公开(公告)号：US12022054B2

公开(公告)日：2024-06-25

申请号：US17649436

申请日：2022-01-31

Applicant: Meta Platforms Technologies, LLC

Inventor： Afsoon Jamali ,  Yang Zhao ,  Wai Sze Tiffany Lam ,  Lu Lu ,  Douglas Robert Lanman

IPC: H04N13/388 ,  G02F1/01 ,  G09G3/00 ,  H04N13/332 ,  H04N13/398

CPC classification number: H04N13/388 ,  G09G3/003 ,  H04N13/332 ,  H04N13/398 ,  G02F1/0136

Abstract: A volumetric display may include a two-dimensional display; a varifocal optical system configured to receive image light from the two-dimensional display and focus the image light; and at least one processor configured to: control the two-dimensional display to cause a plurality of sub-frames associated with an image frame to be displayed by the display, wherein each sub-frame of the plurality of sub-frames includes a corresponding portion of image data associated with the image frame; and control the varifocal optical system to a corresponding focal state for each respective sub-frame.

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：US12085717B2

公开(公告)日：2024-09-10

申请号：US17672418

申请日：2022-02-15

Applicant: Meta Platforms Technologies, LLC

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

IPC: G02B27/01 ,  F21V8/00

CPC classification number: G02B27/0172 ,  G02B6/0038 ,  G02B6/0053 ,  G02B2027/0118 ,  G02B2027/0123 ,  G02B2027/0178

Abstract: According to examples, a display system may include a wearable eyewear arrangement that may include a lens assembly having a projector to propagate display light associated with an image. The lens assembly may also include a waveguide for propagating the display light to an eyebox. The waveguide may include a combination of a volume Bragg grating (VBG) component and a partial reflective component that are oriented in a pre-determined configuration to reflect or propagate the display light to maximize a coverage in field of view (FOV) at the eyebox, while minimizing at least one of a ghost image or an intercepting optical lines pattern.

公开(公告)号：US11947117B2

公开(公告)日：2024-04-02

申请号：US17496550

申请日：2021-10-07

Applicant: Meta Platforms Technologies, LLC

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

IPC: G02B27/01 ,  F21V8/00 ,  G02B1/11 ,  G02B27/00 ,  G02B27/42 ,  G02B27/44 ,  H04N9/31

CPC classification number: G02B27/0172 ,  G02B1/11 ,  G02B6/0016 ,  G02B6/0026 ,  G02B6/0038 ,  G02B6/005 ,  G02B27/0081 ,  G02B27/4205 ,  G02B27/44 ,  H04N9/3152 ,  G02B2027/0112 ,  G02B2027/0118 ,  G02B2027/012 ,  G02B2027/0123 ,  G02B2027/0138 ,  G02B2027/0174 ,  G02B2027/0178 ,  G02B2027/0187

Abstract: A waveguide display includes a waveguide transparent to visible light, a first volume Bragg grating (VBG) on the waveguide and characterized by a first refractive index modulation, and a second reflection VBG on the waveguide and including a plurality of regions characterized by different respective refractive index modulations. The first reflection VBG is configured to diffract display light in a first wavelength range and a first field of view (FOV) range such that the display light in the first wavelength range and the first FOV range propagates in the waveguide through total internal reflection to the plurality of regions of the second reflection VBG. The plurality of regions of the second reflection VBG are configured to diffract the display light in different respective wavelength ranges within the first wavelength range and the first FOV range.

公开(公告)号：US20240012261A1

公开(公告)日：2024-01-11

申请号：US18062533

申请日：2022-12-06

Applicant: Meta Platforms Technologies, LLC

Inventor： Wai Sze Tiffany Lam ,  Jian Xu ,  Wanli Chi

IPC: G02B27/09 ,  G02B5/18 ,  G02B5/32 ,  G02F1/1335

CPC classification number: G02B27/0944 ,  G02B5/1847 ,  G02B5/32 ,  G02F1/133504

Abstract: A beam expander for a display in an enhanced reality headset is provided. The beam expander includes a first optical element configured to receive a collimated beam input and to provide a first expanded beam in a first direction, and a second optical element configured to receive the first expanded beam in the first direction and to provide a second expanded beam in a second direction to a display for an enhanced reality headset. An enhanced reality headset and a method for making a beam expander therein with the above features are also provided.

