Patents by Inventor Karl R. Amundson

Karl R. Amundson has filed for patents to protect the following inventions. This listing includes patent applications that are pending as well as patents that have already been granted by the United States Patent and Trademark Office (USPTO).

  • Publication number: 20210012721
    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: Application
    Filed: September 25, 2020
    Publication date: January 14, 2021
    Inventors: Pierre-Yves EMELIE, Teck Ping SIM, Kenneth R. CROUNSE, Karl Raymond AMUNDSON, Chih-Hsiang HO
  • Publication number: 20200402469
    Abstract: An apparatus for driving an electro-optic display may comprise a first switch designed to supply a voltage to the electro-optic display during a first driving phase, a second switch designed to control the voltage during a second driving phase and a resistor coupled to the first and second switches for controlling the rate of decay of the voltage during the second driving phase.
    Type: Application
    Filed: September 3, 2020
    Publication date: December 24, 2020
    Inventors: Kenneth R. CROUNSE, Teck Ping SIM, Karl Raymond AMUNDSON, Zdzislaw Jan SZYMBORSKI
  • Patent number: 10852568
    Abstract: This invention provides methods of and related apparatus for driving an electro-optic display having a plurality of pixels. The method includes dividing the plurality of pixels into n groups, where n is an integer larger than 1, applying a full clearing waveform to at least one group of the n groups of pixels, and applying a top off waveform to cardinal pixels of the at least one group of pixels.
    Type: Grant
    Filed: March 2, 2018
    Date of Patent: December 1, 2020
    Assignee: E Ink Corporation
    Inventors: Kenneth R. Crounse, Karl Raymond Amundson, Teck Ping Sim, Yuval Ben-Dov, Chih-Hsiang Ho
  • Patent number: 10825405
    Abstract: A thin film transistor (TFT) backplane comprising a plurality of electrodes. Each of the plurality of electrodes is coupled to circuitry comprising: a first thin film transistor (TFT) coupled to the electrode for transmitting waveforms to the electrode, and a second TFT coupled to the electrode for discharging remnant charges from the electrode, wherein the second TFT is activated subsequent to the first TFT being deactivated.
    Type: Grant
    Filed: January 17, 2020
    Date of Patent: November 3, 2020
    Assignee: E Ink Corporatior
    Inventors: Pierre-Yves Emelie, Teck Ping Sim, Kenneth R. Crounse, Karl Raymond Amundson, Chih-Hsiang Ho
  • Patent number: 10803813
    Abstract: An apparatus for driving an electro-optic display may comprise a first switch designed to supply a voltage to the electro-optic display during a first driving phase, a second switch designed to control the voltage during a second driving phase and a resistor coupled to the first and second switches for controlling the rate of decay of the voltage during the second driving phase.
    Type: Grant
    Filed: September 15, 2016
    Date of Patent: October 13, 2020
    Assignee: E Ink Corporation
    Inventors: Kenneth R. Crounse, Teck Ping Sim, Karl Raymond Amundson, Zdzislaw Jan Szymborski
  • Publication number: 20200265790
    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: Application
    Filed: April 21, 2020
    Publication date: August 20, 2020
    Inventors: Karl Raymond AMUNDSON, Matthew J. APREA, Kenneth R. CROUNSE, Demetrious Mark HARRINGTON, Jason LIN, Theodore A. SJODIN, Chia-Chen SU
  • Publication number: 20200242993
    Abstract: An electrophoretic medium includes a fluid, a first, light scattering particle (typically white) and second, third and fourth particles having three subtractive primary colors (typically magenta, cyan and yellow); at least two of these colored particles being non-light scattering. The first and second particles bear polymer coatings such that the electric field required to separate an aggregate formed by the third and the fourth particles is greater than that required to separate an aggregate formed from any other two types of particles. Methods for driving the medium to produce white, black, magenta, cyan, yellow, red, green and blue colors are also described.
    Type: Application
    Filed: April 10, 2020
    Publication date: July 30, 2020
    Inventors: Stephen J. TELFER, Richard J. PAOLINI, JR., Karl Raymond AMUNDSON, Kenneth R. CROUNSE, Alain BOUCHARD, Sunil Krishna SAINIS
  • Publication number: 20200183247
    Abstract: The invention provides an electrophoretic medium comprising at least two types of particles having substantially the same electrophoretic mobility but differing colors. The invention also provides article of manufacture comprising a layer of a solid electro-optic medium, a first adhesive layer on one surface of the electro-optic medium, a release sheet covering the first adhesive layer, and a second adhesive layer on an opposed second surface of the electro-optic medium.
