Patents Assigned to E Ink Corporation
  • Patent number: 11221685
    Abstract: A magneto-electrophoretic medium that can be globally and locally addressed and erased. The medium provides a writeable display with no perceivable lag and the ability to write and erase with only minimal power requirements. In particular, the magneto-electrophoretic medium can be erased by providing a subthreshold electric stimulus and supplementing a second non-electric stimulus that disturbs the written state and allows the magneto-electrophoretic particles to return to their original state.
    Type: Grant
    Filed: December 19, 2019
    Date of Patent: January 11, 2022
    Assignee: E Ink Corporation
    Inventors: Crystal Nguyen, Evan Griffith, Seth J. Bishop, Stephen J. Telfer, Kosta Ladavac, Andrew A. Drabek, Sunil Krishna Sainis, Richard J. Paolini, Jr., Samantha Morrill
  • Patent number: 11195481
    Abstract: An electrophoretic display comprising a fluid including a first species of particles and a charge control agent disposed between first and second electrodes. When a first addressing impulse have an electrical polarity is applied to the medium, the first species of particles move in one direction relative to the electric field, but when a second addressing impulse, larger than the first addressing impulse but having the same electrical polarity, is applied to the medium, the first species of particles move in the opposed direction relative to the electric field.
    Type: Grant
    Filed: September 27, 2019
    Date of Patent: December 7, 2021
    Assignee: E Ink Corporation
    Inventors: Stephen J. Telfer, Stephen Bull, Alain Bouchard, Craig A. Herb, Kosta Ladavac, Ana L. Lattes, Jennifer M. Morrison, Richard J. Paolini, Jr., Michael Thomas Regan, Luke M. Slominski, Lee Yezek, Kenneth R. Crounse, J. Ryan Kruse, Christopher L. Hoogeboom, Jason D. Feick, David Darrell Miller
  • Patent number: 11195480
    Abstract: There are provided display controllers and driving methods related to those described in US Published Patent Application No. 2013/0194250.
    Type: Grant
    Filed: November 7, 2017
    Date of Patent: December 7, 2021
    Assignee: E Ink Corporation
    Inventors: Pierre-Yves Emelie, Kenneth R. Crounse, Karl Raymond Amundson
  • Patent number: 11194218
    Abstract: A first substrate includes: a first base material including an insulating layer; and a partition wall disposed on the insulating layer. The insulating layer and the partition wall are formed of a resin material. The partition wall has a higher hardness than the insulating layer. A protective film that protects the insulating layer is disposed on a surface of the insulating layer. A portion of the protective film is located between the partition wall and the insulating layer.
    Type: Grant
    Filed: March 23, 2020
    Date of Patent: December 7, 2021
    Assignee: E Ink Corporation
    Inventor: Takashi Miyata
  • Patent number: 11175561
    Abstract: The present disclosure provides an electrophoretic display medium. The display medium can include a substrate, an electrophoretic layer, and a network electrode. The electrophoretic layer is disposed adjacent the top surface of the substrate. The electrophoretic layer includes a plurality of microcapsules containing an internal phase in a binder. A bottom portion of the plurality of microcapsules is embedded within the binder and a top portion of the microcapsules is emergent from the binder, thereby creating a network of valleys. The network electrode occupies at least a portion of the network of valleys.
    Type: Grant
    Filed: April 12, 2019
    Date of Patent: November 16, 2021
    Assignee: E Ink Corporation
    Inventors: Richard J. Paolini, Jr., Jay William Anseth
  • Patent number: 11156893
    Abstract: An electrophoretic device comprises a first electrode and a second electrode spaced apart from the first electrode, and between the electrodes an electrophoretic cell containing an electrophoretic ink and one or more non-planar solid polymer elements. The ink includes charged particles of at least one type suspended in a suspending fluid, and, 75% or more by mass of the suspending fluid is an organosilicone or an aliphatic hydrocarbon and the solid polymer is a fluorinated elastomeric polymer.
    Type: Grant
    Filed: June 12, 2019
    Date of Patent: October 26, 2021
    Assignee: E Ink Corporation
    Inventor: Donal O'Keeffe
  • Patent number: 11143930
    Abstract: A method of driving a variable transmission film is provided and a variable transmission device including the film and a controller configured to drive the film. The film may include a layer of electrophoretic material and at least one electrode, the electrophoretic material including a fluid containing a plurality of charged particles capable of moving through the fluid upon application of an electric field by the at least one electrode. The method may include applying a first voltage waveform to the film at an initial optical state and applying a second voltage waveform having a lower frequency and shorter pulse duration than the first voltage waveform to switch the film to a final optical state, wherein the film has a higher percent transmission at the initial optical state than the final optical state.
