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    Narrow-band peripheral see-through pancake lens assembly and display device with same
    12.
    发明授权
    Narrow-band peripheral see-through pancake lens assembly and display device with same 有权

    公开(公告)号：US11579425B1

    公开(公告)日：2023-02-14

    申请号：US16848652

    申请日：2020-04-14

    Applicant: META PLATFORMS TECHNOLOGIES, LLC

    Inventor： Ying Geng ,  Brian Wheelwright ,  Jacques Gollier ,  Yusufu Njoni Bamaxam Sulai ,  Babak Amirsolaimani ,  Weichuan Gao ,  Gang Li ,  Mengfei Wang ,  Fenglin Peng

    IPC: G02B17/08 ,  G02B3/08

    Abstract: An optical assembly includes at least one substrate that provides a first curved surface and a second surface. The optical assembly also includes a beam splitter on the first curved surface, a reflector on the second surface, and an optical retarder disposed between the beam splitter and the reflector. The optical assembly is configured to transmit the first light through the optical assembly at a first optical power. The optical assembly is also configured to transmit second light through peripheral portions of the optical assembly at a second optical power that is less than the first optical power. The first light includes light having a first polarization and wavelengths within a predetermined wavelength range. The second light includes light having wavelengths within the predetermined wavelength range and a second polarization orthogonal to the first polarization, as well as light having wavelengths outside the predetermined wavelength range.

    Display with switchable retarder array
    13.
    发明授权
    Display with switchable retarder array 有权

    公开(公告)号：US11467332B2

    公开(公告)日：2022-10-11

    申请号：US16734167

    申请日：2020-01-03

    Applicant: META PLATFORMS TECHNOLOGIES, LLC

    Inventor： Fenglin Peng ,  Ying Geng ,  Jacques Gollier ,  Garam Young

    IPC: G02B6/00 ,  F21V8/00 ,  G02F1/01 ,  G02B27/01 ,  G02B27/28 ,  G02F1/139

    Abstract: A display device includes a waveguide, an array of tunable retarders in contact with the waveguide, and a polarization selective optical element. A respective tunable retarder of the array of tunable retarders receives light from the waveguide. The respective tunable retarder has a first state, which causes the respective tunable retarder to direct light having a first polarization in a first direction and a second state, which causes the respective tunable retarder to direct light having a second polarization that is distinct from the second polarization in the first direction. The polarization selective optical element is located adjacent to the array of tunable retarders so that the light having the second polarization propagates from the polarization selective optical element in a second direction and the light having the second polarization propagates from the polarization selective optical element in a third direction distinct from the second direction.

    Active zonal display illumination using a chopped lightguide
    18.
    发明授权
    Active zonal display illumination using a chopped lightguide 有权

    公开(公告)号：US11726336B2

    公开(公告)日：2023-08-15

    申请号：US16941337

    申请日：2020-07-28

    Applicant: META PLATFORMS TECHNOLOGIES, LLC

    Inventor： Jacques Gollier ,  Fenglin Peng ,  Ying Geng

    IPC: G02B27/01 ,  G02B27/28 ,  G02F1/01 ,  G02F1/137

    CPC classification number: G02B27/0176 ,  G02B27/0172 ,  G02B27/283 ,  G02F1/0136 ,  G02F1/137 ,  G02B2027/015 ,  G02B2027/0152 ,  G02B2027/0178

    Abstract: An optical device includes a substrate, a plurality of optical elements positioned on the substrate, and one or more switchable cells. A respective optical element of the plurality of optical elements is configured to redirect light having a first polarization and transmit light having a second polarization orthogonal to the first polarization. The plurality of optical elements includes a first optical element located on a first region of the substrate and a second optical element located on a second region of the substrate. A respective switchable cell of the one or more switchable cells includes optically anisotropic molecules. The one or more switchable cells include a first switchable cell located on a first cell location of the substrate between the first region and the second region of the substrate. Also disclosed are a display device including the optical device and a method performed by the optical device.

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