Electrophoretic Imaging, Process, Composition, Or Product Patents (Class 430/32)
  • Patent number: 9030729
    Abstract: Particles for display include a copolymer that contains at least, as copolymer constituents, a reactive compound containing a silicone chain or an alkyl chain and a vinyl compound represented by Formula (1), wherein a content of the reactive compound containing a silicone chain or an alkyl chain is 3.0% by weight or less with respect to the weight of the particles: ArH2C?CH2)n??Formula (1) wherein in Formula (1), Ar represents an unsubstituted aromatic ring or an aromatic ring that is substituted with an alkyl group having 1 to 6 carbon atoms, or an aryl group having 6 to 12 carbon atoms, and n represents an integer from 1 to 4.
    Type: Grant
    Filed: September 3, 2013
    Date of Patent: May 12, 2015
    Assignee: Fuji Xerox Co., Ltd.
    Inventors: Hiroshi Kayashima, Jun Kawahara
  • Patent number: 9025237
    Abstract: An electrophoresis particle of the embodiment includes a mother particle and a covering layer which covers at least a part of the mother particle, wherein the covering layer includes a shell which is consisted of an organic polymer and which cellulary engulfs the mother particle and a polymer which is bonded on the surface of the shell and the polymer is one that a monomer has been polymerized using living radical polymerization, setting the polymerization initiating group as the starting point.
    Type: Grant
    Filed: March 21, 2013
    Date of Patent: May 5, 2015
    Assignee: Seiko Epson Corporation
    Inventors: Shinobu Yokokawa, Harunobu Komatsu
  • Publication number: 20150109659
    Abstract: The present invention relates to an electrophoretic particle that includes: a core part including an inorganic particle; a shell layer formed on the core part; and a protective layer formed on the shell layer, a method of producing the electrophoretic particle, and an electrophoretic display device including the electrophoretic particle.
    Type: Application
    Filed: March 30, 2012
    Publication date: April 23, 2015
    Applicant: KOLON INDUSTRIES, INC.
    Inventors: Hyeon-Jung Yoo, Young-Seo Yoon, Hey-Jin Myoung
  • Patent number: 8968974
    Abstract: Techniques for coating print media are described herein. In an example, a photo imaging assembly is to receive a liquid electrophoretic coating composition assembly on a chargeable surface so as to form a coating layer thereon using electrostatic forces. The coating layer is to be transferred to a print medium.
    Type: Grant
    Filed: September 25, 2012
    Date of Patent: March 3, 2015
    Assignee: Hewlett-Packard Development Company, L.P.
    Inventors: Omer Gila, Napoleon J. Leoni
  • Patent number: 8964275
    Abstract: A display apparatus may include a first substrate having one or more unit pixel regions defined and including a driving thin film transistor, a second substrate disposed on the first substrate and facing the first substrate, and a color absorbing layer disposed on the first substrate.
    Type: Grant
    Filed: November 1, 2011
    Date of Patent: February 24, 2015
    Assignee: Samsung Display Co., Ltd.
    Inventors: Min-Woo Kim, Soo-Min Baek, Il-Nam Kim, Jae-Kyoung Kim, Won-Sang Park
  • Publication number: 20140376080
    Abstract: Electrophoretic particle include a core particle (mother particle); a siloxane-based compound that is bonded to a surface of the core particle and contains a connection structure in which a plurality of siloxane bonds are serially connected to each other; and a charging group that is an organic group bonded to the surface of the core particle, contains a main skeleton, and has a positive or negative electric charge. It is preferable that the occupancy rate of an area to which the siloxane-based compound is bonded on the surface of the core particle be in the range of 0.05% to 20%.
    Type: Application
    Filed: June 9, 2014
    Publication date: December 25, 2014
    Inventors: Shinobu YOKOKAWA, Masahiko NAKAZAWA
  • Publication number: 20140376081
    Abstract: Electrophoretic particle include a core particle; a siloxane-based compound that is bonded to a surface of the core particle and contains a connection structure in which a plurality of siloxane bonds are serially connected to each other; and a polarizing group that is an organic group bonded to the surface of the core particle, contains a main skeleton and a substituent bonded to the main skeleton, and has unevenly distributed electrons on the particle side of the main skeleton or the opposing side thereof.
