Patent ID: 8274461
Filing Date: 2012-09-25
Classification: G09G

Abstract:
1. An apparatus for driving a liquid crystal display, the apparatus comprising: a transition check unit which determines whether there has been a change between an input image signal of a first frame, and an input image signal of a second frame and whether there has been a change between the input image signal of the second frame and an input image signal of a third frame; an overdrive control unit which overdrives the input image signal of the second frame in an overdrive direction when the transition check unit determines that there has been a change between the input image signal of the first frame and the input image signal of the second frame, wherein the overdrive direction is the same as a changed direction of the input image signals of the first frame and the second frame; an overdrive compensation unit which changes the input image signal of the third frame in an opposite direction to the overdrive direction when the transition check unit determines that there has not been a change between the input images of the second and third frames; and a data selection unit which outputs one of an input image signal, the input image signal which is overdriven in the overdrive control unit, and the input image signal which is changed in the opposite direction to the overdrive direction in the overdrive compensation unit according to the determination in the transition check unit; wherein the data selection unit outputs the input image signal which is overdriven in the overdrive control unit when the transition check unit determines that there has been a change between the input image signals of the first and second frames, and outputs the input image signal which is changed in the opposite direction to the overdrive direction in the overdrive compensation unit when the transition check unit determines that there has not been a change between the input image signals of the second and third frames.