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:
Oct. 20, 2015
Filed:
Aug. 01, 2011
Bryan V. Hunt, Nowthen, MN (US);
Robert M. Emmons, Saint Paul, MN (US);
Corey D. Balts, Eau Claire, WI (US);
Bryan V. Hunt, Nowthen, MN (US);
Robert M. Emmons, Saint Paul, MN (US);
Corey D. Balts, Eau Claire, WI (US);
3M INNOVATIVE PROPERTIES COMPANY, St. Paul, MN (US);
Abstract
Light directing film () is disclosed. The light directing film includes a structured major surface () that includes a plurality of microstructures () extending along a first direction () and a plurality of elevated portions () disposed on the plurality of microstructures. The number density of the elevated portions across the light directing film is D. Each elevated portion includes a leading edge () and a trailing edge () along the first direction. The light directing film can be divided into a plurality of same size and shape grid cells that form a continuous two-dimensional grid. The area of each grid cell is approximately 1/D. Each of at least 70% of the grid cells includes a single leading edge () of an elevated portion ().