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    • 8. 发明授权
    • Liquid crystal display devices having wide viewing angle and improved contrast ratio
    • 液晶显示装置具有宽视角和改善的对比度
    • US06943858B2
    • 2005-09-13
    • US10655516
    • 2003-09-04
    • Jae-Jin LyuHea-Ri LeeKyeong-Hyeon KimJian-Min Chen
    • Jae-Jin LyuHea-Ri LeeKyeong-Hyeon KimJian-Min Chen
    • G02F1/13G02F1/1335G02F1/13363G02F1/139C09K19/02G02F1/1337
    • G02F1/13363G02F1/133634G02F1/1337G02F1/1393G02F1/1396G02F2001/133742G02F2001/13712
    • Liquid crystal display devices include a vertically aligned liquid crystal cell having first and second surfaces that extend opposite each other and contain a liquid crystal material therein having negative dielectric anisotropy. First and second polarizers are attached to the first and second surfaces of the liquid crystal cell, respectively. A first a-plate compensation film and a first c-plate compensation film are provided. These films are disposed between the first surface of the liquid crystal cell and the first polarizer. The direction having a largest refractive index in the first a-plate compensation film is parallel to or perpendicular to a polarizing direction of the first polarizer. Moreover, a difference between a summation of a retardation (nx21−nza1)×da1 of the first a-plate compensation film, a retardation (nxc1−nzc1)×dc1 of the first c-plate compensation film and a retardation of the first and the second polarizers and a retardation due to birefringence of the liquid crystal cell is equal to or less than 15% of the retardation value due to birefringence of the liquid crystal cell.
    • 液晶显示装置包括具有第一和第二表面的垂直取向的液晶单元,第一和第二表面彼此相对延伸并且包含其中具有负介电各向异性的液晶材料。 第一和第二偏振器分别附着到液晶单元的第一和第二表面。 提供了第一平板补偿膜和第一c板补偿膜。 这些膜设置在液晶单元的第一表面和第一偏振器之间。 在第一平板补偿膜中具有最大折射率的方向平行于或垂直于第一偏振器的偏振方向。 此外,第一平板补偿膜的延迟(n×x2 -n×za1×)×d1a1 / s2的和的和 第一c板补偿膜的延迟(n×x1 -n×z1×1)×d×c1 和第一和第二偏振器的延迟和 由于液晶单元的双折射引起的延迟等于或小于由于液晶单元的双折射引起的延迟值的15%。