Some uses of microencapsulation for electric paper
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United States of America Patent
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Feb 18, 1997
Grant Date -
N/A
app pub date -
Jan 3, 1995
filing date -
Jan 3, 1995
priority date (Note) -
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Abstract
Bichromal balls have two hemispheres, typically one black and one white, each having different electrical properties. Each ball is enclosed within a spherical shell and then a space between the ball and shell is filled with a liquid to form a microsphere so that the ball is free to rotate in response to an electrical field. The microspheres can then be mixed into a substrate which can be formed into sheets or can be applied to any kind of surface. The result is a film which can form an image from an applied electrical field.
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