E Ink Corporation

Jennifer M Morrison

Stephen J Telfer

Lee Yezek

Luke M Slominski

Craig A Herb

Richard J Paolini, Jr

David Darrell Miller

Kosta Ladavac

Alain Bouchard

Stephen Bull

Ana L Lattes

Christopher L Hoogeboom

Kenneth R Crounse

Michael T Regan

Jason D Feick

J Ryan Kruse

George G Harris

William T Vetterling

Jay William Anseth

Randal M Hill

Sunil Krishna Sainis

Hywel Morgan

Brandon Ian MacDonald

Isaac W Moran

Brian Steinberg

Andrew A Drabek

Olga Vladimirova Barykina-Tassa

Olga Vladimirovna Barykina-Tassa

Brandon Macdonald

Jr Richard J Paolini

Michael Thomas Regan

An electrophoretic display comprising a fluid including a first species of particles and a charge control agent disposed between first and second electrodes. When a first addressing impulse have an electrical polarity is applied to the medium, the first species of particles move in one direction relative to the electric field, but when a second addressing impulse, larger than the first addressing impulse but having the same electrical polarity, is applied to the medium, the first species of particles move in the opposed direction relative to the electric field.

Colored electrophoretic displays using same polarity reversing address pulse

An electro-optic display comprising at least two separate layers of electro-optic material, with one of these layers being capable of displaying at least one optical state which cannot be displayed by the other layer. The display is driven by a single set of electrodes between which both layers are sandwiched, the two layers being controllable at least partially independently of one another. Another form of the invention uses three different types of particles within a single electrophoretic layer, with the three types of particles being arranged to shutter independently of one another.

Method for driving two layer variable transmission display

An electrophoretic medium comprises a fluid, a first, light scattering particle (typically white) and second, third and fourth particles having three subtractive primary colors (typically magenta, cyan and yellow); at least two of these colored particles being non-light scattering. The first and second particles bear polymer coatings such that the electric field required to separate an aggregate formed by the third and the fourth particles is greater than that required to separate an aggregate formed from any other two types of particles. Methods for driving the medium to produce white, black, magenta, cyan, yellow, red, green and blue colors are also described.

Colored electrophoretic displays

Color electrophoretic displays using same polarity reversing address pulse

Polymer shells similar to those described in U.S. Pat. No. 6,822,782 can be formed on pigment particles by (a) physi-sorping a reagent comprising polymerizable groups on to the pigment particles by treating the particle with a reagent having a polymerizable or polymerization-initiating group, such that the reagent will not desorb from the particle surface when the particle is placed in a hydrocarbon medium; or (b) treating pigment particles bearing nucleophilic groups with a reagent having a polymerizable or polymerization-initiating group, and an electrophilic group, thus attaching the polymerizable or polymerization-initiating groups to the particle surface. The zeta potential of the pigment particles can be varied by a process similar to (b) but using a reagent which does not have a polymerizable or polymerization-initiating group.

Electrophoretic particles and processes for the production thereof

Multi-color electro-optic displays

An electrophoretic medium comprises a fluid and at least one species of particles disposed, When a first addressing impulse is applied to the medium, the first species of particles move in one direction relative to the electric field, but when a second addressing impulse, larger than the first addressing impulse, is applied to the medium, the first species of particles move in the opposed direction relative to the electric field.

Reverse driving pulses in electrophoretic displays

Growing community of inventors

Watertown, MA, United States of America

Jennifer M Morrison