Step offset calibration map printing method, calibration method and related apparatus and equipment

Abstract

This invention discloses a step offset calibration map printing method, calibration method, and related apparatus and equipment, relating to the field of inkjet printing technology. The invention first prints a second calibration map from a first calibration map using the step offset calibration map printing method. Then, it obtains a first step offset calibration value using the step offset calibration method for preliminary step offset calibration with integer (pixel) precision, and obtains a second step offset calibration value for precise step offset calibration with decimal (pixel) precision. Compared to existing solutions that can only perform integer pixel precision calibration, the step offset calibration map printing method and calibration method provided by this invention improve the accuracy of step offset calibration, ensuring the precision of the step distance and improving the accuracy of the step distance, thereby improving image printing accuracy and quality, and is particularly suitable for applications requiring high printing precision.

Description

Technical Field

[0001] This invention relates to the field of inkjet printing technology, and in particular to a step offset calibration pattern printing method, calibration method, and related apparatus and equipment. Background Technology

[0002] Inkjet printing technology refers to the technology of ejecting ink droplets from nozzles on a printhead onto a printing medium to obtain images or text. Reciprocating scanning printing is an important printing method in inkjet printing, which can achieve printing precision beyond that of the printhead itself through stepping and reciprocating scanning. Figure 1 This is a schematic diagram of reciprocating scanning printing. The printhead 1 advances n pixels (height) in the second direction R2, or the printing medium 2 advances n pixels (height) in the R2 direction to enter the first unit area Z1. Here, n is determined according to printing parameters such as the number of scans. Then, the printhead 1 moves along the first direction R1, ejecting ink droplets into the first unit area Z1 during the movement. During this process, the nozzles in area J4 on the printhead 1 eject ink, while the nozzles in areas J3, J2, and J1 do not. After ejection, the printhead 1 advances n pixels (height) again along the second direction R2. Then, the printhead 1 moves in the opposite direction of R1, ejecting ink droplets into the first unit area Z1 and the second unit area Z2 during the movement. During this process, the nozzles in areas J4 and J3 on the printhead 1 eject ink, while the nozzles in areas J2 and J1 do not. After ejection, the printhead 1 advances n pixels (height) again along R2… and so on, until printing is complete. However, due to errors in the motor, drive mechanism, etc., the step distance of the printhead 1 relative to the printing medium 2 is inaccurate, i.e., step offset occurs, which leads to problems such as misalignment of the printed image and affects the image printing quality. Therefore, step offset calibration is required before printing the image. However, existing step offset calibration methods can only obtain step offset calibration values ​​with integer precision (pixels), so they cannot meet the requirements of printing applications that require high step offset calibration accuracy, such as those requiring step offset calibration accuracy to decimals (pixels). Summary of the Invention

[0003] In view of this, embodiments of the present invention provide a step offset calibration map printing method, a calibration method, and related apparatus and equipment to solve the problem of low step offset calibration accuracy in the prior art.

[0004] In a first aspect, embodiments of the present invention provide a method for printing a step offset calibration map, the method comprising:

[0005] Obtain a first calibration map, which includes a first step offset calibration map and a second step offset calibration map. The first step offset calibration map is used to calibrate the integer part of the step offset value, and the second step offset calibration map is used to calibrate the fractional part of the step offset value.

[0006] The first step offset calibration map and the second step offset calibration map are printed on the printing medium to obtain the third step offset calibration map and the fourth step offset calibration map in the second calibration map. The third step offset calibration map and the fourth step offset calibration map are not printed at the same time.

[0007] Preferably, the first step offset calibration map includes a plurality of first step offset sub-calibration maps arranged along a first direction, and the first step offset sub-calibration map includes a first reference part and a first calibration part arranged along the first direction; the second step offset calibration map includes a plurality of second step offset sub-calibration maps arranged along a second direction, and the second step offset calibration map includes a second reference part and a second calibration part arranged along the first direction; the second direction is perpendicular to the first direction.

[0008] Preferably, a first calibration parameter is marked near each of the first step offset sub-calibration maps; and a second calibration parameter is marked near each of the second step offset sub-calibration maps.

[0009] Preferably, the first reference part and the first calibration part each include a plurality of line segments parallel to the first direction, and the projections of each line segment in the second direction are all or partially overlapping.

[0010] Preferably, the second reference part and the second calibration part include a plurality of line segments parallel to the first direction, and the projections of each line segment in the second direction are all or partially overlapping.

[0011] Preferably, both the second reference section and the second calibration section are color blocks.

[0012] Preferably, printing the first calibration map on the printing medium to obtain the second calibration map, wherein the second calibration map includes a third step offset calibration map corresponding to the first step offset calibration map and a fourth step offset calibration map corresponding to the second step offset calibration map, comprising:

[0013] Obtain the first step distance based on the printing parameters;

[0014] Based on the first step distance control nozzle, print the first step offset calibration map in the first calibration map in several passes to obtain the third step offset calibration map in the second calibration map;

[0015] The second step distance of the nozzle is obtained according to the third step offset calibration diagram;

[0016] Based on the second step distance, the nozzle is controlled to print the second step offset calibration map in the first calibration map in several passes, thereby obtaining the fourth step offset calibration map in the second calibration map.

[0017] Preferably, the step of controlling the nozzle to print the first step offset calibration map in the first calibration map in several passes according to the first step distance, and obtaining the third step offset calibration map in the second calibration map, includes:

[0018] Control the nozzle to scan and print the first reference portion of each of the first step offset sub-calibration maps in the first step offset calibration map along the first direction, and obtain the third reference portion of each of the third step offset sub-calibration maps in the corresponding third step offset calibration map;

[0019] After controlling the printhead to move the first step distance relative to the printing medium, the first calibration part of each first step offset sub-calibration map in the first step offset calibration map is printed in reverse along the first direction to obtain the third calibration part of each third step offset sub-calibration map in the corresponding third step offset calibration map.

[0020] Preferably, the step of controlling the printhead to print the second step offset calibration map in the first calibration map in several passes according to the second step distance, to obtain the fourth step offset calibration map in the second calibration map, includes:

[0021] Control the nozzle to scan and print the second reference part of the first second step offset sub-calibration map in the second step offset calibration map along the first direction, and obtain the fourth reference part of the first fourth step offset sub-calibration map in the corresponding fourth step offset calibration map;

[0022] After controlling the printhead to move the second step distance relative to the printing medium, the second calibration part of the first second step offset sub-calibration map in the second step offset calibration map is scanned and printed in the reverse direction along the first direction, so as to obtain the fourth calibration part of the first fourth step offset sub-calibration map in the corresponding fourth step offset calibration map.

[0023] After controlling the printhead to move a specified distance relative to the printing medium, the second reference part of the second second step offset sub-calibration map in the second step offset calibration map is scanned and printed along the first direction to obtain the fourth reference part of the second fourth step offset sub-calibration map in the corresponding fourth step offset calibration map;

[0024] After controlling the printhead to move the second step distance relative to the printing medium, the second calibration part of the second second step offset sub-calibration diagram in the second step offset calibration diagram is scanned and printed in the reverse direction along the first direction, so as to obtain the fourth calibration part of the second fourth step offset sub-calibration diagram in the corresponding fourth step offset calibration diagram.

