Light emitting device with an improved CaAlSiN light converting material

US8159126B2 · kind B2 · utility

Assignee

• KONINKLIJKE PHILIPS ELECTRONICS NV · NL

Inventors

• Peter Josef Schmidt · Aachen, DE
• Joerg Meyer · Wagenfeld, DE
• Walter Mayr · Alsdorf, DE
• Wolfgang Busselt · Roetgen, DE
• Hans-Helmut Bechtel · Roetgen, DE

Key dates

• Filing date: Oct 26, 2006
• Grant date: Apr 17, 2012
• Expiry date: Apr 6, 2029

Classification

• Technology area (CPC H): Electricity
• CPC primary: H10H20/8512
• WIPO field: Materials, metallurgy
• WIPO sector: Chemistry

Abstract

A light emitting device with a light source to emit primary light and a light conversion layer to convert at least a part of the primary light into secondary light includes a CaAlSiN light converting material with a transmissivity of ≧10% to ≦80% for a light in the wavelength range from ≧580 to ≦1000 nm.