Electrochromic Elements Patents (Class 345/105)
  • Patent number: 7652812
    Abstract: A method of supplying an electrically controllable system having variable optical/energy properties in transmission or in reflection, including at least one carrier substrate with a multilayer that allows migration of active species, including at least two active layers separated by an electrolyte, the multilayer being placed between two electrodes connected respectively to upper and lower current leads respectively. In addition to a constant first energy potential, a time-varying second energy potential is applied between the current leads, the first and second energy potentials being designed to ensure switching between two states having different optical/energy properties in transmission or reflection.
    Type: Grant
    Filed: April 7, 2005
    Date of Patent: January 26, 2010
    Assignee: Saint-Gobain Glass France
    Inventors: Erwan Mahe, Fabien Beteille, Carinne Fleury, Emmanuel Valentin, Xavier Fanton
  • Patent number: 7649668
    Abstract: A transparent glazing, and a control method thereof, with a field of view that can be darkened over a portion of its surface by electrically controlling at least one functional element incorporated into a multilayer composite, the light transmission of which glazing can be varied reversibly. The functional element, for example a solid-state electrochromic multilayer system, includes at least one electrochromic functional layer enclosed between two surface electrodes. The surface electrodes and their leads are matched to one another and spaced spatially with respect to one another such that darkening starts at one edge of the functional element and, with a remaining voltage applied between the surface electrodes, propagates continuously over the surface of the functional element until it is completely and uniformly colored. The glazing can be used as an electrically controllable sunshield for windshields of vehicles or the like.
    Type: Grant
    Filed: February 3, 2005
    Date of Patent: January 19, 2010
    Assignee: Saint-Gobain Glass France
    Inventors: Xavier Fanton, Laurent Claude, Samuel Dubrenat, Juergen Schuett
  • Patent number: 7646525
    Abstract: An electro-wetting display panel including a first substrate, an insulator layer, a second substrate, partitioning structures, and electro-wetting display mediums. The first substrate has a plurality of first electrodes. The insulator layer is disposed on the first substrate to cover the first electrodes. The second substrate located above the first substrate and has a plurality of second electrodes. The partitioning structures are disposed on the insulator layer and each defines a pixel region, respectively. At least one of the partitioning structures has a flow channel surrounding the pixel regions, and the flow channel is connected to one of the pixel regions correspondingly. The electro-wetting display mediums are disposed within the pixel regions and the flow channels. When the electro-wetting display mediums are driven by the electric charge between the first electrodes and the second electrodes, the electro-wetting display mediums move between the pixel regions and the flow channels.
    Type: Grant
    Filed: May 14, 2008
    Date of Patent: January 12, 2010
    Assignee: Industrial Technology Research Institute
    Inventors: Chao-Kai Cheng, Wan-Wen Chiu, Wei-Yuan Cheng, Chung-Wei Wang, Jhih-Ping Lu
  • Patent number: 7646526
    Abstract: One exemplary embodiment of an electrochromic thin-film material comprises an alloy of antimony and one or more base metals; and/or an alloy of antimony, one or more base metals, and lithium; and/or an alloy of antimony, one or more base metals, lithium, and one or more noble metals. Another exemplary embodiment of an electrochromic thin-film material comprises a multilayer stack, the multilayer stack comprising at least one layer comprising one of antimony, antimony-lithium alloy, antimony-one or more base metals alloy, antimony-one or more base metals-lithium alloy, antimony-one or more base metals-one or more noble metals alloy, and antimony-one or more base metals-one or more noble metals-lithium alloy; and at least one alternating layer comprising one of a base metal and a base-metal alloy. One or more of the base metals comprise Co, Mn, Ni, Fe, Zn, Ti, V, Cr, Zr, Nb, Mo, Hf, Ta, W, Cd, Mg, Al, Ga, In, Sn, Pb, and Bi, and alloys thereof.
    Type: Grant
    Filed: September 30, 2008
    Date of Patent: January 12, 2010
    Assignee: Soladigm, Inc.
    Inventors: Zhongchun Wang, Paul P. Nguyen
  • Patent number: 7639415
    Abstract: Disclosed are an electrochromic device and a method for fabricating the same. The electrochromic device comprises a transparent electrode, on which an electrochromic layer is formed, a counter electrode on which a reflective layer is formed, and an electrolyte layer interposed between the transparent electrode and the counter electrode. Since the electrolyte layer is formed in only an active region of unit pixels, neither crosstalk nor image diffusion occurs and only the selected region of unit pixels is operated. Thus, the electrochromic device can realize passive matrix displays capable of representing a desired color. Furthermore, the electrochromic device can be utilized in a variety of applications including flexible displays and electrical papers.
    Type: Grant
    Filed: October 31, 2007
    Date of Patent: December 29, 2009
    Assignee: Samsung Electronics Co., Ltd.
