Electrophoretic display element with filler particles
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United States of America Patent
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Feb 14, 2012
Grant Date -
Sep 14, 2006
app pub date -
Mar 16, 2006
filing date -
May 3, 1999
priority date (Note) -
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status (Latency Note)
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Abstract
The invention relates to methods and materials for controlling stability and color intensity in an electrophoretic display element. Filler particles in the electrophoretic display element, serves as a medium that the electrophoretic particles must travel through during switching between optical states of the display. The filler particles provide improved control over the color intensity of the electrophoretic display element. In addition, the filler particles create resistance to the migration of the electrophoretic particles, thereby improving the bistability of the electrophoretic displays and inhibiting settling of the electrophoretic particles. Also, migration resistance provided by the filler particles can enable threshold addressing of an electrophoretic display.
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