Electrophoretic Imaging, Process, Composition, Or Product Patents (Class 430/32)
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Patent number: 7208211Abstract: In an electrophotographic belt member comprising a resin composition, the resin composition contains from 30% by weight to 90% by weight of a thermoplastic resin, from 2% by weight to 30% by weight of a compound selected from the group consisting of a polyether-ester amide, a polyether ester and a polyether amide, from 0% by weight to 5% by weight of an electrolyte, and from 2% by weight to 50% by weight of an insulating filler. Also disclosed are a process for producing the electrophotographic belt member, and an electrophotographic apparatus having the electrophotographic belt member.Type: GrantFiled: September 18, 2001Date of Patent: April 24, 2007Assignee: Canon Kabushiki KaishaInventors: Atsushi Tanaka, Akihiko Nakazawa, Tsunenori Ashibe, Takashi Kusaba, Hidekazu Matsuda
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Patent number: 7209281Abstract: Electrophoretic display devices and contactless communication media are provided. A display electrode pattern, a first voltage application circuit to apply a voltage between the display electrode pattern and a transparent electrode, and a wiring pattern that electrically conducts the first voltage application circuit and the display electrode pattern are provided on the side of the back surface of a substrate. Also, a BG electrode pattern, a loop pattern of a predetermined height, and the transparent electrode are provided on the side of the surface of the substrate. Multiple electrophoretic particles and a dispersion medium to disperse the electrophoretic particles are enclosed inside the loop pattern and between the substrate and the transparent electrode. A voltage is applied between the transparent electrode and the display electrode pattern by the first voltage application circuit thereby causing the electrophoretic particles to migrate in the dispersion medium to display a desired image.Type: GrantFiled: April 20, 2005Date of Patent: April 24, 2007Assignee: Seiko Epson CorporationInventor: Yoshiki Takei
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Patent number: 7202992Abstract: An electrophoretic display device of the present invention is formed of a first substrate, a second substrate, and microcapsules which are accommodated between these substrates and which contain an electrophoretic dispersion, wherein each of the microcapsules has an opening in at least a part thereof.Type: GrantFiled: May 31, 2006Date of Patent: April 10, 2007Assignee: Seiko Epson CorporationInventor: Hideyuki Kawai
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Patent number: 7201967Abstract: In an electrophotographic endless belt having a resin layer formed of a resin composition containing a polyamide, the resin composition further contains a copolymer obtained by copolymerization of an olefin and an oxygen-containing heterocyclic compound, a curve (T-log10 ? curve) showing the relationship between temperature T (° C.) and common logarithm log10 ? of melt viscosity ? (Pa·s), of the resin composition has, in the range of log10 ? of from log10 1,000 to log10 8,000, a gently inclined region the inclination ? log10 ?/?T of which is from ?0.02 to 0, and the gently inclined region has a temperature range of 10° C. or more, and the resin layer has a thickness the maximum thickness of which is 115% or less of the average value of the thickness of the resin layer and the minimum thickness of which is 85% or more of the average value of the thickness of the resin layer. Also disclosed is a process for producing the above electrophotographic endless belt.Type: GrantFiled: November 24, 2004Date of Patent: April 10, 2007Assignee: Canon Kabushiki KaishaInventors: Yuji Sakurai, Akihiko Nakazawa, Atsushi Tanaka, Hidekazu Matsuda, Takashi Kusaba
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Patent number: 7193769Abstract: An electrophoretic display includes a transparent polymeric film including at least one cavity including a first particle species and a second particle species. Application of an electrical field causes the first particle species and the second particle species to separate from one another, and align on opposite sides of the cavity. Subsequent electric field applications cause migration of the first and second particle species, affecting a color state of the display. The electrophoretic display may be fabricated from multiple display cells arranged on a substrate.Type: GrantFiled: May 13, 2005Date of Patent: March 20, 2007Assignee: Xerox CorporationInventors: San-Ming Yang, Ahmed Hoyshel Alzamly, Man-Chung Tam, Peter Michael Kazmaier, Thomas Edward Enright
