Patent · US Active

Lighting device with light source and wavelength converting element

US9175214B2 · kind B2 · utility

4Cited by

0References

13Claims

0Family size

Assignee

KONINIKLIJKE PHILIPS N.V. · NL

Inventors

Joerg Meyer · Wagenfeld, DE
Volker Weiler · Aachen, DE
Peter Josef Schmidt · Aachen, DE

Key dates

Filing date	Dec 17, 2010
Grant date	Nov 3, 2015
Priority date	—
Expiry date	Dec 17, 2031

Classification

Technology area (CPC H)Electricity
CPC primaryH10H20/8512
WIPO fieldBasic materials chemistry
WIPO sectorChemistry

Abstract

The invention relates to a lighting (1) device comprising a light source (2) and a wavelength converting element (7), which comprises a phosphor compounded with a polymer. The phosphor contains a metal-ion activator which is excitable via a partially forbidden electronic transition. The phosphor and the polymer being chosen such that the difference in their refractive index is smaller than 0.1. Due to this choice, scattering in the wavelength converting element (7) remains at minimum. Interesting wavelength converting elements (7) are obtained when using phosphors comprising specific Mn(IV)-activated fluoride compounds and specific fluorine-containing polymers.

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