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:
Feb. 01, 2011
Filed:
Nov. 09, 2006
Hitoshi Nishikori, Inagi, JP;
Hiroshi Tajika, Yokohama, JP;
Yuji Konno, Kawasaki, JP;
Yoshito Mizoguchi, Kawasaki, JP;
Daisaku Ide, Tokyo, JP;
Takeshi Yazawa, Yokohama, JP;
Satoshi Seki, Kawasaki, JP;
Hirokazu Yoshikawa, Kawasaki, JP;
Hideaki Takamiya, Kawasaki, JP;
Fumiko Yano, Tokyo, JP;
Hitoshi Nishikori, Inagi, JP;
Hiroshi Tajika, Yokohama, JP;
Yuji Konno, Kawasaki, JP;
Yoshito Mizoguchi, Kawasaki, JP;
Daisaku Ide, Tokyo, JP;
Takeshi Yazawa, Yokohama, JP;
Satoshi Seki, Kawasaki, JP;
Hirokazu Yoshikawa, Kawasaki, JP;
Hideaki Takamiya, Kawasaki, JP;
Fumiko Yano, Tokyo, JP;
Canon Kabushiki Kaisha, Tokyo, JP;
Abstract
Mask patterns to be used for multi-pass printing make it possible to make a print with a higher quality at a higher speed. Specifically, by performing a swapping process with adjacency forbiddance, two points in the horizontal direction, or the scanning direction of a printing head, are selected in a buffer in which codes for each scan pass are set depending on printing ratios of a gradation mask. Subsequently, codes are swapped between the two points. By this swap, adjacencies between print permitting areas are eliminated in the mask pattern. As a result, when driving frequencies set for the printing head is kept constant, the scanning speed can be doubled at minimum.