Patent ID: 8115710

Claim:
A liquid crystal display control circuit, comprising: an edge-detecting circuit for detecting image edges in a current frame of an image data, to divide data of the current frame into an edge data and a non-edge data; a memory coupled to the edge-detecting circuit, for saving an edge data of a previous frame of the image data without saving a non-edge data of the previous frame; a driving-decision circuit coupled to the edge-detecting circuit and the memory, for generating a driving voltage setting according to the non-edge data of the current frame outputted by the edge-detecting circuit, and generating an overdriving voltage setting according to the edge data of the previous frame and the edge data of the current frame outputted by the edge detecting circuit, and the driving-decision circuit comprises: a non-edge-driving decision circuit for receiving the non-edge data of the current frame and generating the driving voltage setting corresponding to non-edge parts of the current frame; an edge-driving decision circuit for receiving the edge data of both the current frame and the previous frame to generate the overdriving voltage setting corresponding to edge parts of the current frame; and a weighted circuit coupled to the non-edge-driving decision circuit and the edge-driving decision circuit, for executing a weighted operation according to the driving voltage setting and the overdriving voltage setting to adjust the overdriving voltage setting corresponding to the edge parts of the current frame; and an output device coupled to the driving decision circuit, for outputting the driving voltage setting and the overdriving voltage setting; wherein the output device is a multiplexer.