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    PHASE PLATE AND FABRICATION METHOD FOR COLOR-SEPARATED LASER BACKLIGHT IN DISPLAY SYSTEMS
    3.
    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.

    KALEIDOSCOPIC WAVEGUIDE AS SMALL-FORM-FACTOR PUPIL EXPANDER
    4.
    发明公开
    KALEIDOSCOPIC WAVEGUIDE AS SMALL-FORM-FACTOR PUPIL EXPANDER 审中-公开

    公开(公告)号：US20240168299A1

    公开(公告)日：2024-05-23

    申请号：US18518357

    申请日：2023-11-22

    Applicant: Meta Platforms Technologies, LLC

    Inventor： Xingzhou TU ,  Wai Sze Tiffany LAM ,  Wanli CHI ,  Miaomiao XU

    IPC: G02B27/01

    CPC classification number: G02B27/0172 ,  G02B2027/0123

    Abstract: A waveguide display includes a first waveguide assembly and a second waveguide assembly. The first waveguide assembly includes a first waveguide extending in a first direction, a first input coupler configured to couple display light into the first waveguide such that the display light is reflected through total internal reflection by three or more surfaces of the first waveguide that are parallel to the first direction to propagate within the first waveguide in the first direction, and a first output coupler configured to couple the display light out of the first waveguide at a first plurality of locations along the first direction. The second waveguide assembly is configured to deflect, at a second plurality of locations along a second direction different from the first direction, the display light from the first waveguide towards an eyebox of the waveguide display.

    LIGHT GUIDE ILLUMINATION ASSEMBLY FOR PROVIDING INCREASED CONTRAST
    9.
    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.

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