    Inventors: Jae Eun Jung, Jae Eun Jang, Chang Ho Noh
  • Patent number: 7609434
    Abstract: Disclosed is a method for manufacturing an electrode of an electrochromic display. The method includes, prior to forming a porous nanoelectrode, forming a barrier rib for separating an electrolyte using a photosensitive paste as a material for the barrier rib, in which the photosensitive paste enables formation of patterns through a photolithographic process and maintains its shape at 450° C. to 500° C. The use of the electrode enables fabrication of an electrochromic display that is capable of preventing cross-talk between pixels and has advantages of fast response speed, prolonged lifespan upon repeated use and improved electrochromism, when compared to the case of metal oxide electrodes.
    Type: Grant
    Filed: October 17, 2007
    Date of Patent: October 27, 2009
    Assignee: Samsung Electronics Co., Ltd.
    Inventors: Hong Shik Shim, In Seo Kee, Ick Hwan Ko, Young Gu Lee
  • Publication number: 20090225022
    Abstract: A method and device for providing a display having increased viewability are provided. The display assembly includes a backlight layer, an electrochromic layer formed over the backlight layer, a surface layer formed over the electrochromic layer and including at least one substantially translucent graphical element thereon, and a power supply. The electrochromic layer is switchable between a substantially transparent state and a substantially reflective state upon application of a switching voltage from the power supply, where the state being selected is based on a lighting condition of the display assembly.
    Type: Application
    Filed: March 5, 2008
    Publication date: September 10, 2009
    Applicant: SONY ERICSSON MOBILE COMMUNICATIONS AB
    Inventor: William H. TOLBERT
  • Patent number: 7586663
    Abstract: An electrochromic cell is disclosed which can include a first electrically conducting transparent electrode bonded to an electrochemically formed first electrochromic electrode on the surface of the electrode; a second electrically conducting transparent electrode bonded to an electrochemically formed second electrochromic electrode on the surface of the second electrode and a transparent gel polymer electrolyte formed from one or more macromomoners mixed with a plasticizer and an electrolyte salt, the gel polymer electrolyte in contact with both the first and second electrochromic electrodes; the first and second electrochromic electrodes are separated from each other.
    Type: Grant
    Filed: March 1, 2006
    Date of Patent: September 8, 2009
    Assignee: Triton Systems, Inc.
    Inventors: Bijan Radmard, Gregory A. Sotzing
  • Patent number: 7586664
    Abstract: An electrochromic switchable transparency, e.g. a window and/or a mirror includes an electrochromic switchable medium between a pair of electrode assemblies. At least one of the electrode assemblies is transparent to visible light and includes an electrode over a surface. In one nonlimiting embodiment of the invention, the electrode has two electrically conducting layers and a bridging layer between and interconnecting the two electrically conducting layers. In one nonlimiting embodiment, the bridging layer includes a high electrically resistance connecting layer to provide the electrode with a heating layer to heat the surface and/or a current conducting layer to pass current to the medium. In another nonlimiting embodiment, the bridging layer includes an electrically connecting layer to pass current to electrically enhance the first electrically conductive layer.
    Type: Grant
    Filed: June 22, 2006
    Date of Patent: September 8, 2009
    Assignee: PPG Industries Ohio, Inc.
    Inventor: Dennis J. O'Shaughnessy
  • Patent number: 7586667
    Abstract: A solid-state electronic electrochromic device (ECD) operates electronically rather than relying on the ionic motion that is common in electrochromic devices. The electronic ECD has at least one active layer sandwiched between two electrodes. The active layer is made of mixed metal oxides and may be made of a mixture of tungsten and praseodymium oxides. The electronic ECD may have only a single active layer, or may have multiple layers that have the same composition and that are separated by thin transparent metal films. Some versions of the electronic ECD incorporate a distribution of small metal particles within the active layer.
    Type: Grant
    Filed: August 21, 2007
    Date of Patent: September 8, 2009
    Assignee: Eclipse Energy Systems, Inc.
    Inventor: Hulya Demiryont
  • Patent number: 7535614
    Abstract: An electrical window control system and method thereof are provided, wherein the system includes a variable transmission window having first and second substantially transparent substrates that define an area, and a variable transmittance material that occupies at least a portion of the area. The system further includes a power source that supplies an electrical power, at least one light source that emits light towards the variable transmission window, and at least one sensor in optical communication with the light source, wherein the at least one sensor receives at least a portion of the light that propagates through at least one of the first and second substantially transparent substrates, and communicates a signal that corresponds to the received light.
    Type: Grant
    Filed: May 27, 2008
    Date of Patent: May 19, 2009
    Assignee: Gentex Corporation
    Inventors: Donald L. Tapley, Robert R. Turnbull
  • Patent number: 7492339
    Abstract: A bistable electro-optic display having at least one pixel is driven using a waveform V(t) such that: J = ? 0 T ? V ? ( t ) ? M ? ( T - t ) ? ? t (where T is the length of the waveform, the integral is over the duration of the waveform, V(t) is the waveform voltage as a function of time t, and M(t) is a memory function that characterizes the reduction in efficacy of the remnant voltage to induce dwell-time-dependence arising from a short pulse at time zero) is less than about 1 volt sec.