    Type: Application
    Filed: June 9, 2014
    Publication date: December 25, 2014
    Inventors: Shinobu YOKOKAWA, Masahiko NAKAZAWA
  • Patent number: 8906998
    Abstract: This invention relates to white reflective polymer particles prepared by a reverse emulsion solvent removal process, electrophoretic fluids comprising such particles, and electrophoretic display devices comprising such fluids.
    Type: Grant
    Filed: May 30, 2011
    Date of Patent: December 9, 2014
    Assignee: Merck Patent GmbH
    Inventors: Louise Diane Farrand, Mark John Goulding, Roger Kemp, Jonathan Henry Wilson
  • Publication number: 20140355104
    Abstract: There is provided electrophoretic particle which has core particle, and a siloxane-based compound which includes a connecting structure in which a plurality of siloxane bonds are connected in series, and the surface of the core particle includes a first region to which the siloxane-based compound is bonded, and a second region in which charging characteristic derived from the core particle is expressed by exposure of the surface of the core particle. An occupancy rate of the first region on the surface of the core particle is preferably equal to greater than 0.05% and equal to or less than 20%.
    Type: Application
    Filed: May 27, 2014
    Publication date: December 4, 2014
    Applicant: SEIKO EPSON CORPORATION
    Inventors: Masahiko NAKAZAWA, Shinobu YOKOKAWA
  • Patent number: 8902491
    Abstract: The present invention is directed to an electrophoretic fluid comprising uncharged or lightly charged neutral buoyancy particles. The resulting fluid can improve not only image stability but also contrast ratio of a display device, without significantly affecting the switching speed. The present invention is also directed to an electrophoretic display comprising display cells filled with the electrophoretic fluid.
    Type: Grant
    Filed: September 23, 2011
    Date of Patent: December 2, 2014
    Assignee: E Ink California, LLC
    Inventors: Ming Wang, Yu Li, Hui Du, Xiaojia Wang, Haiyan Gu, Roman Ivanov, Robert Sprague
  • Publication number: 20140240814
    Abstract: An electrophoretic particle includes a polymer having at least a reactive compound represented by the following Formula (I) as a polymerizable component, at least on a surface: wherein in Formula (I), Ra represents a hydrogen atom or a methyl group, X represents a substituted or unsubstituted divalent hydrocarbon group, Y represents a substituted or unsubstituted divalent hydrocarbon group, and Z represents a hydrogen atom, or a substituted or unsubstituted monovalent hydrocarbon group.
    Type: Application
    Filed: August 22, 2013
    Publication date: August 28, 2014
    Applicant: FUJI XEROX CO., LTD.
    Inventor: Yasuo YAMAMOTO
  • Patent number: 8817361
    Abstract: An electrophoretic particle includes a core particle and a coating layer covering at least one portion of the core particle. The coating layer contains a polymer and a silane coupling agent containing a nonionic charged group attached to the surface of the core particle. The polymer contains a silane coupling agent containing a polymerizable group attached to the surface of the core particle and a polymerization site formed by polymerizing a monomer using the polymerizable group as a starting point.
    Type: Grant
    Filed: January 23, 2013
    Date of Patent: August 26, 2014
    Assignee: Seiko Epson Corporation
    Inventor: Hitoshi Yamamoto
  • Publication number: 20140227722
    Abstract: Nanosubstrates as biosensors, methods of making such nanosubstrates, and methods of using such nanosubstrates to detect biomarkers are described.
    Type: Application
    Filed: March 7, 2014
    Publication date: August 14, 2014
    Applicant: Northeastern University
    Inventors: Asanterabi Malima, Ahmed Busnaina, Salome Siavoshi, Sivasubramanian Somu, Cihan Yilmaz, Tiziana Musacchio, Jaydev Upponi, Vladimir Torchilin
  • Publication number: 20140211296
    Abstract: 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.
    Type: Application
    Filed: November 11, 2013
    Publication date: July 31, 2014
    Applicant: E INK CORPORATION
    Inventors: Michael D. Walls, Jason D. Feick, Thomas H. Whitesides
  • Publication number: 20140153080
    Abstract: This invention generally relates to the use of dipole charged balls having differently coloured hemispheres (bichromal balls) in twisting ball displays comprising a pair of planar addressing electrodes and the space between these electrodes that is filled with a thixotropic liquid into which has been dispersed a plurality of electrically charged and optically anisotropic rotatable elements.
