公开(公告)号：US20090213312A1

公开(公告)日：2009-08-27

申请号：US11920933

申请日：2006-05-10

Applicant: Cecile Joubert ,  Terry Scheffer

Inventor： Cecile Joubert ,  Terry Scheffer

IPC: G02F1/13363 ,  G02F1/13

CPC classification number: G02F1/1391 ,  G02F1/133634 ,  G02F2001/133531 ,  G02F2001/133567

Abstract: The application relates to a single-polarizer reflective bistable twisted nematic (BTN) liquid crystal display device comprising a liquid crystal layer of thickness d, birefringence Δn and retardation Δnd, said liquid crystal layer being situated between two substrates and between a polarizer and a reflector, said liquid crystal layer 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 positioned between said polarizer and said reflector, said compensation layer 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 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.

Abstract translation: 本申请涉及一种单偏振器反射双稳向扭曲向列（BTN）液晶显示装置，其包括厚度d，双折射Deltan和延迟Deltand的液晶层，所述液晶层位于两个基板之间以及偏振器和反射器 所述液晶层在不存在具有两个稳定均匀扭曲纹理的施加电场的情况下，所述两个稳定纹理的扭曲角度主要等于180°，并且至少一个补偿层位于所述偏振器和所述 所述补偿层由至少一个双折射膜构成，所述双折射膜具有由三个特征折射率nx，ny，nz沿着索引椭圆体的三个对应轴x，y，z定义的光学各向异性，x和y为 位于衬底平面内，nx和ny被称为平面指数，其中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-∞和½之间，使得在倾斜观察下，对应于暗态的稳定纹理的延迟 被补偿以提高对比度，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。

公开(公告)号：US08085370B2

公开(公告)日：2011-12-27

申请号：US11920933

申请日：2006-05-10

Applicant: Cécile Joubert ,  Terry Scheffer

Inventor： Cécile Joubert ,  Terry Scheffer

IPC: G02F1/1335

CPC classification number: G02F1/1391 ,  G02F1/133634 ,  G02F2001/133531 ,  G02F2001/133567

Abstract: The application relates to a single-polarizer reflective bistable twisted nematic (BTN) liquid crystal display device comprising a liquid crystal layer of thickness d, birefringence Δn and retardation Δnd, said liquid crystal layer being situated between two substrates and between a polarizer and a reflector, said liquid crystal layer 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 positioned between said polarizer and said reflector, said compensation layer 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 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.

Abstract translation: 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＆Dgr; n和延迟＆Dgr的液晶层，所述液晶层位于两个基板之间， 偏振器和反射器，所述液晶层在不存在具有两个稳定均匀扭曲纹理的施加电场的情况下，两个稳定纹理的扭曲主要与180°相等，并且至少一个补偿层位于 所述偏振器和所述反射器，所述补偿层由至少一个双折射膜组成，所述双折射膜具有由三个特征折射率nx，ny，nz沿着三个对应轴的指数椭圆体的轴线x，y，z限定的光学各向异性， x和y位于衬底平面内，nx和ny称为平面指数，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-∞和½之间，使得在倾斜观察下，对应于暗态的稳定纹理的延迟 被补偿以提高对比度，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。

公开(公告)号：US20080239458A1

公开(公告)日：2008-10-02

申请号：US11569498

申请日：2005-05-24

Applicant: Jonathan A. Sachs ,  Howard V. Goetz ,  David Keith ,  Lin Li ,  Steven H. Linn ,  Alexander Parfenov ,  Stephen E. Brice ,  Terry Scheffer ,  James A. Van Vechten ,  Jiuzhi Xue

Inventor： Jonathan A. Sachs ,  Howard V. Goetz ,  David Keith ,  Lin Li ,  Steven H. Linn ,  Alexander Parfenov ,  Stephen E. Brice ,  Terry Scheffer ,  James A. Van Vechten ,  Jiuzhi Xue

IPC: G02B26/00

CPC classification number: G02F1/1354 ,  G02B27/1026 ,  G02B27/1046 ,  G02B27/145 ,  G02B27/149 ,  G02F2203/01 ,  H04N9/3105

Abstract: An optically addressed, photoconductive spatial light modulator (SLM) operates in a transmissive mode and is capable of modulating a wide spectrum of visible light. There is no pixel structure or native pixel resolution in the SLM. The SLM has no photodiodes and does not rectify. A light projection system (100) in which one or more SLMs (128, 130, 132) are placed includes a write (image definition) UV light path (102) and a read (illumination) visible light path (104) to form a color image projection display. The write UV light propagates from an image display pattern source (120) and either sequentially or continuously writes image patterns on the photoconductive SLMs. The read visible light propagates through the SLM and is modulated by an electro-optical material, the optical properties of which change in response to the image structure carried by the write light. The result is a high efficiency display system that delivers high resolution color images through a projection lens (190) onto a display screen.

Abstract translation: 光学寻址的光导空间光调制器（SLM）以透射模式工作，并且能够调制宽范围的可见光。 在SLM中没有像素结构或本机像素分辨率。 SLM没有光电二极管，不能纠正。 其中放置一个或多个SLM（128,130,132）的光投射系统（100）包括写入（图像清晰）UV光路（102）和读取（照明）可见光路径（104），以形成 彩色图像投影显示。 写入UV光从图像显示图案源（120）传播，并且顺序地或连续地将图像图案写在光电导SLM上。 读取的可见光通过SLM传播并被电光材料调制，电光材料的光学特性响应于由写入光携带的图像结构而改变。 结果是高效率显示系统，其通过投影透镜（190）将高分辨率彩色图像传送到显示屏上。