    Type: Grant
    Filed: March 15, 2005
    Date of Patent: February 17, 2009
    Assignee: E Ink Corporation
    Inventor: Karl R. Amundson
  • Patent number: 7483014
    Abstract: A method of driving a display apparatus with which unevenness of image is precluded and the time for display is shortened. A display apparatus for displaying an image by impressing a voltage on pixels by row electrodes and column electrodes disposed in a matrix, for example, a metal deposition type electrochemical display apparatus. A voltage not less than a threshold voltage Vth is selectively impressed on predetermined pixels by superposing an address pulse voltage Vadress-row for the row electrodes and an address voltage Vadress-col for the column electrodes on each other to thereby perform address driving, and a data sustaining pulse voltage Vsus is impressed on the row electrodes immediately after the address pulse voltage Vadress-row. The data sustaining pulse voltage Vsus satisfies the condition of the following formula: Vsus+Vadress-col<Vth??(1).
    Type: Grant
    Filed: May 16, 2003
    Date of Patent: January 27, 2009
    Assignee: Sony Corporation
    Inventors: Masanobu Tanaka, Ryota Odake, Kenichi Takahashi
  • Publication number: 20090021472
    Abstract: A reflection type display apparatus has, at the least, a first mode, for performing a first electroplating of an electrode 2 for a first color; a second mode, for performing second electroplating of a second electrode 4 for a second color, to remove the first electroplating from the electrode 2; and a third mode for performing a third electroplating of a electrode 5, to remove the first and the second electroplating from the electrodes 2 and 4. Through this processing, the reflection type display apparatus can present a color display, and can provide a high reflectance for displaying the color white.
    Type: Application
    Filed: July 10, 2008
    Publication date: January 22, 2009
    Applicant: CANON KABUSHIKI KAISHA
    Inventor: Hajime Ikeda
  • Publication number: 20080309612
    Abstract: Electronic Paper Displays can suffer from “ghosting” or previous images remaining partially visible after the display has updated to show a new image. A pseudo-random noise intermediate image is used to make the ghosting less visible to human observers. Further, other intermediate images can be used to convey visible information or to convey secret information, e.g. a watermark. A control signal for driving the bi-stable display from the current optical state to an intermediate state, then to a final optical state is also determined. In some embodiments, the intermediate state for each pixel is determined in a pseudo-random manner. The pseudo-random noise values are applied to the bi-stable display to remove noise and other artifacts from the end resulting images. The determined control signal is applied to the bi-stable display to drive the bi-stable to the intermediate state, then to the final optical state.
    Type: Application
    Filed: March 31, 2008
    Publication date: December 18, 2008
    Applicant: Ricoh Co., Ltd.
    Inventors: Michael J. Gormish, Guotong Feng
  • Publication number: 20080309551
    Abstract: A remotely-alterable electronic-ink based display device for displaying graphical indicia within a GPS system transmitting a plurality of GPS signals to the device display device. The device employs an addressable display assembly including a layer of electronic ink including a bi-stable non-volatile imaging material. The device includes an integrated circuit structure having a GPS signal receiver, a storage element for storing instructions, programs and data, and a programmed processor in electrical communication with the addressable display assembly and an antenna structure. A signal transmitting structure transmits signals from the antenna structure to the remote activator module. A signal receiving structure receives electromagnetic signals from the remote activator module, using the antenna structure. An on-board battery power structure, operably connected to the integrated circuit structure, supplies electrical power the integrated circuit structure.
    Type: Application
    Filed: May 23, 2008
    Publication date: December 18, 2008
    Inventor: Alexander Gelbman
  • Patent number: 7463226
    Abstract: A display device according to this invention includes: a display panel (2) having plural pixels configured to display image information; plural driver circuits (10) configured to drive the plural pixels according to a video signal indicative of the image information which is inputted externally, the video signal being a radio signal; and plural wireless input portions (22) each configured to obtain a part of the video signal from the radio signal, wherein the plural driver circuits (10) are each configured to drive a part of the plural pixels according to the part of the video signal obtained by a respective one of the wireless input portions (22).
    Type: Grant
    Filed: April 20, 2004
    Date of Patent: December 9, 2008
    Assignee: Panasonic Corporation
    Inventor: Naohide Wakita
  • Patent number: 7457027
    Abstract: This invention discloses methods to dispense adhesives for fabricating electrooptic devices. In addition the invention also discloses on how the cavities of these electrooptic devices may be filled using detachable tabs. The Electrooptic devices of this invention may comprise liquid or solid electrolytes.
    Type: Grant
    Filed: July 20, 2005
    Date of Patent: November 25, 2008
    Assignee: ElectroChromix, Inc.
