Patent ID: 7375705
Filing Date: 2008-05-20
Classification: G09G,G11C

Abstract:
1. A reference voltage generation circuit for generating a plurality of reference voltages including a reference voltage selected corresponding to grayscale data, the reference voltage generation circuit comprising: a gamma correction resistor circuit which includes a resistor circuit and outputs the reference voltages generated by resistively dividing voltages of two opposite ends of the resistor circuit to a plurality of resistive division nodes; and first and second voltage supply circuits which supply a high-potential-side voltage and a low-potential-side voltage to the two opposite ends of the resistor circuit, respectively, wherein the first and second voltage supply circuits supply at least one of the high-potential-side voltage and the low-potential-side voltage to the two opposite ends of the resistor circuit, respectively, by switching the high-potential-side voltage and the low-potential-side voltage for each of color components which form one pixel, the high-potential-side voltage and the low-potential-side voltage being provided for each of the color components, and wherein the gamma correction resistor circuit supplies each of the reference voltages to one of a plurality of reference voltage signal lines to be selected as inputs of first and second driver sections, the reference voltages being switched for each of the color components, and the first and second driver sections respectively driving first and second data lines of an electro-optical device.