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    • 3. 发明申请
    • LIQUID CRYSTAL DISPLAY
    • 液晶显示器
    • US20100315582A1
    • 2010-12-16
    • US12818843
    • 2010-06-18
    • Kyeong-Hyeon KIMJung-Uk SHIMSeung-Beom PARKJang-Kun SONG
    • Kyeong-Hyeon KIMJung-Uk SHIMSeung-Beom PARKJang-Kun SONG
    • G02F1/1343
    • G02F1/134363G02F2001/133742
    • Two electrodes parallel to each other are formed on one of two substrates, homeotropic alignment films are formed on the substrates and a liquid crystal material having positive dielectric anisotropy is injected between the substrates. When a voltage is applied to the two electrodes, a parabolic electric field between the electrodes drives the liquid crystal molecules. Since the generated electric field is symmetrical with respect to the boundary-plane equal distance from each of the two electrodes, the liquid crystal molecules are symmetrically aligned with respect to the boundary-plane, and the optical characteristic is compensated in both regions divided by the boundary-plane, thereby obtaining a wide viewing angle. The electric field does not exert influences on the liquid crystal molecules on the boundary-plane since the electric field on the boundary-plane is parallel to the substrates and perpendicular to the two electrodes; and thus, it is perpendicular to the liquid crystal molecules. Here, the polarization of the light is changed while passing through the liquid crystal layer and as a result, only a part of the light passes through the polarizing plate The transmittance of the light can be varied by controlling the magnitude of voltage applied to the two electrodes. The alignment direction of the liquid crystal molecules is changed in both regions of a bent portion of the electrodes by forming the electrodes in the saw shape in a pixel or in by pixel, and the retardation of the light is compensated, thereby obtaining a wider viewing angle.
    • 在两个基板之一上形成两个彼此平行的电极,在基板上形成垂直取向膜,并且在基板之间注入具有正的介电各向异性的液晶材料。 当对两个电极施加电压时,电极之间的抛物线电场驱动液晶分子。 由于所生成的电场相对于与两个电极中的每一个相等的边界平面等距离对称,所以液晶分子相对于边界面对称地排列,并且光学特性在两个区域中被补偿 从而获得宽视角。 由于边界面上的电场平行于衬底并垂直于两个电极,所以电场不会对边界平面上的液晶分子产生影响; 因此它垂直于液晶分子。 这里,光的偏振通过液晶层而变化,结果只有一部分光通过偏振片。光的透射率可以通过控制施加到两者的电压的大小来改变 电极。 通过以像素或像素形成锯形状的电极,在电极的弯曲部分的两个区域中改变液晶分子的取向方向,并且补偿光的延迟,从而获得更宽的观察 角度。
    • 9. 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。
    • 10. 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%。