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    LIGHT SOURCE INCORPORATING MULTILAYER OPTICAL FILM
    21.
    发明申请
    LIGHT SOURCE INCORPORATING MULTILAYER OPTICAL FILM 审中-公开
    光源包含多层光学膜

    公开(公告)号：US20160370534A1

    公开(公告)日：2016-12-22

    申请号：US15117256

    申请日：2015-02-26

    Applicant: 3M INNOVATIVE PROPERTIES COMPANY

    Inventor： Tao Liu ,  William W. Merrill ,  Mark E. Napierala ,  David T. Yust

    IPC: F21V8/00 ,  F21S8/10 ,  G02B5/28 ,  G02B5/30 ,  G02B5/13 ,  G02B5/124

    CPC classification number: G02B6/0053 ,  F21S43/239 ,  F21S43/245 ,  G02B1/08 ,  G02B5/124 ,  G02B5/13 ,  G02B5/28 ,  G02B5/3083 ,  G02B6/0001 ,  G02B6/0031 ,  G02B6/0046 ,  G02B6/0055 ,  G02B6/0056 ,  G02B6/006 ,  G02B6/0068

    Abstract: A light source includes a lightguide having a top side comprising an optical film, a bottom side comprising a diffuse reflector, and an input side extending between the top and bottom sides. An illumination source is disposed proximate the input side of the lightguide. The optical film has adjacent first and second zones, each zone extending substantially an entire thickness of the optical stack or an entire thickness of at least one optical packet of the optical film. Light enters the lightguide from the light source propagating within the lightguide and being either reflected or transmitted by the optical film primarily by optical interference. For at least one first incidence angle and at least one wavelength, the first and second zones of the optical film have substantially equal optical transmittance. For at least one second incidence angle and at least one wavelength, the second zone has substantially greater optical transmittance than the first zone of the optical film.

    Abstract translation: 光源包括具有包括光学膜的顶侧的光导，包括漫反射器的底侧和在顶侧和底侧之间延伸的输入侧。 照明源设置在光导的输入侧附近。 光学薄膜具有相邻的第一和第二区域，每个区域基本上延伸光学叠层的整个厚度或光学薄膜的至少一个光学分组的整个厚度。 光从光源中传播的光源进入光导，并且主要通过光学干涉被光学膜反射或透射。 对于至少一个第一入射角和至少一个波长，光学膜的第一和第二区具有基本相等的光透射率。 对于至少一个第二入射角和至少一个波长，第二区具有比光学膜的第一区大得多的光透射率。

    Patterned marking of multilayer optical film by thermal conduction
    28.
    发明授权
    Patterned marking of multilayer optical film by thermal conduction 有权

    公开(公告)号：US10254460B2

    公开(公告)日：2019-04-09

    申请号：US16030109

    申请日：2018-07-09

    Applicant: 3M INNOVATIVE PROPERTIES COMPANY

    Inventor： Michael Benton Free ,  Martin B. Wolk ,  Rolf W. Biernath ,  Stephen A. Johnson ,  William W. Merrill ,  William F. Edmonds ,  Claire A. Jalbert

    IPC: G02B5/30 ,  G02B5/08 ,  G02B5/28

    Abstract: A multilayer optical film has a packet of microlayers that selectively reflect light by constructive or destructive interference to provide a first reflective characteristic. At least some of the microlayers are birefringent. A stabilizing layer attaches to and covers the microlayer packet proximate an outer exposed surface of the film. Heating element(s) can physically contact the film to deliver heat to the packet through the stabilizing layer by thermal conduction, at altered region(s) of the film, such that the first reflective characteristic changes to an altered reflective characteristic in the altered region(s) to pattern the film. The stabilizing layer provides sufficient heat conduction to allow heat from the heating elements to change (e.g. reduce) the birefringence of the birefringent microlayers disposed near the outer exposed surface in the altered region(s), while providing sufficient mechanical support to avoid substantial layer distortion of the microlayers near the outer exposed surface in the altered region(s).

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