Patent · US Expired

Led-based illumination unit

US7183706B2 · kind B2 · utility

4Cited by

6References

8Claims

0Family size

Assignees

Patent-Treuhand-Gesellschaft fur elektrische Gluhlampen mbH · DE
OSRAM Opto Semiconductors GmbH · DE

Inventors

Andries Ellens · Munich, DE
Frank Jermann · Königsbrunn, DE
Michael Ostertag · Munich, DE

Key dates

Filing date	Dec 29, 2005
Grant date	Feb 27, 2007
Priority date	—
Expiry date	Dec 29, 2025

Classification

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

Abstract

The inventive white-light emitting luminescent conversion LED uses a chlorosilicate luminous substance which is doped with europium in addition to containing Ca and Mg and a garnet rare-earth substance, especially Y and/or Tb. This results in high quality color reproduction and highly constant lighting properties at various temperatures.

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