公开(公告)号：CA2631600A1

公开(公告)日：2008-11-25

申请号：CA2631600

申请日：2008-05-20

Applicant: XEROX CORP

Inventor： CHOPRA NAVEEN ,  LIN PINYEN ,  KAZMAIER PETER M ,  PAN DAVID H

IPC: G02F1/167 ,  G09F9/37

Abstract: Methods form a multi-color electrophoretic display. The methods include providing microcapsules, wherein the microcapsules have an electrostatic charge, and wherein the microcapsules comprise, a shell that is transparent and a displa y medium within the shell, wherein the display medium is comprised of either (a) at least two sets of differently colored particles in a substantially clear fluid, or (b) at least one set of colored particles in a differently colored fluid. The methods include transferring the microcapsules to a substrate, wherein the electrostatic charge of the microcapsules attracts the microcapsules to the substrate, wherein a display layer of microcapsules is formed on the substrate. The methods include positioning a conductive substrate adjacent to the substrate, wherein the substrate is located between the display layer and the conductive substrate. In use, the conductive substrate applies an electric field to the display layer, and wherein the sets of particles within each microcapsule in the display layer are movable within the microcapsule by the electric field.

公开(公告)号：CA2631569A1

公开(公告)日：2008-11-25

申请号：CA2631569

申请日：2008-05-20

Applicant: XEROX CORP

Inventor： KAZMAIER PETER M ,  PAN DAVID H ,  CHOPRA NAVEEN ,  LIN PINYEN

IPC: G02F1/167 ,  C09D5/44 ,  C09D11/00

Abstract: An electrophoretic ink includes fluid having either (a) at least two sets of differently colored particles with the fluid been a substantially clear flui d, or (b) at least one set of colored particles with the fluid been a differently colored fluid than the colored particles, wherein at least one set of colored particles includes at least one electrophoretic particle having a core-shell structure. The at least one electrophoretic particle includes a shell and a core located within the shell, wherein the- core includes a colorant and a fluorescent compound. An electric field may be applied adjacently to the fluid of the ink, and the at least one set of colored particles having t he core-shell structure is movable within the fluid of the ink by the electric field.

公开(公告)号：CA2588499A1

公开(公告)日：2007-11-19

申请号：CA2588499

申请日：2007-05-14

Applicant: XEROX CORP

Inventor： KRUSOR BRENT S ,  KAZMAIER PETER M ,  YANG SAN-MING ,  IFTIME GABRIEL ,  CHOPRA NAVEEN ,  DANIEL JURGEN H

IPC: G02F1/167 ,  G09F9/37

Abstract: An electrophoretic display device includes a multiplicity of individual reservoirs containing a display medium between conductive substrates, at lea st 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 10 -11 to about -15 S/m, and wherein the multiplicity of individual reservoirs are defined b y a unitary grid whose walls segregate the reservoirs. The gird may be formed vi a photolithography or from a master stamp derived from a mold of the grid pattern.

公开(公告)号：CA2588354A1

公开(公告)日：2007-11-19

申请号：CA2588354

申请日：2007-05-11

Applicant: XEROX CORP

Inventor： YANG SAN-MING ,  TAM MAN CHUNG ,  CHOPRA NAVEEN ,  KEOSHKERIAN BARKEV ,  STREET ROBERT A ,  DANIEL JURGEN H ,  SMITH PAUL F ,  KAZMAIER PETER M ,  MAHABADI HADI K

IPC: G02F1/167 ,  G09F9/37

Abstract: A method of displaying an image in an electrophoretic display device include s charging each of the sets of differently colored particles to have a differe nt charge through application of an electric field to the display fluid or the device, and then applying an electric field to selected ones of the multiplicity of reservoir s 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. The colors are shown by way of the particle set or sets moved to be closest to the viewing side conductive substrate of the device. The device m ay include at least one display layer, including a multiplicity of individual reservoirs containing a display fluid, between conductive substrates, at least one of which is transparent and thus may be a viewing side substrate, wherein the display fluid includes at least two sets of particles in a liquid medium, the at least two sets of particles exhibiting a different color.

