Printing calibration method and equipment for mobile phone shell printing equipment

Abstract

The invention provides a printing calibration method and equipment for mobile phone shell printing equipment, the mobile phone shell printing equipment comprises a mobile phone shell jig and a printing nozzle, and the printing calibration method is applied to the mobile phone shell printing equipment. Comprising the steps that a printing nozzle is controlled to print a first test pattern on the printing surface of a standard mobile phone shell fixed to a mobile phone shell jig, a first printing offset is obtained according to an actual printing effect picture, and a first compensation value is obtained according to the first printing offset; controlling the printing nozzle to print a second test pattern on the printing surface of the shipping mobile phone shell fixed on the mobile phone shell jig according to the first compensation value, obtaining a second printing offset according to the actual printing effect picture, and obtaining a second compensation value according to the second printing offset; and according to the first compensation value and the second compensation value, a printing nozzle is controlled to print a picture on the printing surface of the shipment mobile phone shell. Therefore, according to the method, the picture printing precision and printing effect of the mobile phone shell can be effectively improved.

Description

Technical Field

[0001] This application relates to the field of mobile phone case printing, and particularly to a printing calibration method and device for a mobile phone case printing device. Background Art

[0002] With the development of technology, smart phones are widely used. When people use smart phones, most of them will set a mobile phone case on the outside of the smart phone to protect the smart phone. Under this premise, compared with buying ready-made mobile phone cases, people are more inclined to customize their own exclusive mobile phone cases and print personalized pictures on the exclusive mobile phone cases.

[0003] However, in the prior art, during the printing and customization process of exclusive mobile phone cases, due to reasons such as the position deviation of the mobile phone case relative to the mobile phone case printing device and the manufacturing error of the mobile phone case itself, the picture printing is offset or incomplete, affecting the picture printing accuracy and printing effect of the mobile phone case. Summary of the Invention

[0004] Based on this, the purpose of this application is to provide a printing calibration method and device for a mobile phone case printing device, which can effectively improve the picture printing accuracy and printing effect of the mobile phone case.

[0005] The purpose of this application can be achieved through the following technical solutions:

[0006] A printing calibration method for a mobile phone case printing device, which is applied to a mobile phone case printing device. The mobile phone case printing device includes a mobile phone case fixture and a printing nozzle. The printing calibration method includes the following steps: controlling the printing nozzle to print a preset first test pattern on the printing surface of a standard mobile phone case fixed on the mobile phone case fixture, and obtaining a first printing offset according to the actual printing effect diagram of the first test pattern on the standard mobile phone case, and obtaining a first compensation value according to the first printing offset; controlling the printing nozzle to print a preset second test pattern on the printing surface of a shipping mobile phone case fixed on the mobile phone case fixture according to the first compensation value, and obtaining a second printing offset according to the actual printing effect diagram of the second test pattern on the shipping mobile phone case, and obtaining a second compensation value according to the second printing offset; controlling the printing nozzle to perform picture printing on the printing surface of the shipping mobile phone case according to the first compensation value and the second compensation value.

[0007] A printing calibration device for a mobile phone case, including: a processor, a memory, and a computer program stored in the memory and executable on the processor. When the processor executes the computer program, the steps of the above-mentioned printing calibration method for the mobile phone case printing device are implemented.

[0008] Compared with the prior art, in the method described in the present application, first, the printing nozzle is controlled to print a preset first test pattern on the printing surface of a standard mobile phone case fixed on the mobile phone case fixture, and according to the actual printing effect diagram of the first test pattern on the standard mobile phone case, a first printing offset is obtained, and then a first compensation value is obtained according to the first printing offset; then, the printing nozzle is controlled to print a preset second test pattern on the printing surface of the shipping mobile phone case fixed on the mobile phone case fixture according to the first compensation value, and according to the actual printing effect diagram of the second test pattern on the shipping mobile phone case, a second printing offset is obtained, and then a second compensation value is obtained according to the second printing offset; finally, according to the first compensation value and the second compensation value, the printing nozzle is controlled to perform picture printing on the printing surface of the shipping mobile phone case. Thus, the method described in the present application not only avoids printing offset or printing incompleteness of the picture to be printed due to improper installation of the mobile phone case fixture on the mobile phone case printing device or the existence of tolerances in the device, but also takes into account the slight errors that easily exist between different styles of mobile phone cases, ensures that the picture to be printed can be correctly printed on the printing surface of the shipping mobile phone case, increases the printing efficiency of the mobile phone case printing device, and thus effectively improves the picture printing accuracy and picture printing effect of the mobile phone case as a whole.

