Print start position offset value acquisition method, calibration method and device, and apparatus

Abstract

The application discloses a printing starting position offset value acquisition method, a calibration method and devices and equipment thereof, and relates to the field of inkjet printing technology. The method controls an inkjet trolley to print a first reference part and a first calibration part in a first printing starting position calibration graph from a reference printing starting position at different printing speeds, obtains a corresponding second reference part and a second calibration part in a second printing starting position calibration graph, and then acquires printing starting position offset values corresponding to different printing speeds according to the second reference part and the second calibration part. According to the printing starting position offset values, the corresponding printing starting positions of the inkjet trolley at different printing speeds can be adjusted, the actual printing starting positions of each layer are consistent or the ink drop landing positions are consistent when the inkjet trolley prints at different printing speeds, so that the image printing quality is maintained, and the image printing efficiency is ensured.

Description

Technical Field

[0001] This invention relates to the field of inkjet printing technology, and in particular to a method, calibration method, and apparatus / equipment for obtaining the offset value of the printing start position. Background Technology

[0002] In practical printing applications, multi-layer printing is often used to achieve better printing results. For example, a base layer of white ink is applied, followed by colored ink, and then a layer of varnish or hot stamping ink is printed on top. Another example is printing a layer of colored ink, then a layer of white ink (intermediate layer), and then another layer of colored ink. In multi-layer printing, to increase throughput, a higher printing speed is generally used for the inkjet carriage when the base layer (white ink) or intermediate layer doesn't require a specific effect. However, for image layers such as colored ink, varnish, or hot stamping layers, a lower printing speed is used because the printing effect needs to be considered. Throughout the image printing process, the printing speed of the inkjet carriage varies in the printing direction (hereinafter referred to as the X direction) when printing different layers; this is also known as variable speed printing. However, variable speed printing can cause the actual starting positions of the layers in the X direction to become misaligned, thus affecting the final image printing effect and quality. Summary of the Invention

[0003] In view of this, the present invention provides a method, a calibration method and apparatus for obtaining the offset value of the printing start position, in order to solve the problem that the inability of layers to align during variable speed printing affects the image printing effect in the prior art.

[0004] In a first aspect, the present invention provides a method for obtaining a printing start position offset value, the method comprising:

[0005] Obtain a first print start position calibration map, wherein the first print start position calibration map includes at least a first reference part and a first calibration part; the first reference part includes a first preset scale map; the first calibration part includes a first preset graphic;

[0006] Control the inkjet carriage to print the first reference part in the first printing start position calibration diagram from the reference printing start position along the printing direction at the first printing speed, and obtain the second reference part in the second printing start position calibration diagram;

[0007] Control the inkjet carriage to print the first calibration part in the first printing start position calibration diagram from the reference printing start position along the printing direction at the second printing speed, thereby obtaining the second calibration part in the second printing start position calibration diagram;

[0008] The second printing start position offset value corresponding to the second printing speed is obtained based on the second reference unit and the second calibration unit.

[0009] Preferably, the scale of the first preset scale map is in pixels, and the scale number is marked above or below the first preset scale map, wherein the 0 scale line is located in the middle of the first preset scale map.

[0010] Preferably, the first preset shape is any one of a triangle, a rhombus, or a star; the first preset shape is located directly below the 0 mark of the first preset scale diagram.

[0011] Preferably, a line segment perpendicular to the printing direction is provided above the center of the first preset graphic.

[0012] Preferably, obtaining the second printing start position offset value corresponding to the second printing speed based on the second reference unit and the second calibration unit includes:

[0013] Obtain the second preset scale diagram of the second reference section;

[0014] Obtain the second preset pattern from the second calibration unit;

[0015] Obtain the scale value of the second preset graphic located below the second preset scale map;

[0016] The second printing start position offset value is obtained based on the scale value.

[0017] Preferably, obtaining the second printing start position offset value corresponding to the second printing speed based on the second reference unit and the second calibration unit includes:

[0018] The control image acquisition device acquires the second printing start position calibration map to obtain a third printing start position calibration map, the third printing start position calibration map including a third reference part and a third calibration part;

[0019] Identify the third preset scale diagram of the third reference section and the third preset pattern of the third calibration section;

[0020] Obtain the scale value of the third preset graphic located below the third preset scale diagram;

[0021] The second printing start position offset value is obtained based on the scale value.