    Inventors: Robert S. LeCompte, Juan Carlos Lopez Tonazzi
  • Patent number: 7453435
    Abstract: Electrochromic matrix and method of controlling the grey state of pixels in an electrochromic matrix display comprising a first set of electrodes being formed of electrically isolated conduction lines, a second set of electrodes being formed of electrically isolated conduction lines, an electrochromic material and an electrolyte being arranged between or on said first and second sets of electrodes and drive means arranged to supply drive voltages selectively to individual electrodes in said first and second sets of electrodes, said first and second sets of electrodes being arranged in a pattern such that each electrode in said first set intersect each electrode in said second set at a single location and such that electrode in said second set intersect each electrode in said first set at a single location, said intersections between the first and second sets of electrodes forming a set of pixels.
    Type: Grant
    Filed: February 24, 2004
    Date of Patent: November 18, 2008
    Assignee: Edwards Science & Technology
    Inventor: Marten Edwards
  • Patent number: 7443566
    Abstract: A method and apparatus for modifying an appearance of a mobile terminal are provided. A mobile terminal housing is provided with a window. A first electrode is formed inside the window. A conductive polymer layer is formed over the first electrode. An electrolyte layer is formed over the conductive polymer layer. An ion storage layer is formed in contact with the electrolyte layer. A second electrode is formed in contact with the ion storage layer. A power supply is provided for supplying a voltage to the first electrode and the second electrode, where a state of the conductive polymer layer changes from a first uncolored state to a second colored state upon application of the voltage and where the changing of the state of the conductive polymer layer modifies a visual appearance of the housing.
    Type: Grant
    Filed: March 10, 2006
    Date of Patent: October 28, 2008
    Assignee: Sony Ericsson Mobile Communications AB
    Inventors: Jacob Lerenius, Håkan Carlberg
  • Patent number: 7441134
    Abstract: An electronic device of an embodiment of the invention is disclosed that at least partially displays a pixel of a display image. The device includes a first reflector and a second reflector defining an optical cavity therebetween that is selective of a visible wavelength at an intensity. The device includes a mechanism to allow optical properties of the cavity to be varied such that the visible wavelength and/or the intensity are variably selectable in correspondence with the pixel of the displayable image. The device also includes one or more transparent deposited films, one or more absorbing layers, an integral micro-lens, and/or one or more anti-stiction bumps. The deposited films are over one of the reflectors, for self-packaging of the device. The absorbing layers are over one of the reflectors, to reduce undesired reflections. The integral micro-lens is over one of the reflectors, and the anti-stiction bumps are between the reflectors.
    Type: Grant
    Filed: September 20, 2006
    Date of Patent: October 21, 2008
    Inventors: Arthur Piehl, James R. Przybyla, Adam L Ghozeil, Eric T. Martin
  • Patent number: 7436389
    Abstract: A method and system for controlling a color of light output by a diffractive light device (DLD device). The color is determined by a gap voltage applied to the DLD device. During each of a number of time frames, one of a number of control bits in a control word is sent to bit line logic corresponding to the DLD device. Each of the control bits represents a gap voltage level. The applied gap voltage is then adjusted to the gap voltage level represented by the one of the number of the control bits.
    Type: Grant
    Filed: July 29, 2004
    Date of Patent: October 14, 2008
    Inventor: Eugene J Mar
  • Patent number: 7433114
    Abstract: The present invention relates to a microcapsule that can be used to form a rewritable medium for visual displays that are stable in the presence of electric fields having a strength that is typical in the work environment. The microcapsule of the invention comprises charged particles of one or more colors that are suspended in a phase change material that has a melting temperature in the range of between about 30° C. and about 200° C. The microcapsules can be used to form an electrophoretic coating that includes microcapsules of the invention distributed throughout a polymer matrix. The electrophoretic coating can be used to coat a substrate to form a rewritable medium.
    Type: Grant
    Filed: January 17, 2007
    Date of Patent: October 7, 2008
    Inventors: Andrew L. Van Brocklin, William Dorogy
  • Publication number: 20080238871
    Abstract: A display apparatus includes a plurality of scanning lines and data lines and, at each intersection of said data lines and scanning lines, an electrochromic pixel element and a sensor element connected to the pixel element. The sensor element is sensitive to a user's graphical input, which changes a charge state of the respective pixel element. The display apparatus also includes a control means, which is configured to allow the pixel element to be selectively set to a first charge state corresponding to a first display state, or to a second charge state corresponding to a second display state. The second display state reflects the user's graphical input. The second charge state of the pixels may be brought about by exposing the sensor elements to light from a light pen or to a magnetic field from a magnetic pen, the pen being drawn across the display screen of the apparatus.
