Patent · US Active

Electrophoretic media and processes for the production thereof

US7532388B2 · kind B2 · utility

107Cited by

362References

20Claims

0Family size

Assignee

E Ink Holdings Inc. · TW

Inventors

Thomas H. Whitesides · Somerville, US
Qingye Zhou · Acton, US
Robert W. Zehner · Cambridge, US
Karl R. Amundson · Cambridge, US
Suzanne Balko · Davis, US
Alberto Goenaga · Lompoc, US
Peter J. Valianatos · Boston, US
Charles Howie Honeyman · Brookline, US
Elizabeth M. Gates · Somerville, US
Matthew A. King · Wellesley, US
Russell J. Wilcox · Natick, US

Key dates

Filing date	May 2, 2007
Grant date	May 12, 2009
Priority date	—
Expiry date	May 2, 2027

Classification

Technology area (CPC Y)Emerging Cross-Sectional Technologies
CPC primaryY10T428/2991
WIPO fieldMeasurement
WIPO sectorInstruments

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.

Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.