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:
Jun. 30, 2015
Filed:
Apr. 13, 2005
Yeh-jiun Tung, Princeton, NJ (US);
Michael S. Weaver, Princeton, NJ (US);
Michael Hack, Lambertville, NJ (US);
James Esler, Levittown, PA (US);
Yeh-Jiun Tung, Princeton, NJ (US);
Michael S. Weaver, Princeton, NJ (US);
Michael Hack, Lambertville, NJ (US);
James Esler, Levittown, PA (US);
Universal Display Corporation, Ewing, NJ (US);
Abstract
The present invention provides organic light emitting devices having a combined emission from at least two emissive materials, a fluorescent blue emissive material and a phosphorescent emissive material. The device may further comprise additional fluorescent or phosphorescent emissive materials. In preferred embodiments, the invention provides OLEDs having three different emissive materials—a red emissive material, a green emissive material and a blue emissive material. The invention provides a device architecture which is optimized for efficiency and lifetime by using a combination of fluorescent and phosphorescent emitters. Further, in preferred embodiments the device architecture provides a high color-stability of the light emission over a wide range of currents or luminances.