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:
Mar. 22, 2022
Filed:
Dec. 27, 2017
Xianyang Chvt New Display Technology Co., Ltd., Xianyang, CN;
Junichi Tanaka, Yonezawa, JP;
XIANYANG CHVT NEW DISPLAY TECHNOLOGY CO., LTD., Xianyang, CN;
Abstract
This organic electroluminescent element comprises a light emission unit between a first electrode and a second electrode, wherein the relational expression nEML>nETL is satisfied in a light emission layer of the light emission unit that is closest to the first electrode, when a maximum emission wavelength (λ) is the wavelength at which an emission intensity (P(λ)) that includes spectral luminous efficiency is maximized, said emission intensity (P(λ)) that includes spectral luminous efficiency being calculated from formula (1), nEML is the refractive index of the light emission layer at the maximum emission wavelength (λmax), and nETL is the refractive index of an electron transport layer. Formula (1): P(λ)=P(λ)×V(λ) (Where P(λ): emission intensity that includes spectral luminous efficiency, P(λ): emission intensity, and V(λ): spectral luminous efficiency are all functions of the wavelength λ.)