A small-size PCB board spraying method, device, equipment and medium

Abstract

This invention discloses a method, apparatus, device, and medium for printing small-sized PCBs. The method includes: acquiring desired layout information of multiple small-sized PCBs to be printed simultaneously on a printing table; acquiring the actual coordinates of each PCB and its corresponding target points after fixing each PCB to the table; determining position compensation information for each PCB based on the actual and desired coordinates; and copying the target image corresponding to each PCB to the same actual printing image for simultaneous printing based on the position compensation information. This invention, through a rational design of the table module layout, enables combined printing of multiple PCBs on a single printing table, solving the problem in traditional printing methods where only one PCB can be printed per table at a time. This significantly improves printing efficiency and increases customer productivity.

Description

Technical Field

[0001] This invention relates to the field of inkjet printing technology, and in particular to a method, apparatus, equipment, and medium for printing on small-sized PCB boards. Background Technology

[0002] Inkjet printing technology is based on the working principle of additive manufacturing. According to the design and processing data of the PCB substrate, it uses CCD to accurately position the pattern and spray specific solder mask ink onto the circuit board, thereby completing the PCB printing process.

[0003] Currently, mainstream inkjet printing equipment on the market typically prints only one PCB board per worktable, such as... Figure 1 As shown, the design and manufacturing data for a PCB is usually consistent with the actual dimensions of the PCB substrate. The customer designs the corresponding printing data based on the PCB dimensions, and the data is then processed using fixtures in the table mold. Figure 1 (The arrow on the middle platform module) is used for coarse positioning. The PCB board is fixed on the platform. The alignment calculation is performed based on the actual coordinates and theoretical coordinates of the target points on the substrate captured by the CCD camera before the final printing is performed.

[0004] However, considering the versatility of the equipment, the tabletop module is often larger than the PCB board. If only a small PCB board is placed on the tabletop, the tabletop space cannot be used efficiently, and the printing efficiency is also limited. Summary of the Invention

[0005] Based on this, the present invention provides a method, apparatus, equipment and medium for printing small-sized PCB boards, in order to solve the problem that in traditional printing methods, only one small-sized PCB board can be printed on a table at a time, resulting in low printing efficiency.

[0006] Firstly, a method for printing on small-sized PCB boards is provided, the method comprising:

[0007] Obtain the desired layout information of multiple small-sized PCBs to be printed simultaneously on the table, wherein the desired layout information includes the desired coordinates corresponding to at least two target points of each PCB.

[0008] Obtain the actual coordinates of each PCB and each target point on each PCB after fixing each PCB to the table.

[0009] Based on the actual coordinates and expected coordinates of each target point on each PCB board, determine the position compensation information corresponding to each PCB board.

[0010] Based on the position compensation information corresponding to each PCB board, the target image corresponding to each PCB board is copied to the same actual printing image, and the actual printing image is used to print each PCB board simultaneously.

[0011] Secondly, a printing apparatus for small-sized PCB boards is provided, the apparatus comprising:

[0012] The layout information acquisition module is used to acquire the expected layout information of multiple small-sized PCBs to be printed simultaneously on the table. The expected layout information includes the expected coordinates corresponding to at least two target points of each PCB.

[0013] The target point actual coordinate acquisition module is used to acquire the actual coordinates of each target point on each PCB after fixing each PCB on the table.

[0014] The position compensation information determination module is used to determine the position compensation information corresponding to each PCB board based on the actual coordinates and expected coordinates of each target point on each PCB board.

[0015] The inkjet printing module is used to copy the target image corresponding to each PCB board to the same actual inkjet image based on the position compensation information corresponding to each PCB board, and use the actual inkjet image to print each PCB board simultaneously.

[0016] According to another aspect of the present invention, an electronic device is provided, the electronic device comprising:

[0017] At least one processor; and

[0018] A memory communicatively connected to the at least one processor; wherein,

[0019] The memory stores a computer program that can be executed by the at least one processor, which enables the at least one processor to perform a printing method for a small-sized PCB board according to any embodiment of the present invention.

[0020] According to another aspect of the present invention, a computer-readable storage medium is provided, the computer-readable storage medium storing computer instructions for causing a processor to execute and implement a printing method for a small-size PCB board as described in any embodiment of the present invention.

[0021] The technical solution of this invention, through a reasonable design of the table module layout, enables the combined printing of multiple PCB boards on one printing table, solving the problem of low printing efficiency caused by the traditional printing method where only one PCB board can be printed at a time on one table. This greatly improves printing efficiency and also increases customer productivity.