    Type: Application
    Filed: June 6, 2010
    Publication date: June 5, 2014
    Applicant: VISITRET DISPLAYS OÜ
    Inventors: Madis-Marius Vahtre, Nicholas K. Sheridon, Juri LIIV
  • Publication number: 20140147777
    Abstract: The present invention provides uniformly electrified electret fine particles having excellent electrophoretic properties. Specifically, the present invention provides a core-shell electret fine particle comprising a core part and a shell part, the core part containing a material that has an ability to disperse a pigment therein, the shell part containing an electret resin, and the electret resin being a fluorine-containing resin and being electretized by electron ray irradiation, radial ray irradiation, or corona discharge treatment.
    Type: Application
    Filed: May 2, 2012
    Publication date: May 29, 2014
    Applicant: SAKURA COLOR PRODUCTS CORPORATION
    Inventors: Hiroshi Inoue, Tomochika Yoshitsugi, Ryuichi Kiyoe
  • Patent number: 8711469
    Abstract: An electrophoretic element includes: an electrophoretic particle; a porous layer formed of a fibrous structure containing a non-migrating particle having optical reflective characteristics different from those of the electrophoretic particle and having a plurality of pores; and a partition that is partially adjacent to the porous layer and defines a space for accommodating the electrophoretic particle. An area rate of the pores per unit area of the porous layer is small in an adjacent region where the partition is adjacent to the porous layer compared with in a non-adjacent region where the partition is not adjacent to the porous layer.
    Type: Grant
    Filed: May 22, 2013
    Date of Patent: April 29, 2014
    Assignee: Sony Corporation
    Inventors: Atsuhito Yasui, Hidehiko Takanashi, Ken Kobayashi, Ryo Kasegawa, Aya Shuto
  • Patent number: 8705164
    Abstract: Disclosed herein is a display apparatus including first and second substrates, at least one of which has a light transmitting characteristic, as well as first and second electrodes provided on the two mutually facing surfaces of the first and second substrates respectively; and an electrophoretic device provided between the first and second substrates, wherein the first substrate and the first electrode each have an external edge folded back so as to cover at least a portion of a terminal surface of the second substrate.
    Type: Grant
    Filed: March 14, 2012
    Date of Patent: April 22, 2014
    Assignee: Sony Corporation
    Inventors: Hironobu Abe, Nobuhide Yoneya
  • Patent number: 8687263
    Abstract: A light control film includes two transparent electroconductive resin substrates each having a transparent electroconductive film and a transparent resin substrate; and a light control layer sandwiched between the transparent electroconductive film sides of the two transparent electroconductive resin substrates. The transparent electroconductive film of one transparent electroconductive resin substrate having a primer layer is cut through a cutting line to have a shape of a picture or character, and the cutting line is in a form that a start point for the cutting and an end point for the cutting make a closed region. The closed region of the picture of character is electrically insulated from the transparent electroconductive film around the shape of the picture or character. The light control film enables to improve adhesiveness between film matrix and substrates and to provide stable control function.
    Type: Grant
    Filed: February 9, 2010
    Date of Patent: April 1, 2014
    Assignee: Hitachi Chemical Company, Ltd.
    Inventors: Satoyuki Nomura, Yoshii Morishita, Tooru Tanaka
  • Publication number: 20140087295
    Abstract: Techniques for coating print media are described herein. In an example, a photo imaging assembly is to receive a liquid electrophoretic coating composition assembly on a chargeable surface so as to form a coating layer thereon using electrostatic forces. The coating layer is to be transferred to a print medium.
    Type: Application
    Filed: September 25, 2012
    Publication date: March 27, 2014
    Applicant: HEWLETT-PACKARD DEVELOPMENT COMPANY, L.P.
    Inventors: Omer Gila, Napoleon J. Leoni
  • Publication number: 20140087296
    Abstract: A display element is described. The display element includes: a network; a continuous phase; and a discontinuous mobile phase, which is capable of responding to an externally applied electric field such that under influence of the externally applied electric field, without effecting bulk movement of the continuous phase, the mobile phase displaces from one location to another location through or within the network. A process of manufacturing a display cell is also described. The process includes: obtaining a pair of electrodes; placing a network between the electrodes; assembling the electrodes and the network to form a sub-assembly; and injecting into the subassembly a discontinuous phase.
