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:
Feb. 15, 2022
Filed:
Nov. 14, 2019
Canon Kabushiki Kaisha, Tokyo, JP;
Itaru Takaya, Atsugi, JP;
Naoki Yamada, Inagi, JP;
Canon Kabushiki Kaisha, Tokyo, JP;
Abstract
A white organic electroluminescent (EL) element including an anode, a cathode, and a light-emitting layer disposed between the anode and the cathode. The light-emitting layer includes a first light-emitting layer and a second light-emitting layer. The first light-emitting layer and the second light-emitting layer each contain a host material and a light-emitting dopant material. The first light-emitting layer contains, as the light-emitting dopant material, a green-light-emitting dopant material and a blue-light-emitting dopant material and is a dual-color light-emitting layer that emits green light and blue light. The second light-emitting layer contains, as the light-emitting dopant material, a red-light-emitting dopant material and a green-light-emitting dopant material and is a dual-color light-emitting layer that emits red light and green light.