Laser imaging scanning compensation method and system and related equipment

Abstract

The embodiment of the invention provides a laser imaging scanning compensation method and system and related equipment, which are used for realizing compensation of steering fluctuation errors in a laser imaging process and improving the consistency of pixel line spacing and imaging precision of laser imaging. The method provided by the embodiment of the invention comprises the following steps: acquiring corresponding error correction values when the laser array respectively turns around at different pixel row mapping positions, and establishing a first mapping relationship between each pixel row mapping position and the error correction value; in the lead screw transmission process, whether the current pixel line mapping position is located at the turning position or not is judged; if the laser array is located at the U-turn position, a target error correction value corresponding to the mapping position of the current pixel row is inquired according to the first mapping relation, compensated position data is determined according to the target error correction value, and a motor is controlled to reversely drive the laser array to move to the compensated position in a U-turn mode so as to scan a new pixel row.

Description

Technical Field

[0001] The present invention relates to the technical field of data processing, and in particular, to a laser imaging scanning compensation method, system and related devices. Background Art

[0002] In a laser direct writing imaging device (for example, the laser direct platemaking device for a planar screen printing stencil in the patent application No. 201310084860.3), it is necessary to drive a laser to reciprocate in the vertical direction of a pixel row by means of a lead screw drive. The applicant found that due to the clearance fit of the rolling screw itself and the elastic deformation caused by a certain load during operation, an axial transmission clearance is generated, which further forms a fluctuation error, thereby affecting the accuracy of laser imaging.

[0003] The existing error compensation method is to decompose the accumulated error in each step motion to achieve overall uniform compensation. However, the applicant found that during the vertical reciprocating scanning of laser imaging, the pixel row position error fluctuation is the largest at the turning position, and the overall uniform compensation cannot reduce the local image error at the turning position. Therefore, a new error compensation method is needed. Summary of the Invention

[0004] Embodiments of the present invention provide a laser imaging scanning compensation method, system and related devices, which are used to compensate for the turning fluctuation error during the laser imaging process and improve the consistency of the pixel row spacing and the imaging accuracy of laser imaging.

[0005] In a first aspect of the embodiments of the present invention, a laser imaging scanning compensation method is provided, which may include:

[0006] Obtain the error correction values corresponding to the laser array when turning around at different pixel row mapping positions, and establish a first mapping relationship between each pixel row mapping position and the error correction value;

[0007] During the lead screw drive process, determine whether the current pixel row mapping position is at the turning position; if it is at the turning position, query the target error correction value corresponding to the current pixel row mapping position according to the first mapping relationship, and determine the compensated position data according to the target error correction value, and control the motor to drive the laser array to turn around and move to the compensated position to scan a new pixel row.

[0008] Optionally, as a possible implementation manner, in the embodiments of the present invention, obtaining the error correction values corresponding to the laser array when turning around at different pixel row mapping positions may include:

[0009] Obtain the pixel row mapping positions turning around from the first direction, and respectively detect the error correction values corresponding to the pixel row mapping positions turning around from the first direction;

[0010] Obtain the pixel row mapping positions for turning around in the second direction opposite to the first direction, and respectively detect the error correction values corresponding to the pixel row mapping positions for turning around in the second direction.

[0011] Optionally, as a possible implementation manner, in the embodiments of the present invention, detecting the error correction value corresponding to the pixel row mapping position for turning around in the first direction may include:

[0012] Drive the laser array to move a first theoretical distance from the current pixel row mapping position in the second direction, and measure the difference D1 between the actually moved first actual distance and the first theoretical distance;

[0013] Drive the laser array to turn around from the first direction to the second direction at the current pixel row mapping position and move a second theoretical distance, and measure the difference D2 between the actually moved second actual distance and the second theoretical distance;

[0014] Calculate the difference between D1 and D2 as the error correction value corresponding to the current pixel row mapping position.

