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    • 1. 发明申请
    • LIGHT GUIDE FOR USE WITH BACKLIT DISPLAY
    • 背光显示使用指南
    • WO2003016784A1
    • 2003-02-27
    • PCT/US2002/019615
    • 2002-06-20
    • 3M INNOVATIVE PROPERTIES COMPANY
    • WHITNEY, Leland, R.BOYD, Gary, T.KOTCHICK, Keith, M.EPSTEIN, Kenneth, A.COBB, Sanford, Jr.,WATSON, Philip, E.LAMB, David, J.GARDINER, Mark, E.
    • F21V8/00
    • G02B6/0038G02B6/0046G02B6/0065Y10S385/901
    • A light guide (14) including a light guide body having a light re-directing side (22) positioned opposite from a light output side (20). A plurality of elongate prisms are located adjacent the light output side of the light guide body. The prisms extend side-by-side relative to one another along lengths. The prisms include upper edges defining heights of the prisms. The upper edges extend along the lengths of the prisms. Each upper edge includes a plurality of edge segments having different magnitudes of slope. The light guide (14) also includes a plurality of light extraction structures located adjacent the light re-directing side (22) of the light guide body for reflecting light toward the light output side (20). The light extraction structures include elongated projections (50) each having a plateau segment (54) and first and second facets (56, 58). The elongated projections (50) are separated by lands (52) that are recessed relative to the plateau segments (54). The first and second facets (56, 58) extend from the plateau segments (54) to the lands (52).
    • 一种导光体(14),包括具有与光输出侧(20)相对定位的光重新定向侧(22)的导光体。 多个细长棱镜位于导光体的光输出侧附近。 棱镜沿着长度相对于彼此并排延伸。 棱镜包括限定棱镜高度的上边缘。 上边缘沿着棱镜的长度延伸。 每个上边缘包括具有不同幅度的斜率的多个边缘段。 导光体(14)还包括多个光导提取结构,其位于导光体的光重导侧(22)附近,用于向光输出侧(20)反射光。 光提取结构包括每个具有平台段(54)和第一和第二小平面(56,58)的细长突起(50)。 细长突起(50)由相对于平台段(54)凹陷的平台(52)分开。 第一和第二小面(56,58)从平台段(54)延伸到平台(52)。