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. 21, 2017
Filed:
Oct. 09, 2007
Andrew J. Ouderkirk, Woodbury, MN (US);
Catherine A. Leatherdale, St. Paul, MN (US);
Arlie R. Conner, Portland, OR (US);
Andrew J. Ouderkirk, Woodbury, MN (US);
Catherine A. Leatherdale, St. Paul, MN (US);
Arlie R. Conner, Portland, OR (US);
3M Innovative Properties Company, St. Paul, MN (US);
Abstract
Light sources are disclosed utilizing LED dies that have a light emitting surface. A patterned low refractive index layer that can support total internal reflection within the LED die is provided in optical contact with a first portion of the emitting surface. In optical contact with a second portion of the emitting surface is an input surface of an optical element. The refractive index of the low index layer is below both that of the optical element and the LED die. The optical element can have a variety of shapes and sizes.