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    Low layer count reflective polarizer with optimized gain
    12.
    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.

    OPTICAL COMPONENTS AND OPTICAL SYSTEMS
    13.
    发明公开
    OPTICAL COMPONENTS AND OPTICAL SYSTEMS 审中-公开

    公开(公告)号：US20240288616A1

    公开(公告)日：2024-08-29

    申请号：US18657033

    申请日：2024-05-07

    Applicant: 3M INNOVATIVE PROPERTIES COMPANY

    Inventor： Gregg A. Ambur ,  Jo A. Etter ,  Adam D. Haag ,  Carl A. Stover ,  Timothy J. Nevitt ,  Zhisheng Yun ,  Timothy L. Wong

    IPC: G02B5/30 ,  G02B27/28

    CPC classification number: G02B5/305 ,  G02B27/283

    Abstract: An optical component includes a first optical element having a curved first major surface; and an optical stack formed into a curved shape. The optical stack is bonded and conforms to the curved first major surface of the first optical element. The optical stack includes a reflective polarizer including a plurality of polymeric layers; and a non-adhesive flexible optical layer bonded to the reflective polarizer prior to forming the optical stack into the curved shape, such that the non-adhesive flexible optical layer bonded to the reflective polarizer improves a desired optical property of the reflective polarizer upon forming the optical stack into the curved shape relative to that of the reflective polarizer being formed into the curved shape without the non-adhesive flexible optical layer bonded to the reflective polarizer.

    DISPLAY OPTICAL FILM AND BACKLIGHT UNIT
    16.
    发明公开
    DISPLAY OPTICAL FILM AND BACKLIGHT UNIT 审中-公开

    公开(公告)号：US20240045261A1

    公开(公告)日：2024-02-08

    申请号：US18381412

    申请日：2023-10-18

    Applicant: 3M INNOVATIVE PROPERTIES COMPANY

    Inventor： Gilles J. Benoit ,  Carl A. Stover ,  Matthew B. Johnson ,  Ryan T. Fabick ,  Quinn D. Sanford

    IPC: G02F1/1335 ,  G02F1/13357

    CPC classification number: G02F1/133533 ,  G02F1/133605

    Abstract: An optical stack for reflecting and transmitting light in a predetermined wavelength range includes stacked first and second optical films, the predetermined wavelength range defining a first wavelength range and a remaining wavelength range. For normally incident light and for each wavelength in a first wavelength range, the first optical film substantially reflects light having a first polarization state, and substantially transmits light having a second polarization state. For each of the first and second polarization states, for wavelengths in the first wavelength range, the second optical film has a maximum optical transmittance Tmax for light incident at a first incident angle, and an optical transmittance Tmax/2 for light incident at a second incident angle, where the second incident angle is greater than the first incident angle by less than about 50 degrees. For wavelengths in the remaining wavelength range, the second optical film reflects at least 80% of light.

    BACKLIGHTING FOR DISPLAY SYSTEMS
    18.
    发明公开
    BACKLIGHTING FOR DISPLAY SYSTEMS 审中-公开

    公开(公告)号：US20230176419A1

    公开(公告)日：2023-06-08

    申请号：US18073813

    申请日：2022-12-02

    Applicant: 3M INNOVATIVE PROPERTIES COMPANY

    Inventor： Yu Hsin Lu ,  Gary T. Boyd ,  Matthew B. Johnson ,  Ryan T. Fabick ,  Carl A. Stover ,  Adam D. Haag

    IPC: G02F1/13357 ,  G02F1/1335 ,  G02B1/04

    CPC classification number: G02F1/133606 ,  G02F1/133603 ,  G02F1/133514 ,  G02F1/133536 ,  G02B1/04

    Abstract: A display system includes a light source configured to emit light from a light exit surface, the emitted light having an emitted wavelength. An optical filter is disposed on the light exit surface of the light source. One or more light converting films are disposed between the optical filter and the light exit surface of the light source. The one or more light converting films are configured to receive the emitted light from the light source and convert at least portions of the received emitted light to blue, green, and red lights having respective blue, green and red wavelengths. For a substantially normally incident light and for at least an in-plane first polarization state, the optical filter reflects more than about 80% of the incident light having the emitted wavelength, and transmits greater than about 60% of the incident light for each of the blue, green and red wavelengths.

    SINGLE PACKET REFLECTIVE POLARIZER WITH THICKNESS PROFILE TAILORED FOR LOW COLOR AT OBLIQUE ANGLES
    20.
    发明申请
    SINGLE PACKET REFLECTIVE POLARIZER WITH THICKNESS PROFILE TAILORED FOR LOW COLOR AT OBLIQUE ANGLES 有权

    公开(公告)号：US20210341660A1

    公开(公告)日：2021-11-04

    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

    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).

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