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    OPTICAL FILM, REFLECTIVE POLARIZER, OPTICAL STACK, AND OPTICAL CONSTRUCTION
    32.
    发明公开
    OPTICAL FILM, REFLECTIVE POLARIZER, OPTICAL STACK, AND OPTICAL CONSTRUCTION 审中-公开

    公开(公告)号：US20230168421A1

    公开(公告)日：2023-06-01

    申请号：US17993142

    申请日：2022-11-23

    Applicant: 3M INNOVATIVE PROPERTIES COMPANY

    Inventor： Kristopher J. Derks ,  David J. McDaniel ,  Kevin T. Huseby ,  Stephen A. Johnson

    IPC: G02B5/30

    CPC classification number: G02B5/305 ,  G02B5/045

    Abstract: An optical film includes a plurality of polymeric microlayers disposed between, and co-extruded and co-stretched with, opposing first and second polymeric skins. Each of the polymeric microlayers has an average thickness of less than about 400 nm. Each of the first and second polymeric skins has an average thickness of greater than about 1 micron. At least one of the first and second polymeric skins includes a plurality of polymeric skin layers. Each of the polymeric skin layers has an average thickness of greater than about 0.5 microns. The plurality of polymeric skin layers includes a polymeric second skin layer disposed between polymeric first and third skin layers. The polymeric second skin layer includes one or more of a greater degree of crystallinity, a greater glass transition temperature, a greater modulus, and a greater in-plane birefringence than each of the polymeric first and third skin layers.

    Single packet reflective polarizer with thickness profile tailored for low color at oblique angles
    33.
    发明授权
    Single packet reflective polarizer with thickness profile tailored for low color at oblique angles 有权

    公开(公告)号：US11099312B2

    公开(公告)日：2021-08-24

    申请号：US16787608

    申请日：2020-02-11

    Applicant: 3M INNOVATIVE PROPERTIES COMPANY

    Inventor： Timothy J. Nevitt ,  Carl A. Stover ,  Gilles J. Benoit ,  Kristopher J. Derks ,  Zhaohui Yang

    IPC: G02B5/30 ,  B32B7/023 ,  B29D11/00 ,  B32B27/08 ,  B32B27/36 ,  B29K67/00 ,  B29L31/34

    Abstract: 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).

    SINGLE PACKET REFLECTIVE POLARIZER WITH THICKNESS PROFILE TAILORED FOR LOW COLOR AT OBLIQUE ANGLES
    34.
    发明申请
    SINGLE PACKET REFLECTIVE POLARIZER WITH THICKNESS PROFILE TAILORED FOR LOW COLOR AT OBLIQUE ANGLES 审中-公开

    公开(公告)号：US20200174170A1

    公开(公告)日：2020-06-04

    申请号：US16787608

    申请日：2020-02-11

    Applicant: 3M INNOVATIVE PROPERTIES COMPANY

    Inventor： Timothy J. Nevitt ,  Carl A. Stover ,  Gilles J. Benoit ,  Kristopher J. Derks ,  Zhaohui Yang

    IPC: G02B5/30 ,  B32B27/36 ,  B32B27/08 ,  B29D11/00 ,  B32B7/023

    Abstract: 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).

    FACETED MICROSTRUCTURED SURFACE
    35.
    发明申请
    FACETED MICROSTRUCTURED SURFACE 审中-公开

    公开(公告)号：US20200064525A1

    公开(公告)日：2020-02-27

    申请号：US16467221

    申请日：2018-01-08

    Applicant: 3M INNOVATIVE PROPERTIES COMPANY

    Inventor： Kristopher J. Derks ,  Tri D. Pham ,  Kenneth A. Epstein ,  David J. Lamb

    IPC: G02B5/02

    Abstract: An optical film (210) includes a microstructured surface (211) comprising a plurality of prismatic structures (230), the microstructured surface (211) defining a reference plane (241-242) and a thickness direction (243) perpendicular to the reference plane; wherein the plurality of prismatic structures includes a plurality of facets (231), each facet having a facet normal direction forming a polar angle with respect to the thickness direction and an azimuthal angle along the reference plane, and wherein the microstructured surface has a surface azimuthal distribution of the plurality of facets that is substantially uniform, and wherein the microstructured surface has a surface polar distribution of the plurality of facets that has an off-axis peak polar distribution.

    Display laminate with single packet biaxially birefringent reflective polarizer
    36.
    发明授权
    Display laminate with single packet biaxially birefringent reflective polarizer 有权

    公开(公告)号：US10545273B2

    公开(公告)日：2020-01-28

    申请号：US15776699

    申请日：2016-11-16

    Applicant: 3M INNOVATIVE PROPERTIES COMPANY

    Inventor： Carl A. Stover ,  Kristopher J. Derks ,  Timothy J. Nevitt ,  Gilles J. Benoit

    IPC: G02B5/30 ,  B29D11/00 ,  B32B17/06 ,  G02F1/1335 ,  B29L31/34

    Abstract: Multilayer optical film reflective polarizers previously considered to have excessive off-axis color can provide adequate performance in an LC display without any high haze light diffusing layer or air gap between the reflective polarizer and the back absorbing polarizer of the display. The reflective polarizer has only one packet of microlayers, and is oriented using a standard tenter such that birefringent microlayers in the film are biaxially birefringent. The microlayers in the packet have a layer thickness profile suitably tailored to avoid excessive perceived color at normal and oblique angles. A laminate made by combining this type of reflective polarizer with an absorbing polarizer, without an air gap or any high haze light diffusing layer or structure between the polarizers, can be used and incorporated into a liquid crystal display or the like with adequate color performance both at normal incidence and oblique incidence up to a polar angle of 60 degrees.