[0009] For better understanding and implementation, the present application will be described in detail below with reference to the accompanying drawings. Description of the Drawings

[0010] Figure 1 It is a flowchart of the steps of a printing calibration method for a mobile phone case printing device provided by the present application;

[0011] Figure 2 It is a flowchart of the steps of uploading and downloading the first compensation value in a printing calibration method for a mobile phone case printing device provided by the present application;

[0012] Figure 3 It is a flowchart of the steps of obtaining and calling different second compensation values in a printing calibration method for a mobile phone case printing device provided by the present application;

[0013] Figure 4 It is a schematic diagram of the first printing test pattern in a printing calibration method for a mobile phone case printing device provided by the present application;

[0014] Figure 5 It is a schematic diagram of the second printing test pattern in a printing calibration method for a mobile phone case printing device provided by the present application;

[0015] Figure 6 It is a schematic diagram of a printing calibration device for a mobile phone case printing device provided by the present application. Detailed Embodiment

[0016] This application provides a printing calibration method and device for a mobile phone case printing device. To make the objectives, technical solutions, and effects of this application clearer and more explicit, the following further elaborates on this application with reference to the accompanying drawings and by way of examples. It should be understood that the specific examples described herein are only used to explain this application and are not used to limit this application.

[0017] Those skilled in the art of this technology can understand that unless specifically stated otherwise, the singular forms "a", "an", "the", and "said" used herein may also include the plural forms. It should be further understood that the term "including" used in the specification of this application means that there are the described features, integers, steps, operations, elements, and / or components, but does not exclude the existence or addition of one or more other features, integers, steps, operations, elements, components, and / or their groups. It should be understood that when we say an element is "connected" or "coupled" to another element, it can be directly connected or coupled to other elements, or there may also be intermediate elements. In addition, the "connection" or "coupling" used herein may include wireless connection or wireless coupling. The phrase "and / or" used herein includes all or any unit and all combinations of one or more related listed items.

[0018] Those skilled in the art of this technology can understand that unless otherwise defined, all terms (including technical terms and scientific terms) used herein have the same meaning as the general understanding of those of ordinary skill in the field to which this application belongs. It should also be understood that terms such as those defined in a general dictionary should be understood to have a meaning consistent with the meaning in the context of the prior art, and will not be interpreted with an idealized or overly formal meaning unless specifically defined as here.

[0019] The following further illustrates the invention content by describing the embodiments with reference to the accompanying drawings.

[0020] Embodiment 1

[0021] Please refer to Figure 1 , Figure 1 which is a flowchart of the steps of a printing calibration method for a mobile phone case printing device provided by this application. The printing calibration method for the mobile phone case printing device is a printing calibration method for pictures on the mobile phone case. At the same time, the printing calibration method for the mobile phone case printing device is applied to the mobile phone case printing device, wherein the mobile phone case printing device at least includes a mobile phone case fixture for fixing the mobile phone case and a printing nozzle for printing pictures on the printing surface of the mobile phone case. The printing calibration method for the mobile phone case printing device includes the following steps:

[0022] S10. Control the printing nozzle to print a preset first test pattern on the printing surface of the standard mobile phone case fixed on the mobile phone case jig, obtain a first printing offset according to the actual printing effect diagram of the first test pattern on the standard mobile phone case, and obtain the first compensation value according to the first printing offset;

[0023] S20. Control the printing nozzle to print a preset second test pattern on the printing surface of the mobile phone case for shipment fixed on the mobile phone case jig according to the first compensation value, obtain a second printing offset according to the actual printing effect diagram of the second test pattern on the mobile phone case for shipment, and obtain the second compensation value according to the second printing offset;

[0024] S30. Control the printing nozzle to perform picture printing on the printing surface of the mobile phone case for shipment according to the first compensation value and the second compensation value.

[0025] By controlling the printing nozzle to print a preset first test pattern on the printing surface of the standard mobile phone case fixed on the mobile phone case jig, obtaining and obtaining a first printing offset according to the actual printing effect diagram of the first test pattern on the standard mobile phone case, and then obtaining the first compensation value according to the first printing offset; then, by controlling the printing nozzle to print a preset second test pattern on the printing surface of the mobile phone case for shipment fixed on the mobile phone case jig according to the first compensation value, obtaining and obtaining a second printing offset according to the actual printing effect diagram of the second test pattern on the mobile phone case for shipment, and then obtaining the second compensation value according to the second printing offset; finally, according to the first compensation value and the second compensation value, controlling the printing nozzle to perform picture printing on the printing surface of the mobile phone case for shipment. Thus, in the method of the present application, by controlling the printing nozzle to print a test pattern on the standard mobile phone case to obtain the first printing offset and the first compensation value, it is possible to enable technicians to effectively compensate and correct the printing process of picture printing for fixing the mobile phone case with the mobile phone case jig when the mobile phone case jig is installed improperly and cannot be moved, overcoming the problem of poor printing effect or incomplete picture of the printed picture caused by the incorrect installation position of the mobile phone case jig; and, after compensating for the offset of the mobile phone case jig, by controlling the printing nozzle to print a test pattern on the mobile phone case for actual shipment to obtain the second printing offset and the second compensation value, the slight difference between the standard mobile phone case and the mobile phone case for shipment is made up, thereby improving the printing effect of the picture on the mobile phone case for shipment and ensuring the yield rate of the printed mobile phone case for shipment.

