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:
Oct. 27, 2015
Filed:
Nov. 20, 2012
Hyoung-kun Kim, Yongin, KR;
Sam-il Kho, Yongin, KR;
Mie-hwa Park, Yongin, KR;
Yoon-hyun Kwak, Yongin, KR;
Ja-hyun Im, Yongin, KR;
Chang-woong Chu, Yongin, KR;
Kwan-hee Lee, Yongin, KR;
Hyoung-Kun Kim, Yongin, KR;
Sam-Il Kho, Yongin, KR;
Mie-Hwa Park, Yongin, KR;
Yoon-Hyun Kwak, Yongin, KR;
Ja-Hyun Im, Yongin, KR;
Chang-Woong Chu, Yongin, KR;
Kwan-Hee Lee, Yongin, KR;
SAMSUNG DISPLAY CO., LTD., Yongin, Gyunggi-Do, KR;
Abstract
An organic light-emitting device includes an emission layer between first and second electrodes, a first hole transport layer that is between the emission layer and the first electrode and that includes a first hole transport compound and a first electron acceptor, a second hole transport layer that is between the emission layer and first hole transport layer and that includes a second hole transport compound, a third hole transport layer that is between the emission layer and the second hole transport layer and that includes a third hole transport compound and a second electron acceptor, a fourth hole transport layer that is between the emission layer and the third hole transport layer and that includes a fourth hole transport compound, a buffer layer between the emission layer and the fourth hole transport layer, and an electron transport layer that includes a pyrimidine-based compound.