Patent ID: 8049742

Claim:
An image data refreshing method used in an image data display device, the method comprising: (a) defining a refreshing center of a display area according to a visual focus of a present frame displayed on the display area; (b) dividing the display area into at least a first sub-display area and a second sub-display area according to the refreshing center, wherein the refreshing center is located within the first sub-display area which is surrounded by the second sub-display area; (c) setting the refreshing rate of image data of the first sub-display area and that of the second sub-display area respectively; and (d) refreshing the image data of the first sub-display area and that of the second sub-display area respectively; wherein the image data of the first sub-display area and that of the second sub-display area are transmitted respectively from an image data source device to the image data display device according to the refreshing rate of the image data of the first sub-display area and that of the second sub-display area respectively; and wherein the refreshing rate of the image data of the second sub-display area is lower than the refreshing rate of the image data of the first sub-display area; and the image data source device sends fewer amount of data bits for the second sub-display area by skipping at least a portion of the image data of the second sub-display area in at least one frame.