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:
Jul. 09, 2013
Filed:
Sep. 09, 2011
Gregory P. Frankiewicz, Mayfield Heights, OH (US);
Roger F. Buelow, Ii, Gate Mills, OH (US);
David Bina, Northfield Center, OH (US);
Jeremias A. Martins, Twinsburg, OH (US);
Chris Jenson, Twinsburg, OH (US);
Gregory P. Frankiewicz, Mayfield Heights, OH (US);
Roger F. Buelow, II, Gate Mills, OH (US);
David Bina, Northfield Center, OH (US);
Jeremias A. Martins, Twinsburg, OH (US);
Chris Jenson, Twinsburg, OH (US);
Energy Focus, Inc., Solon, OH (US);
Abstract
Elongated lighting system comprises an elongated light pipe having first and second ends, with light supplied to those ends by at least one light source, via first and second light couplers that condition light to increase reflections within the light pipe. Light-extraction structure on the light pipe extracts light from the side of the pipe. An indentation in the light pipe has a depth and has surfaces oriented with respect to the pipe so as (1) to redirect light from the first light source that reaches the indentation after passing once through a plane adjacent the indentation, back through the plane and towards the first end; and (2) to sufficiently increase the average angular distribution of light reflected from the indentation and passing back through the plane as would cause at least 50 percent more reflections of the foregoing light within the pipe in the absence of the light-extraction structure.