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

Patent metadata

Field	Value
Publication number	US-2023224424-A1
Application number	US-202318095570-A
Country	US
Kind code	A1
Filing date	Jan 11, 2023
Priority date	Jun 24, 2020
Publication date	Jul 13, 2023
Grant date	—

Abstract

A printing apparatus causes a printer engine to print first tone correction patches of a first color on a first sheet and to print second tone correction patches of a second color being different from the first color on a second sheet, generate correction information based on a color measurement result of the first tone correction patches and the second tone correction patches printed on the first sheet and the second sheet, respectively, as measured by a sensor, and correct image data using the correction information. In the generation of the correction information, in a case where there are more than a predetermined number of sheets of a size being different from a predetermined size between the first sheet and the second sheet, the correction information using the color measurement result of the first tone correction patches and the second tone correction patches is not generated.

First claim

1 - 13 . (canceled)

14 . 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; one or more controllers including one or more processors and one or more memories, one or more controllers configured to:
cause the printer engine to print first tone correction patches of a first color on a predetermined size of a first sheet and to print second tone correction patches of a second color being different from the first color on a predetermined size of a second sheet;
generate correction information based on a color measurement result of the first tone correction patches and the second tone correction patches printed on the first sheet and the second sheet, respectively, as measured by the sensor; and
correct image data using the correction information,
wherein, in the generation of the correction information, in a case where there are more than a predetermined number of sheets of a size being different from the predetermined size between the first sheet and the second sheet, the one or more controllers do not generate the correction information using the color measurement result of the first tone correction patches and the second tone correction patches.

15 . The printing apparatus according to claim 14 , wherein, in the generation of the correction information, in a case where there are not more than the predetermined number of sheets of a size being different from the predetermined size between the first sheet and the second sheet, the one or more controllers generate the correction information using the color measurement result of the first tone correction patches and the second tone correction patches.

16 . The printing apparatus according to claim 14 , wherein the predetermined size is A4 size.

17 . The printing apparatus according to claim 14 , wherein the size being different from the predetermined size is A3 size.

18 . The printing apparatus according to claim 14 , wherein the one or more controllers further cause the printer engine to print third tone correction patches of a third color on the first sheet and to print fourth tone correction patches of a fourth color on the second sheet.

19 . The printing apparatus according to claim 14 , wherein, in the generation of the correction information, in a case where there are a number of sheets between a third sheet and a fourth sheet whose sizes are different from the predetermined size, the one or more controllers generate the correction information regardless of the number of sheets.

20 . The printing apparatus according to claim 14 , where the tone correction patches are printed on sheets of a plurality of sizes.

21 . The printing apparatus according to claim 14 , where the plurality of sizes include A4 size and A3 size.

22 . A method of controlling a printing apparatus having 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 method comprising:
causing the printer engine to print first tone correction patches of a first color on a predetermined size of a first sheet and to print second tone correction patches of a second color being different from the first color on a predetermined size of a second sheet; generating correction information based on a color measurement result of the first tone correction patches and the second tone correction patches printed on the first sheet and the second sheet, respectively, as measured by the sensor; and correcting image data using the correction information, wherein, in the generation of the correction information, in a case where there are more than a predetermined number of sheets of a size being different from the predetermined size between the first sheet and the second sheet, the correction information is not generated using the color measurement result of the first tone correction patches and the second tone correction patches.

23 . The method of controlling the printing apparatus according to claim 22 , wherein, in the generation of the correction information, in a case where there are not more than the predetermined number of sheets of the size being different from the predetermined size between the first sheet and the second sheet, the correction information is generated using the color measurement result of the first tone correction patches and the second tone correction patches.

24 . The method of controlling the printing apparatus according to claim 22 , wherein the predetermined size is A4 size.

25 . The method of controlling the printing apparatus according to claim 22 , wherein the size being different from the predetermined size is A3 size.

26 . The method of controlling the printing apparatus according to claim 22 , further comprising:
causing the printer engine to print third tone correction patches of a third color on the first sheet and to print fourth tone correction patches of a fourth color on the second sheet.

27 . The method of controlling the printing apparatus according to claim 22 , wherein, in the generation of the correction information, in a case where there are a number of sheets between a third sheet and a fourth sheet whose sizes are different from the predetermined size, the correction information is generated regardless of the number of sheets.

28 . The method of controlling the printing apparatus according to claim 22 , where the tone correction patches are printed on sheets of a plurality of sizes.

29 . The method of controlling the printing apparatus according to claim 22 , where the plurality of sizes include A4 size and A3 size.

30 . A non-transitory computer-readable storage medium storing a program for causing a processor to execute a method of controlling a printing apparatus having 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 method comprising:
causing the printer engine to print first tone correction patches of a first color on a predetermined size of a first sheet and to print second tone correction patches of a second color being different from the first color on a predetermined size of the second sheet; generating correction information based on a color measurement result of the first tone correction patches and the second tone correction patches printed on the first sheet and the second sheet, respectively, as measured by the sensor; and correcting image data using the correction information, wherein, in the generation of the correction information, in a case where there are more than a predetermined number of sheets of a size being different from the predetermined size between the first sheet and the second sheet, the correction information is not generated using the color measurement result of the first tone correction patches and the second tone correction patches.

Assignees

• Canon Kk

Inventors

• Oba Yoshitaka

Classifications

• G03G15/5062 Primary

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

• H04N1/00708 Primary

  Size or dimensions · CPC title

• H04N1/6044 Primary

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

• 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