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. 18, 2014
Filed:
Apr. 14, 2010
William D. Coggio, Hudson, WI (US);
John A. Wheatley, Lake Elmo, MN (US);
Tao Liu, Woodbury, MN (US);
Brian W. Ostlie, Hudson, WI (US);
Encai Hao, Woodbury, MN (US);
William Blake Kolb, West Lakeland, MN (US);
Qingbing Wang, Woodbury, MN (US);
Michael Benton Free, St. Paul, MN (US);
Michael L. Steiner, New Richmond, WI (US);
Scott M. Tapio, Falcon Heights, MN (US);
William D. Coggio, Hudson, WI (US);
John A. Wheatley, Lake Elmo, MN (US);
Tao Liu, Woodbury, MN (US);
Brian W. Ostlie, Hudson, WI (US);
Encai Hao, Woodbury, MN (US);
William Blake Kolb, West Lakeland, MN (US);
Qingbing Wang, Woodbury, MN (US);
Michael Benton Free, St. Paul, MN (US);
Michael L. Steiner, New Richmond, WI (US);
Scott M. Tapio, Falcon Heights, MN (US);
3M Innovative Properties Company, St. Paul, MN (US);
Abstract
Lightguide is disclosed. The lightguide includes a light guiding layer for propagating light by total internal reflection, and an optical film that is disposed on the light guiding layer. The optical film includes a plurality of voids, an optical haze that is not less than about 30%, and a porosity that is not less than about 20%. Substantial portions of each two neighboring major surfaces in the lightguide are in physical contact with each other.