公开(公告)号：US20240345389A1

公开(公告)日：2024-10-17

申请号：US18608831

申请日：2024-03-18

Applicant: Meta Platforms Technologies, LLC

Inventor： Jian XU ,  Xiang LI ,  Miaomiao XU ,  Xingzhou TU ,  Shaobai LI ,  Xiayu FENG ,  Wanli CHI ,  Wai Sze Tiffany LAM

IPC: G02B27/00

CPC classification number: G02B27/0093 ,  G02B6/0016 ,  G02B6/0036 ,  G02B6/0076

Abstract: A system is provided. The system includes a light source configured to emit a infrared (“IR”) light for illuminating an object. The system also includes a waveguide imaging assembly including a waveguide, an in-coupling element disposed at a first portion of the waveguide, an out-coupling element disposed at a second portion of the waveguide, and an optical sensor disposed facing the out-coupling element. The in-coupling element is configured to couple the IR light reflected by the object into the waveguide, the waveguide is configured to guide the IR light to propagate toward the out-coupling element through total internal reflection, and the out-coupling element is configured to couple the IR light out of the waveguide toward the optical sensor. The optical sensor is configured to generate a tracking signal of the object based on the IR light output from the waveguide.

公开(公告)号：US20230244023A1

公开(公告)日：2023-08-03

申请号：US18128497

申请日：2023-03-30

Applicant: Meta Platforms Technologies, LLC

Inventor： Jian XU ,  Xingzhou TU ,  Ying GENG ,  Jacques GOLLIER

IPC: F21V8/00 ,  G02B27/01 ,  G02F1/1335 ,  G03F7/20

CPC classification number: G02B6/005 ,  G02B27/0172 ,  G02F1/133514 ,  G03F7/70191 ,  G02B6/0066 ,  G02F1/133528 ,  G02F2201/52 ,  G02B2027/0112

Abstract: According to examples, a phase plate may include a transparent substrate and a photopolymer layer attached to the transparent substrate. The photopolymer layer may adjust a backlight via a phase adjustment and focusing. The phase plate may focus a plurality of red, green, and blue components of the backlight onto respective red, green, and blue subpixels of a thin-film-transistor (TFT) layer deposited thereon. A distance between the photopolymer layer of the phase plate and the plurality of red, green, and blue subpixels of the thin-film-transistor (TFT) layer may be in a range from about 200 μm to about 500 μm. In some examples, the phase plate may be part of a liquid crystal display (LCD) apparatus along with a red, green, blue (RGB) laser to provide backlight; a grating light guide to transmit the backlight; and a liquid crystal display (LCD) layer on the thin-film-transistor (TFT) layer.

公开(公告)号：US20220317624A1

公开(公告)日：2022-10-06

申请号：US17217249

申请日：2021-03-30

Applicant: Meta Platforms Technologies, LLC

Inventor： Xingzhou TU ,  Yun-Han LEE ,  Mengfei WANG ,  Stephen CHOI ,  Lu LU

IPC: G03H1/04 ,  G02B5/18 ,  G02F1/1337 ,  G03H1/02

Abstract: A system includes a light outputting element configured to output a first beam propagating toward a beam interference zone from a first side of the beam interference zone. The system also includes a reflective assembly configured to reflect the first beam back as a second beam propagating toward the beam interference zone from a second side of the beam interference zone. The first beam and the second beam interfere with one another within the beam interference zone to generate a polarization interference pattern.

公开(公告)号：US20240231103A1

公开(公告)日：2024-07-11

申请号：US18440252

申请日：2024-02-13

Applicant: Meta Platforms Technologies, LLC

Inventor： Miaomiao XU ,  Xingzhou TU

IPC: G02B27/01 ,  G02B27/00

CPC classification number: G02B27/0172 ,  G02B27/0018 ,  G02B27/0081 ,  G02B2027/014 ,  G02B2027/0178

Abstract: Techniques disclosed herein relate to waveguide-based near-eye display systems and techniques for analyzing the waveguide-based near-eye display systems using three-dimensional (3-D) k-vectors (wave vectors) in 3-D k-sphere. In one example, a geometrical waveguide display may include a substrate and a first plurality of transflective mirrors in the substrate, the first plurality of transflective mirrors characterized by a tilt angle of n×180°/N with respect to a surface of the substrate, where N is an odd number and n is an integer smaller than N.

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.

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.