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公开(公告)号：US5729242A
公开(公告)日：1998-03-17
申请号：US646576
申请日：1996-05-08
CPC分类号： G02B27/0101 , G02B27/01 , G02B2027/0118 , G02B2027/012
摘要： An optical system is provided that produces bright, high contrast head-up display images which are not adversely affected by the direct exposure to sunlight of the system's virtual image source. The optical system comprises a light source system which projects a focused light beam to a segmented, electronically-addressed polymer-dispersed liquid crystal ("PDLC")-type film, which serves as a primary image source. Selected segments of the image source are made transmissive while other selected segments scatter light. Accordingly, the portions of the focused light beam incident to transmissive segments are transmitted to form a real image, while the balance of the focused light beam is scattered. A stray light-blocking means, such as a lens/aperture combination, is employed to block the scattered light. The real image is projected onto an unsegmented, electronically-addressed PDLC-type film serving as an image screen. The image screen is the head-up display image source and replaces other emissive light sources in conventional head-up displays. The PDLC-type image screen is unsegmented so that there are no display elements to provide false information upon exposure to sunlight. Moreover, the image screen is highly forward scattering, so that stray sunlight incident to the image screen is forward scattered in the direction opposite to the image source, thereby preventing the reflection of sunlight into viewers' eyes. The light transmitted through the PDLC-type image screen comprises the head-up display image, which is then projected by a projection means, such as a concave mirror or lens, to the desired location for viewing as a virtual image.
摘要翻译： 提供了一种产生明亮，高对比度的平视显示图像的光学系统，其不会受到直接暴露于系统虚拟图像源的阳光的不利影响。 光学系统包括将聚焦光束投射到用作主要图像源的分段电子寻址聚合物分散液晶（“PDLC”）型膜的光源系统。 图像源的所选段被制成透射性，而其它选定的片段散射光。 因此，入射到透射段的聚焦光束的部分被透射以形成实像，而聚焦光束的平衡是散射的。 使用诸如透镜/光圈组合的杂散光阻挡装置来阻挡散射光。 将真实图像投影到用作图像屏幕的未分段电子寻址PDLC型胶片上。 图像屏幕是平视显示图像源，并替代传统平视显示器中的其他发射光源。 PDLC型图像屏幕是未分段的，因此没有显示元件在暴露在阳光下时提供虚假信息。 此外，图像屏幕是高度向前的散射，使得入射到图像屏幕的杂散的阳光在与图像源相反的方向上向前散射，从而防止阳光反射到观察者的眼睛中。 通过PDLC型图像屏幕传输的光包括平视显示图像，然后通过诸如凹面镜或透镜的投影装置将其投影到期望的位置，以便作为虚拟图像观看。
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公开(公告)号：US5760852A
公开(公告)日：1998-06-02
申请号：US552412
申请日：1995-11-03
申请人： Shin-Tson Wu , Chiung-Sheng Wu , Khoon-Cheng Lim , Tsung-Yuan Hsu
发明人： Shin-Tson Wu , Chiung-Sheng Wu , Khoon-Cheng Lim , Tsung-Yuan Hsu
IPC分类号： A61F9/02 , G02B6/06 , G02F1/1335 , G02C7/10
摘要： An imaging system that can tolerate high intensity optical beams without a reduction in the system's field-of-view, comprises an imager, a fiber array positioned at the image plane of the imager, a sensor array positioned at the output end of the fiber array, a panel display positioned in proximity of the fiber array and an image processor for electronically processing the information from the sensor array.
摘要翻译： 可以容忍高强度光束而不降低系统视野的成像系统包括成像器，位于成像器的图像平面处的光纤阵列，位于光纤阵列输出端的传感器阵列 位于光纤阵列附近的面板显示器和用于电子处理来自传感器阵列的信息的图像处理器。
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公开(公告)号：US5537242A
公开(公告)日：1996-07-16
申请号：US194759
申请日：1994-02-10
申请人： Khoon-Cheng Lim
发明人： Khoon-Cheng Lim
摘要： Low-cost, thin-layer liquid crystal (LC) millimeter wave (MMW) phase modulators and phased array antennae are provided based on several types of open transmission strip-line, parallel-line, and ridge-guide configurations in which surface-aligned LCs are modulated reversibly with small applied electrical fields. Incorporated properly in the open transmission lines, the LC layer can modulate the propagating MMW with nearly its full value of birefringence. The modulator comprises: (a) at least one transmission line supported on a first substrate; (b) a dielectric medium comprising a liquid crystal or a liquid crystal composite and contacting the substrate and the transmission line(s), the liquid crystal or a liquid crystal composite (e.g., polymer-dispersed liquid crystal; PDLC) having an electrically controllable dielectric permittivity; (c) a second substrate disposed opposite the first substrate and separated therefrom by a distance to accommodate the LC or LC composite; (d) means for sealing the LC or LC composite between the two substrates; (e) a source of millimeter waves electrically connected to the transmission line(s) for transmission therealong; and (f) means for varying the dielectric permittivity of the LC or LC composite to thereby modulate the transmission.
摘要翻译： 基于几种类型的开放式传输带状线，平行线和脊导向配置，提供低成本，薄层液晶（LC）毫米波（MMW）相位调制器和相控阵天线，其中表面对准 LCs被小的应用电场可逆地调制。 适当地结合在开放传输线中，LC层可以以几乎全部的双折射值来调制传播的MMW。 调制器包括：（a）支撑在第一基板上的至少一个传输线; （b）包含液晶或液晶复合材料的介质介质，并与基板和传输线接触，液晶或液晶复合材料（例如聚合物分散液晶; PDLC）具有电可控制 介电常数; （c）第二衬底，与第一衬底相对设置并与其分离一定距离以容纳LC或LC复合材料; （d）用于在两个基板之间密封LC或LC复合材料的装置; （e）电连接到传输线的毫米波源，用于沿其传输; 和（f）用于改变LC或LC复合材料的介电常数的装置，从而调制透射。
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