[0026] Among them, the mobile phone case printing device at least includes a mobile phone case fixture for fixing the mobile phone case and a printing nozzle for performing picture printing on the printing surface of the mobile phone case; in one embodiment, the printing nozzle is installed at a slide rail above the mobile phone case fixture and can perform spraying printing on the printing area by reciprocating movement in the X-axis and Y-axis directions, and the area of the printing area is larger than the printing surface of the mobile phone case fixed on the mobile phone case fixture. Thus, technicians can adjust the printing movement parameters of the printing nozzle and control the printing nozzle to print or not print on a specific area of the printing surface of the mobile phone case according to the first compensation value and the second compensation value, so as to correctly print the picture to be printed on the printing surface of the mobile phone case fixed on the mobile phone case fixture.

[0027] The mobile phone cases mentioned in this application (including the standard mobile phone case and the mobile phone case for shipment) can be understood as the external protective cases of the device provided for the mobile phone case printing device to perform picture printing. The embodiments in this application mainly take the external protective case of the mobile phone as an example for illustration, but based on the inventive concept of this application, it should be foreseeable that it can not only refer to the external protective case of the mobile phone, but also the external protective cases of various mobile terminals other than the mobile phone, such as tablet computer protective cases, mobile learning machine protective cases, and smart watch protective cases, etc.; and when the mobile phone case is the external protective case of various mobile terminals other than the mobile phone, those skilled in the art can, based on the inventive concept of this application, make adaptive modifications to the printing calibration method of the mobile phone case printing device described in this application and then apply it to the printing calibration of the external protective cases of various mobile terminals other than the mobile phone, for example: a printing calibration method for a tablet computer protective case, etc.

[0028] In addition, the specific structure of the printing nozzle and the working principle of performing picture printing (for example, the orientation of the printing nozzle, the toner spraying amount of the printing nozzle, and how to control the extraction of toner from the ink cartridge and spraying it out through the printing nozzle, etc.) are not described in detail in this application. Those skilled in the art can obtain them based on the inventive concept of this application in combination with the common general knowledge in the art to avoid unnecessary limitations; and the same applies to the mobile phone case fixture, which should be understood that it can achieve the function of fixing the mobile phone case, and is not limited to various fixing methods or fixing structures of various shapes.

[0029] For step S10, control the printing nozzle to print a preset first test pattern on the printing surface of the standard mobile phone case fixed on the mobile phone case fixture, and obtain a first printing offset according to the actual printing effect picture of the first test pattern on the standard mobile phone case, and obtain the first compensation value according to the first printing offset.

[0030] Wherein, the standard mobile phone case refers to a mobile phone case used to calibrate and compensate for the installation offset of the mobile phone case jig; the first test pattern refers to a test pattern used to test and quantify the installation offset degree of the mobile phone case jig. In one embodiment, the first test pattern may be a JPG format picture or a vector picture saved on a computer device, or a digital image obtained by scanning a hand-drawn sketch, or a graphical interface element dynamically generated through a specific programming interface.

[0031] In one embodiment, the actual printed effect diagram of the first test pattern on the standard mobile phone case can be obtained by controlling the print head to print the first test pattern on the standard mobile phone case and then taking a video or scanning the printed standard mobile phone case.

[0032] In one embodiment, the first compensation value used to compensate for the offset of the mobile phone case jig when printing a picture using the standard mobile phone case at least includes a rotation angle, a front-back movement distance, and a left-right movement distance.

[0033] The inventor found in long-term work that due to tolerances in mechanical equipment and mechanical structures or improper operations by equipment installers, during the installation of the mobile phone case jig of the mobile phone case printing device, position offsets often occur, resulting in a change in the preset positional relationship between it and the print head. Therefore, when printing a pattern / picture on a mobile phone case fixed to the offset mobile phone case jig, the pattern / picture printed on the printing surface of the mobile phone case will be offset, thus affecting the picture printing effect and the yield rate of the mobile phone case. Therefore, in one embodiment, the step S10 includes:

[0034] S101. Control the print head to print a preset first test pattern on the printing surface of the standard mobile phone case fixed to the mobile phone case jig.

[0035] Wherein, the preset first test pattern includes a first print test diagram; please refer to Figure 4 , in one embodiment, the first print test diagram includes several horizontal line segments with a preset spacing and several vertical line segments with a preset spacing; the first print offset amount includes an angular offset amount; the first compensation value includes a first movement compensation value.

