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:
Sep. 01, 2020
Filed:
Nov. 29, 2016
3m Innovative Properties Company, St. Paul, MN (US);
Brett J. Sitter, Cottage Grove, MN (US);
Matthew M. Philippi, St. Paul, MN (US);
Mary M. Pichotta, Minneapolis, MN (US);
Chi Zhang, San Jose, CA (US);
Daniel W. Hennen, Cottage Grove, MN (US);
Gary T. Boyd, Woodbury, MN (US);
Michael E. Lauters, Hudson, WI (US);
3M Innovative Properties Company, St. Paul, MN (US);
Abstract
An optical stack including a periodically varying optical film layer and a grating assembly for reducing moiré is described. The grating assembly includes first and second layers where an interface between the first and second layers define a grating having a peak to valley height and an index contrast. The index contrast multiplied by the peak to valley height may be between 150 nm and 350 nm and the grating has a pitch in the range of 2 micrometers to 50 micrometers. Each of the first and second layers may be viscoelastic or elastomeric adhesive layers, crosslinked resin layers, or soluble resin layers.