    Type: Application
    Filed: October 1, 2013
    Publication date: March 27, 2014
    Applicant: Zikon Inc.
    Inventors: Mateusz Bryning, Zbigniew Bryning, Remy Cromer
  • Publication number: 20140085706
    Abstract: A polychrome electrophoretic ink including at least four types of particles dispersed in a nonpolar organic medium, each particle type containing a pigment of a color which is associated therewith, having a positive or negative electrostatic charge, characterized in that at least one of the abovementioned particle types has a magnetic property (magnetic core) such that each particle type can migrate in a predetermined manner under the combined action of an electrostatic force and of a magnetic return force.
    Type: Application
    Filed: October 9, 2012
    Publication date: March 27, 2014
    Applicants: ARKEMA FRANCE, CENTRE NATIONAL DE LA RECHERCHE SCINETIFIQUE, UNIVERSITE DE BORDEAUX 1, INSITITUT POLYTECHNIQUE DE BORDEAUX
    Inventors: Cyril Brochon, Georges Hadziioannou, Antoine Charbonnier
  • Patent number: 8681415
    Abstract: An electrophoretic display device in which a barrier defining a unit pixel is directly formed on a first substrate and the unit pixel is filled with an electrophoretic material, and a fabrication method thereof are provided. A barrier surrounding a display area is formed on a non-display area and a sealant is filled between the barrier and a partition wall to facilitate an attachment of first and second substrates.
    Type: Grant
    Filed: July 13, 2011
    Date of Patent: March 25, 2014
    Assignee: LG Display Co., Ltd.
    Inventors: Sang-Il Shin, Oh-Nam Kwon, Seung-Han Paek, Choon-Ho Park
  • Patent number: 8675274
    Abstract: In one embodiment of the invention there is provided a device for modulating light. The device comprises a plurality of nano-scale particles; a conformal structure defining a surface to which the nano-scale particles conform under influence of a displacement force; and a displacement mechanism to apply the displacement force to the nano-scale particles; wherein the nano-scale particles when they conform to the conformal structure change the optical characteristics of the conformal structure.
    Type: Grant
    Filed: September 27, 2010
    Date of Patent: March 18, 2014
    Inventor: Mark W Miles
  • Patent number: 8652565
    Abstract: A sealing method is applicable to a cell matrix equipped with a plurality of cells spatially divided by a partition for sealing dispersion liquid containing hydrophobic dispersion medium and electrophoretic particles dispersed therein in the cells. The sealing method includes: supplying the dispersion liquid in the cells through an opening section of a space defined by the partition; and forming a sealing layer at an exposed portion of the dispersion liquid in the opening section, using a polymer reaction at an interface with water.
    Type: Grant
    Filed: March 26, 2010
    Date of Patent: February 18, 2014
    Assignee: Seiko Epson Corporation
    Inventor: Harunobu Komatsu
  • Patent number: 8654070
    Abstract: Electrophoretic particles including mother particles and a dispersant that covers the surface of the mother particles, the mother particles including a resin and a colorant, and the dispersant having a structure represented by the following Formula (1): wherein in Formula (1), R1 represents a dimethyl siloxane chain that comprises two or more dimethyl siloxane structures that are linked together, the dimethyl siloxane chain being optionally substituted by an organic group; R2 represents a hydrogen atom or a methyl group; Ar1 represents an organic group having an aromatic group; a represents an integer of from 8 to 88; b represents an integer of from 12 to 82; c represents an integer of from 0 to 30; f represents an integer of from 1 to 3; the total of a, b and c is 100; and the ratio of unit (b) in the dispersant having a structure represented by Formula (1) is about 50% by weight or less.
    Type: Grant
    Filed: March 15, 2010
    Date of Patent: February 18, 2014
    Assignee: Fuji Xerox Co., Ltd.
    Inventors: Nami Tokunaga, Jun Kawahara, Daisuke Nakayama, Yasuo Yamamoto, Hiroaki Moriyama
  • Patent number: 8634128
    Abstract: An electrophoretic element includes an electrophoretic particle, and a porous layer formed of a fibrous structure having a non-electrophoretic particle with different optical reflection characteristics from optical reflection characteristics of the electrophoretic particle. A difference ?1 (=A?B) between a solubility parameter value A of the fibrous structure and a solubility parameter value B of a particle surface of the electrophoretic particle is 2 or more and 5.2 or less.