公开(公告)号：CA2588316A1

公开(公告)日：2007-11-19

申请号：CA2588316

申请日：2007-05-11

Applicant: XEROX CORP

Inventor： CHOPRA NAVEEN ,  ALZAMLY AHMED ,  KAZMAIER PETER M ,  TAM MAN-CHUNG ,  YANG SAN-MING

IPC: G02F1/167 ,  G09F9/37

Abstract: An electrophoretic display device includes a display layer comprised of a binder having a multiplicity of individual cavities therein that contain a display medium, and conductive substrates, at least one of the conductive substrates being transparent, wherein the display layer is located in between the conductive substrates, and wherein the display medium comprises one or more set of colored particle s in a dielectric fluid and has an electrical conductivity of about 10 -11 to about 10 -15 S/m. The display device may be made by forming composite particles comprised of a sacrificial binder and the one or more set of particles of the display mediu m; mixing the composite particles with the binder to form a mixture; forming a layer from the mixture; removing the sacrificial binder from the composite particles in the layer to form cavities in the layer that contain the one or more set of colored particles; and filling the cavities with the dielectric fluid.

公开(公告)号：CA2540911A1

公开(公告)日：2006-09-30

申请号：CA2540911

申请日：2006-03-23

Applicant: XEROX CORP

Inventor： IFTIME GABRIEL ,  KAZMAIER PETER M

IPC: G02F1/13 ,  G02F1/133 ,  G02F1/135

Abstract: A reimagable medium may include one or more photochromic layers, a liqu id crystal layer adjacent to at least one photochromic layer, and an electric field generating apparatus connected to supply a voltage across the liquid crystal layer.

公开(公告)号：CA2527997A1

公开(公告)日：2006-06-03

申请号：CA2527997

申请日：2005-11-25

Applicant: XEROX CORP

Inventor： IFTIME GABRIEL ,  KAZMAIER PETER M

IPC: C09K19/04 ,  C09K19/58 ,  G02F1/13 ,  G02F1/133 ,  G09F9/35

Abstract: A cholesteric display including a liquid crystalline mixture having a dipol ar dopant dissolved in the liquid crystalline mixture and the resulting mixture is reflecting light in the visible range of the spectrum when in planar state. In accordance with another aspect, a process includes forming a composition wit h a dipolar molecule to result in a liquid crystal dipolar dopant, and liquid crystal is added to the composition. In accordance with still another aspect, a device includes a liquid crystal composition includes a cholesteric liquid and a dipolar dopant. The liquid crystal composition is switchable between a focal-conic state and a planar state in the presence of an electric field and is stable in the respective state when the electric field is removed.

公开(公告)号：CA2515634A1

公开(公告)日：2006-02-17

申请号：CA2515634

申请日：2005-08-10

Applicant: XEROX CORP

Inventor： JENNINGS CAROL A ,  ENRIGHT THOMAS E ,  KAZMAIER PETER M ,  TAM MAN C ,  HAWKINS MICHAEL S ,  YANG SAN MING ,  SABAN MARKO D ,  MAGDALINIS VAL ,  ALZAMLY AHMED

IPC: G09F19/00 ,  B41M5/00 ,  C08J5/00 ,  G09F7/00

Abstract: Disclosed is a technique for producing bichromal balls that are adapted f or 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.degree.C.

公开(公告)号：CA2504995A1

公开(公告)日：2005-10-29

申请号：CA2504995

申请日：2005-04-22

Applicant: XEROX CORP

Inventor： KAZMAIER PETER M ,  IFTIME GABRIEL

IPC: G03C1/685 ,  G03C1/73 ,  G03C5/56 ,  B41J2/435 ,  G03G5/00 ,  C09K9/00 ,  B41M5/00 ,  G03C1/775

Abstract: An image forming method composed of: (a) providing a reimageable medium composed 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.

公开(公告)号：DE69128497D1

公开(公告)日：1998-02-05

申请号：DE69128497

申请日：1991-06-03

Applicant: XEROX CORP

Inventor： DUFF JAMES M ,  MAYO JAMES D ,  HSIAO CHENG-KUO ,  HOR AH-MEE ,  BLUHM TERRY L ,  HAMER GORDON K ,  KAZMAIER PETER M

IPC: C09B47/073 ,  C09B67/12 ,  C09B67/50 ,  G11B7/248 ,  C09B47/08 ,  G03G5/047 ,  G03G5/06

Abstract: A process for the preparation of titanyl phthalocyanine which comprises dissolving a titanyl phthalocyanine in a solution of trifluoroacetic acid and methylene chloride; adding the resultant solution to a solvent system that will enable precipitation; and separating the desired titanyl phthalocyanine from the solution followed by an optional washing.