High contrast electroluminescent displays

Details High contrast electroluminescent displays High contrast electroluminescent displays

1988-05-24

1989-08-22

Wieder, Kenneth

Electric lamp and discharge devices

With luminescent solid or liquid material

Solid-state type

313503, 313509, H05B 3322

Patent

active

048599042

ABSTRACT:
A d.c. or a.c. electroluminescent panel comprises a transparent substrate, a transparent first electrode film, a thin film phosphor layer, a black or dark powder back layer of electrically conductive material, and a second electrode film. Application of a voltage across the phosphor layer causes it to emit light. In this invention, the black powder back-layer significantly enhances the contrast of the panel.

REFERENCES:
patent: 3283194 (1966-11-01), Rulon
patent: 3854070 (1974-12-01), Vlasenko et al.
patent: 4137481 (1979-01-01), Hilsum et al.
Higton, "High Contrast Thin-film/Powder Composit DCEL Devices", Phosphor Products Co. Ltd., Poole England, pp. 29-33, 1984.

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