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:
Dec. 16, 2025
Filed:
Oct. 27, 2021
Kaneka Corporation, Osaka, JP;
Naomi Nagai, Otsu, JP;
KANEKA CORPORATION, Osaka, JP;
Abstract
An organic electroluminescent element capable of emitting white light having a low color temperature and high color rendering properties with practical power efficiency includes a light-pervious substrate, a light-pervious anode layer, a light-emitting functional layer, and a metal cathode layer. The functional layer includes a green red light emitting unit, a unit connection mechanism, and a blue light emitting unit. The green red light emitting unit includes a green red mixed phosphorescent light-emitting layer containing a host material for a phosphorescent light-emitting layer, and the blue light emitting unit includes a hole transport adjustment layer adjacent to a blue fluorescent light-emitting layer on a side of the unit connection mechanism. White light can be emitted from the light emission surface with a correlated color temperature TCP of 2200 K to 3000 K and a color rendering property Ra of 80 or more.