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Title:
ORGANIC, DISPERSION-TYPE EL LUMINESCENT BODY
Document Type and Number:
Japanese Patent JPH03192689
Kind Code:
A
Abstract:

PURPOSE: To lower current density and obtain a dispersion-type EL luminescent body with high luminance efficiency and improved luminance irregularity by allowing a surfactant to exist on a luminescent layer formed with a mixture consisting of an organic binder and a phosphor substance.

CONSTITUTION: In the case of dispersing a phosphor substance in an organic binder and forming a film, a surfactant is allowed to exist in the phosphor substance and the organic binder and/or a surfactant is allowed to exist in a highly dielectric substance such as a barium titanate power, etc., and the organic binder. The surfactant-containing mixture is applied to a back side electrode 1, or an insulating layer 2, or a substrate film with a desired thickness to give an insulating layer 2 and a luminescent layer 3 and then a transparent electrode layer 4 of ITO, etc., is formed. If necessary, a humidity absorbing film 5 is formed further to cover them and the whole body is sealed with a humidity proof film 6. In this way, irregularity of luminance is eliminated and high luminance, high efficiency, low driving voltage, etc., are achieved.


Inventors:
FUJII HIDEYO
NAKATSUKA KIYOHARU
Application Number:
JP33315489A
Publication Date:
August 22, 1991
Filing Date:
December 21, 1989
Export Citation:
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Assignee:
SUMITOMO CHEMICAL CO
International Classes:
H05B33/20; G09F13/22; H05B33/12; (IPC1-7): G09F13/22; H05B33/20
Attorney, Agent or Firm:
Mitsuhiro Moroishi (1 person outside)



 
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