Electrophoretic media and processes for the production thereof
AssigneeE Ink Corporation
InventorsThomas H. Whitesides, Qingye Zhou, Russell J. Wilcox
Life of this patent
Estimating the term…
Abstract
A first electrophoretic medium comprises an electrically charged particle suspended in a suspending fluid, the particle having a polymeric shell having repeating units derived from at least one monomer the homopolymer of which is incompatible with the suspending fluid. A second, similar electrophoretic medium comprises a suspending fluid, and first and second types of electrically charged particle suspended in the suspending fluid, the two types of particle having differing optical characteristics but both having polymeric shells. The polymeric shells are arranged such that homoaggregation of the two types of particles is thermodynamically favored over heteroaggregation.
Claims20
An electrophoretic medium comprising an electrically charged particle disposed in a fluid, the particle having a polymeric shell having repeating units derived from at least one monomer the homopolymer of which is incompatible with the fluid.
An electrophoretic particle comprising a pigment particle having a polymeric shell having repeating units derived from at least one monomer the homopolymer of which is incompatible with n-hexane.
An electrophoretic particle comprising a pigment particle having a polymeric shell having repeating units derived from at least one monomer the homopolymer of which is incompatible with perfluorodecalin.
An electrophoretic particle comprising a pigment particle having a polymeric shell having repeating units derived from at least one monomer the homopolymer of which is incompatible with polydimethylsiloxane 200, viscosity 0.65 centistokes.
Dependencies are inferred from the claim text.