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Patent Searching and Data


Title:
ORGANIC ELECTROLUMINESCENCE ELEMENT
Document Type and Number:
Japanese Patent JPH10312882
Kind Code:
A
Abstract:

To prevent the expansion of a dark spot and the degradation of a light emitting characteristic even if an element is left under a high temperature- high humidity condition by providing a pedestal fixed with an organic electroluminescence element where as least are organic layer is formed substrate between a pair of electrodes formed on a substrate and a cap welded to the pedestal so as to cover the element.

An electron hole transport layer 3, a light emitting layer 4 and an Al/Li electrode as a cathode 5 are deposited in order on a material by performing a transparent ITO electrode on a glass substrate 1 as an anode, and are fixed to an electrode extraction part 7 arranged in the pedestal 6 by using conductive paste. A metallic cap 9 having a light taking-out window 8 and the pedestal 6 are welded and joined together. A light emitting characteristic before and after a test of this element changes, for example, from 3500 cd/m2 to 2800 cd/m2, and a dark spot diameter, from 20 μm to 25 μm, and an element having no metallic cap does not emit the light in 3600 cd/m2, and the dark spot diameter changed from 18 μm to 500 μm or more. Since the pedestal 6 and the cap 9 are joined together, infiltration of water is eliminated, and the exertion of damage on the element can be prevented.


Inventors:
FUKUYAMA MASAO
SUZUKI MUTSUMI
Application Number:
JP12122797A
Publication Date:
November 24, 1998
Filing Date:
May 12, 1997
Export Citation:
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Assignee:
MATSUSHITA ELECTRIC IND CO LTD
International Classes:
H05B33/04; H01L51/50; H05B33/12; H01L51/52; (IPC1-7): H05B33/04
Attorney, Agent or Firm:
Masahiro Kurai