Patent · US Expired

Light source using a yellow-to-red-emitting phosphor

US6649946B2 · kind B2 · utility

94Cited by

3References

10Claims

0Family size

Assignee

OSRAM Opto Semiconductors GmbH · DE

Inventors

Georg Bogner · Lappersdorf, DE
Ir G. Botty · Venlo, NL
Bert Braune · Völklingen, DE
Hubertus T. Hintzen · Eindhoven, NL
Jost W. H. van Krevel · Eindhoven, NL
Guenter Waitl · Regensburg, DE

Key dates

Filing date	Jan 22, 2002
Grant date	Nov 18, 2003
Priority date	—
Expiry date	Mar 26, 2022

Classification

Technology area (CPC C)Chemistry; Metallurgy
CPC primaryC09K11/77347
WIPO fieldBasic materials chemistry
WIPO sectorChemistry

Abstract

A light source uses a yellow to red emitting phosphor with a host lattice of the nitridosilicate type MxSiyNz:Eu, wherein M is at least one of an alkaline earth metal chosen from the group Ca, Sr, Ba and wherein z=2/3x+4/3y.

Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.