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. 24, 2014
Filed:
Jun. 01, 2009
David J. W. Aastuen, Shoreview, MN (US);
Kenneth A. Epstein, St. Paul, MN (US);
Byung-soo Ko, Kyeonggi-do, KR;
John A. Wheatley, Lake Elmo, MN (US);
David J. W. Aastuen, Shoreview, MN (US);
Kenneth A. Epstein, St. Paul, MN (US);
Byung-Soo Ko, Kyeonggi-do, KR;
John A. Wheatley, Lake Elmo, MN (US);
3M Innovative Properties Company, St. Paul, MN (US);
Abstract
In one embodiment, the invention provides backlight comprising a front reflector () and a back reflector () disposed to form a hollow light cavity () with a first light source () proximate one end of the front reflector () and having a tilt angle () of from 5° to 90°, and a first asymmetric light collimator () extending between at least the first light source () and the back reflector () for directing light from the first light source () into the hollow light cavity ().