    LOW LAYER COUNT REFLECTIVE POLARIZER WITH OPTIMIZED GAIN
    38.
    发明申请
    LOW LAYER COUNT REFLECTIVE POLARIZER WITH OPTIMIZED GAIN 审中-公开
    具有优化增益的低层反射偏振器

    公开(公告)号：US20150316697A1

    公开(公告)日：2015-11-05

    申请号：US14800982

    申请日：2015-07-16

    Applicant: 3M INNOVATIVE PROPERTIES COMPANY

    Inventor： Kristopher J. Derks ,  Michael F. Weber ,  Shandon D. Hart ,  Carl A. Stover

    IPC: G02B5/30

    CPC classification number: G02B5/3066 ,  G02B5/3041 ,  G02B5/305 ,  G02B5/3083 ,  G02B27/283

    Abstract: Multilayer reflecting polarizing films are disclosed having increased in-plane refractive index differences between adjacent microlayers along both the pass and block axis, and having negative refractive index differences between adjacent microlayers along the thickness or z-axis. Major front and back surfaces of the film exposed to air provide a Fresnel reflectivity component to the pass axis reflectivity, and the microlayers provide a microlayer component to the pass axis reflectivity, such microlayer component preferably having a reflectivity of p-polarized light that increases with incidence angle faster than the Fresnel reflectivity component decreases so as to substantially avoid off-axis gain peaks for p-polarized light. The films preferably utilize a relatively small total number of microlayers, arranged in a single coherent stack with monotonic optical repeat unit thickness profile, and at least some microlayers preferably include polyethylene naphthalate or a copolymer thereof.

    Abstract translation: 公开了多层反射偏振膜，其在沿着通过和阻挡轴的相邻微层之间具有增加的面内折射率差异，并且沿着厚度或z轴具有相邻微层之间的负折射率差异。 暴露于空气的薄膜的主要前后表面为通过轴反射率提供菲涅尔反射率分量，微层为通过轴反射率提供微层成分，这种微层成分优选具有随着偏振光的增加而增加的p偏振光的反射率 比菲涅耳反射率分量更快的入射角降低，从而基本上避免了p偏振光的离轴增益峰值。 薄膜优选利用相对较小的总数量的微层，其布置在具有单调光学重复单元厚度分布的单个相干叠层中，并且至少一些微层优选包括聚萘二甲酸乙二醇酯或其共聚物。

    Thin hollow backlights with beneficial design characteristics
    39.
    发明授权
    Thin hollow backlights with beneficial design characteristics 有权
    薄空心背光灯具有有益的设计特点

    公开(公告)号：US08926159B2

    公开(公告)日：2015-01-06

    申请号：US13938016

    申请日：2013-07-09

    Applicant: 3M Innovative Properties Company

    Inventor： Timothy J. Nevitt ,  Timothy J. Hebrink ,  Michael F. Weber ,  Rolf W. Biernath ,  David G. Freier ,  John A. Wheatley ,  Andrew J. Ouderkirk ,  Charles D. Hoyle ,  Kristopher J. Derks

    IPC: F21V7/04 ,  F21V8/00 ,  G02F1/1335

    CPC classification number: F21V7/04 ,  G02B6/0055 ,  G02B6/0056 ,  G02B6/0068 ,  G02B6/0096 ,  G02F1/133603 ,  G02F1/133605 ,  G02F1/13362

    Abstract: A front and back reflector are arranged to form a hollow light recycling cavity having an output region, and one or more light sources (e.g. LEDs) are disposed to emit light into the cavity. In one aspect, the back reflector has a design characterized by a first and second parameter. The first design parameter is a ratio of the collective emitting area of the light sources Aemit to the area of the output region Aout, and Aemit/Aout is preferably from 0.0001 to 0.1. The second design parameter is SEP/H, where H is the depth of the recycling cavity, and SEP is an average plan view source separation associated with the light sources. Other aspects of the disclosed extended area light sources are also described.

    Abstract translation: 前后反射器被布置成形成具有输出区域的中空光循环腔，并且设置一个或多个光源（例如LED）以将光发射到空腔中。 在一个方面，后反射器具有以第一和第二参数为特征的设计。 第一设计参数是光源Aemit的总发光面积与输出区域Aout的面积的比，Aemit / Aout优选为0.0001〜0.1。 第二个设计参数是SEP / H，其中H是回收腔的深度，SEP是与光源相关的平均平面视图源分离。 还描述了所公开的扩展区域光源的其他方面。

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