    Type: Application
    Filed: February 19, 2020
    Publication date: June 11, 2020
    Inventors: Gregg M. DUTHALER, Karl R. AMUNDSON, Barrett COMISKEY, Alberto GOENAGA, John E. RITTER, Michael L. STEINER, Robert W. ZEHNER
  • Patent number: 10672350
    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: January 31, 2013
    Date of Patent: June 2, 2020
    Assignee: E Ink Corporation
    Inventors: Karl R. Amundson, Matthew J. Aprea, Kenneth R. Crounse, Demetrious Mark Harrington, Jason Lin, Theodore A. Sjodin, Chia-Chen Su
  • Patent number: 10657869
    Abstract: An electrophoretic medium includes a fluid, a first, light scattering particle (typically white) and second, third and fourth particles having three subtractive primary colors (typically magenta, cyan and yellow); at least two of these colored particles being non-light scattering. The first and second particles bear polymer coatings such that the electric field required to separate an aggregate formed by the third and the fourth particles is greater than that required to separate an aggregate formed from any other two types of particles. Methods for driving the medium to produce white, black, magenta, cyan, yellow, red, green and blue colors are also described.
    Type: Grant
    Filed: May 23, 2017
    Date of Patent: May 19, 2020
    Assignee: E Ink Corporation
    Inventors: Stephen J. Telfer, Richard J. Paolini, Jr., Karl Raymond Amundson, Kenneth R. Crounse, Alain Bouchard, Sunil Krishna Sainis
  • Publication number: 20200152137
    Abstract: A thin film transistor (TFT) backplane comprising a plurality of electrodes. Each of the plurality of electrodes is coupled to circuitry comprising: a first thin film transistor (TFT) coupled to the electrode for transmitting waveforms to the electrode, and a second TFT coupled to the electrode for discharging remnant charges from the electrode, wherein the second TFT is activated subsequent to the first TFT being deactivated.
    Type: Application
    Filed: January 17, 2020
    Publication date: May 14, 2020
    Inventors: Pierre-Yves EMELIE, Teck Ping SIM, Kenneth R. CROUNSE, Karl Raymond AMUNDSON, Chih-Hsiang HO
  • Patent number: 10599005
    Abstract: The invention provides an electrophoretic medium comprising at least two types of particles having substantially the same electrophoretic mobility but differing colors. The invention also provides article of manufacture comprising a layer of a solid electro-optic medium, a first adhesive layer on one surface of the electro-optic medium, a release sheet covering the first adhesive layer, and a second adhesive layer on an opposed second surface of the electro-optic medium.
    Type: Grant
    Filed: April 10, 2018
    Date of Patent: March 24, 2020
    Assignee: E Ink Corporation
    Inventors: Gregg M. Duthaler, Karl R. Amundson, Barrett Comiskey, Alberto Goenaga, John E. Ritter, Michael L. Steiner, Robert W. Zehner
  • Patent number: 10573257
    Abstract: An electro-optic display having an electrophoretic material configured for displaying images, and an active component coupled to the electrophoretic material for discharging charges within the electrophoretic material.
    Type: Grant
    Filed: May 30, 2018
    Date of Patent: February 25, 2020
    Assignee: E Ink Corporation
    Inventors: Pierre-Yves Emelie, Teck Ping Sim, Kenneth R. Crounse, Karl Raymond Amundson, Chih-Hsiang Ho
  • Patent number: 10475396
    Abstract: Electro-optic displays with reduced remnant voltage, and related apparatus and methods are provided. A remnant voltage of a pixel of an electro-optic display may be discharged by activating the pixel's transistor and setting the voltages of the front and rear electrodes of the pixel to approximately the same voltage for a specified period of time, and/or until the amount of remnant voltage remaining in the pixel is less than a threshold amount. The remnant voltages of substantially all pixels or a subset of pixels in an active matrix electro-optic display may be simultaneously discharged. The simultaneous discharge of the remnant voltages of pixels may take place when the pixels are in a same state, characterized by (1) the transistor of each pixel being active, and (2) the voltages applied to the front and rear electrodes of each pixel being approximately equal.
