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    • 3. 发明授权
    • Color liquid crystal projection display systems
    • 彩色液晶投影显示系统
    • US5757341A
    • 1998-05-26
    • US540516
    • 1995-10-10
    • John A. ClarkeAllan CarmichaelMartinus V.C. Stroomer
    • John A. ClarkeAllan CarmichaelMartinus V.C. Stroomer
    • G02F1/13G02F1/13357G03B21/00G09F9/00H04N9/31G09G3/36
    • G02F1/133621H04N9/3108G02F2001/133623
    • In a color liquid crystal projection display in which three differently-colored illuminating beams (R,G,B) are incident from mutually different directions on an LC panel (20) having an array of display elements (40) with a microlens array (21) at the input side of the panel end of whose elements (42) overlies a respective group of three adjacent display elements in row or delta configuration and through each of which light of the three colours (R,G,B) is directed at different angles respectively and converged towards respective ones of the display elements in its associated group, a deflecting element array (25), comprising, for example, microlens element (44) or microprisms (46) formed in a glass substrate of the panel, is positioned close to the plane of the display elements to deflect the directions of light of at least two of the three colours from each microlens element (42) to bring the directions of light of the three colours at the output side of the panel towards a common direction, and preferably substantially parallel to one another. A significant reduction in the amount of spread of light if the output side is thereby achieved, such that, inter alia, a comparatively small aperture projection lens (30) can be used.
    • 在具有微透镜阵列(21)的具有显示元件(40)阵列的LC面板(20)上从三个不同颜色的照明光束(R,G,B)从不同方向入射的彩色液晶投影显示器中, )在其元件(42)的面板端的输入侧上以行或三角形配置覆盖相应的三个相邻显示元件组,并且通过其中三种颜色(R,G,B)的光指向不同的 角度分别朝向相关联的组中的各个显示元件会聚,偏转元件阵列(25)包括例如形成在面板的玻璃基板中的微透镜元件(44)或微棱镜(46),被定位 靠近显示元件的平面以使来自每个微透镜元件(42)的三种颜色中的至少两种的光的方向偏转,以使面板的输出侧的三色光的方向朝向共同的方向 并且优选地基本上彼此平行。 如果由此实现输出侧,则光的扩散量的显着减少,使得尤其可以使用相对小的孔径投影透镜(30)。