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    • 7. 发明授权
    • Liquid crystal display having improved contrast ratio and color reproduction when viewed in the lateral direction
    • 液晶显示器在横向观察时具有改善的对比度和色彩再现性
    • US06970220B2
    • 2005-11-29
    • US09992474
    • 2001-11-14
    • Seung-Beom ParkKyeong-Hyeon Kim
    • Seung-Beom ParkKyeong-Hyeon Kim
    • G02F1/1337G02F1/133G02F1/1333G02F1/1335G02F1/1343G02F1/139G09G5/10
    • G02F1/133707G02F1/1393G02F2201/121
    • Pluralities of pixel electrodes having openings and thin film transistors are provided on a lower panel, a common electrode having apertures is provided on an upper panel, and a liquid crystal layer vertically aligned to the two panels is located between the lower and the upper panels. The upper and the lower polarizers having the perpendicular polarizing directions are provided on the outer surfaces of the upper and the lower panels, respectively. The voltage value of a first gray representing the darkest state applied between the pixel electrode and the common electrode is within a voltage range giving a contrast ratio to be equal to or higher than 0.8 with respect to contrast ratio when the voltage applied between the pixel electrode and the common electrode is zero. In this way, the contrast ratio and the color reproduction is improved, so that the image quality of a liquid crystal display is improved.
    • 具有开口的多个像素电极和薄膜晶体管设置在下面板上,在上面板上设置有具有孔的公共电极,并且垂直对齐于两个面板的液晶层位于下面板和上部面板之间。 具有垂直偏振方向的上偏振器和下偏振器分别设置在上面板和下面板的外表面上。 表示施加在像素电极和公共电极之间的最暗状态的第一灰度的电压值在施加在像素电极之间的电压时相对于对比度比的给定对比度等于或高于0.8的电压范围内 公共电极为零。 以这种方式,改善了对比度和色彩再现,从而提高了液晶显示器的图像质量。
    • 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%。