Patents by Inventor Mark T. Johnson

Mark T. Johnson 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: 20120303013
    Abstract: A system that interfaces with a workstation endocardial mapping system allows for the rapid and successful ablation of cardiac tissue. The system allows a physician to see a representation of the physical location of a catheter in a representation of an anatomic model of the patient's heart. The workstation is the primary interface with the physician. A servo catheter having pull wires and pull rings for guidance and a servo catheter control system are interfaced with the workstation. Servo catheter control software may run on the workstation. The servo catheter is coupled to an RF generator. The physician locates a site for ablation therapy and confirms the location of the catheter. Once the catheter is located at the desired ablation site, the physician activates the RF generator to deliver the therapy.
    Type: Application
    Filed: June 25, 2012
    Publication date: November 29, 2012
    Inventors: John A. Hauck, Eric Olson, Jeff A. Schweitzer, Jeff Burell, Mark T. Johnson
  • Patent number: 8294641
    Abstract: The invention relates to an active matrix display device comprising a display with a plurality of display pixels, each having a current driven emissive element, a data input for receiving an analogue data signal, at least one drive element connected to a power supply and arranged to drive the current emissive element in accordance with the data signal and selecting means arranged to provide, in response to a select signal, the data signal to the at least one drive element to generate an overall brightness level during a frame period in accordance with the data signal. The device is adapted to divide the frame period in at least a first sub-period during which the emissive element carries a first non-zero current and a second sub-period during which the emissive element carries a second non-zero current, the at least first and second non-zero current yielding the overall brightness level.
    Type: Grant
    Filed: July 7, 2004
    Date of Patent: October 23, 2012
    Assignee: Koninklijke Philips Electronics N.V.
    Inventors: Mark T. Johnson, Nebojsa Fisekovic
  • Patent number: 8207928
    Abstract: The invention relates to an active matrix display device comprising a display with a plurality of display pixels, a data input for receiving a data signal and a controller for distributing said data signal over said display pixels to generate an image on said display with an overall brightness value for each display pixel during at least one frame period. The device is adapted to divide said frame period for at least one subset of said display pixels such that said display pixels of said at least one subset have at least a light output at a first non-zero brightness level during a first sub-period of said frame period and at a second non-zero brightness level during a second sub-period of said frame period, the time averaged sum of said brightness levels being substantially equal to said overall brightness level.
    Type: Grant
    Filed: August 20, 2004
    Date of Patent: June 26, 2012
    Assignee: Koninklijke Philips Electronics N.V.
    Inventors: Mark T. Johnson, Nebojsa Fisekovic
  • Patent number: 8206383
    Abstract: A system that interfaces with a workstation endocardial mapping system allows for the rapid and successful ablation of cardiac tissue. The system allows a physician to see a representation of the physical location of a catheter in a representation of an anatomic model of the patient's heart. The workstation is the primary interface with the physician. A servo catheter having pull wires and pull rings for guidance and a servo catheter control system are interfaced with the workstation. Servo catheter control software may run on the workstation. The servo catheter is coupled to an RF generator. The physician locates a site for ablation therapy and confirms the location of the catheter. Once the catheter is located at the desired ablation site, the physician activates the RF generator to deliver the therapy.
    Type: Grant
    Filed: December 15, 2009
    Date of Patent: June 26, 2012
    Assignee: St. Jude Medical, Atrial Fibrillation Division, Inc.
    Inventors: John A. Hauck, Eric Olson, Jeff A. Schweitzer, Jeff Burrell, Mark T. Johnson
  • Patent number: 8125414
    Abstract: An EL display device is operable in analogue and digital modes. In the analogue mode a current is supplied to the EL display elements (2) in dependence on a data signal (6) supplied to the pixel, and in the digital mode one of two voltages is provided across the EL display elements in dependence on the data signal supplied to the pixel. This enables the display to have a low power standby mode in which a digital drive scheme is implemented. This is particularly appropriate for static images and preferably for images without grey scales. The first mode is the normal current addressing mode.
    Type: Grant
    Filed: November 22, 2002
    Date of Patent: February 28, 2012
    Assignee: Koninklijke Philips Electronics N.V.
