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    Backlighting for display systems
    71.
    发明授权
    Backlighting for display systems 有权

    公开(公告)号：US11782310B2

    公开(公告)日：2023-10-10

    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: G02F1/00 ,  G02F1/13357 ,  G02B1/04 ,  G02F1/1335

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

    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.

    Polarization beam splitter and hot mirror for heads up display
    72.
    发明授权
    Polarization beam splitter and hot mirror for heads up display 有权

    公开(公告)号：US11740480B2

    公开(公告)日：2023-08-29

    申请号：US17795065

    申请日：2021-01-27

    Applicant: 3M INNOVATIVE PROPERTIES COMPANY

    Inventor： Craig R. Schardt ,  Adam D. Haag ,  Stephen J. Willet

    IPC: G02B27/10 ,  G02B5/28 ,  G02B27/01

    CPC classification number: G02B27/1013 ,  G02B5/282 ,  G02B27/0101 ,  G02B2027/0145

    Abstract: An optical system for displaying a virtual image to a viewer includes stacked integral first reflective polarizer and integral second reflective polarizer, a display, and a mirror. For substantially normally incident light: for at least one visible wavelength in a first wavelength range, the first reflective polarizer reflects at least 60% of the incident light having a first polarization state and transmits at least 60% of the incident light having an orthogonal second polarization state, and the second reflective polarizer transmits at least 60% of the incident light for each of the first and second polarization states; and for at least one infrared wavelength in a second wavelength range, the first reflective polarizer reflects at least 60% of the incident light having the first polarization state and transmits at least 60% of the incident light having the second polarization state, and the second reflective polarizer reflects at least 60% of the incident light having the second polarization state and transmits at least 20% of the light having the first polarization state.

    REFLECTIVE POLARIZER AND OPTICAL SYSTEM
    74.
    发明申请
    REFLECTIVE POLARIZER AND OPTICAL SYSTEM 有权

    公开(公告)号：US20220299692A1

    公开(公告)日：2022-09-22

    申请号：US17636394

    申请日：2019-09-27

    Applicant: 3M INNOVATIVE PROPERTIES COMPANY

    Inventor： Fuguo Xu ,  Adam D. Haag ,  Martin E. Denker ,  Timothy J. Nevitt

    IPC: G02B5/30 ,  G02B5/26 ,  H01L27/32 ,  H01L51/52

    Abstract: An optical system (200) includes an emissive display (220) and a reflective polarizer (100) disposed on the display (220). The display (220) includes a blue pixel (222b) emitting light having a peak at a wavelength λb. For substantially normally incident light: for the wavelength λb, the reflective polarizer (100) reflects at least 30% of the incident light having a first polarization state (b) and transmits at least 75% of the incident light having an orthogonal second polarization state(a); and for at least one wavelength λ1 greater than λb, λ1-λb≤50 nm, the reflective polarizer (100) transmits at least 75% of the incident light for each of the first and second polarization states. For the wavelength λb, the reflective polarizer (100) 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 greater than the first incident angle by less than about 50 degrees.

    OPTICAL FILM AND OPTICAL STACK
    75.
    发明申请
    OPTICAL FILM AND OPTICAL STACK 有权

    公开(公告)号：US20220236466A1

    公开(公告)日：2022-07-28

    申请号：US17605395

    申请日：2020-05-20

    Applicant: 3M INNOVATIVE PROPERTIES COMPANY

    Inventor： Adam D. Haag ,  Yi-Chen Chen ,  Tze Yuan Wang ,  Hiroki Matsuda ,  Michelle L. Toy ,  Ryan J. Eismin ,  John F. VanDerlofske, III ,  David J. McDaniel ,  Matthew B. Johnson

    IPC: G02B5/30

    Abstract: An optical film includes a plurality of alternating first and second polymeric layers, such that the first polymeric layers have a smaller average in-plane index of refraction than the second polymeric layers and the first polymeric layers have a glass transition temperature of at least 107 deg. C. The optical film may be a reflective polarizer. An optical stack includes a linear absorbing polarizer and the reflective polarizer disposed on, and bonded to, the absorbing polarizer. The reflective polarizer has an optical reflectance of at least 60% for a first polarization state and an optical transmittance of at least 60% for an orthogonal second polarization state. When heated at 105 deg. C. for 15 minutes, a difference in shrinkage of the reflective polarizer and the absorbing polarizer along the first and second polarization states is greater than about zero and 0.2%, respectively.

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