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Patent number: 7184196Abstract: An electrophoretic display of the type wherein a dispersion liquid for migration and a plurality of charged particles are sandwiched between a first substrate and a second substrate is produced through a process comprising: a latent image forming step of forming an electrostatic latent image on an adsorption member; a developing step of causing the adsorption member to contact the dispersion liquid in which the charged particles are dispersed, thereby to attach the charged particles together with the dispersion liquid onto a surface of the adsorption member on which the latent image is formed; a transfer step of transferring the charged particles from the surface of the adsorption member to the second substrate together with the dispersion liquid; and a sealing step of bonding the first substrate to the second substrate to seal the charged particles and the dispersion liquid, therebetween.Type: GrantFiled: January 26, 2004Date of Patent: February 27, 2007Assignee: Canon Kabushiki KaishaInventor: Nobutaka Ukigaya
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Patent number: 7158283Abstract: A method of manufacturing a display that includes a first substrate having a pixel electrode, a second substrate having a common electrode, and a microcapsule interposed between the first and second substrates, a display material being encapsulated in the microcapsule, an optical characteristic of the display material changing in response to an electrical stimulus. The method includes: selectively disposing a microcapsule material that includes the microcapsule on a display area formed of the pixel electrode of the first substrate or an area, of the second substrate, corresponding to the display area; drying the microcapsule material; and joining the first substrate to the second substrate after the drying.Type: GrantFiled: November 8, 2005Date of Patent: January 2, 2007Assignee: Seiko Epson CorporationInventor: Hideyuki Kawai
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Patent number: 7142350Abstract: This invention relates to a display device, the device comprising: a transparent surface; a suspension media disposed against the transparent surface; a plurality of color particles disposed throughout the suspension media, wherein each color of particle has a different time response to an applied electric field than each other color of particle; and an input instrument located substantially adjacent to the transparent surface such that the input instrument is operated to cause a portion of the color particles to migrate towards the transparent surface.Type: GrantFiled: October 7, 2004Date of Patent: November 28, 2006Assignee: Hewlett-Packard Development Company, L.P.Inventors: Gregory J. May, Philip S. Burkum
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Patent number: 7118838Abstract: An apparatus for forming an image using an electrophoretic particle suspension containing media including: a transitioner for sufficiently lowering a viscosity of the suspension to facilitate mobility of at least some of the electrophoretic particles; and, imaging electrodes for selectively providing an imaging electric field associated with the image to be formed and positioned with respect to the transitioner such that the imaging electric field impinges upon the lowered viscosity suspension; wherein, the imaging electric field is sufficient to cause select ones of the electrophoretic particles in the lowered viscosity suspension to migrate depending upon the image to be formed.Type: GrantFiled: March 26, 2004Date of Patent: October 10, 2006Assignee: Brother International CorporationInventors: James Douglas Fletcher, Kangning Liang, Mark Anthony Darty
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Patent number: 7110162Abstract: The invention relates to a novel electrophoretic dispersion comprising a fluorinated solvent as the continuous phase, charged pigment particles or pigment containing microcapsules as the dispersed phase, and the charge of the pigment particles is provided by a charge controlling agent comprising: (i) a soluble fluorinated electron accepting or proton donating compound or polymer in the continuous phase and an electron donating or proton accepting compound or polymer in the dispersed phase; or (ii) a soluble fluorinated electron donating or proton accepting compound or polymer in the continuous phase and an electron accepting or proton donating compound or polymer in the dispersed phase.Type: GrantFiled: December 31, 2002Date of Patent: September 19, 2006Assignee: SiPix Imaging, Inc.Inventors: Zarng-Arh George Wu, Huiyong Paul Chen, Wan Peter Hsu, Rongchi Yu, Mahmoud-Zohdi Armoush, Rong-Chang Liang
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Patent number: 7079302Abstract: An electrophoretic display device 20 of the present invention is formed of a first substrate 1, a second substrate 2, and microcapsules which are accommodated between these substrates and which contain an electrophoretic dispersion 10, wherein each of the microcapsules has an opening in at least a part thereof.Type: GrantFiled: August 19, 2002Date of Patent: July 18, 2006Assignee: Seiko Epson CorporationInventor: Hideyuki Kawai
