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:
Jul. 17, 2018
Filed:
May. 24, 2016
Kaneka Corporation, Osaka-shi, Osaka, JP;
Naomi Nagai, Otsu, JP;
Hirotaka Umezaki, Kamikita-gun, JP;
Kaneka Corporation, Osaka-shi, Osaka, JP;
Abstract
A white light-emitting organic EL panel is high in color rendering properties and is excellent in hue stability. The panel includes a light-emitting functional layer that has a blue light anode side unit, a connection layer, and a red-green light cathode side unit. The connection layer injects electrons into the blue light anode side and injects holes into the red-green light cathode side when current is applied. The red-green light cathode side unit includes a red-green phosphorescent light-emitting layer composed of a red phosphorescent material, a green phosphorescent material, and a host material for the phosphorescent light-emitting layer. The maximum emission peak wavelength of the red and green phosphorescent materials are 60 nm or more apart, and the panel is capable of emitting white light with a general color rendering index and a special color rendering index greater than or equal to 90.