Patents by Inventor STEPHEN J. FAMAND

STEPHEN J. FAMAND 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).

  • Printer nonuniformity compensation for halftone screens
    Patent number: 9030516
    Abstract: Compensation is performed for nonuniformity in a printer. The printer has a photoreceptor and a print head with a plurality of different light sources, each light source capable of producing a plurality of different levels of light. A plurality of stored gain control signals for each light source are related to the light output of that light source. Print job data includes screened pixel levels and a halftone screen specification. The stored gain control signals are adjusted based on the halftone screen specification. The screened pixel levels are modified using the adjusted gain control signals to provide engine pixel levels. Those levels are provided to corresponding light sources to expose the photoreceptor in respective pixel areas with light corresponding to the compensated pixel levels.
    Type: Grant
    Filed: June 22, 2011
    Date of Patent: May 12, 2015
    Assignee: Eastman Kodak Company
    Inventors: Stacy M. Munechika, Chung-Hui Kuo, Hwai-Tzuu Tai, Stephen J. Famand
  • PRINTER NONUNIFORMITY COMPENSATION FOR HALFTONE SCREENS
    Publication number: 20120268544
    Abstract: Compensation is performed for nonuniformity in a printer. The printer has a photoreceptor and a print head with a plurality of different light sources, each light source capable of producing a plurality of different levels of light. A plurality of stored gain control signals for each light source are related to the light output of that light source. Print job data includes screened pixel levels and a halftone screen specification. The stored gain control signals are adjusted based on the halftone screen specification. The screened pixel levels are modified using the adjusted gain control signals to provide engine pixel levels. Those levels are provided to corresponding light sources to expose the photoreceptor in respective pixel areas with light corresponding to the compensated pixel levels.
    Type: Application
    Filed: June 22, 2011
    Publication date: October 25, 2012
    Inventors: STACY M. MUNECHIKA, CHUNG-HUI KUO, HWAI-TZUU TAI, STEPHEN J. FAMAND