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:
Aug. 05, 2014
Filed:
Apr. 01, 2009
David J. Lundin, Woodbury, MN (US);
David G. Freier, St. Paul, MN (US);
Kenneth A. Epstein, St. Paul, MN (US);
Scott D. Gullicks, Woodbury, MN (US);
David J. Lundin, Woodbury, MN (US);
David G. Freier, St. Paul, MN (US);
Kenneth A. Epstein, St. Paul, MN (US);
Scott D. Gullicks, Woodbury, MN (US);
3M Innovative Properties Company, St. Paul, MN (US);
Abstract
A lighting system has one or more light guides capable of guiding light, each comprising a core and two optically smooth faces. A cavity adjacent to two of the optically smooth faces has an opening and a reflective-transmissive surface opposite the opening. A cover having a light source is proximate to and occludes the opening. A major portion of any light emitted from the light source is reflected by the reflective-transmissive surface of the cavity and is injected into the light guides, and a minor portion of any light emitted by the light source is transmitted through the reflective-transmissive surfaces of the cavity and emitted from the lighting system. A light injection coupler is also disclosed that has an optically transmissive housing and suitable for use to couple ends of at least one light guide thereby making a lighting system.