    Type: Grant
    Filed: June 20, 2019
    Date of Patent: October 12, 2021
    Assignee: E Ink Corporation
    Inventors: Peter Carsten Bailey Widger, George G. Harris, Richard J. Paolini, Jr., Craig Alan Breen
  • Patent number: 11143929
    Abstract: An electro-optic display is provided that may include a layer of light-transmissive conductive material, a substrate, a layer of an electro-optic medium disposed between the layer of conductive material and the substrate, a color filter array, and a light emitting layer. The electro-optic medium may include a photo-luminescent material that functions as either a down-converter or an up-converter that may be excited by the light received from the light emitting layer. The photo-luminescent material may be excited by radiation having a first wavelength transmitted by a filter within the color filter array and emit radiation having a second wavelength transmitted by the filter. The photo-luminescent material may also be excited by radiation at a wavelength within a first and second range of wavelengths transmitted by two filters within the color filter array and emit radiation at a wavelength within one of the first and second ranges.
    Type: Grant
    Filed: February 21, 2019
    Date of Patent: October 12, 2021
    Assignee: E Ink Corporation
    Inventors: Kenneth R. Crounse, Stephen J. Telfer, Dirk Hertel
  • Patent number: 11145261
    Abstract: A variety of methods for driving electro-optic displays so as to reduce visible artifacts are described. Such methods include (a) applying a first drive scheme to a non-zero minor proportion of the pixels of the display and a second drive scheme to the remaining pixels, the pixels using the first drive scheme being changed at each transition; (b) using two different drive schemes on different groups of pixels so that pixels in differing groups undergoing the same transition will not experience the same waveform; (c) applying either a balanced pulse pair or a top-off pulse to a pixel undergoing a white-to-white transition and lying adjacent a pixel undergoing a visible transition; (d) driving extra pixels where the boundary between a driven and undriven area would otherwise fall along a straight line; and (e) driving a display with both DC balanced and DC imbalanced drive schemes, maintaining an impulse bank value for the DC imbalance and modifying transitions to reduce the impulse bank value.
    Type: Grant
    Filed: April 21, 2020
    Date of Patent: October 12, 2021
    Assignee: E Ink Corporation
    Inventors: Karl Raymond Amundson, Matthew J. Aprea, Kenneth R. Crounse, Demetrious Mark Harrington, Jason Lin, Theodore A. Sjodin, Chia-Chen Su
  • Patent number: 11145262
    Abstract: An apparatus for driving an electro-optic display may comprise spaced first and second device layers, and a first and second rows of display pixels, each row may include a plurality of display pixels, each display pixel having a pixel electrode positioned on the first device layer for driving the display pixel, a conduction line positioned on the second device layer and overlapping with a portion of the plurality of display pixels' pixel electrodes, and at least one conductive path connecting the conduction line of the first row to a conduction line of the second row of display pixels.
    Type: Grant
    Filed: November 8, 2019
    Date of Patent: October 12, 2021
    Assignee: E Ink Corporation
    Inventors: Chih-Hsiang Ho, Yi Lu
  • Patent number: 11145235
    Abstract: An electro-optic display having a plurality of pixels is driven from a first image to a second image using a first drive scheme, and then from the second image to a third image using a second drive scheme different from the first drive scheme and having at least one impulse differential gray level having an impulse potential different from the corresponding gray level in the first drive scheme. Each pixel which is in an impulse differential gray level in the second image is driven from the second image to the third image using a modified version of the second drive scheme which reduces its impulse differential The subsequent transition from the third image to a fourth image is also conducted using the modified second drive scheme but after a limited number of transitions using the modified second drive scheme, all subsequent transitions are conducted using the unmodified second drive scheme.
    Type: Grant
    Filed: June 26, 2017
    Date of Patent: October 12, 2021
    Assignee: E Ink Corporation
    Inventors: Demetrious Mark Harrington, Kenneth R. Crounse, Karl Raymond Amundson, Teck Ping Sim, Matthew J. Aprea
  • Patent number: 11139594
    Abstract: A connector for an electro-optic display comprising: a non-conductive sheet having a top surface and a bottom surface; a first layer of conductive material applied to at least a portion of the bottom surface; a second layer of conductive material applied to a first portion of the top surface; a third layer of conductive material applied to a second portion of the top surface, the third layer of conductive material being electrically isolated from the second layer of conductive material; and a conductive via electrically connecting the first layer of conductive material and the second layer of conductive material.
    Type: Grant
    Filed: April 17, 2020
    Date of Patent: October 5, 2021
    Assignee: E Ink Corporation
    Inventors: Crystal Nguyen, George G. Harris, David Victor Marcolin, Seth J. Bishop
  • Patent number: 11107425
    Abstract: An electro-optic display having a plurality of display pixels, each of the plurality of display pixels comprising: a pixel electrode for driving the display pixel; a thin film transistor (TFT) coupled to the pixel electrode for transmitting waveforms to the pixel electrode; a resistor coupled to the pixel electrode for discharging remnant charges from the display subsequent to the TFT being de-activated; and a storage capacitor coupled to the pixel electrode and placed in parallel with the resistor. A time constant of a circuit comprising the pixel electrode, the resistor, and the storage capacitor is larger than a driving frame time of the electro-optic display.
