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    OPTICAL SYSTEM
    1.
    发明申请
    OPTICAL SYSTEM 有权

    公开(公告)号：US20240418920A1

    公开(公告)日：2024-12-19

    申请号：US18815033

    申请日：2024-08-26

    Applicant: 3M INNOVATIVE PROPERTIES COMPANY

    Inventor： Timothy L. Wong ,  David J.W. Aastuen ,  Takashi Fujita ,  Zhisheng Yun ,  Timothy J. Nevitt

    IPC: G02B5/30 ,  G02B27/01

    Abstract: An optical system for displaying an image to a viewer includes a pixelated display including a plurality of pixels emitting unpolarized image light; a partial reflector having an average optical reflectance of at least 30% in a predetermined wavelength range; a first retarder layer disposed between the pixelated display and the partial reflector; a second retarder layer disposed between the first retarder layer and the partial reflector; and a reflective polarizer disposed between the first and second retarder layers. The reflective polarizer is adapted to increase a brightness of a pixelated image emitted by the pixelated display and displayed to the viewer by recycling at least a portion of unpolarized image light emitted by the pixels; and receive an image ray reflected by the partial reflector and reflect the received image ray toward the viewer.

    Optical systems
    3.
    发明授权
    Optical systems 有权

    公开(公告)号：US12007595B2

    公开(公告)日：2024-06-11

    申请号：US18254437

    申请日：2021-11-16

    Applicant: 3M INNOVATIVE PROPERTIES COMPANY

    Inventor： John D. Le ,  Gregg A. Ambur ,  Zhisheng Yun ,  Robert M. Jennings ,  Arthur L. Kotz ,  Timothy L. Wong ,  David T. Yust ,  Timothy J. Nevitt ,  Kayla A. McGrath

    IPC: G02B5/30 ,  G02B1/04

    CPC classification number: G02B5/305 ,  G02B1/041

    Abstract: An optical assembly includes an integral lens assembly having one or more lenses bonded to each other with spaced apart major first and second lens surfaces. First and second optical films are bonded to respective major first and second lens surfaces. The first and second optical films includes a plurality of polymeric layers. Each of the polymeric layers have an average thickness of less than about 500 nm. For a substantially normally incident light and a visible wavelength range the plurality of polymeric layers in the first optical film has an average optical transmittance and an average optical reflectance of greater than about 70% for a first polarization state and an orthogonal second polarization state, respectively. The plurality of polymeric layers in the second optical film has an average optical transmittance of greater than about 70% for at least one of the first and second polarization states.

    REFLECTIVE POLARIZER AND DISPLAY SYSTEM
    4.
    发明申请
    REFLECTIVE POLARIZER AND DISPLAY SYSTEM 有权

    公开(公告)号：US20230074182A1

    公开(公告)日：2023-03-09

    申请号：US17797042

    申请日：2021-02-01

    Applicant: 3M INNOVATIVE PROPERTIES COMPANY

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

    IPC: G02B27/00 ,  G02B5/30 ,  H01L27/32 ,  H01L51/52

    Abstract: A reflective polarizer is such that for substantially normally incident light and for blue, green and red wavelengths, the reflective polarizer: has a transmission spectrum including a blue transmission stop band for the incident light polarized along a first direction; reflects at least about 50% of the incident light polarized along the first direction for the blue wavelength; transmits at least about 50% of the incident light polarized along an orthogonal second direction for each of the blue, green and red wavelengths; and transmits between about 50% and about 95% of the incident light polarized along the first direction for each of the green and red wavelengths. The blue transmission stop band has opposing first and second band edges having respective first and second slope magnitudes S1 and S2, where S1/S2≥2. A display system includes the reflective polarizer disposed on a display panel.

    Single packet reflective polarizer with thickness profile tailored for low color at oblique angles
    5.
    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).

    REFLECTIVE POLARIZER AND DISPLAY SYSTEM
    6.
    发明申请
    REFLECTIVE POLARIZER AND DISPLAY SYSTEM 有权

    公开(公告)号：US20220413198A1

    公开(公告)日：2022-12-29

    申请号：US17779413

    申请日：2020-12-08

    Applicant: 3M INNOVATIVE PROPERTIES COMPANY

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

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

    Abstract: A display system includes a display panel including a plurality light emitting pixels and a reflective polarizer disposed on the light emitting pixels. The reflective polarizer can have a reflection band having a lower overlap with an emission spectrum of red light emitting pixels for substantially normally incident light and a higher overlap with the emission spectrum of the red light emitting pixels for at least one incident angle greater than about 40 degrees. The reflective polarizer can have a reflection band overlapping an emission spectrum of blue light emitting pixels for substantially normally incident light.

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