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.:
Date of Patent:
Jun. 23, 2020
Filed:
Mar. 16, 2017
Applicant:
Sharp Kabushiki Kaisha, Sakai, Osaka, JP;
Inventors:
Asae Ito, Sakai, JP;
Manabu Niboshi, Sakai, JP;
Yuto Tsukamoto, Sakai, JP;
Shinichi Kawato, Sakai, JP;
Assignee:
SHARP KABUSHIKI KAISHA, Sakai, JP;
Attorney:
Primary Examiner:
Int. Cl.
CPC ...
H01L 51/50 (2006.01); H01L 51/52 (2006.01); H01L 27/32 (2006.01); H01L 51/00 (2006.01);
U.S. Cl.
CPC ...
H01L 51/5016 (2013.01); H01L 27/322 (2013.01); H01L 27/3246 (2013.01); H01L 51/001 (2013.01); H01L 51/5032 (2013.01); H01L 51/5044 (2013.01); H01L 51/5088 (2013.01); H01L 51/5206 (2013.01); H01L 51/5221 (2013.01); H01L 2251/5376 (2013.01);
Abstract
Provided is an EL element utilizing upconversion light emission involving highly efficient triplet-triplet annihilation. A blue-light-emitting layer includes an ionic liquid, a red phosphorescent material, and a blue fluorescent material. The blue fluorescent material and the red phosphorescent material are homogeneously dispersed in a liquid film of the ionic liquid.