Patent · US Active

LED based device with wide color gamut

US9564557B2 · kind B2 · utility

7Cited by

2References

15Claims

0Family size

Assignee

KONINIKLIJKE PHILIPS N.V. · NL

Inventors

Volker Weiler · Aachen, DE
Peter Josef Schmidt · Aachen, DE
Hans-Helmut Bechtel · Roetgen, DE

Key dates

Filing date	Oct 22, 2013
Grant date	Feb 7, 2017
Priority date	—
Expiry date	Dec 29, 2033

Classification

Technology area (CPC H)Electricity
CPC primaryH01L2924/0002
WIPO fieldBasic materials chemistry
WIPO sectorChemistry

Abstract

The invention provides a lighting unit comprising a source of blue light, a source of green light, a first source of red light comprising a first red luminescent material, configured to provide red light with a broad band spectral light distribution, and a second source of red light comprising a second red luminescent material, configured to provide red light with a spectral light distribution comprising one or more red emission lines. Especially, the first red luminescent material comprises (Mg,Ca,Sr)AlSiN3:Eu and/or (Ba,Sr,Ca)2Si5-xAlxOxN8-x:Eu, and the second red luminescent material comprises K2SiF6:Mn.

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