    Type: Application
    Filed: March 28, 2008
    Publication date: October 2, 2008
    Applicant: SEIKO EPSON CORPORATION
    Inventor: Simon Tam
  • Patent number: 7420727
    Abstract: The present invention is an active matrix electrochromic display architecture where the active components are placed on the backplane of the display, thereby maximizing the viewable pixel area. The cathode of the electrochromic pixel is placed on top of the active components, with respect to the viewer, thereby allowing the active components to be as large as desired while not interfering with the viewable area of the pixel.
    Type: Grant
    Filed: September 28, 2006
    Date of Patent: September 2, 2008
    Assignee: NTERA Limited
    Inventor: Micheal Cassidy
  • Patent number: 7414770
    Abstract: An electrochromic device including a first substantially transparent substrate having an electrically conductive material associated therewith; a second substrate having an electrically conductive material associated therewith; an electrochromic medium contained within a chamber positioned between the first and second substrates which includes at least one solvent, at least one anodic material, and at least one cathodic material, wherein the first and second substrates are substantially uniformly spaced apart by a spacing member comprising a non-polymeric material which substantially dissolves upon association with the at least one solvent.
    Type: Grant
    Filed: May 3, 2006
    Date of Patent: August 19, 2008
    Assignee: Gentex Corporation
    Inventors: Kevin L. Ash, Leroy J. Kloeppner, Steven J. Veenman, Michelle M. Carroll
  • Patent number: 7403319
    Abstract: An electrochromic device in which specific channel direction for the conduction of ions is implemented. As a result ionic crosstalk between display pixels is greatly reduced and unwanted transient coloration effects are minimized. Further, specific gel, polymer, or ionic liquid solutions can greatly eliminate the corrosive effects associated with the use of electrolyte salt solutions.
    Type: Grant
    Filed: January 12, 2007
    Date of Patent: July 22, 2008
    Assignee: NTERA Limited
    Inventors: Nigel Leyland, David Corr, Micheal Cassidy, Francois Pichot, Nikolaos Vlachopoulos, Michael Ryan
  • Patent number: 7375871
    Abstract: A light control system having a full range of dimming for smart-glass by providing an interface between an off-the-shelf dimmer and a electrochromic glass device is disclosed herein. The light control system or electrochromic glass control device acts as an interface that converts an asymmetric alternating current (AC) power signal from the dimmer device into a symmetric, amplitude controlled AC output signal for controlling the tint of the smart-glass device. The electrochromic glass control device includes a powerline interface circuit that receives the asymmetric AC power signal from the dimmer. A controller connects to the powerline interface circuit to generate a control signal responsive to the asymmetric AC power signal. Connecting between the dimmer and the controller, an output stage generates the symmetrical AC output signal responsive to the control signal to control the electrochromic glass device.
    Type: Grant
    Filed: October 27, 2005
    Date of Patent: May 20, 2008
    Assignee: Leviton Manufacturing Co., Inc.
    Inventors: John Libretto, Michael Ostrovsky, Eugene Frid, Edward Uftring
  • Patent number: 7352500
    Abstract: A display device comprising a plurality of independently addressable pixels (1) comprising: a first substrate (2); a counter-electrode (3); second substrate (4); a stack of electrochromic layers (5a, 5b, 5c) associated with said second substrate (4); an electrolyte (6) disposed between said counter-electrode (3) and said stack of electrochromic layers (5a, 5b, 5c). Said electrochromic layers (5a, 5b, 5c) are each independently addressable for switching operation; and separated from each other by layers of an electrolyte (7).
    Type: Grant
    Filed: July 1, 2003
    Date of Patent: April 1, 2008
    Assignee: Koninklijke Philips Electronics, N.V.
    Inventors: Hendrik Johannes Boudewijn Jagt, Nicolaas Petrus Willard, Mark Thomas Johnson
  • Patent number: 7348966
    Abstract: A digital resistive-type touch panel includes first and second transparent substrates opposing each other; a plurality of first transparent electrodes extending along a surface of the first transparent substrate; a plurality of second transparent electrodes extending along a surface of the second transparent substrate, wherein the first and second transparent electrodes cross each other; a first signal line for dividing an applied voltage and applying unique voltages to respective ones of the first transparent electrodes; and a plurality of second signal lines connected to respective ones of the plurality of second transparent electrodes.
    Type: Grant
    Filed: November 12, 2003
    Date of Patent: March 25, 2008
    Assignee: LG.Philips LCD Co., Ltd.
    Inventors: Hee Jung Hong, Hee Jeong Park
  • Patent number: 7336410
    Abstract: A display of an electrochromic type, including an active matrix substrate on which a plurality of pixel electrodes corresponding to pixels are arranged in a matrix form; a counter substrate which is provided with a transparent electrode that is common with respect to a plurality of the pixel electrodes; and an electrochromic material which is sandwiched between the active matrix substrate and the counter substrate, and is colored in a boundary either between itself and the pixel electrode or between itself and the transparent electrode; wherein the pixel electrode other than an electrode-exposed part which contacts with the electrochromic material is covered with a transparent protective film; and the electrode-exposed part has a different area from the area of the part onto which a current generated between the transparent electrode and the pixel electrode concentrates, out of the transparent electrode.
