US Patent No. 10,023,796

ILLUMINATION SYSTEM COMPRISING COMPOSITE MONOLITHIC CERAMIC LUMINESCENCE CONVERTER


Patent No. 10,023,796
Issue Date July 17, 2018
Title Illumination System Comprising Composite Monolithic Ceramic Luminescence Converter
Inventorship Peter J. Schmidt, Aachen (DE)
Lucas Johannes Anna Maria Beckers, Veldhoven (NL)
Joerg Meyer, Aachen (DE)
Baby-Seriyati Schreinemacher, Eynatten (BE)
Herbert Schreinemacher, Baesweiler (DE)
Assignee Lumileds LLC, San Jose, CA (US)

Claim of US Patent No. 10,023,796

1. An illumination system comprising a radiation source and a monolithic ceramic luminescence converter comprising a composite material comprising at least one luminescent compound comprising at least one activator in a host lattice and at least one non-luminescent compound, wherein the luminescent compound and the non-luminescent compound each comprise silicon and nitrogen and wherein the host lattice and the non-luminescent compound are different materials, wherein the luminescent compound is an amber or red-emitting europium(II)-doped alkaline earth oxonitridoaluminosilicate compound of general formula Ba2?x?zMXSi5?yAlyN8?yOy: Euz, wherein M=Sr, Ca; 0?x?2, 0?y?4, 0.0005?z?0.06 and the non-luminescent compound is an alkaline earth oxonitridoaluminosilicate compound of general formula Ba1?xMXSi7?yAlyN10?yOy, wherein M=Sr, Ca, Eu; 0?x?1 and 0?y?3.