The invention discloses a liquid crystal display, comprising a control chip, a P-Gamma IC (Integrated Circuit) and a display module which are electrically connected with each other, wherein the control chip outputs periodic signals and transmits the periodic signals to the P-Gamma IC, so that the P-Gamma IC generates periodically variable Gamma voltage; the P-Gamma IC transmits the Gamma voltage to the display module, thus driving liquid crystal molecules in the display module to deflect. The liquid crystal display can realize periodic variation of the Gamma voltage, thus reducing and eliminating polarization to eliminate the image sticking phenomenon in the liquid crystal display.