    Inventors: Iain M. Hunter, Mark T. Johnson, Mark J. Childs
  • Patent number: 8111222
    Abstract: The output uniformity of a display device, such as a self light emitting display device, is improved by detecting the emitted brightness of pixels of the display device using an external detection system, controlling the pixel intensity to determine the non-uniformity of the driver circuits connected with the pixels, and generating a calibration factor for the pixels to modify the output of the driver circuits. Calibration can be performed for each pixel, or each group of pixels, such as each row and column of pixels.
    Type: Grant
    Filed: November 14, 2003
    Date of Patent: February 7, 2012
    Assignee: Koninklijke Philips Electronics N.V.
    Inventors: Mark T. Johnson, Markus H. Klein
  • Publication number: 20110218491
    Abstract: An apparatus for determining a length of a portion of a steering wire disposed within a bendable medical device includes an electrical contact slidably coupled with a steering wire, an electrical source configured to transmit an electrical signal through a portion of the steering wire, and a processor configured to monitor a parameter of the electrical signal at or about the electrical contact and configured to determine a length of a portion of the steering wire using the monitored parameter.
    Type: Application
    Filed: March 2, 2010
    Publication date: September 8, 2011
    Inventors: John A. Hauck, Mark T. Johnson
  • Publication number: 20110109670
    Abstract: An active matrix display panel comprises a substrate, an array of pixel circuits being arranged in a matrix of at least one column and a plurality of rows on the substrate, each pixel circuit comprising a light-emitting element, capable of emitting light of an intensity determined by the value of a current passed through it, and at least one column line, each column line arranged to conduct a reference current, provided by a current driving circuit, when connected to the panel. The pixel circuits in a column are divided into a plurality of groups of at least one pixel circuit. The active matrix display panel comprises at least one current mirror circuit associated with a first group, comprising a first current mirror, arranged to mirror a reference current flowing through a column line to a first current mirror output.
    Type: Application
    Filed: November 16, 2010
    Publication date: May 12, 2011
    Applicant: TPO Displays Corp.
    Inventors: Adrianus Sempel, Gerben J. Hekstra, David A. Fish, Alan G. Knapp, Andrea Giraldo, Mark T. Johnson
  • Patent number: 7859493
    Abstract: An active matrix display panel comprises a substrate, array of pixel circuits being arranged in a matrix of at least one column and a plurality of rows on the substrate, each pixel circuit comprising a light-emitting element, capable of emitting light of an intensity determined by the value of a current passed through it, and at least one column line, each column line arranged to conduct a reference current, provided by a current driving circuit, when connected to the panel. The pixel circuits in a column are divided into a plurality of groups of at least one pixel circuit. The active matrix display panel comprises at least one current mirror circuit associated with a first group, comprising a first current mirror, arranged to mirror a reference current flowing through a column line to a first current mirror output.
    Type: Grant
    Filed: April 15, 2004
    Date of Patent: December 28, 2010
    Assignee: TPO Displays Corp.
    Inventors: Adrianus Sempel, Gerben J. Hekstra, David A. Fish, Alan G. Knapp, Andrea Giraldo, Mark T. Johnson
  • Patent number: 7839381
    Abstract: An image is updated on a bi-stable display (310) such as an electrophoretic display in successive frame periods by accessing data defining a set of voltage waveforms for the successive frame periods. At least a portion of the bi-stable display is driven during the successive frame periods according to the accessed data so that a longer frame period (FT, 1302, 1304, 1402, 1502, 1602, 1702, 1802) is used during at least a first portion of the voltage waveforms, and a shorter frame period (FT?) is used during at least a second portion of the voltage waveforms. For example, the longer frame period may be an elongated frame period, which is the longest period during which each of the voltage waveforms has a respective constant voltage value.
    Type: Grant
    Filed: August 30, 2004
    Date of Patent: November 23, 2010
    Assignee: Koninklijke Philips Electronics N.V.
    Inventors: Guofu Zhou, Alex V. Henzen, Jan van de Kamer, Mark T. Johnson
  • Patent number: 7804483
    Abstract: An electrophoretic display (10) and a system (12) implement a method of activating a portion of the electrophoretic display (10). The method involves a reception of drawing information (14), a determination of at least one drawing-mode waveform (68) based on the drawing information (14), and an addressing of the electrophoretic display (10) based on the received drawing information (14) and the drawing-mode waveform (68).
