Electrophoretic displays and systems for addressing such displays
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United States of America Patent
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Sep 3, 2002
Grant Date -
N/A
app pub date -
Mar 18, 1999
filing date -
Mar 18, 1998
priority date (Note) -
Expired
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Abstract
Electrophoretic displays include a light-emitting layer, a photoconductive layer, and an electrophoretic layer. The light-emitting layer may be an organic, light-emitting material, or organic, light-emitting diode, which is addressable using a multiplex addressing drive scheme. The impedance of the photoconductive layer is lowered when struck by light from the light-emitting layer. As a result of the lowered impedance of the photoconductive layer, the electrophoretic layer, which itself cannot be multiplexed, is addressed at a lower, subthreshold voltage.
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