公开(公告)号：US20240094568A1

公开(公告)日：2024-03-21

申请号：US18135020

申请日：2023-04-14

Applicant: Meta Platforms Technologies, LLC

Inventor： Sundeep Kumar Jolly ,  Sihui He

IPC: G02F1/035 ,  G02F1/00 ,  G02F1/03

CPC classification number: G02F1/035 ,  G02F1/0072 ,  G02F1/0327

Abstract: A leaky-mode acousto-optical modulator may be used to generate visual images suitable for direct viewing, without image-forming optics. To extend a field of view of the modulator to limits suitable for visual displays, an array of acoustic transducers is coupled to a waveguide along its length. Each acoustic transducer generates an acoustic wave causing a corresponding leaky mode to appear. A reflector is disposed proximate each transducer for directing the out-coupled light portion at a unique angle, providing a corresponding field of view portion for that direction. The field of view portions coalesce into a continuous synthetic field of view suitable for wide-angle visual display applications.

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.

公开(公告)号：US20230367125A1

公开(公告)日：2023-11-16

申请号：US18124445

申请日：2023-03-21

Applicant: Meta Platforms Technologies, LLC

Inventor： Xiayu Feng ,  Sihui He

IPC: G02B27/01 ,  G02B27/28 ,  G02F1/01

CPC classification number: G02B27/0172 ,  G02B27/281 ,  G02F1/0136 ,  G02B6/005

Abstract: A near-eye display includes a first polarizer in a path of external light to an eyebox of the display for polarizing the external light to a first polarization state. A see-through lightguide is disposed in the path between the first polarizer and the eyebox for conveying image light to the eyebox in a second, orthogonal polarization state while transmitting the external light in the first polarization state. A second polarizer is disposed in the path downstream of the see-through lightguide for adjusting a power balance of the external light and the image light at the eyebox.