Thin film electrolumenescent display panel

Details Thin film electrolumenescent display panel Thin film electrolumenescent display panel

1985-10-23

1987-06-02

Moore, David K.

Electric lamp and discharge devices

With luminescent solid or liquid material

Solid-state type

313509, H05B 3322, H05B 3326

Patent

active

046706909

ABSTRACT:
An electroluminescent (EL) material is sandwiched between parallel strips of electrodes running at right angles to each other. Pixels are formed where the electrodes cross to provide a thin film, EL display. The display includes a layer of insulating material which has a hole at each pixel. The backside electrodes extend into the holes, thus providing a high electric field only at the pixel locations. These backside electrodes are broad to assure electrical continuity despite any open-circuit created by burned-out pixels. The insulating material overlaps the edges of the frontside electrodes, thus reducing the electric field which concentrates at the electrode edge. The insulating layer and the backside electrode can be made black, or a light-absorbing, semi-insulating layer used in order to reduce light scattering and reflection. Transparent electrodes can be used to allow light to emit from either the front, the back, or both sides of the display.

REFERENCES:
patent: 3184635 (1965-05-01), O'Connell, Jr.
patent: 4279690 (1981-07-01), Dierschke
patent: 4342945 (1982-08-01), Ketchpel

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