Thermal light source having a high color rendering quality

US8410507B2 · kind B2 · utility

Assignee

• OSRAM Opto Semiconductors GmbH · DE

Inventors

• Peter Stauss · Regensburg, DE
• Reiner Windisch · Nittendorf, DE
• Frank Baumann · Regensburg, DE
• Matthias Peter · Orpund, CH

Key dates

• Filing date: Aug 11, 2009
• Grant date: Apr 2, 2013
• Expiry date: Aug 11, 2029

Classification

• Technology area (CPC H): Electricity
• CPC primary: H10H20/851
• WIPO field: Semiconductors
• WIPO sector: Electrical engineering

Abstract

A luminous means (1) including at least one optoelectronic semiconductor device (2) which emits electromagnetic radiation during operation at at least one first wavelength (L1) and at at least one second wavelength (L2), wherein the first wavelength (L1) and the second wavelength (L2) differ from one another and are below 500 nm, in particular between 200 nm and 500 nm. Furthermore, the luminous means (1) includes at least one conversion means (3) which converts the first wavelength (L1) at least partly into radiation having a different frequency. The radiation spectrum emitted by the luminous means (1) during operation is metameric with respect to a black body spectrum. Such a luminous means makes it possible to choose the first wavelength and the second wavelength in such a way that a high color rendering quality and a high efficiency of the luminous means can be realized simultaneously.