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:
Apr. 28, 2020
Filed:
Apr. 28, 2016
3m Innovative Properties Company, St. Paul, MN (US);
Tao Liu, Woodbury, MN (US);
Brent A. Hedding, Hudson, WI (US);
David C. Mercord, Prescott, WI (US);
Brian W. Ostlie, Hudson, WI (US);
3M INNOVATIVE PROPERTIES COMPANY, St. Paul, MN (US);
Abstract
Lightguides that include a plurality of discrete spaced apart light extracting structures are described. Each light extracting structure includes opposing inclined first and second sidewalls extending from a first side of the lightguide toward an optical axis of the light guide and meeting at an elongated peak extending along a first direction substantially perpendicular to the optical axis, and may include opposing first and second endwalls extending between the first and second sidewalls from the first side of the lightguide to the elongated peak to form a notch extending into a core of the lightguide. The first and second sidewalls are adapted to extract light propagating along the lightguide from an opposite second side of the lightguide by reflecting the propagating light toward the second side. The notch may have raised edges along at least a portion of a perimeter of the notch.