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Patent number: 7072095Abstract: This invention relates to an electrophoretic display with improved contrast ratio, switching performance, reflectivity at the Dmin state and structural integrity, and methods for its manufacture.Type: GrantFiled: October 29, 2003Date of Patent: July 4, 2006Assignee: SiPix Imaging, Inc.Inventors: Rong-Chang Liang, Jack Hou, Yajuan Chen, Scott C-J Tseng, Jerry Chung
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Patent number: 7061663Abstract: An encapsulation material, intended for use in encapsulated electrophoretic displays, comprises the coacervation product of a polyanionic polymer having a vinyl main chain and a plurality of anionic groups bonded to the main chain, with a cationic or zwitterionic water-soluble polymer capable of forming an immiscible second phase on contact with the polyanionic polymer.Type: GrantFiled: September 12, 2005Date of Patent: June 13, 2006Assignee: E Ink CorporationInventors: Lan Cao, Libing Zhang, Charles H. Honeyman, Kimberly L. Houde, Andrew L. Loxley, David D. Miller, Richard J. Paolini, Jr., Tibyron Quinn, Michael L. Steiner, Thomas H. Whitesides
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Patent number: 7057798Abstract: An apparatus includes a substrate, charged particles, a transparent electrode disposed in parallel with a surface of the substrate, an electrode disposed at a periphery of the transparent electrode, means for applying a voltage between the transparent electrode and the electrode disposed at the periphery thereof to move the charged particles laterally, a reflection surface for reflecting light incident onto in the substrate, and a light scattering or absorption layer disposed between the transparent electrode and the reflection surface. The apparatus is effective in providing a desired scattering ability without increasing a drive voltage.Type: GrantFiled: May 4, 2004Date of Patent: June 6, 2006Assignee: Canon Kabushiki KaishaInventor: Nobutaka Ukigaya
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Patent number: 7015893Abstract: Electrophoretic displays (100, 400) comprise suspensions in one or more bodies of liquid (116, 418, 426) of reflective particles (118, 420), and photoluminescent particles (120, 422). The one or more bodies of liquid are located between a front wall (104, 402) and a back wall (102, 404). Electrodes (128, 129, 410, 412) and optionally a transparent ground plane layer (124) are provided for applying electric fields to the suspensions according to image information. The reflective particles and the photoluminescent particles are characterized by the electrophoretic mobilities of the same sign, and therefore move in the same direction in response to applied fields. A source of radiation (140, 428) capable of exciting photoluminescence of the photoluminescent particles is optically coupled to the liquid suspensions. An optical filter layer is optionally located at the front of the displays. The display is capable of operating under a wide range of ambient light conditions.Type: GrantFiled: January 31, 2003Date of Patent: March 21, 2006Assignee: Motorola, Inc.Inventors: Zili Li, Zane Coleman
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Patent number: 7009756Abstract: An electrophoretic display device capable of realizing a stable memory characteristic without relying on a circuit-open state is provided. The electrophoretic display device has a cell structure including at least two electrodes, fixing surfaces each associated with one of the at least two electrodes an electrophoretic layer disposed in the cell and comprising an insulating liquid and colored charged particles disposed in the electrophoretic layer, and voltage application device for applying a voltage between the electrodes thereby causing migration of the colored charged particles toward and collective attachment onto one of the fixing surfaces; wherein the fixing surfaces are provided with a charged film having a constant surface charge of a polarity opposite to that of the colored charged particles, regardless of a polarity of electricity supplied to the associated electrodes.Type: GrantFiled: June 28, 2004Date of Patent: March 7, 2006Assignee: Canon Kabushiki KaishaInventors: Etsuro Kishi, Yoshinori Tomida
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Patent number: 7002728Abstract: Copper chromite particles can advantageously be used as black particles in electrophoretic media and displays. Preferably, the copper chromite particles are coated with a silica coating and a polymer coating.Type: GrantFiled: February 9, 2004Date of Patent: February 21, 2006Assignee: E Ink CorporationInventors: Anthony Edward Pullen, Thomas H. Whitesides, Charles H. Honeyman, Barrett Comiskey, Jonathan D. Albert
