Patent ID: 8378942
Filing Date: 2013-02-19
Classification: G09G

Abstract:
1. A source driver that drives a source line of an electro-optical device based on (j+k)-bit grayscale data, j being a natural number, k being a natural number, the source driver comprising: 2 a grayscale voltage select circuit that outputs two grayscale voltages based on higher-order j-bit data among 2 a source line driver circuit having a voltage follower circuit, the voltage follower circuit including a differential amplifier having a differential transistor pair, and a driver section driving the source line based on an output from the differential amplifier; the differential transistor pair including a first differential transistor group and a second differential transistor group, the second differential transistor group including first to k transistor groups, each group of the first to k transistor groups including 2 the source line driver circuit outputting a grayscale voltage corresponding to lower-order k-bit data between the low-potential-side grayscale voltage and the high-potential-side grayscale voltage to the source line by supplying a corresponding signal of one-bit data among the lower-order k-bit data to a gate of a corresponding transistor in a corresponding transistor group among the first to k transistor groups, the corresponding signal being set to be either one of the low-potential-side grayscale voltage and the high-potential-side grayscale voltage.