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. 25, 2020
Filed:
Aug. 01, 2019
Canon Kabushiki Kaisha, Tokyo, JP;
Daisuke Ishii, Fuchu, JP;
Yoshiaki Murayama, Tokyo, JP;
Shigeyasu Nagoshi, Yokohama, JP;
Takeshi Murase, Yokohama, JP;
Satoshi Tada, Kawasaki, JP;
Kenji Kubozono, Kawasaki, JP;
Canon Kabushiki Kaisha, Tokyo, JP;
Abstract
An inkjet printing apparatus obtains data of a second image by correcting, using shading data, signal values of pixels in an image of a read test pattern so that a signal value of a pixel lower than a value of the shading data becomes a value corresponding to a lowest luminance; specifies an area of a pattern of each of the plurality of inks in the image of the test pattern using the data of a first image and the data of the second image; and calculates a position deviation amount of a printhead based on a position of the pattern of the specified area.