公开(公告)号：US11927758B1

公开(公告)日：2024-03-12

申请号：US17989159

申请日：2022-11-17

Applicant: Meta Platforms Technologies, LLC

Inventor： Wai Sze Tiffany Lam ,  Wanli Chi ,  Dominic Meiser ,  Yang Yang ,  Ningfeng Huang

IPC: G09G5/00 ,  F21V8/00 ,  G02B27/01

CPC classification number: G02B27/0172 ,  G02B6/0035 ,  G02B2027/0112 ,  G02B2027/0125

Abstract: A display system includes a wearable eyewear arrangement with a projector for propagating display light associated with an image and a waveguide for propagating the display light to an eye box. The waveguide includes volume Bragg gratings (VBGs), which may be in groups of three or more gratings with same horizontal period allowing each color to be coupled out from the waveguide by the same type of grating, thus, at the same angle, reducing or eliminating image blurriness and ghost images while allowing a smaller size waveguide. A 100% reflective mirror or mirror array is used for broad spectrum reflection into the waveguide for light input. Selection of two or more wavelengths for each color at the projector provides spectral response matching to the waveguide allowing wider field of view (FOV) coverage for the entire wavelength spectrum.

公开(公告)号：US11860471B2

公开(公告)日：2024-01-02

申请号：US17239023

申请日：2021-04-23

Applicant: Meta Platforms Technologies, LLC

Inventor： Afsoon Jamali ,  Wanli Chi ,  Douglas Robert Lanman

IPC: G02F1/1335 ,  G06T19/00 ,  G06F3/01 ,  G02B27/01 ,  G02B27/00

CPC classification number: G02F1/133526 ,  G02B27/0093 ,  G02B27/0172 ,  G06F3/013 ,  G06T19/006 ,  G02B2027/014

Abstract: A system is provided. The system includes a display configured to output a virtual image. The system also includes a lens assembly optically coupled to the display and including a plurality of optical lenses. The system also includes a controller configured to selectively activate one or more of the plurality of optical lenses, determine a lens center shift between a center of the selectively activated one or more of the plurality of optical lenses and a center of the lens assembly, and determine an image shift based on the lens center shift for shifting the virtual image output from the display.

公开(公告)号：US11733521B2

公开(公告)日：2023-08-22

申请号：US17178016

申请日：2021-02-17

Applicant: Meta Platforms Technologies, LLC

Inventor： Wanli Chi ,  Yang Yang ,  Wai Sze Tiffany Lam ,  Dominic Meiser

IPC: G02B27/01 ,  G02B6/02

CPC classification number: G02B27/0172 ,  G02B6/0208 ,  G02B2027/0123 ,  G02B2027/0174

Abstract: A waveguide display includes a plurality of grating layers, the plurality of grating layers characterized by two or more different base refractive indices and including a set of volume Bragg gratings (VBGs). Each VBG of the set of VBGs is configured to diffract display light in a different respective field-of-view (FOV) and wavelength range. The set of VBGs includes a plurality of groups of VBGs. VBGs in each respective group of the plurality of groups of VBGs are characterized by a same grating period and include at least one VBG in each grating layer of the plurality of grating layers.

公开(公告)号：US11624926B1

公开(公告)日：2023-04-11

申请号：US17569381

申请日：2022-01-05

Applicant: Meta Platforms Technologies, LLC

Inventor： Wai Sze Tiffany Lam ,  Yang Yang ,  Dominic Meiser ,  Wanli Chi

IPC: G02B27/01 ,  G02B27/00

Abstract: According to examples, a display system may include a disparity sensing detector, collection optics, and a first lens assembly. The first lens assembly may include a first projector to output a first display light associated with a first image and a first waveguide for propagating the first display light to the collection optics, in which the collection optics is to direct the first display light to the disparity sensing detector. The display system may also include a second lens assembly including a second projector to output a second display light associated with a second image and a second waveguide for propagating the second display light to the collection optics, in which the collection optics is to direct the second display light to the disparity sensing detector.

公开(公告)号：US11604356B1

公开(公告)日：2023-03-14

申请号：US17461263

申请日：2021-08-30

Applicant: Meta Platforms Technologies, LLC

Inventor： Stephen John Holmes ,  Wanli Chi ,  Maxwell Parsons ,  Jasmine Soria Sears

IPC: G02B27/01 ,  G06F3/00 ,  G06F3/01 ,  G06F1/16 ,  G02B5/30

Abstract: A near-eye display assembly presented herein includes an electronic display, an optical assembly, and scanning assembly. The electronic display has a first resolution. The optical assembly controls a field of view at an eye box and directs a plurality of light rays emitting from the electronic display toward the eye box. The scanning assembly shifts a direction of at least one of the light rays in accordance with emission instructions such that a virtual display is presented to the eye box, the virtual display having a second resolution greater than the first resolution. The display assembly can be implemented as a component of a head-mounted display of an artificial reality system.