    Type: Grant
    Filed: July 3, 2006
    Date of Patent: February 26, 2008
    Assignee: Hitachi Displays, Ltd.
    Inventors: Shoichi Hirota, Tetsuya Ohshima, Tatsuya Sugita
  • Patent number: 7324259
    Abstract: A display element comprising a pair of electrodes having therebetween an electrolyte layer containing silver or a silver-containing compound, the display element being driven by the pair of electrodes so as to electrochemically dissolve silver or to electrochemically deposit silver, wherein the electrolyte layer contains an antioxidant selected from the group consisting of a phenolic antioxidant, a phosphoric acid antioxidant, a sulfur-containing antioxidant, an amine antioxidant and a hydroquinone derivative.
    Type: Grant
    Filed: March 11, 2005
    Date of Patent: January 29, 2008
    Assignee: Konica Minolta Holdings, Inc.
    Inventors: Noriyuki Kokeguchi, Satoru Ikesu
  • Patent number: 7312914
    Abstract: Between each transparent pixel electrode driven by TFT as a drive device and a common electrode, a polymer layer located in contact with the transparent pixel electrode and electrically active to change in color by electrochemical oxidization or reduction and a polymeric solid electrolytic layer located in contact with the polymer layer and containing a coloring agent are interposed. Since electrochemical oxidization or reduction brings about a color change, the contrast and the black concentration can be enhanced, and bronzing after long-time use does not occur.
    Type: Grant
    Filed: September 30, 2005
    Date of Patent: December 25, 2007
    Assignees: Sony Corporation, Sony International (Europe) GmbH
    Inventors: Kenji Shinozaki, Akio Yasuda, Kazuhiro Noda, Toru Udaka, Mieko Kuwahara
  • Patent number: 7312784
    Abstract: A first apparatus for displaying drawings comprises a housing having an aperture, a drawing sheet comprising electro-optic material movable through the aperture between closed and open positions, and a writing device for writing on the sheet as it moved between its closed and open positions. A second apparatus comprises a display member having a viewing surface, support means for supporting this display member above a floor, an electro-optic medium disposed on the display member, and a movable writing head for writing on the electro-optic medium. Another display comprises an optic medium with two display states visible through a viewing surface. A touch screen is disposed on the opposed side of the optic medium from the viewing surface, and the optic medium is deformable such that pressure applied to the viewing surface will be transmitted to the touch screen.
    Type: Grant
    Filed: December 22, 2005
    Date of Patent: December 25, 2007
    Assignee: E Ink Corporation
    Inventors: Allan Scott Baucom, Ara N. Knaian, Heather A. Linden, Timothy J. O'Malley, Russell J. Wilcox
  • Patent number: 7310080
    Abstract: Methods and related devices for manipulating ambient light and various light sources for applications including colour displays, screen displays and colored coverings for a multitude of items is disclosed. Methods and related devices for manipulating light for decorative, signaling and other purposes are also disclosed.
    Type: Grant
    Filed: May 16, 2005
    Date of Patent: December 18, 2007
    Inventor: Richard V. Jessop
  • Patent number: 7289101
    Abstract: A color electrophoretic display including a plurality of cells each containing electrophoretic particles. Each of the cells in the plurality is capable of displaying at least one of three selected primary colors, when the particles in the cell are moved from a first rest position to a second display position on the cell. An electrode is coupled to each of the cells and is operative when biased to move the particles from the first rest position to the second display position thereby displaying primary colors in the second display position and causing the display to provide full color capability according to particle position in the cells.
    Type: Grant
    Filed: August 17, 2000
    Date of Patent: October 30, 2007
    Assignee: Copytele, Inc.
    Inventors: Frank J. DiSanto, Denis A. Krusos, Wei-Hsin Hou
  • Patent number: 7268777
    Abstract: There is disclosed an electrooptical device capable of achieving a large area display by making full use of the size of the substrate. An active matrix substrate acts as a driver portion for the reflection-type electrooptical device. A pixel matrix circuit and logic circuitry are formed on the active matrix substrate. At this time, the logic circuitry is disposed, by making use of a dead space in the pixel matrix circuit. The area occupied by the pixel matrix circuit, or image display region, can be enlarged without being limited by the area occupied by the logic circuitry.
    Type: Grant
    Filed: July 15, 2004
    Date of Patent: September 11, 2007
    Assignee: Semiconductor Energy Laboratory Co., Ltd.
