Patent ID: 7855710
Filing Date: 2010-12-21
Classification: G09G

Abstract:
1. A circuit for driving an electro-optical device, the electro-optical device having a plurality of scanning lines, a plurality of data lines divided into groups, each group having a predetermined number of data lines, and a plurality of pixels disposed to correspond to intersections of the plurality of scanning lines and the plurality of data lines, the circuit for driving an electro-optical device comprising: a scanning line driving circuit that selects each of the plurality of scanning lines for each selection period, the selection period including a plurality of data output periods; a plurality of image signal lines; a plurality of switching elements that switch between conductive states and non-conductive states of the data lines belonging to each group and the image signal line corresponding to each group; a control circuit that sequentially switches the switching elements corresponding to each group to the conductive states for each data output period in the selection period; and a voltage output circuit that (1) simultaneously applies, in a precharge period prior to the plurality of data output periods of the selection period, a predetermined precharge voltage to each image signal line, (2) applies a voltage according to a gray-scale level of each pixel to each image signal line in each data output period of the selection period, (3) applies a predetermined voltage to each image signal line in a period after the last data output period of the selection period has lapsed, and (4) applies the predetermined precharge voltage to each image signal line simultaneously after one selection period has lapsed, wherein the predetermined voltage is selected in advance regardless of the gray-scale level of each pixel, wherein the predetermined precharge voltage is different from the predetermined voltage, wherein the switching elements are in non-conductive states during the period after the last data output period of the selection period has lapsed such that the predetermined voltage is applied only to the image signal lines, and wherein each image signal line supplies the gray-scale voltage to a corresponding group.