E Ink Corporation

Peter J Valianatos

Karl Raymond Amundson

Michael L Steiner

Paul Stephen Drzaic

Jonathan D Albert

Thomas Henry Whitesides

Andrew L Loxley

Barrett O Comiskey

Glen Crossley

Katharine Geramita

Robert Waverly Zehner

Guy Danner

Ian D Morrison

Charles Howie Honeyman

Craig A Herb

Russell J Wilcox

Alberto Goenaga

Michael D Walls

Matthew A King

Rajesh Chebiyam

Qingye Zhou

Elizabeth Moran Gates

Jeremy J Manning

Suzanne Balko

Rachael A Forgit

Prior art processes for producing protein-based capsules (for example, capsules for use in electrophoretic media) tend to be wasteful because they produce many capsules outside the desired size range, which is typically about 20 to 50 &#x3bc;m. Capsule size distribution and yields can be improved by either (a) emulsifying a water-immiscible phase in a preformed coacervate of the protein; or (b) using a limited coalescence process with colloidal alumina as the surface-active particulate material.

Preparation of capsules

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.

Electrophoretic media and processes for the production thereof

An encapsulated electrophoretic display having a plurality of non-spherical capsules disposed substantially in a single layer on a substrate.

Encapsulated electrophoretic displays having a monolayer of capsules and materials and methods for making the same

The invention features a photoconductively addressed display and a method of photoconductive addressing in a display. The method includes providing an electro-optic imaging layer that extends in an X direction and a Y direction and comprises an array of image elements. A column electrode layer is provided adjacent to one side of the electro-optic imaging layer. The column electrode layer includes a plurality of column electrodes that each extend in the Y direction and are spaced from one another in the X direction. A photoconductive layer disposed between the electro-optic imaging layer and the column electrode layer is provided. An elongate portion of the photoconductive layer is illuminated in the X direction while scanning the illumination in the Y direction to translate a location of the illuminated elongate portion. At least one image element of the array of image elements is addressed by applying an intermittent voltage to one of the plurality of column electrodes that is adjacent to the at least one image element while the illuminated elongate portion of the photoconductive layer is adjacent to the at least one image element.

Electro-optic displays and optical systems for addressing such displays

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Boston, MA, United States of America

Peter J Valianatos