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:
Nov. 27, 2018
Filed:
Aug. 21, 2013
3m Innovative Properties Company, St. Paul, MN (US);
David Scott Thompson, West Lakeland, MN (US);
Shawn C. Dodds, Saint Paul, MN (US);
Mikhail L. Pekurovsky, Bloomington, MN (US);
Kevin R. Schaffer, Woodbury, MN (US);
Matthew S. Stay, Minneapolis, MN (US);
Steven D. Solomonson, Shoreview, MN (US);
John A. Wheatley, Lake Elmo, MN (US);
Zhaohui Yang, North Oaks, MN (US);
Joseph W. Woody, V, Saint Paul, MN (US);
3M Innovative Properties Company, St. Paul, MN (US);
Abstract
Variable index light extraction layers that contain a first region with a first material and a second region including a second material are described, where the first region has a lower effective index of refraction than the second region. Optical films and stacks may use the variable index light extraction layers in front lit or back lit display devices and luminaires.