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:
Jul. 13, 2021
Filed:
Dec. 06, 2019
Applicant:
Lumileds Llc, San Jose, CA (US);
Inventors:
Assignee:
Lumileds LLC, San Jose, CA (US);
Attorney:
Primary Examiner:
Int. Cl.
CPC ...
H01L 33/50 (2010.01); H01L 33/32 (2010.01); F21S 43/14 (2018.01); B60Q 1/50 (2006.01);
U.S. Cl.
CPC ...
H01L 33/504 (2013.01); B60Q 1/50 (2013.01); F21S 43/14 (2018.01); H01L 33/32 (2013.01);
Abstract
A light emitting device comprises an LED emitting ultraviolet or blue light and one or more phosphors excited by the ultraviolet or blue light and in response emitting longer wavelength light to provide a combined phosphor emission spectrum having an emission peak at wavelength λwith a full width at half maximum of FWHM. With λand FWHM expressed in nm, 525 nm≥λ≥0.039*FWHM+492.7 nm. The light emitting device may be used, for example, to signal the autonomous driving state of an automobile.