    Type: Grant
    Filed: September 25, 2020
    Date of Patent: August 31, 2021
    Assignee: E Ink Corporation
    Inventors: Pierre-Yves Emelie, Teck Ping Sim, Kenneth R. Crounse, Karl Raymond Amundson, Chih-Hsiang Ho
  • Patent number: 11098206
    Abstract: Improved formulations of electrophoretic media that can be incorporated into displays, front plane laminates, inverted front plane laminates, or color changing films. The formulations include a non-polar fluid, a plurality of first charged particles, and charge control agents (CCA) including a quaternary amine and an unsaturated polymeric tail comprising monomers of at least 10 carbon atoms in length. The formulations show improved switching speeds, as well as a larger dynamic range at low temperatures (i.e., below about 0° C.), where compared to state-of-the-art electrophoretic media.
    Type: Grant
    Filed: October 4, 2016
    Date of Patent: August 24, 2021
    Assignee: E Ink Corporation
    Inventors: Ziyan Wu, Jason D. Feick, James H. Aborn, John Lock, Kosta Ladavac, Erik Dunkerley, Hui Du, Olga Vladimirovna Barykina-Tassa
  • Patent number: 11087644
    Abstract: A display (100) primarily intended for use on an external surface of a building comprises a weatherproof housing (310, 340); a bistable electro-optic medium (326) enclosed within and visible through the housing; an electrode (324, 330) enclosed within the weatherproof housing and arranged to drive the electro-optic medium; a power source (504) enclosed within the weatherproof housing; data receiving means (508) enclosed within the weatherproof housing and arranged to receive data wirelessly from a source outside the weatherproof housing; and display drive means (510) arranged to receive data from the data receiving means and power from the power source, and to control the potential of the electrode.
    Type: Grant
    Filed: July 27, 2020
    Date of Patent: August 10, 2021
    Assignee: E Ink Corporation
    Inventors: Richard J. Paolini, Jr., Carl Taussig, Seth J. Bishop, David Victor Marcolin, Russell J. Dewitte
  • Patent number: 11084935
    Abstract: Quinacridone pigments that are surface-functionalized with glycidyl methacrylate, maleic anhydride, or 4-methacryloxyethyl trimellitic anhydride to create a functionalized pigment. The functional groups are then activated to bond hydrophobic polymers, thereby coating the pigment with the hydrophobic polymers. The quinacridone pigments can be used for a variety of applications. They are well-suited for use in electro-optic materials, such as electrophoretic media for use in electrophoretic displays.
    Type: Grant
    Filed: April 13, 2020
    Date of Patent: August 10, 2021
    Assignee: E Ink Corporation
    Inventors: Ziyan Wu, Jason D. Feick
  • Patent number: 11086186
    Abstract: Variable transmission covering systems that can be used, for example, to control the amount of light passing through a window in a building. Using transmissive electrophoretic media that can switch between a first and second optical state, the invention can be used to change the color and/or transmissivity of a structure (or structures) that is placed in front of an object. In some embodiments, the variable transmission system can change transmission and color on command.
    Type: Grant
    Filed: May 7, 2019
    Date of Patent: August 10, 2021
    Assignee: E Ink Corporation
    Inventors: Ana L. Lattes, Stephen J. Telfer
  • Patent number: 11086417
    Abstract: A stylus for interacting with a magnetic writing medium, such as a magneto-electrophoretic media containing magnetic particles that can be switched electrically in the same way as a conventional electrophoretic display: e.g., between white and black states with the capability of also attaining stable intermediate states of gray. The stylus includes a magnetic sphere and a metal cylinder aligned in the tip.
    Type: Grant
    Filed: August 7, 2020
    Date of Patent: August 10, 2021
    Assignee: E Ink Corporation
    Inventors: Evan Griffith, Samantha Morrill, Richard J. Paolini, Jr.
  • Patent number: 11081066
    Abstract: An electro-optic display including an array of pixel electrodes, where each row of pixel electrodes is associated with a source line, and that source line is connected to a drive chip with a T-wire that connects from the back of the substrate to the front of the substrate through a via. The vias are spaced out, such as in a zig-zag pattern or a pseudo-random pattern to reduce the capacitive coupling between the T-wires when adjacent pixels are driven, for example when presenting text characters.
    Type: Grant
    Filed: February 12, 2019
    Date of Patent: August 3, 2021
    Assignee: E Ink Corporation
    Inventors: Chih-Hsiang Ho, Yi Lu, Yuval Ben-Dov, Teck Ping Sim
  • Patent number: 11079651
    Abstract: An electro-optic medium that may be incorporated into an electro-optic display. The medium includes a first microcapsule containing at least one of a first dispersion of colored particles and a colored fluid and an encapsulated second dispersion that may include the first microcapsule and a plurality of electrophoretic particles. The colored particles of the first dispersion may include one or more sets of differently colored electrophoretic particles. The second dispersion may be encapsulated within a second microcapsule or a microcell, for example.
    Type: Grant
    Filed: December 13, 2018
    Date of Patent: August 3, 2021
    Assignee: E Ink Corporation
    Inventors: Mark Benjamin Romanowsky, Kosta Ladavac, Stephen J. Telfer, Jay William Anseth