[0025] This process continues until all the second-step offset sub-calibrations in the second-step offset calibration map are printed, resulting in all the fourth-step offset sub-calibrations in the corresponding fourth-step offset calibration map.

[0026] Secondly, embodiments of the present invention provide a step offset calibration method, the method comprising:

[0027] Obtain a second calibration map as described in the first aspect, the second calibration map including a third step offset calibration map corresponding to the first step offset calibration map and a fourth step offset calibration map corresponding to the second step offset calibration map;

[0028] The first step offset calibration value is obtained based on the third step offset calibration diagram;

[0029] The nozzle is first stepped offset calibration is performed based on the first step offset calibration value;

[0030] The second step offset calibration value is obtained based on the fourth step offset calibration map;

[0031] The nozzle is then subjected to a second step offset calibration based on the second step offset calibration value.

[0032] Preferably, obtaining the first step offset calibration value based on the first step offset calibration map includes:

[0033] Obtain the third step offset calibration map that meets the first preset condition, and denot it as the third reference step offset calibration map;

[0034] The first step offset calibration value is obtained based on the first calibration parameter corresponding to the third reference step offset sub-calibration map.

[0035] Preferably, the first preset condition is: the difference between the starting coordinates of the third reference part and the third calibration part in the second direction in the third step offset sub-calibration diagram is less than or equal to a first preset threshold.

[0036] Preferably, obtaining the second step offset calibration value based on the fourth step offset calibration map includes:

[0037] Obtain the fourth step offset calibration map that meets the second preset condition, and denot it as the fourth reference step offset calibration map;

[0038] The second step offset calibration value is obtained based on the second calibration parameter corresponding to the fourth reference step offset sub-calibration map.

[0039] Preferably, the second preset condition is: the difference between the starting coordinates of the second reference part and the second calibration part in the second step offset sub-calibration diagram in the second direction is less than or equal to the second preset threshold.

[0040] Preferably, after performing a second step offset calibration on the nozzle based on the second step offset calibration value, the method further includes:

[0041] S61: Control the printhead to print the second step offset calibration map to obtain a new fourth step offset calibration map;

[0042] S62: After obtaining the new second step offset calibration value according to the new fourth step offset calibration diagram, perform step offset calibration on the nozzle;

[0043] S63: Repeat steps S61-S62 until the new second step offset calibration value obtained according to the new fourth step offset calibration map is less than or equal to the preset offset threshold.

[0044] Thirdly, embodiments of the present invention provide a step offset calibration map printing apparatus, the apparatus comprising:

[0045] The first calibration map acquisition module is used to acquire a first calibration map, which includes a first step offset calibration map and a second step offset calibration map. The first step offset calibration map is used to calibrate the integer part of the step offset value, and the second step offset calibration map is used to calibrate the fractional part of the step offset value.

[0046] A printing module is used to print the first step offset calibration map and the second step offset calibration map on a printing medium to obtain a third step offset calibration map and a fourth step offset calibration map in the second calibration map, wherein the third step offset calibration map and the fourth step offset calibration map are not printed simultaneously.

[0047] Fourthly, embodiments of the present invention provide a step offset calibration device, the device comprising:

[0048] The second calibration map acquisition module is used to acquire the second calibration map as described in the first aspect, wherein the second calibration map includes a third step offset calibration map corresponding to the first step offset calibration map and a fourth step offset calibration map corresponding to the second step offset calibration map;

[0049] The first calibration value acquisition module is used to acquire the first step offset calibration value according to the third step offset calibration map;

[0050] The first calibration module is used to perform the first step offset calibration on the nozzle according to the first step offset calibration value;

[0051] The second calibration value acquisition module is used to acquire the second step offset calibration value according to the fourth step offset calibration map;

[0052] The second calibration module is used to perform a second step offset calibration on the nozzle based on the second step offset calibration value.

[0053] Fifthly, embodiments of the present invention provide an inkjet printing apparatus, comprising: at least one processor, at least one memory, and computer program instructions stored in the memory, which, when executed by the processor, implement the methods of the first and / or second aspects described above.

[0054] In a sixth aspect, embodiments of the present invention provide a storage medium having computer program instructions stored thereon, which, when executed by a processor, implement the methods of the first and / or second aspects described above.

[0055] In summary, the beneficial effects of the present invention are as follows:

[0056] The step offset calibration map printing method, calibration method, and related apparatus and equipment provided in this invention first obtain a preliminary step offset calibration value with integer (pixel) precision by printing the first step offset calibration map in the first calibration map to obtain a third step offset calibration map in the second calibration map (calibrating the integer part of the step offset value based on the first step offset calibration value). Then, a second step offset calibration value is obtained by printing the second step offset calibration map in the first calibration map to obtain a fourth step offset calibration map in the second calibration map (calibrating the fractional part of the step offset value based on the second step offset value). Compared with existing solutions that can only perform integer (pixel) precision calibration, the step offset calibration map printing method and calibration method provided in this invention can improve the accuracy of step offset calibration, ensure the accuracy of step distance, and improve the accuracy of step distance, thereby improving the image printing accuracy and quality. It is particularly suitable for application scenarios with high printing accuracy requirements. Attached Figure Description

[0057] To more clearly illustrate the technical solutions of the embodiments of the present invention, the drawings used in the embodiments of the present invention will be briefly introduced below. For those skilled in the art, other drawings can be obtained based on these drawings without creative effort, and these are all within the protection scope of the present invention.

[0058] Figure 1 This is a schematic diagram of reciprocating scanning printing and step distance in the background technology.

[0059] Figure 2 This is a schematic flowchart of the step offset calibration map printing method according to an embodiment of the present invention.

[0060] Figure 3a This is a schematic diagram of the first step offset calibration diagram according to an embodiment of the present invention.

[0061] Figure 3b This is a schematic diagram of another step offset calibration diagram according to an embodiment of the present invention.

[0062] Figure 4a This is a schematic diagram of the second step offset calibration map in an embodiment of the present invention.

[0063] Figure 4b This is a schematic diagram of another second step offset calibration map according to an embodiment of the present invention.

[0064] Figure 5a This is a schematic diagram of the first calibration diagram according to an embodiment of the present invention.

[0065] Figure 5b This is a schematic diagram of the first calibration diagram according to an embodiment of the present invention.

[0066] Figure 5c This is a schematic diagram of the first calibration diagram according to an embodiment of the present invention.

[0067] Figure 6a This is a schematic diagram of the third step offset calibration diagram according to an embodiment of the present invention.

[0068] Figure 6b This is a schematic diagram of the third step offset calibration diagram according to an embodiment of the present invention.

[0069] Figure 7a This is a schematic diagram of the fourth step offset calibration diagram of the present invention.

[0070] Figure 7b This is a schematic diagram of another fourth-step offset calibration map of the present invention.

[0071] Figure 8 is a schematic diagram of the second calibration diagram according to an embodiment of the present invention.

[0072] Figure 9 This is a schematic diagram of another second-step offset calibration map according to an embodiment of the present invention.

[0073] Figure 10 This is a schematic diagram of the step offset calibration map printing device according to an embodiment of the present invention.

[0074] Figure 11 This is a schematic diagram of the step offset calibration device according to an embodiment of the present invention.

