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：US20230213761A1

公开(公告)日：2023-07-06

申请号：US17569349

申请日：2022-01-05

Applicant: Meta Platforms Technologies, LLC

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

IPC: G02B27/00 ,  G02B27/01 ,  G02B27/42 ,  F21V8/00 ,  G02C5/14 ,  G02C11/00

CPC classification number: G02B27/0037 ,  G02B6/005 ,  G02B6/0023 ,  G02B27/0172 ,  G02B27/4205 ,  G02C5/14 ,  G02C11/10 ,  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, in which the waveguide may include a plurality of gratings through which the first display light is sequentially propagated and in which at least one of the plurality of gratings is oriented to propagate the display light to a next grating while reducing an appearance of a ghost image of the image on the eyebox.

公开(公告)号：US12271078B2

公开(公告)日：2025-04-08

申请号：US17985063

申请日：2022-11-10

Applicant: Meta Platforms Technologies, LLC

Inventor： Zhimin Shi ,  James Ronald Bonar ,  Wanli Chi

IPC: G02F1/13357 ,  G02B27/01

Abstract: Embodiments of the present disclosure relate to a high performance backlight device with photonic integrated circuits. The backlight device includes a light source assembly, a multi-mode slab waveguide, and an out-coupling assembly. The light source assembly includes one or more light sources that generate light in accordance with emission instructions, and a de-speckling mechanism that conditions the generated light to mitigate speckle. The multi-mode slab waveguide in-couples the conditioned light and expands the in-coupled conditioned light in two dimensions to form a homogenous area of conditioned light within a region of the multi-mode slab waveguide. The out-coupling assembly out-couples the conditioned light from the region in a direction normal to the two dimensions, wherein a light modulation layer forms an image from the out-coupled conditioned light.

公开(公告)号：US20250085558A1

公开(公告)日：2025-03-13

申请号：US18955754

申请日：2024-11-21

Applicant: Meta Platforms Technologies, LLC

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

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

Abstract: A headset for enhanced reality applications comprises a light source to provide a collimated beam and a beam expander. The beam expander includes a first optical element that receives the collimated beam and provides a first expanded beam in a first direction, a second optical element that receives the first expanded beam in the first direction and provides a second expanded beam in a second direction, and a display. The display includes a liquid crystal layer to receive the second expanded beam and a pixelated electrode layer to activate a selected portion of the liquid crystal layer and provide a pixelated image to a user of the headset.

公开(公告)号：US20250035928A1

公开(公告)日：2025-01-30

申请号：US18677206

申请日：2024-05-29

Applicant: Meta Platforms Technologies, LLC

Inventor： Wai Sze Tiffany Lam ,  Wanli Chi ,  Marvin Dion Alim ,  Alexander Sohn ,  Jacques Gollier

IPC: G02B27/01 ,  G02B5/30

Abstract: A system comprising (1) an eyewear device dimensioned to be worn by a user and (2) a compact beam expander incorporated in the eyewear device, the compact beam expander comprising (A) a first light-spreading element configured to diffract light received from a light source, (B) a second light-spreading element configured to further diffract the light, and (C) a pixel element that is positioned proximate to the second light-spreading element and configured to direct the light toward a lens that focuses the light for an eye of the user. Various other apparatuses, systems, and methods are also disclosed.

公开(公告)号：US12189134B2

公开(公告)日：2025-01-07

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

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：US20240288684A1

公开(公告)日：2024-08-29

申请号：US18587339

申请日：2024-02-26

Applicant: Meta Platforms Technologies, LLC

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

IPC: G02B26/10 ,  G02B5/18 ,  G02B27/01 ,  G02B27/09 ,  G02B27/44 ,  G06T19/00

CPC classification number: G02B26/106 ,  G02B5/18 ,  G02B27/0172 ,  G02B27/0944 ,  G02B27/44 ,  G06T19/006

Abstract: An apparatus of the subject technology includes a light source to generate a light beam, a first grating illuminated by the light beam, and a second grating optically coupled to the first grating. The first grating performs a first diffraction to expand the light beam in a first dimension to form a first beam. The second grating performs a second diffraction to expand the first beam in a second dimension to provide a backlight for a display device.