Invention Grant
- Patent Title: Organic electroluminsescence element and lighting device
- Patent Title (中): 有机电致发光元件和照明装置
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Application No.: US14403681Application Date: 2013-05-30
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Publication No.: US09553278B2Publication Date: 2017-01-24
- Inventor: Varutt Kittichungchit , Kazuyuki Yamae
- Applicant: PANASONIC INTELLECTUAL PROPERTY MANAGEMENT CO., LTD.
- 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: JP2012-126468 20120601
- International Application: PCT/JP2013/003412 WO 20130530
- International Announcement: WO2013/179668 WO 20131205
- Main IPC: H01L51/54
- IPC: H01L51/54 ; H01L51/50 ; H01L51/52

Abstract:
The disclosure relates to an organic electroluminescence element including an organic layer including multiple light-emitting layers. The light-emitting layers include a blue light-emitting layer including a blue light-emitting dopant. In a case where emission color of the organic electroluminescence element operated at an operation temperature for a stable state is represented in a CIE1931 chromaticity coordinate system, when coordinate point A of the emission color at an early stage of use and coordinate point B of the emission color deteriorated by use are represented by (x1, y1) and (x2, y2) respectively, a relation of y2≧y1 is satisfied. When amounts of changes in x and y values from coordinate point A to coordinate point B are represented by equations of Δx=x2−x1 and Δy=y2−y1 respectively, a relation of Δy≧Δx is satisfied. It can be made difficult to perceive change in emission color and lifetime can be prolonged
Public/Granted literature
- US20150171360A1 ORGANIC ELECTROLUMINSESCENCE ELEMENT AND LIGHTING DEVICE Public/Granted day:2015-06-18
Information query
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