[0015] Optionally, as a possible implementation manner, in the embodiments of the present invention, detecting the error correction value corresponding to the pixel row mapping position for turning around in the second direction may include:

[0016] Drive the laser array to move a third theoretical distance from the current pixel row mapping position in the first direction, and measure the difference D3 between the actually moved third actual distance and the third theoretical distance;

[0017] Drive the laser array to turn around from the second direction to the first direction at the current pixel row mapping position and move a fourth theoretical distance, and measure the difference D4 between the actually moved fourth actual distance and the fourth theoretical distance;

[0018] Calculate the difference between D3 and D4 as the error correction value corresponding to the current pixel row mapping position.

[0019] Optionally, as a possible implementation manner, in the embodiments of the present invention, determining whether the current position of a calibration point fixed relative to the laser array is at a turning position may include:

[0020] Judge whether the advancing direction from the current position of the calibration point to the next target position is consistent with the current driving direction. If not, the current position of the calibration point is at the turning position.

[0021] A second aspect of the embodiments of the present invention provides a laser imaging scanning compensation system, which may include:

[0022] The data acquisition module obtains the error correction values corresponding to the turning around of the laser array at multiple different pixel row mapping positions, and establishes a first mapping relationship between each pixel row mapping position and the error correction value;

[0023] The processing module determines whether the current pixel row mapping position is at the turning around position during the lead screw drive; if it is at the turning around position, it queries the target error correction value corresponding to the current pixel row mapping position according to the first mapping relationship, determines the compensated position data according to the target error correction value, and controls the motor to reversely drive the laser array to turn around and move to the compensated position to scan a new pixel row.

[0024] Optionally, as a possible implementation manner, the data acquisition module in the embodiment of the present application may include:

[0025] The first acquisition unit obtains the pixel row mapping positions turning around from the first direction, and respectively detects the error correction values corresponding to the pixel row mapping positions turning around from the first direction;

[0026] The second acquisition unit obtains the pixel row mapping positions turning around in the second direction opposite to the first direction, and respectively detects the error correction values corresponding to the pixel row mapping positions turning around from the second direction.

[0027] Optionally, as a possible implementation manner, the first acquisition unit in the embodiment of the present application may include:

[0028] The first driving subunit drives the laser array to move a first theoretical distance from the current pixel row mapping position to the second direction, and measures the difference D1 between the actually moved first actual distance and the first theoretical distance;

[0029] The second driving subunit drives the laser array to turn around from the first direction to the second direction and move a second theoretical distance at the current pixel row mapping position, and measures the difference D2 between the actually moved second actual distance and the second theoretical distance;

[0030] The first calculation subunit calculates the difference between the D1 and the D2 as the error correction value corresponding to the current pixel row mapping position.

[0031] Optionally, as a possible implementation manner, the second acquisition unit in the embodiment of the present application may include:

[0032] The third driving subunit drives the laser array to move a third theoretical distance from the current pixel row mapping position to the first direction, and measures the difference D3 between the actually moved third actual distance and the third theoretical distance;

[0033] The fourth driving subunit drives the laser array to turn around from the second direction to the first direction at the mapped position of the current pixel row and move a fourth theoretical distance, and measures the difference D4 between the actually moved fourth actual distance and the fourth theoretical distance;

[0034] The second calculation unit calculates the difference between the D3 and the D4 as the error correction value corresponding to the mapped position of the current pixel row.

[0035] In a third aspect of the embodiments of the present invention, a laser imaging control device is provided. The laser imaging control device includes a processor, and the processor is configured to implement the steps in the first aspect and any possible implementation manner in the first aspect when executing a computer program stored in a memory.

[0036] In a fourth aspect of the embodiments of the present invention, a computer-readable storage medium is provided, on which a computer program is stored. When the computer program is executed by a processor, the steps in the first aspect and any possible implementation manner in the first aspect are implemented.