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Patent number: 6972893Abstract: This invention relates to the field of electrophoretic displays. In particular, it relates to imagewise opening, filling, and sealing multicolor display components and the manufacture of multicolor displays.Type: GrantFiled: October 30, 2002Date of Patent: December 6, 2005Assignee: SiPix Imaging, Inc.Inventors: Xianhai Chen, HongMei Zang, Zarng-Arh George Wu, Rong-Chang Liang
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Patent number: 6956691Abstract: The present invention provides an electrophoretic display in which an insulating liquid is uniformly provided to the divided microspaces each corresponding to one pixel and display characteristics uniform over the display surface are actualized. The present invention includes a transparent first substrate 1 and a transparent second substrate 2 arranged with a predetermined gap therebetween, charged particles 6 dispersed in an insulating liquid 5 provided to the gap, and a first electrode 3 and a second electrode 4 arranged on either of the first substrate 1 and the second substrate 2, wherein liquid-repellency parts 8 and repellency-lowered parts 9 are arranged on the surface of the first substrate 1 and the surface of the second substrate 2, and the insulating liquid 5 is provided to the repellency-lowered parts on the surface of the first substrate 1 and the surface of the second substrate 2.Type: GrantFiled: December 16, 2004Date of Patent: October 18, 2005Assignee: Hitachi, Ltd.Inventors: Hiroki Kaneko, Tetsuya Ooshima, Tatsuya Sugita, Shinichi Komura, Shoichi Hirota, Hiroshi Sasaki
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Patent number: 6940634Abstract: An electrophoretic display device includes a first substrate and a second substrate disposed opposite to each other with a spacing, a partition wall for dividing the spacing into a plurality of sections, a plurality of electrophoretic particles and an insulating liquid which are disposed in the sections, a first electrode disposed at least between said partition wall and said first substrate, and a second electrode disposed on said second substrate. The electrophoretic display device is characterized in that the first electrode has an adhesive property, thus eliminating the need for a step of applying an adhesive resin for adhering the partition wall and the substrate to simplify production steps.Type: GrantFiled: March 24, 2004Date of Patent: September 6, 2005Assignee: Canon Kabushiki KaishaInventor: Nobutaka Ukigaya
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Patent number: 6930818Abstract: This invention relates to an electrophoretic display comprising cells of well-defined shape, size and aspect ratio which cells are filled with charged pigment particles dispersed in a solvent, and novel processes for its manufacture.Type: GrantFiled: March 3, 2000Date of Patent: August 16, 2005Assignee: SiPix Imaging, Inc.Inventors: Rong-Chang Liang, Mary Chan-Park, Scott C-J Tseng, George Wu, HongMei Zang
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Patent number: 6923923Abstract: Disclosed are a metallic nanoparticle cluster ink and a method for forming a conductive metal pattern using the cluster ink. The metallic nanoparticle cluster ink comprises colloidal metallic nanoparticles and a bifunctional compound. The conductive metal pattern is formed by forming a metallic nanoparticle pattern on a substrate using a mold made from PDMS (poly(dimethylsiloxane) polymer as a stamp, and heat-treating the substrate. Micrometer-sized conductive metal patterns can be easily formed on various substrates in a simple and inexpensive manner without the use of costly systems, thereby being very useful in various industrial fields.Type: GrantFiled: December 27, 2002Date of Patent: August 2, 2005Assignees: Samsung Electronics Co., Ltd., Korea Advanced Institute of Science and TechnologyInventors: Jin Woo Cheon, Sung Nam Cho, Jong Il Park, Kyung Bok Lee, Seok Chang, Soon Taik Hwang
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Patent number: 6914714Abstract: This invention relates to the field of electrophoretic displays. In particular, it relates to imagewise opening, filling, and sealing multicolor display components and the manufacture of multicolor displays.Type: GrantFiled: March 9, 2004Date of Patent: July 5, 2005Assignee: SiPix Imaging Inc.Inventors: Xianhai Chen, HongMei Zang, Zarng-Arh George Wu, Rong-Chang Liang
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Patent number: 6906851Abstract: An electrophoretic display device executes a display on the basis of dispersing charged particles in a liquid and moving the charged particles under application of an electric field. The device includes a first substrate having an electrode, a film mounted on the first substrate and forming a closed portion with a surface of the first substrate, and a liquid positioned in the closed portion, with charged particles being dispersed in the liquid.Type: GrantFiled: May 30, 2003Date of Patent: June 14, 2005Assignee: Canon Kabushiki KaishaInventor: Satoshi Yuasa
