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:
May. 03, 2011
Filed:
Dec. 25, 2003
Yuichiro Itai, Kanagawa, JP;
Tasuku Satoh, Kanagawa, JP;
Yoshiaki Sakamoto, Kanagawa, JP;
Toshiro Takahashi, Kanagawa, JP;
Masaru Kinoshita, Kanagawa, JP;
Yuichiro Itai, Kanagawa, JP;
Tasuku Satoh, Kanagawa, JP;
Yoshiaki Sakamoto, Kanagawa, JP;
Toshiro Takahashi, Kanagawa, JP;
Masaru Kinoshita, Kanagawa, JP;
Fujifilm Corporation, Tokyo, JP;
Abstract
An object of the present invention is to enable suppression of a leak current of an organic EL element while improving a conductivity of the organic EL element and suppressing an operation voltage thereof. An organic EL element is used which comprises at least a luminescent layer, a hole transport layer adjacent to a positive-electrode side of the luminescent layer, and an electron injection transport layer adjacent to a negative-electrode side of the luminescent layer, wherein a hole injection layer is provided between the hole transport layer and the positive electrode, and the conductivity of the hole injection layer continuously changes along a thickness direction of the hole injection layer.