[0037] As can be seen from the above technical solutions, the embodiments of the present invention have the following advantages:

[0038] In the embodiments of the present invention, a first mapping relationship between the mapped position of each pixel row and the error correction value can be established. When it is recognized that the laser array is at the turning position, the target error correction value corresponding to the mapped position of the current pixel row is queried according to the first mapping relationship, and the compensated position data is determined according to the target error correction value, and the motor is controlled to reversely drive the laser array to turn around and move to the compensated position to scan a new pixel row. Compared with the prior art, the maximum fluctuation error of the pixel row position can be compensated at the turning position, the pitch difference of the pixel rows at the turning position is reduced, and the consistency of the pixel row pitch of the laser imaging is improved. In addition, during the measurement of the turning fluctuation error, the accumulated error of the same-direction movement is eliminated, the accuracy of the turning fluctuation error measurement is improved, and the accuracy of the laser imaging is improved. Description of the Drawings

[0039] Figure 1 It is a schematic diagram of an embodiment of a laser imaging scanning compensation method in the embodiments of the present invention;

[0040] Figure 2 It is a schematic diagram of an embodiment of a laser imaging control device in the embodiments of the present invention. Detailed Embodiments

[0041] To enable those skilled in the art to better understand the solution of the present invention, the technical solutions in the embodiments of the present invention will be clearly and completely described below with reference to the accompanying drawings in the embodiments of the present invention. Obviously, the described embodiments are only a part of the embodiments of the present invention, rather than all of the embodiments. Based on the embodiments of the present invention, all other embodiments obtained by those of ordinary skill in the art without creative efforts shall fall within the protection scope of the present invention.

[0042] The terms "first", "second", "third", "fourth", etc. in the specification and claims of the present invention and the above-mentioned drawings are used to distinguish similar objects, and are not necessarily used to describe a specific order or sequence. It should be understood that such data can be interchanged under appropriate circumstances so that the embodiments described herein can be implemented in an order other than that shown or described herein. In addition, the terms "comprising" and "having" and any variations thereof are intended to cover non-exclusive inclusion. For example, a process, method, system, product or device comprising a series of steps or units is not necessarily limited to those steps or units clearly listed, but may include other steps or units not clearly listed or inherent to these processes, methods, products or devices.

[0043] In the description of the present application, unless otherwise specified, the meaning of "a plurality" is two or more. Unless otherwise clearly defined and limited, the terms "installed", "connected", and "connected" should be understood in a broad sense. For example, it can be a fixed connection, a detachable connection, or an integral connection; it can be a mechanical connection or an electrical connection; it can be directly connected, or indirectly connected through an intermediate medium, and it can be the communication inside two components.

[0044] For the convenience of understanding, the specific process in the embodiments of the present invention will be described below. Please refer to Figure 1 , an embodiment of a laser imaging scanning compensation method in the embodiments of the present invention may include:

[0045] S101: Obtain the error correction values corresponding to the turning around of the laser array at multiple different pixel row mapping positions, and establish a first mapping relationship between each pixel row mapping position and the error correction value.

[0046] Before the laser imaging device performs pixel row scanning, it is necessary to determine the turning positions required for scanning the entire frame according to the adopted scanning strategy (skipping two rows, skipping multiple rows, etc.). In different scanning strategies, different turning positions correspond to each scanning process. In the embodiments of the present application, the laser imaging scanning compensation system can obtain in advance at which pixel row mapping positions the laser array turns around according to the scanning strategy, and obtain in advance the error correction values corresponding to different turning positions at different pixel row mapping positions, and establish a first mapping relationship between each pixel row mapping position and the error correction value. It can be understood that the error correction values corresponding to turning around at different positions in the same direction may be different.

[0047] Specifically, the directions of the linear motion of the laser array are the first direction and the second direction that are opposite to each other, and it can turn around from the first direction and from the second direction. As a possible implementation manner, the laser imaging scanning compensation can respectively obtain the pixel row mapping positions where it turns around from the first direction and the pixel row mapping positions where it turns around from the second direction, and respectively detect the error correction values corresponding to the pixel row mapping positions where it turns around from the first direction and the error correction values corresponding to the pixel row mapping positions where it turns around from the second direction.

