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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 11257981 B1

PDFFull Text
Date of Patent:
Feb. 22, 2022

Filed:

Jul. 27, 2018

Quantum dot and wavelength converting member, lighting member, back light unit, and display device using quantum dot, and method of producing quantum dot

Applicant:

Ns Materials Inc., Fukuoka, JP;

Inventors:

Kazunori Iida, Fukuoka, JP;

Emi Tsutsumi, Fukuoka, JP;

Yuko Ogura, Fukuoka, JP;

Masanori Tanaka, Fukuoka, JP;

Soichiro Nikata, Fukuoka, JP;

Yuka Takamizuma, Fukuoka, JP;

Assignee:

NS MATERIALS INC., Fukuoka, JP;

Attorney:

Greenblum & Bernstein, P.L.C.

Primary Examiner:

Sue A Purvis

Assistant Examiner:

Scott Stowe

Int. Cl.
CPC ...
H01L 33/00 (2010.01); B82Y 40/00 (2011.01); H01L 33/06 (2010.01); B82Y 15/00 (2011.01); G02F 1/13357 (2006.01); H01L 33/50 (2010.01);
U.S. Cl.
CPC ...
H01L 33/06 (2013.01); B82Y 15/00 (2013.01); B82Y 40/00 (2013.01); G02F 1/133603 (2013.01); H01L 33/504 (2013.01);
Abstract

The present invention seeks to provide cadmium-free quantum dots with a narrow fluorescence FWHM. The quantum dot does not contain cadmium and its fluorescence FWHM is 30 nm or less. The quantum dot is preferably a nanocrystal containing zinc and tellurium or zinc and tellurium and sulfur or zinc and tellurium and selenium and sulfur. Further, the quantum dot preferably has a core-shell structure in which the nanocrystal serves as a core and the surface of the core is coated with a shell.

Find Patent Forward Citations

Iida, Kazunori. (2022). Quantum dot and wavelength converting member, lighting member, back light unit, and display device using quantum dot, and method of producing quantum dot (U.S. Patent No. 11257981). U.S. Patent and Trademark Office. https://idiyas.com/patent/badge/11257981

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

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