[0036] In an alternative embodiment, the first printed test pattern includes a first pattern, which includes a number of first horizontal lines and first vertical lines with a preset spacing arranged on the periphery of the first printed test pattern, and the first horizontal lines and the first vertical lines are perpendicular to each other; the first printed test pattern further includes at least two sub-regions, and the first printed test pattern further includes a second pattern, which includes a number of second horizontal lines and second vertical lines with a preset spacing arranged in the same or different sub-regions, and the second horizontal lines and the second vertical lines are perpendicular to each other.

[0037] In an embodiment, scales may be arranged on the first vertical line, the first horizontal line, the second vertical line, and the second horizontal line to improve the accuracy of the obtained first movement compensation value.

[0038] S102. If the horizontal line segment and / or vertical line segment of the actual printed effect diagram printed on the standard mobile phone case is not parallel to the edge of the standard mobile phone case, obtain the angle offset according to the included angle between the horizontal line segment and the edge of the standard mobile phone case and / or the included angle between the vertical line segment and the edge of the standard mobile phone case.

[0039] In an embodiment, those skilled in the art can, based on the inventive concept of the present application and in combination with the common general knowledge in the art, obtain the included angle between the horizontal line segment and the edge of the standard mobile phone case and the included angle between the vertical line segment and the edge of the standard mobile phone case. For example, mechanical automation measurement or manual operation measurement can be used to obtain the angles, etc.

[0040] S103. Obtain the first movement compensation value according to the angle offset.

[0041] In an embodiment, those skilled in the art can, according to the angle offset, control the position adjustment of the picture to be printed stored in the mobile phone case printing device, so as to obtain the first movement compensation value and adjust the travel path of the printing nozzle in the subsequent printing process.

[0042] In an embodiment, those skilled in the art can understand that the angle offset can be equivalently regarded as the first movement compensation value. After those skilled in the art implement steps S102 and S103, they can obtain the angle offset generated by the tolerances existing in the mechanical equipment and mechanical structure or the improper installation of the mobile phone case fixture, so that the picture to be printed stored in the mobile phone case printing device can be synchronously rotated by the same angle offset, and the printing nozzle can print the picture to be printed appropriately on the printing surface of the mobile phone case fixed on the mobile phone case fixture according to the first movement compensation value corresponding to the angle offset.

[0043] Meanwhile, after the step S101, the present application also provides some printing calibration steps for mobile phone cases of the printing calibration method that can also be applied to the mobile phone case printing device, which are used to obtain the horizontal offset caused by tolerances in mechanical equipment and mechanical structures or improper installation of the mobile phone case fixture to obtain the first compensation value; please refer to Figure 5 (Applied to iPhone14promax), in this embodiment, the preset first test pattern further includes a second printing test pattern, the second printing test pattern includes a black border adapted to the size and shape of the standard mobile phone case, the first printing offset further includes a horizontal offset, and the first compensation value further includes a second movement compensation value. The steps include:

[0044] S1021. If the actual printing effect diagram printed on the standard mobile phone case does not include the complete black border, obtain the horizontal offset according to the distance from the black border to the edge of the standard mobile phone case;

[0045] In one embodiment, those skilled in the art can, based on the inventive concept of the present application and in combination with the common general knowledge in the art, determine whether the actual printing effect diagram printed on the standard mobile phone case includes the complete black border, such as by performing image detection or manual verification after shooting with a camera.

[0046] In one embodiment, those skilled in the art can, based on the inventive concept of the present application and in combination with the common general knowledge in the art, obtain the distance from the black border to the edge of the standard mobile phone case, such as by mechanical automatic measurement or manual operation measurement using a distance measuring instrument, etc.

[0047] S1031. Obtain the second movement compensation value according to the horizontal offset.

[0048] In one embodiment, those skilled in the art can control the position adjustment of the picture to be printed stored in the mobile phone case printing device according to the horizontal offset, so as to obtain the second movement compensation value and adjust the traveling path of the printing nozzle in the subsequent printing process.

[0049] In one embodiment, those skilled in the art can understand that the horizontal offset can be equivalently regarded as the second movement compensation value. After those skilled in the art perform steps S1021 and S1031, they can obtain the horizontal offset caused by tolerances in mechanical equipment and mechanical structures or improper installation of the mobile phone case jig, so that the picture to be printed stored in the mobile phone case printing device can be translated synchronously by the same horizontal offset, enabling the print head to appropriately print the picture to be printed on the printing surface of the mobile phone case fixed to the mobile phone case jig according to the second movement compensation value corresponding to the horizontal offset.

