Ink deposition uniformity compensation mechanism

Patent metadata

Field	Value
Publication number	US-12017462-B2
Application number	US-202217685946-A
Country	US
Kind code	B2
Filing date	Mar 3, 2022
Priority date	Feb 27, 2019
Publication date	Jun 25, 2024
Grant date	Jun 25, 2024

Abstract

A printing system is disclosed. The printing system includes at least one physical memory device to store halftone calibration logic and one or more processors coupled with the at least one physical memory device to execute the halftone calibration logic determine an uncalibrated deposition distribution for each of a plurality of pel forming elements, determine a calibrated deposition distribution for each of the plurality of pel forming elements and determine calibration values for each of the plurality of pel forming elements.

First claim

What is claimed is:

1. A system comprising:
at least one physical memory device to store halftone calibration logic; and
one or more processors coupled with the at least one physical memory device to execute the halftone calibration logic to receive measured data for a plurality of pel forming elements, receive a target response comprising a target ink deposition for the plurality of pel forming elements and determine calibration values for each of the plurality of pel forming elements based on average peak ink deposition value data included in the measured data, the target response and total ink deposition comprising an ink sum contributed by each of the plurality of pel forming elements at each of a plurality of locations, wherein the calibration values are implemented by one or more of the plurality of pel forming elements to print image data to a print medium.

2. The system of claim 1 , wherein the measured data corresponds to a first pel forming element and the plurality of pel forming elements adjacent to the first pel forming element.

3. The system of claim 1 , wherein the calibration values for each of the plurality of pel forming elements are included in a calibrated halftone design.

4. The system of claim 3 , wherein the calibrated halftone design comprises a calibrated threshold array.

5. The system of claim 1 , wherein the halftone calibration logic further to generate the total ink deposition based on the measured data and using an ink model.

6. The system of claim 1 , wherein the average peak ink deposition value data comprises average peak ink deposition values for each of the plurality of pel forming elements.

7. The system of claim 1 , wherein the target response is a function of digital count.

8. The system of claim 1 , further comprising a printer.

9. A method comprising:
receiving measured data for a plurality of pel forming elements;
receiving a target response comprising a target ink deposition for the plurality of pel forming elements; and
determining calibration values for each of the plurality of pel forming elements average peak ink deposition value data included in based on the measured data, the target response and total ink deposition comprising an ink sum contributed by each of the plurality of pel forming elements at each of a plurality of locations, wherein the calibration values are implemented by one or more of the plurality of pel forming elements to print image data to a print medium.

10. The method of claim 9 , wherein the measured data corresponds to a first pel forming element and the plurality of pel forming elements adjacent to the first pel forming element.

11. The method of claim 9 , wherein the calibration values for each of the plurality of pel forming elements are included in a calibrated halftone design.

12. The method of claim 11 , wherein the calibrated halftone design comprises a calibrated threshold array.

13. The method of claim 9 , further comprising generating the total ink deposition based on the measured data and using an ink model.

14. The method of claim 9 , wherein the average peak ink deposition value data comprises average peak ink deposition values for each of the plurality of pel forming elements.

15. At least one non-transitory computer readable medium having instructions stored thereon, which when executed by one or more processors, cause the processors to:
receive measured data for a plurality of pel forming elements;
receive a target response comprising a target ink deposition for the plurality of pel forming elements; and
determine calibration values for each of the plurality of pel forming elements based on average peak ink deposition value data included in the measured data, the target response and total ink deposition comprising an ink sum contributed by each of the plurality of pel forming elements at each of a plurality of locations, wherein the calibration values are implemented by one or more of the plurality of pel forming elements to print image data to a print medium.

16. The computer readable medium of claim 15 , wherein the measured data corresponds to a first pel forming element and the plurality of pel forming elements adjacent to the first pel forming element.

17. The computer readable medium of claim 15 , wherein the calibration values for each of the plurality of pel forming elements are included in a calibrated halftone design.

18. The computer readable medium of claim 17 , wherein the calibrated halftone design comprises a calibrated threshold array.

19. The computer readable medium of claim 15 , having instructions stored thereon, which when executed by one or more processors, further cause the processors to generate the total ink deposition based on the measured data and using an ink model.

20. The computer readable medium of claim 15 , wherein the average peak ink deposition value data comprises average peak ink deposition values for each of the plurality of pel forming elements.

Assignees

• Stanich Mikel
• Gurudath Nikita
• Kailey Walter F
• Ernst Larry M
• Ricoh Co Ltd

Inventors

• Stanich Mikel
• Gurudath Nikita
• Kailey Walter F
• Ernst Larry M

Classifications

• H04N1/405

  Halftoning, i.e. converting the picture signal of a continuous-tone original into a corresponding signal showing only two levels · CPC title

• G06K15/105

  Multipass or interlaced printing · CPC title

• B41J2029/3935

  by means of printed test patterns · CPC title

• B41J29/393

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