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    LIGHT GUIDE ILLUMINATION ASSEMBLY FOR PROVIDING INCREASED CONTRAST
    2.
    发明公开
    LIGHT GUIDE ILLUMINATION ASSEMBLY FOR PROVIDING INCREASED CONTRAST 审中-公开

    公开(公告)号：US20230258950A1

    公开(公告)日：2023-08-17

    申请号：US18154038

    申请日：2023-01-12

    Applicant: Meta Platforms Technologies, LLC

    Inventor： Wanli CHI ,  Sihui HE ,  Ying GENG ,  Maxwell PARSONS

    IPC: G02B27/09 ,  G02B27/00

    CPC classification number: G02B27/0938 ,  G02B27/0093 ,  G02B6/0016

    Abstract: A device includes a light source configured to output a first beam, and a light guide coupled with an in-coupling element and an out-coupling element. The device includes a display panel and a lens assembly disposed at opposite sides of the light guide. The in-coupling element is configured to couple the first beam into the light guide as a second beam. The out-coupling element is configured to couple a first portion of the second beam out of the light guide as a third beam propagating toward the display panel to illuminate the display panel, and couple a second portion of the second beam out of the light guide as a fourth beam propagating toward the lens assembly. A normal of a surface of the light guide where the out-coupling element is disposed is tilted by a predetermined angle with respect to an axis of the display panel.

    HIGH EFFICIENCY OPTICAL ASSEMBLY WITH FOLDED OPTICAL PATH
    4.
    发明公开
    HIGH EFFICIENCY OPTICAL ASSEMBLY WITH FOLDED OPTICAL PATH 审中-公开

    公开(公告)号：US20230168506A1

    公开(公告)日：2023-06-01

    申请号：US17540049

    申请日：2021-12-01

    Applicant: META PLATFORMS TECHNOLOGIES, LLC

    Inventor： Gang LI ,  Brian WHEELWRIGHT ,  Andrew MAIMONE ,  Yang ZHAO ,  Ying GENG ,  Douglas Robert LANMAN

    IPC: G02B27/01

    CPC classification number: G02B27/0172 ,  G02B2027/0178 ,  G02B2027/0174

    Abstract: A display device includes a display module for providing first image light. The display device also includes a first optical element for receiving and transmitting the first image light from the display module. The display module includes a region from which the first image light is provided in directions other than a direction perpendicular to the first optical element. The display device further includes a second optical element so that the second optical element receives the first image light transmitted through the first optical element and sends the received first image light back toward the first optical element as second image light. The first optical element receives the second image light from the second optical element and sends the second image light back toward the second optical element, and the second optical element receives and transmits the second image light from the first optical element.

    WAVEGUIDE CONFIGURATIONS IN A HEAD-MOUNTED DISPLAY (HMD) FOR IMPROVED FIELD OF VIEW (FOV)
    5.
    发明申请
    WAVEGUIDE CONFIGURATIONS IN A HEAD-MOUNTED DISPLAY (HMD) FOR IMPROVED FIELD OF VIEW (FOV) 有权

    公开(公告)号：US20220350149A1

    公开(公告)日：2022-11-03

    申请号：US17709942

    申请日：2022-03-31

    Applicant: Meta Platforms Technologies, LLC

    Inventor： Miaomiao XU ,  Brian WHEELWRIGHT ,  Ying GENG

    IPC: G02B27/01 ,  G06T19/00

    Abstract: A head-mounted display (HMD) for improved field of view (FOV) is provided. The head-mounted display (HMD) may include a display element to provide display light. The head-mounted display (HMD) may also include a lens element to provide display light to a user of the head-mounted display (HMD). The head-mounted display (HMD) may further include an optical element comprising at least one waveguide to provide improved central or peripheral field of view (FOV) for the user of head-mounted display (HMD). In some examples, the waveguide may be part of central optics and/or peripheral optics. The waveguide may have a planar waveguide profile or a curved waveguide profile. In some examples, the waveguide may be stacked or may include a graded index (GRIN) layer.

