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:
Jan. 29, 2013
Filed:
Jul. 23, 2008
Masaru Kinoshita, Kanagawa, JP;
Manabu Tobise, Kanagawa, JP;
Masaru Kinoshita, Kanagawa, JP;
Manabu Tobise, Kanagawa, JP;
UDC Ireland Limited, Dublin, IE;
Abstract
There is provided an organic electroluminescent devicehaving an anode, a cathodedisposed facing the anode, and an organic layerthat is sandwiched between the anode and the cathode and that includes at least a light emitting layer, wherein the light emitting layer includes a light emitting material having hole transportability, a host material having electron transportability and an electrically inert material, and the concentration of the light emitting material having hole transportability gradually increases from the cathode side toward the anode side. Preferably, the concentration of the electrically inert material also gradually increases from the cathode side toward the anode side.