Printing control apparatus and printing control method

Patent metadata

Field	Value
Publication number	US-12017463-B2
Application number	US-202217981525-A
Country	US
Kind code	B2
Filing date	Nov 7, 2022
Priority date	Nov 12, 2021
Publication date	Jun 25, 2024
Grant date	Jun 25, 2024

Abstract

A printing control apparatus includes a control unit configured to perform control so that a distribution ratio based on which color separation data separated as having a predetermined color is distributed into data for a first nozzle array and a distribution ratio based on which color separation data is distributed into data for a second nozzle array are different depending on a tone value in the color separation data, and a generation unit configured to generate printing data to be used for printing by the first nozzle array based on the distributed data for the first nozzle array and generate printing data to be used for printing by the second nozzle array based on the distributed data for the second nozzle array.

First claim

What is claimed is:

1. A printing control apparatus configured to control a printing apparatus including a first nozzle array having ejection ports configured to eject an ink of a predetermined color and arranged in a sub scanning direction and a second nozzle array having ejection ports configured to eject an ink of the predetermined color and arranged in the sub scanning direction, the printing apparatus printing an image in a predetermined region on a print medium by scanning the first nozzle array and the second nozzle array N times (where N is an integer of 2 or greater) in a main scanning direction intersecting with the sub scanning direction, the printing control apparatus comprising:
a control unit configured to perform control so that a distribution ratio based on which color separation data separated as having the predetermined color is distributed into data for the first nozzle array and a distribution ratio based on which the color separation data is distributed into data for the second nozzle array are different depending on a tone value in the color separation data; and
a generation unit configured to generate printing data to be used for printing by the first nozzle array based on the distributed data for the first nozzle array and generate printing data to be used for printing by the second nozzle array based on the distributed data for the second nozzle array.

2. The printing control apparatus according to claim 1 , wherein
the generation unit generates the printing data for the first nozzle array by allocating a first mask to the distributed data for the first nozzle array and performing mask processing, and
the generation unit generates the printing data for the second nozzle array by allocating a second mask different from the first mask to the distributed data for the second nozzle array and performing mask processing.

3. The printing control apparatus according to claim 2 , wherein
the first mask include mask patterns having an equal printing percentage among scans, and
the second mask includes mask patterns such that a printing percentage for an intermediate scan is relatively higher than a printing percentage for an earlier scan and a later scan.

4. The printing control apparatus according to claim 3 , wherein
in a case where the tone value in the color separation data is the predetermined value or below, the control unit makes the distribution ratio of distribution to the second nozzle array higher than the distribution ratio of distribution to the first nozzle array.

5. The printing control apparatus according to claim 3 , wherein
in a case where the tone value in the color separation data is larger than the predetermined value, the control unit makes the distribution ratio of distribution to the second nozzle array higher than or same as the distribution ratio of distribution to the first nozzle array.

6. The printing control apparatus according to claim 1 , wherein
the printing apparatus includes the first nozzle array and the second nozzle array for each of a plurality of colors, and
the control unit makes a distribution ratio based on which the color separation data is distributed into data for the first nozzle array and data for the second nozzle array different for each of the colors depending on a tone value in the color separation data on the color.

7. The printing control apparatus according to claim 1 , wherein
the ink is a color ink, a reactive liquid, or an overcoat liquid.

8. A printing control method for controlling a printing apparatus including a first nozzle array having ejection ports configured to eject an ink of a predetermined color and arranged in a sub scanning direction and a second nozzle array having ejection ports configured to eject an ink of the predetermined color and arranged in the sub scanning direction, the printing apparatus printing an image in a predetermined region on a print medium by scanning the first nozzle array and the second nozzle array N times (where N is an integer of 2 or greater) in a main scanning direction intersecting with the sub scanning direction, the printing control method comprising:
performing control so that a distribution ratio based on which color separation data separated as having the predetermined color is distributed into data for the first nozzle array and a distribution ratio based on which the color separation data is distributed into data for the second nozzle array are different depending on a tone value in the color separation data; and
generating printing data to be used for printing by the first nozzle array based on the distributed data for the first nozzle array and generating printing data to be used for printing by the second nozzle array based on the distributed data for the second nozzle array.

Assignees

• Canon Kk
• Canon Kabu Shiki Kais Ha

Inventors

• Genta Shin
• Konno Yuji
• Marumoto Yoshitomo
• Baba Naoko
• Jogo Jumpei
• Ushiyama Takayuki
• Shimokodachi Yumi
• Yokokawa Taichi
• Yoshikawa Serena

Classifications

• B41J19/142

  with a reciprocating print head printing in both directions across the paper width · CPC title

• B41J2/512

  Adjustment of the dot disposition by adjustment of the arrangement of the dot printing elements of a print head, e.g. nozzles, needles · CPC title

• B41J11/0021

  using irradiation · CPC title

• B41J2/2054

  by the variation of dot disposition or characteristics, e.g. dot number density, dot shape · CPC title

• B41J19/207

  Encoding along a bar · CPC title