公开(公告)号：US20230161217A1

公开(公告)日：2023-05-25

申请号：US17535502

申请日：2021-11-24

Applicant: Meta Platforms Technologies, LLC

Inventor： Xiayu FENG ,  Sihui HE ,  Zhexin ZHAO ,  Lu LU

IPC: G02F1/29 ,  G02B27/01

CPC classification number: G02F1/292 ,  G02B27/0172 ,  G02B2027/014 ,  G02B2027/0178

Abstract: A device includes a light guide and an in-coupling element coupled with the light guide and configured to couple an input image light into the light guide. The device also includes an out-coupling element coupled with the light guide and configured to couple the input image light out of the light guide as an output image light, and a controller configured to control at least one of the in-coupling element or the out-coupling element during a first time period and a second time period. The out-coupling element outputs a first output image light having a first field of view (“FOV”) during the first time period, and a second output image light having a second FOV during the second time period. The first FOV substantially overlaps with the second FOV, and an axis of symmetry of the first FOV is rotated relative to an axis of symmetry of the second FOV.

公开(公告)号：US20230161093A1

公开(公告)日：2023-05-25

申请号：US17535450

申请日：2021-11-24

Applicant: Meta Platforms Technologies, LLC

Inventor： Xiayu FENG ,  Sihui HE ,  Zhexin ZHAO ,  Lu LU

IPC: F21V8/00 ,  G02B27/01 ,  G02B6/34

CPC classification number: G02B6/0016 ,  G02B27/0172 ,  G02B6/34 ,  G02B6/0038

Abstract: A device includes a light guide. The device also includes an in-coupling element coupled with the light guide and configured to couple a first image light into the light guide as a second image light propagating inside the light guide via total internal reflection (“TIR”), and to couple a portion of the second image light out of the light guide as a third image light. The device further includes a recycling element coupled with the light guide and configured to couple the third image light back into the light guide as a fourth image light propagating inside the light guide via TIR.

公开(公告)号：US20230258950A1

公开(公告)日：2023-08-17

申请号：US18154038

申请日：2023-01-12

Applicant: Meta Platforms Technologies, LLC

Inventor： Wanli CHI ,  Sihui HE ,  Ying GENG ,  Maxwell PARSONS

IPC: G02B27/09 ,  G02B27/00

CPC classification number: G02B27/0938 ,  G02B27/0093 ,  G02B6/0016

Abstract: A device includes a light source configured to output a first beam, and a light guide coupled with an in-coupling element and an out-coupling element. The device includes a display panel and a lens assembly disposed at opposite sides of the light guide. The in-coupling element is configured to couple the first beam into the light guide as a second beam. The out-coupling element is configured to couple a first portion of the second beam out of the light guide as a third beam propagating toward the display panel to illuminate the display panel, and couple a second portion of the second beam out of the light guide as a fourth beam propagating toward the lens assembly. A normal of a surface of the light guide where the out-coupling element is disposed is tilted by a predetermined angle with respect to an axis of the display panel.