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:
Jun. 25, 2013
Filed:
May. 19, 2008
Michael F. Weber, Shoreview, MN (US);
Timothy J. Hebrink, Scandia, MN (US);
Timothy J. Nevitt, Red Wing, MN (US);
John A. Wheatley, Lake Elmo, MN (US);
Craig R. Schardt, Woodbury, MN (US);
Rolf W. Biernath, Wyoming, MN (US);
William J. Bryan, Mahtomedi, MN (US);
Andrew J. Ouderkirk, Singapore, SG;
David G. Freier, St. Paul, MN (US);
Myron K. Jordan, Eagan, MN (US);
Kristopher J. Derks, Woodbury, MN (US);
Zhaohui Yang, North Oaks, MN (US);
Edward J. Kivel, Stillwater, MN (US);
Michael F. Weber, Shoreview, MN (US);
Timothy J. Hebrink, Scandia, MN (US);
Timothy J. Nevitt, Red Wing, MN (US);
John A. Wheatley, Lake Elmo, MN (US);
Craig R. Schardt, Woodbury, MN (US);
Rolf W. Biernath, Wyoming, MN (US);
William J. Bryan, Mahtomedi, MN (US);
Andrew J. Ouderkirk, Singapore, SG;
David G. Freier, St. Paul, MN (US);
Myron K. Jordan, Eagan, MN (US);
Kristopher J. Derks, Woodbury, MN (US);
Zhaohui Yang, North Oaks, MN (US);
Edward J. Kivel, Stillwater, MN (US);
3M Innovative Properties Company, St. Paul, MN (US);
Abstract
A backlight that includes a front reflector and a back reflector that form a hollow light recycling cavity including an output surface is disclosed. The backlight further includes one or more light sources disposed to emit light into the light recycling cavity. The front reflector includes an on-axis average reflectivity of at least 90% for visible light polarized in a first plane, and an on-axis average reflectivity of at least 25% but less than 90% for visible light polarized in a second plane perpendicular to the first plane.