[0050] In addition, in the technology of mobile phone case pattern printing, it is usually defaulted that the positioning accuracy between the mobile phone case and the mobile phone case printing device is ensured by a standardized mobile phone case jig, and little attention is paid to the superposition effect of the manufacturing tolerance of the mobile phone case itself and the installation error of the mobile phone case jig. However, through long-term efforts in the field of mobile phone case printing and a large number of experiments, the inventor found that: even with a high-precision printing device, due to the edge deformation tolerance generated during the injection molding of the mobile phone case (generally regarded as an acceptable range in the industry), the assembly gap between the positioning pin of the mobile phone case jig and the housing positioning hole, and the mechanical wear error generated by the long-term use of the transmission mechanism of the printing device, it will ultimately lead to a cumulative offset of the printed pattern exceeding the expectation, especially in the edge area of the curved surface housing, there will be pattern cutting defects. This discovery breaks through the inherent perception of those skilled in the art that attributes printing deviation solely to equipment accuracy, and for the first time reveals that the three-dimensional coupling effect of the mobile phone case body error, jig installation error, and equipment tolerance is the root cause of printing defects. Based on this, the printing calibration method of the mobile phone case printing device described in this application further provides the following step S20 to further improve the picture printing accuracy and printing effect of the mobile phone case and solve the long-neglected printing accuracy bottleneck problem.

[0051] For step S20, control the print head to print a preset second test pattern on the printing surface of the mobile phone case for shipment fixed to the mobile phone case jig according to the first compensation value, and obtain a second printing offset according to the actual printing effect picture of the second test pattern on the mobile phone case for shipment, and obtain the second compensation value according to the second printing offset.

[0052] Among them, the mobile phone case for shipment refers to the mobile phone case shipped to users after picture printing; the second test pattern refers to a test pattern used to test and quantify the difference between the mobile phone case for shipment and the standard mobile phone case. In one embodiment, the second test pattern can be a JPG format picture or a vector picture saved on a computer device, or a digital image obtained by scanning a hand-drawn sketch, or a graphical interface element dynamically generated through a specific programming interface.

[0053] In one embodiment, the actual printing effect of the second test pattern on the standard mobile phone case can be obtained by controlling the print head to print the second test pattern on the mobile phone case for shipment, and then recording or scanning the printed mobile phone case for shipment.

[0054] In one embodiment, when the mobile phone case for shipment is used for printing pictures, compensation is performed based on the position difference between the standard mobile phone case and the mobile phone case for shipment; the second compensation value for compensating for the difference caused by different materials or structures of the mobile phone case for shipment and / or the error of the picture printing position caused by different frame thicknesses of mobile phone cases of different models at least includes a rotation angle, a front-to-back movement distance, and a left-to-right movement distance. Thus, the second compensation value is superimposed on the first compensation value to improve the printing effect of the picture.

[0055] Since the standard mobile phone case refers to the mobile phone case used to calibrate and compensate for the installation offset of the mobile phone case jig, and is not the mobile phone case actually used for printing pictures and shipping to users, in the process of printing the mobile phone case for shipping, there will be a slight difference between the mobile phone case for shipping and the standard mobile phone case (for example, the thickness of the two is different), which will cause the printing effect of the picture printed on the mobile phone case for shipping to be poor, and there will be situations such as the picture printed on the mobile phone case for shipping being offset or missing. Therefore, in one embodiment, the step S20 includes:

[0056] S201, controlling the print head to print a preset second test pattern on the printing surface of the mobile phone case for shipment fixed on the mobile phone case jig according to the first compensation value;

[0057] S202. If the actual printing effect image of the second test pattern on the mobile phone case for shipping is offset relative to the center of the printing surface of the mobile phone case for shipping, a second printing offset is obtained according to the actual printing effect image of the second test pattern on the mobile phone case for shipping, and the second compensation value is obtained according to the second printing offset.

[0058] In one embodiment, it can be understood by those skilled in the art that the second printing offset can be equivalently regarded as the second compensation value. After obtaining the first compensation value, those skilled in the art can obtain the second printing offset caused by the slight difference between the shipping mobile phone case and the standard mobile phone case by implementing steps S201-S202, so that the image to be printed stored in the mobile phone case printing device can be synchronously adjusted to the same second printing offset, so that the print head can appropriately print the image to be printed on the printing surface of the mobile phone case fixed on the mobile phone case fixture according to the second compensation value corresponding to the second printing offset.

[0059] In one embodiment, it should be understood that those skilled in the art, based on the inventive concept of the present application and on the premise of making adaptive modifications, may also choose to use the first test pattern as the second test pattern to perform steps S201 - S202, so as to continue to implement the method described in the present application.

[0060] In one embodiment, the step of obtaining the second printing offset according to the actual printing effect diagram of the second test pattern on the mobile phone case for shipment in step S202 includes:

[0061] S202a. Obtain the second printing offset according to the distance from the pattern center of the second test pattern printed on the printing surface of the mobile phone case for shipment to the central axis of the printing surface of the mobile phone case for shipment.

