A scanning control method and system of a laser direct writing device and related device

Abstract

Embodiments of the present application provide a scanning control method, a control system and related equipment of a laser direct writing device, which are used to improve the precision, efficiency and compatibility of the control program of laser imaging. The method of the embodiments of the present application comprises: acquiring image data of an original grid image, wherein the image data at least comprises position parameters of pixel exposure points in each pixel row; acquiring a scanning strategy selection instruction, wherein the scanning strategy selection instruction indicates a target scanning strategy selected from a plurality of scanning strategies, and each scanning strategy indicates a scanning order of each pixel row; reading the position parameters of the pixel exposure points in each pixel row according to the scanning order in the target scanning strategy, and controlling a laser array to scan a mapping area of each pixel row on a photosensitive coating according to the scanning order in the target scanning strategy, and exposing the positions of the pixel exposure points of each pixel row in the scanning process.

Description

Technical Field

[0001] This application relates to the field of laser direct writing imaging technology, and in particular to a scanning control method, control system and related equipment for a laser direct writing device. Background Technology

[0002] Laser direct imaging devices in related technologies (such as the laser direct plate-making device for flat screen printing plates disclosed in application number: 201310084860.3) control a laser array to scan the photosensitive coating on the exposure surface back and forth in a preset horizontal direction. After each laser in the laser array is assigned an exposure area, it scans the pixel rows in the exposure area line by line in positional order.

[0003] The applicant found that if the exposure interval is too long, the exposure effect of the image in the later exposed area will be worse than that in the first exposed area due to light pollution. If the image is scanned line by line in order from near to far, when the exposure area is too large and the interval between the first and last pixel lines scanned by a single laser exceeds a certain threshold, the image consistency of the areas where the first and last pixel lines are located is poor.

[0004] To address this, the applicant proposed an interval-skipping exposure scanning strategy, which is a strategy that does not strictly follow the positional order of line scanning. The specific exposure scanning strategy can be selected according to the specific use case. How to select the exposure scanning strategy and / or ensure the compatibility and switchability of the implementation programs for multiple strategies has become an urgent problem to be solved. Summary of the Invention

[0005] This application provides a scanning control method, control system, and related equipment for a laser direct writing device, which improves the accuracy, efficiency, and compatibility of the control program in laser imaging.

[0006] The first aspect of this application provides a scanning control method for a laser direct writing device, which may include:

[0007] Acquire image data of the original raster image, wherein the image data includes at least the position parameters of the pixel exposure points in each pixel row;

[0008] Obtain a scanning strategy selection instruction, which indicates the target scanning strategy selected from multiple scanning strategies, each scanning strategy indicating the scanning order of each pixel row;

[0009] The position parameters of the pixel exposure points in each pixel row are read according to the scanning order in the target scanning strategy, and the laser array is controlled to scan the mapping area of ​​each pixel row on the photosensitive coating according to the equally spaced skip scanning order in the target scanning strategy, and the position of the pixel exposure point of each pixel row is exposed during the scanning process.

[0010] Optionally, as a possible implementation, in this embodiment of the application, the instruction for obtaining the scanning strategy selection includes:

[0011] Determine the target range where the area size of the photosensitive coating is located, and use the scanning strategy associated with the target range as the target scanning strategy.

[0012] Optionally, as a possible implementation, the scanning control method of the laser direct writing device in this application embodiment may further include:

[0013] The resolution of the original raster image is obtained, and the mapping area of ​​each pixel row in the original raster image on the photosensitive coating is determined according to the spacing between adjacent rows of pixels.

[0014] Optionally, as a possible implementation, the scanning control method of the laser direct writing device in this application embodiment may further include: before controlling the laser array to scan the mapping area of ​​each pixel row on the photosensitive coating according to the scanning order in the target scanning strategy, obtaining the offset of each laser in the laser array relative to a preset reference point;

[0015] The pixel exposure points in the pixel rows that each laser needs to scan are shifted along the scanning direction, so that the shift amount is equal to the offset of each laser relative to the preset reference point.

