US 8,926,039 B2 · Printing device and printing method

Abstract

In a printing device, printing is performed by relatively moving a nozzle array for ejecting a liquid droplet with respect to a print medium, a resolution by a nozzle pitch of the nozzle array is lower than a target print resolution, and between liquid droplets ejected by a single nozzle array, liquid droplets are ejected from the same or another nozzle array to attain the target print resolution. Each of a plurality of nozzles in the single nozzle array is printable by changing an ejection density by applying a preset rate thinning when ejecting liquid droplets by relatively moving with respect to the print medium. The printing device is provided with a print control part configured to perform printing by dividing the single nozzle array into a plurality of nozzle blocks and determining the ejection density in every nozzle blocks.

Claims12

Dependent claims

A printing device in which printing is performed by relatively moving a nozzle array for ejecting a liquid droplet with respect to a print medium, a resolution by a nozzle pitch of the nozzle array is lower than a target print resolution, and between liquid droplets ejected by a single nozzle array, liquid droplets are ejected from the same or another nozzle array to attain the target print resolution,

wherein each of a plurality of nozzles in the single nozzle array is printable by changing an ejection density by applying a preset rate thinning when ejecting liquid droplets by relatively moving with respect to the print medium, and
wherein the printing device is provided with a print control part configured to perform printing by dividing the single nozzle array into a plurality of nozzle blocks and determining the ejection density in every nozzle blocks.

A printing device in which printing is performed by moving a head having a nozzle array for ejecting liquid droplets in a main scanning direction with respect to a print medium and relatively moving the head and the print medium in a sub-scanning direction which is a direction intersecting with the main scanning direction, the printing device comprising:

a control portion configured to divide the nozzle array into a plurality of nozzle blocks and to determine an ejection density in every nozzle blocks,
wherein the control portion is configured to
perform determination of the ejection density in every single scanning of the head in the main scanning direction;
and
after ejecting the liquid droplets at a first ejection density by scanning the head in the main scanning direction, relatively move the head and the print medium in the sub-scanning direction by about a half amount of a nozzle pitch of the single nozzle array, and further scan the head in the sub-scanning direction to eject the liquid droplets at a second ejection density different from the first ejection density.

2 more elements

Dependencies are inferred from the claim text.

Printing device and printing method

Life of this patent

Printing device and printing method

Life of this patent

Abstract

Claims12