Light emission enhancing dielectric layer for EL panel
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United States of America Patent
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-
Sep 23, 1986
Grant Date -
N/A
app pub date -
Aug 6, 1984
filing date -
Aug 6, 1984
priority date (Note) -
Expired
status (Latency Note)
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Abstract
A thin-film electroluminescent panel which has a light sink layer deposited immediately behind the phosphor layer thereof is modified to have a light emission enhancing dielectric layer deposited between the phosphor layer and the light sink layer. The light emission enhancing dielectricphosphor interface provides for injecting hot electrons for impact-exciting the luminescent centers in the phosphor to enable the panel to generate light when the front electrode of the panel is positive in potential. Moreover, the light emission enhancing dielectric layer is formed of a material having the same index of refraction as the phosphor layer so that it will pass the incident ambient light and the rearwardly directed light generated in the phosphor layer without reflection into the light sink layer wherein it is trapped by internal reflection and absorbed.
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