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. 13, 2013
Filed:
Mar. 09, 2010
Gerald H. Negley, Chapel Hill, NC (US);
Antony Paul Van DE Ven, Hong Kong, CN;
Bernd P. Keller, Santa Barbara, CA (US);
Ronan P. Letoquin, Ventura, CA (US);
Peter Scott Andrews, Durham, NC (US);
Gerald H. Negley, Chapel Hill, NC (US);
Antony Paul van de Ven, Hong Kong, CN;
Bernd P. Keller, Santa Barbara, CA (US);
Ronan P. LeToquin, Ventura, CA (US);
Peter Scott Andrews, Durham, NC (US);
Cree, Inc., Durham, NC (US);
Abstract
Solid state lighting devices include least one solid state emitter and multiple lumiphors, arranged to output aggregated emissions that include at least one short wavelength blue peak, at least one long wavelength blue (LWB) peak, at least one yellow and/or green peak, and at least one red and/or orange peak. Presence of long wavelength blue enhances color rendering. At least one solid state emitter may include a short wavelength blue LED, LWB LED, and/or UV LED. Multiple emitters may be provided. Resulting devices may provide CRI greater than 85, efficiency of greater than 50 lm/watt, and color stability in a range of Δu'v′≦0.008 over a temperature change of 75° C.