    Type: Grant
    Filed: February 3, 2016
    Date of Patent: November 12, 2019
    Assignee: E Ink Corporation
    Inventors: Teck Ping Sim, Kenneth R. Crounse, Pierre-Yves Emelie, Karl Raymond Amundson
  • Patent number: 10319314
    Abstract: A method for addressing a bistable electro-optic display having at least one pixel comprises applying an addressing pulse to drive the pixel to a first optical state; leaving the pixel undriven for a period of time, thereby permitting the pixel to assume a second optical state different from the first optical state; and applying to the pixel a refresh pulse which substantially restores the pixel to the first optical state, the refresh pulse being short relative to the addressing pulse.
    Type: Grant
    Filed: August 3, 2015
    Date of Patent: June 11, 2019
    Assignee: E Ink Corporation
    Inventors: Guy M. Danner, Karl R. Amundson, Alexandros Cosmos Arango, Jay Britton Ewing, Robert W. Zehner
  • Publication number: 20180231865
    Abstract: The invention provides an electrophoretic medium comprising at least two types of particles having substantially the same electrophoretic mobility but differing colors. The invention also provides article of manufacture comprising a layer of a solid electro-optic medium, a first adhesive layer on one surface of the electro-optic medium, a release sheet covering the first adhesive layer, and a second adhesive layer on an opposed second surface of the electro-optic medium.
    Type: Application
    Filed: April 10, 2018
    Publication date: August 16, 2018
    Inventors: Gregg M. Duthaler, Karl R. Amundson, Barrett Comiskey, Alberto Goenaga, John E. Ritter, Michael L. Steiner, Robert W. Zehner
  • Patent number: 10037735
    Abstract: An active matrix electro-optic display (100) includes capacitor electrodes (110, 112) associated with the pixel electrodes (106, 108) so that the pixel electrode and its associated capacitor electrode form a capacitor. The display (100) also includes switching means (120) having one position in which each capacitor electrode (110, 112) is electrically connected to the light-transmissive front electrode (102) of the display (100) and a second position in which each capacitor electrode (110, 112) is electrically connected to a voltage source having a voltage independent of the voltage on the light-transmissive electrode.
    Type: Grant
    Filed: November 14, 2013
    Date of Patent: July 31, 2018
    Assignee: E Ink Corporation
    Inventor: Karl R. Amundson
  • Patent number: 9966018
    Abstract: Methods are provided for of driving a bistable electro-optic display having at least first and second pixels separated by an inter-pixel gap. In one method, there is applied to the first pixel a drive pulse which drives the pixel to one extreme optical state, and there is applied to the second pixel, which is in this extreme optical state, a reinforcing pulse of the same polarity as the drive pulse. In a second method, a drive pulse applied to the first pixel drives that pixel away from one extreme optical state, and an inverse reinforcing pulse applied to the second pixel is of opposite polarity to the drive pulse. The drive methods reduce edge ghosting or blooming.
    Type: Grant
    Filed: April 7, 2015
    Date of Patent: May 8, 2018
    Assignee: E Ink Corporation
    Inventors: Elizabeth Moran Gates, Karl R. Amundson
  • Patent number: 9886886
    Abstract: An electro-optic display, having at least one pixel capable of achieving any one of at least four different gray levels including two extreme optical states, is driven by displaying a first image on the display, and rewriting the display to display a second image thereon, wherein, during the rewriting of the display, any pixel which has undergone a number of transitions exceeding a predetermined value without touching an extreme optical state, is driven to at least one extreme optical state before driving that pixel to its final optical state in the second image.
    Type: Grant
    Filed: July 5, 2016
    Date of Patent: February 6, 2018
    Assignee: E Ink Corporation
    Inventors: Karl R. Amundson, Robert W. Zehner, Ara N. Knaian, Benjamin Zion
  • Publication number: 20170168370
    Abstract: A dielectrophoretic display has a substrate having walls defining a cavity, the cavity having a viewing surface and a side wall inclined to the viewing surface. A fluid is contained within the cavity; and a plurality of particles are present in the fluid. There is applied to the substrate an electric field effective to cause dielectrophoretic movement of the particles so that the particles occupy only a minor proportion of the viewing surface.
    Type: Application
    Filed: February 27, 2017
    Publication date: June 15, 2017
    Inventors: Karl R. Amundson, Alexandros Cosmos Arango, Joseph M. Jacobson, Thomas H. Whitesides, Michael D. McCreary, Richard J. Paolini, JR.