Patent ID: 7229005

Claim:
A display device comprising: a substrate; a plurality of pixels arranged in a matrix array and formed on said substrate; a selector circuit for selecting one from a plurality of rows of pixels in said matrix array; and a video signal supplying circuit for supplying a video signal to each of pixels in said selected row in synchronism with said selection of said selected row, said video signal supplying circuit comprising: a digital data store section for storing n-bit data information for each of said plurality of pixels, n being an integer equal to or greater than 3; a transfer-data processing section for generating a data signal at a time assigned to one of a plurality of gray scale levels represented by said n-bit data information, in accordance with an output from said digital data store section, in synchronism with n kinds of clocks supplied to said transfer-data processing section, said n kinds being equal in number to the number of bits representing said n-bit data information, n being an integer equal to or greater than 3; a gray-scale voltage generator for generating a plurality of gray scale voltages corresponding to said plurality of gray scale levels, respectively; a selection gate circuit for successively generating a plurality of gate pulses associated with said plurality of gray-scale voltages, respectively, in synchronism with a fastest kind of said n kinds of clocks; and a gray-scale voltage selector circuit section comprised of TFTs (Thin Film Transistors) formed on said substrate for receiving said data signal via one or more selection-data transfer lines smaller in number than 2 n formed on said substrate corresponding to each of a plurality of columns of pixels in said matrix array, and for successively selecting said plurality of gray-scale voltages generated by said gray-scale voltage generator, in synchronism with said gate pulses, n being an integer equal to or greater than 3, wherein said gray-scale voltage selector circuit section outputs as said video signal, one of said plurality of gray-scale voltages selected from said successively selected gray-scale voltages in synchronism with said data signal.