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. 14, 2020
Filed:
Sep. 18, 2018
Applicant:
Facebook Technologies, Llc, Menlo Park, CA (US);
Inventors:
Christopher Percival, Blarney, IE;
Yijing Fu, Redmond, WA (US);
Assignee:
Facebook Technologies, LLC, Menlo Park, CA (US);
Attorney:
Primary Examiner:
Int. Cl.
CPC ...
G02B 27/28 (2006.01); H01L 25/075 (2006.01); H01L 33/24 (2010.01); H01L 33/58 (2010.01); H01L 33/10 (2010.01);
U.S. Cl.
CPC ...
G02B 27/286 (2013.01); H01L 25/0753 (2013.01); H01L 33/10 (2013.01); H01L 33/24 (2013.01); H01L 33/58 (2013.01); H01L 2933/0058 (2013.01);
Abstract
A vortex polarizer converts light having azimuthal polarization emitted at a light emitting surface of a light emitting diode (LED) into a converted light having linear polarization. The vortex polarizer includes a distribution of fast axes that vary as a function of azimuth angle. Each fast axis rotates a portion of the light having the azimuthal polarization to a portion of the converted light having linear polarization. The vortex polarizer may include linear photoalignment polymer (LPP) aligned to define the distribution of fast axes.