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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 12648347 B1

PDFFull Text
Date of Patent:
Jun. 02, 2026

Filed:

Mar. 26, 2020

Light emitting element and display device

Applicant:

Sharp Kabushiki Kaisha, Sakai City, JP;

Inventors:

Masanobu Mizusaki, Sakai City, JP;

Masakazu Shibasaki, Sakai City, JP;

Assignee:

SHARP KABUSHIKI KAISHA, Sakai City, JP;

Attorney:

ScienBiziP, P.C.

Primary Examiner:

Andrew K Bohaty

Int. Cl.
CPC ...
H01L 51/54 (2006.01); H10K 50/15 (2023.01); H10K 85/30 (2023.01); H10K 85/60 (2023.01); H10K 50/16 (2023.01); H10K 50/165 (2023.01); H10K 50/18 (2023.01); H10K 101/30 (2023.01); H10K 102/00 (2023.01);
U.S. Cl.
CPC ...
H10K 85/30 (2023.02); H10K 50/156 (2023.02); H10K 85/654 (2023.02); H10K 85/6572 (2023.02); H10K 50/165 (2023.02); H10K 50/166 (2023.02); H10K 50/18 (2023.02); H10K 2101/30 (2023.02); H10K 2102/302 (2023.02);
Abstract

A light-emitting element is provided with an interlayer organic layer having electron transport properties. At a HOMO level, an energy level difference between a first hole transport layer and the second hole transport layer is from 0.0 eV to 0.20 eV, and at a LUMO level, an energy level difference between a first electron transport layer and a second electron transport layer, and an energy level difference between the first electron transport layer and the blue light-emitting layer are each from 0.0 eV to 0.20 eV. Alternatively, the light-emitting element is provided with the interlayer organic layer between the electron transport layer and the cathode electrode, the electron transport layer is formed from a lithium quinolate complex and an organic compound having electron transport properties, and the interlayer organic layer is formed from an organic compound including an amino group or a hydroxyl group.

Find Patent Forward Citations

Mizusaki, Masanobu. (2026). Light emitting element and display device (U.S. Patent No. 12648347). U.S. Patent and Trademark Office. https://idiyas.com/patent/badge/12648347

Data source: USPTO (United States Patent and Trademark Office) public patent records. Weekly synchronization. How IDiyas builds this profile

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