Invention Grant
- Patent Title: Electroluminescence device
- Patent Title (中): 电致发光器件
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Application No.: US12480963Application Date: 2009-06-09
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Publication No.: US08207665B2Publication Date: 2012-06-26
- Inventor: Takahiro Ibe
- Applicant: Takahiro Ibe
- Applicant Address: JP
- Assignee: Semiconductor Energy Laboratory Co., Ltd.
- Current Assignee: Semiconductor Energy Laboratory Co., Ltd.
- Current Assignee Address: JP
- Agency: Husch Blackwell LLP
- Priority: JP2003-020152 20030129
- Main IPC: H05B33/12
- IPC: H05B33/12

Abstract:
An organic EL element has excellent features as compared with other electroluminescent elements, but on the other hand, has a problem that the life of the element is not sufficiently long. In addition, since the organic EL element is expected to be applied to a mobile display and the like, it is also important to improve power efficiency. Hence, an object of the invention is to provide an element structure to realize an improvement in power efficiency and an improvement in the life of the element at the same. In the construction of an organic EL element of the invention, the first electroluminescent film 303 is sandwiched by the first anode 302 and a cathode 304, and the second electroluminescent film 305 and the second anode 306 are laminated over the cathode 304. At this time, the first anode 302 is put into contact with the second anode 306 to form a parallel circuit to decrease an electric current passing through the respective electroluminescent films.
Public/Granted literature
- US20100051990A1 Electroluminescence Device Public/Granted day:2010-03-04
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