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    FACETED MICROSTRUCTURED SURFACE
    21.
    发明申请
    FACETED MICROSTRUCTURED SURFACE 有权

    公开(公告)号：US20250155613A1

    公开(公告)日：2025-05-15

    申请号：US18931483

    申请日：2024-10-30

    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 includes a microstructured surface comprising a plurality of prismatic structures, the microstructured surface defining a reference plane and a thickness direction perpendicular to the reference plane; wherein the plurality of prismatic structures includes a plurality of facets, 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.

    Single packet reflective polarizer with thickness profile tailored for low color at oblique angles
    23.
    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：US11550089B2

    公开(公告)日：2023-01-10

    申请号：US17305867

    申请日：2021-07-16

    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).

    DISPLAY SYSTEM
    25.
    发明申请
    DISPLAY SYSTEM 有权

    公开(公告)号：US20220260869A1

    公开(公告)日：2022-08-18

    申请号：US17597809

    申请日：2020-08-10

    Applicant: 3M INNOVATIVE PROPERTIES COMPANY

    Inventor： Kristopher J. Derks ,  Shannon L. Siefken ,  Tao Liu ,  Nathaniel K. Naismith

    IPC: G02F1/1347 ,  G02F1/1335 ,  F21V8/00

    Abstract: A display system includes an extended illumination source, a first liquid crystal assembly disposed on the extended illumination source, and a second liquid crystal assembly disposed on the first liquid crystal display assembly. The first liquid crystal assembly includes a bottom reflective polarizer, a top reflective polarizer, and a bottom liquid crystal panel disposed between the top and bottom reflective polarizers. The second liquid crystal assembly includes a top absorbing polarizer, and a top liquid crystal panel disposed between the top absorbing polarizer and the first liquid crystal assembly.

    Polarizer stack
    26.
    发明授权
    Polarizer stack 有权

    公开(公告)号：US11022734B2

    公开(公告)日：2021-06-01

    申请号：US16301106

    申请日：2017-05-16

    Applicant: 3M INNOVATIVE PROPERTIES COMPANY

    Inventor： Carl A. Stover ,  Kristopher J. Derks

    IPC: G02B5/30 ,  G02B27/28 ,  G02F1/1335

    Abstract: A polarizer stack including an absorbing polarizer and a multilayer polymeric reflective polarizer bonded together is described. The absorbing polarizer has a first block axis and the reflective polarizer has a second block axis substantially parallel to the first block axis. The reflective polarizer has a shrinkage in a range of 0.4 percent to 3 percent along the second block axis when the reflective polarizer is heated at 95° C. for 40 minutes.

    Low layer count reflective polarizer with optimized gain
    28.
    发明授权
    Low layer count reflective polarizer with optimized gain 有权

    公开(公告)号：US09513420B2

    公开(公告)日：2016-12-06

    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 ,  G02B27/28

    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.

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