Led-based white-emitting illumination unit

US6504179B1 · kind B1 · utility

Assignees

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

Inventors

• Andries Ellens · Munich, DE
• Frank Jermann · Königsbrunn, DE
• Franz Kummer · Munich, DE
• Michael Ostertag · Munich, DE
• Franz Zwaschka · Ismaning, DE

Key dates

• Filing date: Jan 17, 2002
• Grant date: Jan 7, 2003
• Expiry date: Jan 17, 2022

Classification

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

Abstract

A white-emitting luminescence conversion LED uses a chlorosilicate phosphor which, in addition to Ca and Mg, contains a europium doping, and also a garnet phosphor of the rare earths, in particular Y and/or Tb. In this way, it is possible to achieve a high color rendering and a high constancy of the lighting properties under differing temperature conditions.