公开(公告)号：US20230258938A1

公开(公告)日：2023-08-17

申请号：US17674573

申请日：2022-02-17

Applicant: META PLATFORMS TECHNOLOGIES, LLC

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

IPC: G02B27/01

CPC classification number: G02B27/0172 ,  G02B2027/0116 ,  G02B2027/011 ,  G02B2027/0138

Abstract: According to examples, a display system may include a wearable eyewear arrangement that may include a lens assembly having a projector to propagate display light associated with an image. The lens assembly may also include a waveguide configuration for propagating the display light to an eyebox. The waveguide configuration may include a volume Bragg grating (VBG) component for propagating the display light from a projector to an eyebox. The VBG component may include at least one tilt adjusted grating facilitated by adjustment in an original grating vector (k) direction of a grating by a pre-determined value. The tilt adjusted grating may facilitate to mitigate a rainbow effect observable in a gazing direction of the eyebox. The rainbow effect may be mitigated by modification of a rainbow ghost path away from the gazing direction without affecting propagation of the image pertaining to the display light.

公开(公告)号：US11709358B2

公开(公告)日：2023-07-25

申请号：US17184312

申请日：2021-02-24

Applicant: Meta Platforms Technologies, LLC

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

IPC: G02B27/01 ,  G02B27/14 ,  G06T11/60 ,  A61B3/12 ,  G02B27/42

CPC classification number: G02B27/0103 ,  G02B27/0172 ,  G02B27/4261 ,  G02B2027/0105 ,  G02B2027/0174 ,  G02B2027/0178

Abstract: A waveguide display includes a waveguide and a staircase structure coupled to the waveguide. The waveguide includes a first substrate, a second substrate, and a holographic material layer between the first substrate and the second substrate. The holographic material layer includes a first grating and a second grating. The staircase structure is positioned on top of at least a portion of the first grating but not on top of the second grating. The staircase structure includes an input grating that is on top of the first grating and is configured to couple display light into the waveguide. The first grating is configured to redirect the display light coupled into the waveguide by the input grating towards the second grating.

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：US11885974B2

公开(公告)日：2024-01-30

申请号：US17076879

申请日：2020-10-22

Applicant: Meta Platforms Technologies, LLC

Inventor： Wai Sze Tiffany Lam ,  Ying Geng ,  Scott Charles McEldowney

IPC: G02B27/01 ,  G02B26/08 ,  F21V8/00

CPC classification number: G02B27/0179 ,  G02B6/0016 ,  G02B6/0055 ,  G02B26/0825 ,  G02B27/0172 ,  G02B2027/0178 ,  G02B2027/0187

Abstract: A device is provided. The device includes a waveguide configured to output a first light having a first polarization to a first side of the waveguide and a second light having the first polarization to a second side of the waveguide. The device also includes an optical element assembly disposed at the first side of the waveguide and configured to convert the first light having the first polarization into a third light having a second polarization, and output the third light toward the waveguide. The device further includes a polarizer disposed at the second side of the waveguide and configured to transmit the third light having the second polarization, and block the second light having the first polarization.

公开(公告)号：US11852949B1

公开(公告)日：2023-12-26

申请号：US17176863

申请日：2021-02-16

Applicant: META PLATFORMS TECHNOLOGIES, LLC

Inventor： Lu Lu ,  Wai Sze Tiffany Lam ,  Yusufu Njoni Bamaxam Sulai

IPC: G02F1/29

CPC classification number: G02F1/29 ,  G02F1/294 ,  G02F2202/40 ,  G02F2203/28

Abstract: A hybrid lens is disclosed including optically coupled varifocal lens and adaptive lens. The varifocal lens is configured for varying optical power of the hybrid lens, and an adaptive lens includes a voltage-controlled element for varying optical power of the adaptive lens in coordination with varying the optical power of the varifocal lens and responsive to variation of the optical power of the hybrid lens, for lessening an optical aberration of the hybrid lens. The hybrid lens may be used in head-mounted displays e.g. for lessening a vergence-accommodation conflict.