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:
Dec. 14, 2010
Filed:
Sep. 26, 2006
Masato Sawada, Kanagawa-ken, JP;
Akihiro Ooishi, Kanagawa-ken, JP;
Masato Sawada, Kanagawa-ken, JP;
Akihiro Ooishi, Kanagawa-ken, JP;
Kabushiki Kaisha Toshiba, Tokyo, JP;
Abstract
A light emitting device includes: a light emitting layer; an n-type contact layer made of a compound provided on the light emitting layer; a composition modulation layer provided on the n-type contact layer; and a transparent electrode provided on the composition modulation layer. The composition modulation layer consists of a plurality of elements which constitute the compound. A composition ratio of one of the plurality of elements is higher in the composition modulation layer than in the compound. Alternatively, the light emitting device includes: a light emitting layer; an n-type contact layer made of a compound provided on the light emitting layer; a metal layer provided on the n-type contact layer; and a transparent electrode provided on the metal layer. The metal layer is made of a metal having a lower work function than the compound.