Enhanced single layer multi-color luminescent display with coact

Details Enhanced single layer multi-color luminescent display with coact Enhanced single layer multi-color luminescent display with coact

1989-04-13

1991-01-22

Wieder, Kenneth

Electric lamp and discharge devices

With luminescent solid or liquid material

Solid-state type

313503, 313506, 428690, H05B 3314

Patent

active

049873393

ABSTRACT:
The invention is an enhanced single-layer, multi-color luminescent display 10' comprising an insulator substrate 11' and a single layer of host material 13' having a smooth, flat top surface deposited thereon that hosts one or more different activators, therein forming a pattern of selected and distinctly colored phosphor areas 14', 16' and 17' which may be green, red and blue respectively in the single layer of host material 13'. Transparent electrical conductor means 12' may be provided for subjecting selected areas of the pattern of colored phosphor areas to an electric field thereby forming a multi-color, single layer electroluminescent display. A coactivator such as phosphorus (P) may be selectively introduced into one or more of the phosphor areas 16' and 17' to enhance the brilliance of the color or colors of the one or more selected phosphor areas without changing the electric field.
A method of forming a multi-color luminescent display incudes the steps of depositing on an insulator substrate 10', a single layer of host material 12' with the properties to host varying quantities of different activators and a common activator into selected areas 14', 16' and 17' of said single layer of host material 12' as by thermal diffusion or ion-implementation to form a pattern of phosphor areas 16' and 1740 of selectively enhanced colors in said single layer of host material 12'.

REFERENCES:
patent: 4717606 (1988-01-01), Hale
patent: 4733128 (1988-03-01), Tohda et al.
patent: 4862033 (1989-08-01), Migita et al.

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