公开(公告)号：US11796813B2

公开(公告)日：2023-10-24

申请号：US17064567

申请日：2020-10-06

Applicant: Meta Platforms Technologies, LLC

Inventor： Ningfeng Huang ,  Oleg Yaroshchuk ,  Heeyoon Lee ,  Giuseppe Calafiore ,  Barry David Silverstein

IPC: G02B27/01 ,  G02B27/00 ,  F21V8/00 ,  G02B3/00

CPC classification number: G02B27/0172 ,  G02B27/0081 ,  G02B27/0093 ,  G02B3/0006 ,  G02B6/0026 ,  G02B6/0078 ,  G02B2027/0174

Abstract: A system includes one or more waveguides, and a plurality of grating sets coupled with the one or more waveguides. A plurality of combinations of gratings from the grating sets are configurable to direct an image light to propagate through a plurality of sub-eyeboxes forming an uncompressed eyebox. The system also includes a controller configured to selectively configure one or more combinations of gratings to operate in a diffraction state to direct the image light to propagate through one or more sub-eyeboxes forming a compressed eyebox having a size smaller than a size of the uncompressed eyebox.