Patent ID: 8125437

Claim:
An over-driving device for a display device comprising a plurality of pixels and displaying images in successive frames, with the over-driving device comprising: a compression circuit for receiving and compressing a first image signal to generate a first compression image signal in a first frame, and receiving and compressing a second image signal to generate a second compression image signal in a second frame following the first frame; a buffer, coupled to the compression circuit, for receiving and temporarily storing the first compression image signal in the first frame and outputting the stored first compression image signal to serve as a first buffering image signal in the second frame; a comparison circuit, coupled to the compression circuit and the buffer, for receiving and comparing the second compression image signal and the first buffering image signal and generating an enable signal according to a comparison result in the second frame; a decompression circuit, coupled to the buffer, for receiving and decompressing the first buffering image signal to generate a previous image signal in the second frame; and an over-driving unit for receiving the second image signal to serve as a current image signal, receiving the previous image signal and the enable signal, and determining to over drive the display device or not according to the enable signal in the second frame.