Electroluminescent device with improved light output

US7262551B2 · 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: Jun 18, 2003
• Grant date: Aug 28, 2007
• Expiry date: Nov 22, 2023

Classification

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

Abstract

The invention relates to an electroluminescent device comprising a substrate (1) and a laminated body composed of a first electrode (3), an electroluminescent layer (4) and a second electrode (5). The light output out of the electroluminescent device is increased by arranging a colloidal layer (2) between the substrate (1) and the laminated body. By using pigments in the colloidal layer (2), the emmission color of the electroluminescent device can be changed and the daylight contrast improved.