An LCD device, which is cost effective, is discussed. According to one embodiment, the LCD device includes a timing controller to generate an initial POL signal; a signal stabilizer to receive the initial POL signal from the timing controller and a constant voltage from a source, and to generate a stabilized POL signal using the received constant voltage and the received initial POL signal; and a common voltage generator to generate a common voltage signal using the stabilized POL signal and to supply the generated common voltage signal to an LCD panel.