[0022] It should be understood that the description in this section is not intended to identify key or essential features of the embodiments of the present invention, nor is it intended to limit the scope of the invention. Other features of the invention will become readily apparent from the following description. Attached Figure Description

[0023] To more clearly illustrate the technical solutions in the embodiments of the present invention, the accompanying drawings used in the description of the embodiments will be briefly introduced below. Obviously, the accompanying drawings described below are only some embodiments of the present invention. For those skilled in the art, other drawings can be obtained based on these drawings without creative effort.

[0024] Figure 1 This is a schematic diagram of a mainstream inkjet printing method under current technology;

[0025] Figure 2 This is a flowchart of a printing method for a small-sized PCB board according to Embodiment 1 of the present invention;

[0026] Figure 3 This is a schematic diagram of a target location applicable to the implementation of the present invention;

[0027] Figure 4 This is a flowchart of another inkjet printing method for a small-sized PCB board according to Embodiment 2 of the present invention;

[0028] Figure 5 This is a reference drawing of a 2×2 layout design for a PCB board applicable to the implementation of the present invention;

[0029] Figure 6 This is a schematic diagram of a combined inkjet printing of multiple PCB boards applicable to an embodiment of the present invention;

[0030] Figure 7 This is a schematic diagram of the structure of a printing device for a small-sized PCB board according to Embodiment 3 of the present invention;

[0031] Figure 8 This is a schematic diagram of the structure of an electronic device that implements a small-size PCB printing method according to an embodiment of the present invention. Detailed Implementation

[0032] To enable those skilled in the art to better understand the present invention, the technical solutions of the present invention will be clearly and completely described below with reference to the accompanying drawings of the embodiments of the present invention. Obviously, the described embodiments are only some embodiments of the present invention, and not all embodiments. Based on the embodiments of the present invention, all other embodiments obtained by those skilled in the art without creative effort should fall within the scope of protection of the present invention.

[0033] It should be noted that the terms "first," "second," etc., in the specification, claims, and accompanying drawings of this invention 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 where appropriate so that the embodiments of the invention described herein can be implemented in orders other than those illustrated or described herein. Furthermore, the terms "comprising" and "having," and any variations thereof, are intended to cover a non-exclusive inclusion; for example, a process, method, system, product, or apparatus that comprises a series of steps or units is not necessarily limited to those steps or units explicitly listed, but may include other steps or units not explicitly listed or inherent to such processes, methods, products, or apparatus.

[0034] Example 1

[0035] Figure 2 This is a flowchart of a printing method for a small-sized PCB board according to Embodiment 1 of the present invention. This embodiment is applicable to the situation of printing multiple PCB boards in combination. The method can be executed by a printing device for small-sized PCB boards, which can be implemented in hardware and / or software, and can be configured in a digital inkjet printer. Figure 2 As shown, the method includes:

[0036] S210. Obtain the desired layout information of multiple small-sized PCBs to be printed simultaneously on the table, wherein the desired layout information includes the desired coordinates corresponding to at least two target points of each PCB.

[0037] In several printing tasks, the table module serves as a carrier for placing PCB boards. The expected layout information refers to the design layout scheme adapted to the current table module, which is formulated in advance based on the size of the PCB and the corresponding printing materials. In other words, it is how to arrange several PCB boards on the same table to maximize the use of table space.

[0038] The target points on a PCB, also called mark points, are the positioning points used by pick-and-place machines. Because PCBs provide common measurable points for all steps in the assembly process during mass production, each piece of equipment used in assembly can accurately position the circuit pattern to achieve precision. If we use mark points on the circuit board, the machine can place components better and with higher accuracy.

[0039] like Figure 3As shown, in the prior art, 3 to 4 target points are usually set as alignment target points for PCB boards. Since the present invention provides a method for printing multiple PCBs in combination, at least two target points are set on each PCB board. The position coordinates can be obtained by searching and locating the target points. The expected coordinates refer to the theoretical position coordinates of the target points calculated by the algorithm.

[0040] S220. Obtain the actual coordinates of each target point on each PCB after fixing each PCB on the table.

[0041] Based on the size of the PCB board, the printing materials corresponding to each PCB board are designed. Then, the PCB board is fixed on the table using the clamps in the table module. Once the PCB board is initially fixed on the table, the actual coordinate values ​​of the PCB target points can be obtained.

[0042] S230. Determine the position compensation information corresponding to each PCB board based on the actual coordinates and expected coordinates of each target point on each PCB board.

[0043] Due to the influence of fixtures or other factors, the actual position coordinates and theoretical position coordinates of the target points on the PCB board may deviate. Introducing position compensation information can fine-tune the printing angle and position of the inkjet data, thereby enabling the output printed image to be as close as possible to the preset printing effect without being affected by the deviation.