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Patent number: 6900789Abstract: Disclosed is a reversible image display medium which can be repeatedly used and can display high quality images, in which cells between the two substrates accommodate a dry developer containing at least two kinds of frictionally chargeable dry developing particles having different chargeable polarities and different optical reflection densities; images are displayed by forming an electrostatic latent image corresponding to the image to be formed on one of the two substrates to drive the developing particles in an electrostatic field based on the electrostatic latent image; a developer-facing surface of one of the substrates has a surface resistivity of at least 1×1012 ohm/square; a developer-facing surface of the opposite substrate has a surface resistivity from 1×106 ohm/square to 1×1012 ohm/square; a developer-facing surface of one of the substrates has a surface average median roughness Ra of 0.2 ?m to 0.Type: GrantFiled: November 16, 2001Date of Patent: May 31, 2005Assignee: Minolta Co., Ltd.Inventors: Masahiko Matsuura, Hiroshi Mizuno, Akihito Ikegawa, Masaharu Kanazawa, Keyaki Yogome, Takaji Kurita
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Patent number: 6897996Abstract: An electrophoretic display device is configured to move charged particles between a display electrode surface and a cell wall surface and provides a solution to a problem that many charged particles are collected at the edge of the display electrode to degrade display contrast. The electrophoretic display device is arranged to move the charged particles between the display electrode surface and the side face of the cell wall and the vicinity thereof to implement display, and the second electrode is disposed on a lower face of the cell wall or in the vicinity of the lower face, thereby allowing the particles to be located on the surface of the cell wall. Another electrophoretic display device is provided which has a structure wherein all or part of the display electrode has a protruding shape.Type: GrantFiled: September 5, 2002Date of Patent: May 24, 2005Assignee: Canon Kabushiki KaishaInventors: Tsutomu Ikeda, Nobutaka Ukigaya, Koichi Ishige
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Patent number: 6876486Abstract: An image display medium comprises a display substrate on which an image is displayed and a non-displaying substrate opposing to the substrate, wherein a spacer and black particles and white particles are enclosed between these substrates. The display substrate and non-display substrate each have a transparent electrode, wherein the transparent electrode for the non-display substrate is grounded and the transparent electrode for the display substrate is connected to voltage applying means. As these black particles and white particles, particles for a display device having a weight reduction rate of not more than 0.3% at 100° C. to 240° C. are respectively used.Type: GrantFiled: September 10, 2003Date of Patent: April 5, 2005Assignee: Fuji Xerox Co., Ltd.Inventors: Satoshi Hiraoka, Hidehiko Soyama, Yasuo Yamamoto
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Patent number: 6873451Abstract: An electrophoretic display device includes a pair of substrates arranged with a predetermined gap maintained therebetween, a dispersing fluid disposed between the pair of substrates, a plurality of charged particles mixed in the dispersing fluid, at least a pair of display electrodes arranged on one of the substrates and defining a pixel, and a guard electrode arranged in a border between adjacent pixels. The guard electrode limits the movement of the charged particles to within a single pixel when the guard electrode is biased at a potential higher than (lower than) each of the display electrodes of the two adjacent pixels with the border arranged therebetween if the particles are positively (negatively) charged.Type: GrantFiled: December 13, 2002Date of Patent: March 29, 2005Assignee: Canon Kabushiki KaishaInventor: Nobutaka Ukigaya
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Patent number: 6870661Abstract: An electrophoretic medium comprises a plurality of one or more types of particles suspended in a suspending fluid. The particles include at least one electrically charged, electrophoretically mobile particle capable of translating through the suspending fluid upon application of an electric field to the medium and at least one magnetic particle. A magnet is disposed adjacent the electrophoretic medium to introduce a threshold resistance to magnetic particle movement.Type: GrantFiled: May 7, 2002Date of Patent: March 22, 2005Assignee: E Ink CorporationInventors: Anthony Edward Pullen, Ian D. Morrison, Emily J. Pratt
