Discharge lamp having two-band phosphor

US7199513B2 · kind B2 · utility

Assignee

• Patent-Treuhand-Gesellschaft fur elektrische Gluhlampen mbH · DE

Inventors

• Gunter Huber · Schrobenhausen, DE
• Frank Jermann · Königsbrunn, DE
• Ulrich Müller · Neustadt, DE
• Martin Zachau · Geltendorf, DE

Key dates

• Filing date: Jun 2, 2004
• Grant date: Apr 3, 2007
• Expiry date: Dec 20, 2024

Classification

• Technology area (CPC C): Chemistry; Metallurgy
• CPC primary: C09K11/7774
• WIPO field: Basic materials chemistry
• WIPO sector: Chemistry

Abstract

A discharge lamp (1) having a discharge vessel (2) that surrounds a discharge medium that emits electromagnetic radiation in the VUV region during operation of the lamp, has on the inner side of the discharge vessel wall a yellow phosphor layer facing the discharge medium, and a blue phosphor layer lying therebelow. By contrast with a conventional three-band phosphor mixture, a higher luminous flux and a smaller color locus displacement are thereby achieved.