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:
Jul. 08, 2014
Filed:
Jul. 22, 2011
Hirokazu Tanaka, Kawasaki, JP;
Tetsuya Edamura, Inagi, JP;
Toshiyuki Chikuma, Tokyo, JP;
Takatoshi Nakano, Yokohama, JP;
Wakako Yamamoto, Sagamihara, JP;
Kiichiro Takahashi, Yokohama, JP;
Hirokazu Tanaka, Kawasaki, JP;
Tetsuya Edamura, Inagi, JP;
Toshiyuki Chikuma, Tokyo, JP;
Takatoshi Nakano, Yokohama, JP;
Wakako Yamamoto, Sagamihara, JP;
Kiichiro Takahashi, Yokohama, JP;
Canon Kabushiki Kaisha, Tokyo, JP;
Abstract
An ink jet printing apparatus and printing method are provided that can, without the addition of a special structure, suppress density imbalance between the print images formed by ink ejected from each of the ejection ports formed on a print head. As for the plurality of ejection ports, one portion of them are established as multiple impact ejection ports that form multiply impacted pixels at which the number of times ink is impacted at the same area is greater than at other pixels of the print area. And, print control is carried out such that more multiply impacted pixels are printed at print areas printed using ejection ports at the ends of the print head than at print areas printed without using ejection ports at the ends of the print head.