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:
Jun. 28, 2022
Filed:
Mar. 13, 2019
Applicant:
Ricoh Company, Ltd., Tokyo, JP;
Inventors:
Naoyuki Ueda, Kanagawa, JP;
Yuki Nakamura, Tokyo, JP;
Yukiko Abe, Kanagawa, JP;
Shinji Matsumoto, Kanagawa, JP;
Yuji Sone, Kanagawa, JP;
Ryoichi Saotome, Kanagawa, JP;
Sadanori Arae, Kanagawa, JP;
Minehide Kusayanagi, Kanagawa, JP;
Yuichi Ando, Hyogo, JP;
Assignee:
RICOH COMPANY, LTD., Tokyo, JP;
Attorney:
Primary Examiner:
Int. Cl.
CPC ...
H01L 27/15 (2006.01); G09G 3/32 (2016.01); H01L 33/18 (2010.01); H01L 33/26 (2010.01); H05B 33/14 (2006.01); H01L 27/12 (2006.01);
U.S. Cl.
CPC ...
H01L 27/156 (2013.01); G09G 3/32 (2013.01); H01L 33/18 (2013.01); H01L 33/26 (2013.01); G09G 2300/08 (2013.01); G09G 2320/043 (2013.01);
Abstract
An inorganic EL element including: an anode; a hole transporting layer; a light emitting layer; an electron transporting layer; and a cathode, the anode, the hole transporting layer, the light emitting layer, the electron transporting layer, and the cathode being stacked, wherein the hole transporting layer is an oxide film, the light emitting layer is an oxide film, and the electron transporting layer is an oxide film.