Patent ID: 6930739
Filing Date: 2005-08-16
Classification: G02F

Abstract:
1. A liquid crystal display, comprising: two substrates facing each other with a predetermined gap therebetween; an electrode formed on each surface of the two substrates facing each other; vertical alignment films formed on the electrodes; liquid crystals having negative dielectric anisotropy sealed in the gap; a singular point control portion for performing control such that a singular point of a director of the liquid crystals is formed in a predetermined position above or below said portion when a voltage is applied between the electrodes; and two polarizers whose polarizing axes are orthogonal to each other provided on an outer surface of each of the two substrates, wherein the singular point control portion forms the singular point when a voltage is applied so as to increase the ratio of the area of a liquid crystal domain in which the direction of longitudinal axes of molecules of the liquid crystals in the vicinity of the singular point control portion is substantially at an angle of 45 deg. to the polarizing axes of the polarizers as viewed in the normal direction of the surfaces of the substrates, wherein the singular point control portion forms a first singular point where the longitudinal axes of the liquid crystal molecules are directed toward substantially the same point and a second singular point where a part of the liquid crystal molecules are directed in a different direction adjacent to each other and controls the alignment of the liquid crystals such that the longitudinal axes of the liquid crystal molecules in liquid crystal domains located adjacent to each other on both sides of an imaginary straight line connecting the adjacent first and second singular points are substantially at 45 deg. to the imaginary straight line when a voltage is applied, and wherein one dark line is formed substantially along the imaginary straight line between a plurality of the singular point control portions when a voltage is applied.