[0048] Exemplarily, detecting the error correction value corresponding to the pixel row mapping position where it turns around from the first direction may include: driving the laser array to move a first theoretical distance after turning around from the first direction at the current pixel row mapping position, and measuring the difference D1 between the actually moved first actual distance and the first theoretical distance when driving the laser array to move the first theoretical distance from the current pixel row mapping position in the second direction (i.e., measuring the accumulated error); driving the laser array to turn around from the first direction to the second direction at the current pixel row mapping position and move a second theoretical distance, and measuring the difference D2 between the actually moved second actual distance and the second theoretical distance (i.e., the comprehensive difference of the accumulated error and the turning fluctuation error); calculating the difference between D1 and D2 (this difference is the turning fluctuation error value) as the error correction value corresponding to the current pixel row mapping position.

[0049] Exemplarily, detecting the error correction value corresponding to the pixel row mapping position where it turns around from the second direction may include: driving the laser array to move a third theoretical distance in the first direction from the current pixel row mapping position, and measuring the difference D3 between the actually moved third actual distance and the third theoretical distance; driving the laser array to turn around from the second direction to the first direction at the current pixel row mapping position and move a fourth theoretical distance (continuous movement), and measuring the difference D4 between the actually moved fourth actual distance and the fourth theoretical distance; calculating the difference between D3 and D4 as the error correction value corresponding to the current pixel row mapping position.

[0050] S102: During the screw drive process, determine whether the current pixel row mapping position is at the turning position.

[0051] During the process of driving the laser array to move in a straight line direction (such as a horizontal straight line or a vertical straight line) by a lead screw drive, in order to eliminate the pixel row position error fluctuation at the turning position, it is necessary to determine whether the current pixel row mapping position is at the turning position. If it is not at the turning position, no error compensation is performed.

[0052] Specifically, the laser imaging scanning compensation system can determine whether the forward direction from the current position of the calibration point to the next target position is consistent with the current driving direction. If not, the current position of the calibration point is at the turning position.

[0053] S103: Query the target error correction value corresponding to the current pixel row mapping position according to the first mapping relationship, and determine the compensated position data according to the target error correction value.

[0054] If it is at the turning position, query the target error correction value corresponding to the current pixel row mapping position according to the first mapping relationship, determine the compensated position data according to the target error correction value, and control the motor to drive the laser array to turn around and move to the compensated position to scan the new pixel row.

[0055] It can be understood that the direction of error correction can be determined according to the moving direction. Exemplarily, when running upward and turning downward in the vertical direction, the target error correction value can reduce the theoretical moving distance, and when running downward and turning upward, the target error correction value can increase the theoretical moving distance to overcome the turning fluctuation error.

[0056] From the above disclosed content, in the embodiment of the present application, a first mapping relationship corresponding to each pixel row mapping position and the error correction value can be established. When it is recognized that the laser array is at the turning position, query the target error correction value corresponding to the current pixel row mapping position according to the first mapping relationship, determine the compensated position data according to the target error correction value, and control the motor to drive the laser array to turn around and move to the compensated position to scan the new pixel row. Compared with the prior art, the maximum fluctuation error of the pixel row position can be compensated at the turning position, the pitch difference of the pixel rows at the turning position is reduced, and the consistency of the pixel row pitch of the laser imaging is improved. In addition, during the measurement of the turning fluctuation error, the cumulative error of the same-direction movement is eliminated, the measurement accuracy of the turning fluctuation error is improved, and it is beneficial to improve the accuracy of the laser imaging.

[0057] The embodiment of the present application also provides a laser imaging scanning compensation system, which may include:

[0058] A data acquisition module, which obtains the error correction values corresponding to the laser array when turning around at different pixel row mapping positions, and establishes a first mapping relationship between each pixel row mapping position and the error correction value;

[0059] A processing module, during the lead screw drive process, determines whether the current pixel row mapping position is at the turning position; if it is at the turning position, queries the target error correction value corresponding to the current pixel row mapping position according to the first mapping relationship, determines the compensated position data according to the target error correction value, and controls the motor to reverse-drive the laser array to turn around and move to the compensated position to scan the new pixel row.