    Inventors: Shunpei Yamazaki, Jun Koyama, Takeshi Fukunaga
  • Patent number: 7236364
    Abstract: A case for a portable terminal using a color liquid crystal uses a Peltier device to vary the color of the case by means of electrical heating and cooling the interior of the case. The case includes a temperature control apparatus for emitting electrical heat, when an electrical current is applied thereto, and simultaneously cooling the opposite side; a liquid crystal application agent positioned on the upper portion of the temperature control apparatus and adapted to vary the color by means of the electrical heat; and a cooling unit positioned opposite to an upper portion of the temperature control apparatus to cool heat-generating devices inside the terminal.
    Type: Grant
    Filed: June 22, 2005
    Date of Patent: June 26, 2007
    Assignee: Samsung Electronics Co., Ltd.
    Inventor: Sang-Min Lee
  • Patent number: 7215318
    Abstract: A drive control circuit for controlling an electrochromic element is substantially integrated into an integrated circuit, with the exception of resistive elements for dissipating heat away from the integrated circuit. The drive control circuit includes a current regulator for generating a select one of at least two discrete amounts of current to drive the electrochromic element. Further, a control system individually controls a plurality of electrochromic elements and includes shunts coupled in parallel with the individual electrochromic elements. The control system controls the ratio of the reflectance of the individual electrochromic elements as a function of sensed glare.
    Type: Grant
    Filed: June 24, 2002
    Date of Patent: May 8, 2007
    Assignee: Gentex Corporation
    Inventors: Robert R. Turnbull, David J. Schmidt
  • Patent number: 7184199
    Abstract: The present invention relates to a microcapsule that can be used to form a rewritable medium for visual displays that are stable in the presence of electric fields having a strength that is typical in the work environment. The microcapsule of the invention comprises charged particles of one or more colors that are suspended in a phase change material that has a melting temperature in the range of between about 30° C. and about 200° C. The microcapsules can be used to form an electrophoretic coating that includes microcapsules of the invention distributed throughout a polymer matrix. The electrophoretic coating can be used to coat a substrate to form a rewritable medium.
    Type: Grant
    Filed: September 21, 2005
    Date of Patent: February 27, 2007
    Assignee: Hewlett-Packard Development Company, L.P.
    Inventors: Andrew L. Van Brocklin, William Dorogy
  • Patent number: 7177064
    Abstract: Disclosed is a display device using a printed circuit board (PCB) as a substrate of a display panel. The display device includes the PCB formed with a via hole, a display panel having an electrode aligned adjacent to one side of the via hole formed in the PCB in order to apply an electric signal to a pixel or a segment, a driving circuit section for applying an electric signal to the display panel, and a wiring section for electrically connecting the electrode of the display panel to the driving circuit section through the via hole. The electric signal of the driving circuit is directly applied to the lower electrode through the via hole of the PCB, so the length of the electrode line used for wiring can be significantly reduced, thereby improving the response speed of the display device.
    Type: Grant
    Filed: June 6, 2005
    Date of Patent: February 13, 2007
    Assignee: LG Chem, Ltd.
    Inventor: Kee Yong Park
  • Patent number: 7142190
    Abstract: A wireless communication handset (100), or other electrical device, having a housing disposed about electrical communications circuitry. At least a portion of the housing, for example a bezel (144) or keypad area (148) comprising a variable input responsive variable appearance portion, for example an electro-chromic material. A user operable control circuit coupled to the electro-chromic material portion of the housing, whereby a color of the electro-chromic material portion of the housing is variable by the color control circuit.
    Type: Grant
    Filed: February 28, 2002
    Date of Patent: November 28, 2006
    Assignee: Motorola, Inc.
    Inventor: Nelson F. Martinez
  • Patent number: 7130101
    Abstract: A method for providing preferential coloring to a portion of an electrochromic window assembly, includes the steps of providing an electrochromic window assembly comprising first and second spaced apart transparent substrates defining a chamber therebetween, the first transparent substrate having a first conductive coating and the second transparent substrate having a second conductive coating, the chamber containing an electrochromic medium capable of coloring upon application of electrical potential thereto to provide reduced luminous transmittance; electrically connecting a plurality of first spaced facilities to the first conductive coating for providing the electrical potential to the first conductive coating; electrically connecting a plurality of second spaced facilities to the second conductive coating for providing the electrical potential to the second conductive coating; and applying an electrical current to selected ones of the plurality of first spaced facilities and to selected ones of the plura
    Type: Grant
    Filed: October 8, 2002
    Date of Patent: October 31, 2006
    Assignee: PPG Industries Ohio, Inc.
    Inventors: Thomas G. Rukavina, Chia-Cheng Lin
  • Patent number: 7116309
    Abstract: A photowriting display device which is capable of performing bright full color display and a photowriting display apparatus which incorporates the photowriting display device and on which the pen moving operation is directly reflected as information to be displayed. A photowriting display device is disclosed which incorporates: an electrochromic display member incorporating a photoconductor in which only regions irradiated with writing light generate carriers to realize conductivity; an electrochromic layer in which light absorption of the regions are reversibly changed owing to electrochemical oxidation and reduction reactions caused to occur due to the conductivity; an electrolyte in which the electrochromic layers are laminated or an electrochromic material is dissolved; and a pair of electrodes laminated through the photoconductor, the electrochromic layer and the electrolyte. A plurality of the electrochromic display members are laminated.