[0044] S240. Based on the position compensation information corresponding to each PCB board, copy the target image corresponding to each PCB board to the same actual printing image, and use the actual printing image to print each PCB board simultaneously.

[0045] Since the position compensation information of the target point can be calculated in each PCB board, the target image corresponding to each PCB board can be adjusted according to its corresponding position compensation information. The adjusted target image is copied to the position corresponding to the final printed image according to the pre-designed layout. Multiple small target images are arranged according to the layout to form a large actual printed image. Finally, the generated large actual printed image is sent to the printing module, which can realize the combined printing of multiple PCB boards on the same table.

[0046] Optionally, based on the position compensation information corresponding to each PCB board, the target image corresponding to each PCB board is copied to the same actual printing image, which may include:

[0047] Obtain the standard image position of the target image corresponding to each PCB board in the inkjet image, wherein the standard image position is associated with the expected coordinates of the PCB board;

[0048] Based on the standard image position of the target image corresponding to each PCB board in the inkjet image, and the position compensation information corresponding to each PCB board, determine the adjusted image position of each target image in the inkjet image.

[0049] Based on the adjusted image position of each target image in the inkjet image, the target image corresponding to each PCB board is copied to the same actual inkjet image.

[0050] Specifically, the standard image position refers to the theoretical printing position in the final printed image that is initially determined based on the expected coordinates. Since the position compensation information is determined based on the expected coordinates, the actual printing position in the printed image also changes after the standard image position is adjusted by the position compensation information. Finally, the target image is copied to the final printed image according to the adjusted image position.

[0051] Optionally, before simultaneously printing each PCB board using the actual inkjet image, the following may also be included:

[0052] Based on the actual coordinates corresponding to each target point on each PCB board, determine the first outer edge size information of the actual inkjet image composed of each target image; based on the expected coordinates corresponding to each target point on each PCB board, determine the second outer edge size information of the expected inkjet image composed of each target image.

[0053] Based on the first outer edge dimension information and the second outer edge dimension information, determine the expansion and contraction compensation value corresponding to the actual printed image, and use the expansion and contraction compensation value to adjust the expansion and contraction of the actual printed image.

[0054] Since there is a deviation between the first outer edge size of the actual printed image generated according to the actual coordinate information of each target point and the second outer edge size of the expected printed image generated according to the theoretical coordinate information, it is necessary to calculate the expansion and contraction compensation value of the actual printed image based on the edge size information, and then perform expansion and contraction processing on the actual printed image based on the expansion and contraction compensation value.

[0055] This invention provides a novel method for printing small-sized PCBs on a printing table. Through a well-designed table layout, multiple PCBs can be printed simultaneously on a single printing table. This solves the problem of low printing efficiency caused by the traditional method where only one PCB can be printed at a time. This significantly improves printing efficiency and increases customer productivity.

[0056] Example 2

[0057] Figure 4 This is a flowchart of another inkjet printing method for a small-sized PCB board provided in Embodiment 2 of the present invention. This embodiment is a refinement based on the above embodiment, and correspondingly, as shown... Figure 4 As shown, the method specifically includes:

[0058] S410. Determine the layout position of each PCB on the table based on the number of PCBs to be printed simultaneously and the preset layout strategy.

[0059] Furthermore, assuming that the number of PCBs to be printed simultaneously is 4, the layout strategy is a 2-row, 2-column layout with horizontal and vertical alignment respectively.

[0060] This invention provides a supplementary explanation using the printing method of four small-sized PCBs as an example. For instance... Figure 5 As shown, the four small PCBs are arranged in a 2×2 layout.

[0061] S420. Obtain the reference PCB board from each PCB board, and obtain the desired coordinates corresponding to the four corner points of the reference PCB board.

[0062] Specifically, it can be Figure 5 PCB 1 is considered the reference PCB board for this printing task, and the four corners of PCB 1 can be referenced. Figure 3For the four points A, B, C, and D, first obtain the expected (theoretical) coordinate values ​​of the four points A, B, C, and D. If the coordinates of target point A (Mark1) are represented as (Ax, Ay); the coordinates of target point B (Mark2) are represented as (Bx, By); then the coordinates of target point C are represented as (Cx, Cy); and the coordinates of target point D are represented as (Dx, Dy).

[0063] S430. Based on the expected coordinates corresponding to the four corner points of the reference PCB board and the layout strategy, determine the expected coordinates corresponding to at least two target points of each PCB board.

[0064] Furthermore, the target point coordinates of other PCB boards can be calculated based on the coordinates of the four points. To maximize printing efficiency, compared to traditional printing methods that require obtaining the coordinates of four target points for each PCB board, this invention creatively proposes obtaining the coordinates of at least two target points for each PCB board.