[0075] Figure 12 This is a schematic diagram of the structure of an inkjet printing device according to an embodiment of the present invention. Detailed Implementation

[0076] The features and exemplary embodiments of various aspects of the present invention will now be described in detail. To make the objectives, technical solutions, and advantages of the present invention clearer, the present invention will be further described in detail below with reference to the accompanying drawings and embodiments. It should be understood that the specific embodiments described herein are only configured to explain the present invention and are not configured to limit the present invention. For those skilled in the art, the present invention can be practiced without some of these specific details. The following description of the embodiments is merely intended to provide a better understanding of the present invention by illustrating examples of the invention.

[0077] It should be noted that, in this document, relational terms such as "first" and "second" are used merely to distinguish one entity or operation from another, and do not necessarily require or imply any such actual relationship or order between these entities or operations. Furthermore, the terms "comprising," "including," or any other variations thereof are intended to cover non-exclusive inclusion, such that a process, method, article, or apparatus that comprises a list of elements includes not only those elements but also other elements not expressly listed, or elements inherent to such a process, method, article, or apparatus. Without further limitations, an element defined by the phrase "comprising..." does not exclude the presence of additional identical elements in the process, method, article, or apparatus that includes said element.

[0078] Example 1

[0079] This invention provides an inkjet printing step offset calibration method, which is applicable to reciprocating scanning printers. The reciprocating scanning printer includes at least one printhead, and the printhead includes at least one row of nozzles. During each print pass, the printhead and the printing medium move relative to each other by a certain distance, which is the step distance.

[0080] Please see Figure 2 The step offset calibration map printing method specifically includes the following steps:

[0081] S1: Obtain a first calibration map, which includes a first step offset calibration map and a second step offset calibration map. The first step offset calibration map is used to calibrate the integer part of the step offset value, and the second step offset calibration map is used to calibrate the fractional part of the step offset value.

[0082] S2: Print the first step offset calibration map and the second step offset calibration map on the printing medium to obtain the third step offset calibration map and the fourth step offset calibration map in the second calibration map. The third step offset calibration map and the fourth step offset calibration map are not printed at the same time.

[0083] Specifically, in this embodiment of the invention, a first step offset calibration map including several first step offset sub-calibration maps is printed to obtain a third step offset calibration map, thereby obtaining the first step offset calibration value for preliminary step offset calibration with integer pixel precision. Then, a second step offset calibration map including several second step offset sub-calibration maps is printed to obtain a fourth step offset calibration map (the third and fourth step offset calibration maps are not printed simultaneously), thereby obtaining the second step offset calibration value for precise step offset calibration with fractional pixel precision.

[0084] The first calibration map here includes a first-step offset calibration map and a second-step offset calibration map. The first-step offset calibration map comprises several first-step offset sub-calibrations arranged along a first direction. For example... Figure 3a As shown, the first step of offset calibration Figure 1 It includes five first-step offset calibrations arranged along the first direction. Figure 10 Preferably, each step offset is calibrated. Figure 10 Below these are labeled the first calibration parameters "-2", "-1", "0", "+1", and "+2". In other embodiments, the first calibration parameter may also be identified in the first step of the offset calibration. Figure 10 Any position above, to the left, or to the right. Calibrate at each first step offset. Figure 10 The first reference section 11 and the first calibration section 12 are arranged along a first direction. The first reference section 11 and the first calibration section 12 each include a plurality of line segments parallel to the first direction. The projections of all line segments in the first reference section 11 in the second direction completely overlap, and the projections of all line segments in the first calibration section 12 in the second direction completely overlap. The second direction is perpendicular to the first direction. In other embodiments, the projections of the line segments in the first reference section 11 and the first calibration section 12 in the second direction may also partially overlap. Furthermore, the first step offset sub-calibration in the first step offset calibration diagram... Figure 10 The number of [variables] can be determined based on actual conditions and is not limited further. Preferably, the number of the first-step offset calibration maps is an odd number greater than or equal to 3. In other embodiments, such as [other embodiments], Figure 3b As shown, the lengths of the line segments of the first reference part 11 and the first calibration part 12 are not the same, and the relative positions of the first reference part 11 and the first calibration part 12 can be determined according to the actual situation and user needs.

[0085] The second step offset calibration map includes several second step offset sub-calibration maps arranged along the second direction. For example... Figure 4a The image shows the second step offset calibration. Figure 2 Schematic diagram. Second step offset calibration. Figure 2The system includes five second step offset calibration maps 20 arranged along a second direction R2. Preferably, each second step offset calibration map 20 has a second calibration parameter marked on one side: "-0.2", "-0.1", "0", "+0.1", or "+0.2". In other embodiments, the second calibration parameter can also be marked at any position above, below, to the left, or to the right of the second step offset calibration map 20. Each second step offset calibration map 20 includes a second reference portion 21 and a second calibration portion 22 arranged along a first direction. The second reference portion 21 and the second calibration portion 22 each include a plurality of line segments parallel to the first direction. The projections of all line segments in the second reference portion 21 in the second direction completely overlap, and the projections of all line segments in the second calibration portion 22 in the second direction completely overlap. In other embodiments, the projections of all line segments in the second reference portion 21 and the second calibration portion 22 in the second direction can also partially overlap. Furthermore, the number of second step offset calibration maps 20 in the second step offset calibration map can be determined according to actual conditions and is not limited again. Preferably, the number of second-step offset sub-calibration maps is an odd number greater than or equal to 3. In other embodiments, such as Figure 4b As shown, both the second reference section 21 and the second calibration section 22 are rectangular color blocks. Users can select appropriate graphics for step offset calibration according to their needs. The above-mentioned line segments and color block graphics are only for illustrative purposes and are not intended to limit the scope of the present invention.

[0086] In some embodiments, such as Figure 5a The image shown is a schematic diagram of the first calibration pattern. Figure 5a In the middle, the first step of offset calibration Figure 1 Located in the second step offset calibration Figure 2 Above, in other embodiments, the first step of offset calibration Figure 1 It can be located in the second step offset calibration Figure 2 The first step is to perform offset calibration at positions such as below, to the left or right, or to the lower right. Figure 1 Second step offset calibration Figure 2 The relative positions can be determined according to the actual situation, and no restrictions are imposed here.

[0087] In some embodiments, such as Figure 5b As shown in 5c, the first calibration diagram includes several second-step offset calibrations. Figure 2 The second-step offset sub-calibration maps at the same position in these second-step offset calibration maps are all identical. In the first detection print containing multiple second-step offset calibration maps... Figure 1 Subsequently, the corresponding second detection map contains multiple fourth step offset calibration maps. The one with the best printing effect can be selected from these identical fourth step offset sub-calibration maps to determine the step offset, thereby ensuring calibration accuracy and precision.

[0088] After obtaining the first calibration map, the first calibration map is printed on the printing medium to obtain the corresponding second calibration map. The second calibration map includes a third step offset calibration map corresponding to the first step offset calibration map and a fourth step offset calibration map corresponding to the second step offset calibration map.

