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：US12147596B1

公开(公告)日：2024-11-19

申请号：US17896679

申请日：2022-08-26

Applicant: Meta Platforms Technologies, LLC

Inventor： Qing Chao ,  Robert Dale Cavin ,  Guillaume Lestoquoy ,  Mohammadhossein Daraeihajitooei ,  Xinqiao Liu ,  Raffaele Capoccia ,  Sascha Hallstein ,  Ziyun Li

IPC: G06F3/01 ,  G06T7/73 ,  G06V10/25 ,  G06V10/60 ,  G06V40/18 ,  H04N5/33

Abstract: An eyebox region is illuminated with a fringe illumination pattern. An event sensor is configured to generate event-signals. Eye motion is determined from the event-signals. Eye-features are extracted from data generated by the event sensors and a predicted gaze vector is generated from the eye-features.

公开(公告)号：US20250028389A1

公开(公告)日：2025-01-23

申请号：US18909167

申请日：2024-10-08

Applicant: Meta Platforms Technologies, LLC

Inventor： Qing Chao ,  Robert Dale Cavin ,  Guillaume Lestoquoy ,  Mohammadhossein Daraeihajitooei ,  Xinqiao Liu ,  Raffaele Capoccia ,  Sascha Hallstein ,  Ziyun Li

IPC: G06F3/01 ,  G06T7/73 ,  G06V10/25 ,  G06V10/60 ,  G06V40/18 ,  H04N5/33

Abstract: Imaging signals are generated in response to image light. Event signals are generated in response to receive the imaging signals from imaging pixels. A Region of Interest (ROI) of the imaging pixels is identified from a spatial concentration of event signals in the ROI of imaging pixels within a time period. An ROI portion of the imaging pixels in the ROI are driven to capture an ROI image frame.

公开(公告)号：US12276796B2

公开(公告)日：2025-04-15

申请号：US18073823

申请日：2022-12-02

Applicant: Meta Platforms Technologies, LLC

Inventor： Hekun Huang ,  Xuan Wang ,  Sascha Hallstein

IPC: G02B27/01 ,  G02B3/00 ,  G02B27/00

Abstract: A head-mounted display device employs light field directional backlighting to provide three-dimensional (3D) pupil steering without mechanical adjustment while maintaining a compact form factor and performance. An example light field directional backlighting unit includes two substantially flat components: an array of light sources and an array of modulators (e.g., a micro lens array (MLA), a stack of transmissive display elements, a pinhole array, and similar ones). By digitally modifying the illumination pattern on the array of light source and pairing to the light field directional backlighting unit to an extra transmissive display element as the main display panel and one or more viewing optical elements, a light field created by the light field directional backlighting unit is moved in three-dimensional (3D) space to correspond to pupil shift without interfering with the display content.

公开(公告)号：US11796804B1

公开(公告)日：2023-10-24

申请号：US17706467

申请日：2022-03-28

Applicant: Meta Platforms Technologies, LLC

Inventor： Robin Sharma ,  Maxwell Parsons ,  Andrew John Ouderkirk ,  Sascha Hallstein

IPC: G02B27/00 ,  G02B27/01 ,  G06F3/01

CPC classification number: G02B27/0093 ,  G02B27/017 ,  G06F3/013

Abstract: Illumination light is emitted from a light source. The illumination light is directed to an eyebox region via a lightguide. Illumination light and visible light beams are incoupled into the lightguide by a tiltable reflector. A tracking signal is generated with a sensor in response to a returning light becoming incident on the sensor.