[0065] Optionally, based on the desired coordinates corresponding to the four corner points of the reference PCB board and the layout strategy, determining the desired coordinates corresponding to at least two target points of each PCB board may include:

[0066] Based on the desired coordinates of the four corner points of the reference PCB board for the top left corner layout, as well as the preset horizontal and vertical PCB board spacing, the desired coordinates corresponding to the two target points of each PCB board are determined.

[0067] Among them, the target points of the two PCBs with the top left and top right layouts are the two corner points of the upper edge of the PCB board, and the target points of the two PCBs with the bottom left and bottom right layouts are the two corner points of the lower edge of the PCB board.

[0068] Specifically, Figure 6 This is a schematic diagram of the layout of four PCB boards according to an embodiment of the present invention. Figure 6 It can be seen that there is a certain distance between each PCB board, including horizontal and vertical spacing. Therefore, the expected coordinates of the target points of PCB 2, PCB 3 and PCB 4 can be obtained by adding a certain spacing value to the coordinates of the four points A, B, C and D.

[0069] If we define the horizontal interval as X and the vertical interval as Y, then the vertical position coordinates of Mark3 are (Cx, Cy+Y) based on the original target point C with the addition of the vertical interval value Y. Similarly, the vertical position coordinates of Mark4 are (Dx, By+Y) based on the original target point D with the addition of the vertical interval value Y. Likewise, the theoretical position coordinates of PCB 3 (Mark5, Mark6) and PCB 4 (Mark7, Mark8) can be obtained as (Ax+X, Ay), (Bx+X, By), (Cx+X, Cy+Y), and (Dx+X, Dy+Y), respectively.

[0070] S440: Take pictures of each PCB board fixed on the table using a pre-set drive camera, and obtain the actual coordinates corresponding to each target point on each PCB board based on the shooting results.

[0071] The driving camera typically refers to a movable CCD camera. The driving camera can find the corresponding eight target points based on the theoretical coordinate values ​​obtained in the above embodiments, and then obtain the actual coordinate values ​​of the eight target point positions.

[0072] S450. Based on the actual coordinates and expected coordinates corresponding to each target point on each PCB board, calculate the translational offset information and angular offset information corresponding to each PCB board.

[0073] Because there is a deviation between the actual coordinates and the expected coordinates, it is necessary to calculate the offset information of each target point of each PCB using the actual coordinates and theoretical coordinates. For example, the actual and theoretical coordinates of Mark1 and Mark2 can be used to calculate the translational and angular offset information of PCB 1. Similarly, Mark3 and Mark4 can be used to calculate the translational and angular offset information of PCB 2; Mark5 and Mark6 can be used to calculate the translational and angular offset information of PCB 3; and Mark7 and Mark8 can be used to calculate the translational and angular offset information of PCB 4.

[0074] S460. Based on the translation offset information and angle offset information corresponding to each PCB board, determine the translation compensation information and angle compensation information corresponding to each PCB board as position compensation information.

[0075] S470. Based on the position compensation information corresponding to each PCB board, copy the target image corresponding to each PCB board to the same actual printing image, and use the actual printing image to print each PCB board simultaneously.

[0076] By rotating and translating the target images corresponding to PCB1, PCB2, PCB3 and PCB4 according to the position compensation information, and copying the adjusted target images to the final actual inkjet image, the final combined printing is achieved.

[0077] It should be noted that after the actual printed image is generated, such as Figure 5 As shown, the target points for the two PCBs in the top left and top right corner layouts are Mark1 and Mark6, while the target points for the two PCBs in the bottom left and bottom right corner layouts are Mark3 and Mark8. The scaling compensation values ​​for the actual printed image are calculated based on the actual and theoretical coordinates of the four corner points at the top and bottom edges. These scaling compensation values ​​are then used to perform scaling processing on the complete image to be printed, completing the final adjustment of the output image. This significantly improves production efficiency while maintaining accuracy.

[0078] This invention further clarifies the printing method for small-sized PCBs by refining the overall solution. Specifically, it proposes a method for determining the upper and lower edge corner points and their specific functions. Using four PCBs as an example, it explains the theoretical coordinate calculation method for eight target points. Finally, it introduces translational and angular offset information to improve the accuracy of the printed image. Through a reasonable design of the table module layout and fine-tuning of the printed image, this invention maximizes the printing efficiency of small-sized PCBs while ensuring printing accuracy.

[0079] Example 3

[0080] Figure 7 This is a schematic diagram of a printing device for a small-sized PCB board provided in Embodiment 3 of the present invention. Figure 7 As shown, the device includes:

[0081] The layout information acquisition module 710 is used to acquire the expected layout information of multiple small-sized PCBs to be printed simultaneously on the table, wherein the expected layout information includes the expected coordinates corresponding to at least two target points of each PCB.