[0089] Preferably, printing the first calibration pattern on the printing medium to obtain the second calibration pattern includes:

[0090] Obtain the first step distance based on the printing parameters;

[0091] Based on the first step distance control nozzle, print the first step offset calibration map in the first calibration map in several passes to obtain the third step offset calibration map in the second calibration map;

[0092] The second step distance of the nozzle is obtained according to the third step offset calibration diagram;

[0093] Based on the second step distance, the nozzle is controlled to print the second step offset calibration map in the first calibration map in several passes, thereby obtaining the fourth step offset calibration map in the second calibration map. Specifically, controlling the nozzle to print the first step offset calibration map in the first calibration map in several passes based on the first step distance, thereby obtaining the third step offset calibration map in the second calibration map, includes:

[0094] Control the nozzle to scan and print the first reference portion of each of the first step offset sub-calibration maps in the first step offset calibration map along the first direction, and obtain the third reference portion of each of the third step offset sub-calibration maps in the corresponding third step offset calibration map;

[0095] After controlling the printhead to move the first step distance relative to the printing medium, the first calibration part of each first step offset sub-calibration map in the first step offset calibration map is printed in reverse along the first direction to obtain the third calibration part of each third step offset sub-calibration map in the corresponding third step offset calibration map.

[0096] When executing a printing task, the printing control software in the host computer provides options such as printing precision, printing mode, and feathering mode for the user to confirm the corresponding printing parameters. Based on the selected printing parameters in printing precision and printing mode, the number of scans (or passes) required to execute the printing task can be determined. Furthermore, since printers now also offer feathering printing, the feathering amplitude is determined based on the selected feathering mode. Combined with the number of scans, the step distance the printhead moves relative to the printing media between each scan (per pass) can be determined. This step distance is uncalibrated and is recorded as the first step distance.

[0097] Specifically, during printing, the printer head is first controlled to scan along the R1 direction (or the direction of R1) to print the first reference part of each first step offset sub-calibration diagram in the first step offset calibration diagram on the printing medium, thereby obtaining the third reference part in each third step offset sub-calibration diagram in the third step offset calibration diagram. Then, the print head is controlled to move the first step distance relative to the printing medium. Next, the print head is controlled to scan along the opposite direction of R1 (or the direction of R1) to print the first calibration part of each first step offset sub-calibration diagram in the first step offset calibration diagram on the printing medium, thereby obtaining the third calibration part in the third step offset sub-calibration diagram in the third step offset calibration diagram. Preferably, the starting coordinates of the printing positions of the first calibration part and the first reference part in the first direction R1 of each first step offset sub-calibration diagram are different, while the starting coordinates of the printing positions of the first calibration part and the first reference part in the first step offset sub-calibration diagram marked "0" are equal in the R2 direction (i.e., in the R2 direction, the starting coordinates of the first calibration part minus the starting coordinates of the first reference part is 0), and the starting coordinates of the printing positions of the first calibration part and the first reference part in the R2 direction of the first step offset sub-calibration diagram marked "+1" differ by +1 pixel (i.e., in the R2 direction...). In the R2 direction, the difference between the starting coordinates of the first calibration part and the starting coordinates of the first reference part is +1 pixel height. In the first step offset calibration diagram marked "+2", the starting coordinates of the first calibration part and the first reference part in the R2 direction differ by +2 pixels. Similarly, in the first step offset calibration diagram marked "-1", the starting coordinates of the first calibration part and the first reference part in the R2 direction differ by -1 pixel, and in the first step offset calibration diagram marked "-2", the starting coordinates of the first calibration part and the first reference part in the R2 direction differ by -2 pixels. Ideally, when the step distance is accurate and there is no offset or error, the printed third step offset calibration diagram will be similar to... Figure 3a The first step of offset calibration is shown. Figure 1 For example, in the first step offset calibration diagram marked "0", the difference between the starting coordinates of the first reference part and the second calibration part in the second direction is 0. If there is a step distance offset, the third step offset calibration diagram in the obtained third calibration diagram may look like this. Figure 6a or Figure 6b As shown. At this point, the first step offset calibration value can be obtained from the printed third step offset calibration map. The first step distance is calibrated according to the first step offset calibration value to obtain the calibrated second step distance. Then, the second step offset calibration map in the first calibration map is printed according to the second step distance.

[0098] Preferably, controlling the printhead to print the second step offset calibration map in the first calibration map in several passes according to the second step distance, to obtain the fourth step offset calibration map in the second calibration map includes:

[0099] Control the nozzle to scan and print the second reference part of the first second step offset sub-calibration map in the second step offset calibration map along the first direction, and obtain the fourth reference part of the first fourth step offset sub-calibration map in the corresponding fourth step offset calibration map;

[0100] After controlling the printhead to move the second step distance relative to the printing medium, the second calibration part of the first second step offset sub-calibration map in the second step offset calibration map is scanned and printed in the reverse direction along the first direction, so as to obtain the fourth calibration part of the first fourth step offset sub-calibration map in the corresponding fourth step offset calibration map.

[0101] After controlling the printhead to move a specified distance relative to the printing medium, the second reference part of the second second step offset sub-calibration map in the second step offset calibration map is scanned and printed along the first direction to obtain the fourth reference part of the second fourth step offset sub-calibration map in the corresponding fourth step offset calibration map;

[0102] After controlling the printhead to move the second step distance relative to the printing medium, the second calibration part of the second second step offset sub-calibration diagram in the second step offset calibration diagram is scanned and printed in the reverse direction along the first direction, so as to obtain the fourth calibration part of the second fourth step offset sub-calibration diagram in the corresponding fourth step offset calibration diagram.

[0103] This process continues until all the second-step offset sub-calibrations in the second-step offset calibration map are printed, resulting in all the fourth-step offset sub-calibrations in the corresponding fourth-step offset calibration map.

[0104] Specifically, unlike the first step offset calibration map which can be printed in 2 passes, each second step offset sub-calibration map in the second step offset calibration map requires 2 passes to print. Specifically, firstly, the printhead is controlled to scan along the R1 direction (or the direction of R1) to print the second reference portion of the first second step offset sub-calibration map in the second step offset calibration map onto the printing medium, thus obtaining the fourth reference portion of the first fourth step offset sub-calibration map in the corresponding fourth step offset calibration map. Next, the printhead is controlled to move a second step distance relative to the printing medium, and then the printhead is controlled to scan in the opposite direction of R1 (or the direction of R1) to print the second calibration portion of the first second step offset sub-calibration map in the second step offset calibration map onto the printing medium, thus obtaining the fourth calibration portion of the first fourth step offset sub-calibration map in the corresponding fourth step offset calibration map. After printing the first second-step offset calibration map, the printhead is controlled to move a specified distance along the R2 direction (this specified distance can be set according to the actual situation). Similarly, the printhead is first controlled to scan along the R1 direction (or the direction of R1) to print the second reference part of the second second-step offset sub-calibration map in the second-step offset calibration map on the printing medium, thereby obtaining the fourth reference part of the second fourth-step offset sub-calibration map in the corresponding fourth-step offset calibration map. Then, the printhead is controlled to move a step distance relative to the printing medium, and then the printhead is controlled to scan in the opposite direction of R1 (or the direction of R1) to print the second calibration part of the second second-step offset sub-calibration map in the second-step offset calibration map on the printing medium, thereby obtaining the fourth calibration part of the second fourth-step offset sub-calibration map in the corresponding fourth-step offset calibration map. This process is repeated until all the second-step offset sub-calibration maps in the second-step offset calibration map are printed, thereby obtaining all the fourth-step offset sub-calibration maps in the fourth-step offset calibration map.

