Patents by Inventor Stephen J. Telfer

Stephen J. Telfer 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: 20200096779
    Abstract: An apparatus for a three-dimensional display is disclosed that includes a waveguide having a pair of opposed faces configured to propagate radiation along a length of the waveguide between the faces, a radiation source optically coupled to the waveguide and configured to transmit the radiation to the waveguide, at least one prismatic element having a face optically coupled to at least one of the faces of the waveguide, and a layer of image modulating material optically coupled to at least one of the faces of the waveguide. The image modulating material may be optically coupled to an area of at least one of the faces of the waveguide, at least a portion of the area being located outside a perimeter of a face of the prismatic element optically coupled to at least one of the faces of the waveguide.
    Type: Application
    Filed: September 10, 2019
    Publication date: March 26, 2020
    Inventors: Stephen J. TELFER, Stephen BULL, John L. CHUMA, George G. HARRIS, Kosta LADAVAC, Allan SADUN
  • Patent number: 10593272
    Abstract: A method for driving an electro-optic display having a front electrode, a backplane, and a display medium including at least three differently-colored particles, wherein the medium is positioned between the front electrode and the backplane. The method includes applying a reset phase and a color transition phase to the display such that the sum of all impulses results in an offset that maintains a DC-balance across the display medium. The invention additionally includes controllers for executing the method.
    Type: Grant
    Filed: March 9, 2018
    Date of Patent: March 17, 2020
    Assignee: E Ink Corporation
    Inventors: Stephen J. Telfer, Christopher L. Hoogeboom, Kenneth R. Crounse
  • Patent number: 10573222
    Abstract: A first display comprises a layer of electro-optic material with first and second electrodes on opposed sides thereof, at least one electrode. One or both electrodes having at least two spaced contacts, and voltage control means are arranged to vary the potential difference between the two spaced contacts attached to the same electrode. A second display comprises a layer of electro-optic material with a sequence of at least three electrodes adjacent thereto. Voltage control means vary the potential difference between the first and last electrodes of the sequence. The electrodes of the sequence alternate between the two surfaces of the layer of electro-optic material, and have edges which overlap with or lie adjacent the preceding and following electrodes of the sequence. The electrodes, other than the first and last, are electrically isolated such that the potential thereof is controlled by passage of current through the layer of electro-optic material. Methods for driving these displays are also provided.
    Type: Grant
    Filed: January 5, 2016
    Date of Patent: February 25, 2020
    Assignee: E Ink Corporation
    Inventors: Richard J. Paolini, Jr., Stephen Bull, Seth J. Bishop, Stephen J. Telfer, Karl Raymond Amundson
  • Publication number: 20200057347
    Abstract: An electro-optic display comprising at least two separate layers of electro-optic material, with one of these layers being capable of displaying at least one optical state which cannot be displayed by the other layer. The display is driven by a single set of electrodes between which both layers are sandwiched, the two layers being controllable at least partially independently of one another. Another form of the invention uses three different types of particles within a single electrophoretic layer, with the three types of particles being arranged to shutter independently of one another.
    Type: Application
    Filed: October 24, 2019
    Publication date: February 20, 2020
    Inventors: Stephen J. TELFER, Richard J. PAOLINI, JR., Sunil Krishna SAINIS, Randal M. HILL, Isaac W. MORAN, Lee YEZEK, Alain BOUCHARD, William VETTERLING, George G. HARRIS, Hywel MORGAN, Luke SLOMINSKI, Jay William ANSETH, Jennifer M. MORRISON, Craig A. HERB
  • Patent number: 10551713
    Abstract: A first display includes a layer of electro-optic material with first and second electrodes on opposed sides thereof. One or both electrodes have at least two spaced contacts. Voltage control means are arranged to vary the potential difference between the two spaced contacts attached to the same electrode. A second display includes a layer of electro-optic material with a sequence of at least three electrodes adjacent thereto. Voltage control means vary the potential difference between the first and last electrodes of the sequence. The electrodes of the sequence alternate between two surfaces of the layer of electro-optic material, and have edges that overlap or lie adjacent the preceding and following electrodes of the sequence. The electrodes, other than the first and last, are electrically isolated such that the potential thereof is controlled by passage of current through the layer of electro-optic material. Methods for driving these displays are also provided.
