Patent ID: 7876409
Filing Date: 2011-01-25
Classification: G02F

Abstract:
1. A liquid crystal display element, comprising: a pair of substrates on whose opposing surfaces alignment films are formed, respectively; and a material layer having dielectric anisotropy, the material layer being sandwiched between said pair of substrates, wherein only one of the alignment films is rubbed so that a liquid crystal material has pre-tilt angles, the material layer with the dielectric anisotropy includes a chiral material and the liquid crystal material with a nematic liquid crystalline phase, 0.25≦d/p≦0.50 being satisfied assuming that the thickness of the material layer is d and a chiral pitch length of the liquid crystal material is p, 1000×d/p≦Δn×d is satisfied assuming that refractive index anisotropy of the liquid crystal material is Δn, in a display area, a range of dispersion of the pre-tilt angles of the liquid crystal material falls within ±3° of a median of the pre-tilt angles, wherein at least one of said substrates is an active matrix substrate comprising source lines, gate lines, and/or both of source lines and gate lines, and wherein an absolute value of difference between the pre-tilt angle of the liquid crystal material around any of the source and gate lines and the median of the pre-tilt angles, which is approximately 87 degrees, of the liquid crystal material in the display area is less than 0.5 degrees.