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:
May. 22, 2018
Filed:
Aug. 24, 2015
Lg Display Co., Ltd., Seoul, KR;
SungHoon Joo, Gyeonggi-do, KR;
Jeongdae Seo, Incheon, KR;
Hyoseok Kim, Daejeon, KR;
Hyeseung Kang, Seoul, KR;
Seonkeun Yoo, Gyeonggi-do, KR;
Min Yun, Gyeonggi-do, KR;
LG Display Co., Ltd., Seoul, KR;
Abstract
An organic light emitting display device is disclosed. The organic light emitting display device comprises at least two light emitting parts between an anode and a cathode, each of the light emitting parts having a light emitting layer and an electron transport layer, charge generation layers between the at least two light emitting parts, wherein at least one among the electron transport layers in the at least two light emitting parts includes a pyrimidine derivative at both sides of the core so as to reduce a driving voltage and increase an efficiency of the organic light emitting display device.