Patents by Inventor Joanna Au

Joanna Au 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).

  • METHODS FOR DRIVING ELECTROPHORETIC DISPLAYS
    Publication number: 20080048969
    Abstract: A pixel of an electrophoretic display is driven from one extreme optical state to a second optical state different from the one extreme optical state by applying to the pixel a first drive pulse of one polarity; and thereafter applying to the pixel a second drive pulse of the opposite polarity, the second drive pulse being effective to drive the pixel to the second optical state.
    Type: Application
    Filed: August 28, 2007
    Publication date: February 28, 2008
    Applicant: E INK CORPORATION
    Inventors: Thomas Whitesides, Joanna Au, Karl Amundson, Robert Zehner, Ara Knaian, Benjamin Zion
  • Methods for driving electro-optic displays, and apparatus for use therein
    Patent number: 7312794
    Abstract: A bistable electro-optic display has a plurality of pixels, each of which is capable of displaying at least three gray levels. The display is driven by a method comprising: storing a look-up table containing data representing the impulses necessary to convert an initial gray level to a final gray level; storing data representing at least an initial state of each pixel of the display; receiving an input signal representing a desired final state of at least one pixel of the display; and generating an output signal representing the impulse necessary to convert the initial state of said one pixel to the desired final state thereof, as determined from said look-up table. The invention also provides a method for reducing the remnant voltage of an electro-optic display.
    Type: Grant
    Filed: June 24, 2005
    Date of Patent: December 25, 2007
    Assignee: E Ink Corporation
    Inventors: Robert W. Zehner, Holly G. Gates, Karl R. Amundson, Joanna Au, Ara N. Knaian, Jonathan L. Zalesky, Alexi C. Arango
  • METHODS FOR DRIVING BISTABLE ELECTRO-OPTIC DISPLAYS, AND APPARATUS FOR USE THEREIN
    Publication number: 20060139311
    Abstract: A bistable electro-optic display has a plurality of pixels, each of which is capable of displaying at least three gray levels. The display is driven by a method comprising: storing a look-up table containing data representing the impulses necessary to convert an initial gray level to a final gray level; storing data representing at least an initial state of each pixel of the display; receiving an input signal representing a desired final state of at least one pixel of the display; and generating an output signal representing the impulse necessary to convert the initial state of said one pixel to the desired final state thereof, as determined from said look-up table. The invention also provides a method for reducing the remnant voltage of an electro-optic display.
    Type: Application
    Filed: February 27, 2006
    Publication date: June 29, 2006
    Applicant: E INK CORPORATION
    Inventors: Robert Zehner, Holly Gates, Karl Amundson, Joanna Au, Ara Knaian, Jonathan Zalesky, Alexi Arango
  • METHODS FOR DRIVING BISTABLE ELECTRO-OPTIC DISPLAYS, AND APPARATUS FOR USE THEREIN
    Publication number: 20060139310
    Abstract: A bistable electro-optic display has a plurality of pixels, each of which is capable of displaying at least three gray levels. The display is driven by a method comprising: storing a look-up table containing data representing the impulses necessary to convert an initial gray level to a final gray level; storing data representing at least an initial state of each pixel of the display; receiving an input signal representing a desired final state of at least one pixel of the display; and generating an output signal representing the impulse necessary to convert the initial state of said one pixel to the desired final state thereof, as determined from said look-up table. The invention also provides a method for reducing the remnant voltage of an electro-optic display.
    Type: Application
    Filed: February 27, 2006
    Publication date: June 29, 2006
    Applicant: E INK CORPORATION
    Inventors: Robert Zehner, Holly Gates, Karl Amundson, Joanna Au, Ara Knaian, Jonathan Zalesky, Alexi Arango
  • METHODS FOR DRIVING ELECTRO-OPTIC DISPLAYS, AND APPARATUS FOR USE THEREIN
    Publication number: 20050219184
    Abstract: A bistable electro-optic display has a plurality of pixels, each of which is capable of displaying at least three gray levels. The display is driven by a method comprising: storing a look-up table containing data representing the impulses necessary to convert an initial gray level to a final gray level; storing data representing at least an initial state of each pixel of the display; receiving an input signal representing a desired final state of at least one pixel of the display; and generating an output signal representing the impulse necessary to convert the initial state of said one pixel to the desired final state thereof, as determined from said look-up table. The invention also provides a method for reducing the remnant voltage of an electro-optic display.
    Type: Application
    Filed: June 24, 2005
    Publication date: October 6, 2005
    Applicant: E INK CORPORATION
    Inventors: Robert Zehner, Holly Gates, Karl Amundson, Joanna Au, Ara Knaian, Jonathan Zalesky, Alexi Arango