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:
Oct. 16, 2018
Filed:
Jun. 11, 2015
Sharp Kabushiki Kaisha, Sakai, Osaka, JP;
Shinichi Kawato, Sakai, JP;
Katsuhiro Kikuchi, Sakai, JP;
Satoshi Inoue, Sakai, JP;
Takashi Ochi, Sakai, JP;
Yuhki Kobayashi, Sakai, JP;
Kazuki Matsunaga, Sakai, JP;
Eiichi Matsumoto, Mitsuke, JP;
Masahiro Ichihara, Mitsuke, JP;
SHARP KABUSHIKI KAISHA, Sakai, JP;
Abstract
In an organic EL element including a positive electrode, a negative electrode, and a light emitting layer (recombination layer) provided between the positive electrode and the negative electrode, an electron transport layer and an electron injection layer are provided between the light emitting layer and the negative electrode, and are sequentially arranged in the direction from the light emitting layer to the negative electrode. A hole injection layer and a hole transport layer are provided between the light emitting layer and the positive electrode, and are sequentially arranged in the direction from the positive electrode to the light emitting layer. A buffer layer for suppressing the electron trapping properties is provided between the light emitting layer and the hole transport layer.