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. 01, 2005
Filed:
Apr. 17, 2003
Chien-hong Cheng, Hsinchu, TW;
Huai-ting Shih, Hsinchu, TW;
Kuo-chen Wu, Hsinchu, TW;
National Tsing Hua University, Hsinchu, TW;
Abstract
A blue organic light emitting diode (LED) comprises a cathode formed on a substrate, a light emitting layer formed on said cathode, and an anode formed on said light emitting layer, which is characterized in that said light emitting layer comprises a compound of the following formulas I or II: wherein Arand Arindependently are substituted or unsubstituted isochrysenylAr—Ar  IAr—Ar—Ar  II(triphenylenyl), anthracenyl, naphthalyl, biphenyl, pyrenyl, or phenanthrenyl; Aris substituted or unsubstituted phenylene, biphenylene, naphthylene, anthracenylene, or fluorenylene.