High brightness TFEL device and method of making same

Details High brightness TFEL device and method of making same High brightness TFEL device and method of making same

1990-02-05

1991-12-10

DeMeo, Palmer C.

Electric lamp and discharge devices

With luminescent solid or liquid material

Solid-state type

313116, 427 66, H05B 3312, H05B 3310

Patent

active

050721526

ABSTRACT:
A TFEL device for producing a high brightness output comprises a substrate supporting a laminar thin film stack including a front electrode layer and a rear electrode layer sandwiching an electroluminescent laminate comprising an electroluminescent layer sandwiched by a pair of insulating layers. A thin film insulating layer is grown by evaporation on the glass substrate and produces a surface having a degree of roughness which is replicated by the remaining thin film layers. The surface contour at the interfaces between each of the thin film layers is convoluted which reduces internal light reflection and provides more light output at the front of the panel.

REFERENCES:
patent: 4020389 (1977-04-01), Dickson et al.
patent: 4675092 (1987-06-01), Baird et al.
patent: 4728581 (1988-03-01), Kane et al.
patent: 4774435 (1988-09-01), Levinson

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