[0022] Secondly, the present invention provides a method for calibrating the starting position of a print, the method comprising:

[0023] Obtain the second print start position offset value as described in any of the first aspects;

[0024] Obtain the baseline printing start position corresponding to the first printing speed;

[0025] The second printing start position corresponding to the second printing speed is obtained based on the reference printing start position and the offset value of the second printing start position;

[0026] When the inkjet carriage prints along the printing direction at the second printing speed, the inkjet carriage is controlled to start ink ejection and printing at the second printing start position.

[0027] Thirdly, the present invention provides a device for obtaining a printing start position offset value, the device comprising:

[0028] The first print start position calibration map acquisition module is used to acquire a first print start position calibration map, wherein the first print start position calibration map includes at least a first reference part and a first calibration part; the first reference part includes a first preset scale map; the first calibration part includes a first preset graphic.

[0029] The first printing module is used to control the inkjet carriage to print the first reference part in the first printing start position calibration diagram from the reference printing start position along the printing direction at the first printing speed, so as to obtain the second reference part in the second printing start position calibration diagram.

[0030] The second printing module is used to control the inkjet carriage to print the first calibration part in the first printing start position calibration diagram from the reference printing start position along the printing direction at a second printing speed, so as to obtain the second calibration part in the second printing start position calibration diagram.

[0031] The first offset value acquisition module is used to acquire the second printing start position offset value corresponding to the second printing speed based on the second reference part and the second calibration part.

[0032] Fourthly, embodiments of the present invention provide a printing start position calibration device, the device comprising:

[0033] The second offset value acquisition module is used to acquire the second printing start position offset value as described in any one of claims 1-6;

[0034] The reference printing start position acquisition module is used to acquire the reference printing start position corresponding to the first printing speed;

[0035] The second printing start position acquisition module is used to acquire the second printing start position corresponding to the second printing speed based on the reference printing start position and the second printing start position offset value;

[0036] The third printing module is used to control the inkjet carriage to start printing at the second printing start position when the inkjet carriage is printing along the printing direction at the second printing speed.

[0037] Fifthly, the present invention provides a 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 method of the first aspect described above.

[0038] In a sixth aspect, the present invention provides a storage medium having computer program instructions stored thereon, which, when executed by a processor, implement the method of the first aspect described above.

[0039] In summary, the beneficial effects of the present invention are as follows:

[0040] The printing start position offset value acquisition method, calibration method, and apparatus / device provided in this invention control the inkjet carriage to print the first reference part and the first calibration part of the first printing start position calibration diagram at different printing speeds, thereby obtaining the second reference part and the second calibration part of the corresponding second printing start position calibration diagram. Then, the printing start position offset value corresponding to different printing speeds is obtained based on the second reference part and the second calibration part. Based on these printing start position offset values, the printing start position of the inkjet carriage at different printing speeds can be adjusted accordingly to ensure that the actual printing start position of each layer is consistent or the ink droplet landing point position is consistent when the inkjet carriage performs multi-layer printing at different printing speeds, thereby maintaining both image printing quality and image printing efficiency. Attached Figure Description

[0041] 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.

[0042] Figure 1a This is a schematic diagram of the ink droplet landing point position according to an embodiment of the present invention.

[0043] Figure 1b This is a flowchart illustrating the method for obtaining the printing start position offset value according to an embodiment of the present invention.

[0044] Figure 2 This is a schematic diagram of the first printing start position calibration diagram according to an embodiment of the present invention.

[0045] Figure 3 This is a schematic diagram of the first printing start position calibration diagram according to an embodiment of the present invention.

[0046] Figure 4 This is a schematic diagram of the first printing start position calibration diagram according to an embodiment of the present invention.

[0047] Figure 5 This is a schematic diagram of the second printing start position calibration diagram according to an embodiment of the present invention.

[0048] Figure 6 This is a schematic diagram of the first printing start position calibration diagram according to an embodiment of the present invention.

