Organic electroluminescent display device comprising an optical filter

US6873091B2 · kind B2 · utility

Assignee

• KONINKLIJKE PHILIPS ELECTRONICS NV · NL

Inventors

• Hans-Helmut Bechtel · Roetgen, DE
• Markus Klein · Glückstadt, DE
• Joachim Opitz · Aachen, DE
• Henricus Franciscus Johannus Jacobus Van Tongeren · Eindhoven, NL

Key dates

• Filing date: Jul 2, 2002
• Grant date: Mar 29, 2005
• Expiry date: Apr 4, 2023

Classification

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

Abstract

An organic electroluminescent display device comprising a front electrode member, a counterelectrode member, an organic electroluminescent member arranged between the front electrode member and the counterelectrode member, and an optical filter member with a cut-off filter to absorb electromagnetic radiation whose wavelength is below a cut-off wavelength λk, and to transmit electromagnetic radiation whose wavelength is above a cut-off wavelength λk, has an improved contrast under bright ambient light conditions.