Display controller for a flat display apparatus

Claim 1

A display controller having a timing signal generating circuit for generating various timing signals utilized in the display controller, a display address generating circuit for sequentially outputting a display address, a display memory which stores pixel display data and read out the pixel display data in response to a display address provided by the display address generating circuit, a data width converting circuit which converts the pixel display data read out of said display memory into an input format of a parallel lookup table, a parallel look up table which converts said pixel display data reads out of said data width converting circuit into data indicating color corresponding to each pixel delivered to a display device, a display interface circuit for outputting image data composed of a plurality of pixels read out of said parallel lookup table in synchronous with an input timing of said display device, and a flat panel display for displaying said image data composed of said plurality of pixels read out of said display interface circuit, wherein said parallel lookup table includes memory means of n in number (where n is an integer greater than one) for storing information indicating a color of said pixel; and selection means of m number (where m is an integer greater than one) for independently receiving n pieces of information indicating color of the pixels stored in said n memory means and delivering information indicating color of pixel m in number simultaneously by each selecting one from said n pieces of information indicating color of pixel, a selecting means for inputting n pieces of information indicating color of pixel stored in said n memory means and selectively outputting information indicating color of pixel stored in said memory means in response to read access from a predetermined processor for carrying out system control or said display control system; and writing means, responsive to a write access from said processor, for writing information indicating color of pixel reads out of said processor into said memory means.