| 摘要 |
PURPOSE:To provide the liquid crystal display element of a high grade display which improves the visual angle characteristic of a TN type liquid crystal display element when used for this element and has excellent visibility. CONSTITUTION:This optical compensation sheet is a crystallooptically biaxial optically anisotropic element varying in all of the three refractive indices nx, ny, nz (Kz denotes the refractive index most approximate to a thickness direction) in the main axis direction. The angle formed by the direction of nz and the direction perpendicular to the sheet is defined as thetaz and the angle formed by the optical axis nearer the direction perpendicular to the sheet of the two optical axes and the direction perpendicular to the sheet as thetaopt. The thetaz is then 0 deg. to 40 deg. and the thetaopt is 0 deg. to 20 deg.. |