[0105] It is worth noting that during printing, the starting coordinates of the second calibration part and the second reference part in the R2 direction of the second step offset sub-calibration diagram marked "0" must be equal (i.e., in the R2 direction, the starting coordinates of the first calibration part minus the starting coordinates of the first reference part equals 0). The starting coordinates of the second calibration part and the second reference part in the R2 direction of the second step offset sub-calibration diagram marked "+0.1" differ by +0.1 pixels (i.e., the starting coordinates of the second calibration part minus the starting coordinates of the second reference part in the R2 direction equals +0.1 pixels). The starting coordinates of the second calibration part and the second reference part in the R2 direction of the second step offset sub-calibration diagram marked "+0.2" differ by +0.2 pixels. Similarly, the starting coordinates of the second calibration part and the second reference part in the R2 direction of the second step offset sub-calibration diagram marked "-0.1" differ by -0.1 pixels, and the starting coordinates of the second calibration part and the second reference part in the R2 direction of the second step offset sub-calibration diagram marked "-0.2" differ by -0.2 pixels. Ideally, if the step distance is accurate and there is no offset or error, then the printed fourth step offset calibration map will be as follows: Figure 4a Or the second step offset calibration shown in 4b Figure 1 In the second step offset calibration diagram marked "0", the difference between the starting coordinates of the second reference part and the second calibration part in the second direction is 0. If there is a step distance offset, the resulting second step offset calibration diagram will be as follows: Figure 7a or Figure 7b As shown. Based on the printed second step offset calibration map, the second step offset calibration value can be obtained, thereby calibrating the decimal pixel accuracy of the printhead step distance.

[0106] In some embodiments, the final second detection map is as follows: Figure 8a or Figure 8b As shown. It is worth noting that the third step offset calibration diagram 3 in the second detection diagram can be located above, below, to the left, to the right, or to the lower right of the fourth step offset calibration diagram 4, etc. The relative positions of the two can be determined according to the actual situation and are not restricted here.

[0107] In this embodiment of the invention, a first-step offset calibration value is obtained by printing a third step offset calibration map, which includes a plurality of first-step offset sub-calibration maps arranged along a first direction, in order to perform preliminary step offset calibration with integer pixel precision. Then, a second step offset calibration value is obtained by printing a fourth step offset calibration map, which includes a plurality of second-step offset sub-calibration maps arranged along a second direction, in order to perform precise step calibration with fractional pixel precision.

[0108] Example 2

[0109] Based on the above embodiment one, this embodiment of the invention provides a step offset calibration method. The method obtains the corresponding step offset calibration value by acquiring the second calibration map from embodiment one, thereby calibrating the nozzle step distance. Specifically, the method includes:

[0110] S11: Obtain the second calibration map as described in Embodiment 1 above, the second calibration map including the third step offset calibration map and the fourth step offset calibration map;

[0111] S12: Obtain the first step offset calibration value according to the third step offset calibration diagram;

[0112] S13: Perform the first step offset calibration on the nozzle according to the first step offset calibration value;

[0113] S14: Obtain the second step offset calibration value according to the fourth step offset calibration map;

[0114] S15: Perform a second step offset calibration on the nozzle based on the second step offset calibration value.

[0115] Preferably, obtaining the first step offset calibration value based on the third step offset calibration map specifically includes the following steps:

[0116] Obtain the third step offset calibration map that meets the first preset condition, and denot it as the third reference step offset calibration map;

[0117] The first step offset calibration value is obtained based on the first calibration parameter corresponding to the third reference step offset sub-calibration map.

[0118] Preferably, the first preset condition is: the difference between the starting coordinates of the third reference part and the third calibration part in the second direction in the third step offset calibration map is less than or equal to a first preset threshold. This first preset threshold can be set according to actual conditions, such as determining it based on the acceptable step error value in a specific printing task. For example, the first preset threshold is 0.5 pixels. The third step offset calibration map that meets the first preset condition can be obtained directly through human observation, or it can be obtained by acquiring an electronic version of the third step offset calibration map using an image acquisition device such as a scanner or digital camera, and then using machine vision technology.

[0119] exist Figure 6aIn this process, the third step offset sub-calibration map that meets the first preset condition is the third step offset sub-calibration map marked "+2". This third step offset sub-calibration map is denoted as the third reference step offset sub-calibration map, and the first calibration parameter corresponding to the third reference step offset calibration map is "+2". The first step offset calibration value can be obtained based on this first calibration parameter. In some embodiments, if the obtained first calibration value is "+2", the corresponding first step offset calibration value is +2 pixels, indicating that the actual step distance during the next pass of printing is increased by 2 pixels based on the original step distance obtained from the printing parameters. In other embodiments, "+2" can be used to indicate that the step distance is increased by 4 pixels (the corresponding first step offset calibration value is +4 pixels), or increased by 6 pixels (the corresponding first step offset calibration value is +6 pixels)... The specific value can be set according to the actual situation and is not limited here.

[0120] In other embodiments, after obtaining the first step offset calibration value, the step offset calibration can be completed by converting the first step offset calibration value into a gear ratio calibration value for driving the printer stepper motor, and then adjusting the gear ratio of the stepper motor accordingly during the next pass of printing based on the gear ratio calibration value, thereby changing the distance of relative movement between the printhead and the printing medium.

[0121] In other embodiments, after obtaining the first step offset calibration value, the step offset can also be calibrated by adjusting the printing position of the print data. For example, if the obtained first step offset calibration value is "+2", when printing the next pass after the printhead moves the original step distance relative to the printing medium, the printing position of the next pass print data is increased by 2 pixels in height accordingly, thereby completing the step offset calibration.

[0122] Since the first step offset calibration map calibrates the step offset of the printhead with integer pixel precision, the second step distance is obtained after the first step offset calibration value is used to perform the first step distance calibration of the original first step distance of the printhead. The printhead is then controlled to print the second step offset calibration map in several passes according to the second step distance to obtain the fourth step offset calibration map, thereby achieving calibration with fractional pixel precision.

[0123] Preferably, obtaining the second step offset calibration value based on the fourth step offset calibration map specifically includes the following steps:

[0124] Obtain the fourth step offset calibration map that meets the second preset condition, and denot it as the fourth reference step offset calibration map;

[0125] The second step offset calibration value is obtained based on the second calibration parameter corresponding to the fourth reference step offset sub-calibration map.

[0126] Preferably, the second preset condition is: the difference between the starting coordinates of the fourth reference part and the fourth calibration part in the second direction in the fourth step offset calibration map is less than or equal to the second preset threshold. This second preset threshold can be set according to actual conditions, such as determining it based on the acceptable step error value in a specific printing task. For example, the second preset threshold is 0.05 pixels. The fourth step offset calibration map that meets the second preset condition can be obtained directly through human observation, or by acquiring an electronic version of the fourth step offset calibration map using an image acquisition device such as a scanner or digital camera, and then using machine vision technology.

[0127] exist Figure 7a In this process, the fourth step offset sub-calibration map that meets the second preset condition is the fourth step offset sub-calibration map marked "+0.2". This fourth step offset sub-calibration map is denoted as the fourth reference step offset sub-calibration map, and the second calibration parameter corresponding to the fourth reference step offset sub-calibration map is "+0.2". The second step offset calibration value can be obtained based on this second calibration parameter. In some embodiments, "+0.2" indicates that the actual step distance during the next pass of printing is increased by 0.2 pixels based on the original step distance (the second step offset calibration value is +0.2 pixels). In other embodiments, "+0.2" indicates that the step distance is increased by 0.4 pixels (the second step offset calibration value is +0.4 pixels), or by 0.6 pixels (the second step offset calibration value is +0.6 pixels)... The specific value can be set according to the actual situation and is not limited here.