    Type: Grant
    Filed: December 20, 2018
    Date of Patent: February 4, 2020
    Assignee: E Ink Corporation
    Inventors: Richard J. Paolini, Jr., Stephen Bull, Seth J. Bishop, Karl Raymond Amundson, Stephen J. Telfer, George G. Harris
  • Publication number: 20200035171
    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: Application
    Filed: September 27, 2019
    Publication date: January 30, 2020
    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
  • Publication number: 20200020301
    Abstract: A system for rendering color images on an electro-optic display when the electro-optic display has a color gamut with a limited palette of primary colors, and/or the gamut is poorly structured (i.e., not a spheroid or obloid). The system uses an iterative process to identify the best color for a given pixel from a palette that is modified to diffuse the color error over the entire electro-optic display. The system additionally accounts for variations in color that are caused by cross-talk between nearby pixels.
    Type: Application
    Filed: September 19, 2019
    Publication date: January 16, 2020
    Inventors: Edward BUCKLEY, Kenneth R. CROUNSE, Stephen J. TELFER, Sunil Krishna SAINIS
  • Patent number: 10520786
    Abstract: An electro-optic display having a viewing surface through which a user views the display, a bistable, non-electrochromic electro-optic medium, and at least one electrode arranged to apply an electric field to the electro-optic medium, the display further comprising at least 10 micromoles per square meter of the viewing surface of at least one compound having an oxidation potential more negative that about 150 mV with respect to a standard hydrogen electrode, as measured at pH 8, where the compound having the oxidation potential comprises one or more compounds of Formulae I below: where in Formulae I, R1-R4 may be substituted or unsubstituted alkyl or aryl groups, or heteroatomic groups containing hetero atoms of Groups V-VII of the periodic table, and substituents R1 and R2 (taken together), and/or R3 and R4, may form a ring.
    Type: Grant
    Filed: June 30, 2017
    Date of Patent: December 31, 2019
    Assignee: E Ink Corporation
    Inventors: Stephen J. Telfer, Peter Carsten Bailey Widger, Ana L. Lattes, Dan John Lauber
  • Patent number: 10509293
    Abstract: An electrophoretic medium comprises 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: December 26, 2017
    Date of Patent: December 17, 2019
    Assignee: E Ink Corporation
    Inventors: Stephen J. Telfer, Stephen Bull, David Darrell Miller, Christopher L. Hoogeboom, Ana L. Lattes, Brandon MacDonald, Kosta Ladavac
  • Patent number: 10509294
    Abstract: An image display medium includes a first and second layer of encapsulated dispersion fluid containing charged particles and a front and rear light-transmissive electrode. The first layer is positioned between the front light-transmissive electrode and the second layer and the second layer is position between the first layer and the rear light-transmissive electrode. The charged particles within the first layer have a color similar to and a charge opposite of the charged particles within the second layer. Alternatively, the charged particles within the first layer may have a color and a charge similar to the charged particles within the second layer and the display medium includes a common conductor positioned between the first and second layer that is configured to drive the charged particles in the first and second layer.
    Type: Grant
    Filed: December 27, 2017
    Date of Patent: December 17, 2019
    Assignee: E Ink Corporation
    Inventor: Stephen J. Telfer
  • Patent number: 10475399
    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: January 31, 2019
    Date of Patent: November 12, 2019
    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: 10467984
    Abstract: A system for rendering color images on an electro-optic display when the electro-optic display has a color gamut with a limited palette of primary colors, and/or the gamut is poorly structured (i.e., not a spheroid or obloid). The system uses an iterative process to identify the best color for a given pixel from a palette that is modified to diffuse the color error over the entire electro-optic display. The system additionally accounts for variations in color that are caused by cross-talk between nearby pixels.
    Type: Grant
    Filed: March 2, 2018
    Date of Patent: November 5, 2019
    Assignee: E Ink Corporation
    Inventors: Edward Buckley, Kenneth R. Crounse, Stephen J. Telfer, Sunil Krishna Sainis
  • Patent number: 10446585
    Abstract: The present invention provides for an electro-optic display having a backplane assembly with at least two electrode layers, a first electrode layer of a first dimension electrically connected to and driving a second electrode layer of a second dimension that is larger than the first dimension. The second electrode layer overlies the first electrode layer, such that the entire viewing area of an electro-optic display may be optically-active. The backplane assembly may have at least one interposer layer disposed between the two electrode layers to electrically connect the first and second electrode layers.
