Patent ID: 6919869
Filing Date: 2005-07-19
Classification: G09G

Abstract:
1. A liquid crystal display device comprising: a liquid crystal panel having a plurality of scanning lines and a plurality of signal lines; a standard voltage generating circuit providing a plurality of standard voltages; a vertical driver that scans the scanning lines of said liquid crystal panel one after another; a horizontal driver that receives the plurality of standard voltages provided from said standard voltage generating circuit and supplies said standard voltages to said liquid crystal panel according to gradation data to the signal lines of said liquid crystal panel; and a control circuit that creates said gradation data by inverting a polarity of input data for each horizontal synchronization cycle and controls the horizontal drivers so as to apply standard voltage corresponding to said gradation data to the liquid crystal panel; wherein a gradation-γ correction voltage relation used by said control circuit for gradation display is symmetrical with respect to a point in a center between a top gradation step and a bottom gradation step.