    Type: Grant
    Filed: March 6, 2012
    Date of Patent: January 21, 2014
    Assignee: Sony Corporation
    Inventors: Hidehiko Takanashi, Ken Kobayashi, Aya Shuto
  • Publication number: 20140016180
    Abstract: In an electrophoretic material, first particles which are charged with a first polarity and second particles which are charged with a second polarity are dispersed in a solvent. A volume, which is obtained by dividing a volume of the solvent by a total number of particles, is called free volume, and a radius of a spherical space, which is occupied by sum of an average volume of the particles and the free volume, is called a free volume radius. A first particle average radius is greater than a second particle average radius. A difference between the free volume radius and the first particle average radius is greater than the second particle average radius. An electric charge amount of the second particles is greater than an electric charge amount of the first particles.
    Type: Application
    Filed: July 9, 2013
    Publication date: January 16, 2014
    Inventor: Yasushi YAMAZAKI
  • Publication number: 20140009818
    Abstract: A polychrome electrophoretic ink including at least four types of particles dispersed in a nonpolar organic medium, each particle type containing a pigment of a color which is associated therewith, having a positive or negative electrostatic charge, characterized in that at least one of the abovementioned particle types has a magnetic property (magnetic core) such that each particle type can migrate in a predetermined manner under the combined action of an electrostatic force and of a magnetic return force.
    Type: Application
    Filed: September 11, 2013
    Publication date: January 9, 2014
    Applicants: ARKEMA FRANCE, CENTRE NATIONAL DE LA RECHERCHE SCIENTIFIQUE, UNIVERSITE DE BORDEAUX 1, INSTITUT POLYTECHNIQUE DE BORDEAUX
    Inventors: Cyril BROCHON, Georges HADZIIOANNOU, Antoine CHARBONNIER
  • Patent number: 8605353
    Abstract: A liquid for electrophoretic display which makes it possible to display a black color having a low reflectance or a color having a high color saturation and a white color having a high reflectance and display them at high contrast and which inhibits coagulation of white fine particles and is excellent in stability can be prepared by using a liquid for electrophoretic display containing at least white fine particles, resin particles colored by a dye and/or a pigment and a liquid phase dispersion medium, wherein fine particles in which a difference in a refractive index from the liquid phase dispersion medium is 0 to 0.05 are contained and have an average particle diameter of 50 to 500 nm. The electrophoretic display device of the present invention is prepared by filling the liquid for electrophoretic display between a pair of substrates, and the electronic device of the present invention is characterized by mounting therein the electrophoretic display device.
    Type: Grant
    Filed: March 2, 2010
    Date of Patent: December 10, 2013
    Assignee: Mitsubishi Pencil Co., Ltd.
    Inventor: Yosuke Setagawa
  • Patent number: 8581899
    Abstract: A display medium includes a pair of substrates, a dispersion medium sealed between the pair of substrates, a migrating particle group dispersed in the dispersion medium, and a surface layer provided on at least one of the facing surfaces of the pair of substrates and including a polymer compound that is a copolymer containing the following constitutional unit (A) and constitutional unit (B), X represents a group containing a silicone chain, Ra1 and Ra2 each independently represent a hydrogen atom or a methyl group, Rb2 represents an organic group containing a substituted or unsubstituted phenyl group, n1 and n2 each represent mol % of the constitutional unit relative to the whole copolymer and satisfy 0<n1<50 and 0<n2<80, respectively, and n represents a natural number of 1 or more and 3 or less.
    Type: Grant
    Filed: February 9, 2011
    Date of Patent: November 12, 2013
    Assignee: Fuji Serox Co., Ltd.
    Inventors: Hiroaki Moriyama, Yasuo Yamamoto, Yoshinori Machida, Ryota Mizutani
  • Patent number: 8576476
    Abstract: 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.
    Type: Grant
    Filed: May 23, 2011
    Date of Patent: November 5, 2013
    Assignee: E Ink Corporation
    Inventors: Stephen J. Telfer, Richard J. Paolini, Jr., Sunil Krishna Sainis, Randall M. Hill, Isaac W. Moran, Lee Yezek, Alain Bouchard, William Vetterling, George G. Harris, Hywel Morgan, Luke Slominski, Jay William Anseth, Jennifer Quimby, Craig A. Herb
  • Patent number: 8570639
    Abstract: An electrophoretic liquid includes a first electrophoretic particle, a second electrophoretic particle having a polarity opposite to that of the first electrophoretic particle, a non-electrophoretic particle, and a transparent dispersion medium. In the electrophoretic liquid, the first, second, and non-electrophoretic particles are dispersed in the transparent dispersion medium.
