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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 12408506 B1

PDFFull Text
Date of Patent:
Sep. 02, 2025

Filed:

Jan. 22, 2021

Organic light emitting device and display apparatus

Applicant:

Boe Technology Group Co., Ltd., Beijing, CN;

Inventors:

Guanyin Wen, Beijing, CN;

Yansong Li, Beijing, CN;

Xiaobo Du, Beijing, CN;

Assignee:

BOE Technology Group Co., Ltd., Beijing, CN;

Attorneys:

Ling Wu

Stephen Yang

Ling and Yang Intellectual Property

Primary Examiner:

Jarrett J Stark

Int. Cl.
CPC ...
H10K 50/11 (2023.01); H10K 50/12 (2023.01); H10K 50/13 (2023.01); H10K 50/18 (2023.01); H10K 59/12 (2023.01); H10K 101/10 (2023.01); H10K 101/40 (2023.01); H10K 102/00 (2023.01);
U.S. Cl.
CPC ...
H10K 50/13 (2023.02); H10K 50/121 (2023.02); H10K 50/181 (2023.02); H10K 59/12 (2023.02); H10K 2101/10 (2023.02); H10K 2101/40 (2023.02); H10K 2102/351 (2023.02);
Abstract

Provided is an organic light emitting device, including a first electrode, second electrode, and first and second emitting layers that are disposed between first and second electrodes. The first emitting layer is located on a side of the second emitting layer close to the first electrode. The first emitting layer includes a first host material and first dopant material. The second emitting layer includes a second host material different from the first host material, and second dopant material. An electron block layer disposed between first emitting layer and first electrode, first emitting layer and second emitting layer satisfy:|HOMO<|HOMO|<HOMO|,|HOMO−HOMO|=0.2 eV to 0.4 eV,

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