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    • 2. 发明申请
    • PERFORATED BACKLIGHT
    • 执行背光
    • WO2009100303A1
    • 2009-08-13
    • PCT/US2009/033349
    • 2009-02-06
    • 3M INNOVATIVE PROPERTIES COMPANYFREIER, David G.JOHNSTON, Raymond P.KONG, Steven H.
    • FREIER, David G.JOHNSTON, Raymond P.KONG, Steven H.
    • G02F1/13357G02B6/00F21V8/00
    • G02B6/0096G02B6/003G02B6/0031G02B6/0051G02B6/0055
    • A backlight includes a lower light guide having a specularly reflecting bottom surface and an opposing specularly reflecting perforated mirror film having a plurality of light transmission apertures. The specularly reflecting perforated mirror film has a polymeric multilayer structure, where non-perforated areas of the specularly reflecting perforated mirror film have a light reflectance value of 98% or greater and the specularly reflecting bottom surface has a light reflectance value of 98% or greater. A light collimating injector directs input light into the lower light guide. The light propagating generally parallel to the specularly reflecting perforated mirror film along a horizontal plane. The light collimating injector provides input rays into a vertical plane, the vertical plane being orthogonal to the horizontal plane, and forming an angle having an absolute value of 30 degrees or less with an intersection of the vertical and horizontal planes. An upper light cavity is disposed on the lower light guide. The upper light cavity has a light emission surface and a light input surface. The light input surface is at least partially defined by the specularly reflecting perforated mirror film. The upper light cavity has a thickness defined by the light emission surface and the light input surface. The thickness is equal to or greater than a distance between adjacent light transmission apertures.
    • 背光源包括具有镜面反射底面的下导光体和具有多个透光孔的相对镜面反射多孔镜膜。 镜面反射穿孔镜膜具有聚合物多层结构,其中镜面反射穿孔镜膜的非穿孔区域的光反射率值为98%以上,镜面反射底面的光反射率值为98%以上 。 光准直喷射器将输入光引导到下光导中。 沿着水平面大致平行于镜面反射穿孔镜膜传播的光。 光准直喷射器将输入光线提供到垂直平面中,垂直平面垂直于水平面,并且与垂直和水平面的交点形成具有30度或更小的绝对值的角度。 上部光腔设置在下部光导上。 上部光腔具有发光面和光输入面。 光输入表面至少部分地由镜面反射穿孔镜膜限定。 上部光腔具有由发光表面和光输入表面限定的厚度。 厚度等于或大于相邻光传输孔之间的距离。