摘要:
In a complimentary printing by bi-directional scanning of a head (1) or by a plurality of heads, a plurality of patterns in which a print start timing is shifted by a predetermined amount are printed with respect to a reference dot, e.g. formed by the forward scan of the bi-directional scanning or by one of the plurality heads (S1). In these patterns, an area factor by the dots formed by printing of the patterns is designed to be varied depending upon shifting amount. An average density is read from each of the plurality of patterns, optically (S2). The timing at which the maximum one among average densities read from the patterns is obtained, can be set as the printing registration condition (S3, S4). Further, a processing including a coarse adjustment (S104, S105, S108) to a fine adjustment (S107, S109) is performed in a series of algorithm. By these processings, printing registration between a forward and a reverse scan of a print head or printing registration between a plurality of print heads in a printing apparatus can be performed simply and with high accuracy, without operating by a user.
摘要:
An ink jet printing apparatus comprising print means having a polarity of ejection outlet arrays each having a plurality of ejection outlets, arranged in a predetermined direction, for ejecting ink, scanning means for scanningly moving the print means relative to the print medium in a main scan direction which is different from the predetermined direction during a printing operation, and means for feeding the print medium relative to the print means in a direction which is different from the main scan direction, wherein an image is formed on the print medium while repeating scanning operation of the scanning means and feeding operation by the feeding means, includes information obtain means for obtaining image information corresponding to at least one of the ejection outlet arrays with respect to a predetermined area of image data to be printed; and selecting means for selecting such a portion in the at least one of ejection outlet arrays as is to effect printing for the image data in the predetermined area, on the basis of the information obtained by the information obtaining means upon image formations.
摘要:
A printing apparatus for forming a color image by applying different color inks to a printing material while bi-directionally moving the recording head to scan the recording material, the apparatus includes changing means for changing an order of applications of the inks to be applied for printing a secondary color to a secondary color pixel area; forming means for forming the secondary color while making the order of applications of the inks to at least one of a plurality of the secondary color pixel areas arranged along a raster scan direction different from the order of another, by the changing means.
摘要:
In a complimentary printing by bi-directional scanning of a head (1) or by a plurality of heads, a plurality of patterns in which a print start timing is shifted by a predetermined amount are printed with respect to a reference dot formed by the forward scan of the bi-directional scanning or by one of the plurality heads (S1). In these patterns, an area factor by the dots formed by printing of the patterns is designed to be varied depending upon shifting amount. An average density is read from each of the plurality of patterns, optically (S2). The timing at which the maximum one among average densities read from the patterns is obtained, can be set as the printing registration condition (S3). Further, before the above reading operation, an optical sensor used for this operation is calibrated, for improving accuracies of the reading and the registrating. By these processings, printing registration between a forward and a reverse scan of a print head or printing registration between a plurality of print heads in a printing apparatus can be performed simply and with high accuracy.
摘要:
The present invention can correct, when a printing position is displaced by an inclination of a printing head for example, the displacement in an easy and effective manner and also allows a user to easily recognize the displacement of the printing position to correct the displacement. To realize this, dots (61, 62) for forming a test pattern are formed by different scannings by a nozzle group including a plurality of nozzles (N176~N192) positioned at one end side of a nozzle row and a nozzle group including a plurality of nozzles (N1~N16) positioned at the other end side of the nozzle row. Depending on displacements of the printing positions of these dots (61, 62), the plurality of nozzles (N1~N192) constituting the nozzle row are divided to a plurality of divided nozzle groups. Then, the printing position is adjusted on the basis of the divided nozzle groups.