Patent ID: 7701472

Claim:
A display controller that is connected to a host and supplies image data to a display driver for driving a display panel, comprising: an image data input interface to which first image data are input; a first image processing section that carries out a first processing operation that includes at least either of a turning image operation and a mirror image reversing operation, the first image processing section outputting second image data based on the first image data; a second image processing section that carries out a second processing operation that includes at least either of a turning image operation and a mirror image reversing operation, the second image processing section outputting fourth image data based on the first image data; an image data compressing section that compresses the second image data and outputs third image data; a memory where the third image data is stored; a host interface to/from which the third imaged data stored in the memory is input and output; a display driver interface that outputs the fourth image data to the display driver, the first image processing section and the second image processing section carrying out the first processing operation and the second processing operation on the first image data of an identical frame input through the image data input interface; a first image size reducing section and a second image size reducing section to create image data reduced in size with a first reduction ratio and a second reduction ratio, respectively, from the first image data input through the image data input interface, the first image processing section carrying out the first processing operation for the image data created by the first image size reducing section, the second image processing section carrying out the second processing operation for the image data created by the second image size reducing section, and the first image size reducing section and the second image size reducing section creating the image data reduced in size with the first reduction ratio and the second reduction ratio, respectively, for the image size of identical image data.