    Type: Grant
    Filed: November 26, 2009
    Date of Patent: October 29, 2013
    Assignees: Ricoh Company, Ltd., Chiba University
    Inventors: Masahiro Masuzawa, Takashi Kitamura, Yoshitaku Yoshimatsu
  • Patent number: 8553317
    Abstract: An electrophoresis device, includes: a migrating particle; a porous layer including a fibrous structure holding a non-migrating particle having optical reflection characteristics different from optical reflection characteristics of the migrating particle; and a light-transmissive dividing wall including part of the porous layer.
    Type: Grant
    Filed: August 16, 2012
    Date of Patent: October 8, 2013
    Assignee: Sony Corporation
    Inventors: Atsuhito Yasui, Hiroyuki Yasukochi
  • Patent number: 8547324
    Abstract: An electrophoretic display sheet comprising a display layer, a first electrode, and second electrodes. The display layer has a plurality of reservoir portions filled with a dispersion liquid containing particles. Each of the plurality of reservoir portions has predetermined positions. When an electric field having a direction is generated by applying a voltage to between the first electrode and the second electrodes, the particles are locally gathered to the predetermined positions of each of the plurality of reservoir portions so as to make rows of the particles along the direction of the electric field in the dispersion liquid. The electrophoretic display sheet is capable of exhibiting both superior responsiveness (responsibility) and superior color display performance with high contrast in changing a display color.
    Type: Grant
    Filed: May 12, 2009
    Date of Patent: October 1, 2013
    Assignees: Seiko Epson Corporation, Nippon Shokubai Co., Ltd.
    Inventors: Harunobu Komatsu, Hitoshi Yamamoto, Akira Matsumoto, Mitsuo Kushino, Tomoyuki Kuwamoto, Teruki Matsushita
  • Patent number: 8542431
    Abstract: An electrophoretic device includes an electrophoretic particle, a porous layer formed of a fibrous structure containing a non-electrophoretic particle having optical reflection characteristics different from optical reflection characteristics of the electrophoretic particle, and a pair of electrodes arranged with the porous layer in between. The porous layer is adjacent to one or both of the pair of electrodes.
    Type: Grant
    Filed: March 15, 2012
    Date of Patent: September 24, 2013
    Assignee: Sony Corporation
    Inventors: Aya Shuto, Hidehiko Takanashi, Ken Kobayashi, Atsuhito Yasui, Ryo Kasegawa
  • Publication number: 20130244148
    Abstract: An electrophotographic photoreceptor includes a conductive substrate, a photosensitive layer, and a surface layer that is provided on the photosensitive layer. The surface layer includes a cross-linked component which is a reaction product of compound A and compound B. The compound A is at least one compound selected from guanamine compounds and melamine compounds, and the compound B is a charge-transporting material. A structure derived from at least one compound selected from the guanamine compounds and the melamine compounds included in the surface layer amounts for 0.1% by weight to 5% by weight, and a structure derived from the charge-transporting material included in the surface layer amounts for 85% by weight or greater. Surface roughness Rz of the surface layer is from 0.1 ?m to 0.3 ?m, and the surface has at least one compound selected from fatty acid metal salt and fluorine resin particles.
    Type: Application
    Filed: September 25, 2012
    Publication date: September 19, 2013
    Applicant: FUJI XEROX CO., LTD.
    Inventors: Yuko YAMANO, Daisuke HARUYAMA, Shinya YAMAMOTO
  • Patent number: 8520292
    Abstract: This invention relates to an electrophoretic display comprising a plurality of cells, each of said cells comprises: a) partition walls; b) an electrophoretic fluid filled therein; c) a polymeric sealing layer to enclose the electrophoretic fluid within the cell; and d) an interface between the electrophoretic fluid and the sealing layer.
    Type: Grant
    Filed: April 1, 2010
    Date of Patent: August 27, 2013
    Assignee: SiPix Imaging, Inc.