[0016] A second aspect of this application provides a control system, which may include:

[0017] The first acquisition module is used to acquire image data of the original raster image, wherein the image data includes at least the position parameters of the pixel exposure points in each pixel row;

[0018] The second acquisition module is used to acquire a scanning strategy selection instruction, which indicates the target scanning strategy selected from multiple scanning strategies, and each scanning strategy indicates the equally spaced skip scanning order of each pixel row.

[0019] The control module is used to read the position parameters of the pixel exposure points in each pixel row according to the scanning order in the target scanning strategy, and control the laser array to scan the mapping area of ​​each pixel row on the photosensitive coating according to the scanning order in the target scanning strategy, and expose the position of the pixel exposure points in each pixel row during the scanning process.

[0020] Optionally, as one possible implementation, the control module may include:

[0021] The judgment unit determines the target interval in which the area size of the photosensitive coating is located, and uses the scanning strategy associated with the target interval as the target scanning strategy.

[0022] Optionally, as a possible implementation, the control system in this application embodiment may further include:

[0023] The mapping module is used to obtain the resolution of the original raster image and determine the mapping area of ​​each pixel row in the original raster image on the photosensitive coating according to the spacing between adjacent rows of pixels.

[0024] Optionally, as a possible implementation, the control system in the embodiments of this application may further include:

[0025] The third acquisition module is used to acquire the offset of each laser in the laser array relative to a preset reference point;

[0026] The adjustment module is used to adjust the pixel exposure points in the pixel row that each laser needs to scan along the scanning direction, so that the displacement is equal to the offset of each laser relative to the preset reference point.

[0027] A third aspect of this application provides a computer device including a processor, which executes a computer program stored in a memory to implement the steps of the first aspect and any possible implementation thereof.

[0028] A fourth aspect of this application provides a computer-readable storage medium having a computer program stored thereon, which, when executed by a processor, implements the steps of the first aspect and any possible implementation thereof.

[0029] As can be seen from the above technical solutions, the embodiments of this application have the following advantages:

[0030] In this embodiment, the control system can read the position parameters of the pixel exposure points in each pixel row according to the scanning sequence indicated by the scanning strategy determined by the scanning command. This eliminates the need to develop multiple separate scanning control programs and enables rapid switching between multiple scanning strategies, improving the compatibility of the control program. Furthermore, the control system can dynamically and automatically adjust the scanning strategy based on parameters such as the area size of the photosensitive coating, avoiding mismatches between the scanning strategy and the applicable scenario, thus improving the accuracy and efficiency of laser direct-write imaging. Attached Figure Description

[0031] Figure 1This is a schematic diagram of an embodiment of a scanning control method for a laser direct writing device according to the present application.

[0032] Figure 2 This is a schematic diagram of another embodiment of a scanning control method for a laser direct writing device according to the present application.

[0033] Figure 3 This is a schematic diagram of one embodiment of a computer device according to the present application. Detailed Implementation

[0034] To enable those skilled in the art to better understand the present application, the technical solutions in the embodiments of the present application will be clearly and completely described below with reference to the accompanying drawings. Obviously, the described embodiments are only some embodiments of the present application, and not all embodiments. Based on the embodiments in the present application, all other embodiments obtained by those of ordinary skill in the art without creative effort should fall within the scope of protection of the present application.

[0035] In the specification, claims, and accompanying drawings of this application, the terms "upper," "lower," "left," "right," "vertical," "horizontal," "top," "bottom," "inner," and "outer," etc., indicate the orientation or positional relationship based on the orientation or positional relationship shown in the drawings. They are used only for the convenience of describing this application and simplifying the description, and do not indicate or imply that the device or element referred to must have a specific orientation, or be constructed and operated in a specific orientation. Therefore, they should not be construed as limitations on this application.

