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    • 2. 发明授权
    • Light diffusive sheet
    • 光漫射片
    • US06963451B2
    • 2005-11-08
    • US10474806
    • 2002-06-21
    • Koichi SeYutaka Omura
    • Koichi SeYutaka Omura
    • G02B5/02F21V7/04
    • G02B5/0221G02B5/0268G02B5/0278
    • The invention provides a sheet (1) comprising a light-transmittable resin, in which irregularities are formed on both sides (1a) and (1b) of the sheet, the average surface roughness of one side (1a) which becomes the light-entering side is from 0.2 to 5.0 μm and larger than the average surface roughness of the opposite side (1b) that becomes the light-departing side, wherein the average surface roughness of the opposite side (1b) is from 0.2 to 2.0 μm, and the surface area ratio of the one side (1a) is smaller than the surface area ratio of the opposite side (1b).
    • 本发明提供了一种片材(1),其包括可透光树脂,其中在片材的两侧(1a)和(1b)上形成凹凸,其中一侧(1a)的平均表面粗糙度成为 光进入侧为0.2〜5.0μm,大于成为脱光侧的相反侧(1b)的平均表面粗糙度,其中相对侧(1b)的平均表面粗糙度为0.2〜 2.0μm,一侧(1a)的表面积比小于相对面(1b)的表面积比。