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. 02, 2002
Filed:
Jul. 27, 2000
Kazushige Tayuki, Nagano-ken, JP;
Yukimitsu Fujimori, Nagano-ken, JP;
Koichi Otsuki, Nagano-ken, JP;
Seiko Epson Corporation, Tokyo, JP;
Abstract
The invention comprises a printing device wherein a head comprising a plurality of nozzles at a predetermined pitch is used for repeated primary scanning and sub-scanning to print images. The primary and sub-scanning are carried out in such a way as to comply with the following conditions. In the case of printing at a high resolution, dots are first formed during bi-directional operation of the primary scan. Second, the direction in which the dots are formed is aligned for each raster line. Third, a plurality of raster lines formed during operation in the same direction are adjacent to each other. Dots are formed under such conditions to allow the direction in which the dots are formed to be locally aligned. That is, locations with easily discernible shifts in the dots formed during forward travel and the dots formed during return travel can be reduced, allowing the grainy look of images to be improved.