[0060] Optionally, as a possible implementation manner, the data acquisition module in the embodiment of the present application may include:

[0061] A first acquisition unit, which obtains the pixel row mapping positions turning around from the first direction, and respectively detects the error correction values corresponding to the pixel row mapping positions turning around from the first direction;

[0062] A second acquisition unit, which obtains the pixel row mapping positions turning around in the second direction opposite to the first direction, and respectively detects the error correction values corresponding to the pixel row mapping positions turning around from the second direction.

[0063] Optionally, as a possible implementation manner, the first acquisition unit in the embodiment of the present application may include:

[0064] A first driving subunit, which drives the laser array to move a first theoretical distance from the current pixel row mapping position to the second direction, and measures the difference D1 between the actually moved first actual distance and the first theoretical distance;

[0065] A second driving subunit, which drives the laser array to turn around from the first direction to the second direction at the current pixel row mapping position and move a second theoretical distance, and measures the difference D2 between the actually moved second actual distance and the second theoretical distance;

[0066] A first calculation subunit, which calculates the difference between D1 and D2 as the error correction value corresponding to the current pixel row mapping position.

[0067] Optionally, as a possible implementation manner, the second acquisition unit in the embodiment of the present application may include:

[0068] A third driving subunit, which drives the laser array to move a third theoretical distance from the current pixel row mapping position to the first direction, and measures the difference D3 between the actually moved third actual distance and the third theoretical distance;

[0069] The fourth driving subunit drives the laser array to turn around from the second direction to the first direction at the current pixel row mapping position and move a fourth theoretical distance, and measures the difference D4 between the actually moved fourth actual distance and the fourth theoretical distance;

[0070] The second calculation unit calculates the difference between D3 and D4 as the error correction value corresponding to the current pixel row mapping position.

[0071] Those skilled in the art can clearly understand that for the convenience and simplicity of description, the specific working processes of the above-described systems, devices, and units can refer to the corresponding processes in the foregoing method embodiments and will not be elaborated herein.

[0072] The laser imaging scanning compensation system in the embodiments of the present invention has been described above from the perspective of modular functional entities. Please refer to Figure 2 , and the laser imaging control device in the embodiments of the present invention will be described below from the perspective of hardware processing:

[0073] The laser imaging control device 1 may include a memory 11, a processor 12, and an input / output bus 13. When the processor 12 executes a computer program, it implements the steps in the method embodiments shown above Figure 1 , such as Figure 1 the steps 101 to 103 shown. Alternatively, when the processor executes a computer program, it implements the functions of each module or unit in the foregoing device embodiments.

[0074] Among them, the memory 11 includes at least one type of readable storage medium. The readable storage medium includes flash memory, hard disk, multimedia card, card-type memory (such as SD or DX memory, etc.), magnetic memory, magnetic disk, optical disk, etc. The memory 11 may be an internal storage unit of the laser imaging control device 1 in some embodiments, such as the hard disk of the laser imaging control device 1. The memory 11 may also be an external storage device of the laser imaging control device 1 in other embodiments, such as a plug-in hard disk, a Smart Media Card (SMC), a Secure Digital (SD) card, a Flash Card, etc. equipped on the laser imaging control device 1. Further, the memory 11 may also include both the internal storage unit and the external storage device of the laser imaging control device 1. The memory 11 can be used not only to store application software installed in the laser imaging control device 1 and various types of data, such as the code of a computer program, but also to temporarily store data that has been output or will be output.

[0075] In some embodiments, the processor 12 may be a central processing unit (CPU), a controller, a microcontroller, a microprocessor, or other data processing chips, which is used to run the program code stored in the memory 11 or process data, such as executing a computer program and the like.

[0076] The input / output bus 13 may be a peripheral component interconnect (PCI) bus, an extended industry standard architecture (EISA) bus, or the like. The bus may be divided into an address bus, a data bus, a control bus, and the like.