[0062] In one embodiment, those skilled in the art can, based on the inventive concept of the present application and in combination with the common general knowledge in the art, obtain the distance from the pattern center of the second test pattern printed on the printing surface of the mobile phone case for shipment to the central axis of the printing surface of the mobile phone case for shipment. For example, it can be obtained by mechanical automated measurement or manual operation measurement using a distance measuring instrument, etc.

[0063] For step S30: Control the printing nozzle to perform picture printing on the printing surface of the mobile phone case for shipment according to the first compensation value and the second compensation value.

[0064] In one embodiment, step S30 includes:

[0065] S301. Obtain the picture to be printed, adjust the position of the picture to be printed according to the first compensation value and the second compensation value, and then control the printing nozzle to print the adjusted picture to be printed on the printing surface of the mobile phone case for shipment.

[0066] Among them, the picture to be printed can be a picture scanned, taken by the user or selected locally on the personal device and uploaded to the mobile phone case printing device, or it can be an artistic work or personalized pattern in the nature of a picture created by the user using the design software built into the personal device and uploaded to the mobile phone case printing device, or it can also be a 3D design file made and uploaded by the user to the mobile phone case printing device, etc.

[0067] In one embodiment, those skilled in the art can control the position adjustment of the picture to be printed stored in the mobile phone case printing device according to the first printing offset and the second printing offset, so as to obtain the first compensation value and the second compensation value, and adjust the travel path of the printing nozzle in the subsequent printing process.

[0068] In one embodiment, after those skilled in the art perform step S301, they can obtain the first printing offset and the second printing offset, so that the picture to be printed stored in the mobile phone case printing device can be synchronously rotated and / or moved by the same first printing offset and second printing offset, enabling the printing nozzle to appropriately print the picture to be printed on the printing surface of the mobile phone case fixed to the mobile phone case jig according to the first compensation value and the second compensation value corresponding to the first printing offset and the second printing offset respectively.

[0069] In addition, the present application also provides some printing calibration steps for mobile phone cases for the printing calibration method of the mobile phone case printing device, which are used for uploading and downloading the first compensation value. Please refer to Figure 2 The steps include:

[0070] S401. In response to the compensation value modification upload instruction, modify the first compensation value stored locally in the mobile phone case printing device and upload the modified first compensation value to the server;

[0071] S402. When the mobile phone case printing device is powered on, control the mobile phone case printing device to download the first compensation value stored on the server to the local, and compare it with the first compensation value stored locally in the mobile phone case printing device. If they are different, overwrite the first compensation value stored locally in the mobile phone case printing device with the first compensation value downloaded from the server.

[0072] In this embodiment, the first compensation value stored in the mobile phone case printing device may be lost or tampered with due to reasons such as power failure. Therefore, the user can manually input or modify the first compensation value and upload it to the server for backup; at the same time, when the mobile phone case printing device is powered on, control the mobile phone case printing device to download the first compensation value stored on the server to the local, and compare it with the first compensation value stored locally in the mobile phone case printing device to implement verification of the local value, thereby improving the picture printing accuracy and printing effect when using the mobile phone case printing device to print mobile phone cases.

[0073] In addition, the present application also provides some printing calibration steps for mobile phone cases for the printing calibration method of the mobile phone case printing device, which are used for performing printing calibration when printing pictures on different shipped mobile phone cases. In one embodiment, the mobile phone case printing device stores at least two types of shipped mobile phone cases. Therefore, please refer to Figure 3 The steps include:

[0074] S501. Control the mobile phone case printing device to separately obtain the second compensation values corresponding to various shipped mobile phone cases from the server and store them locally.

[0075] S502. According to the first compensation value and the second compensation values corresponding to various shipped mobile phone cases, control the print head to perform picture printing on the printing surfaces of various shipped mobile phone cases.

[0076] In this embodiment, the mobile phone case printing device can store multiple different shipped mobile phone cases. The user can control the mobile phone case printing device to separately obtain the second compensation values corresponding to various shipped mobile phone cases from the server and store them locally. When the user subsequently selects the corresponding shipped mobile phone case for picture printing, the corresponding second compensation value will be called to control the print head to perform picture printing on the printing surface of the corresponding shipped mobile phone case.

[0077] In one embodiment, the user cannot modify the second compensation value on the mobile phone case printing device, thereby improving the data security and confidentiality of the second compensation value and ensuring the picture printing accuracy and printing effect of the corresponding shipped mobile phone cases.

[0078] Embodiment 2

[0079] This application also provides a computer device. As Figure 6 shown, the computer device 21 may include: a processor 210, a memory 211, and a computer program 212 stored in the memory 211 and executable on the processor 210, for example: the print calibration program of the mobile phone case printing device; when the processor 210 executes the computer program 212, the steps in the above embodiments are implemented.

