The patent badge is an abbreviated version of the USPTO patent document. The patent badge does contain a link to the full patent document.
The patent badge is an abbreviated version of the USPTO patent document. The patent badge covers the following: Patent number, Date patent was issued, Date patent was filed, Title of the patent, Applicant, Inventor, Assignee, Attorney firm, Primary examiner, Assistant examiner, CPCs, and Abstract. The patent badge does contain a link to the full patent document (in Adobe Acrobat format, aka pdf). To download or print any patent click here.
Patent No.:
Date of Patent:
May. 30, 2023
Filed:
Dec. 17, 2020
Applicant:
Meta Platforms Technologies, Llc, Menlo Park, CA (US);
Inventors:
Assignee:
META PLATFORMS TECHNOLOGIES, LLC, Menlo Park, CA (US);
Primary Examiner:
Int. Cl.
CPC ...
G02B 27/01 (2006.01); G02B 6/34 (2006.01);
U.S. Cl.
CPC ...
G02B 27/0172 (2013.01); G02B 6/34 (2013.01); G02B 2027/0178 (2013.01);
Abstract
A waveguide display includes a waveguide, an input coupler configured to couple display light into the waveguide, and a surface-relief grating on the waveguide and configured to couple the display light out of the waveguide towards an eyebox of the waveguide display on a first side of the waveguide. The surface-relief grating is formed in a plurality of grating layers having uniform or non-uniform thickness profiles. The plurality of grating layers is characterized by a refractive index modulation that increases and then decreases as the distance of the grating layer from the waveguide increases.