[0036] Furthermore, the terms "first" and "second" are used for descriptive purposes only and should not be construed as indicating or implying relative importance or implicitly specifying the number of technical features indicated. Thus, a feature defined as "first" or "second" may explicitly or implicitly include one or more of that feature. In the description of this application, unless otherwise stated, "a plurality of" means two or more. Unless otherwise expressly specified and limited, the terms "installed," "connected," and "joined" should be interpreted broadly, for example, as a fixed connection, a detachable connection, or an integral connection; a mechanical connection or an electrical connection; a direct connection or an indirect connection through an intermediate medium; or a connection within two elements. The term "comprising" and any variations thereof are intended to cover non-exclusive inclusion. Those skilled in the art can understand the specific meaning of the above terms in this application according to the specific circumstances.

[0037] For ease of understanding, the laser direct imaging device to which the scanning control method of the laser direct writing device in the embodiments of this application can be applied will be described below. The laser direct imaging device includes at least a laser array that can move in both horizontal and vertical directions. For example, as one possible implementation, the laser array may contain multiple lasers arranged vertically, and the vertical projection points (i.e., the projection points of the laser spots in the vertical direction, ensuring that the laser spots do not overlap in the vertical direction) of the lasers constituting the laser array are not overlapping. In practical applications, the laser array repeatedly scans the exposure surface in the horizontal direction. During one scan, multiple laser beams in the laser array scan multiple pixel rows on the exposure surface simultaneously at a fixed interval (this fixed interval is determined by the installation position) to selectively expose the pixels in each pixel row. After the previous scan is completed, the laser array moves the lasers in the vertical direction of the scanning direction with a fixed step size, and then scans in the opposite horizontal direction, so that the lasers can perform parallel scanning and exposure of the unscanned pixel rows in the scanning gaps between adjacent lasers on their respective exposure surfaces. In a single reciprocating scan, there are two horizontal scans: one from left to right and the other from right to left, each scanning different rows of pixels.

[0038] It should be noted that, in the embodiments of this application, the horizontal direction refers to the direction parallel to the pixel rows of the image to be formed on the exposure surface or a plane parallel to the exposure surface, and the vertical direction refers to the direction perpendicular to the selected horizontal direction on the exposure surface or a plane parallel to the exposure surface. Therefore, the horizontal and vertical directions in this application vary with the location of the exposure surface and the direction of the pixel rows of the image to be formed on the exposure surface, and the specific directions are not limited here.

[0039] The specific process described below in the embodiments of this application is as follows. Please refer to [link / reference]. Figure 1 One embodiment of the scanning control method for the laser direct writing device in this application may include:

[0040] S101: Obtain the image data of the original raster image. The image data shall include at least the position parameters of the pixel exposure points in each pixel row.

[0041] After acquiring the raw raster image to be imaged, the image data can be obtained by rasterizing the raster image. This image data includes at least the position parameters of the pixel exposure points in each pixel row, and other parameters such as image resolution and image size can also be obtained as needed, which are not limited here.

[0042] S102: Obtain the scan strategy selection instruction, which indicates the target scan strategy to be selected from multiple scan strategies, and each scan strategy indicates the equally spaced skip scan order of each pixel row.

[0043] Since scanning line by line from near to far in sequence can lead to significant differences in exposure in some areas, the applicant proposes a scanning strategy that does not follow the positional order to improve the overall consistency of laser imaging. For example, various scanning strategies can be used to perform interval exposure by setting the number of lines, such as single lines or double lines.

