Patent · US Expired

White light emitting diode

US7968005B2 · kind B2 · utility

2Cited by

3References

10Claims

0Family size

Assignee

RHODIA CHIMIE · FR

Inventors

Claude Ceintrey · Paris, FR
Thierry Le-Mercier · Rosny-sous-Bois, FR
Etienne Wortham · Meaux, FR

Key dates

Filing date	Apr 6, 2005
Grant date	Jun 28, 2011
Priority date	—
Expiry date	Jan 27, 2026

Classification

Technology area (CPC Y)Emerging Cross-Sectional Technologies
CPC primaryY02B20/00
WIPO fieldBasic materials chemistry
WIPO sectorChemistry

Abstract

The inventive white-light emitting diode is characterized in that it comprises a source emitting radiation whose wavelength band ranges from 370 to 420 nm, a first blue and red-light emitting phosphor of formula Ba3(1-x)Eu3xMg1-yMnySi2O8 (1), wherein 0 < x 0,3 and 0 < y 0,3 and a second green-light emitting phosphor. In another embodiment, said diode comprises the same source and a single phosphor whose chemical composition is Ba3(1-x)Eu3xMg1-yMnySi2O8, wherein 0 < x 0,3 et 0 < y 0,3 and which is embodied in the form of a mixture of at least Ba2SiO4, Ba2MgSi2O7 and Ba3MgSi2O8 phases. The inventive diode can be used for a lighting device.

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