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:
Jul. 12, 2005
Filed:
Feb. 06, 2002
Naoyuki Ueda, Kanagawa, JP;
Ichinori Takada, Kanagawa, JP;
Tetsuo Shibanuma, Kanagawa, JP;
Mari Ichimura, Kanagawa, JP;
Shinichiro Tamura, Kanagawa, JP;
Naoyuki Ueda, Kanagawa, JP;
Ichinori Takada, Kanagawa, JP;
Tetsuo Shibanuma, Kanagawa, JP;
Mari Ichimura, Kanagawa, JP;
Shinichiro Tamura, Kanagawa, JP;
Sony Corporation, Tokyo, JP;
Abstract
An organic electroluminescent device capable of blue emission with a high color purity, and a display unit capable of full-color display with high color expressivity by using the organic electroluminescent device are provided. The organic electroluminescent device includes at least a hole transportation layer and a luminescent layer held between a lower electrode to become an anode and an upper electrode to become a cathode in a state of lamination in that order from the anode side. The luminescent layer is made of a spiro compound, and the hole transportation layer is made of triphenylamine tetramer. Furthermore, the display unit includes organic electroluminescent devices as blue-emitting elements arrayed for a plurality of pixels.