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:
Apr. 01, 2025
Filed:
May. 17, 2024
Lumileds Llc, San Jose, CA (US);
Debapriya Pal, Amsterdam, NL;
Albert Femius Koenderink, Amsterdam, NL;
Antonio Lopez-Julia, Aachen, DE;
Mohamed S. Abdelkhalik, Eindhoven, NL;
Jaime Gomez Rivas, Eindhoven, NL;
Aleksandr Vaskin, Eindhoven, NL;
Lumileds LLC, San Jose, CA (US);
Abstract
A light-emitting device includes: a semiconductor diode structure, a reflector, a wavelength-converting layer, and an intermediate spacer between the diode structure and the wavelength-converting layer. The diode structure emits diode output light at a vacuum wavelength λto propagate within the diode structure. The reflector is on the back diode structure and internally reflects diode internally incident output light. The wavelength-converting layer is positioned with its back surface facing and spaced-apart from a front surface of the diode structure, and absorbs diode output light at λand emits down-converted light at a vacuum wavelength λ>λ, which exits the wavelength-converting layer through its front surface. The intermediate spacer includes one or more transparent dielectric layers and has an effective refractive index less than that of the wavelength-converting layer, so that the wavelength-converting layer acts as an optical waveguide supporting one or more laterally propagating optical modes at λand λ.