Patent ID: 6525795
Filing Date: 2003-02-25
Classification: G02F

Abstract:
An active matrix type liquid crystal display device comprising:first and second substrates; at least a signal electrode and a scanning electrode being formed over the first substrate for defining at least a pixel in a matrix form; at least a thin film transistor being formed over the first substrate for the pixel, said thin film transistor having an active region comprising crystalline silicon; an opposite electrode being formed over said second substrate; a liquid crystal layer being interposed between the first and second substrates, said liquid crystal layer comprising at least a material having at least one selected from the group consisting of a ferroelectricity and an antiferroelectricity; and at least an orientation layer in contact with said liquid crystal layer, wherein the liquid crystal display device is operated in a digital gradation, wherein the orientation layer has a surface tension in a range of 11 to 15 dyne/cm, wherein molecules of the liquid crystal layer has a pretilt angle within a range of 1.6Â° to 3.1Â°.