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    SUBSTRATE FOR TOUCH SENSOR
    91.
    发明申请
    SUBSTRATE FOR TOUCH SENSOR 审中-公开

    公开(公告)号：US20190129218A1

    公开(公告)日：2019-05-02

    申请号：US16099600

    申请日：2017-05-15

    Applicant: 3M INNOVATIVE PROPERTIES COMPANY

    Inventor： Richard Y. Liu ,  Derek W. Patzman ,  Stephen A. Johnson

    IPC: G02F1/1333 ,  G02F1/1343 ,  G06F3/041 ,  G02B5/30 ,  B32B27/08 ,  B32B27/36 ,  B32B37/15

    Abstract: Substrates suitable for use in a touch sensor are described. In some cases, the substrates include an inner layer and first and second heat-set polymeric outer layers. The first and second outer layers each have an in-plane birefringence of less than 0.1. The inner layer is substantially uniaxially birefringent and has an in-plane birefringence greater than 0.01. In some cases, a substrate includes a block copolymer which includes a first polyester and second polyester. The first polyester has a melting point greater than 200 ° C., and the second polyester having a melting point less than 200° C. The block copolymer includes the second polyester at 50 to 80 percent by weight. The substrate is substantially uniaxially birefringent and has an in-plane birefringence between 0.001 and 0.1.

    PATTERNED MARKING OF MULTILAYER OPTICAL FILM BY THERMAL CONDUCTION
    94.
    发明申请
    PATTERNED MARKING OF MULTILAYER OPTICAL FILM BY THERMAL CONDUCTION 审中-公开

    公开(公告)号：US20180313992A1

    公开(公告)日：2018-11-01

    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 ,  G02B5/28 ,  G02B5/08

    CPC classification number: G02B5/3083 ,  G02B5/0841 ,  G02B5/285 ,  G02B5/305

    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).

    Patterned marking of multilayer optical film by thermal conduction
    95.
    发明授权
    Patterned marking of multilayer optical film by thermal conduction 有权

    公开(公告)号：US10018762B2

    公开(公告)日：2018-07-10

    申请号：US15864888

    申请日：2018-01-08

    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

    CPC classification number: G02B5/3083 ,  G02B5/0841 ,  G02B5/285 ,  G02B5/305

    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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