公开(公告)号：US11768330B2

公开(公告)日：2023-09-26

申请号：US17485064

申请日：2021-09-24

Applicant: Meta Platforms Technologies, LLC

Inventor： Miaomiao Xu ,  Brian Wheelwright ,  Ying Geng

IPC: G02B6/293 ,  G02B27/01 ,  G02B27/30

CPC classification number: G02B6/29301 ,  G02B27/0101 ,  G02B27/0172 ,  G02B27/30 ,  G02B2027/0123

Abstract: A device includes an array of light emitters configured to generate multiple light beams to form an image, the image having a field of view and a planar waveguide having an edge configured to receive multiple light beams from the array of light emitters, each light beam associated with a portion of the field of view. The device also includes a lens array comprising multiple lenses linearly extended to overlap an edge portion of the planar waveguide, the lenses optically coupling the light beams into the planar waveguide, and one or more output couplers in the planar waveguide configured to direct the light beams into an eyebox, wherein the eyebox forms an area that includes a pupil of a viewer of the image.

公开(公告)号：US20250060523A1

公开(公告)日：2025-02-20

申请号：US18802924

申请日：2024-08-13

Applicant: Meta Platforms Technologies, LLC

Inventor： Jianbo Zhao ,  Miaomiao Xu ,  Pei Xiong ,  Yu Shi ,  Hee Yoon Lee

IPC: F21V8/00 ,  G02B13/00 ,  G02B27/01

Abstract: The disclosed method may include providing, by a folding mirror region of a waveguide, two or more paths for light rays from an input mirror of the waveguide to an eye box of the waveguide. The method may also include supporting, by an output mirror of the waveguide, a field of view of at least sixty degrees by at least fifty degrees. The waveguide may correspond to a two-dimensional geometrical waveguide and the folding mirror region may fit entirely within a lens shape of the waveguide. Various other methods, systems, and computer-readable media are also disclosed.

公开(公告)号：US20230367073A1

公开(公告)日：2023-11-16

申请号：US18076236

申请日：2022-12-06

Applicant: Meta Platforms Technologies, LLC

Inventor： Renate Eva Klementine Landig ,  Sihui He ,  Miaomiao Xu

IPC: G02B6/293 ,  F21V8/00

CPC classification number: G02B6/29395 ,  G02B6/0016

Abstract: A waveguide for conveying image light in a display device is disclosed. The waveguide comprises a waveguide body, an input coupler configured to couple the image light into the waveguide body for propagating the image light within the waveguide body along a zigzag light path, and a plurality of slanted bulk mirrors disposed along the zigzag light path within the waveguide body and having a tunable reflectivity parameter for controlling a spatial distribution of image light portions out-coupled from the waveguide body by the plurality of slanted bulk mirrors. The waveguide may include a plurality of slanted polarization-selective bulk mirrors, and a liquid crystal layer configured to alter the polarization of the image light, the liquid crystal layer being disposed between a backplane electrode and a pixelated electrode configured to control the liquid crystal layer by application of a spatially-varying voltage profile.

公开(公告)号：US12099190B2

公开(公告)日：2024-09-24

申请号：US17549394

申请日：2021-12-13

Applicant: Meta Platforms Technologies, LLC

Inventor： Sihui He ,  Maxwell Parsons ,  Fenglin Peng ,  Miaomiao Xu ,  Yang Yang ,  Yu Shi ,  Dianmin Lin

IPC: G02B27/01 ,  G02B5/18 ,  G02B5/32 ,  G02B6/42 ,  G02B27/00 ,  F21V8/00

CPC classification number: G02B27/0172 ,  G02B5/1842 ,  G02B5/32 ,  G02B6/4206 ,  G02B6/4213 ,  G02B27/0081 ,  G02B6/0018 ,  G02B6/0036 ,  G02B2027/0174 ,  G02B2027/0178

Abstract: A waveguide is provided. The waveguide includes a substrate having two outer surfaces for propagating a beam of light in the substrate by reflecting the beam from the two outer surfaces. The waveguide includes at least one polarization volume hologram (PVH) grating to couple light in and/or out of the waveguide. The PVH grating may be a multi-layer PVH grating with graded birefringence.

