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:
Mar. 05, 2019
Filed:
Jun. 26, 2014
Applicant:
3m Innovative Properties Company, St. Paul, MN (US);
Inventors:
Tilo Remhof, Hilden, DE;
Nicholas T. Gabriel, Woodbury, MN (US);
Andrew J. Ouderkirk, St. Paul, MN (US);
Assignee:
3M Innovative Properties Company, St.Paul, MN (US);
Attorney:
Primary Examiner:
Assistant Examiner:
Int. Cl.
CPC ...
F21V 8/00 (2006.01);
U.S. Cl.
CPC ...
G02B 6/0048 (2013.01); G02B 6/0018 (2013.01); G02B 6/0028 (2013.01); G02B 6/0078 (2013.01);
Abstract
The present disclosure describes a flat lightguide configured to be illuminated by one or more small light sources, such as light emitting diode (LED) light sources. The one or more small light sources inject light into an end of a stepped lightguide that includes light redirecting elements capable of changing the direction of the light to exit perpendicular to the stepped lightguide and enter an edge of a planar lightguide.