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    • 10. 发明申请
    • SINGLE PACKET REFLECTIVE POLARIZER WITH THICKNESS PROFILE TAILORED FOR LOW COLOR AT OBLIQUE ANGLES
    • 单层反光偏光片,厚度适中,低色调,倾斜角度
    • WO2018052872A1
    • 2018-03-22
    • PCT/US2017/051062
    • 2017-09-12
    • 3M INNOVATIVE PROPERTIES COMPANY
    • NEVITT, Timothy J.STOVER, Carl A.BENOIT, Gilles J.DERKS, Kristopher J.YANG, Zhaohui
    • G02B27/28G02B5/30G02B5/28G02F1/1335B29D11/00B32B7/02
    • Multilayer optical film reflective polarizers previously considered to have excessive off-axis color can provide adequate performance in an LC display in an "on-glass" configuration, laminated to a back absorbing polarizer of the display, without any light diffusing layer or air gap in such laminate. The reflective polarizer is a tentered-one-packet (TOP) multilayer film, having only one packet of microlayers, and oriented using a standard tenter such that birefringent microlayers in the film are biaxially birefringent. The thickness profile of optical repeat units (ORUs) in the microlayer packet is tailored to avoid excessive perceived color at normal and oblique angles. Color at high oblique angles in the white state of the display is reduced by positioning thicker ORUs closer to the absorbing polarizer, and by ensuring that, with regard to a boxcar average of the ORU thickness profile, the average slope from an ORU(600) to an ORU(645) does not exceed 1.8 times the average slope from an ORU(450) to the ORU(600).
    • 之前被认为具有过度离轴颜色的多层光学膜反射偏振器可以在“玻璃上”的LC显示器中提供足够的性能。 配置,层压到显示器的背吸式偏振片上,在这种层压件中没有任何光漫射层或气隙。 反射偏振器是仅具有一层微层的tentered-one-packet(TOP)多层膜,并且使用标准拉幅机取向,使得膜中的双折射微层为双轴双折射。 微层包装中的光学重复单元(ORU)的厚度分布被定制以避免在正常和倾斜角度处过度感知颜色。 通过将较厚的ORU放置在靠近吸收型偏振器处并通过确保关于ORU厚度轮廓的BOXCAR平均值来确定来自ORU(600)的平均斜率, 到ORU(645)不超过从ORU(450)到ORU(600)的平均斜率的1.8倍。