Formulations for improved electrophoretic display suspensions and related methods
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United States of America Patent
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Apr 4, 1995
Grant Date -
N/A
app pub date -
Dec 2, 1993
filing date -
Dec 2, 1993
priority date (Note) -
Expired
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Abstract
The invention provides an electrophoretic suspension comprising a suspension medium including tetrachloroethylene, 5-ethylidene-2-norbornene and an aromatic solvent including either a mixture of phenyl xylyl ethanes or a mixture of mono and di-benzyl toluene. The suspension further comprises a plurality of pigment particles dispersed in the suspension medium; a fluid dye dissolved in the suspension medium for providing a contrast with the pigment particles; and a charge control agent adsorbed on the pigment particles for preventing the pigment particles from agglomerating.
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