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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 12133400 B1

PDFFull Text
Date of Patent:
Oct. 29, 2024

Filed:

Jul. 26, 2021

Organic light-emitting device, display device, electronic apparatus, onboard display, and vehicle

Applicant:

Wuhan Tianma Micro-electronics Co., Ltd., China, CN;

Inventors:

Keita Hamada, Kanagawa, JP;

Hiromu Hanashima, Kanagawa, JP;

Shigeru Mori, Kanagawa, JP;

Assignee:

Wuhan Tianma Micro-Electronics Co., Ltd., Wuhan, CN;

Attorney:

Sughrue Mion, PLLC

Primary Examiner:

Moin M Rahman

Int. Cl.
CPC ...
H10K 50/11 (2023.01); B60K 35/60 (2024.01); H10K 50/15 (2023.01); H10K 50/16 (2023.01); H10K 50/17 (2023.01); B60K 35/22 (2024.01); H10K 101/30 (2023.01); H10K 101/40 (2023.01); H10K 102/00 (2023.01);
U.S. Cl.
CPC ...
H10K 50/11 (2023.02); B60K 35/60 (2024.01); H10K 50/15 (2023.02); H10K 50/16 (2023.02); H10K 50/171 (2023.02); B60K 35/22 (2024.01); B60K 2360/1523 (2024.01); H10K 2101/30 (2023.02); H10K 2101/40 (2023.02); H10K 2102/351 (2023.02);
Abstract

An organic light-emitting device includes an anode electrode and a cathode electrode that are arranged facing each other; a light-emitting layer arranged between the anode electrode and the cathode electrode; and a hole transport layer arranged between the anode electrode and the light-emitting layer, and including one or more layers. A layer, of the one or more layers of the hole transport layer, contacting the light-emitting layer has a HOMO energy levelH that is higher than a HOMO energy levelH of the light-emitting layer. A difference ΔE1 between the HOMO energy levelH of the layer contacting the light-emitting layer of the hole transport layer and the HOMO energy levelH of the light-emitting layer is 0.32 eV or less.

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