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    • 1. 发明申请
    • BISTABLE TWISTED NEMATIC (BTN) LIQUID CRYSTAL DISPLAY DEVICE
    • BISTABLE TWISTED NEMATIC(BTN)液晶显示装置
    • WO2006111537A1
    • 2006-10-26
    • PCT/EP2006/061652
    • 2006-04-19
    • NEMOPTICJOUBERT, CécileZENATI, ZacchariaSCHEFFER, Terry
    • JOUBERT, CécileZENATI, ZacchariaSCHEFFER, Terry
    • G02F1/139
    • G02F1/1391G02F1/13363
    • The application relates to a bistable twisted nematic (BTN) liquid crystal display device comprising a liquid crystal layer (150) of thickness d, birefringence n and retardation nd, said liquid crystal layer being situated between two substrates (120, 180) and between first and second polarizers (100, 200), said liquid crystal layer (150) in the absence of an applied electric field having two stable or metastable, uniformly twisted textures, and at least one compensation layer (110, 190) being composed of at least one birefringent film, said birefringent film having an optical anisotropy defined by three characteristic refractive indices nx, ny, nz along three corresponding axis x, y, z of index ellipsoid, x and y being situated inside the substrates plane, nx and ny being called in plane indices, with nx> ny, x being called slow axis, and z being perpendicular to the substrates plane, with biaxiality parameter Nz equal to (nx-nz)/(nx-ny), characterized in that Nz lies between - ∞ and 1 so that under oblique viewing the retardation of the stable or metastable texture corresponding to the dark state is compensated to improve the contrast ratio and simultaneously the retardation of the stable or metastable texture corresponding to the bright state is modified to decrease the color shift.
    • 本申请涉及一种双稳态扭曲向列(BTN)液晶显示装置,其包括厚度d,双折射n和延迟量nd的液晶层(150),所述液晶层位于两个基板(120,180)之间,并位于第一 和第二偏振器(100,200),所述液晶层(150)在没有施加电场的情况下具有两个稳定或亚稳定均匀扭转的纹理,以及至少一个补偿层(110,190)至少由 一个双折射膜,所述双折射膜具有由三个特征折射率nx,ny,nz定义的光学各向异性,沿着三个对应的轴线x,y,z,索引椭圆体,x和y位于衬底平面内,nx和ny被称为 在平面索引中,nx> ny,x称为慢轴,z垂直于基板平面,双轴参数Nz等于(nx-nz)/(nx-ny),其特征在于Nz在-8 和 1,使得在倾斜观察下,补偿对应于暗态的稳定或亚稳态纹理的延迟以改善对比度,并且同时改变对应于亮状态的稳定或亚稳态纹理的延迟以减少色移。
    • 2. 发明申请
    • A SINGLE-POLARIZER REFLECTIVE BISTABLE TWISTED NEMATIC (BTN) LIQUID CRYSTAL DISPLAY DEVICE
    • 单极化反射双折叠(BTN)液晶显示装置
    • WO2006122899A1
    • 2006-11-23
    • PCT/EP2006/062203
    • 2006-05-10
    • NEMOPTICJOUBERT, CécileSCHEFFER, Terry
    • JOUBERT, CécileSCHEFFER, Terry
    • G02F1/13363G02F1/139G02F1/1335
    • G02F1/1391G02F1/133634G02F2001/133531G02F2001/133567
    • The application relates to a single-polarizer reflective bistable twisted nematic (BTN) liquid crystal display device comprising a liquid crystal layer (150) of thickness d, birefringence Δn and retardation Δnd, said liquid crystal layer being situated between two substrates (120, 180) and between a polarizer (100) and a reflector (200), said liquid crystal layer (150) in the absence of an applied electric field having two stable uniformly twisted textures, the twists of the two stable textures differing by an angle being equal mainly to 180°, and at least one compensation layer (110) positioned between said polarizer (100) and said reflector (200), said compensation layer (110) being composed of at least one birefringent film, said birefringent film having an optical anisotropy defined by three characteristic refractive indices nx, ny, nz, along three corresponding axis x, y, z of index ellipsoid, x and y being situated inside the substrates plane, nx and ny being called in plane indices, with nx ≥ ny, x being called slow axis, and z being perpendicular to the substrates plane (120, 180) with biaxiality parameter Nz equal to (nx- nz)/(nx-ny), characterized in that Nz lies between - ∞ and ½ so that under oblique viewing the retardation of the stable texture corresponding to the dark state is compensated to improve the contrast ratio and simultaneously the retardation of the stable texture corresponding to the bright state is modified to decrease the color shift.
    • 本申请涉及一种单偏振器反射双稳态扭曲向列(BTN)液晶显示装置,其包括厚度d,双折射Δn和相位差Δnd的液晶层(150),所述液晶层位于两个基板(120 ,180)和偏振器(100)和反射器(200)之间,所述液晶层(150)在没有施加电场的情况下具有两个稳定均匀扭曲的纹理,两个稳定纹理的扭曲相差一个角度 主要与180°相等,以及至少一个位于所述偏振器(100)和所述反射器(200)之间的补偿层(110),所述补偿层(110)由至少一个双折射膜构成,所述双折射膜具有 光学各向异性由三个特征折射率nx,ny,nz沿着索引椭圆体的三个对应轴x,y,z定义,x和y位于衬底平面内,nx和ny被称为平面ind 其中nx = ny,x称为慢轴,z与双轴性参数Nz等于(nx-nz)/(nx-ny)垂直于衬底平面(120,180),其特征在于Nz位于 -8和1/2,使得在倾斜观察下,补偿对应于暗态的稳定纹理的延迟以改善对比度,并且同时修改对应于亮状态的稳定纹理的延迟以减少色偏。