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. 01, 2016
Filed:
Feb. 16, 2011
Tao Tong, Oxnard, CA (US);
Ronan Letoquin, Fremont, CA (US);
Bernd Keller, Santa Barbara, CA (US);
James Ibbetson, Santa Barbara, CA (US);
Gerald Negley, Durham, NC (US);
Tao Tong, Oxnard, CA (US);
Ronan LeToquin, Fremont, CA (US);
Bernd Keller, Santa Barbara, CA (US);
James Ibbetson, Santa Barbara, CA (US);
Gerald Negley, Durham, NC (US);
CREE, INC., Durham, NC (US);
Abstract
LED packages, and LED lamps and bulbs, are disclosed that are arranged to minimize the CRI and efficiency losses resulting from the overlap of conversion material emission and excitation spectrum. In different devices having conversion materials with this overlap, the present invention arranges the conversion materials to reduce the likelihood that re-emitted light from a first conversion materials will encounter the second conversion material to minimize the risk of re-absorption. In some embodiments this risk is minimized by different arrangements where there is separation between the two phosphors. In some embodiments this separation results less than 50% of re-emitted light from the one phosphor passing into the phosphor where it risks re-absorption.