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：US20230393400A1

公开(公告)日：2023-12-07

申请号：US17832081

申请日：2022-06-03

Applicant: Meta Platforms Technologies, LLC

Inventor： Mohamed Tarek Ahmed El-Haddad ,  Yang Yang ,  Francesco Larocca ,  Robin Sharma

IPC: G02B27/01 ,  G02B27/00

CPC classification number: G02B27/0172 ,  G02B27/0093 ,  G02B2027/0174 ,  G02B2027/0178

Abstract: A near-eye imaging system includes a light source, a waveguide, a scanner, and a sensor. The light source is configured to emit light. The waveguide includes an output coupler. The scanner is configured to direct the light to the output coupler at varying scan angles. The waveguide confines the light to guide the light to the output coupler. The output coupler has negative optical power and is configured to direct the light to exit the waveguide as expanding illumination light toward an eyebox region. The sensor is configured to generate a tracking signal in response to returning light incident on the sensor via the scanner and via the output coupler.

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：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：US12282182B2

公开(公告)日：2025-04-22

申请号：US18063913

申请日：2022-12-09

Applicant: Meta Platforms Technologies, LLC

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

IPC: F21V8/00 ,  G02B27/01 ,  G06F1/16

Abstract: A waveguide display system include a waveguide, an input coupler configured to couple display light into the waveguide, a first pupil expander, and a second pupil expander. The first pupil expander is configured to deflect, at a first plurality of locations along a first direction, the display light towards the second pupil expander. The second pupil expander is configured to deflect, at a second plurality of locations along a second direction different from the first direction, the display light from the first pupil expander towards an eyebox of the waveguide display system. At least one of the input coupler, the first pupil expander, or the second pupil expander includes transflective mirrors that are tilted within the waveguide such that the transflective mirrors are inconspicuous when viewed from an oblique angle.

公开(公告)号：US12093450B2

公开(公告)日：2024-09-17

申请号：US17972908

申请日：2022-10-25

Applicant: Meta Platforms Technologies, LLC

Inventor： Mohamed Tarek Ahmed El-Haddad ,  Babak Amirsolaimani ,  Francesco Larocca ,  Yang Yang ,  Junjie Hu

IPC: G06F3/01 ,  G02B27/01

CPC classification number: G06F3/013 ,  G02B27/0172 ,  G02B2027/0174 ,  G02B2027/0178

Abstract: Image light is generated with a display light source. The image light is visible. An infrared light source emits infrared light. A scan directs the image light and the infrared light to an input coupler of a display waveguide and the display waveguide presents the image light to an eyebox region as a virtual image.

公开(公告)号：US20240231479A9

公开(公告)日：2024-07-11

申请号：US17972908

申请日：2022-10-25

Applicant: Meta Platforms Technologies, LLC

Inventor： Mohamed Tarek Ahmed El-Haddad ,  Babak Amirsolaimani ,  Francesco Larocca ,  Yang Yang ,  Junjie Hu

IPC: G06F3/01 ,  G02B27/01

CPC classification number: G06F3/013 ,  G02B27/0172 ,  G02B2027/0174 ,  G02B2027/0178

Abstract: Image light is generated with a display light source. The image light is visible. An infrared light source emits infrared light. A scan directs the image light and the infrared light to an input coupler of a display waveguide and the display waveguide presents the image light to an eyebox region as a virtual image.

公开(公告)号：US11846774B2

公开(公告)日：2023-12-19

申请号：US17697592

申请日：2022-03-17

Applicant: Meta Platforms Technologies, LLC

Inventor： Sihui He ,  Jacques Gollier ,  Maxwell Parsons ,  Babak Amirsolaimani ,  Wanli Chi ,  Daniel Guenther Greif ,  Renate Eva Klementine Landig ,  Xiayu Feng ,  Zhimin Shi ,  Nicholas John Diorio ,  Yang Yang ,  Giuseppe Calafiore ,  Fenglin Peng ,  Tanya Malhotra ,  Andrew John Ouderkirk

IPC: G02B27/00 ,  G02B27/01 ,  G06F3/01 ,  G02F1/29 ,  F21V8/00 ,  G02B6/35 ,  G02F1/1335 ,  G09G3/00 ,  G09G3/34 ,  G06T7/246 ,  H04N23/56 ,  G02F1/335 ,  G03H1/02 ,  G06F1/16 ,  H04N23/698 ,  G01B11/22 ,  G01S7/4865 ,  G01S17/10 ,  G02B27/42 ,  G02F1/33 ,  G06T3/40 ,  G02B27/44 ,  G02B26/08 ,  H04N23/10

CPC classification number: G02B27/0093 ,  G01B11/22 ,  G01S7/4865 ,  G01S17/10 ,  G02B6/005 ,  G02B6/0016 ,  G02B6/0031 ,  G02B6/0035 ,  G02B6/0066 ,  G02B6/3518 ,  G02B26/0816 ,  G02B27/0081 ,  G02B27/0172 ,  G02B27/0179 ,  G02B27/4205 ,  G02B27/44 ,  G02F1/133504 ,  G02F1/133526 ,  G02F1/292 ,  G02F1/294 ,  G02F1/33 ,  G02F1/335 ,  G03H1/0248 ,  G06F1/163 ,  G06F3/013 ,  G06T3/4038 ,  G06T7/246 ,  G09G3/002 ,  G09G3/3413 ,  H04N23/56 ,  H04N23/698 ,  G02B2027/0105 ,  G02B2027/0138 ,  G02B2027/0174 ,  G02B2027/0178 ,  G02B2027/0187 ,  G06T2207/30201 ,  G09G2310/0235 ,  H04N23/10

Abstract: A pupil-replicating lightguide includes a slab of transparent material, a switchable out-coupling grating for out-coupling portions of image light to propagate towards an eyebox, and a switchable tracking grating for redirecting tracking light carrying an eye image towards an eye tracking camera. One of the two gratings may be turned ON while the other is turned OFF, in a time-sequential manner, allowing the combined use of the pupil-replicating lightguide for carrying image light and eye tracking light.