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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.:

US 11974449 B1

PDFFull Text
Date of Patent:
Apr. 30, 2024

Filed:

Jul. 13, 2021

Tandem organic light emitting element and display device including the same

Applicant:

Samsung Display Co., Ltd., Yongin-si, KR;

Inventors:

Seokjae Lee, Seongnam-si, KR;

Yunjae Kim, Suwon-si, KR;

Jungkyun Kim, Gunpo-si, KR;

Hyungu Kim, Yongin-si, KR;

Bohun Park, Cheonan-si, KR;

Jin Woo Park, Yongin-si, KR;

Jungjin Yang, Seoul, KR;

Bum Suk Lee, Hwaseong-si, KR;

Sunhye Lee, Hwaseong-si, KR;

Jaejin Lee, Hwaseong-si, KR;

Assignee:

SAMSUNG DISPLAY CO., LTD., Yongin-si, KR;

Attorney:

KILE PARK REED & HOUTTEMAN PLLC

Primary Examiner:

Daniel Whalen

Int. Cl.
CPC ...
H10K 50/19 (2023.01); H10K 50/13 (2023.01); H10K 50/15 (2023.01); H10K 50/16 (2023.01); H10K 50/17 (2023.01); H10K 50/805 (2023.01); H10K 102/00 (2023.01);
U.S. Cl.
CPC ...
H10K 50/805 (2023.02); H10K 50/131 (2023.02); H10K 50/15 (2023.02); H10K 50/16 (2023.02); H10K 50/171 (2023.02); H10K 50/19 (2023.02); H10K 2102/351 (2023.02);
Abstract

A light-emitting element may include a first electrode, a second electrode facing the first electrode, a first hole transport layer disposed above the first electrode, a first electron transport layer disposed between the first hole transport layer and the second electrode. A first light-emitting part and a second light-emitting part that emit different light may be disposed between the first hole transport layer and the first electron transport layer. The first light-emitting part may include a first blue emission layer, a second electron transport layer, a charge generation layer, and a second blue emission layer, and the first blue emission layer may be disposed above the first hole transport layer. At least one of the first electron transport layer and the second electron transport layer may be directly disposed above at least one of the first blue emission layer and the second blue emission layer.

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