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. 25, 2014
Filed:
Mar. 08, 2012
James Ibbetson, Santa Barbara, CA (US);
Ting LI, Pleasanton, CA (US);
Bernd Keller, Santa Barbara, CA (US);
James Ibbetson, Santa Barbara, CA (US);
Ting Li, Pleasanton, CA (US);
Bernd Keller, Santa Barbara, CA (US);
Cree, Inc., Durham, NC (US);
Abstract
A high efficiency light emitting diode with a composite high reflectivity layer integral to said LED or package to improve emission efficiency. One embodiment of a light emitting diode (LED) chip comprises a LED and a composite high reflectivity layer integral to the LED to reflect light emitted from the active region. One embodiment of a LED package comprises a LED mounted on a substrate with an encapsulant over said LED and a composite high reflectivity layer arranged to reflect emitted light. The composite layer comprises a plurality of layers such that at least one of said plurality of layers has an index of refraction lower than the encapsulant and a reflective layer on a side of said plurality of layers opposite the LED. In some embodiments, conductive vias are included through the composite layer to allow an electrical signal to pass through the layer to the LED.