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:
Aug. 16, 2016
Filed:
Oct. 25, 2012
Applicant:
3m Innovative Properties Company, St. Paul, MN (US);
Inventors:
Richard Y. Liu, Woodbury, MN (US);
Alan P. Miller, Blaine, MN (US);
Assignee:
3M INNOVATIVE PROPERTIES COMPANY, St. Paul, MN (US);
Attorney:
Primary Examiner:
Assistant Examiner:
Int. Cl.
CPC ...
G03B 21/00 (2006.01); G03B 21/604 (2014.01); G02B 27/26 (2006.01);
U.S. Cl.
CPC ...
G03B 21/604 (2013.01); G02B 27/26 (2013.01);
Abstract
Projection 3D systems and polarization preserving 3D screens are described that substantially increase polarization contrast ratio and viewing angle. The screen comprises a structured surface having a certain slope distribution, formed by a plurality of beadswith a layerdisposed thereon, which is coated by a reflective layer