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. 30, 2016
Filed:
Dec. 14, 2007
Ban P. Loh, Durham, NC (US);
Chenhua You, Cary, NC (US);
Bernd Keller, Santa Barbara, CA (US);
Nathaniel O. Cannon, Morrisville, NC (US);
Mitch Jackson, Raleigh, NC (US);
Ernest W. Combs, Raleigh, NC (US);
Ban P. Loh, Durham, NC (US);
Chenhua You, Cary, NC (US);
Bernd Keller, Santa Barbara, CA (US);
Nathaniel O. Cannon, Morrisville, NC (US);
Mitch Jackson, Raleigh, NC (US);
Ernest W. Combs, Raleigh, NC (US);
CREE, INC., Goleta, CA (US);
Abstract
A packaged LED device having a textured encapsulant that is conformal with a mount surface on which at least one LED chip is disposed. The textured encapsulant, which can be textured using an additive or subtractive process, is applied to the LED either prior to or during packaging. The encapsulant includes at least one textured surface from which light is emitted. The textured surface helps to reduce total internal reflection within the encapsulant, improving the extraction efficiency and the color temperature uniformity of the output profile. Several chips can be mounted beneath a single textured encapsulant. A mold having irregular surfaces can be used to form multiple encapsulants over many LEDs simultaneously.