[0044] In practical applications, a suitable scanning strategy can be selected based on factors such as the size of the photosensitive coating area, the type of photosensitive emulsion, and the coating thickness. The control system can obtain scanning strategy selection instructions, which indicate the target scanning strategy selected from multiple scanning strategies. Each scanning strategy indicates the scanning order of each pixel row. It is important to note that the scanning strategy here refers to an equally spaced, skip-style exposure strategy that does not follow positional order. For example, the pixel rows within the exposure area are exposed at intervals of single rows, double rows, etc., from near to far. For example, Strategy 1: Pixel rows numbered 1 to 100 from near to far can be exposed at 1-row intervals, first the odd-numbered rows (1357…99) and then the even-numbered rows (2, 4, 6, 8…100); Strategy 2: Pixel rows numbered 1 to 100 from near to far can be exposed at 2-row intervals, first the first group (1, 4, 7…100), then the second group (2, 5, 8…98), and finally the third group (3, 6, 9…99). The equal-interval skip exposure strategy allows some areas in the farthest region (e.g., rows 90 to 100 pixels) to be scanned in advance, reducing the scanning time interval between the farthest and closest regions, decreasing the exposure difference between the two regions, and improving the overall consistency of the exposure area.

[0045] For example, when parameters such as the type and thickness of the photosensitive emulsion are fixed, as one possible implementation, the control system can determine the target range where the current area size of the photosensitive coating is located, and use the scanning strategy associated with the target range as the target scanning strategy. Specifically, the larger the area size, the larger the number of interval rows for interval exposure, and the mapping relationship between the target range and the scanning strategy can be determined in advance based on the results of a limited number of experiments.

[0046] When parameters such as the type and thickness of the photosensitive emulsion are not fixed, the control system can calculate the weighted value based on the current value of each parameter and the preset weight of each parameter in the actual application, and use the scanning strategy associated with the target interval where the weighted value is located as the target scanning strategy.

[0047] S103: Control the laser array to scan the mapping area of ​​each pixel row on the photosensitive coating according to the scanning order in the target scanning strategy, and expose the position of the pixel exposure point of each pixel row during the scanning process.

[0048] After determining the target scanning strategy, the control system can read the position parameters of the pixel exposure points in each pixel row according to the scanning order in the target scanning strategy, obtain the resolution of the original raster image, calculate the spacing between adjacent rows of pixels based on the resolution, and then determine the mapping area of ​​each pixel row in the original raster image on the photosensitive coating based on the spacing between adjacent rows of pixels. Finally, the control system moves the laser array to the corresponding mapping area, scans the mapping area of ​​each pixel row on the photosensitive coating according to the scanning order in the target scanning strategy, and exposes the position of the pixel exposure points of each pixel row during the scanning process.

[0049] As can be seen from the above disclosure, in the embodiments of this application, the control system can read the position parameters of the pixel exposure points in each pixel row according to the scanning sequence indicated by the scanning strategy determined by the scanning command. This eliminates the need to develop multiple separate scanning control programs, enabling rapid switching between multiple scanning strategies and improving the compatibility of the control program. Furthermore, the control system can dynamically and automatically adjust the scanning strategy based on parameters such as the area size of the photosensitive coating, avoiding mismatches between the scanning strategy and the applicable scenario, thus improving the accuracy and efficiency of laser direct-write imaging.

[0050] In the above Figure 1 Based on the illustrated embodiment, the offset of the lasers in the laser array in the scanning direction (parallel to the horizontal direction, which can be horizontal to the left or horizontal to the right) is often inconsistent (due to installation errors). The coordinate values ​​of the laser spot on the exposure surface in the X direction may be different. If the laser is controlled to expose according to the position of the laser exposure point on the acquired original dot matrix image, due to the deviation of the spot in the X direction, the developed image after development will have row pixel shift in the X direction, resulting in distortion of the developed image relative to the template image. To further improve the accuracy of laser imaging, it is necessary to adjust the pixel exposure points in the pixel row before laser scanning.

[0051] Alternatively, as one possible implementation, please refer to Figure 2 Another embodiment of the scanning control method for the laser direct writing device in this application may include:

[0052] S201: Obtain the image data of the original raster image, which includes at least the position parameters of the pixel exposure points in each pixel row.

[0053] S202: Obtain scan strategy selection instructions. The scan strategy selection instructions indicate the target scan strategy to be selected from multiple scan strategies. Each scan strategy indicates the equally spaced skip scan order of each pixel row.

[0054] S203: Obtain the offset of each laser in the laser array relative to a preset reference point.