    Inventors: Rong-Chang Liang, Mary Chan-Park, Scott C-J Tseng, Zarng-Arh George Wu, HongMei Zang
  • Patent number: 8520295
    Abstract: A reflective display includes a first transparent substrate and a second transparent substrate. First and second electrodes are connected to each of the first and second transparent substrates, and define a space between the first and second transparent substrates. The geometry of the first and second electrodes creates a substantially uniform electric field when a voltage is applied to the first and second electrodes.
    Type: Grant
    Filed: June 28, 2011
    Date of Patent: August 27, 2013
    Assignee: Hewlett-Packard Development Company, L.P.
    Inventor: Pavel Kornilovich
  • Publication number: 20130194655
    Abstract: An electrophoretic particle includes a core particle and a coating layer covering at least one portion of the core particle. The coating layer contains a polymer and a silane coupling agent containing a nonionic charged group attached to the surface of the core particle. The polymer contains a silane coupling agent containing a polymerizable group attached to the surface of the core particle and a polymerization site formed by polymerizing a monomer using the polymerizable group as a starting point.
    Type: Application
    Filed: January 23, 2013
    Publication date: August 1, 2013
    Applicant: SEIKO EPSON CORPORATION
    Inventor: SEIKO EPSON CORPORATION
  • Patent number: 8493648
    Abstract: Provided are a method of fabricating an electrophoretic ink, the electrophoretic ink formed using the method, and an electrophoretic display having the same. The method of fabricating an electrophoretic ink includes dispersing pigment particles into a dielectric fluid; adding at least one monomer and an initiator into the dielectric fluid; and forming polymeric membranes surrounding the pigment particles in the dielectric fluid. Since the pigment particle surrounded by the polymeric membrane and the dielectric fluid in which the pigment particle is dispersed can be utilized as the electrophoretic ink as they are without a follow-up cleaning process, the method of fabricating the electrophoretic ink is simplified.
    Type: Grant
    Filed: April 22, 2010
    Date of Patent: July 23, 2013
    Assignee: Electronics and Telecommunications Research Institute
    Inventors: Chul Am Kim, Hyeonjung Yoo, Kyung Soo Suh, Seung Youl Kang
  • Patent number: 8482844
    Abstract: An electrophoretic element includes: an electrophoretic particle; a porous layer formed of a fibrous structure containing a non-migrating particle having optical reflective characteristics different from those of the electrophoretic particle and having a plurality of pores; and a partition that is partially adjacent to the porous layer and defines a space for accommodating the electrophoretic particle. An area rate of the pores per unit area of the porous layer is small in an adjacent region where the partition is adjacent to the porous layer compared with in a non-adjacent region where the partition is not adjacent to the porous layer.
    Type: Grant
    Filed: January 26, 2012
    Date of Patent: July 9, 2013
    Assignee: Sony Corporation
    Inventors: Atsuhito Yasui, Hidehiko Takanashi, Ken Kobayashi, Ryo Kasegawa, Aya Shuto
  • Patent number: 8432598
    Abstract: A transparent conductor structure includes a transparent, insulating substrate and a discontinuous, transparent conducting layer established on the substrate. The discontinuous conducting layer is partitioned into a plurality of segments, each of which has a thickness ranging from about 1 nm to about 10 ?m. Two or more of the segments are connected together by i) a metal trace disposed on or between them, or ii) a mesh, formed from a plurality of metal traces, disposed across a surface of the segments.
    Type: Grant
    Filed: November 25, 2009
    Date of Patent: April 30, 2013
    Assignee: Hewlett-Packard Development Company, L.P.
    Inventors: Jong-Souk Yeo, Gregg Alan Combs, Tim R. Koch
  • Publication number: 20130078559
    Abstract: This invention relates to white reflective polymer particles prepared by a reverse emulsion solvent removal process, electrophoretic fluids comprising such particles, and electrophoretic display devices comprising such fluids.
    Type: Application
    Filed: May 30, 2011
    Publication date: March 28, 2013
    Applicant: Merck Patent GmbH
    Inventors: Louise Diane Farrand, Mark John Goulding, Roger Kemp, Jonathan Henry Wilson
  • Patent number: 8363306
    Abstract: The present invention is directed to an electrophoretic display fluid, in particular, pigment particles dispersed in a solvent or solvent mixture, and methods for their preparation. The pigment particles generated, according to the present invention, are stable in solvent under an electric field, have desired charge and charge density on the particle surface.
