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:
Jul. 28, 2026
Filed:
Aug. 04, 2021
Samsung Display Co., Ltd., Yongin-si, KR;
Namsu Kang, Yongin-si, KR;
Dongkyu Lee, Yongin-si, KR;
Minkyung Kim, Yongin-si, KR;
Minho Park, Yongin-si, KR;
Huiju Park, Yongin-si, KR;
Jongwon Lee, Yongin-si, KR;
Hyunshik Lee, Yongin-si, KR;
Samsung Display Co., Ltd., Yongin-si, KR;
Abstract
A light-emitting device includes a first electrode, a second electrode, m emitting units, and m−1 charge generation layers. The m emitting units each include a hole transport region, an emission layer, and an electron transport region. At least one emission layer of the m emitting units includes a first emission layer and a second emission layer, and at least one hole transport region adjacent to a p-type charge generation layer includes a multi-layered hole transport layer consisting of a first non-doped layer, a doped layer, and a second non-doped layer. The first non-doped layer and the second non-doped layer each independently consist of a hole transport material, the doped layer includes a hole transport material and a p-dopant, and the hole transport region adjacent to the first electrode does not include the multi-layered hole transport layer. An electronic apparatus including the light-emitting device is also provided.