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:
Dec. 03, 2019
Filed:
Nov. 02, 2015
The Regents of the University of California, Oakland, CA (US);
Michael Cantore, Goleta, CA (US);
Shuji Nakamura, Santa Barbara, CA (US);
Steven P. DenBaars, Goleta, CA (US);
THE REGENTS OF THE UNIVERSITY OF CALIFORNIA, Oakland, CA (US);
Abstract
A white light emitting device includes an edge-emitting laser diode, such as a III-nitride laser diode, emitting light in a first wavelength range that is converted to light at a longer wavelength by a single crystal, ceramic or polycrystalline phosphor, such as a Ce:YAG single crystal phosphor, wherein the phosphor absorbs only some of the light emitted from the laser diode, such that a combination of remaining light emitted from the laser diode with the light at the longer wavelength emitted from the phosphor results in emission of high-intensity white light from the device. Reflectors on either side of the edge-emitting III-nitride laser diode reflect the light from both ends of the edge-emitting laser diode towards the phosphor. One or more sides of the phosphor may roughened, or a scattering layer may be added, to promote uniform color mixing of the emissions.