[0082] The target point actual coordinate acquisition module 720 is used to acquire the actual coordinates of each target point on each PCB after each PCB is fixed on the table.

[0083] The position compensation information determination module 730 is used to determine the position compensation information corresponding to each PCB board based on the actual coordinates and expected coordinates corresponding to each target point of each PCB board.

[0084] The inkjet printing module 740 is used to copy the target image corresponding to each PCB board to the same actual inkjet image according to the position compensation information corresponding to each PCB board, and use the actual inkjet image to print each PCB board simultaneously.

[0085] In this embodiment of the invention, the layout information acquisition module 710 acquires the desired layout information of multiple small-sized PCBs to be printed simultaneously on the printing table; the target point actual coordinate acquisition module 720 acquires the actual coordinates corresponding to each target point of each PCB after fixing each PCB on the printing table; the position compensation information determination module 730 determines the position compensation information corresponding to each PCB based on the actual coordinates and desired coordinates corresponding to each target point of each PCB; the inkjet image printing module 740 copies the target image corresponding to each PCB to the same actual inkjet image based on the position compensation information corresponding to each PCB, and uses the actual inkjet image to print each PCB simultaneously. This embodiment of the invention provides a new inkjet printing method for small-sized PCBs. Through a reasonable design of the printing table module layout, multiple PCBs can be combined and printed on one printing table, solving the problem of low printing efficiency caused by the traditional inkjet printing method where only one PCB can be printed on one table at a time. This greatly improves printing efficiency and also increases customer productivity.

[0086] Optionally, based on the above embodiments, the layout information acquisition module 710 may include:

[0087] The layout position determination unit is used to determine the layout position of each PCB board on the table based on the number of PCB boards to be printed simultaneously and the preset layout strategy.

[0088] The reference PCB board expected coordinate acquisition unit is used to acquire the reference PCB board among all PCB boards and acquire the expected coordinates corresponding to the four corner points of the reference PCB board.

[0089] Other PCB board expected coordinate acquisition units are used to determine the expected coordinates corresponding to at least two target points of each PCB board based on the expected coordinates corresponding to the four corner points of the reference PCB board and the layout strategy.

[0090] Optionally, based on the above embodiments, the number of PCBs to be printed simultaneously is 4, and the layout strategy is a 2-row, 2-column layout aligned in both the horizontal and vertical directions.

[0091] Based on the desired coordinates corresponding to the four corner points of the reference PCB board and the layout strategy, determine the desired coordinates corresponding to at least two target points of each PCB board, including:

[0092] Based on the desired coordinates of the four corner points of the reference PCB board for the top left corner layout, as well as the preset horizontal and vertical PCB board spacing, the desired coordinates corresponding to the two target points of each PCB board are determined.

[0093] Among them, the target points of the two PCBs with the top left and top right layouts are the two corner points of the upper edge of the PCB board, and the target points of the two PCBs with the bottom left and bottom right layouts are the two corner points of the lower edge of the PCB board.

[0094] Optionally, based on the above embodiments, the target point actual coordinate acquisition module 720 may include:

[0095] The actual coordinate acquisition unit for each PCB board is used to take pictures of each PCB board fixed on the table using a pre-set driving camera, and to obtain the actual coordinates corresponding to each target point of each PCB board based on the shooting results.

[0096] Optionally, based on the above embodiments, the position compensation information determination module 730 may include:

[0097] Angle offset information calculation unit is used to calculate the translation offset information and angle offset information corresponding to each PCB board based on the actual coordinates and expected coordinates of each target point on each PCB board.

[0098] The position compensation information calculation unit is used to determine the translation compensation information and angle offset information corresponding to each PCB board as position compensation information based on the translation offset information and angle offset information corresponding to each PCB board.

[0099] Optionally, based on the above embodiments, the inkjet image printing module 740 may include:

[0100] A standard image position acquisition unit is used to acquire the standard image position of the target image corresponding to each PCB board in the inkjet image, wherein the standard image position is associated with the expected coordinates of the PCB board;

[0101] The image position determination unit is used to determine the adjusted image position of each target image in the inkjet image based on the standard image position of the target image corresponding to each PCB board in the inkjet image and the position compensation information corresponding to each PCB board.

[0102] The target image copying unit is used to copy the target image corresponding to each PCB board to the same actual inkjet image according to the adjusted image position of each target image in the inkjet image.