[0049] Figure 7 This is a schematic diagram of the second printing start position calibration diagram according to an embodiment of the present invention.

[0050] Figure 8 This is a schematic diagram of the first printing start position calibration diagram according to an embodiment of the present invention.

[0051] Figure 9 This is a flowchart illustrating the printing start position calibration method according to an embodiment of the present invention.

[0052] Figure 10 This is a schematic diagram of the printing start position offset value acquisition device according to an embodiment of the present invention.

[0053] Figure 11 This is a schematic diagram of the printing start position calibration device according to an embodiment of the present invention.

[0054] Figure 12 This is a schematic diagram of the printing device according to an embodiment of the present invention. Detailed Implementation

[0055] 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.

[0056] It should be noted that in this article, relational terms such as first and second are only used to distinguish one entity or operation from another entity or operation, and do not necessarily require or imply any actual relationship or order between these entities or operations. Moreover, the terms "comprising", "including" or any other variant thereof are intended to cover non-exclusive inclusion, so that a process, method, article or device comprising a series of elements not only includes those elements, but also includes other elements not expressly listed, or also includes elements inherent to such process, method, article or device. Without further limitation, an element defined by the statement "comprising..." does not exclude the presence of additional identical elements in the process, method, article or device comprising said element.

[0057] Embodiment 1

[0058] The embodiment of the present invention provides a method for obtaining a printing start position offset value. This method is applicable to inkjet printing devices, including reciprocating scanning inkjet printing devices, OnePass inkjet printing devices, SinglePass high-speed inkjet printing devices, etc. This inkjet printing device can control the inkjet carriage to move along the printing direction (X direction) at different speeds and eject ink droplets onto the printing medium.

[0059] When the speed of the inkjet carriage moving along the X direction (also known as the printing speed) is different, the landing positions of the ink droplets it ejects on the printing medium are also different. Control the inkjet carriage to move along the X direction at speeds Va, Vb, Vc, and Vh respectively, and start ejecting ink droplets at the set printing start position S0. Due to inertia, the ink droplets will not fall vertically to S0, but will fall on the printing medium in a parabola. The faster the movement speed of the inkjet carriage, the farther the final landing position of the ink droplet is from S0. Therefore, there will be a deviation between the actual printing start position and the set printing start position S0. When Va < Vb < Vc < Vh, as Figure 1a shown, the greater the speed, the farther the corresponding ink droplet landing positions (actual printing start positions) S1, S2, S3, and S4 are from S0. In variable-speed printing, if the printing start position is set to the same value for each printed layer, it will inevitably cause the actual printing start positions of each layer to be inconsistent, resulting in misalignment of each layer and affecting the image quality. Therefore, it is necessary to calibrate the printing start position of the inkjet carriage during variable-speed printing. Different printing speeds start ejecting ink droplets according to different starting printing positions, so that the ink droplet landing positions (actual printing start positions) at the start of printing are consistent.

[0060] In one embodiment, the inkjet carriage is controlled to perform variable-speed printing using printing speeds Va and Vb during the printing process. The offset value of the printing starting position of printing speed Vb relative to printing speed Va can be directly obtained based on the distance between the inkjet carriage and the printing medium, the printing speed Va, and the printing speed Vb. Let the distance between the inkjet carriage and the printing medium, i.e., the printing height, be Hp, and the ink droplet velocity be Vd. With the inkjet carriage stationary, the vertical fall time of the ink droplet from the printhead to the printing medium is calculated as: Td = Hp / Vd. For example, in flatbed advertising inkjet printers, the printing height and waveform are often set to default fixed values, i.e., printing height Hp = 2mm. Given that the ink droplet velocity obtained from the waveform is Vd = 6m / s, the time for the ink droplet to fall from the printhead to the printing medium can be calculated as Td = 0.000333ms. This is the theoretical value when the inkjet carriage is stationary. When the inkjet carriage moves along the X direction, the ink droplets will fall in a parabolic trajectory. When the printing speeds are Va and Vb, the distance difference (offset) d0 between the droplet landing points is: d0 = (Vb - Va) × Td = (Vb - Va) × (Hp / Vd). When the printing height and waveform remain constant, the droplet landing point offset is related to the printing speed. When the printing height and waveform differ, the offset value needs to be considered comprehensively based on the height, waveform, and printing speed.

