Electric lamp and discharge devices – With luminescent solid or liquid material – Solid-state type
Patent
1988-07-14
1990-10-16
DeMeo, Palmer C.
Electric lamp and discharge devices
With luminescent solid or liquid material
Solid-state type
313505, 313509, 313512, H05B 3304, H05B 3306, H05B 3328
Patent
active
049637886
ABSTRACT:
A TFEL device having improved contrast includes a laminate having a phosphor layer sandwiched between front and rear insulating layers placed upon a substrate supporting a set of front transparent electrodes. The rear set of electrodes are transparent or semitransparent so as not to reflect ambient light toward the viewer. The TFEL laminate is contained within a cavity created by an enclosure secured to the substrate by an adhesive. Darkly dyed filler material is injected into the cavity whose rear inside wall may have a dark coating. The semitransparent electrodes may be made of gold or may be made of transparent indium tin oxide having narrow aluminum bus bars for improved conductivity.
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Ketchpel et al., "Development of an Effective Black Layer for Electroluminescent (EL) Displays," SPIE, vol. 457, Advances in Display Technology IV, (1984).
Abe et al., "AC Thin-Film EL Display with PrMnO3 Black Dielectric Material," Society for Information Display 85 Digest, pp. 215, 217.
Schimizu et al., "High Contrast EL With New Light Absorbing Material GeNx," Japan Display '86.
Coovert Richard E.
King Christopher N.
DeMeo Palmer C.
Planar Systems Inc.
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