Patents by Inventor Stephen J. Farnand

Stephen J. Farnand 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).

  • Electrophotographic printing with column-dependent tonescale adjustment
    Patent number: 8824907
    Abstract: Electrophotographic (EP) streaking compensation is performed. A tonescale is measured for each column and a per-column gain computed to compensate for variations. An adjustment tonescale is determined and a per-column adjustment-tonescale gain computed to correct for remaining error after the per-column gain is applied. The two corrections are used together to provide improved compensation quality.
    Type: Grant
    Filed: October 10, 2011
    Date of Patent: September 2, 2014
    Assignee: Eatsman Kodak Company
    Inventors: Chung-Hui Kuo, Stephen J. Farnand, Shawn Edward O'Hara, Stacy M. Munechika
  • Adaptive exposure printing and printing system
    Patent number: 8493623
    Abstract: One or more printers or printing systems are connected to a scanning device. Each printer includes one or more color modules that are used during a printing operation. A printer prints a target for each color module or color channel. The printed targets are then scanned by the scanning device. The printed targets may be rotated to any angle and then scanned by the scanning device. The scanned raster data is processed by a controller to detect non-uniformities in at least one density image and to generate one or more correction profiles for the printer. When an image is to be printed, one or more controllers receive the image data and use the one or more correction profiles to correct or compensate for the non-uniformities during the exposure process.
    Type: Grant
    Filed: October 12, 2009
    Date of Patent: July 23, 2013
    Assignee: Eastman Kodak Company
    Inventors: Chung-Hui Kuo, Hwai-Tzuu Tai, Stacy M. Munechika, Cumar Sreekumar, Eric K. Zeise, Stephen J. Farnand, Thomas A. Henderson
  • ELECTROPHOTOGRAPHIC PRINTING WITH COMPENSATION
    Publication number: 20120269527
    Abstract: Electrophotographic (EP) streaking compensation is performed. A tonescale is measured for each column and a per-column gain computed to compensate for variations. An adjustment tonescale is determined and a per-column adjustment-tonescale gain computed to correct for remaining error after the per-column gain is applied. The two corrections are used together to provide improved compensation quality.
    Type: Application
    Filed: October 10, 2011
    Publication date: October 25, 2012
    Inventors: CHUNG-HUI KUO, Stephen J. Farnand, Shawn Edward O'Hara, Stacy M. Munechika
  • ADAPTIVE EXPOSURE PRINTING AND PRINTING SYSTEM
    Publication number: 20100097657
    Abstract: One or more printers or printing systems are connected to a scanning device. Each printer includes one or more color modules that are used during a printing operation. A printer prints a target for each color module or color channel. The printed targets are then scanned by the scanning device. The printed targets may be rotated to any angle and then scanned by the scanning device. The scanned raster data is processed by a controller to detect non-uniformities in at least one density image and to generate one or more correction profiles for the printer. When an image is to be printed, one or more controllers receive the image data and use the one or more correction profiles to correct or compensate for the non-uniformities during the exposure process.
    Type: Application
    Filed: October 12, 2009
    Publication date: April 22, 2010
    Inventors: Chung-Hui Kuo, Hwai-Tzuu Tai, Stacy M. Munechika, Cumar Sreekumar, Eric K. Zeise, Stephen J. Farnand, Thomas A. Henderson
  • Mount for linear lens array
    Patent number: 5274732
    Abstract: An optical assembly for an LED printhead includes a longitudinally extending linear lens array. A stiffener bar is attached to the lens array along a substantial longitudinal dimension of the lens array. A lens mount base plate supports the stiffener bar and a pin and slot connection is provided for permitting thermally induced dimensional change in two dimensions of the stiffener bar relative to the lens mount base plate.
    Type: Grant
    Filed: January 6, 1992
    Date of Patent: December 28, 1993
    Assignee: Eastman Kodak Company
    Inventors: Stephen J. Farnand, Yee S. Ng