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    • 126. 发明授权
    • Light conducting unit, illumination apparatus, and projection type display apparatus
    • 导光单元,照明装置和投影型显示装置
    • US07645042B2
    • 2010-01-12
    • US12153986
    • 2008-05-28
    • Takashi TakedaAkira Hashimoto
    • Takashi TakedaAkira Hashimoto
    • G03B21/26G03B21/28
    • G02B6/00G03B21/208Y10S385/901
    • A light conducting unit is disposed between a light source and a region which is to be illuminated. In addition, a light conducting unit includes a polygonal prism made from a first medium with a first coefficient of refraction, a first light conducting unit which directs light to be incident upon a first surface of the polygonal prism, and a second light conducting unit upon which light emitted from a second surface of the polygonal prism is incident, wherein the polygonal prism includes a reflective device which reflects light which is incident into the polygonal prism from the first surface towards the second surface, and a second medium with a second coefficient of refraction which is less than the first coefficient of refraction is provided at the first surface and the second surface.
    • 导光单元设置在光源和要被照明的区域之间。 此外,导光单元包括由具有第一折射率的第一介质制成的多边形棱镜,引导入射到多棱柱第一表面的光的第一导光单元和第二导光单元, 从多边形棱镜的第二表面发射的光入射,其中多边形棱镜包括将从第一表面入射到多边形棱镜中的光反射到第二表面的反射装置,以及具有第二系数的第二介质 在第一表面和第二表面上设置小于第一折射系数的折射率。