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:
Nov. 20, 2007
Filed:
Jun. 30, 2006
Aya Hayashi, Sendai, JP;
Jiro Moriyama, Kawasaki, JP;
Hidehiko Kanda, Yokohama, JP;
Yuji Hamasaki, Kawasaki, JP;
Norihiro Kawatoko, Kawasaki, JP;
Toshiyuki Chikuma, Kawasaki, JP;
Atsushi Sakamoto, Kawasaki, JP;
Aya Hayashi, Sendai, JP;
Jiro Moriyama, Kawasaki, JP;
Hidehiko Kanda, Yokohama, JP;
Yuji Hamasaki, Kawasaki, JP;
Norihiro Kawatoko, Kawasaki, JP;
Toshiyuki Chikuma, Kawasaki, JP;
Atsushi Sakamoto, Kawasaki, JP;
Canon Kabushiki Kaisha, Tokyo, JP;
Abstract
Image deterioration is suppressed as much as possible which is complexly generated by variations of printing positions respectively of printing elements in a printing element row and by displacement of printing positions among printing element rows. To this end, a first adjustment value for adjusting printing positions among a plurality of printing elements included in a printing element row is obtained. Next, printing positions among a plurality of printing elements are adjusted based on the first adjustment value. Then a second adjustment value for adjusting printing positions among not less than two of the printing element rows is obtained. Thereby variations of printing positions in a discharge port row and displacement of printing positions among discharge port rows are properly adjusted in different phases, and adverse effects generated by two kinds of different causes are collectively suppressed.