    Type: Grant
    Filed: March 17, 2015
    Date of Patent: October 15, 2019
    Assignee: E Ink Corporation
    Inventors: George G. Harris, Stephen J. Telfer, Richard J. Paolini, Jr.
  • Publication number: 20190285961
    Abstract: The present invention provides for a method of rendering an image on a reflective display wherein each pixel is capable of rendering a limited number of colors, each of which is rendered by predetermined set of waveforms stored in a waveform lookup table. Furthermore, the present invention provides for a method for rendering an image using such colors, having been chosen for optimal color rendition. This invention further provides for rendering a color image formed from a plurality of pixels on a reflective display wherein each pixel has a color selected from the group consisting of at least: red, green, blue, cyan, magenta, yellow, black and white.
    Type: Application
    Filed: June 4, 2019
    Publication date: September 19, 2019
    Inventors: Alain BOUCHARD, Stephen J. TELFER
  • Publication number: 20190278149
    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: Application
    Filed: February 21, 2019
    Publication date: September 12, 2019
    Inventors: Kenneth R. CROUNSE, Stephen J. TELFER, Dirk HERTEL
  • Publication number: 20190258132
    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.
    Type: Application
    Filed: May 7, 2019
    Publication date: August 22, 2019
    Inventors: Ana L. LATTES, Stephen J. TELFER
  • Patent number: 10388233
    Abstract: Devices and techniques for electronically erasing an externally addressed electrophoretic drawing device are described. An electronically-erasable drawing device comprises an electro-optic display medium and interdigitated electrodes disposed adjacent one surface of the medium and configured to drive the medium to an intermediate (gray) optical state. A mobile electronic drawing implement may include electrodes configured to apply a fringing electric field to an electro-optic display medium from one side of the medium, the fringing electric field being arranged to drive a portion of the display medium adjacent the implement to an intermediate optical state, the electrodes being movable relative to the medium.
    Type: Grant
    Filed: August 31, 2016
    Date of Patent: August 20, 2019
    Assignee: E Ink Corporation
    Inventors: Richard J. Paolini, Jr., Stephen J. Telfer
  • Patent number: 10380954
    Abstract: Methods for driving electro-optic displays, especially bistable displays, include (a) using two-part waveforms, the first part of which is dependent only upon the initial state of the relevant pixel; (b) measuring the response of each individual pixel and storing for each pixel data indicating which of a set of standard drive schemes are to be used for that pixel; (c) for at least one transition in a drive scheme, applying multiple different waveforms to pixels on a random basis; and (d) when updating a limited area of the display, driving “extra” pixels in an edge elimination region to avoid edge effects.
    Type: Grant
    Filed: July 12, 2016
    Date of Patent: August 13, 2019
    Assignee: E Ink Corporation
    Inventors: Demetrious Mark Harrington, Kenneth R. Crounse, Alain Bouchard, Stephen J. Telfer, Ana L. Lattes
  • Patent number: 10372008
    Abstract: A wavelength selective reflection display (10) comprises a wavelength selective reflection medium (20) and a backing member (30) having a first, non-reflective optical state, and a second, reflective optical state. Both the wavelength selective reflection medium (20) and the backing member (30) are divided into pixels (40, 50, 60), and the backing member (30) is switchable between its first and second optical states on a pixel-by-pixel basis. The pixels of the backing member (30) are substantially aligned with those of the wavelength selective reflection medium (20).
    Type: Grant
    Filed: May 18, 2012
    Date of Patent: August 6, 2019
    Assignee: E Ink Corporation
    Inventors: Stephen J. Telfer, Richard J. Paolini, Jr., Michael D. McCreary, David John Cole
  • Publication number: 20190228717
    Abstract: A method for driving an electro-optic display having a front electrode and a back plane, the method including applying a first voltage to the front electrode having a first magnitude, applying a second voltage to the back plane having a second magnitude, the second voltage including an offset voltage having a third magnitude; and determining an impulse offset value based on the applied offset voltage.
    Type: Application
    Filed: March 29, 2019
    Publication date: July 25, 2019
    Inventors: Kenneth R. CROUNSE, Christopher L. HOOGEBOOM, Stephen J. TELFER