[0103] Optionally, based on the above embodiments, before simultaneously printing each PCB board using the actual inkjet image, the following may also be included:

[0104] The edge size information determination unit is used to determine the first outer edge size information of the actual inkjet image actually composed of each target image based on the actual coordinates corresponding to each target point of each PCB board; and to determine the second outer edge size information of the expected inkjet image expected to be composed of each target image based on the expected coordinates corresponding to each target point of each PCB board.

[0105] The expansion and contraction adjustment unit is used to determine the expansion and contraction compensation value corresponding to the actual printed image based on the first outer edge size information and the second outer edge size information, and to use the expansion and contraction compensation value to adjust the expansion and contraction of the actual printed image.

[0106] The inkjet printing device for small-sized PCB boards provided in this embodiment of the invention can execute the inkjet printing method for small-sized PCB boards provided in any embodiment of the invention, and has the corresponding functional modules and beneficial effects of the method.

[0107] Example 4

[0108] Figure 8 A schematic diagram of an electronic device 10, which can be used to implement embodiments of the present invention, is shown. The electronic device is intended to represent various forms of digital computers, such as laptop computers, desktop computers, workstations, personal digital assistants, servers, blade servers, mainframe computers, and other suitable computers. The electronic device can also represent various forms of mobile devices, such as personal digital processors, cellular phones, smartphones, wearable devices (e.g., helmets, glasses, watches, etc.), and other similar computing devices. The components shown herein, their connections and relationships, and their functions are merely illustrative and are not intended to limit the implementation of the invention described and / or claimed herein.

[0109] like Figure 8 As shown, the electronic device 10 includes at least one processor 11 and a memory, such as a read-only memory (ROM) 12 or a random access memory (RAM) 13, communicatively connected to the at least one processor 11. The memory stores computer programs executable by the at least one processor. The processor 11 can perform various appropriate actions and processes based on the computer program stored in the ROM 12 or loaded from storage unit 18 into the RAM 13. The RAM 13 can also store various programs and data required for the operation of the electronic device 10. The processor 11, ROM 12, and RAM 13 are interconnected via a bus 14. An input / output (I / O) interface 15 is also connected to the bus 14.

[0110] Multiple components in electronic device 10 are connected to I / O interface 15, including: input unit 16, such as keyboard, mouse, etc.; output unit 17, such as various types of displays, speakers, etc.; storage unit 18, such as disk, optical disk, etc.; and communication unit 19, such as network card, modem, wireless transceiver, etc. Communication unit 19 allows electronic device 10 to exchange information / data with other devices through computer networks such as the Internet and / or various telecommunications networks.

[0111] Processor 11 can be a variety of general-purpose and / or special-purpose processing components with processing and computing capabilities. Some examples of processor 11 include, but are not limited to, a central processing unit (CPU), a graphics processing unit (GPU), various special-purpose artificial intelligence (AI) computing chips, various processors running machine learning model algorithms, a digital signal processor (DSP), and any suitable processor, controller, microcontroller, etc. Processor 11 performs the various methods and processes described above, such as a method for inkjet printing on a small-size PCB board.

[0112] That is: to obtain the expected layout information of multiple small PCBs to be printed simultaneously on the table, wherein the expected layout information includes the expected coordinates corresponding to at least two target points of each PCB.

[0113] After fixing each PCB to the table, obtain the actual coordinates corresponding to each target point on each PCB.

[0114] Based on the actual coordinates and expected coordinates of each target point on each PCB board, determine the position compensation information corresponding to each PCB board.

[0115] Based on the position compensation information corresponding to each PCB board, the target image corresponding to each PCB board is copied to the same actual printing image, and the actual printing image is used to print each PCB board simultaneously.

[0116] In some embodiments, a method for printing on a small-sized PCB board can be implemented as a computer program tangibly contained in a computer-readable storage medium, such as storage unit 18. In some embodiments, part or all of the computer program can be loaded and / or installed on electronic device 10 via ROM 12 and / or communication unit 19. When the computer program is loaded into RAM 13 and executed by processor 11, one or more steps of the method for printing on a small-sized PCB board described above can be performed. Alternatively, in other embodiments, processor 11 can be configured to perform a method for printing on a small-sized PCB board by any other suitable means (e.g., by means of firmware).

[0117] Various embodiments of the systems and techniques described above herein can be implemented in digital electronic circuit systems, integrated circuit systems, field-programmable gate arrays (FPGAs), application-specific integrated circuits (ASICs), application-specific standard products (ASSPs), systems-on-a-chip (SoCs), payload-programmable logic devices (CPLDs), computer hardware, firmware, software, and / or combinations thereof. These various embodiments may include implementations in one or more computer programs that can be executed and / or interpreted on a programmable system including at least one programmable processor, which may be a dedicated or general-purpose programmable processor, capable of receiving data and instructions from a storage system, at least one input device, and at least one output device, and transmitting data and instructions to the storage system, the at least one input device, and the at least one output device.