[0077] Furthermore, the laser imaging control device may further include a wired or wireless network interface 14. The network interface 14 may optionally include a wired interface and / or a wireless interface (such as a WI-FI interface, a Bluetooth interface, etc.), which is generally used to establish a communication connection between the laser imaging control device 1 and other electronic devices.

[0078] Optionally, the laser imaging control device 1 may further include a user interface. The user interface may include a display, an input unit such as a keyboard. Optionally, the user interface may further include a standard wired interface and a wireless interface. Optionally, in some embodiments, the display may be an LED display, a liquid crystal display, a touch liquid crystal display, and an OLED (Organic Light-Emitting Diode) toucher, etc. Among them, the display may also be appropriately referred to as a display screen or a display unit, which is used to display the information processed in the laser imaging control device 1 and to display a visual user interface.

[0079] Figure 2 Only the laser imaging control device 1 having components 11-14 and a computer program is shown. Those skilled in the art can understand that Figure 2 the shown structure does not constitute a limitation on the laser imaging control device 1, and it may include fewer or more components than shown, or combine some components, or have different component arrangements.

[0080] The present invention also provides a computer-readable storage medium, on which a computer program is stored. When the computer program is executed by a processor, the steps in the method embodiments as described above can be implemented, such as Figure 1 the steps shown. Or, when the processor executes the computer program, the functions of each module or unit in the above device embodiments are implemented. Figure 1 the steps 101 to 103 shown.

[0081] In several embodiments provided by the present application, it should be understood that the disclosed systems, devices and methods can be implemented in other ways. For example, the device embodiments described above are merely illustrative. For example, the division of the units is only a logical function division. In actual implementation, there may be other division methods. For example, multiple units or components can be combined or integrated into another system, or some features can be ignored or not executed. Another point is that the displayed or discussed couplings or direct couplings or communication connections to each other can be through some interfaces, and the indirect couplings or communication connections of devices or units can be in electrical, mechanical or other forms.

[0082] The units described as separate components may or may not be physically separated. The components displayed as units may or may not be physical units, that is, they can be located in one place or distributed to multiple network units. Some or all of the units can be selected according to actual needs to achieve the purpose of the solution of this embodiment.

[0083] In addition, in each embodiment of the present invention, the functional units can be integrated in a processing unit, or each unit can exist physically alone, or two or more units can be integrated in one unit. The above-mentioned integrated units can be implemented in the form of hardware or in the form of software functional units.

[0084] If the above-mentioned integrated unit is implemented in the form of a software functional unit and sold or used as an independent product, it can be stored in a computer-readable storage medium. Based on this understanding, the technical solution of the present invention, in essence, or the part that contributes to the prior art, or all or part of this technical solution, can be embodied in the form of a software product. This computer software product is stored in a storage medium and includes several instructions for causing a computer device (which can be a personal computer, a server, or a network device, etc.) to execute all or part of the steps of the methods described in each embodiment of the present invention. And the aforementioned storage medium includes: various media such as USB flash drives, mobile hard disks, read-only memories (ROM, Read-Only Memory), random access memories (RAM, Random Access Memory), magnetic disks or optical discs that can store program codes.

[0085] As described above, the above embodiments are only used to illustrate the technical solutions of the present invention, rather than limiting it; although the present invention has been described in detail with reference to the foregoing embodiments, those of ordinary skill in the art should understand that: they can still modify the technical solutions recorded in the foregoing embodiments, or perform equivalent replacements on some of the technical features; and these modifications or replacements do not cause the essence of the corresponding technical solutions to deviate from the spirit and scope of the technical solutions of the embodiments of the present invention.

Claims

1. A laser imaging scanning compensation method, characterized in that A laser array applied to reciprocate in a straight line direction based on a lead screw drive structure, comprising: Obtain the error correction values corresponding to the laser array when turning around at multiple different pixel row mapping positions, and establish a first mapping relationship between each pixel row mapping position and the error correction value; During the lead screw drive process, determine whether the current pixel row mapping position is at the turning position; if it is at the turning position, query the target error correction value corresponding to the current pixel row mapping position according to the first mapping relationship, and determine the compensated position data according to the target error correction value, and control the motor to reversely drive the laser array to turn around and move to the compensated position to scan a new pixel row.