[0080] Among them, the processor 210 may include one or more processing cores. The processor 210 is connected to various parts within the computer device 21 through various interfaces and lines. By running or executing instructions, programs, code sets, or instruction sets stored in the memory 211, and by calling the data in the memory 211, it performs various functions of the computer device 21 and processes data. Optionally, the processor 210 may be implemented in at least one hardware form of digital signal processing (DSP), field-programmable gate array (FPGA), or programmable logic array (PLA). The processor 210 may integrate a combination of one or several of a central processing unit (CPU), a graphics processing unit (GPU), and a modem, etc. Among them, the CPU mainly processes the operating system, user interface, application programs, etc.; the GPU is responsible for rendering and drawing the content to be displayed on the touch display screen; the modem is used to process wireless communications. It can be understood that the above-mentioned modem may not be integrated into the processor 210 and may be implemented separately by a single chip.

[0081] Among them, the memory 211 may include random access memory (RAM) and may also include read-only memory. Optionally, the memory 211 includes a non-transitory computer-readable storage medium. The memory 211 can be used to store instructions, programs, code, code sets, or instruction sets. The memory 211 may include a program storage area and a data storage area. Among them, the program storage area may store instructions for implementing the operating system, instructions for at least one function (such as touch instructions, etc.), instructions for implementing the above-mentioned various method embodiments, etc.; the data storage area may store the data involved in the above-mentioned various method embodiments. Optionally, the memory 211 may also be at least one storage device located far from the aforementioned processor 210.

[0082] The embodiment of the present application also provides a computer storage medium, which can store multiple instructions. These instructions are suitable for being loaded and executed by the processor to perform the method steps of the above embodiment. The specific execution process can refer to the specific description of the above embodiment and will not be elaborated here.

[0083] Those skilled in the art can clearly understand that, for the convenience and brevity of description, only the above-mentioned division of each functional unit and module is used as an example. In actual applications, the above-mentioned functions can be assigned to different functional units and modules according to needs, that is, the internal structure of the device can be divided into different functional units or modules to complete all or part of the functions described above. Each functional unit and module in the embodiment can be integrated into a processing unit, or each unit can exist physically alone, or two or more units can be integrated into one unit. The above-mentioned integrated unit can be implemented in the form of hardware or in the form of a software functional unit. In addition, the specific names of each functional unit and module are only for the convenience of mutual distinction and do not limit the protection scope of this application. The specific working process of the units and modules in the above system can refer to the corresponding process in the foregoing method embodiment and will not be elaborated here.

[0084] In the above embodiments, the descriptions of the various embodiments have their own emphases. For the parts not detailed or recorded in a certain embodiment, reference can be made to the relevant descriptions of other embodiments.

[0085] Those of ordinary skill in the art can realize that the units and algorithm steps of each example described in combination with the embodiments disclosed herein can be implemented by electronic hardware, or by a combination of computer software and electronic hardware. Whether these functions are executed in a hardware or software manner depends on the specific application and design constraints of the technical solution. Professionals can use different methods to implement the described functions for each specific application, but such implementation should not be considered to exceed the scope of this application.

[0086] In the embodiments provided in this application, it should be understood that the disclosed device / terminal device and method can be implemented in other ways. For example, the device / terminal device embodiments described above are only illustrative. For example, the division of modules or units is only a logical function division. In actual implementation, there can 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 coupling or direct coupling or communication connection to each other can be through some interfaces. The indirect coupling or communication connection of the device or unit can be in an electrical, mechanical or other form.

[0087] The units described as separate components may or may not be physically separated, and 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.

[0088] In addition, in each embodiment of the present application, each functional unit may be integrated into one processing unit, may exist physically alone for each unit, or two or more units may be integrated into one unit. The above integrated unit may be implemented in the form of hardware or in the form of a software functional unit.

[0089] If the integrated module / unit is implemented in the form of a software functional unit and sold or used as an independent product, it may be stored in a computer-readable storage medium. Based on such an understanding, to implement all or part of the processes in the above-described embodiment methods of the present application, it may also be completed by instructing relevant hardware through a computer program. The computer program may be stored in a computer-readable storage medium. When the computer program is executed by a processor, the steps of the above-described various method embodiments may be implemented. Among them, the computer program includes computer program code, and the computer program code may be in the form of source code, object code, executable file, or some intermediate form, etc.

[0090] The above-described embodiments merely represent several implementation manners of the present application. The description is relatively specific and detailed, but it should not be construed as a limitation on the scope of the invention patent. It should be noted that for those of ordinary skill in the art, without departing from the concept of the present application, several modifications and improvements can still be made, and the present application also intends to include these modifications and improvements.