    PHASE PLATE AND FABRICATION METHOD FOR COLOR-SEPARATED LASER BACKLIGHT IN DISPLAY SYSTEMS
    6.
    发明公开
    PHASE PLATE AND FABRICATION METHOD FOR COLOR-SEPARATED LASER BACKLIGHT IN DISPLAY SYSTEMS 审中-公开

    公开(公告)号：US20230244185A1

    公开(公告)日：2023-08-03

    申请号：US18100698

    申请日：2023-01-24

    Applicant: Meta Platforms Technologies, LLC

    Inventor： Wai Sze Tiffany LAM ,  Jian XU ,  Ying GENG ,  Wanli CHI

    IPC: G03H1/04 ,  G03F7/20

    CPC classification number: G03H1/0402 ,  G03F7/70408 ,  G03H2260/12 ,  G03H2223/13

    Abstract: According to examples, a method for phase plate fabrication may be described herein. The method may include providing an interferometer configuration to generate a hologram of a plurality of pinholes. In some examples, the interferometer configuration includes a substrate for photopolymer attachment, a photopolymer having a predetermined thickness, and an exposure mask with a plurality of pinholes. The method may also include exposing the photopolymer with collimated light, via a laser source, through the exposure mask with a plurality of pinholes, wherein the collimated light passes through the exposure mask itself to create a collimated beam, and the plurality of pinholes of the exposure mask to create a spherical wavefront. The collimated beam and the spherical wavefront may help generate the hologram on the photopolymer for use as a phase plate for improved light transmissivity in display systems.

    FRESNEL LENSES WITH REDUCED OPTICAL ARTIFACTS
    8.
    发明公开
    FRESNEL LENSES WITH REDUCED OPTICAL ARTIFACTS 审中-公开

    公开(公告)号：US20230144296A1

    公开(公告)日：2023-05-11

    申请号：US17521446

    申请日：2021-11-08

    Applicant: Meta Platforms Technologies, LLC

    Inventor： Xingzhou TU ,  Brian WHEELWRIGHT ,  Alexander SOHN ,  Weichuan GAO ,  Ying GENG ,  Jacques GOLLIER

    IPC: G02B3/08 ,  G02B27/30

    CPC classification number: G02B3/08 ,  G02B27/30 ,  G02B2003/0093

    Abstract: A system includes a light outputting device configured to output a divergent light. The system also includes a lens configured to convert the divergent light incident thereon from a first side of the lens to a collimated light substantially covering a light receiving region located at a second side of the lens, the lens including a plurality of Fresnel structures formed on at least one of a first lens surface or a second lens surface of the lens. Each Fresnel structure includes a slope facet and a draft facet. At least one of the draft facets is a first type of draft facet configured to not interact with a ray of the divergent light that is non-parallel with the at least one of the draft facets.

    DISPLAY ILLUMINATION USING A GRATING
    9.
    发明申请
    DISPLAY ILLUMINATION USING A GRATING 有权

    公开(公告)号：US20230023995A1

    公开(公告)日：2023-01-26

    申请号：US17838057

    申请日：2022-06-10

    Applicant: Meta Platforms Technologies, LLC

    Inventor： Fenglin PENG ,  Liangyu QIU ,  Ying GENG ,  Tanya MALHOTRA

    IPC: G02B27/01 ,  G02B27/42 ,  G02F1/1362 ,  G02F1/1335 ,  G02F1/13363 ,  G02B27/28

    Abstract: A display assembly includes a light source, a spatial light modulator (SLM) and a grating. The light source is configured to emit illumination light, the SLM is configured to receive the illumination light and reflect at least a portion of the illumination light. The grating is positioned to redirect the illumination light output from the light source toward the SLM, receive at least a portion of the reflected light from the SLM, redirect first light having a first polarization toward the light source, and transmit through the grating second light having a second polarization that is orthogonal to the first polarization. Also disclosed are operations performed by the display assembly.

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