Methods for driving color electrophoretic displays
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United States of America Patent
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May 19, 2020
Grant Date -
Oct 5, 2017
app pub date -
May 23, 2017
filing date -
Sep 10, 2014
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Abstract
An electrophoretic medium includes a fluid, a first, light scattering particle (typically white) and second, third and fourth particles having three subtractive primary colors (typically magenta, cyan and yellow); at least two of these colored particles being non-light scattering. The first and second particles bear polymer coatings such that the electric field required to separate an aggregate formed by the third and the fourth particles is greater than that required to separate an aggregate formed from any other two types of particles. Methods for driving the medium to produce white, black, magenta, cyan, yellow, red, green and blue colors are also described.
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