Liquid ejection device, program and ejection control method

Patent metadata

Field	Value
Publication number	US-2022016916-A1
Application number	US-201917294831-A
Country	US
Kind code	A1
Filing date	Nov 28, 2019
Priority date	Nov 30, 2018
Publication date	Jan 20, 2022
Grant date	—

Abstract

A liquid ejection device includes: a move control unit configured to move any one of a first element and a second element in a main-scanning direction and a sub-scanning direction orthogonal to the main-scanning direction, the first element including a plurality of ejectors to eject active energy ray curable liquid and an active energy ray irradiator, the second element including an object to which the liquid is ejected; and a control unit configured to perform control to cause a first ejector to eject a first ejection amount of liquid, cure the first ejection amount of liquid, cause a second ejector to eject a second ejection amount of liquid onto the cured first ejection amount of liquid, and cure the second ejection amount of liquid. The first ejection amount and the second ejection amount are different from each other.

First claim

1 . A liquid ejection device comprising:
a plurality of ejectors configured to eject active energy ray curable liquid; an active energy ray irradiator configured to emit an active energy ray to the liquid ejected by the plurality of ejectors; a move control unit configured to move any one of a first element and a second element in a main-scanning direction, and move any one of the first element and the second element in a sub-scanning direction orthogonal to the main-scanning direction, the first element including the plurality of ejectors and the active energy ray irradiator, the second element including an object to which the liquid is ejected; and a control unit configured to perform control to cause a first ejector of the plurality of ejectors to eject a first ejection amount of liquid, cure the first ejection amount of liquid, cause a second ejector of the plurality of ejectors to eject a second ejection amount of liquid onto the cured first ejection amount of liquid, and cure the second ejection amount of liquid, wherein the first ejection amount and the second ejection amount are different from each other.

2 . The liquid ejection device according to claim 1 , wherein the control unit is configured to make an ejection amount of liquid to be ejected from the second ejector larger than an ejection amount of liquid to be ejected from the first ejector.

3 . The liquid ejection device according to claim 1 , wherein the control unit is configured to make an ejection amount of liquid to be ejected from the second ejector smaller than an ejection amount of liquid to be ejected from the first ejector.

4 . The liquid ejection device according to claim 2 , wherein the control unit is configured to make a probability with which nozzles corresponding to areas around both ends of the first ejector and the second ejector are used, larger than a probability with which nozzles corresponding to the other area are used.

5 . The liquid ejection device according to claim 1 , wherein the control unit is configured to control an ejection amount of liquid using blue noise characteristics of a mask generation pattern.

6 . The liquid ejection device according to claim 2 , wherein
the liquid comprises clear ink containing no colorant, and the active energy ray irradiator is configured to make an amount of active energy ray to be emitted from the active energy ray irradiator to the clear ink ejected from the first ejector, smaller than an amount of active energy ray to be emitted from the active energy ray irradiator to ink containing a colorant.

7 . The liquid ejection device according to claim 3 , wherein
the liquid comprises clear ink containing no colorant, and the active energy ray irradiator is configured to make an amount of active energy ray to be emitted from the active energy ray irradiator to the clear ink ejected from the second ejector, smaller than an amount of active energy ray to be emitted from the active energy ray irradiator to ink containing a colorant.

8 . The liquid ejection device according to claim 1 , wherein the active energy ray irradiator is divided into a plurality of blocks, is capable of being turned on partially, and is configured to be turned off at a center part of the plurality of blocks in the sub-scanning direction.

9 . The liquid ejection device according to claim 1 , wherein the active energy ray irradiator is divided into a plurality of blocks, is capable of being turned on partially, and is configured to be turned off at a front part to a center part of the plurality of blocks in the sub-scanning direction.

10 . The liquid ejection device according to claim 1 , wherein the active energy ray irradiator is divided into a plurality of blocks, is capable of being turned on partially, and is configured to be turned off at a center part to a back part of the plurality of blocks in the sub-scanning direction.

11 . (canceled)

12 . A program for causing a computer configured to control a liquid ejection device including: a plurality of ejectors configured to eject active energy ray curable liquid; and an active energy ray irradiator configured to emit an active energy ray to the liquid ejected by the plurality of ejectors, to function as:
a move control unit configured to move any one of a first element and a second element in a main-scanning direction, and move any one of the first element and the second element in a sub-scanning direction orthogonal to the main-scanning direction, the first element including the plurality of ejectors and the active energy ray irradiator, the second element including an object to which the liquid is ejected; and a control unit configured to perform control to cause a first ejector of the plurality of ejectors to eject a first ejection amount of liquid, cure the first ejection amount of liquid, cause a second ejector of the plurality of ejectors to eject a second ejection amount of liquid onto the cured first ejection amount of liquid, and cure the second ejection amount of liquid.

13 . An ejection control method for a liquid ejection device including: a plurality of ejectors configured to eject active energy ray curable liquid; and an active energy ray irradiator configured to emit an active energy ray to the liquid that is ejected by the plurality of ejectors, the method comprising:
move control including moving any one of a first element and a second element in a main-scanning direction, and moving any one of the first element and the second element in a sub-scanning direction orthogonal to the main-scanning direction, the first element including the plurality of ejectors and the active energy ray irradiator, the second element including an object to which the liquid is ejected; and performing control to cause a first ejector of the plurality of ejectors to eject a first ejection amount of liquid, cure the first ejection amount of liquid, cause a second ejector of the plurality of ejectors to eject a second ejection amount of liquid onto the cured first ejection amount of liquid, and cure the second ejection amount of liquid.

Assignees

• Saito Yosuke
• Hada Atsushi
• Tsuchiya Yuki
• Mezaki Daisuke
• Ricoh Co Ltd

Inventors

• Saito Yosuke
• Hada Atsushi
• Tsuchiya Yuki
• Mezaki Daisuke

Classifications

• B41J2/2114

  Ejecting specialized liquids, e.g. transparent or processing liquids (B41J2/211 takes precedence) · CPC title

• B41J2/2117

  Ejecting white liquids · CPC title

• B41J25/006 Primary

  for oscillating, e.g. page-width print heads provided with counter-balancing means or shock absorbers · CPC title

• B41J11/00214

  using UV radiation · CPC title

• B41J2/01

  Ink jet · CPC title