Source driver, electro-optical device, projection-type display device, and electronic instrument

A source driver that drives a source line of an electro-optical device based on grayscale data, the source driver comprising:

• P grayscale signal lines, P being a positive integer equal to or larger than two, a corresponding grayscale voltage being supplied to each of the P grayscale signal lines;
• Q switch signal lines, Q being a positive integer equal to or smaller than P, a corresponding grayscale voltage being supplied to each of the Q switch signal lines;
• a first DAC that outputs a grayscale voltage among P grayscale voltages that are supplied to the P grayscale signal lines based on the grayscale data;
• a second DAC that outputs a grayscale voltage among Q grayscale voltages that are supplied to the Q switch signal lines based on the grayscale data;
• and
• a source line driver section that drives the source line based on an output from the first DAC or the second DAC,
• the source line driver section generating a second drive signal of the source line based on the output from the second DAC, and then generating a first drive signal of the source line based on the output from the first DAC within one horizontal scan period.