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. 10, 2008
Filed:
Dec. 30, 2004
Applicant:
Leland R. Whitney, St. Paul, MN (US);
Inventor:
Leland R. Whitney, St. Paul, MN (US);
Assignee:
3M Innovative Properties Company, Saint Paul, MN (US);
Attorney:
Primary Examiner:
Int. Cl.
CPC ...
F21V 5/00 (2006.01);
U.S. Cl.
CPC ...
Abstract
A brightness enhancement article for use in an optical system is disclosed. The brightness enhancement article has a structured surface including light directing protrusions. The light directing protrusions include a peak and a base, the peak having a rounded contour defined by a first pair of prism facets and the base defined by a second pair of prism facets. The first pair of prism facets has a first included angle and the second pair of prism facets has a second included angle, such that the first included angle is different than the second included angle.