US 12,459,257 B2
Printing device and printing method
Takuma Hayashi, Nagano (JP)
Assigned to Seiko Epson Corporation, Tokyo (JP)
Filed by SEIKO EPSON CORPORATION, Tokyo (JP)
Filed on Aug. 24, 2023, as Appl. No. 18/454,837.
Claims priority of application No. 2022-134872 (JP), filed on Aug. 26, 2022.
Prior Publication US 2024/0066863 A1, Feb. 29, 2024
Int. Cl. B41J 2/045 (2006.01); B41J 2/155 (2006.01)
CPC B41J 2/04593 (2013.01) [B41J 2/04553 (2013.01); B41J 2/04566 (2013.01); B41J 2/0458 (2013.01); B41J 2/04581 (2013.01); B41J 2/155 (2013.01)] 8 Claims
OG exemplary drawing
 
1. A printing device comprising:
a print head that includes a plurality of nozzles configured to eject ink droplets onto a medium, and that includes a plurality of nozzle arrays in which the nozzles are arranged in a nozzle array direction and
a control section configured to control ejection of the ink droplets from the nozzles, wherein
the print head and the medium relatively move in a relative movement direction different from the nozzle array direction,
the print head includes first nozzle arrays and second nozzle arrays that eject different ink droplets,
a number of the first nozzle arrays and a number of the second nozzle arrays are each two or more,
the plurality of nozzle arrays which eject ink droplets on a same line along the relative movement direction include a first nozzle region in which a distance between the first nozzle array and the second nozzle array in the relative movement direction is a first distance and a second nozzle region in which a distance between the first nozzle array and the second nozzle array in the relative movement direction is a second distance which is longer than the first distance,
the nozzles are configured to form dots of a plurality of sizes on the medium by ejecting ink droplets of a plurality of sizes, and
when a ratio of sizes of a plurality of ink droplets ejected from the nozzles of the first nozzle region is defined as a first ratio and a ratio of sizes of a plurality of ink droplets ejected from the nozzles of the second nozzle region is defined as a second ratio, the control section executes a first print in which a ratio of ink droplets having a size other than a maximum size in the second ratio is smaller than a ratio of ink droplets having a size other than a maximum size in the first ratio.