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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 9818984 B1

PDFFull Text
Date of Patent:
Nov. 14, 2017

Filed:

Mar. 25, 2014

Organic electroluminescence element, image-forming apparatus, display apparatus, and imaging apparatus

Applicant:

Canon Kabushiki Kaisha, Tokyo, JP;

Inventor:

Nobutaka Mizuno, Tokyo, JP;

Assignee:

CANON KABUSHIKI KAISHA, Tokyo, JP;

Attorney:

Fitzpatrick, Cella, Harper & Scinto

Primary Examiner:

Bumsuk Won

Assistant Examiner:

Jacob R Stern

Int. Cl.
CPC ...
H01L 29/08 (2006.01); H01L 51/52 (2006.01); G03G 15/04 (2006.01); G03B 17/18 (2006.01); H01L 51/50 (2006.01); H05B 33/24 (2006.01); H01L 51/00 (2006.01);
U.S. Cl.
CPC ...
H01L 51/5275 (2013.01); G03B 17/18 (2013.01); G03G 15/04036 (2013.01); G03G 15/04045 (2013.01); H01L 51/5056 (2013.01); H01L 51/5072 (2013.01); H01L 51/5088 (2013.01); H01L 51/5092 (2013.01); H01L 51/5218 (2013.01); H01L 51/0054 (2013.01); H01L 51/0059 (2013.01); H01L 51/0072 (2013.01); H01L 2251/55 (2013.01); H01L 2251/558 (2013.01); H05B 33/24 (2013.01);
Abstract

Provided is an organic electroluminescence element improved in emission efficiency. The organic electroluminescence element includes: a reflective electrode; a light exiting side electrode; an emission layer provided between the reflective electrode and the light exiting side electrode; and at least one low-refractive index layer provided between the reflective electrode and the emission layer, the low-refractive index layer having a refractive index lower than the refractive index of the emission layer. An optical path Lbetween the maximum emission surface of the emission layer and the reflection surface of the reflective electrode, and an optical path Lbetween the reflection interface on an emission layer side of the low-refractive index layer and the maximum emission surface of the emission layer satisfy specific expressions.

Find Patent Forward Citations

Mizuno, Nobutaka. (2017). Organic electroluminescence element, image-forming apparatus, display apparatus, and imaging apparatus (U.S. Patent No. 9818984). U.S. Patent and Trademark Office. https://idiyas.com/patent/badge/9818984

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