公开(公告)号：US20230204967A1

公开(公告)日：2023-06-29

申请号：US17850663

申请日：2022-06-27

Applicant: Meta Platforms Technologies, LLC

Inventor： Yang Yang ,  Jianbo Zhao ,  Peter Johnsen

IPC: G02B27/01 ,  G02B6/42

CPC classification number: G02B27/0179 ,  G02B6/42 ,  G02B6/4214 ,  G02B27/0172 ,  G02B2027/0174 ,  G02B2027/0178 ,  G02B2027/0187

Abstract: An apparatus, system, and method for a waveguide system may be used to support eye tracking in a head mounted display (HMD). The waveguide system may be positioned in a user’s field of view and within a lens assembly of the HMD to capture light that is reflected from an eye. The waveguide system may have a number of multi-directional gratings configured to direct light to an out-coupling grating. The multi-directional gratings include first and second in-coupling diffraction gratings disposed in a waveguide. The first and second in-coupling diffraction gratings are oriented to direct incident light in multiple directions within the waveguide towards the out-coupling diffraction grating.

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：US12196976B2

公开(公告)日：2025-01-14

申请号：US17850663

申请日：2022-06-27

Applicant: Meta Platforms Technologies, LLC

Inventor： Yang Yang ,  Jianbo Zhao ,  Peter Johnsen

IPC: G02B27/01 ,  G02B6/42

Abstract: An apparatus, system, and method for a waveguide system may be used to support eye tracking in a head mounted display (HMD). The waveguide system may be positioned in a user's field of view and within a lens assembly of the HMD to capture light that is reflected from an eye. The waveguide system may have a number of multi-directional gratings configured to direct light to an out-coupling grating. The multi-directional gratings include first and second in-coupling diffraction gratings disposed in a waveguide. The first and second in-coupling diffraction gratings are oriented to direct incident light in multiple directions within the waveguide towards the out-coupling diffraction grating.

公开(公告)号：US20230204959A1

公开(公告)日：2023-06-29

申请号：US17830339

申请日：2022-06-02

Applicant: Meta Platforms Technologies, LLC

Inventor： Yang Yang ,  Sascha Hallstein ,  Jianbo Zhao ,  Peter Johnsen

IPC: G02B27/01

CPC classification number: G02B27/0172 ,  G02B2027/0125 ,  G02B2027/0174

Abstract: An apparatus, system, and method for a waveguide system may be used to support eye tracking in a head mounted display (HMD). The waveguide system may be positioned in a user’s field of view and within a lens assembly of the HMD to capture light that is reflected from an eye. The waveguide system may include a waveguide, a first diffraction grating, and a second diffraction grating. The first diffraction grating may be configured to in-couple light of a first wavelength into the waveguide, and the second diffraction grating may be configured to in-couple light of a second wavelength. The first and second diffraction gratings operate together to detect light reflections from an eyebox region.

公开(公告)号：US20250116866A1

公开(公告)日：2025-04-10

申请号：US18768711

申请日：2024-07-10

Applicant: Meta Platforms Technologies, LLC

Inventor： Jianbo Zhao ,  Pei Xiong ,  Yu Shi ,  Miaomiao Xu ,  Babak Amirsolaimani

IPC: G02B27/01 ,  G02B6/42 ,  G06F1/16

Abstract: A waveguide for a display system includes a waveguide body extending from an input end to an output end and configured to guide light by total internal reflection from the input end to the output end, a first array of partial reflectors disposed within a first strata of the waveguide body, and a second array of partial reflectors disposed within a second strata of the waveguide body overlying the first strata.

公开(公告)号：US20230205312A1

公开(公告)日：2023-06-29

申请号：US17730054

申请日：2022-04-26

Applicant: Meta Platforms Technologies, LLC

Inventor： Yang Yang ,  Jianbo Zhao ,  Peter Johnsen

IPC: G06F3/01 ,  G02B6/42 ,  G02B27/01

CPC classification number: G06F3/013 ,  G02B6/42 ,  G02B6/4206 ,  G02B27/0172 ,  G02B2027/0138

Abstract: An apparatus, system, and method for a waveguide system may be used to support eye tracking in a head mounted display. The waveguide system may be positioned in a user's field of view and within a lens assembly of an HMD to capture light that is reflected from an eye. The waveguide system may include a waveguide, a first diffraction grating, and a second diffraction grating. The first diffraction grating may be configured to in-couple light into the waveguide from an eyebox region. The first diffraction grating may be a rolled diffraction grating having slanted grating planes that receive light from a larger surface area and direct the light onto a smaller surface area. The second diffraction grating may receive the light from the first diffraction grating in the waveguide and may be configured to out-couple the light from the waveguide onto an image sensor.