Printing apparatus and printing method
AssigneeSeiko Epson Corporation
InventorsBunji Ishimoto, Hirokazu Nunokawa
Life of this patent
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Abstract
A correction of density is effectively performed. The printing method includes the following steps. A step of performing correction of density for only a predetermined color, among a plurality of colors, for each dot row region so as to suppress the unevenness in density between rows of dots on a medium formed with the rows of dots arranged along a movement direction by each of the nozzles, when a plurality of the nozzles, that ejects a plurality of colors of different ink and that are arranged along a predetermined direction for each color of ink, ejects ink while being moved in a movement direction that intersects a predetermined direction. A step of printing by ejecting ink while a plurality the nozzles are moved.
Claims7
A printing apparatus comprising:
- (a) a carry section provided with a carry roller for carrying a medium on which an image is to be printed in a carrying direction;
- (b) a nozzle for forming a row of dots on the medium that has been carried by the carry section, by ejecting ink while moving in a movement direction that intersects the carrying direction, based on print data for printing the image;
- (c) a controller for controlling the carry section in order to make
- a portion of the carry roller that contacts the medium when the row of dots, which configures a correction pattern, is formed in a row region at the furthest downstream side in the carrying direction coincide with
- a portion of the carry roller that contacts the medium when the row of dots, which configures an image that is printed based on print data for printing the image, is formed while performing correction based on the correction pattern in the row region at the furthest downstream side in the carrying direction;
- (d) a detection section for detecting a predetermined reference position in the circumferential surface of the carry roller,
- wherein the controller controls the carry section, based on the reference position detected by the detecting section;
- and
- (e) a medium supply section for supplying the medium to the carry section,
- wherein the controller positions the reference position of the carry roller at a predetermined rotation starting position,
- wherein the controller makes the portion of the carry roller that contacts the medium coincide,
- when the row of dots, which configures the correction pattern, is formed in the row region at the furthest downstream side in the carry direction and
- when the row of dots, which configures the image, is formed while performing correction based on the correction pattern in the row region furthest downstream in the carrying direction,
- by making a timing to start rotating the carry roller from the rotation start position coincide with respect to a timing to start supplying the medium by the medium supply section.
Dependencies are inferred from the claim text.