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Patent number: 6859302Abstract: This invention relates to an electrophoretic display comprising cells of well-defined shape, size and aspect ratio which cells are filled with charged pigment particles dispersed in a solvent, and novel processes for its manufacture.Type: GrantFiled: February 28, 2002Date of Patent: February 22, 2005Assignee: Sipix Imaging, Inc.Inventors: Rong-Chang Liang, Mary Chan-Park, Scott C-J Tseng, George Wu, HongMei Zang
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Patent number: 6850357Abstract: The present invention provides an electrophoretic display in which an insulating liquid is uniformly provided to the divided microspaces each corresponding to one pixel and display characteristics uniform over the display surface are actualized. The present invention includes a transparent first substrate 1 and a transparent second substrate 2 arranged with a predetermined gap therebetween, charged particles 6 dispersed in an insulating liquid 5 provided to the gap, and a first electrode 3 and a second electrode 4 arranged on either of the first substrate 1 and the second substrate 2, wherein liquid-repellency parts 8 and repellency-lowered parts 9 are arranged on the surface of the first substrate 1 and the surface of the second substrate 2, and the insulating liquid 5 is provided to the repellency-lowered parts on the surface of the first substrate 1 and the surface of the second substrate 2.Type: GrantFiled: January 15, 2004Date of Patent: February 1, 2005Assignee: Hitachi, Ltd.Inventors: Hiroki Kaneko, Tetsuya Ooshima, Tatsuya Sugita, Shinichi Komura, Shoichi Hirota, Hiroshi Sasaki
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Patent number: 6833943Abstract: This invention relates to an electrophoretic display comprising cells which are filled with charged particles dispersed in a solvent and are individually sealed with a polymeric sealing layer which is an integral part of the display and is curved.Type: GrantFiled: June 24, 2002Date of Patent: December 21, 2004Assignee: SiPix Imaging, Inc.Inventors: Rong-Chang Liang, Scott C. J. Tseng, Zarng-Arh George Wu, HongMei Zang
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Patent number: 6831770Abstract: This invention relates to an electrophoretic display comprising cells which are filled with charged particles dispersed in a solvent and are individually sealed with a polymeric sealing layer.Type: GrantFiled: March 6, 2002Date of Patent: December 14, 2004Assignee: SiPix Imaging, Inc.Inventors: Rong-Chang Liang, Scott C-J Tseng, Zarng-Arh George Wu, Hongmei Zang
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Publication number: 20040248022Abstract: The invention provides a display device and a light adjusting method thereof capable of carrying out light adjustment effectively by the output control of a light source and, preferably, of effecting light adjustment according to color distribution of a displayed image. The display device of the invention that is capable of adjusting a displayed image by changing light flux can include a plurality of light sources having light emitting diodes, an image analyzing unit for outputting a light control signal for controlling the output of each of the light sources, based on an image signal of the displayed image, and a light control device for controlling the output of each of the light sources based on the light control signals.Type: ApplicationFiled: April 6, 2004Publication date: December 9, 2004Applicant: SEIKO EPSON CORPORATIONInventors: Shohei Yoshida, Hidehito Iisaka
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Patent number: 6829078Abstract: This application is directed to electrophoretic displays and semi-finished display panels comprising display cells prepared from the microcup and top-sealing technologies.Type: GrantFiled: February 21, 2003Date of Patent: December 7, 2004Assignee: SiPix Imaging Inc.Inventors: Rong-Chang Liang, Xiaojia Wang, Hongmei Zang, Jerry Chung
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Patent number: 6825970Abstract: The invention provides a first process for addressing an electro-optic material having first and second display states differing in at least one optical characteristic and being capable of being changed from its first to its second display state by application of an electric field to the material, the process comprising applying an electrically charged fluid to a portion of at least one surface of the material, thereby changing the display state of a portion of the material. The invention also provides a second process for addressing an electro-optic material, this process comprising contacting the electro-optic material with a non-conductive brush means wet with a conductive liquid while applying a potential difference between the brush means and the electro-optic material.Type: GrantFiled: September 13, 2002Date of Patent: November 30, 2004Assignee: E Ink CorporationInventors: Alberto Goenaga, Karl R. Amundson, Michael L. Steiner, Libing Zhang
