Patent · US Active

White emitting light source and luminescent material with improved colour stability

US8465166B2 · kind B2 · utility

3Cited by

3References

20Claims

0Family size

Assignee

Konklijke Philips Electronics N.V. · NL

Inventors

Joerg Meyer · Wagenfeld, DE
Hans-Helmut Bechtel · Roetgen, DE
Walter Mayr · Alsdorf, DE
Peter Josef Schmidt · Aachen, DE
Baby-Seriyati Schreinemacher · Eynatten, BE
Detlef Uwe Wiechert · Alsdorf, DE

Key dates

Filing date	Apr 15, 2008
Grant date	Jun 18, 2013
Priority date	—
Expiry date	Jul 27, 2030

Classification

Technology area (CPC H)Electricity
CPC primaryH01L2924/0002
WIPO fieldMaterials, metallurgy
WIPO sectorChemistry

Abstract

The invention relates to a white emitting light source with an improved luminescent material of the formula (AEN2/3)*b (MN)*c (SiN4/3)*d1 CeO3/2*d2 EuO*x SiO2*y AlO3/2 wherein AE is an alkaline earth metal chosen of the group of Ca, Mg, Sr and Ba or mixtures thereof and M is a trivalent element chosen of the group of Al, B, Ga, Sc with d1>10*d2. In combination with a UV to blue light generating device this material leads to an improved light quality and stability, especially an improved temperature stability for a wide range of applications.

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