[0061] Using the printing start position corresponding to printing speed Va as the baseline printing start position, denoted as S0, the printing start position corresponding to the second printing speed should be S0–d0. By controlling the printing device to adjust its printing start position accordingly when printing at different speeds, the actual printing start position of the inkjet carriage is consistent when printing at printing speeds Va and Vb along the X direction, thus ensuring image printing quality. However, this method requires obtaining the ink droplet velocity from the drive waveform, which is not very intuitive or convenient for users. The printing start position offset value acquisition method provided in the following embodiments can conveniently and intuitively obtain the printing start position offset value.

[0062] Please see Figure 1b The method for obtaining the print start position offset value specifically includes the following steps:

[0063] S1: Obtain a first print start position calibration map, wherein the first print start position calibration map includes at least a first reference part and a first calibration part; the first reference part includes a first preset scale map; the first calibration part includes a first preset graphic;

[0064] S2: Control the inkjet carriage to print the first reference part in the first printing start position calibration diagram from the reference printing start position along the printing direction at the first printing speed, so as to obtain the second reference part in the second printing start position calibration diagram;

[0065] S3: Control the inkjet carriage to print the first calibration part in the first printing start position calibration diagram from the reference printing start position along the printing direction at the second printing speed, so as to obtain the second calibration part in the second printing start position calibration diagram;

[0066] S4: Obtain the second printing start position offset value corresponding to the second printing speed based on the second reference part and the second calibration part.

[0067] like Figure 2 As shown, the first printing start position calibration diagram includes a first reference part 11 and a first calibration part 12. The first reference part 11 includes a scale diagram, denoted as a first preset scale diagram. Preferably, each scale unit in the first preset scale diagram is 10 pixels, and scale numbers are marked above or below several scale lines in the first preset scale diagram. For example, as... Figure 3 As shown, the scale value corresponding to the middle scale line is marked as 0. Positive scale values ​​(+200, +400, +600) are marked every 19 scale values ​​along the positive X direction, and negative scale values ​​(-200, -400, -600) are marked every 19 scale values ​​along the negative X direction. A first calibration unit 12 is provided directly below the 0 scale line in the first preset scale diagram. The first calibration unit 12 includes a preset shape, denoted as the first preset shape, which is a triangle, and the upper vertex of the triangle is aligned with the 0 scale line in the first preset scale diagram. In another embodiment, as... Figure 4 As shown, the first preset graphic, in addition to the triangle, also includes a line segment perpendicular to the X-direction at the upper vertex of the triangle. This line segment, together with the upper vertex of the triangle, is used to indicate the position of the first calibration part 12 relative to the first reference part 11. In other embodiments, the first preset graphic can also be a shape such as a rhombus, a square star, a pentagon, or other custom shapes.

[0068] The first print start position calibration diagram is computer-readable data. After the host computer in the printing device obtains the first print start position calibration diagram, it first controls the inkjet carriage in the printing device to eject ink droplets along the X direction at a first printing speed (as a reference printing speed) and start from the set reference print start position, printing the first reference portion of the first print start position calibration diagram on the printing medium, and obtaining the second reference portion of the second print start position calibration diagram. Then, it controls the inkjet carriage to eject ink droplets at the second printing speed from the same reference print start position and print the first calibration portion of the first print start position calibration diagram on the printing medium, and obtaining the second calibration portion of the second print start position calibration diagram. Based on the second reference portion and the second calibration portion of the second print start position calibration diagram, the print start position offset value of the second printing speed relative to the first printing speed can be determined. Based on this offset value and the set reference print start position, the second print start position corresponding to the second printing speed can be obtained.

[0069] For example, the second print start position calibration diagram obtained by printing is as follows: Figure 5 As shown. In Figure 5 In the second calibration diagram 22, the upper vertex of the triangle is aligned with the second scale line to the left of the 0 scale line. This indicates that the offset of the printing start position corresponding to the second printing speed is -20 pixels (each scale mark is 10 pixels). Preferably, the 20-pixel distance is converted to a millimeter value d1 (mm), and set as X mm as the reference printing start position for the first printing speed. Therefore, in actual printing, the second printing start position set for the second printing speed should be (X-d1) mm.

