Xerox Corporation

Palo Alto Research Center Inc.

San-Ming Yang

Naveen Chopra

Peter Michael Kazmaier

Man-Chung Tam

Gabriel Iftime

Ahmed Alzamly

Valerie M Farrugia

Barkev Keoshkerian

Thomas Edward Enright

Jurgen Hans Daniel

Paul Farrell Smith

Raymond W Wong

Robert Anthony Street

Hadi K Mahabadi

Marko D Saban

Brent Shawhan Krusor

Ahmed Abd Alzamly

Marcel Philippe Breton

Peter Gordon Odell

Richard P N Veregin

Michael Steven Hawkins

Richard P Veregin

Aurelian Valeriu Magdalinis

Man C Tam

Patricia Ann Burns

Carol A Jennings

Mike Hawkins

Val Magdalinis

Daryl W Van Besien

Man Chung Tam

An electrophoretic display device includes a multiplicity of individual reservoirs containing a display medium between conductive substrates, at least one of which is transparent, wherein the display medium includes one or more set of colored particles in a dielectric fluid, and wherein the multiplicity of individual reservoirs are defined by a unitary grid whose walls segregate the reservoirs. The gird may be formed via photolithography or from a master stamp derived from a mold of the grid pattern.

Electrophoretic display device

The disclosure provides, in various embodiments, a method for fractionating a polyalkylene, and the fractionated polyalkylene produced thereby. The method includes, for example, separating, from a starting polyalkylene, a first portion of a polyalkylene having a Mw less than the Mw of the starting polyalkylene. Also included are carriers, phase change inks and toners comprising the fractionated polyalkylene, such as the first portion of a polyalkylene.

Polyalkylene materials

An image forming method including (a) providing a reimageable medium comprised of a substrate and a photochromic material, wherein the medium is capable of exhibiting a color contrast and an absence of the color contrast; (b) exposing the medium to an imaging light corresponding to a predetermined image to result in an exposed region and a non-exposed region, wherein the color contrast is present between the exposed region and the non-exposed region to allow a temporary image corresponding to the predetermined image to be visible for a visible time; (c) subjecting the temporary image to an indoor ambient condition for an image erasing time to change the color contrast to the absence of the color contrast to erase the temporary image without using an image erasure device; and (d) optionally repeating procedures (b) and (c) a number of times to result in the medium undergoing a number of additional cycles of temporary image formation and temporary image erasure, wherein the reimageable medium is prepared by a solvent-less process comprising i) heating and melting a photochromic material and a polymer to form a coating composition, and ii) coating the coating composition onto at least one side of a transient document substrate.

Solvent-less process for producing transient documents

A method of displaying an image in an electrophoretic display device having at least one display layer including a multiplicity of individual reservoirs containing a display fluid between conductive substrates, wherein the display fluid comprises at least two sets of particles in a liquid medium, the at two sets of particles each exhibiting a different color, wherein a first set of particles and a second set of particles have a same charge polarity and the first set of particles has a higher average charge than the second set of particles, includes applying an electric field to selected ones of the multiplicity of reservoirs to effect movement of one or more of the differently colored sets of particles in the display fluid therein to display a desired color derived from among the sets of differently colored particles, wherein the applying to display a color of the second set of particles involves pulsing an electric field through the conductive substrates for a time sufficient to attract the first set of particles away from a front viewing conductive substrate and past the second set of particles.

Electrophoretic display and method of displaying images

Exemplary electrophoretic ink capsules for electrophoretic displays, and methods for making the exemplary electrophoretic ink capsules are disclosed. In various embodiments, the electrophoretic ink capsules can include triboelectrically charged electrophoretic particles having higher electrical conductivity than conventionally charged electrophoretic particles allowing fabrication of electrophoretic displays with lower switching fields and faster response times.

Two-particle electrophoretic ink for microencapsulated flexible electronic display

Disclosed is a technique for producing bichromal balls that are adapted for use in high temperature applications. The bichromal balls find particular application in signs and display devices that can be used in environments in which the temperature exceeds 40&#xb0; C.

