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:
Jul. 16, 2024
Filed:
Dec. 09, 2022
Meta Platforms Technologies, Llc, Menlo Park, CA (US);
Chulwoo Oh, Sammamish, WA (US);
Hsien-Hui Cheng, Woodinville, WA (US);
Xiaoze Ou, Mountain View, CA (US);
Linghui Rao, Redmond, WA (US);
META PLATFORMS TECHNOLOGIES, LLC, Menlo Park, CA (US);
Abstract
A switchable waveplate includes a substrate, a first electrode layer on the substrate, an alignment layer on the first electrode layer and including alignment patterns formed thereon, a liquid crystal layer on the alignment layer, and a second electrode layer on the liquid crystal layer. The alignment patterns are determined based on angles of interest at a plurality of regions of the switchable waveplate. The liquid crystal layer includes liquid crystal molecules that are arranged according to the alignment patterns and are pre-tilted when no electric field is applied to the liquid crystal layer. The first electrode layer and the second electrode layer are configured to apply electric fields of different magnitudes to a plurality of zones of the switchable waveplate.