Patent ID: 7193594
Filing Date: 2007-03-20
Classification: G09G

Abstract:
1. A display device comprising: a plurality of pixels disposed in matrix over a substrate; an active matrix circuit comprising a plurality of pixels TFT over said substrate, each of said pixel comprising at least first and second thin film transistors and a pixel electrode wherein a gate electrode of the first thin film transistor is electrically connected to a gate line and a gate electrode of the second thin film transistor is electrically connected to a drain region of the film thin transistor, and the pixel electrode is electrically connected to one of source and drain regions of the second thin film transistor; a source driver and a gate driver which drive said active matrix circuit over said substrate; and a circuit which converts m bit digital video data inputted from an external into n bit digital video data and provides said n bit digital video data to said source driver, where said m and said n are integers equal to or larger than 2 and satisfy m>n, wherein said circuit is formed over substrate; wherein each step of a voltage level for said voltage gray scale method is designated as (VH−VL)2n, where VH is the highest voltage level of voltages inputted to DA converter circuit, and VL is the lowest level of voltage inputted to said D/A converter circuit.