Electroluminescent device with improved light output

US7495386B2 · kind B2 · utility

Assignee

• KONINKLIJKE PHILIPS ELECTRONICS NV · NL

Inventors

• Hans-Helmut Bechtel · Roetgen, DE
• Wolfgang Busselt · Roetgen, DE
• Joachim Opitz · Aachen, DE
• Markus Klein · Glückstadt, DE
• Dietrich Bertram · Aachen, DE
• Harald Gläser · Aachen, DE

Key dates

• Filing date: Aug 15, 2007
• Grant date: Feb 24, 2009
• Expiry date: Aug 15, 2027

Classification

• Technology area (CPC Y): Emerging Cross-Sectional Technologies
• CPC primary: Y10S428/917

Abstract

An electroluminescent device includes a substrate and a laminated body composed of a first electrode, an electroluminescent layer and a second electrode. The light output out of the electroluminescent device is increased by arranging a colloidal layer between the substrate and the laminated body. By using pigments in the colloidal layer, the emission color of the electroluminescent device can be changed and the daylight contrast improved.