[0070] In other embodiments, it is necessary to calibrate N printing start positions corresponding to different printing speeds, where N is a natural number greater than or equal to 1. Accordingly, the first printing start position calibration diagram includes N first reference sections and N first calibration sections. For example, the first printing start position calibration diagram is as follows: Figure 6As shown, it includes three first reference parts 11 (denoted as the first first reference part 11-1, the second first reference part 11-2, and the third first reference part 11-3) arranged along the X direction and three first calibration parts 12 (denoted as the first first calibration part 12-1, the second first calibration part 12-2, and the third first calibration part 12-3). When printing this first print start position calibration diagram, the inkjet carriage is first controlled to eject ink droplets along the X direction at a first printing speed from the reference print start position and print the three first reference parts 11 in the first print start position calibration diagram on the printing medium, resulting in three second reference parts 21 in the second print start position calibration diagram (denoted as the first second reference part 21-1, the second second reference part 21-2, and the third second reference part 21-3). Three different printing speeds are designated as the second, third, and fourth printing speeds. Then, the inkjet carriage is controlled to eject ink droplets along the X-axis at the second printing speed from the reference printing start position to print the first first calibration part 12-1, correspondingly obtaining the first second calibration part 22-1. Next, the inkjet carriage is controlled to eject ink droplets along the X-axis at the third printing speed from the reference printing start position to print the second first calibration part 12-2, obtaining the first second calibration part 22-2. Finally, the inkjet carriage is controlled to eject ink droplets along the X-axis at the fourth printing speed from the reference printing start position to print the third first calibration part 12-3, obtaining the third second calibration part 22-3. The final calibration diagram of the second printing start position is shown below. Figure 7 As shown.

[0071] exist Figure 7In the second print start position calibration diagram shown, the upper vertex of the triangle in the first second calibration diagram 22-1 is aligned with the second scale line to the left of the 0 scale line in the first second reference section 21-1. Therefore, the print start position offset value corresponding to the second print speed is -20 pixels (each scale is 10 pixels). Preferably, the 20-pixel distance value is converted to a millimeter value d1 (mm), and set as X mm for the reference print start position set for the first print speed. Then, in actual printing, the third print start position set for the second print speed should be (X-d1) mm. In the second second calibration diagram 22-2, the upper vertex of the triangle is aligned with the third scale line to the right of the 0 scale line in the second second reference section 21-2. Therefore, the print start position offset value corresponding to the third print speed is +30 pixels (each scale is 10 pixels). Preferably, the distance value of 30 pixels is converted to a millimeter value d2 (mm), and set as X mm as the reference printing start position for the first printing speed. Then, in actual printing, the third printing start position set for the third printing speed should be (X+d2) mm. The upper vertex of the triangle in the third second calibration diagram 22-3 is aligned with the fourth scale line to the left of the 0 scale line in the second second reference section 21-3. Therefore, the offset value of the printing start position corresponding to the fourth printing speed is -40 pixels (each scale is 10 pixels). Preferably, the distance value of 40 pixels is converted to a millimeter value d3 (mm), and set as X mm as the reference printing start position for the first printing speed. Then, in actual printing, the fourth printing start position set for the fourth printing speed should be (X-d3) mm. Where d1, d2, and d3 are all positive numbers.

[0072] In another embodiment, such as Figure 8 As shown, the three first reference parts 11 and the first calibration parts 12 can also be arranged along the Y direction. Specific printing methods and offset value acquisition methods are detailed below. Figure 5 The examples described are similar and will not be repeated here. It is worth noting that... Figure 6 and Figure 8 The first print start position calibration diagram shown is for illustrative purposes only and is not intended to limit the scope of the first print start position calibration diagram. The arrangement and position of the several first reference parts and first calibration parts can be determined according to the actual situation, and are not limited to this. Figure 6 or Figure 8 Arranged along the X or Y direction.