[0128] In other embodiments, after obtaining the second step offset calibration value, the second step offset calibration value can be converted into a gear ratio calibration value for driving the printer stepper motor. Then, based on the gear ratio calibration value, the gear ratio of the stepper motor is adjusted accordingly during the next pass of printing, thereby changing the distance of relative movement between the printhead and the printing medium, and completing the calibration of the step offset with a fractional pixel precision.

[0129] In other embodiments, after obtaining the second step offset calibration value, the step offset can also be calibrated by adjusting the printing position of the print data. For example, if the obtained second step offset calibration value is "+0.2", when printing the next pass after the printhead moves the original step distance relative to the printing medium, the printing position of the next pass print data is increased by 0.2 pixels (height) accordingly, thereby completing the calibration of the step offset with a fractional pixel precision.

[0130] To ensure accurate step distance, after performing a step offset calibration with a fractional pixel precision, the second step offset calibration map is reprinted to obtain a new fourth step offset calibration map. Then, a new second step offset calibration value is obtained based on this new fourth step offset calibration map. This process is repeated until the obtained second step offset calibration value is less than or equal to a preset offset threshold or meets user requirements. The preset offset threshold can be set according to actual conditions (for example, a preset offset threshold of 0.01 pixels), and is not limited here.

[0131] In the above embodiments, the horizontal coordinates of the second reference part and the second calibration part in the second step offset sub-calibration diagram are different in the first direction. In other embodiments, such as Figure 9 As shown, when the second reference section 21 and the second calibration section 22 are both color blocks with the same shape and size, during printing, the horizontal coordinates of the second reference section and the second calibration section in the first direction are the same, and the corresponding printing data (dot matrix data) of the second reference section and the second calibration section are complementary. Based on this, when the second reference section and the second calibration section are printed, the fourth reference section and the fourth calibration section overlap. Therefore, the final printing effect of the two color blocks (the fourth reference section and the fourth calibration section) can be used to determine which fourth step offset sub-calibration map satisfies the second preset condition.

[0132] In summary, the step offset calibration map printing method, calibration method, and related apparatus and equipment provided in this embodiment of the invention first obtain a first step offset calibration value by printing the first step offset calibration map in the first calibration map to obtain a third step offset calibration map in the second calibration map, thereby performing preliminary step offset calibration with integer (pixel) precision (calibrating the integer part of the step offset value based on the first step offset calibration value). Then, the fourth step offset calibration map in the second calibration map is obtained by printing the second step offset calibration map in the first calibration map to obtain a second step offset calibration value, thereby performing precise step offset calibration with decimal (pixel) precision (calibrating the decimal part of the step offset value based on the second step offset value). Compared with existing solutions that can only perform integer (pixel) precision calibration, the step offset calibration map printing method and calibration method provided in this embodiment of the invention can improve the precision of step offset calibration, ensure the accuracy of step distance, and improve the accuracy of step distance, thereby improving the image printing precision and quality, and is particularly suitable for application scenarios with high printing precision requirements.

[0133] Furthermore, a new fourth step offset calibration map can be obtained by iteratively printing the second step offset calibration map to obtain a more accurate second step offset calibration value, thereby achieving more accurate step offset calibration.

[0134] Example 3

[0135] Please see Figure 10 This invention provides a step offset calibration map printing device 200, the device 200 comprising:

[0136] The first calibration map acquisition module 201 is used to acquire a first calibration map, which includes a first step offset calibration map and a second step offset calibration map. The first step offset calibration map is used to calibrate the integer part of the step offset value, and the second step offset calibration map is used to calibrate the fractional part of the step offset value.

[0137] The printing module 202 is used to print the first step offset calibration map and the second step offset calibration map on the printing medium to obtain the third step offset calibration map and the fourth step offset calibration map in the second calibration map, wherein the third step offset calibration map and the fourth step offset calibration map are not printed at the same time.

[0138] Please see Figure 11 This invention also provides a step offset calibration map printing device 400, the device 400 comprising:

[0139] The second calibration map acquisition module 401 is used to acquire the second calibration map as described in Embodiment 1, wherein the second calibration map includes a third step offset calibration map and a fourth step offset calibration map.

[0140] The first calibration value acquisition module 402 is used to acquire the first step offset calibration value according to the third step offset calibration map;

[0141] The first calibration module 403 is used to perform the first step offset calibration on the nozzle according to the first step offset calibration value;

[0142] The second calibration value acquisition module 404 is used to acquire the second step offset calibration value according to the fourth step offset calibration map;

[0143] The second calibration module 405 is used to perform a second step offset calibration on the nozzle based on the second step offset calibration value.

[0144] In summary, the step offset calibration map printing device and step offset calibration device provided in this embodiment of the invention first obtain a first step offset calibration value by printing the first step offset calibration map in the first calibration map to obtain a third step offset calibration map in the second calibration map, thereby performing preliminary step offset calibration with integer (pixel) precision (calibrating the integer part of the step offset value based on the first step offset calibration value). Then, the fourth step offset calibration map in the second calibration map is obtained by printing the second step offset calibration map in the first calibration map to obtain a second step offset calibration value, thereby performing precise step offset calibration with decimal (pixel) precision (calibrating the decimal part of the step offset value based on the second step offset value). Compared with existing solutions that can only perform integer (pixel) precision calibration, the step offset calibration map printing method and calibration method provided in this embodiment of the invention can improve the precision of step offset calibration, ensure the accuracy of step distance and improve the accuracy of step distance, thereby improving the image printing precision and quality, and is particularly suitable for application scenarios with high printing precision requirements.

[0145] Example 4

[0146] Furthermore, the step offset calibration map printing method and calibration method of the present invention can be implemented by an inkjet printing device. Figure 12 A schematic diagram of the hardware structure of an inkjet printing device provided in an embodiment of the present invention is shown.

[0147] Inkjet printing equipment may include a processor 301 and a memory 302 storing computer program instructions.

[0148] Specifically, the processor 301 may include a central processing unit (CPU), an application specific integrated circuit (ASIC), or one or more integrated circuits that can be configured to implement the embodiments of the present invention.

[0149] Memory 302 may include mass storage for data or instructions. For example, and not limitingly, memory 302 may include a hard disk drive (HDD), floppy disk drive, flash memory, optical disk, magneto-optical disk, magnetic tape, or Universal Serial Bus (USB) drive, or a combination of two or more of these. Where appropriate, memory 302 may include removable or non-removable (or fixed) media. Where appropriate, memory 302 may be internal or external to a data processing device. In a particular embodiment, memory 302 is a non-volatile solid-state memory. In a particular embodiment, memory 302 includes read-only memory (ROM). Where appropriate, the ROM may be a mask-programmed ROM, a programmable ROM (PROM), an erasable PROM (EPROM), an electrically erasable PROM (EEPROM), an electrically rewritable ROM (EAROM), or flash memory, or a combination of two or more of these.

[0150] The processor 301 reads and executes computer program instructions stored in the memory 302 to implement any of the inkjet printing step offset calibration methods in the above embodiments.

