The patent badge is an abbreviated version of the USPTO patent document. The patent badge does contain a link to the full patent document.
The patent badge is an abbreviated version of the USPTO patent document. The patent badge covers the following: Patent number, Date patent was issued, Date patent was filed, Title of the patent, Applicant, Inventor, Assignee, Attorney firm, Primary examiner, Assistant examiner, CPCs, and Abstract. The patent badge does contain a link to the full patent document (in Adobe Acrobat format, aka pdf). To download or print any patent click here.
Patent No.:
Date of Patent:
Mar. 29, 2005
Filed:
Jul. 02, 2002
Hans-helmut Bechtel, Roetgen, DE;
Markus Heinrich Klein, Aachen, DE;
Joachim Opitz, Aachen, DE;
Henricus Franciscus Johannus Jacobus Van Tongeren, Eindhoven, DE;
Hans-Helmut Bechtel, Roetgen, DE;
Markus Heinrich Klein, Aachen, DE;
Joachim Opitz, Aachen, DE;
Henricus Franciscus Johannus Jacobus Van Tongeren, Eindhoven, DE;
Koninklijke Philips Electronics N.V., Eindhoven, NL;
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 λ, and to transmit electromagnetic radiation whose wavelength is above a cut-off wavelength λ, has an improved contrast under bright ambient light conditions.