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    FACETED MICROSTRUCTURED SURFACE
    1.
    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.

    OPTICAL SYSTEM
    2.
    发明申请
    OPTICAL SYSTEM 有权

    公开(公告)号：US20250153449A1

    公开(公告)日：2025-05-15

    申请号：US19023680

    申请日：2025-01-16

    Applicant: 3M INNOVATIVE PROPERTIES COMPANY

    Inventor： Andrew J. Ouderkirk ,  Timothy L. Wong ,  Zhisheng Yun ,  Erin A. McDowell ,  Gregg A. Ambur

    IPC: B29D11/00 ,  G02B5/30 ,  G02B13/00 ,  G02B17/08 ,  G02B27/00 ,  G02B27/01 ,  G02B27/09 ,  G02B27/14 ,  G02B27/28 ,  G03B21/28

    Abstract: An optical system includes a partial reflector having an average optical reflectance of at least 30% in a plurality of wavelengths, an image source disposed to emit image light toward the partial reflector, and a reflective polarizer disposed proximate the partial reflector. The reflective polarizer is curved about two orthogonal axes and can include at least one layer substantially optically uniaxial at at least one location. The image light may be transmitted by the reflective polarizer after it is first reflected by the reflective polarizer. Substantially any chief light ray 10 having at least first and second wavelengths at least 150 nm apart in the plurality of wavelengths and emitted by the image source and transmitted by a stop surface or exit pupil of the optical system has a color separation distance of less than 1.5 percent of a field of view.

    Optical Films for Display Systems
    4.
    发明申请
    Optical Films for Display Systems 有权

    公开(公告)号：US20250138231A1

    公开(公告)日：2025-05-01

    申请号：US18836889

    申请日：2023-01-31

    Applicant: 3M INNOVATIVE PROPERTIES COMPANY

    Inventor： Matthew B. Johnson ,  Bharat R. Acharya

    IPC: G02B5/28

    Abstract: A display system includes a light source emitting blue light including blue wavelength, and UV light including UV wavelength. A first multilayer optical film (MOF) is disposed between a display panel and a second MOF. Light conversion films receive and convert emitted blue light to green and red lights. At incident angles of less than 10 degrees, the first MOF transmits greater than 50% of light for the blue wavelength and reflects greater than 60% for green and red peak wavelengths. The second MOF transmits greater than 50% for blue, green and red peak wavelengths, and reflects greater than about 60% for the UV wavelength. At oblique incident angles, the first MOF reflects greater than 50% for the blue, green and red peak wavelengths, and the second MOF transmits greater than 50% for the blue, green and red peak wavelengths, and transmits greater than 60% for the UV wavelength.

    COATED MICROSTRUCTURED FILMS, METHODS OF MAKING SAME, AND METHODS OF MAKING LIGHT CONTROL FILMS
    5.
    发明申请
    COATED MICROSTRUCTURED FILMS, METHODS OF MAKING SAME, AND METHODS OF MAKING LIGHT CONTROL FILMS 有权

    公开(公告)号：US20250130352A1

    公开(公告)日：2025-04-24

    申请号：US18681559

    申请日：2022-08-15

    Applicant: 3M INNOVATIVE PROPERTIES COMPANY

    Inventor： Daniel J. Schmidt ,  Morgan A. Priolo ,  Caleb T. Nelson ,  Kevin W. Gotrik

    IPC: G02B5/00 ,  G02B1/04

    Abstract: The present disclosure provides a coated microstructured film (100a-c). The coated film includes microstructures (110) extending across a first surface of the microstructured film (100a-e) and a coating (130) on a first portion of at least some of the microstructures (110). The coating (130) includes one or more polyelectrolytes and has an average thickness T. A second portion of the coated microstructures either lacks the coating or has the coating with an average thickness of no more than 50% of T. The coating (130) is essentially free of any light absorptive material. A method of making the coated microstructured film (100a-c) is also provided. The method includes obtaining a microstructured film (100a), applying a coating (130) containing one or more polyelectrolytes to at least some of the microstructures (110), and removing at least some of the coating (130) from a second portion of the coated microstructures. Additionally, the present disclosure provides a method of making a light control film (110d. 100e). The method includes the above method as well as either infusing a light absorptive material into the coating of the coated microstructured film (100b-d) or applying a layer of a pigment on the coating. Such a light control film exhibits a transmission of visible light of 75% or greater at a viewing angle of 0 degrees.

    COLOR STABLE EPOXY COMPOSITIONS
    6.
    发明申请
    COLOR STABLE EPOXY COMPOSITIONS 有权

    公开(公告)号：US20250129204A1

    公开(公告)日：2025-04-24

    申请号：US18835189

    申请日：2023-02-16

    Applicant: 3M INNOVATIVE PROPERTIES COMPANY

    Inventor： Yangbin Chen ,  Eric G. Larson

    IPC: C08G59/18 ,  C08G59/24 ,  C08G59/42 ,  C08G59/68 ,  C09J5/04 ,  C09J163/00

    Abstract: Curable compositions include a non-aromatic epoxy-functional epoxy resin adduct, a non-aromatic epoxy resin, and a non-aromatic anhydride-based curing agent. The epoxy resin adduct is the reaction product of a reaction mixture including a polyfunctional thiol and a poly functional epoxy resin. The cured composition has an Izod Impact Test (Notched Izod) test method (ASTM D256) value of at least 40 J/m and is color stable such that upon exposure to an acid bath in accordance with the Acid Bath Test Method, exhibits a ΔE 94 color change of less than 1.

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