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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 12356795 B1

PDFFull Text
Date of Patent:
Jul. 08, 2025

Filed:

Jul. 06, 2023

Light emitting diode and display device including the same

Applicant:

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

Inventors:

Bora Lee, Hwaseong-si, KR;

Hyomin Ko, Suwon-si, KR;

Illhun Cho, Seoul, KR;

Eunjae Jeong, Hwaseong-si, KR;

Minji Kim, Hwaseong-si, KR;

Sohee Jo, Cheonan-si, KR;

Dongjun Kim, Suwon-si, KR;

Hankyu Pak, Suwon-si, KR;

Sanghyun Han, Hwaseong-si, KR;

Assignee:

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

Attorney:

KILE PARK REED & HOUTTEMAN PLLC

Primary Examiner:

Anthony Ho

Int. Cl.
CPC ...
H10K 50/852 (2023.01); C07C 211/54 (2006.01); C07C 211/61 (2006.01); C07D 209/88 (2006.01); C07D 307/91 (2006.01); C07D 333/76 (2006.01); H10K 50/15 (2023.01); H10K 50/818 (2023.01); H10K 50/828 (2023.01); H10K 50/858 (2023.01); H10K 85/60 (2023.01); H10K 102/00 (2023.01);
U.S. Cl.
CPC ...
H10K 50/852 (2023.02); C07C 211/54 (2013.01); C07C 211/61 (2013.01); C07D 209/88 (2013.01); C07D 307/91 (2013.01); C07D 333/76 (2013.01); H10K 50/15 (2023.02); H10K 50/156 (2023.02); H10K 50/818 (2023.02); H10K 50/828 (2023.02); H10K 50/858 (2023.02); H10K 85/633 (2023.02); H10K 85/636 (2023.02); C07C 2601/14 (2017.05); C07C 2603/18 (2017.05); C07C 2603/74 (2017.05); H10K 85/615 (2023.02); H10K 85/626 (2023.02); H10K 85/6572 (2023.02); H10K 85/6574 (2023.02); H10K 85/6576 (2023.02); H10K 2102/3026 (2023.02); H10K 2102/351 (2023.02);
Abstract

A light emitting diode of an embodiment includes a first electrode, a hole transport region disposed on the first electrode, an emission layer disposed on the hole transport region, an electron transport region disposed on the emission layer, and a second electrode disposed on the electron transport region. The hole transport region includes a first hole transport layer disposed adjacent to the first electrode and having a first refractive index, a second hole transport layer disposed adjacent to the emission layer and having a second refractive index, and a third hole transport layer disposed between the first hole transport layer and the second hole transport layer and having a third refractive index which is greater than each of the first refractive index and the second refractive index, thereby showing high light extraction efficiency and high emission efficiency properties.

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