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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 12740223 B1

PDFFull Text
Date of Patent:
Sep. 15, 2026

Filed:

Mar. 31, 2021

Electroluminescent element, light-emitting device, and method for producing electroluminescent element

Applicants:

Sharp Kabushiki Kaisha, Sakai City, JP;

Toppan Inc., Tokyo, JP;

Inventors:

Yusuke Sakakibara, Sakai City, JP;

Kazuki Goto, Sakai City, JP;

Masaki Yamamoto, Sakai City, JP;

Tatsuya Ryohwa, Sakai City, JP;

Mikihiro Takasaki, Chikushino-city, JP;

Yuka Takamizuma, Chikushino-city, JP;

Hironori Matsuzawa, Chikushino-city, JP;

Assignees:

SHARP KABUSHIKI KAISHA, Sakai City, JP;

TOPPAN INC., Tokyo, JP;

Attorney:

Keating & Bennett, LLP

Primary Examiner:

Shahan Ur Rahaman

Int. Cl.
CPC ...
H10K 50/10 (2023.01); C09K 11/08 (2006.01); H10K 50/115 (2023.01); H10K 50/15 (2023.01); H10K 50/16 (2023.01); H10K 71/60 (2023.01); H10K 102/00 (2023.01);
U.S. Cl.
CPC ...
H10K 50/10 (2023.02); C09K 11/0811 (2013.01); H10K 50/115 (2023.02); H10K 50/15 (2023.02); H10K 50/16 (2023.02); H10K 71/60 (2023.02); H10K 2102/351 (2023.02);
Abstract

A light-emitting element includes an anode electrode, a QD layer containing QDs, and a cathode electrode, in which the QDs have a core-shell structure including a core and a shell and are Cd-free QDs that emit blue light, the QDs contain halogen elements, and an external quantum efficiency percentage of the light-emitting element is 7% or more.

Find Patent Forward Citations

Sakakibara, Yusuke. (2026). Electroluminescent element, light-emitting device, and method for producing electroluminescent element (U.S. Patent No. 12740223). U.S. Patent and Trademark Office. https://idiyas.com/patent/badge/12740223

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

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