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:
Feb. 21, 2023
Filed:
Jul. 22, 2019
Lg Display Co., Ltd., Seoul, KR;
Lg Chem, Ltd., Seoul, KR;
Tae-Ryang Hong, Paju-si, KR;
Hyong-Jong Choi, Paju-si, KR;
Jun-Yun Kim, Paju-si, KR;
Wan-Pyo Hong, Daejeon, KR;
Jin-Joo Kim, Daejeon, KR;
Hong-Sik Yoon, Seoul, KR;
LG DISPLAY CO., LTD., Seoul, KR;
LG CHEM, LTD., Seoul, KR;
Abstract
Disclosed is an organic light emitting diode (OLED) includes a first emitting material layer, which includes a first compound and a second compound, and a second emitting material layer, which includes a third compound and a fourth compound, wherein a HOMO energy level of the first compound is higher than a HOMO energy level of the second compound and a HOMO energy level of the third compound is lower than a HOMO energy level of the fourth compound, and an organic light emitting device having the OLED. The OLED and the organic light emitting device disclosed have enhanced luminous efficiency, color purity and luminous life span as well as low driving voltage by applying the emitting material layer.