[0055] To compensate for pixel offset caused by laser installation errors, it is necessary to measure the positional deviation between each laser.

[0056] Therefore, in this embodiment, a preset reference point can be set first, and the offset of each laser in the laser array relative to the preset reference point can be obtained. Preferably, the preset reference point is the laser with the largest offset along the scanning direction.

[0057] S204: Adjust the pixel exposure points in the pixel rows to be scanned by each laser along the scanning direction so that the displacement is equal to the offset of each laser relative to the preset reference point.

[0058] After determining the offset of each laser relative to the preset reference point, the scanning direction can be used as the correction direction. The pixel exposure points in the pixel row that each laser needs to scan are shifted along the scanning direction so that the shift is equal to the offset of each laser relative to the preset reference point.

[0059] S205: Control the laser array to scan the mapping area of ​​each pixel row on the photosensitive coating according to the scanning order in the target scanning strategy, and expose the position of the pixel exposure point of each pixel row during the scanning process.

[0060] It should be noted that the content described in steps S201, S202, and S205 above is the same as that described above. Figure 1 The steps S101 to S103 in the illustrated embodiment are similar and will not be repeated here.

[0061] It is understood that, in the various embodiments of this application, the sequence number of each step does not imply the order of execution. The execution order of each step should be determined by its function and internal logic, and should not constitute any limitation on the implementation process of the embodiments of this application. For example, steps S203 to S204 can be implemented before or after steps S201 and S202, and no specific limitation is made here.

[0062] This application embodiment also provides a control system, which may include:

[0063] The first acquisition module is used to acquire image data of the original raster image. The image data includes at least the position parameters of the pixel exposure points in each pixel row.

[0064] The second acquisition module is used to acquire scanning strategy selection instructions. The scanning strategy selection instructions indicate the target scanning strategy selected from multiple scanning strategies, and each scanning strategy indicates the scanning order of each pixel row.

[0065] The control module is used to read the position parameters of the pixel exposure points in each pixel row according to the scanning order in the target scanning strategy, and control the laser array to scan the mapping area of ​​each pixel row on the photosensitive coating according to the scanning order in the target scanning strategy, and expose the position of the pixel exposure points in each pixel row during the scanning process.

[0066] Optionally, as one possible implementation, the control module may include:

[0067] The judgment unit determines the target range where the area size of the photosensitive coating is located, and uses the scanning strategy associated with the target range as the target scanning strategy.

[0068] Optionally, as a possible implementation, the control system in the embodiments of this application may further include:

[0069] The mapping module is used to obtain the resolution of the original raster image and determine the mapping area of ​​each pixel row in the original raster image on the photosensitive coating based on the spacing between adjacent rows of pixels.

[0070] Optionally, as a possible implementation, the control system in the embodiments of this application may further include:

[0071] The third acquisition module is used to acquire the offset of each laser in the laser array relative to a preset reference point;

[0072] The adjustment module is used to adjust the pixel exposure points in the pixel row that each laser needs to scan along the scanning direction, so that the displacement is equal to the offset of each laser relative to the preset reference point.

[0073] Those skilled in the art will understand that, for the sake of convenience and brevity, the specific working processes of the systems and modules described above can be referred to the corresponding processes in the foregoing method embodiments, and will not be repeated here.

[0074] The control system in the embodiments of this application has been described above from the perspective of modular functional entities. Please refer to [link / reference]. Figure 3 The computer device in the embodiments of this application will now be described from the perspective of hardware processing:

[0075] The computer device 1 may include a memory 11, a processor 12, and an input / output bus 13. The processor 12 executes the computer program to implement the above-described... Figure 1 The steps in the method embodiments shown, for example Figure 1 Steps 101 to 103 are shown. Alternatively, the processor executes a computer program to implement the functions of each module or unit in the above-described device embodiments.