[0073] In one embodiment, a third printing start position calibration map (electronic document image) is obtained by acquiring a second printing start position calibration map using an image acquisition device. The third printing start position calibration map includes a third reference part (corresponding to the second reference part) and a third calibration part (corresponding to the second calibration part). Then, image recognition technology is used to identify the third reference part and the third calibration part in the third printing start position calibration map, and the scale value difference between the third preset graphic in the third calibration part and the 0 scale line in the third reference part is obtained, thereby obtaining the printing start position offset value of the second printing speed (or the third printing speed, the fourth printing speed, etc.) relative to the first printing speed.

[0074] After obtaining the offset value of the printing start position corresponding to different printing speeds based on the second printing start position calibration map, the second printing start position (or third printing start position, fourth printing start position) of each inkjet carriage when printing at the second printing speed (or the third printing speed, the fourth printing speed) can be adjusted according to the offset value. This ensures that the actual printing start position of each layer is consistent or the ink droplet landing position is consistent when the inkjet carriage performs multi-layer printing along X at different printing speeds, thus ensuring the image printing quality.

[0075] Example 2

[0076] Based on the above embodiment one, this invention provides a method for calibrating the starting position of a print. Please refer to [link to relevant documentation]. Figure 9 The method includes:

[0077] S5: Obtain the offset value of the second printing start position;

[0078] S6: Obtain the baseline printing start position corresponding to the first printing speed;

[0079] S7: Obtain the second printing start position corresponding to the second printing speed based on the reference printing start position and the second printing start position offset value;

[0080] S8: When the inkjet carriage is printing along the printing direction at the second printing speed, control the inkjet carriage to start ink ejection and printing at the second printing start position.

[0081] Specifically, according to the printing start position offset value acquisition method described in Embodiment 1, the second printing start position offset value is -d1. The reference printing start position corresponding to the first printing speed is X. Therefore, during actual printing, the second printing start position set for the second printing speed should be: X-d1. Similarly, when multiple printing start positions corresponding to different printing speeds need to be calibrated, such as the third and fourth printing speeds, according to the printing start position offset value acquisition method described in Embodiment 1, the third and fourth printing start position offset values ​​corresponding to the third and fourth printing speeds are +d2 and -d3 respectively. The reference printing start position corresponding to the first printing speed is X. Therefore, during actual printing, the third printing start position set for the third printing speed should be: X+d2. The fourth printing start position set for the fourth printing speed should be: X-d3. (d1, d2, and d3 are all positive numbers.)

[0082] Furthermore, it is worth pointing out that, Figure 5 , Figure 7 The examples shown are calibration diagrams of the second print start position obtained by the inkjet carriage moving along the X direction and ejecting ink droplets. In a reciprocating scanning inkjet printer, the inkjet carriage can reciprocate along the X direction and in the opposite direction to eject ink. When the inkjet carriage starts moving in the opposite direction of the X direction to eject ink, the print start position of the inkjet carriage at the first print speed is (X+F), where X is the reference print start position and F is the print width. The print start position at the second print speed is X+F+d1 (the second print speed is greater than the first print speed, and when printing starts along the X direction, the print start position at the second print speed should be earlier than the print start position at the first print speed). Similarly, when calibrating the print start positions at the third and fourth print speeds, the print start position at the third print speed is (X+F-d2), and the print start position at the fourth print speed is (X+F+d3).

[0083] In one embodiment, the print start position offset values ​​(pixel values) corresponding to the second, third, and fourth print speeds are obtained based on the obtained second start position calibration map. These print start position offset values ​​are input to the printing device through the human-machine interface of the printing device's host computer. The printing device converts these print start position offset values ​​into millimeter values ​​and automatically adjusts its print start position when printing at the corresponding print speed. Let the start position offset values ​​corresponding to the first, second, third, and fourth print speeds be Adj_1, Adj_2, Adj_3, and Adj_4, respectively. Taking the first print speed as the base print speed and its corresponding print start position as the base print start position, the values ​​of Adj_1, Adj_2, Adj_3, and Adj_4 input to the human-machine interface are 0, -20, +30, and -40, respectively. When the inkjet carriage is controlled to print at the first, second, third, and fourth printing speeds respectively, the printing start position is automatically adjusted according to the input printing start position offset value corresponding to each printing speed. This ensures that the actual printing start position of each layer is consistent and the ink droplet landing position is consistent when the inkjet carriage prints multiple layers at different printing speeds, thus ensuring the image printing quality.