[0151] In one example, the inkjet printing device may also include a communication interface 303 and a bus 310. Wherein, as Figure 12 As shown, the processor 301, memory 302, and communication interface 303 are connected through bus 310 and complete communication with each other.

[0152] The communication interface 303 is mainly used to realize communication between various modules, devices, units and / or equipment in the embodiments of the present invention.

[0153] Bus 310 includes hardware, software, or both, that couples components of an inkjet printing device together. For example, and not limitingly, bus 310 may include an Accelerated Graphics Port (AGP) or other graphics bus, an Enhanced Industry Standard Architecture (EISA) bus, a Front Side Bus (FSB), HyperTransport (HT) interconnect, an Industry Standard Architecture (ISA) bus, an Infinite Bandwidth Interconnect, a Low Pin Count (LPC) bus, a memory bus, a Microchannel Architecture (MCA) bus, a Peripheral Component Interconnect (PCI) bus, a PCI-Express (PCI-X) bus, a Serial Advanced Technology Attachment (SATA) bus, a Video Electronics Standards Association Local (VLB) bus, or other suitable buses, or combinations of two or more of these. Where appropriate, bus 310 may include one or more buses. While specific buses are described and illustrated in embodiments of the invention, the invention contemplates any suitable bus or interconnect.

[0154] Example 5

[0155] Furthermore, in conjunction with the inkjet printing step offset calibration method in the above embodiments, this invention can be implemented using a computer-readable storage medium. This computer-readable storage medium stores computer program instructions; when these computer program instructions are executed by the processor 301, they implement any one of the step offset calibration map printing methods or calibration methods in the above embodiments.

[0156] In summary, the step offset calibration map printing method, calibration method, and related apparatus and equipment provided in this embodiment of the invention first obtain a first step offset calibration value by printing the first step offset calibration map in the first calibration map to obtain a third step offset calibration map in the second calibration map, thereby performing preliminary step offset calibration with integer (pixel) precision (calibrating the integer part of the step offset value based on the first step offset calibration value). Then, the fourth step offset calibration map in the second calibration map is obtained by printing the second step offset calibration map in the first calibration map to obtain a second step offset calibration value, thereby performing precise step offset calibration with decimal (pixel) precision (calibrating the decimal part of the step offset value based on the second step offset value). Compared with existing solutions that can only perform integer (pixel) precision calibration, the step offset calibration map printing method and calibration method provided in this embodiment of the invention can improve the precision of step offset calibration, ensure the accuracy of step distance, and improve the accuracy of step distance, thereby improving the image printing precision and quality, and is particularly suitable for application scenarios with high printing precision requirements.

[0157] It should be clarified that the present invention is not limited to the specific configurations and processes described above and shown in the figures. For the sake of brevity, detailed descriptions of known methods are omitted here. In the above embodiments, several specific steps are described and shown as examples. However, the method process of the present invention is not limited to the specific steps described and shown. Those skilled in the art can make various changes, modifications, and additions, or change the order of steps, after understanding the spirit of the present invention.

[0158] The functional blocks shown in the above-described structural diagram can be implemented as hardware, software, firmware, or a combination thereof. When implemented in hardware, they can be, for example, electronic circuits, application-specific integrated circuits (ASICs), appropriate firmware, plug-ins, function cards, etc. When implemented in software, the elements of this invention are programs or code segments used to perform the required tasks. The programs or code segments can be stored on a machine-readable medium or transmitted over a transmission medium or communication link via data signals carried in a carrier wave. "Machine-readable medium" can include any medium capable of storing or transmitting information. Examples of machine-readable media include electronic circuits, semiconductor memory devices, ROM, flash memory, erasable ROM (EROM), floppy disks, CD-ROMs, optical disks, hard disks, fiber optic media, radio frequency (RF) links, etc. Code segments can be downloaded via computer networks such as the Internet, intranets, etc.

[0159] It should also be noted that the exemplary embodiments mentioned in this invention describe methods or systems based on a series of steps or apparatus. However, this invention is not limited to the order of the steps described above; that is, the steps can be performed in the order mentioned in the embodiments, or in a different order, or several steps can be performed simultaneously.

[0160] The above description is merely a specific embodiment of the present invention. Those skilled in the art will clearly understand that, for the sake of convenience and brevity, the specific working processes of the systems, modules, and units described above can be referred to the corresponding processes in the foregoing method embodiments, and will not be repeated here. It should be understood that the protection scope of the present invention is not limited thereto. Any person skilled in the art can easily conceive of various equivalent modifications or substitutions within the technical scope disclosed in the present invention, and these modifications or substitutions should all be covered within the protection scope of the present invention.

Claims

1. A method for printing a step offset calibration map, characterized in that, The method includes: A first calibration map is obtained, comprising a first step offset calibration map and a second step offset calibration map. The first step offset calibration map is used to calibrate the integer part of the step offset value, and the second step offset calibration map is used to calibrate the fractional part of the step offset value. The first step offset calibration map comprises a plurality of first step offset sub-calibrations arranged along a first direction, each sub-calibration comprising a first reference portion and a first calibration portion arranged along the first direction. The second step offset calibration map comprises a plurality of second step offset sub-calibrations arranged along a second direction, each sub-calibration comprising a second reference portion and a second calibration portion arranged along the first direction. The second direction is perpendicular to the first direction. Printing the first and second step offset calibration maps on a printing medium yields a third and a fourth step offset calibration map within the second calibration map. The third and fourth step offset calibration maps are not printed simultaneously. Obtain the first step distance based on the printing parameters; The process involves controlling the printhead to print the first step offset calibration map in the first calibration map in several passes according to the first step advance distance, thereby obtaining the third step offset calibration map in the second calibration map. This includes controlling the printhead to scan and print the first reference portion of each of the first step offset sub-calibration maps along a first direction, and after the printhead moves the first step advance distance relative to the printing medium, scanning and printing the first calibration portion of each of the first step offset sub-calibration maps in the reverse direction along the first direction, thereby obtaining the third step offset calibration map. The second step distance of the nozzle is obtained according to the third step offset calibration diagram; The process involves controlling the printhead to print the second step offset calibration map in the first calibration map in several passes according to the second step distance, thereby obtaining the fourth step offset calibration map in the second calibration map. This includes: controlling the printhead to scan and print the second reference part and the second calibration part of each second step offset sub-calibration map along the first direction and its reverse direction according to the second step distance, wherein the printhead is controlled to move a specified distance relative to the printing medium between printing each second step offset sub-calibration map, so that each second step offset sub-calibration map is printed sequentially along the second direction, thereby obtaining the fourth step offset calibration map.

2. The step offset calibration map printing method according to claim 1, characterized in that, Each of the first step offset sub-calibration maps is marked with a first calibration parameter in its vicinity; each of the second step offset sub-calibration maps is marked with a second calibration parameter in its vicinity.

3. The step offset calibration map printing method according to claim 1, characterized in that, The first reference part and the first calibration part each include a plurality of line segments parallel to the first direction, and the projections of each line segment in the second direction are all or partially overlapping.

4. The step offset calibration map printing method according to claim 1, characterized in that, The second reference section and the second calibration section include a plurality of line segments parallel to the first direction, and the projections of each line segment in the second direction are all or partially overlapping.

5. The step offset calibration map printing method according to claim 1, characterized in that, Both the second reference section and the second calibration section are color blocks.

