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:
Jan. 30, 2024
Filed:
Sep. 17, 2021
Meta Platforms Technologies, Llc, Menlo Park, CA (US);
Wai Sze Tiffany Lam, Bothell, WA (US);
Yang Yang, Redmond, WA (US);
Wanli Chi, Sammamish, WA (US);
Dominic Meiser, Bothell, WA (US);
META PLATFORMS TECHNOLOGIES, LLC, Menlo Park, CA (US);
Abstract
A waveguide display includes a substrate transparent to visible light, a first grating on the substrate and configured to couple display light into or out of the substrate, and a phase structure on the substrate and configured to change a polarization state of the display light after or before the display light reaches the first grating. The first grating is characterized by a polarization-dependent diffraction efficiency. The first grating includes, for example, a surface-relief grating or a volume Bragg grating.