Patent ID: 8300000

Claim:
A liquid crystal display (LCD) device, comprising: a liquid crystal display panel, comprising multiple gate lines, multiple data lines and multiple pixels having a common electrode, the data lines intersecting with and electronically isolated from the gate lines; a gate driving circuit to successively send gate-scanning signals to the gate lines, respectively; a common voltage generating circuit to send a common voltage to the common electrode; and a data driving circuit to send a gray level voltage signal to the data lines while one of the gate lines is being scanned, the gray level voltage signal comprising multiple voltage levels sent to the data lines, respectively, wherein the common voltage comprises at least three square waves having three non-identical periods, each of the at least three square waves corresponds to a frame period and has a substantially constant period, and the at least three square waves comprise a first square wave having a first period which is twice the period of each gate-scanning signal, a second square wave having a second period which is four times to the period of each gate-scanning signal, and a third square wave having a third period which is six times to the period of each gate-scanning signal.