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:
Jul. 28, 2015
Filed:
Nov. 18, 2013
3m Innovative Properties Company, St. Paul, MN (US);
Michael F. Weber, Shoreview, MN (US);
Timothy J. Nevitt, Red Wing, MN (US);
John A. Wheatley, Lake Elmo, MN (US);
Rolf W. Biernath, Wyoming, MN (US);
David G. Freier, St. Paul, MN (US);
Gilles J. Benoit, Minneapolis, MN (US);
Charles D. Hoyle, Stillwater, MN (US);
Andrew J. Ouderkirk, St. Paul, MN (US);
Zhaohui Yang, North Oaks, MN (US);
3M INNOVATIVE PROPERTIES COMPANY, St. Paul, MN (US);
Abstract
A recycling cavity such as used in a backlight or similar extended area source includes a front and back reflector, the front reflector being partially transmissive to provide an output illumination area. The recycling cavity also includes a component that provides the cavity with a balance of specular and diffuse characteristics so as to balance cavity efficiency and brightness uniformity over the output area. The component can be characterized by a transport ratio of greater than 15% for a 15 degree incidence angle, and less than 95% for a 45 degree incidence angle.