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    • 3. 发明授权
    • Light diffusion sheet and backlight unit using the same
    • 光扩散片和使用其的背光单元
    • US06871994B2
    • 2005-03-29
    • US10639979
    • 2003-08-13
    • Kenichi HaradaHitoshi Masaki
    • Kenichi HaradaHitoshi Masaki
    • G02B5/02F21V3/04F21V8/00G02B6/00G02F1/1335G02F1/13357F21V5/00
    • G02B6/0051F21V3/04G02B6/0065
    • A light diffusion sheet comprising a transparent base material sheet; a light diffusion layer laminated on a surface of the base material sheet and containing beads dispersed within a binder; and a sticking-inhibiting layer laminated on a rear face of the base material sheet, wherein the binder of the light diffusion layer contains a thermosetting resin and the sticking-inhibiting layer is a resin layer containing an ionizing radiation curable resin. In the light diffusion sheet of the invention, which employs an ionizing radiation curable resin for the binder of the sticking-inhibiting layer, the cross-linking density of the binder can be increased, whereby the wear resistance of the sticking-inhibiting layer as well as the wear resistance of the rear face of the light diffusion sheet can be increased. Further, possible occurrence of scratches in the sticking-inhibiting layer, which is attributable to the contact between the sticking-inhibiting layer and the beads of the light diffusion layer, can be effectively avoided.
    • 一种光扩散片,包括透明基材片; 光扩散层,层叠在基材片的表面上,并含有分散在粘合剂中的珠粒; 以及层叠在基材片的背面上的粘着抑制层,其中,所述光扩散层的粘合剂含有热固性树脂,所述粘着抑制层是含有电离辐射固化性树脂的树脂层。 在本发明的光扩散片中,使用电离辐射固化树脂作为粘着抑制层的粘结剂,可以提高粘合剂的交联密度,从而防粘层的耐磨性也 因为可以增加光扩散片的背面的耐磨性。 此外,可以有效地避免由于粘着抑制层与光扩散层的珠粒之间的接触引起的粘附抑制层中的划痕的可能发生。
    • 5. 发明申请
    • Optical sheet and backlight unit using the same
    • 光学片和背光单元使用相同
    • US20050068628A1
    • 2005-03-31
    • US10950723
    • 2004-09-27
    • Hitoshi Masaki
    • Hitoshi Masaki
    • C08J5/18C08F20/12C08L33/10G02B5/02G02F1/13357G03G15/04G02B13/20
    • G02B5/0226G02B5/0242G02B5/0278
    • An object of the present invention is to provide optical sheets having excellent heat resistance, moisture resistance, thermal dimensional stability and weather resistance, which hardly give rise to bending, yellowing and the like even though they receive generated heat from a lamp and ultraviolet ray irradiation, and to provide backlight units in which reduction of the occurrence of lack in uniformity of the brightness and lowering of the brightness is achieved using the optical sheet. The optical sheet of the present invention has a transparent substrate layer, and an optical layer overlaid to the front face side of the substrate layer. This optical layer includes a light diffusing agent in the binder. This binder is formed from a polymer composition containing (A) a copolymer and (B) a fine inorganic filler. This copolymer (A) includes at least one of a recurring unit derived from a (meth)acrylic ester having a cycloalkyl group, a recurring unit derived from an iso-butyl (meth)acrylate or a recurring unit derived from a tert-butyl (meth)acrylate.
    • 本发明的目的是提供即使从灯中产生的热量和紫外线照射也难以产生弯曲,变黄等优良的耐热性,耐湿性,热尺寸稳定性和耐候性优异的光学片 并且提供背光单元,其中使用光学片实现亮度均匀性的缺乏的发生的减少和亮度的降低。 本发明的光学片具有透明基板层和覆盖在基板层的正面侧的光学层。 该光学层包括粘合剂中的光漫射剂。 该粘合剂由含有(A)共聚物和(B)无机填料的聚合物组合物形成。 该共聚物(A)包括来源于具有环烷基的(甲基)丙烯酸酯的重复单元,来自(甲基)丙烯酸异丁酯的重复单元或由(甲基)丙烯酸叔丁酯 甲基)丙烯酸酯。