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    • 4. 发明授权
    • Projector
    • 投影机
    • US06530665B2
    • 2003-03-11
    • US09375358
    • 1999-08-17
    • Takeshi TakizawaMutsuya Furuhata
    • Takeshi TakizawaMutsuya Furuhata
    • G03B2114
    • G03B21/006
    • A projector prevents deterioration in optical characteristics of liquid crystal panels caused by heat generated by polarizers, and sticking of dirt onto the light-outgoing surface of the liquid crystal panels. Polarizers are disposed adjacent to the light-outgoing surfaces of liquid crystal panels, while other polarizers are disposed adjacent to the light-incoming surfaces of the liquid crystal panels. The liquid crystal panels and the two polarizers disposed adjacent to the light-incoming and light-outgoing surface of their corresponding liquid crystal panels, are supported by dust protection members. The area between the light-incoming surface of each liquid crystal panel and its associated polarizer disposed adjacent to the light-incoming surface, and the area between the light-outgoing surface of each liquid crystal panel and its associated polarizer disposed adjacent to the light-outgoing surface thereof are cut off from the outside by the dust protection member associated thereto. By virtue of this structure, it is possible to prevent deterioration in the optical characteristics of each liquid crystal panel, and to prevent dirt from sticking onto the light-outgoing surface of each light valve. Therefore, a high quality image with excellent contrast can be projected.
    • 投影仪防止由偏振器产生的热量导致的液晶面板的光学特性的劣化,以及污物粘附在液晶面板的出光面上。 偏振器配置在液晶面板的光出射面附近,而其它的偏振器则靠近液晶面板的光入射面设置。 配置在相应的液晶面板的光入射面和光出射面附近的液晶面板和两个偏振片由防尘部件支承。 每个液晶面板的光入射面与其与光入射面相邻设置的相关偏光板之间的面积,以及每个液晶面板的光出射面与其相邻的偏振片之间的面积, 其外表面由与其相关联的防尘构件从外部切断。 通过这种结构,可以防止每个液晶面板的光学特性的劣化,并且防止污物粘附到每个光阀的出光表面上。 因此,可以预测出具有优异对比度的高质量图像。