Invention Grant
- Patent Title: Organic EL element having a plurality of light emitting layers
- Patent Title (中): 有机EL元件具有多个发光层
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Application No.: US12280080Application Date: 2007-02-07
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Publication No.: US08049232B2Publication Date: 2011-11-01
- Inventor: Masahiro Minagawa
- Applicant: Masahiro Minagawa
- Applicant Address: JP Niigata
- Assignee: Nippon Seiki Co., Ltd.
- Current Assignee: Nippon Seiki Co., Ltd.
- Current Assignee Address: JP Niigata
- Agency: McDermott Will & Emery LLP
- Priority: JP2006-041923 20060220
- International Application: PCT/JP2007/052077 WO 20070207
- International Announcement: WO2007/097192 WO 20070830
- Main IPC: H01L33/08
- IPC: H01L33/08 ; H01L33/26 ; H01L51/50

Abstract:
To provide an organic EL element in which the hue of display light can be restrained from varying according to a change of the viewing angle. The organic EL element includes: a first electrode (anode) 4 having translucency; an organic layer 7 at least including a charge injection transport layer (hole injection transport layer) 7a formed on the first electrode 4, and a plurality of light-emitting layers 7b, 7c formed on the charge injection transport layer 7a and different in emission color; and a second electrode (cathode) 8 formed on the organic layer 7. The organic EL element is characterized in that a total film thickness T of the first electrode 4 and the charge injection transport layer 7a is in such a range that change of hue of display light according to a viewing angle θ cannot be recognized.
Public/Granted literature
- US20100224863A1 ORGANIC EL ELEMENT Public/Granted day:2010-09-09
Information query
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