[0076] The memory 11 includes at least one type of readable storage medium, including flash memory, hard disk, multimedia card, card-type memory (e.g., SD or DX memory), magnetic memory, magnetic disk, optical disk, etc. In some embodiments, the memory 11 can be an internal storage unit of the computer device 1, such as the hard disk of the computer device 1. In other embodiments, the memory 11 can be an external storage device of the computer device 1, such as a plug-in hard disk, smart media card (SMC), secure digital (SD) card, flash card, etc., equipped on the computer device 1. Furthermore, the memory 11 can include both internal storage units and external storage devices of the computer device 1. The memory 11 can be used not only to store application software and various types of data installed on the computer device 1, such as computer program code, but also to temporarily store data that has been output or will be output.

[0077] In some embodiments, processor 12 may be a central processing unit (CPU), controller, microcontroller, microprocessor or other data processing chip, used to run program code stored in memory 11 or process data, such as executing computer programs.

[0078] The input / output bus 13 can be a peripheral component interconnect (PCI) bus or an extended industry standard architecture (EISA) bus, etc. This bus can be divided into address bus, data bus, control bus, etc.

[0079] Furthermore, the computer device may also include a wired or wireless network interface 14, which may optionally include a wired interface and / or a wireless interface (such as a Wi-Fi interface, a Bluetooth interface, etc.), typically used to establish communication connections between the computer device 1 and other electronic devices.

[0080] Optionally, the computer device 1 may further include a user interface, which may include a display, an input unit such as a keyboard, and optionally, a standard wired interface or a wireless interface. Optionally, in some embodiments, the display may be an LED display, a liquid crystal display, a touch-sensitive liquid crystal display, or an OLED (Organic Light-Emitting Diode) touchscreen, etc. The display may also be appropriately referred to as a screen or display unit, used to display information processed in the computer device 1 and to display a visual user interface.

[0081] Figure 3 Only computer device 1 with components 11-14 and computer programs is shown; those skilled in the art will understand that... Figure 3 The structure shown does not constitute a limitation on the computer device 1, and may include fewer or more components than shown, or combine certain components, or have different component arrangements.

[0082] This application also provides a computer-readable storage medium storing a computer program, which, when executed by a processor, can perform the following functions: Figure 1 The steps in the method embodiments shown, for example Figure 1 Steps 101 to 103 are shown. Alternatively, the processor executes a computer program to implement the functions of each module or unit in the above-described device embodiments.

[0083] In the several embodiments provided in this application, it should be understood that the disclosed systems, apparatuses, and methods can be implemented in other ways. For example, the apparatus embodiments described above are merely illustrative; for instance, the division of units is only a logical functional division, and in actual implementation, there may be other division methods. For example, multiple units or components may be combined or integrated into another system, or some features may be ignored or not executed. Furthermore, the coupling or direct coupling or communication connection shown or discussed may be an indirect coupling or communication connection between apparatuses or units through some interfaces, and may be electrical, mechanical, or other forms.

[0084] The units described as separate components may or may not be physically separate. The components shown as units may or may not be physical units; that is, they may be located in one place or distributed across multiple network units. Some or all of the units can be selected to achieve the purpose of this embodiment according to actual needs.

[0085] Furthermore, the functional units in the various embodiments of this application can be integrated into one processing unit, or each unit can exist physically separately, or two or more units can be integrated into one unit. The integrated unit can be implemented in hardware or as a software functional unit.

[0086] If the integrated unit is implemented as 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 this application, in essence, or the part that contributes to the prior art, or all or part of the 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 to cause a computer device (which may be a personal computer, server, or network device, etc.) to execute all or part of the steps of the methods described in the various embodiments of this application. The aforementioned storage medium includes various media capable of storing program code, such as USB flash drives, portable hard drives, read-only memory (ROM), random access memory (RAM), magnetic disks, or optical disks.

[0087] The above-disclosed content is only used to illustrate the technical solutions of this application, and not to limit them; although this application has been described in detail with reference to the foregoing embodiments, those skilled in the art should understand that they can still modify the technical solutions described in the foregoing embodiments, or make equivalent substitutions for some of the technical features; and these modifications or substitutions 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 this application.