公开(公告)号：US20240231093A1

公开(公告)日：2024-07-11

申请号：US18094807

申请日：2023-01-09

Applicant: Meta Platforms Technologies, LLC

Inventor： Robin Sharma ,  Miaomiao Xu ,  Andrew Maimone ,  Scott Charles McEldowney

IPC: G02B27/01 ,  F21V8/00

CPC classification number: G02B27/0172 ,  G02B6/0016 ,  G02B6/0036 ,  G02B6/005 ,  G02B2027/0174

Abstract: A light field display is composed of a light source assembly (LSA), a collimating lens, an incoupling section, a spatial light modulator (SLM), and gratings. The LSA includes point light sources that emit light at different time periods. The collimating lens collimates light from the point light sources. The incoupling section incouples the collimated light to a waveguide. The SLM spatially modulates the collimated light. The gratings outcouple spatially modulated light from the waveguide, and for any given point light source of the point light sources, the given point light source has a respective corresponding grating of the gratings that outcouples from the waveguide light that originated from the given point light source. The spatially modulated light output in each time period forms a respective virtual emitter in an eyebox, and over the different time periods the virtual emitters in aggregate form at least one virtual object.

公开(公告)号：US20240210611A1

公开(公告)日：2024-06-27

申请号：US18371780

申请日：2023-09-22

Applicant: Meta Platforms Technologies, LLC

Inventor： Miaomiao Xu ,  Ying Geng ,  Sheng Ye ,  Andrew John Ouderkirk ,  Liliana Ruiz Diaz ,  Zhaoyu Nie

IPC: F21V8/00 ,  G02B27/01

CPC classification number: G02B6/0055 ,  G02B27/0172 ,  G02B2027/0178

Abstract: A lightguide with partially reflective slanted polarization-selective bulk mirrors is disclosed. The lightguide may be used in a near-eye display with a polarized image source. The polarization-selective bulk mirrors reflect light of the polarized image source, and fully transmit light of the orthogonal polarization, causing the mirrors to be less conspicuous to an external viewer while preserving high efficiency of delivery of the image light to the viewer.

公开(公告)号：US12259553B2

公开(公告)日：2025-03-25

申请号：US17666227

申请日：2022-02-07

Applicant: META PLATFORMS TECHNOLOGIES, LLC

Inventor： Miaomiao Xu ,  Brian Wheelwright ,  Fenglin Peng ,  Ying Geng ,  Changwon Jang ,  Maxwell Parsons ,  Sihui He ,  Jacques Gollier

IPC: G02B27/01 ,  G02B27/14 ,  G02B27/28

Abstract: An illuminator for illuminating a display panel includes a lightguide with an array of buried slanted bulk reflectors that out-couple portions of the light beam propagating in the lightguide through one of the lightguide surfaces. Polarization beam-splitting slanted surfaces may be used to provide polarized output. Such an illuminator may be used with a reflective display panel operating by polarization. The beam-splitting slanted surfaces operate as a polarizer, providing polarized illuminating light. The light reflected by the reflective panel may propagate back through the illuminator, and the polarization beam-splitting slanted surfaces may operate also as analyzer.

公开(公告)号：US20240094552A1

公开(公告)日：2024-03-21

申请号：US18171944

申请日：2023-02-21

Applicant: Meta Platforms Technologies, LLC

Inventor： Miaomiao Xu ,  Wanli Chi ,  Alexander Sohn

IPC: G02B27/10 ,  G02B6/28 ,  G02B27/01

CPC classification number: G02B27/106 ,  G02B6/2817 ,  G02B27/0172

Abstract: A waveguide may include a substrate and an array of beam splitters embedded within the substrate, where each beam splitter within the array of beam splitters does not fully transect the substrate. Various other devices, systems, and methods of manufacture are also disclosed.

公开(公告)号：US20230098034A1

公开(公告)日：2023-03-30

申请号：US17485064

申请日：2021-09-24

Applicant: Meta Platforms Technologies, LLC

Inventor： Miaomiao Xu ,  Brian Wheelwright ,  Ying Geng

IPC: G02B6/293 ,  G02B27/01 ,  G02B27/30

Abstract: A device includes an array of light emitters configured to generate multiple light beams to form an image, the image having a field of view and a planar waveguide having an edge configured to receive multiple light beams from the array of light emitters, each light beam associated with a portion of the field of view. The device also includes a lens array comprising multiple lenses linearly extended to overlap an edge portion of the planar waveguide, the lenses optically coupling the light beams into the planar waveguide, and one or more output couplers in the planar waveguide configured to direct the light beams into an eyebox, wherein the eyebox forms an area that includes a pupil of a viewer of the image.

公开(公告)号：US11960088B2

公开(公告)日：2024-04-16

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

CPC classification number: G02B27/0172 ,  G06T19/006 ,  G02B2027/0187

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.