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. 04, 2010
Filed:
Apr. 21, 2004
Applicants:
Tod S. Heiles, Vancouver, WA (US);
R. Joseph Megaw, Camas, WA (US);
Hsue-yang Liu, Vancouver, WA (US);
Inventors:
Tod S. Heiles, Vancouver, WA (US);
R. Joseph Megaw, Camas, WA (US);
Hsue-Yang Liu, Vancouver, WA (US);
Assignee:
Hewlett-Packard Development Company, L.P., Houston, TX (US);
Attorney:
Primary Examiner:
Assistant Examiner:
Int. Cl.
CPC ...
B41J 29/38 (2006.01); B41J 29/393 (2006.01); G06F 15/00 (2006.01);
U.S. Cl.
CPC ...
Abstract
A method for calibrating one or more printheads includes printing a reference image using a first portion of image forming points of a first printhead, printing a diagnostic image using a second portion of image forming points of either the first printhead or a second printhead, detecting an optical density of the combined reference image and the diagnostic image and determining a compensation value based upon the optical density.