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.