Printing apparatus, method of controlling the same, and storage medium

Patent metadata

Field	Value
Publication number	US-2021409574-A1
Application number	US-202117348924-A
Country	US
Kind code	A1
Filing date	Jun 16, 2021
Priority date	Jun 24, 2020
Publication date	Dec 30, 2021
Grant date	—

Abstract

A printing apparatus comprises a printer engine and a sensor that performs color measuring of tone correction patches printed on a sheet, the patches including at least a set of first color tone correction patches and a set of second color tone correction patches. The printing apparatus controls to cause, when the tone correction patches are to be printed on sheets respectively having a predetermined size, the printer engine to print the sets of the first and second color tone correction patches on first and second sheets, respectively, and executes control such that, in a case where the first sheet and the second sheet are printed one after another, a color measurement result of the tone correction patches printed on the first sheet and the second sheet are used in correcting image data for printing.

First claim

What is claimed is:

1 . A printing apparatus comprising:
a printer engine that prints an image on a sheet; a sensor that performs color measuring of tone correction patches printed on a sheet, the patches including at least a set of first color tone correction patches and a set of second color tone correction patches; a controller including at least one processor and at least one memory being configured to cause the printing apparatus to:
correct image data for printing on the basis of a color measurement result obtained by the sensor;
control to cause, in a case where the tone correction patches are to be printed on sheets respectively having a predetermined size, the printer engine to print the set of the first color tone correction patches on a first sheet with the predetermined size and to print the set of the second color tone correction patches on a second sheet with the predetermined size; and
execute control such that, in a case where the first sheet and the second sheet with the predetermined size are printed one after another, a color measurement result of the tone correction patches printed on the first sheet and the second sheet are used in correcting the image data for printing.

2 . The printing apparatus according to claim 1 , wherein in a case where a size of a sheet on which the tone correction patches are printed is a size larger than the predetermined size, the controller causes the printer engine to print sets of the first and second color tone correction patches on the sheet and obtains a color measurement result of the tone correction patches printed on the sheet.

3 . The printing apparatus according to claim 1 , wherein the controller causes the printer engine to print the tone correction patches, in a conveyance direction of the sheet, on the sheet in a margin area on an outer side of an assurance area for printing a user image.

4 . The printing apparatus according to claim 3 , wherein the margin area is provided on two sides of the sheet in a direction orthogonal to the conveyance direction of the sheet.

5 . The printing apparatus according to claim 1 , wherein the controller is further configured to cause the printing apparatus to:
hold initial information of the color measurement result of the tone correction patches obtained by the sensor performing color measuring as reference information associated with a type of the sheet; and in correcting the image data for printing, obtain correction information based on the color measurement result by the sensor and the held reference information associated with the type of the sheet on which the color measuring has been performed, and correct the image data on the basis of the correction information.

6 . The printing apparatus according to claim 5 , wherein the reference information further includes information of a sheet feeder that houses the sheet of the printing apparatus, and
the controller is further configured to cause the printing apparatus to hold the correction information including the information of the sheet feeder and the type of the sheet associated together.

7 . The printing apparatus according to claim 6 , wherein the controller is further configured to cause the printing apparatus to:
receive registration of information of a sheet to a sheet feeder; and in a case where the received information of the sheet includes a change of a type of sheet registered in the sheet feeder and the same type of sheet as the type of sheet registered in the sheet feeder is not registered associated with another sheet feeder, delete the held reference information corresponding to the type of sheet registered in the sheet feeder and the correction information.

8 . The printing apparatus according to claim 1 , wherein the controller is further configured to cause the printing apparatus to:
store, in a memory, whether or not all of the tone correction patches have a sheet size that can be printed on one sheet in association with a type of sheet; and in printing the patches, determine whether or not all of the tone correction patches can be printed on a single sheet by referring to the memory based on the size of the sheet.

9 . The printing apparatus according to claim 1 , wherein the tone correction patches include, for each color able to be printed by the printing apparatus, a plurality of patches divided in terms of density of the color in a predetermined density unit.

10 . The printing apparatus according to claim 1 , wherein in a case where the first sheet and the second sheet with the predetermined size are not printed one after another, the controller does not use a color measurement result of the tone correction patches printed on the first sheet and the second sheet for correcting the image data for printing.

11 . The printing apparatus according to claim 1 , wherein the predetermined size is A4 size.

12 . A method of controlling a printing apparatus including a printer engine that prints an image on a sheet and a sensor that performs color measuring of tone correction patches printed on a sheet, the patches including at least a set of first color tone correction patches and a set of second color tone correction patches, the method comprising:
correcting image data for printing on the basis of a color measurement result obtained by the sensor; controlling to cause, in a case where the tone correction patches are to be printed on sheets respectively having a predetermined size, the printer engine to print the set of the first color tone correction patches on a first sheet with the predetermined size and to print the set of the second color tone correction patches on a second sheet with the predetermined size; and executing control such that, in a case where the first sheet and the second sheet with the predetermined size are printed one after another, a color measurement result of the tone correction patches printed on the first sheet and the second sheet are used in correcting the image data for printing.

13 . A non-transitory computer-readable storage medium storing a program for causing a processor to executed a method of controlling a printing apparatus including a printer engine that prints an image on a sheet and a sensor that performs color measuring of tone correction patches printed on a sheet, the patches including at least a set of first color tone correction patches and a set of second color tone correction patches, the method comprising:
correcting image data for printing on the basis of a color measurement result obtained by the sensor; controlling to cause, in a case where the tone correction patches are to be printed on sheets respectively having a predetermined size, the printer engine to print the set of the first color tone correction patches on a first sheet with the predetermined size and to print the set of the second color tone correction patches on a second sheet with the predetermined size; and executing control such that, in a case where the first sheet and the second sheet with the predetermined size are printed one after another, a color measurement result of the tone correction patches printed on the first sheet and the second sheet are used in correcting the image data for printing.

Assignees

• Canon Kk

Inventors

• Oba Yoshitaka

Classifications

• G03G15/01

  for producing multicoloured copies · CPC title

• B41J2/2132

  Print quality control characterised by dot disposition, e.g. for reducing white stripes or banding (methods for local corrections by dot omission, image edge enhancement, or multi-pass mask selection G06K15/102; colour conversion H04N1/40) · CPC title

• B41J29/393

  Devices for controlling or analysing the entire machine {; Controlling or analysing mechanical parameters involving printing of test patterns} · CPC title

• G03G15/5062 Primary

  by measuring the characteristics of an image on the copy material · CPC title

• H04N1/6044 Primary

  involving a sensor integrated in the machine or otherwise specifically adapted to read the test pattern · CPC title