2. The method according to claim 1, characterized in that, Obtaining the error correction values corresponding to the laser array when turning around at multiple different pixel row mapping positions, including: Obtain the pixel row mapping positions turning around from the first direction, and respectively detect the error correction values corresponding to the pixel row mapping positions turning around from the first direction; Obtain the pixel row mapping positions turning around in the second direction opposite to the first direction, and respectively detect the error correction values corresponding to the pixel row mapping positions turning around from the second direction.

3. The method according to claim 2, characterized in that Detecting the error correction value corresponding to the pixel row mapping position turning around from the first direction, including: Drive the laser array to move a first theoretical distance from the current pixel row mapping position to the second direction, and measure the difference D1 between the actually moved first actual distance and the first theoretical distance; Drive the laser array to turn around from the first direction to the second direction at the current pixel row mapping position and move a second theoretical distance, and measure the difference D2 between the actually moved second actual distance and the second theoretical distance; Calculate the difference between the D1 and the D2 as the error correction value corresponding to the current pixel row mapping position.

4. The method according to claim 2, characterized in that Detecting the error correction value corresponding to the pixel row mapping position turning around from the second direction, including: Drive the laser array to move a third theoretical distance from the current pixel row mapping position to the first direction, and measure the difference D3 between the actually moved third actual distance and the third theoretical distance; Drive the laser array to turn around from the second direction to the first direction at the current pixel row mapping position and move a fourth theoretical distance, and measure the difference D4 between the actually moved fourth actual distance and the fourth theoretical distance; Calculate the difference between the D3 and the D4 as the error correction value corresponding to the current pixel row mapping position.

5. The method according to any one of claims 1 to 4, characterized in that, Determine whether the current position of the calibration point with a fixed relative position to the laser array is at the turning position, including: Judge whether the forward direction from the current position of the calibration point to the next target position is consistent with the current driving direction. If not, the current position of the calibration point is at the turning position.

6. A laser imaging scanning compensation system, characterized in that, Including: A data acquisition module, which obtains the error correction values corresponding to the laser array when turning around at different pixel row mapping positions, and establishes a first mapping relationship between each pixel row mapping position and the error correction value; The processing module determines whether the current pixel row mapping position is at the turning position during the lead screw drive; if it is at the turning position, it queries the target error correction value corresponding to the current pixel row mapping position according to the first mapping relationship, determines the compensated position data according to the target error correction value, and controls the motor to drive the laser array to turn around and move to the compensated position in the reverse direction to scan a new pixel row.

7. The system according to claim 6, characterized in that, The data acquisition module includes: The first acquisition unit acquires the pixel row mapping positions turning around from the first direction and respectively detects the error correction values corresponding to the pixel row mapping positions turning around from the first direction; The second acquisition unit acquires the pixel row mapping positions turning around from the second direction opposite to the first direction and respectively detects the error correction values corresponding to the pixel row mapping positions turning around from the second direction.

8. The system according to claim 7, wherein The first acquisition unit includes: The first driving sub-unit drives the laser array to move a first theoretical distance from the current pixel row mapping position to the second direction and measures the difference D1 between the actually moved first actual distance and the first theoretical distance; The second driving sub-unit drives the laser array to turn around from the first direction to the second direction at the current pixel row mapping position and move a second theoretical distance, and measures the difference D2 between the actually moved second actual distance and the second theoretical distance; The first calculation sub-unit calculates the difference between D1 and D2 as the error correction value corresponding to the current pixel row mapping position.

9. A laser imaging control device, characterized in that, The laser imaging control device includes a processor, and the processor is used to implement the method according to any one of claims 1 to 5 when executing the computer program stored in the memory.

10. A computer-readable storage medium having a computer program stored thereon, characterized in that: The computer program, when executed by the processor, implements the method according to any one of claims 1 to 5.

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