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Title:
GRAINS-DISPERSED TYPE EL ELEMENT
Document Type and Number:
Japanese Patent JPH0451493
Kind Code:
A
Abstract:

PURPOSE: To obtain a grains-dispersed type EL element providing high electroluminescent efficiency, and also providing characteristics control facility by distributing fluorescent bodies present in an electroluminescent layer in a laminar shape respectively in the direction of thickness of the layer in accordance with a difference in each of characteristics between the fluorescent bodies.

CONSTITUTION: In a grains-dispersed type EL element comprising a dielectric layer 2, an electroluminescent layer 3 and a hyaline electrode 4 sequentially formed on a back electrode 1 at least, fluorescent bodies present in the electroluminescent layer are respectively distributed in a laminar shape in the direction of thickness of the layer in accordance with a difference in each of characteristics (brightness, service life, electroluminescent colors, grain diameters, electroluminescent efficiency, etc.) between the fluorescent bodies. The electroluminescent layer 3 for example is formed by sifting fluorescent grains into a group of grains 3A each having large grain diameter and another group of grains 3B each having small grain diameter, mixedly dispersing these sifted grains into a binder in the ratio 4:1, applying and drying the large- diameter grains 3A first on the dielectric layer, and applying and drying the small-diameter grains 3B on the resultant large-diameter grain film.


Inventors:
WADA TAMOTSU
Application Number:
JP15953390A
Publication Date:
February 19, 1992
Filing Date:
June 18, 1990
Export Citation:
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Assignee:
STANLEY ELECTRIC CO LTD
International Classes:
H05B33/14; H05B33/12; (IPC1-7): H05B33/14
Attorney, Agent or Firm:
Akimoto Teruo