    Type: Grant
    Filed: April 4, 2011
    Date of Patent: January 29, 2013
    Assignee: SiPix Imaging, Inc.
    Inventors: Hui Du, Xiaojia Wang, HongMei Zang, Haiyan Gu
  • Patent number: 8323392
    Abstract: In a composition comprising an oil-in-oil emulsion containing a first oil phase dispersed as liquid droplets in a continuous second oil phase, which liquid droplets have a number median diameter of about 1 ?m to 10 ?m, the liquid droplets are substantially covered with a layer of relatively smaller hydrophobically surfaced solid particles as a result of controlling the size and size distribution of the liquid droplets. The first oil phase optionally further comprises colorant and/or polymer. Also disclosed is a method for making such oil-in-oil emulsions.
    Type: Grant
    Filed: February 13, 2006
    Date of Patent: December 4, 2012
    Assignee: Eastman Kodak Company
    Inventors: Tamara K. Jones, Mridula Nair
  • Patent number: 8270063
    Abstract: The invention relates to an electrophoretic display, comprising electrodes and cells containing at least one kind of ionic, monochrome particles, a non-polar liquid and a dispersant, wherein the ionic, monochrome particles of at least one kind are essentially aggregates consisting of a carbon containing pigment and a cationic pigment orcationic pigment derivative, and the dispersantis selected from the group consisting of polyacrylates, polyesters, polyurethanes and copolymers, with the proviso that the cationic pigment or cationic pigment derivative is not a reaction product of carbonblack with diazotated procaine hydrochloride. In general, the whole quantity of the pigment and the main part, preferably at least 80%, most preferred from 95% to 100%, of the whole cationic pigment or cationic pigment derivative present within the cells is comprised in the aggregates, with essentially no pigment and only a minor part of the cationic pigment or cationic pigment derivative physically distinct from the aggregates.
    Type: Grant
    Filed: August 28, 2008
    Date of Patent: September 18, 2012
    Assignee: BASF SE
    Inventors: Margherita Fontana, Gerardus De Keyzer, Philippe Bugnon, Marcel Hahn, Kishor Kumar Mistry, Clemens Auschra
  • Publication number: 20120229885
    Abstract: An electrophoretic display medium and preparing method thereof. The electrophoretic display medium comprises: negatively or positively-charged pigment particles; neutral pigment particles with colors different from the charged pigment particles; and low-polar and/or non-polar dispersing solvent. The method of preparing the electrophoretic display medium comprises: synthesizing neutral pigment particles; synthesizing charged pigment particles; and preparing electrophoretic display medium. The method of synthesizing the neutral pigment particles comprises: mixing together pigment particles, macromonomers, coupling-agents and chain-initiators for polymeric reaction in the solvent, and reacting at a temperature of 30-120° C. for 4-48 hours. The method is applied to many kinds of inorganic oxides, inorganic salts and complex inorganic salt pigments.
    Type: Application
    Filed: December 28, 2009
    Publication date: September 13, 2012
    Applicant: GUANGZHOU OED TECHNOLOGIES CO., LTD.
    Inventors: Yu Chen, Lei Zhang, Zuliang Liu, Xi Zeng, Songli Wei
  • Patent number: 8257614
    Abstract: This invention relates to improved electrophoretic dispersions and a method for improving the performance of an electrophoretic display. The invention also relates to a method of inducing or enhancing the threshold voltage of an electrophoretic dispersion.
    Type: Grant
    Filed: May 22, 2009
    Date of Patent: September 4, 2012
    Assignee: SiPix Imaging, Inc.
    Inventors: Haiyan Gu, HongMei Zang, Jiunn Jye Hwang, Xin Weng, Jack Hou, Chih-Yuan Liao, Shih-Wei Ho, Rong-Chang Liang
  • Patent number: RE44484
    Abstract: An active matrix electrophoretic display is driven. In a reset period Tr a reset voltage is applied to each pixel electrode. Next, in a writing period an applied voltage is applied to each of said pixel electrode during a time period corresponding to a gradation value designated by an image data. Next, a common voltage is applied to each of said pixel electrode, so that electric charge accumulated in each capacitor is taken away and no electric field is applied to each dispersal system, thereby a displayed image is held.
    Type: Grant
    Filed: April 2, 2010
    Date of Patent: September 10, 2013
    Assignee: Seiko Epson Corporation
    Inventor: Makoto Katase