6. The step offset calibration map printing method according to claim 1, characterized in that, The step of controlling the nozzle to print the first step offset calibration map in the first calibration map in several passes according to the first step advance distance, and obtaining the third step offset calibration map in the second calibration map, includes: Control the nozzle to scan and print the first reference portion of each first step offset sub-calibration map in the first step offset calibration map along the first direction, and obtain the third reference portion of each third step offset sub-calibration map in the corresponding third step offset calibration map; After controlling the printhead to move the first step distance relative to the printing medium, the first calibration part of each first step offset sub-calibration map in the first step offset calibration map is printed in reverse along the first direction to obtain the third calibration part of each third step offset sub-calibration map in the corresponding third step offset calibration map.

7. The step offset calibration map printing method according to claim 1, characterized in that, The step of controlling the nozzle to print the second step offset calibration map in the first calibration map in several passes according to the second step distance, to obtain the fourth step offset calibration map in the second calibration map, includes: Control the nozzle to scan and print the second reference part of the first second step offset sub-calibration map in the second step offset calibration map along the first direction, and obtain the fourth reference part of the first fourth step offset sub-calibration map in the corresponding fourth step offset calibration map; After controlling the printhead to move the second step distance relative to the printing medium, the second calibration part of the first second step offset sub-calibration map in the second step offset calibration map is scanned and printed in the reverse direction along the first direction, so as to obtain the fourth calibration part of the first fourth step offset sub-calibration map in the corresponding fourth step offset calibration map. After controlling the printhead to move a specified distance relative to the printing medium, the second reference part of the second second step offset sub-calibration map in the second step offset calibration map is scanned and printed along the first direction to obtain the fourth reference part of the second fourth step offset sub-calibration map in the corresponding fourth step offset calibration map; After controlling the printhead to move the second step distance relative to the printing medium, the second calibration part of the second second step offset sub-calibration diagram in the second step offset calibration diagram is scanned and printed in the reverse direction along the first direction, so as to obtain the fourth calibration part of the second fourth step offset sub-calibration diagram in the corresponding fourth step offset calibration diagram. This process continues until all the second-step offset sub-calibrations in the second-step offset calibration map are printed, resulting in all the fourth-step offset sub-calibrations in the corresponding fourth-step offset calibration map.

8. A step offset calibration method, characterized in that, The method includes: A second calibration map is obtained according to the method of any one of claims 1-7, the second calibration map including a third step offset calibration map corresponding to the first step offset calibration map and a fourth step offset calibration map corresponding to the second step offset calibration map; The first step offset calibration value is obtained based on the third step offset calibration diagram; The nozzle is first stepped offset calibration is performed based on the first step offset calibration value; The second step offset calibration value is obtained based on the fourth step offset calibration map; The nozzle is then subjected to a second step offset calibration based on the second step offset calibration value.

9. The step offset calibration method according to claim 8, characterized in that, The step of obtaining the first step offset calibration value based on the third step offset calibration map includes: Obtain the third step offset calibration map that meets the first preset condition, and denot it as the third reference step offset calibration map; The first step offset calibration value is obtained based on the first calibration parameter corresponding to the third reference step offset sub-calibration map.

10. The step offset calibration method according to claim 9, characterized in that, The first preset condition is: the difference between the starting coordinates of the third reference part and the third calibration part in the second direction in the third step offset sub-calibration diagram is less than or equal to the first preset threshold.

11. The step offset calibration method according to claim 8, characterized in that, The step of obtaining the second step offset calibration value based on the fourth step offset calibration map includes: Obtain the fourth step offset calibration map that meets the second preset condition, and denot it as the fourth reference step offset calibration map; The second step offset calibration value is obtained based on the second calibration parameter corresponding to the fourth reference step offset sub-calibration map.

12. The step offset calibration method according to claim 11, characterized in that, The second preset condition is: the difference between the starting coordinates of the second reference part and the second calibration part in the second direction in the fourth step offset sub-calibration diagram is less than or equal to the second preset threshold.

13. The step offset calibration method according to claim 8, characterized in that, After performing a second step offset calibration on the nozzle based on the second step offset calibration value, the method further includes: S61: Control the printhead to print the second step offset calibration map to obtain a new fourth step offset calibration map; S62: After obtaining the new second step offset calibration value according to the new fourth step offset calibration diagram, perform step offset calibration on the nozzle; S63: Repeat steps S61-S62 until the new second step offset calibration value obtained according to the new fourth step offset calibration map is less than or equal to the preset offset threshold.

14. A step offset calibration map printing device, characterized in that, The device includes: A first calibration map acquisition module is used to acquire a first calibration map, which includes a first step offset calibration map and a second step offset calibration map. The first step offset calibration map is used to calibrate the integer part of the step offset value, and the second step offset calibration map is used to calibrate the fractional part of the step offset value. The first step offset calibration map includes a plurality of first step offset sub-calibrations arranged along a first direction, each sub-calibration including a first reference portion and a first calibration portion arranged along the first direction. The second step offset calibration map includes a plurality of second step offset sub-calibrations arranged along a second direction, each sub-calibration including a second reference portion and a second calibration portion arranged along the first direction. The second direction is perpendicular to the first direction. The printing module is used to print the first step offset calibration map and the second step offset calibration map on a printing medium to obtain a third step offset calibration map and a fourth step offset calibration map in the second calibration map. The third step offset calibration map and the fourth step offset calibration map are not printed simultaneously. The module includes: obtaining a first step distance based on printing parameters; controlling the printhead to print the first step offset calibration map in the first calibration map in several passes according to the first step distance to obtain the third step offset calibration map in the second calibration map, including: controlling the printhead to scan and print the first reference portion of each of the first step offset sub-calibrations along a first direction, and scanning and printing each of the first step offset sub-calibrations in the reverse direction after the printhead moves the first step distance relative to the printing medium. The process involves: first calibration section of the first step offset sub-calibration map to obtain the third step offset calibration map; obtaining the second step distance of the printhead based on the third step offset calibration map; controlling the printhead to print the second step offset calibration map in the first calibration map in several passes based on the second step distance to obtain the fourth step offset calibration map in the second calibration map, including: controlling the printhead to scan and print the second reference section and the second calibration section of each second step offset sub-calibration map along a first direction and its reverse direction based on the second step distance, wherein the printhead is controlled to move a specified distance relative to the printing medium between printing each second step offset sub-calibration map, so that each second step offset calibration map is printed sequentially along the second direction to obtain the fourth step offset calibration map.

15. A step offset calibration device, characterized in that, The device includes: The second calibration map acquisition module is used to acquire a second calibration map according to the method of any one of claims 1-7, wherein the second calibration map includes a third step offset calibration map corresponding to the first step offset calibration map and a fourth step offset calibration map corresponding to the second step offset calibration map; The first calibration value acquisition module is used to acquire the first step offset calibration value according to the third step offset calibration map; The first calibration module is used to perform the first step offset calibration on the nozzle according to the first step offset calibration value; The second calibration value acquisition module is used to acquire the second step offset calibration value according to the fourth step offset calibration map; The second calibration module is used to perform a second step offset calibration on the nozzle based on the second step offset calibration value.

16. An inkjet printing device, characterized in that, include: At least one processor, at least one memory, and computer program instructions stored in the memory, which, when executed by the processor, implement the method as described in any one of claims 1-13.

Images