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:
Aug. 26, 2014
Filed:
Jan. 25, 2012
Hideyuki Kido, Isehara, JP;
Hideyuki Kido, Isehara, JP;
Canon Kabushiki Kaisha, Tokyo, JP;
Abstract
Even if an image distortion is generated in an image acquired by reading out a test pattern by a reading device, an analysis region of a pattern for detecting an ejection state of a nozzle is accurately set to determine the ejection state of the nozzle. A control device is provided for controlling the reading device to read out the pattern, and a detecting device is provided to detect a defect of an ejection based upon a distribution state of a density in a pattern in the analysis region. The detecting device corrects a position of the analysis region on the readout image determined based upon an arrangement of each nozzle on a design, corresponding to the distribution state of the density in the pattern in the analysis region.