White-light emitting electroluminescent display device and manuf

Details White-light emitting electroluminescent display device and manuf White-light emitting electroluminescent display device and manuf

1996-12-12

1999-09-21

Patel, Ashok

Electric lamp and discharge devices

With luminescent solid or liquid material

Solid-state type

313506, 313509, H05B 3314

Patent

active

059558350

ABSTRACT:
An improved white-light emitting electroluminescent display device and a manufacturing method thereof capable of advantageously generating a light having a red, blue, and green wave lengths within a unique material, which includes a substrate; a lower electrode disposed on the substrate; a first dielectric layer disposed on the lower electrode; a ZnS:Pr,Mn light-emitting layer disposed on the first dielectric layer; a second dielectric layer; and an upper electrode disposed on the second dielectric layer. In addition, a fabrication method thereof includes the steps of forming a first dielectric layer on an upper electrode; forming a light-emitting layer on the first dielectric layer by depositing a ZnS:Pr,Mn luminescent material made of Pr of 1.4.about.0.5 mol % and Mn of 0.1.about.0.01 mol % on a ZnS host material; forming a second dielectric layer on the light-emitting layer; and forming a lower electrode on the second dielectric layer.

REFERENCES:
patent: 4643639 (1987-02-01), Kawai
patent: 4733128 (1988-03-01), Tohda et al.
patent: 5003221 (1991-03-01), Shimizu
patent: 5200277 (1993-04-01), Nakayama et al.
patent: 5352543 (1994-10-01), Ryu
patent: 5476727 (1995-12-01), Maruta
S. Tanaka et al., "Bright White-Light Electroluminescent Devices With New Phosphor Thin-Films Based on SrS", SID 88 Digest, pp. 293-296 no month.

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