公开(公告)号：US11885967B2

公开(公告)日：2024-01-30

申请号：US17478679

申请日：2021-09-17

Applicant: Meta Platforms Technologies, LLC

Inventor： Wai Sze Tiffany Lam ,  Yang Yang ,  Wanli Chi ,  Dominic Meiser

IPC: G02B27/01 ,  G02B27/28 ,  G02B5/30 ,  F21V8/00 ,  G02B5/18 ,  G02B6/34 ,  G02B27/00 ,  G02B27/09

CPC classification number: G02B27/0172 ,  G02B5/1833 ,  G02B5/1842 ,  G02B5/3083 ,  G02B6/005 ,  G02B6/0026 ,  G02B6/34 ,  G02B27/0081 ,  G02B27/0093 ,  G02B27/0944 ,  G02B27/286 ,  G02B2027/0118 ,  G02B2027/0123 ,  G02B2027/0174 ,  G02B2027/0178

Abstract: A waveguide display includes a substrate transparent to visible light, a first grating on the substrate and configured to couple display light into or out of the substrate, and a phase structure on the substrate and configured to change a polarization state of the display light after or before the display light reaches the first grating. The first grating is characterized by a polarization-dependent diffraction efficiency. The first grating includes, for example, a surface-relief grating or a volume Bragg grating.

公开(公告)号：US20230396744A1

公开(公告)日：2023-12-07

申请号：US17834731

申请日：2022-06-07

Applicant: Meta Platforms Technologies, LLC

Inventor： Zhimin Shi ,  Chloe Astrid Marie Fabien ,  Wanli Chi

IPC: H04N9/31 ,  G02B27/01 ,  G02B6/124

CPC classification number: H04N9/3129 ,  G02B27/0172 ,  H04N9/3155 ,  H04N9/3158 ,  G02B6/124

Abstract: A display device may include a projector coupled to volume Bragg grating (VBG) based pupil-replicating lightguide. The projector may be a scanning projector or a display panel based projector. A lighting unit for the display panel may have spatially variant spectral composition selected to match angular and wavelength selectivity of the VBGs of the pupil-replicating lightguide, thereby improving light utilization efficiency of the display device. In scanning projector implementations, the center wavelength of the scanned light beam may be varied in coordination with the scanning, to achieve the same effect.

公开(公告)号：US20230393329A1

公开(公告)日：2023-12-07

申请号：US18188499

申请日：2023-03-23

Applicant: Meta Platforms Technologies, LLC

Inventor： Tingling Rao ,  Andrew John Ouderkirk ,  Xiayu Feng ,  Sihui He ,  Babak Amirsolaimani ,  Wanli Chi ,  Lafe Joseph Purvis, II ,  Jian Xu ,  Zhaocheng Liu

IPC: G02B6/02 ,  G02B6/34 ,  G02B6/42

CPC classification number: G02B6/02038 ,  G02B6/34 ,  G02B6/425

Abstract: An optical element includes a waveguide body that is configured to guide light by total internal reflection from an input end to an output end, an input coupling structure located at the input end for coupling light into the waveguide body, and an output coupling structure located at the output end for coupling light out of the waveguide body, where the waveguide body includes a layer of an optically anisotropic organic solid crystal. Such an optical element may have low weight and exhibit good color uniformity while presenting a 2D diagonal field-of-view of at least approximately 10°.

公开(公告)号：US11822086B2

公开(公告)日：2023-11-21

申请号：US17667504

申请日：2022-02-08

Applicant: Meta Platforms Technologies, LLC

Inventor： Sihui He ,  Wanli Chi ,  Ying Geng ,  Jacques Gollier

IPC: G02B27/00 ,  G02B27/01 ,  F21V8/00 ,  G06F3/01 ,  G06T19/00

CPC classification number: G02B27/0172 ,  G02B6/0016 ,  G02B27/0093 ,  G06F3/013 ,  G02B2027/0138 ,  G06T19/006

Abstract: A see-through illuminator for a reflective display panel provides a better image contrast when the illuminator is configured to direct a leakage light beam exiting the lightguide from a side opposing the display panel to propagate non-parallel to an image light formed by reflection of an illuminating light beam from the display panel. An objective lens may concentrate the image and leakage light beams at different locations, enabling a user's eye placed at a location of the image light beam to see the projected image without interference from the leakage light beam.

公开(公告)号：US11714282B2

公开(公告)日：2023-08-01

申请号：US16506899

申请日：2019-07-09

Applicant: META PLATFORMS TECHNOLOGIES, LLC

Inventor： Wanli Chi ,  Chadwick Brian Martin ,  Scott Charles McEldowney ,  Maxwell Parsons ,  Stephen James McNally ,  Daniel Guenther Greif

IPC: G02B27/01

CPC classification number: G02B27/0172 ,  G02B27/0176 ,  G02B2027/0178

Abstract: A light source includes a first set of source elements and a second set of source elements. A respective set of source elements is disposed on a respective substrate and electrically coupled to a respective set of circuit pads formed on a respective top surface of the respective substrate by respective bond wires. At least a portion of the respective top surfaces face each other and are spaced apart from each other to accommodate at least some of the first set of source elements, at least some of the second set of source elements, and at least some of the bond wires. The display device that includes a light source configured to output image light, an optical assembly configured to collimate the image light, a scanning assembly configured to steer the image light, and an output device configured to output the image light for displaying images is also disclosed.