Patent ID: 8659609

Claim:
A multi-color display device comprising: compression means comprising a plurality of compression circuits, each of which is configured to receive an input signal and to convert the input signal into compressed data including approximated color signals different from each other and a selection signal, the number of the approximated color signals being less than the number of pixels constituting a block, and the selection signal being used to select one of the approximated color signals for each one of the pixels constituting the block, each of the pixels being comprised of sub-pixels having N types of color wherein N is larger than 3), wherein: each of the plurality of compression circuits is configured to divide color signals included in the input signal into groups, said groups being grouped according to N-dimensional space having coordinate axes representing arbitrary colors, and to generate the approximated color signals corresponding to each of the groups, and the structure of the compressed data of each of the plurality of compression circuits are substantially constant and are processed by a common decompression process, the plurality of compression circuits are configured to generate the approximated color signals from the input signal by using respective methods different from each other, and the compression means further includes: means for selecting any one of the plurality of compression circuits; and a switch for selecting the compression circuit selected by the selection means, wherein a signal to be output from a target pixel is corrected by using the selection signal included in the compressed data, and further comprising means for outputting signals from each of the sub-pixels of the target pixel and controlling contrast for each of the sub-pixels, by comparing a selection signal for the target pixel with a selection signal for a pixel adjacent to the target pixel.