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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 11672171 B1

PDFFull Text
Date of Patent:
Jun. 06, 2023

Filed:

Mar. 15, 2021

Light-emitting device including a plurality of organic electroluminescent elements

Applicant:

Canon Kabushiki Kaisha, Tokyo, JP;

Inventors:

Norifumi Kajimoto, Zama, JP;

Tetsuo Takahashi, Kawasaki, JP;

Koji Ishizuya, Kawasaki, JP;

Itaru Takaya, Atsugi, JP;

Hirokazu Miyashita, Ebina, JP;

Takayuki Ito, Kawasaki, JP;

Hiroaki Sano, Kawasaki, JP;

Assignee:

Canon Kabushiki Kaisha, Tokyo, JP;

Attorney:

Canon U.S.A., Inc IP Division

Primary Examiner:

Shahed Ahmed

Assistant Examiner:

Vicki B Booker

Int. Cl.
CPC ...
H10K 85/60 (2023.01); H10K 50/13 (2023.01); H10K 50/17 (2023.01); H10K 50/818 (2023.01); H10K 50/18 (2023.01); H10K 50/82 (2023.01); H10K 50/852 (2023.01); H10K 50/15 (2023.01); H10K 59/30 (2023.01); H10K 39/32 (2023.01); C07C 211/01 (2006.01); C07C 211/43 (2006.01); C07C 211/00 (2006.01); C07C 211/33 (2006.01); H10K 59/38 (2023.01); H10K 50/16 (2023.01); H01L 27/146 (2006.01); H10K 102/00 (2023.01); H01L 51/00 (2006.01); H01L 51/50 (2006.01); H01L 51/52 (2006.01); H01L 27/32 (2006.01); H01L 27/30 (2006.01);
U.S. Cl.
CPC ...
H01L 51/006 (2013.01); C07C 211/00 (2013.01); C07C 211/01 (2013.01); C07C 211/33 (2013.01); C07C 211/43 (2013.01); H01L 27/307 (2013.01); H01L 27/3206 (2013.01); H01L 51/0061 (2013.01); H01L 51/504 (2013.01); H01L 51/5064 (2013.01); H01L 51/5088 (2013.01); H01L 51/5096 (2013.01); H01L 51/5218 (2013.01); H01L 51/5221 (2013.01); H01L 51/5265 (2013.01); H01L 27/14612 (2013.01); H01L 27/322 (2013.01); H01L 51/0054 (2013.01); H01L 51/0055 (2013.01); H01L 51/0056 (2013.01); H01L 51/0058 (2013.01); H01L 51/0059 (2013.01); H01L 51/0072 (2013.01); H01L 51/5056 (2013.01); H01L 51/5072 (2013.01); H01L 2251/5315 (2013.01); H01L 2251/558 (2013.01);
Abstract

A light-emitting device includes a plurality of organic EL elements. Each of the organic EL elements includes a reflection electrode, a hole transport region, an electron-trapping luminescent layer, and a light extraction electrode in this order. The hole transport region has a sheet resistance of 4.0×10Ω/sq.⋅ or more at a current of 0.1 nA/pixel, and the total thickness of the hole transport region and the electron-trapping luminescent layer is equivalent to an optical path length enabling emission from the electron-trapping luminescent layer to be enhanced.

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