[0118] Computer programs used to implement the methods of the present invention may be written in any combination of one or more programming languages. These computer programs may be provided to a processor of a general-purpose computer, a special-purpose computer, or other programmable data processing device, such that when executed by the processor, the computer programs cause the functions / operations specified in the flowcharts and / or block diagrams to be performed. The computer programs may be executed entirely on a machine, partially on a machine, or as a standalone software package, partially on a machine and partially on a remote machine, or entirely on a remote machine or server.

[0119] In the context of this invention, a computer-readable storage medium can be a tangible medium that may contain or store a computer program for use by or in conjunction with an instruction execution system, apparatus, or device. A computer-readable storage medium may include, but is not limited to, electronic, magnetic, optical, electromagnetic, infrared, or semiconductor systems, apparatus, or devices, or any suitable combination thereof. Alternatively, a computer-readable storage medium may be a machine-readable signal medium. More specific examples of machine-readable storage media include electrical connections based on one or more wires, portable computer disks, hard disks, random access memory (RAM), read-only memory (ROM), erasable programmable read-only memory (EPROM or flash memory), optical fibers, portable compact disk read-only memory (CD-ROM), optical storage devices, magnetic storage devices, or any suitable combination thereof.

[0120] To provide interaction with a user, the systems and techniques described herein can be implemented on an electronic device having: a display device (e.g., a CRT (cathode ray tube) or LCD (liquid crystal display) monitor) for displaying information to the user; and a keyboard and pointing device (e.g., a mouse or trackball) through which the user provides input to the electronic device. Other types of devices can also be used to provide interaction with the user; for example, feedback provided to the user can be any form of sensory feedback (e.g., visual feedback, auditory feedback, or tactile feedback); and input from the user can be received in any form (including sound input, voice input, or tactile input).

[0121] The systems and technologies described herein can be implemented in computing systems that include backend components (e.g., as data servers), or middleware components (e.g., application servers), or frontend components (e.g., user computers with graphical user interfaces or web browsers through which users can interact with implementations of the systems and technologies described herein), or any combination of such backend, middleware, or frontend components. The components of the system can be interconnected via digital data communication of any form or medium (e.g., communication networks). Examples of communication networks include local area networks (LANs), wide area networks (WANs), blockchain networks, and the Internet.

[0122] A computing system can include clients and servers. Clients and servers are generally located far apart and typically interact through communication networks. The client-server relationship is created by computer programs running on the respective computers and having a client-server relationship with each other. The server can be a cloud server, also known as a cloud computing server or cloud host, which is a hosting product within the cloud computing service system to address the shortcomings of traditional physical hosts and VPS services, such as high management difficulty and weak business scalability.

[0123] It should be understood that the various forms of processes shown above can be used, with steps reordered, added, or deleted. For example, the steps described in this invention can be executed in parallel, sequentially, or in different orders, as long as the desired result of the technical solution of this invention can be achieved, and this is not limited herein.

[0124] The specific embodiments described above do not constitute a limitation on the scope of protection of this invention. Those skilled in the art should understand that various modifications, combinations, sub-combinations, and substitutions can be made according to design requirements and other factors. Any modifications, equivalent substitutions, and improvements made within the spirit and principles of this invention should be included within the scope of protection of this invention.

Claims

1. A method for inkjet printing on small-sized PCB boards, characterized in that, include: Obtain the desired layout information of multiple small-sized PCBs to be printed simultaneously on the table, including: determining the layout position of each PCB on the table based on the number of PCBs to be printed simultaneously and the preset layout strategy. Obtain a reference PCB board from each PCB board, and obtain the desired coordinates corresponding to the four corner points of the reference PCB board; Based on the desired coordinates corresponding to the four corner points of the reference PCB board and the layout strategy, the desired coordinates corresponding to at least two target points of each PCB board are determined; wherein, the desired layout information includes the desired coordinates corresponding to at least two target points of each PCB board. After fixing each PCB to the table, obtain the actual coordinates corresponding to each target point on each PCB. Based on the actual coordinates and expected coordinates of each target point on each PCB board, determine the position compensation information corresponding to each PCB board. Based on the position compensation information corresponding to each PCB board, the target image corresponding to each PCB board is copied to the same actual printing image, and the actual printing image is used to print each PCB board simultaneously. Specifically, based on the position compensation information corresponding to each PCB board, the target image corresponding to each PCB board is copied into the same actual printing image, including: Obtain the standard image position of the target image corresponding to each PCB board in the inkjet image, wherein the standard image position is associated with the expected coordinates of the PCB board; Based on the standard image position of the target image corresponding to each PCB board in the inkjet image, and the position compensation information corresponding to each PCB board, the adjusted image position of each target image in the inkjet image is determined. Based on the adjusted image position of each target image in the inkjet image, the target image corresponding to each PCB board is copied to the same actual inkjet image.

