Memory-equipped monochrome display of the photoconductor-electroluminescent type
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United States of America Patent
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Oct 8, 1991
Grant Date -
N/A
app pub date -
Feb 8, 1990
filing date -
Feb 10, 1989
priority date (Note) -
Expired
status (Latency Note)
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Abstract
A memory effect, monochromatic display of the photoconductor-electroluminescent type, includes on a substrate an electroluminescent layer and a photoconductor layer in stacked relation. The stack is interposed between two electrode systems used for exciting the electroluminescent layer, the latter having an emission spectrum overlapping the sensitivity spectrum of the photoconductor material. An optical filter is located between the electroluminescent layer and the display observer and permits the passage of that part of emission spectrum of the electroluminescent layer most useful for display purposes while blocking a region of the emission spectrum of the ambient illumination, the sensitivity spectrum of the photoconductor layer then being essentially contained in said region.
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