    Type: Grant
    Filed: April 6, 2000
    Date of Patent: October 3, 2006
    Assignee: Fuji Photo Film Co., Ltd.
    Inventors: Koichi Kimura, Mitsuru Sawano
  • Patent number: 7113165
    Abstract: A molecular light valve controlled color display. The display is formed through a layer of such molecules between a crossbar array of transparent electrodes, the crossbar intersections forming addressable pixels. A rapid sequencing of primary colors is controlled by molecular light valves congruent with display pixels. Native display resolution for a full gamut of colors is maintained for each pixel via a temporally distributed color pixel scheme. Both still and motion images can be displayed. Molecular valves, or switches, transition between two optically distinct states, e.g., transparent and black.
    Type: Grant
    Filed: October 25, 2002
    Date of Patent: September 26, 2006
    Assignee: Hewlett-Packard Development Company, L.P.
    Inventors: Kent D. Vincent, Xiao-An Zhang, R. Stanley Williams
  • Patent number: 7095404
    Abstract: An electronic writing instrument for rewritable electronic writing surfaces. A self-powered, untethered, pencil-like instrument uses a perpendicular fringe field for changing the orientation of pixels composed of bistable, bichromal colorant elements. An appendix hereto describes bistable, bichromal, molecular colorant.
    Type: Grant
    Filed: September 25, 2003
    Date of Patent: August 22, 2006
    Assignee: Hewlett-Packard Development Company, L.P.
    Inventors: Kent D. Vincent, R. Stanley Williams, Xiao-An Zhang
  • Patent number: 7084853
    Abstract: An electrochemical display apparatus in which simple matrix driving is realized, whereby apparatus constitution can be simplified, and the price of the apparatus can be lowered. The electrochemical display apparatus performs display by use of electrochemical deposition/dissolution of a metal. The display apparatus is driven by a simple matrix driving system, in which a deposition overvoltage at the time of deposition of metallic ions as the metal is used as a threshold in the simple matrix driving. A driving voltage is set to be not more than two times the deposition overvoltage. The electrochemical display apparatus includes transparent electrodes and counter electrodes, the display is performed by utilizing deposition/dissolution of the metal on the transparent electrodes, and the potential difference between the metal to be deposited on the transparent electrodes and the counter electrodes is set to be less than the deposition overvoltage.
    Type: Grant
    Filed: November 7, 2002
    Date of Patent: August 1, 2006
    Assignee: Sony Corporation
    Inventors: Kenji Shinozaki, Takeshi Matsui, Kenichi Takahashi
  • Patent number: 7050039
    Abstract: An electronic business card has a memory storing presentation slide images, a display that displays the images, and a processing device that governs the display process. The card has input devices (pads or buttons such as FORWARD, BACK and INDEX) allowing the user to control the display. The display's picture elements are preferably implemented as multi-chromic beads whose respective physical orientations are controlled by the processing device so as to form the viewed image. A method requires a target audience member to view at least one “payload” image (information that a presenter desires to propagate among a target audience), in association with at least one “hook” image (a quiz or game), on an electronic business card, PDA, or PC. The method includes presenting the payload image in association with the hook image, receiving and analyzing a user response, and displaying a reward image if the user response satisfies a criterion.
    Type: Grant
    Filed: June 4, 2001
    Date of Patent: May 23, 2006
    Assignee: Xilinx, Inc.
    Inventors: Ciaran McGloin, Reto Stamm
  • Patent number: 7033655
    Abstract: The present invention relates to a laminated glazing which has first and second substrates with peripheral edges, an active system disposed between the substrates, and at least two peripheral seals that run contiguously from the first and second substrates.
    Type: Grant
    Filed: October 17, 2001
    Date of Patent: April 25, 2006
    Assignee: Saint-Gobain Glass France
    Inventors: Fabien Beteille, Jean-Christophe Giron
  • Patent number: 7034783
    Abstract: An electro-optic display comprises a bistable electro-optic medium, a plurality of pixel electrodes, with associated non-linear elements, and a common electrode, disposed on opposed sides of the electro-optic medium. The display has a writing mode, in which at least two different voltages are applied to different pixel electrodes, and a non-writing mode in which the voltages applied to the pixel electrodes are controlled so that any image previously written on the electro-optic medium is substantially maintained. The display is arranged to apply to the common electrode a first voltage when the display is in its writing mode and a second voltage, different from the first voltage, when the display is in its non-writing mode.
    Type: Grant
    Filed: August 19, 2004
    Date of Patent: April 25, 2006
    Assignee: E Ink Corporation
    Inventors: Holly G. Gates, Karl R. Amundson