[0084] Example 3

[0085] Please see Figure 10 This invention provides a printing start position offset value acquisition device 200, the device 200 comprising:

[0086] The first printing start position calibration map acquisition module 201 is used to acquire a first printing start position calibration map, wherein the first printing start position calibration map includes at least a first reference part and a first calibration part; the first reference part includes a first preset scale map; the first calibration part includes a first preset graphic.

[0087] The first printing module 202 is used to control the inkjet carriage to print the first reference part of the first printing start position calibration diagram from the reference printing start position along the printing direction at a first printing speed, so as to obtain the second reference part of the second printing start position calibration diagram.

[0088] The second printing module 203 is used to control the inkjet carriage to print the first calibration part of the first printing start position calibration diagram from the reference printing start position along the printing direction at a second printing speed, so as to obtain the second calibration part of the second printing start position calibration diagram.

[0089] The first offset value acquisition module 204 is used to acquire the second printing start position offset value corresponding to the second printing speed based on the second reference part and the second calibration part.

[0090] In summary, the printing start position offset value acquisition device provided in this embodiment of the invention controls the inkjet carriage to print the first reference part and the first calibration part in the first printing start position calibration diagram at different printing speeds, thereby obtaining the second reference part and the second calibration part in the corresponding second printing start position calibration diagram. Then, based on the second reference part and the second calibration part, the printing start position offset value corresponding to different printing speeds is obtained. Based on these printing start position offset values, the printing start position of the inkjet carriage at different printing speeds can be adjusted accordingly, ensuring that the actual printing start position of each layer is consistent or the ink droplet landing point position is consistent when the inkjet carriage performs multi-layer printing at different printing speeds. This maintains both image printing quality and image printing efficiency.

[0091] Example 4

[0092] Please see Figure 11 This invention provides a printing start position calibration device 400, the device 400 comprising:

[0093] The second offset value acquisition module 401 is used to acquire the second printing start position offset value as described in any one of claims 1-6;

[0094] The reference printing start position acquisition module 402 is used to acquire the reference printing start position corresponding to the first printing speed;

[0095] The second printing start position acquisition module 403 is used to acquire the second printing start position corresponding to the second printing speed based on the reference printing start position and the second printing start position offset value.

[0096] The third printing module 404 is used to control the inkjet carriage to start printing at the second printing start position when the inkjet carriage is printing along the printing direction at the second printing speed.

[0097] In summary, the printing start position offset value acquisition device provided in this embodiment of the invention can adjust the printing start position of the inkjet carriage at different printing speeds according to the printing start position offset value, so as to ensure that the actual printing start position of each layer or the ink droplet landing position is consistent when the inkjet carriage performs multi-layer printing at different printing speeds, thereby maintaining both image printing quality and image printing efficiency.

[0098] Example 3

[0099] In addition, the method for obtaining the printing start position offset value in this embodiment of the invention can be implemented by a printing device. Figure 12 A schematic diagram of the hardware structure of the printing device provided in an embodiment of the present invention is shown.

[0100] The printing device may include a processor 301 and a memory 302 storing computer program instructions.

[0101] 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.

[0102] 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.

[0103] The processor 301 reads and executes computer program instructions stored in the memory 302 to implement any of the printing start position offset value acquisition methods and calibration methods in the above embodiments.

[0104] In one example, the printing device may also include a communication interface 303 and a bus 310. For example, Figure 12 As shown, the processor 301, memory 302, and communication interface 303 are connected through bus 310 and complete communication with each other.

[0105] 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.

[0106] Bus 310 includes hardware, software, or both, that couples components of a printing device together. For example, and not as a limitation, 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.

[0107] Example 4

[0108] Furthermore, in conjunction with the printing start position offset value acquisition method and 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 of the printing start position offset value acquisition methods in the above embodiments.

[0109] 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.

[0110] 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.

[0111] 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.

