E Ink Corporation

The Penn State Research Foundation

Jason D Feick

Kosta Ladavac

Ziyan Wu

Stephen J Telfer

Richard J Paolini, Jr

Kenneth R Crounse

Michael T Regan

David Darrell Miller

Craig A Herb

Alain Bouchard

Lee Yezek

Ana L Lattes

Stephen Bull

Luke M Slominski

Christopher L Hoogeboom

Jennifer M Morrison

J Ryan Kruse

Michael D Walls

Thomas Henry Whitesides

Hui Du

Olga Vladimirovna Barykina-Tassa

John Lock

Erik Dunkerley

James H Aborn

Allison Mary Yake

Michael Musick

Darrell Velegol

Charles E Snyder

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

Improved formulations of electrophoretic media that can be incorporated into displays, front plane laminates, inverted front plane laminates, or color changing films. The formulations include a non-polar fluid, a plurality of first charged particles, and charge control agents (CCA) including a quaternary amine and an unsaturated polymeric tail comprising monomers of at least 10 carbon atoms in length. The formulations show improved switching speeds, as well as a larger dynamic range at low temperatures (i.e., below about 0° C.), where compared to state-of-the-art electrophoretic media.

Electrophoretic media including charge control agents comprising quartenary amines and unsaturated polymeric tails

Color electrophoretic displays using same polarity reversing address pulse

Improved formulations of electrophoretic media that can be incorporated into displays, front plane laminates, inverted front plane laminates, or color changing films. The formulations include a non-polar fluid, a plurality of first charged particles, and charge control agents (CCA) including a quaternary amine and an unsaturated polymeric tail comprising monomers of at least 10 carbon atoms in length. The formulations show improved switching speeds, as well as a larger dynamic range at low temperatures (i.e., below about 0&#xb0; C.), where compared to state-of-the-art electrophoretic media.

Quinacridone pigments that are surface-functionalized with glycidyl methacrylate, maleic anhydride, or 4-methacryloxyethyl trimellitic anhydride to create a functionalized pigment. The functional groups are then activated to bond hydrophobic polymers, thereby coating the pigment with the hydrophobic polymers. The quinacridone pigments can be used for a variety of applications. They are well-suited for use in electro-optic materials, such as electrophoretic media for use in electrophoretic displays.

Method of making functionalized quinacridone pigments

Functionalized quinacridone pigments

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

In electrophoretic media, it is advantageous to use pigment particles having a polymer chemically bonded to, or cross-linked around, the pigment particles, the polymer comprising repeating units derived from a fluorinated acrylate or fluorinated methacrylate monomer. The polymer desirably has a branched chain structure with side chains extending from a main chain. Desirably, the fluorinated acrylate or fluorinated methacrylate monomer comprises from 1 to 5 mole percent of the polymer.

Electrophoretic particles and processes for the production thereof

An electrophoretic medium comprises two different types of electrically charged particles in a fluid. One type of electrically charged particles comprises a dark colored particle and a second type of electrically-charged particles comprises titania having a zirconia surface treatment.

Particles for use in electrophoretic displays

An electrophoretic medium comprises at least one electrically charged particle dispersed posed in a fluid. The electrically charged particle comprises an inorganic black pigment having a surface area of at least about 7 m/g. Preferred pigments are magnetite and mixed metal oxides containing two or more of iron, chromium, nickel, manganese, copper and cobalt, for example copper iron manganese oxide spinel and copper chromium manganese oxide spinel. The inorganic black pigment may bear a polymer coating.

Electrophoretic particles, and processes for the production thereof

Growing community of inventors

Auburndale, MA, United States of America

Jason D Feick