    Type: Grant
    Filed: April 11, 2005
    Date of Patent: September 28, 2010
    Assignee: Koninklijke Philips Electronics N.V.
    Inventors: Guofu Zhou, Neculai N. Ailenei, Johannes P. van de Kamer, Alexander V. Henzen, Roger P. A. Deinoij, Mark T. Johnson, Rogier H. M. Cortie, Mischa E. T. Nelis
  • Patent number: 7737925
    Abstract: A pixel cell in an active matrix display comprising a current driven emissive element such as an OLED (20) and a data input (17) for receiving an analogue data signal (Vin). The pixel has at least two drive elements (12, 14), each being connected to a power supply (16) and arranged to drive the emissive element in accordance with the data signal, and selecting means (22, 24) for providing, in response to a select signal (21, 23), the data signal to at least one of the drive elements (12, 14). Further, each drive element is adapted to drive the emissive element (20) in a different drive current range in response to a given data signal. Thereby, a required brightness range can be obtained while data voltages too close to the threshold voltage may be avoided.
    Type: Grant
    Filed: November 27, 2003
    Date of Patent: June 15, 2010
    Assignee: Koninklijke Philips Electronics N.V.
    Inventors: Andrea Giraldo, Mark T. Johnson
  • Publication number: 20100094281
    Abstract: A system that interfaces with a workstation endocardial mapping system allows for the rapid and successful ablation of cardiac tissue. The system allows a physician to see a representation of the physical location of a catheter in a representation of an anatomic model of the patient's heart. The workstation is the primary interface with the physician. A servo catheter having pull wires and pull rings for guidance and a servo catheter control system are interfaced with the workstation. Servo catheter control software may run on the workstation. The servo catheter is coupled to an RF generator. The physician locates a site for ablation therapy and confirms the location of the catheter. Once the catheter is located at the desired ablation site, the physician activates the RF generator to deliver the therapy.
    Type: Application
    Filed: December 15, 2009
    Publication date: April 15, 2010
    Inventors: John A. Hauck, Eric Olson, Jeff A. Schweitzer, Jeff Burell, Mark T. Johnson
  • Publication number: 20100000547
    Abstract: The present invention provides a differential pressure body suit with external support against body suit migration. In its preferred embodiment, such body suit may comprise a close-fitting, multi-layered suit sealed against a mammal's skin to contain the differential pressure, or a looser-fitting suit that bends at the mammal's joints with minimal force. External support means include either fixed or movable mechanical supports attached to the body suit, extraordinary air pressure levels for making the body suit rigid, or exoskeletons attached to the body suit. A cyclic control system can turn the differential pressure condition within the body suit on and off on a selective basis to accommodate the movement of the legs of the mammal. This differential pressure body suit provides a portable and convenient system for, e.g., rehabilitating a skeletal joint injury or training the mammal for injury prevention or athletic performance or fat burning.
    Type: Application
    Filed: June 12, 2009
    Publication date: January 7, 2010
    Inventors: Douglas E. Johnson, John A. Hauck, Odd Osland, Mark T. Johnson
  • Patent number: 7632265
    Abstract: A system that interfaces with a workstation endocardial mapping system allows for the rapid and successful ablation of cardiac tissue. The system allows a physician to see a representation of the physical location of a catheter in a representation of an anatomic model of the patient's heart. The workstation is the primary interface with the physician. A servo catheter having pull wires and pull rings for guidance and a servo catheter control system are interfaced with the workstation. Servo catheter control software may run on the workstation. The servo catheter is coupled to an RF generator. The physician locates a site for ablation therapy and confirms the location of the catheter. Once the catheter is located at the desired ablation site, the physician activates the RF generator to deliver the therapy.
    Type: Grant
    Filed: May 27, 2005
    Date of Patent: December 15, 2009
    Assignee: St. Jude Medical, Atrial Fibrillation Division, Inc.
