Patents by Inventor Karl Mark Thompson

Karl Mark Thompson 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).

  • Method of calibrating a contact image sensor scan bar in a document scanner
    Patent number: 10401225
    Abstract: A method of calibrating a document scanner contact image sensor scan bar having an LED array to increase LED sensor array output and/or reduce total color scan line cycle time.
    Type: Grant
    Filed: October 2, 2017
    Date of Patent: September 3, 2019
    Assignee: LEXMARK INTERNATIONAL, INC.
    Inventors: Mark Lane Mayberry, Karl Mark Thompson
  • METHOD OF CALIBRATING A CONTACT IMAGE SENSOR SCAN BAR IN A DOCUMENT SCANNER
    Publication number: 20190101446
    Abstract: A method of calibrating a document scanner contact image sensor scan bar having an LED array to increase LED sensor array output and/or reduce total color scan line cycle time.
    Type: Application
    Filed: October 2, 2017
    Publication date: April 4, 2019
    Inventors: MARK LANE MAYBERRY, KARL MARK THOMPSON
  • Method and apparatus for scanning an image
    Patent number: 9444964
    Abstract: A method for reducing electromagnetic emissions by an image scanner comprises cyclically dithering a frequency of a clock signal of the image scanner by repeated dither cycles, determining a phase of the dither cycle when a scan pass of a page of a document commences; and commencing all subsequent scan passes of the page of the document at a particular phase shift from the determined phase of the dither cycle.
    Type: Grant
    Filed: March 16, 2015
    Date of Patent: September 13, 2016
    Assignees: Marvell International Ltd., Lexmark International, Inc.
    Inventors: Bennett Fornal, Douglas Gene Keithley, Zachary Nathan Fister, Keith Bryan Hardin, Karl Mark Thompson, Mark Lane Mayberry, Joseph K. Yackzan, Christopher Wilson Case
  • Method for adjusting a controller of a scanner
    Patent number: 7817315
    Abstract: A method for adjusting a controller of a scanner includes obtaining a scan of a predefined image. The method further includes moving the sensor-element signals of the control signal pattern generated by the controller earlier in the pattern by at least one unit and obtaining an additional scan. The obtaining and moving are repeated until a comparison of a latest additional scan to the image is worse than a comparison of a second-latest additional scan to the image. Another method obtains a noise-reducing heuristic which modifies a time parameter of a sensor-element signal. A set of repeated scans of a same scan line is obtained, noise is measured there from, the time parameter is modified by one predetermined unit, and the process repeats until the noise measured from the latest set of repeated scans is worse than that from the second-latest set of repeated scans.
    Type: Grant
    Filed: December 18, 2007
    Date of Patent: October 19, 2010
    Assignee: Lexmark International, Inc.
    Inventors: Chengwu Cui, Mark Lane Mayberry, Karl Mark Thompson
  • Method for Adjusting a Controller of a Scanner
    Publication number: 20090153698
    Abstract: A method for adjusting a controller of a scanner includes obtaining a scan of a predefined image. The method further includes moving the sensor-element signals of the control signal pattern generated by the controller earlier in the pattern by at least one unit and obtaining an additional scan. The obtaining and moving are repeated until a comparison of a latest additional scan to the image is worse than a comparison of a second-latest additional scan to the image. Another method obtains a noise-reducing heuristic which modifies a time parameter of a sensor-element signal. A set of repeated scans of a same scan line is obtained, noise is measured there from, the time parameter is modified by one predetermined unit, and the process repeats until the noise measured from the latest set of repeated scans is worse than that from the second-latest set of repeated scans.
    Type: Application
    Filed: December 18, 2007
    Publication date: June 18, 2009
    Inventors: Chengwu Cui, Mark Lane Mayberry, Karl Mark Thompson