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:
Apr. 21, 2015
Filed:
Jan. 16, 2013
Panasonic Corporation, Osaka, JP;
Kenji Harada, Hyogo, JP;
Seiji Nishiyama, Osaka, JP;
Takahiro Komatsu, Osaka, JP;
Takayuki Takeuchi, Hyogo, JP;
Satoru Ohuchi, Osaka, JP;
Yoshiaki Tsukamoto, Osaka, JP;
Shinya Fujimura, Osaka, JP;
Kei Sakanoue, Fukuoka, JP;
Panasonic Corporation, Osaka, JP;
Abstract
In an organic EL element, a bank is formed on a hole injection layer so as to surround light-emitting layer. The hole injection layer is formed with a tungsten oxide thin film, and has, in an electronic state thereof, an occupied energy level 1.8 eV to 3.6 eV lower than the lowest energy level of a valence band of the hole injection layer. The hole injection layer has a recessed portion in an upper surface thereof. An inner surface of the recessed portion is in contact with a functional layer (light-emitting layer). the inner side surface of the recessed portion includes an upper edge that is one of aligned with part of a lower edge of the bank, the part being in contact with the functional layer, and in contact with a bottom surface of the bank.