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:
Jul. 02, 2013
Filed:
Jun. 01, 2012
Chang-yen Wu, Hsinchu, TW;
Ting-yi Cho, Hsinchu, TW;
Meng-ting Lee, Hsinchu, TW;
Meng-huan Ho, Hsinchu, TW;
Po-hsuan Chiang, Hsinchu, TW;
Chieh-wei Chen, Hsinchu, TW;
Chang-Yen Wu, Hsinchu, TW;
Ting-Yi Cho, Hsinchu, TW;
Meng-Ting Lee, Hsinchu, TW;
Meng-Huan Ho, Hsinchu, TW;
Po-Hsuan Chiang, Hsinchu, TW;
Chieh-Wei Chen, Hsinchu, TW;
Au Optronics Corporation, Hsinchu, TW;
Abstract
In one aspect of the invention, an organic light emitting diode device has a substrate, a cathode formed on the substrate, an anode spaced-apart from the cathode, a plurality of electroluminescent units stacked between the cathode and the anode, and a plurality of charge generation layers, each of which is formed between two adjacent electroluminescent units. Each electroluminescent unit has an electron-transport layer, an emission layer formed on the electron-transport layer, and a hole-transport layer formed on the emission layer. The electron-transport layer of the first electroluminescent unit is formed on the cathode, defining a first energy barrier, and the anode is formed on the hole-transport layer of the last electroluminescent unit, defining a second energy barrier. The first energy barrier is higher than the second energy barrier. The first electroluminescent unit has a lifetime longer than that of each of the rest electroluminescent units.