Image transmitter and image receiver, for transmitting/receiving image data to/from a device connected by a signal data line

摘要

A system LSI serving as an image transmitter is a device for transmitting image data to a display device LCD connected by a data signal line. The system LSI comprises: an output image memory for storing the image data to be transmitted; a subtraction processing unit for reading the image data from the output image memory and obtaining the data of the difference between mutually adjacent pixels of the image data; and a data transmission unit for sequentially outputting a data signal, which expresses the difference data corresponding to the pixels as a binary number, to the data signal line in accordance with the arrangement of the pixels; wherein the data signal of the difference data in which the number of signal changes is reduced more than the case of outputting the pixel data to the data signal line is output.