[0112] 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 obtaining the offset value of the printing start position, characterized in that, The method includes: Obtain a first print start position calibration map, wherein the first print start position calibration map includes at least a first reference part and a first calibration part; the first reference part includes a first preset scale map; the first calibration part includes a first preset graphic; Control the inkjet carriage to print the first reference part in the first print start position calibration diagram from the reference print start position along the printing direction at the first printing speed, and obtain the second reference part in the second print start position calibration diagram; Control the inkjet carriage to print the first calibration part in the first printing start position calibration diagram from the reference printing start position along the printing direction at the second printing speed, thereby obtaining the second calibration part in the second printing start position calibration diagram; The second printing start position offset value corresponding to the second printing speed is obtained based on the second reference unit and the second calibration unit.

2. The method for obtaining the print start position offset value according to claim 1, characterized in that, The scale of the first preset scale map is in pixels. The scale number is marked above or below the first preset scale map, wherein the 0 scale line is located in the middle of the first preset scale map.

3. The method for obtaining the printing start position offset value according to claim 2, characterized in that, The first preset graphic is any one of a triangle, rhombus, or star; the first preset graphic is located directly below the 0 mark of the first preset scale diagram.

4. The method for obtaining the print start position offset value according to claim 3, characterized in that, A line segment perpendicular to the printing direction is set above the center of the first preset graphic.

5. The method for obtaining the printing start position offset value according to claim 3, characterized in that, The step of obtaining the second printing start position offset value corresponding to the second printing speed based on the second reference unit and the second calibration unit includes: Obtain the second preset scale diagram of the second reference section; Obtain the second preset pattern from the second calibration unit; Obtain the scale value of the second preset graphic located below the second preset scale map; The second printing start position offset value is obtained based on the scale value.

6. The method for obtaining the printing start position offset value according to claim 3, characterized in that, The step of obtaining the second printing start position offset value corresponding to the second printing speed based on the second reference unit and the second calibration unit includes: The control image acquisition device acquires the second printing start position calibration map to obtain a third printing start position calibration map, the third printing start position calibration map including a third reference part and a third calibration part; Identify the third preset scale diagram of the third reference section and the third preset pattern of the third calibration section; Obtain the scale value of the third preset graphic located below the third preset scale diagram; The second printing start position offset value is obtained based on the scale value.

7. A method for calibrating the starting position of a print, characterized in that, The method includes: Obtain the second print start position offset value as described in any one of claims 1-6; Obtain the baseline printing start position corresponding to the first printing speed; The second printing start position corresponding to the second printing speed is obtained based on the reference printing start position and the offset value of the second printing start position; When the inkjet carriage prints along the printing direction at the second printing speed, the inkjet carriage is controlled to start ink ejection and printing at the second printing start position.

8. A device for obtaining a printing start position offset value, characterized in that, The device includes: The first print start position calibration map acquisition module is used to acquire a first print start position calibration map, wherein the first print start position calibration map includes at least a first reference part and a first calibration part; the first reference part includes a first preset scale map; the first calibration part includes a first preset graphic. The first printing module is used to control the inkjet carriage to print the first reference part in the first printing start position calibration diagram from the reference printing start position along the printing direction at the first printing speed, so as to obtain the second reference part in the second printing start position calibration diagram. The second printing module is used to control the inkjet carriage to print the first calibration part in the first printing start position calibration diagram from the reference printing start position along the printing direction at a second printing speed, so as to obtain the second calibration part in the second printing start position calibration diagram. The first offset value acquisition module is used to acquire the second printing start position offset value corresponding to the second printing speed based on the second reference part and the second calibration part.

9. A printing start position calibration device, characterized in that, The device includes: The second offset value acquisition module is used to acquire the second printing start position offset value as described in any one of claims 1-6; The reference printing start position acquisition module is used to acquire the reference printing start position corresponding to the first printing speed; The second printing start position acquisition module is used to acquire the second printing start position corresponding to the second printing speed based on the reference printing start position and the second printing start position offset value; The third printing module is used to control the inkjet carriage to start printing at the second printing start position when the inkjet carriage is printing along the printing direction at the second printing speed.

10. A 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 1-7.

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