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:
Jun. 25, 2002
Filed:
Dec. 22, 1998
Yoshihiko Aihara, Yokohama, JP;
Canon Kabushiki Kaisha, Tokyo, JP;
Abstract
Disclosed are a printing apparatus and method through which high-quality image printing can be performed at all times even if image data is binarized so as to perform pseudo half tone representation and the binarized image is printed by multi-pass printing. The apparatus performs printing in such a manner that the periodicity of a matrix pattern such as a dither matrix for half tone representation and the periodicity of the matrix of a mask pattern, which is used in multi-pass printing, will not coincide. In a case where printing is carried out by a printhead having a plurality of ink discharge nozzles, the printing apparatus is controlled so that printing is performed by assigning a large number of different nozzles to print the same line.