Bichromal balls

An electrophoretic display medium includes at least one set of colored particles in a dielectric fluid, wherein the dielectric fluid is a silicone fluid, and wherein the display medium has an electrical conductivity of about 10to about 10S/m. The display medium is included in an electrophoretic display device by including the medium in a multiplicity of individual reservoirs of a display layer or layers that is located between conductive substrates.

Electrophoretic display medium and device

A solvent-less process for producing a transient document which is capable of self-erasing, wherein the solvent-less process includes a) heating and reacting a photochromic compound and a polymer to form a coating composition, and b) coating the coating composition onto an image-receiving side of a transient document substrate, and further an image forming method using the same solvent-less process and including (i) providing a reimageable medium of a substrate and a photochromic material, wherein the medium is capable of exhibiting a color contrast and an absence of the color contrast; (ii) exposing the medium to an imaging light corresponding to a predetermined image to result in an exposed region and a non-exposed region, wherein the color contrast is present between the exposed region and the non-exposed region to allow a temporary image corresponding to the predetermined image to be visible for a visible time; (iii) subjecting the temporary image to an indoor ambient condition for an image erasing time to change the color contrast to the absence of the color contrast to erase the temporary image without using an image erasure device; and (iv) optionally repeating procedures (ii) and (ii) a number of times to result in the medium undergoing a number of additional cycles of temporary image formation and temporary image erasure.

An electrophoretic display medium includes one or more set of colored particles in a dielectric fluid, wherein the display medium has an electrical conductivity of about 10to about 10S/m, and wherein at least one of the one or more set of particles include crosslinked emulsion aggregation polymer particles. The display medium is included in an electrophoretic display device by including the medium in a multiplicity of individual reservoirs of a display layer or layers that is located between conductive substrates.

An electrophoretic display includes one or more set of colored particles in a dielectric fluid, wherein at least one of the one or more set of particles comprise particles having a cationic coating thereon imparting a substantially uniform positive charge to the particles. The display medium is included in an electrophoretic display device by including the medium in a multiplicity of individual reservoirs of a display layer or layers that is located between conductive substrates.

An electrophoretic display medium includes one or more set of colored particles in a dielectric fluid, and wherein at least one of the one or more set of particles are particles having thereon at least one polyelectrolyte coating. The display medium is included in an electrophoretic display device by including the medium in a multiplicity of individual reservoirs of a display layer or layers that is located between conductive substrates.

An electrophoretic display medium includes one or more set of colored particles in a dielectric fluid, wherein at least one of the one or more set of particles are particles having acid functionality imparting a substantially uniform negative charge to the particles. The display medium is included in an electrophoretic display device by including the medium in a multiplicity of individual reservoirs of a display layer or layers that is located between conductive substrates.

Compositions of encapsulated triboelectrically charged particles and methods for making them using a spinning disc process are disclosed. The methods can be used to make charged pigment particles embedded in a neutral polymer matrix. The polymer matrix keeps oppositely charged pigment particle from agglomerating. The particles can be used for electrophoretic displays.

Particles for electrophoretic media

An electrophoretic display device includes a multiplicity of individual reservoirs containing a display medium between conductive substrates, at least one of which is transparent, wherein the display medium includes one or more set of colored particles in a dielectric fluid and has an electrical conductivity of about 10to about 10S/m, and wherein the multiplicity of individual reservoirs are defined by a unitary grid whose walls segregate the reservoirs. The grid may be formed via photolithography or from a master stamp derived from a mold of the grid pattern.

An electrophoretic display device includes a multiplicity of individual reservoirs containing a display medium between conductive substrates, at least one of which is transparent, wherein the display medium includes one or more set of colored particles in a dielectric fluid, and wherein the multiplicity of individual reservoirs are mesh openings in a fabric mesh whose fibers or filaments segregate the reservoirs.

Growing community of inventors

Mississauga, Canada

San-Ming Yang