Nonemissive displays and piezoelectric power supplies therefor
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United States of America Patent
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Jul 27, 1999
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N/A
app pub date -
Oct 25, 1996
filing date -
Oct 25, 1996
priority date (Note) -
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Abstract
An electrophoretic display has a substantially two-dimensional arrangement of microcapsules each having therein an electrophoretic composition of a dielectric fluid and a suspension of particles that visually contrast with the dielectric liquid and also exhibit surface charges; a pair of electrodes, at least one of which is visually transparent, disposed on and covering opposite sides of the microcapsule arrangement; and means for creating a potential difference between the two electrodes, the potential difference causing the particles to migrate toward one of the electrodes. The display may be powered by one or more piezoelectric elements, which are also suitable for powering other types of nonemissive displays.
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