Patent ID: 8344985

Claim:
A liquid crystal display, comprising: a liquid crystal panel comprising a plurality of pixel units; a timing controller configured to receive display signals from an external circuit to drive the pixel units; a data processor comprising a calculation circuit and an analyzing circuit; and a common voltage circuit; wherein the calculation circuit is configured to carry out a predetermined calculation between display signals corresponding to the pixel units in a current frame period and display signals corresponding to the pixel units in a previous frame period, the analyzing circuit is configured to provide a compensating signal according to a result of the calculation, and the common voltage circuit is configured to adjust a reference voltage signal according to the compensating signal so as to generate a common voltage signal for the pixel units; and wherein the calculation circuit further comprises a plurality of subtraction units, each of the subtraction units is configured to carry out a subtracting calculation between a first display signal corresponding to one of the pixel units in the current frame period and a second display signal corresponding to said pixel unit in the previous frame period.