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. 28, 2009
Filed:
Mar. 14, 2005
Kazuhito Masuda, Hitachi, JP;
Shingo Ishihara, Yonezawa, JP;
Sukekazu Aratani, Hitachiota, JP;
Masaya Adachi, Hitachi, JP;
Kazuhito Masuda, Hitachi, JP;
Shingo Ishihara, Yonezawa, JP;
Sukekazu Aratani, Hitachiota, JP;
Masaya Adachi, Hitachi, JP;
Hitachi Displays, Ltd., Chiba, JP;
Abstract
It is an object of the present invention to provide an organic light-emitting display of high light-emitting efficiency. The organic light-emitting element comprising a board, upper electrode, lower electrode, a plurality of light-emitting units placed between the upper and lower electrodes, and a charge-generating layer placed between a plurality of the light-emitting units, wherein one of the light-emitting units has a layer for emitting monochromatic light and one of the light-emitting units has a layer for emitting polychromatic light, the former unit having an equivalent or lower light-emitting efficiency than the latter unit.