    Inventors: John A. Hauck, Eric Olson, Jeff A. Schweitzer, Jeff Burrell, Mark T. Johnson
  • Patent number: 7623113
    Abstract: An image is updated on a bi-stable display (310) such as an electrophoretic display by providing separate scaling functions (SF1, SF2) for scaling a duration of a reset pulse (R) and a duration of a driving pulse (D) in a drive waveform based on temperature (335). An absolute value of a slope with varying temperatures of the scaling factor (SF1) for the reset pulse (R) is significantly greater than that of the scaling factor (SF2) for the driving pulse (D), while both scaling factors increase with decreasing temperature. Image update time (IUT) is significantly reduced at lower temperatures, while a range of variation of IUT across all temperatures is also reduced. Scaling functions (SF3, SF4) may also be used for scaling a duration of a help reset pulse (H) and/or a duration of one or more shaking pulses (SH1, SH2).
    Type: Grant
    Filed: September 9, 2004
    Date of Patent: November 24, 2009
    Assignee: Koninklijke Philips Electronics N.V.
    Inventors: Guofu Zhou, Rogier H. M. Cortie, Mark T. Johnson, Jan van de Kamer
  • Publication number: 20090255531
    Abstract: The present invention provides a differential pressure body suit with external support against body suit migration. In its preferred embodiment, such body suit may comprise a close-fitting, multi-layered suit sealed against a mammal's skin to contain the differential pressure, or a looser-fitting suit that bends at the mammal's joints with minimal force. External support means include either fixed or movable mechanical supports attached to the body suit, extraordinary air pressure levels for making the body suit rigid, or exoskeletons attached to the body suit. A cyclic control system can turn the differential pressure condition within the body suit on and off on a selective basis to accommodate the movement of the legs of the mammal. This differential pressure body suit provides a portable and convenient system for, e.g., rehabilitating a skeletal joint injury or training the mammal for injury prevention or athletic performance.
    Type: Application
    Filed: January 7, 2009
    Publication date: October 15, 2009
    Inventors: Douglas E. Johnson, John A. Hauck, Odd Osland, Mark T. Johnson
  • Patent number: 7564433
    Abstract: An active matrix display device uses an amorphous silicon drive transistor for driving a current through an LED display element. First and second capacitors are connected in series between the gate and source of the drive transistor, with a data input to the pixel provided to the junction between the first and second capacitors. The second capacitor is charged to a pixel data voltage, and a drive transistor threshold voltage is stored on the first capacitor. This pixel arrangement enables a threshold voltage to be stored on the first capacitor, and this can be done each time the pixel is addressed, thereby compensating for age-related changes in the threshold voltage.
    Type: Grant
    Filed: January 20, 2004
    Date of Patent: July 21, 2009
    Assignee: Koninklijke Philips Electronics N.V.
    Inventors: Jason R. Hector, Mark J. Childs, David A. Fish, Mark T. Johnson
  • Patent number: 7559422
    Abstract: A modular link or link section for use in forming a rodless conveyor belt or a section thereof is provided. In one embodiment, the link section is unitary and includes a plurality of laterally-repeating link-shaped portions, each including an apex portion and a pair of leg portions. Each apex portion includes a receiver for receiving an integral first connector extending between the leg portions of a next-adjacent link or link section, preferably in snap-fit engagement, such that relative pivoting movement is established. A second integral connector may be provided between the leg portion of each adjacent apex portion to create an engagement surface for a tooth of a drive or idler sprocket. The underside surface of each link section may also be specially contoured or curved to facilitate smooth passage over a guide structure, such as a small diameter, cylindrical nosebar or the like.
    Type: Grant
    Filed: August 15, 2007
    Date of Patent: July 14, 2009
    Assignee: Span Tech LLC
    Inventors: James L. Layne, Otto Jorgen Draebel, Mark T. Johnson, Michael D. McDaniel
  • Publication number: 20090153651
    Abstract: The invention relates to a 3 D display. The 3 D display comprises suspended particle devices with a suspension of elongated particles that align at a predetermined angle with incoming light beam. The display will allow information to be separated relevant to the left and right eye. An electronically controllable set of suspended particle devices adjusts the deflection angle of the outcoming light beam.
    Type: Application
    Filed: January 5, 2005
    Publication date: June 18, 2009
    Applicant: KONINKLIJKE PHILIPS ELECTRONIC, N.V.
    Inventors: Nynke A.M. Verhaegh, Dirk K.G. De Boer, Mark T. Johnson, Bas Van Der Heijden