Invention Grant
- Patent Title: White light-emitting organic electroluminescent element and white light-emitting organic electroluminescent panel
- Patent Title (中): 白色发光有机电致发光元件和白色发光有机电致发光面板
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Application No.: US14006447Application Date: 2012-03-09
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Publication No.: US09184404B2Publication Date: 2015-11-10
- Inventor: Yoshikazu Kuzuoka , Hiroya Tsuji , Hiroyuki Sasaki , Satoshi Ohara , Kazuyuki Yamae
- Applicant: Yoshikazu Kuzuoka , Hiroya Tsuji , Hiroyuki Sasaki , Satoshi Ohara , Kazuyuki Yamae
- Applicant Address: JP Osaka
- Assignee: PANASONIC INTELLECTUAL PROPERTY MANAGEMENT CO., LTD.
- Current Assignee: PANASONIC INTELLECTUAL PROPERTY MANAGEMENT CO., LTD.
- Current Assignee Address: JP Osaka
- Agency: Greenblum & Bernstein, P.L.C.
- Priority: JP2011-066567 20110324
- International Application: PCT/JP2012/056134 WO 20120309
- International Announcement: WO2012/128079 WO 20120927
- Main IPC: H01L29/08
- IPC: H01L29/08 ; H01L35/24 ; H01L51/00 ; H01L51/50 ; H01L27/32
Abstract:
A white light-emitting organic electroluminescent element includes at least four kinds of light-emitting dopants with different emission peak wavelengths which are present between a cathode and an anode. The four kinds of light-emitting dopants include a light-emitting dopant “A”, a light-emitting dopant “B”, a light-emitting dopant “C”, and a light-emitting dopant “D” having their own peak wavelengths which are longer in this order. The white light-emitting organic electroluminescent element has an emission spectrum which satisfies relations of: (first average luminance for an angle in a range of 50° to 70°/first front luminance)>(second average luminance for an angle in a range of 50° to 70°/second front luminance); and (third average luminance for an angle in a range of 50° to 70°/third front luminance)>(fourth average luminance for an angle in a range of 50° to 70°/fourth front luminance).
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