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    Display optical film and backlight unit
    1.
    发明授权
    Display optical film and backlight unit 有权

    公开(公告)号：US12210241B2

    公开(公告)日：2025-01-28

    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

    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.

    Optical Film and Display System Including Same
    2.
    发明公开
    Optical Film and Display System Including Same 审中-公开

    公开(公告)号：US20240319422A1

    公开(公告)日：2024-09-26

    申请号：US18579434

    申请日：2022-07-18

    Applicant: 3M INNOVATIVE PROPERTIES COMPANY

    Inventor： Yu Hsin Lu ,  Chiu-Hsing Lin ,  Ryan T. Fabick ,  Masaki Yamamuro

    IPC: G02B5/28 ,  H01L25/075

    CPC classification number: G02B5/287 ,  H01L25/0753

    Abstract: An optical film includes a plurality of polymeric layers, such that a transmittance of the polymeric layers versus wavelength includes: a left band edge separating a wavelength range where the polymeric layers has a transmittance of greater than about 60% from a wavelength range where the polymeric layers has a reflectance of greater than about 80%; and a mid-wavelength corresponding to a transmittance of about 50% along the left band edge. A display system includes a light converting film having green and red emission spectra including respective green and red emission peaks with respective green and red full width at half maxima (FWHMs); and includes the optical film disposed on the light converting film. For each of the FWHMs, the mid-wavelength is less than or equal to a shortest wavelength of the FWHM or greater than the shortest wavelength by no more than about 30% of the FWHM.

    Display optical film and backlight unit
    5.
    发明授权
    Display optical film and backlight unit 有权

    公开(公告)号：US11829024B2

    公开(公告)日：2023-11-28

    申请号：US17435203

    申请日：2020-02-18

    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.

    Backlight for an image forming device comprising an optical cavity formed by opposing cold and hot mirrors
    6.
    发明授权
    Backlight for an image forming device comprising an optical cavity formed by opposing cold and hot mirrors 有权

    公开(公告)号：US11487159B2

    公开(公告)日：2022-11-01

    申请号：US17419901

    申请日：2020-01-06

    Applicant: 3M INNOVATIVE PROPERTIES COMPANY

    Inventor： Quinn D. Sanford ,  Matthew B. Johnson ,  Ryan T. Fabick ,  Nathaniel K. Naismith

    IPC: G02F1/13357 ,  G02F1/1335

    Abstract: A backlight (100) for an image forming device (70) includes spaced-apart front and back optical reflectors (20, 10) defining an optical cavity (18) therebetween, and at least one light source (15) for emitting light into the optical cavity. The front optical reflector (20) is disposed between the image forming device and the back optical reflector (10). For substantially normally incident light and for non-overlapping first (e.g. visible light) and second (e.g. infrared) wavelength ranges, the front optical reflector (20) may transmit (80c) at least 70% of light (80a) for each wavelength in the first wavelength range, and may reflect (90b) at least 70% of light (90a) for each wavelength in the second wavelength range. The back optical reflector (10) may reflect (80b) at least 70% of light for each wavelength in the first wavelength range, and may transmit (90c) at least 70% of light (90b) for each wavelength in the second wavelength range. The light (80a, 90a) emitted by the at least one light source (15) has at least one wavelength in the first wavelength range and at least one wavelength in the second wavelength range.

    OPTICAL SYSTEM AND OPTICAL COMBINATION
    10.
    发明申请
    OPTICAL SYSTEM AND OPTICAL COMBINATION 有权

    公开(公告)号：US20240369756A1

    公开(公告)日：2024-11-07

    申请号：US18777926

    申请日：2024-07-19

    Applicant: 3M INNOVATIVE PROPERTIES COMPANY

    Inventor： Adam D. Haag ,  Matthew B. Johnson ,  Ryan T. Fabick

    IPC: F21V8/00 ,  G02F1/13357

    Abstract: An optical system includes an extended illumination source configured to emit light from an extended emission surface thereof toward a display panel. The emitted light includes substantially distinct blue, green and red emission spectra having respective blue, green and red peaks at respective blue, green and red peak wavelengths, and corresponding blue, green and red full widths at half maxima (FWHMs). The blue FWHM extends from a smaller blue wavelength to a longer blue wavelength. The optical system further includes reflective polarizer disposed on the emission surface of the extended illumination source. The reflective polarizer includes a plurality of first polymeric layers. The optical system also includes an optical filter disposed between the reflective polarizer and the emission surface of the extended illumination source.

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