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Patent number: 6822783Abstract: An electrophoretic display unit has a first substrate and a second substrate counterposed with an interspace, an insulating liquid placed in the interspace, and colored charged electrophoretic particles dispersed in the insulating liquid. A stage is formed in the interspace on the second substrate, with the stage having a first surface facing a thick layer portion of the insulating liquid, a second surface facing a thin layer portion of the insulating liquid, and a side wall surface of the stage connecting the first surface and the second surface. A first display electrode is placed along the first surface, a second display electrode is placed along the second electrode, and a third electrode is placed under the second electrode. An end portion of the third portion is proximate to the side wall surface at a substantially constant distance from the first electrode and the second electrode.Type: GrantFiled: June 24, 2002Date of Patent: November 23, 2004Assignee: Canon Kabushiki KaishaInventors: Yojiro Matsuda, Nobutaka Ukigaya
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Patent number: 6819471Abstract: Improvements and modifications are provided in the type of frustrated total internal reflection electrophoretic systems described in U.S. Pat. No. 6,215,920.Type: GrantFiled: August 16, 2002Date of Patent: November 16, 2004Assignee: E Ink CorporationInventors: Karl R. Amundson, Guy M. Danner, Gregg M. Duthaler, Russell J. Wilcox
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Patent number: 6815143Abstract: Provided are a PED-stabilizer-containing resist material having high sensitivity and high resolution, and sufficient PED stability; and a pattern forming method using the resist material. More specifically, the resist material contains at least one compound selected from thiol derivatives, disulfide derivatives and thiolsulfonate derivatives. This resist material may further contain a dissolution inhibitor and/or surfactant. The pattern forming method comprises steps of applying the resist material to a substrate; after a heat treatment, exposing the substrate to a high energy beam or electron beam through a photomask; and after an optional heat treatment, developing the resist material with a developer.Type: GrantFiled: January 18, 2002Date of Patent: November 9, 2004Assignee: Shin-Etsu Chemical Co., Ltd.Inventor: Satoshi Watanabe
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Patent number: 6788452Abstract: This invention relates to the field of electrophoretic displays. In particular, it relates to processes for the manufacture of multilayer color displays involving imagewise opening and filling display cells with display fluids of different colors. The color displays have improved contrast ratio, switching performance, reflectivity at the Dmin state and structural integrity.Type: GrantFiled: December 4, 2002Date of Patent: September 7, 2004Assignee: SiPix Imaging, Inc.Inventors: Rong-Chang Liang, Zarng-Arh George Wu, Hongmei Zang
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Patent number: 6788449Abstract: This invention relates to an electrophoretic display comprising cells of well-defined shape, size and aspect ratio which cells are filled with charged pigment particles dispersed in a solvent, and novel processes for its manufacture.Type: GrantFiled: August 29, 2001Date of Patent: September 7, 2004Assignee: SiPix Imaging, Inc.Inventors: Rong-Chang Liang, Scott C-J Tseng, Zarng-Arh George Wu, HongMei Zang, Hsiao-Ken Chuang
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Patent number: 6777099Abstract: Polyester films which comprise a stabilizer for inhibiting oxidative degradation, at least some of which has been covalently incorporated into the polymer chain of the polyester through polycondensation during formation of the polyester, have not only high resistance to oxidation but also very few surface defects and high stability during processing, and are suitable not only for use as a packaging material but for a wide variety of other technical applications.Type: GrantFiled: September 12, 2002Date of Patent: August 17, 2004Assignee: Mitsubishi Polyester Film GmbHInventors: Kazuo Tano, Ursula Murschall, Holger Kliesch
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Publication number: 20040147664Abstract: An overcoat layer composition for an organic photoreceptor and an organic photoreceptor using the overcoat layer composition. The overcoat layer composition has improved electric and mechanical properties to be suitably used for an electrophotographic development system. The overcoat layer composition includes anionic aqueous polyurethane dispersion and a fluorine resin.Type: ApplicationFiled: November 18, 2003Publication date: July 29, 2004Applicant: Samsung Electronics Co., Ltd.Inventors: Nam-jeong Lee, Hae-ree Joo, Kyung-yol Yon
