The patent badge is an abbreviated version of the USPTO patent document. The patent badge does contain a link to the full patent document.
The patent badge is an abbreviated version of the USPTO patent document. The patent badge covers the following: Patent number, Date patent was issued, Date patent was filed, Title of the patent, Applicant, Inventor, Assignee, Attorney firm, Primary examiner, Assistant examiner, CPCs, and Abstract. The patent badge does contain a link to the full patent document (in Adobe Acrobat format, aka pdf). To download or print any patent click here.
Patent No.:
Date of Patent:
May. 12, 2015
Filed:
Jun. 22, 2011
Stacy M. Munechika, Fairport, NY (US);
Chung-hui Kuo, Fairport, NY (US);
Hwai-tzuu Tai, Rochester, NY (US);
Stephen J. Famand, Fairport, NY (US);
Stacy M. Munechika, Fairport, NY (US);
Chung-Hui Kuo, Fairport, NY (US);
Hwai-Tzuu Tai, Rochester, NY (US);
Stephen J. Famand, Fairport, NY (US);
Eastman Kodak Company, Rochester, NY (US);
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.