2. The method according to claim 1, characterized in that, The number of PCBs to be printed simultaneously is 4, and the layout strategy is a 2-row, 2-column layout with horizontal and vertical alignment respectively. Based on the desired coordinates corresponding to the four corner points of the reference PCB board and the layout strategy, determine the desired coordinates corresponding to at least two target points of each PCB board, including: Based on the desired coordinates of the four corner points of the reference PCB board for the top left corner layout, as well as the preset horizontal and vertical PCB board spacing, the desired coordinates corresponding to the two target points of each PCB board are determined. Among them, the target points of the two PCBs with the top left and top right layouts are the two corner points of the upper edge of the PCB board, and the target points of the two PCBs with the bottom left and bottom right layouts are the two corner points of the lower edge of the PCB board.

3. The method according to claim 1, characterized in that, After fixing each PCB to the platform, obtain the actual coordinates corresponding to each target point on each PCB, including: The pre-set driving camera takes pictures of each PCB board fixed on the table, and obtains the actual coordinates corresponding to each target point on each PCB board based on the shooting results.

4. The method according to any one of claims 1-3, characterized in that, Based on the actual and expected coordinates of each target point on each PCB board, determine the position compensation information corresponding to each PCB board, including: Based on the actual and expected coordinates of each target point on each PCB board, calculate the translational offset and angular offset information corresponding to each PCB board. Based on the translation offset information and angle offset information corresponding to each PCB board, the translation compensation information and angle compensation information corresponding to each PCB board are determined as position compensation information.

5. The method according to claim 1, characterized in that, Before simultaneously printing each PCB board using the actual inkjet image, the following is also included: Based on the actual coordinates corresponding to each target point on each PCB board, determine the first outer edge size information of the actual inkjet image composed of each target image; based on the expected coordinates corresponding to each target point on each PCB board, determine the second outer edge size information of the expected inkjet image composed of each target image. Based on the first outer edge dimension information and the second outer edge dimension information, determine the expansion and contraction compensation value corresponding to the actual printed image, and use the expansion and contraction compensation value to adjust the expansion and contraction of the actual printed image.

6. A printing device for small-sized PCB boards, characterized in that, include: The layout information acquisition module is used to acquire the expected layout information of multiple small-sized PCBs to be printed simultaneously on the table, including: a layout position determination unit, used to determine the layout position of each PCB on the table according to the number of PCBs to be printed simultaneously and the preset layout strategy. The reference PCB board expected coordinate acquisition unit is used to acquire the reference PCB board among all PCB boards and acquire the expected coordinates corresponding to the four corner points of the reference PCB board. Other PCB board expected coordinate acquisition units are used to determine the expected coordinates corresponding to at least two target points of each PCB board based on the expected coordinates corresponding to the four corner points of the reference PCB board and the layout strategy; wherein, the expected layout information includes the expected coordinates corresponding to at least two target points of each PCB board. The target point actual coordinate acquisition module is used to acquire the actual coordinates of each target point on each PCB after fixing each PCB on the table. The position compensation information determination module is used to determine the position compensation information corresponding to each PCB board based on the actual coordinates and expected coordinates of each target point on each PCB board. The inkjet printing module is used to copy the target image corresponding to each PCB board to the same actual inkjet image according to the position compensation information corresponding to each PCB board, and use the actual inkjet image to print each PCB board simultaneously. The inkjet printing module includes: a standard image position acquisition unit, used to acquire the standard image position of the target image corresponding to each PCB board in the inkjet image, wherein the standard image position is associated with the expected coordinates of the PCB board; The image position determination unit is used to determine the adjusted image position of each target image in the inkjet image based on the standard image position of the target image corresponding to each PCB board in the inkjet image and the position compensation information corresponding to each PCB board. The target image copying unit is used to copy the target image corresponding to each PCB board to the same actual inkjet image according to the adjusted image position of each target image in the inkjet image.

7. An electronic device, characterized in that, The electronic device includes: At least one processor; and A memory communicatively connected to the at least one processor; wherein, The memory stores a computer program that can be executed by the at least one processor, the computer program being executed by the at least one processor to enable the at least one processor to perform a printing method for a small-sized PCB board according to any one of claims 1-5.

8. A computer-readable storage medium, characterized in that, The computer-readable storage medium stores computer instructions that, when executed by a processor, implement the inkjet printing method for a small-sized PCB board according to any one of claims 1-5.

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