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Publication number: 20040131959Abstract: This invention relates to electrophoretic displays having improved performance.Type: ApplicationFiled: October 9, 2003Publication date: July 8, 2004Inventors: Jack Hou, HongMei Zang, Yajuan Chen, Jing-Den Chen, Chih-Yuan Liao, Rong-Chang Liang
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Publication number: 20040131958Abstract: The present invention is directed to novel fluorinated dye stabilizers having both high quenching efficiency and solubility in halogenated solvents. These dye stabilizers have shown a significantly effect on improving the dye fastness in hostile photooxidation conditions.Type: ApplicationFiled: October 14, 2003Publication date: July 8, 2004Inventors: Kai-Chia Feng, Ying-Syi Li, Jin Yang, HongMei Zang, Haiyan Gu, Sundaravel P. Ananthavel, Rong-Chang Liang
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Patent number: 6751008Abstract: This invention relates to an electrophoretic display comprising cells of well-defined shape, size and aspect ratio which cells are filled with charged pigment particles dispersed in a solvent, and novel processes for its manufacture.Type: GrantFiled: September 6, 2002Date of Patent: June 15, 2004Assignee: SiPix Imaging, Inc.Inventors: Rong-Chang Liang, Mary Chan-Park, Scott C-J Tseng, George Wu, HongMei Zang
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Patent number: 6700695Abstract: The display panel comprises surrounding media containing particles which are responsive to changes in a magnetic field are optically anisotropic toward the viewing surface. The electrode film has an array layer and an electrode layer, where the array layer provides a support structure for the electrode layer and electrically non conductive and in contact with the surface of the display panel and having. a plurality of mesa shaped segments where each mesa shaped segment has a top face and side walls extending downward from the top face. The electrode layer formed of an electrically conductive material coats the array layer and is exposed for contact by an electrical stimulus. The electrode layer is thicker on the top face than on the side walls, producing resistive bridges between adjacent top faces. The resistive bridges partially electrically isolate each electrode from the other electrodes in the electrode layer.Type: GrantFiled: March 14, 2001Date of Patent: March 2, 2004Assignee: 3M Innovative Properties CompanyInventors: David A. Engler, Rolf W. Biernath
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Publication number: 20030164480Abstract: The invention relates to a novel electrophoretic dispersion comprising a fluorinated solvent as the continuous phase, charged pigment particles or pigment containing microcapsules as the dispersed phase, and the charge of the pigment particles is provided by a charge controlling agent comprising:Type: ApplicationFiled: December 27, 2002Publication date: September 4, 2003Inventors: Zarng-Arh George Wu, Huiyong Paul Chen, Wan Peter Hsu, Rongchi Yu, Mahmoud-Zohdi Armoush, Rong-Chang Liang
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Patent number: 6587254Abstract: An image display medium that can maintain stable display characteristics without dew condensing on a display substrate surface or on particles in almost all environments in which the image display medium is presumed to be used, even if there are changes in the environment external to the image display medium. In a closed gap formed between a display substrate having an electrode and a back substrate disposed opposite to the display substrate and having an electrode, plural kinds of particle groups differing in color and charge characteristics and movable between the substrates by an electric field are sealed. The gap is given a proper amount of water vapor so that dew does not condense within a predetermined temperature range. Thus, favorable and stable display characteristics can be obtained.Type: GrantFiled: July 18, 2001Date of Patent: July 1, 2003Assignee: Fuji Xerox Co., Ltd.Inventors: Takeshi Matsunaga, Kiyoshi Shigehiro, Yoshiro Yamaguchi, Yoshinori Machida, Motohiko Sakamaki
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Patent number: 6574034Abstract: A method for displaying an image with an electrophoretic display device that includes a multiplicity of individual reservoirs, each containing an electrophoretic display fluid, located between two conductive film substrates, at least one of which is transparent, includes appropriately applying an electric field and a magnetic force to a selected individual reservoir in a manner to cause either a first set of particles or a second set of particles of the display fluid to be displayed. The first set of particles exhibit a color different from and contrasting to a color of the second set of particles, and also preferably a different charging property.Type: GrantFiled: January 16, 2002Date of Patent: June 3, 2003Assignee: Xerox CorporationInventors: Pinyen Lin, David H. Pan, Chieh-Min Cheng, Adam Bush