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:
Jan. 17, 2023
Filed:
Dec. 27, 2019
Lg Display Co., Ltd., Seoul, KR;
Soulbrain Co., Ltd., Seongnam-si, KR;
Hyong-Jong Choi, Paju-si, KR;
Tae-Ryang Hong, Paju-si, KR;
Jun-Yun Kim, Paju-si, KR;
Jin Hee Kim, Paju-si, KR;
Ah-Rang Lee, Paju-si, KR;
LG DISPLAY CO., LTD., Seoul, KR;
SOULBRAIN CO., LTD., Seongnam-si, KR;
Abstract
The present disclosure provides an organic light emitting diode comprising a first electrode; a second electrode facing the first electrode; and an emitting material layer. The emitting material layer includes a p-type host, a n-type host and a phosphorescent dopant and positioned between the first electrode and the second electrode, wherein a first energy level of a HOMO of the p-type host is equal to or lower than a second energy level of a HOMO of the n-type host, and a difference between an energy level of a singlet state of the n-type host and an energy level of a triplet state of the n-type host is greater than 0.3 eV and smaller than 0.5 eV.