LED-based white-emitting illumination unit

US7002291B2 · kind B2 · utility

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 22, 2004
• Grant date: Feb 21, 2006
• Expiry date: Dec 22, 2024

Classification

• Technology area (CPC Y): Emerging Cross-Sectional Technologies
• CPC primary: Y02B20/00
• WIPO field: Basic materials chemistry
• WIPO sector: Chemistry

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 colour reproduction and highly constant lighting properties at various temperatures.