Claims

1. A method of scanning control of a laser direct writing apparatus, characterized by, The method, applied to a laser array movable in both horizontal and vertical directions, includes: Acquire image data of the original raster image, wherein the image data includes at least the position parameters of the pixel exposure points in each pixel row; A scanning strategy selection instruction is obtained, which indicates the target scanning strategy selected from multiple scanning strategies. Each scanning strategy indicates the equally spaced, skip-scanning order of each pixel row. The method of obtaining the scanning strategy selection instruction includes: when parameters such as the type and thickness of the photosensitive emulsion are not fixed, calculating a weighted value based on the current value of each parameter and the preset weight of each parameter in actual application, and using the scanning strategy associated with the target interval where the weighted value is located as the target scanning strategy. Each parameter includes at least the size of the area where the photosensitive coating is located, the type of photosensitive emulsion, and the coating thickness. The position parameters of the pixel exposure points in each pixel row are read according to the scanning order in the target scanning strategy, and the laser array is controlled to scan the mapping area of ​​each pixel row on the photosensitive coating according to the scanning order in the target scanning strategy, and the position of the pixel exposure point of each pixel row is exposed during the scanning process.

2. The method of claim 1, wherein, The image data also includes the resolution of the original raster image, and the method further includes: The spacing between adjacent rows of pixels is calculated based on the resolution of the original raster image, and the mapping area of ​​each pixel row in the original raster image on the photosensitive coating is determined based on the spacing between adjacent rows of pixels.

3. The method of claim 1, wherein, Before controlling the laser array to scan the mapped regions of each pixel row on the photosensitive coating according to the scanning order in the target scanning strategy, the method further includes: Obtain the offset of each laser in the laser array relative to a preset reference point; The pixel exposure points in the pixel rows that each laser needs to scan are shifted along the scanning direction, so that the shift amount is equal to the offset of each laser relative to the preset reference point.

4. A control system characterized by, include: The first acquisition module is used to acquire image data of the original raster image, wherein the image data includes at least the position parameters of the pixel exposure points in each pixel row; The second acquisition module is used to acquire a scanning strategy selection instruction. The scanning strategy selection instruction indicates the target scanning strategy selected from multiple scanning strategies, and each scanning strategy indicates the equally spaced, skip-scanning order of each pixel row. Acquiring the scanning strategy selection instruction includes: when parameters such as the type and thickness of the photosensitive emulsion are not fixed, calculating a weighted value based on the current value of each parameter and the preset weight of each parameter in actual application, and using the scanning strategy associated with the target interval where the weighted value is located as the target scanning strategy; each parameter includes at least the size of the area where the photosensitive coating is located, the type of photosensitive emulsion, and the coating thickness. The control module is used to read the position parameters of the pixel exposure points in each pixel row according to the scanning order in the target scanning strategy, and control the laser array to scan the mapping area of ​​each pixel row on the photosensitive coating according to the scanning order in the target scanning strategy, and expose the position of the pixel exposure points in each pixel row during the scanning process.

5. The system of claim 4, wherein, Also includes: The mapping module is configured to acquire a resolution of the original raster image, and determine a mapping area of each pixel row in the original raster image on the photosensitive coating according to a distance between adjacent rows of pixels.

6. The system of claim 4, wherein, Further comprising: The third acquisition module is configured to acquire an offset of each laser in the laser array relative to a preset reference point. The adjustment module is configured to displace a pixel exposure point in a pixel row that each laser needs to scan along a scanning direction, so that the displacement is equal to the offset of the respective laser relative to the preset reference point.

7. A computer apparatus, comprising: The computer device comprises a processor configured to implement the method of any one of claims 1 to 3 when executing a computer program stored in a memory.

8. A computer readable storage medium having stored thereon a computer program, characterized in that: The computer program is configured to implement the method of any one of claims 1 to 3 when executed by a processor.

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