Black electrophoretic particles and method of manufacture
AssigneeCopytele, Inc.
InventorWei-Hsin Hou
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Abstract
The present invention are dielectric black particles for use in electrophoretic images displays, electrostatic toner or the like, and the corresponding method of manufacturing the same. The present invention black particles are latex particles formed by a polymerization technique, wherein the latex particles are stained to a high degree of blackness with a metal oxide.
Claims11
An electrophoretic display having an electrophoretic dispersion positioned between an anode and a cathode, wherein said electrophoretic dispersion includes black dielectric electrophoretic particles suspended in a clear medium of a predetermined density, said electrophoretic particles being formed from a composite latex polymer having a core structure and at least one shell layer, said core structure having residual double bonds which have reacted with a metal oxide to produce said black color, said particles having a density substantially equal to said predetermined density of said liquid medium.
Dependencies are inferred from the claim text.