A liquid crystal displayer and control method thereof are disclosed. The liquid crystal displayer capable of displaying image in a three dimensional mode comprises a display panel, a first timing controller, a second timing controller and a control module. The first timing controller and the second timing controller are electrically coupled to the display panel. While receiving multiple frames, the control module controls the first timing controller according to a refresh frequency of the frames, to feed the frames to the panel based on a frame clock, and controls the second timing controller to invert the signal polarity of the frames based on an inversion clock.