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:
Dec. 29, 2020
Filed:
Jan. 23, 2019
Applicant:
Lg Display Co., Ltd., Seoul, KR;
Inventor:
EunJung Park, Gyeonggi-do, KR;
Assignee:
LG Display Co., Ltd., Seoul, KR;
Attorney:
Primary Examiner:
Int. Cl.
CPC ...
H01L 51/50 (2006.01); H01L 51/52 (2006.01); H01L 27/32 (2006.01); F21S 43/14 (2018.01); F21S 45/10 (2018.01); F21S 41/155 (2018.01); F21S 43/145 (2018.01);
U.S. Cl.
CPC ...
H01L 51/5004 (2013.01); F21S 41/155 (2018.01); F21S 43/145 (2018.01); F21S 45/10 (2018.01); H01L 27/3209 (2013.01); H01L 51/5072 (2013.01); H01L 51/5092 (2013.01); H01L 51/5206 (2013.01); H01L 51/5221 (2013.01); H01L 51/5278 (2013.01); H01L 51/5068 (2013.01); H01L 2251/301 (2013.01); H01L 2251/552 (2013.01); H01L 2251/556 (2013.01);
Abstract
The organic light emitting display device includes a first layer on a first electrode, a second layer on the first layer, a second electrode on the second layer, and an N-type charge generation layer between the first layer and the second layer, wherein the first layer includes a first emission layer and a first electron transport layer, and the second layer includes a second emission layer and a second electron transport layer, and a low unoccupied molecular orbitals (LUMO) level of the first electron transport layer is higher than a LUMO level of a host included in the N-type charge generation layer.