second selection voltage as the second reference voltage; and a fourth switch element that outputs the third selection voltage as the second reference voltage, the first switch element outputting the first selection voltage as the first reference voltage on condition that the first switch element has been enabled based on data of a first bit of gamma correction data that contains at least three bits; the second switch element outputting the second selection voltage as the first reference voltage on condition that the second switch element has been enabled based on the data of the first bit of the gamma correction data and enabled based on data of a second bit of the gamma correction data; the third switch element outputting the second selection voltage as the second reference voltage on condition that the third switch element has been enabled based on the data of the first bit of the gamma correction data and enabled based on the data of the second bit of the gamma correction data; the fourth switch element outputting the third selection voltage as the second reference voltage on condition that the fourth switch element has been enabled based on the data of the first bit of the gamma correction data, disabled based on the data of the second bit of the gamma correction data, and enabled based on data of a third bit of the gamma correction data; the ground power supply voltage being supplied as the first selection voltage; and a current density of a channel region of a transistor that forms the first switch element being lower than a current density of a channel region of a transistor that forms a switch element among the second switch element, the third switch element, and the fourth switch element.