Liquid crystal display device with periodical changed voltage difference between data voltage and common voltage and driving method thereof

Abstract

An exemplary liquid crystal display device () includes a plurality of pixel electrode (), a common electrode (), a data driving circuit () configured for providing data voltages to each pixel electrode, and a common voltage generating circuit () configured for providing a common voltage to the common electrode. The common voltage generating circuit includes a hysteresis comparator circuit () and a direct current voltage adjusting circuit (). The hysteresis comparator circuit is configured for providing an alternating current voltage, and the direct current voltage adjusting circuit is configured for providing a direct current voltage with periodic change. The direct current voltage is configured for superimposing on the alternating current voltage to form a common voltage, and an absolute value of the common voltage changes only slightly within a predetermined range from each frame to the next adjacent frame. A method for driving the liquid crystal display device is also provided.