Claims

1. A printing calibration method for a mobile phone case printing device, applied to a mobile phone case printing device, characterized in that, The mobile phone case printing device includes a mobile phone case fixture and a printing nozzle. The printing calibration method includes the following steps: Control the printing nozzle to print a preset first test pattern on the printing surface of a standard mobile phone case fixed on the mobile phone case fixture, and obtain a first printing offset according to the actual printing effect diagram of the first test pattern on the standard mobile phone case, and obtain the first compensation value according to the first printing offset; Control the printing nozzle to print a preset second test pattern on the printing surface of the shipping mobile phone case fixed on the mobile phone case fixture according to the first compensation value, and obtain a second printing offset according to the actual printing effect diagram of the second test pattern on the shipping mobile phone case, and obtain the second compensation value according to the second printing offset; According to the first compensation value and the second compensation value, control the printing nozzle to perform picture printing on the printing surface of the shipping mobile phone case.

2. The printing calibration method of the mobile phone case printing device according to claim 1, the step of controlling the printing nozzle to perform picture printing on the printing surface of the shipping mobile phone case according to the first compensation value and the second compensation value includes: Obtain the picture to be printed, adjust the position of the picture to be printed according to the first compensation value and the second compensation value, and then control the printing nozzle to print the adjusted picture to be printed on the printing surface of the shipping mobile phone case.

3. The printing calibration method of the mobile phone case printing device according to claim 1, characterized in that, The preset first test pattern includes a first printing test diagram; the first printing test diagram includes a plurality of horizontal line segments with a preset spacing and a plurality of vertical line segments with a preset spacing; the first printing offset includes an angular offset; the first compensation value includes a first movement compensation value; The steps of obtaining a first printing offset according to the actual printing effect diagram of the first test pattern on the standard mobile phone case and obtaining the first compensation value according to the first printing offset include: If the horizontal line segment and / or the vertical line segment of the actual printing effect diagram printed on the standard mobile phone case is not parallel to the edge of the standard mobile phone case, obtain the angular offset according to the included angle between the horizontal line segment and the edge of the standard mobile phone case and / or the included angle between the vertical line segment and the edge of the standard mobile phone case; Obtain the first movement compensation value according to the angular offset.

4. The printing calibration method of the mobile phone case printing device according to claim 3, characterized in that The first printing test diagram includes a first pattern, the first pattern includes a plurality of first horizontal lines and first vertical lines with a preset spacing arranged on the periphery of the first printing test diagram, and the first horizontal lines and the first vertical lines are perpendicular to each other; the first printing test diagram further includes at least two sub-regions, the first printing test diagram further includes a second pattern, the second pattern includes a plurality of second horizontal lines and second vertical lines with a preset spacing arranged in the same or different sub-regions, and the second horizontal lines and the second vertical lines are perpendicular to each other.

5. The printing calibration method of the mobile phone case printing device according to claim 3, characterized in that, The preset first test pattern further includes a second printing test pattern; the second printing test pattern includes a black border adapted to the size and shape of the standard mobile phone case; the first printing offset further includes a horizontal offset; the first compensation value further includes a second movement compensation value; The step of obtaining a first printing offset according to the actual printing effect diagram of the first test pattern on the standard mobile phone case and obtaining the first compensation value according to the first printing offset further includes: If the actual printing effect diagram printed on the standard mobile phone case does not include the complete black border, obtain the horizontal offset according to the distance from the black border to the edge of the standard mobile phone case; Obtain the second movement compensation value according to the horizontal offset.

6. The printing calibration method of the mobile phone case printing device according to claim 5, the step of obtaining a second printing offset according to the actual printing effect diagram of the second test pattern on the shipped mobile phone case and obtaining the second compensation value according to the second printing offset includes: If the actual printing effect diagram of the second test pattern on the shipped mobile phone case is offset relative to the center of the printing surface of the shipped mobile phone case, obtain a second printing offset according to the actual printing effect diagram of the second test pattern on the shipped mobile phone case, and obtain the second compensation value according to the second printing offset.

7. The printing calibration method of the mobile phone case printing device according to claim 6, the step of obtaining a second printing offset according to the actual printing effect diagram of the second test pattern on the shipped mobile phone case includes: Obtain the second printing offset according to the distance from the pattern center of the second test pattern printed on the printing surface of the shipped mobile phone case to the central axis of the printing surface of the shipped mobile phone case.

8. The printing calibration method of the mobile phone case printing device according to any one of claims 1-7, the printing calibration method of the mobile phone case printing device further includes: In response to a compensation value modification upload instruction, modify the first compensation value stored locally in the mobile phone case printing device and upload the modified first compensation value to the server; When the mobile phone case printing device is powered on, control the mobile phone case printing device to download the first compensation value stored on the server to the local, and compare it with the first compensation value stored locally in the mobile phone case printing device. If they are different, overwrite the first compensation value stored locally in the mobile phone case printing device with the first compensation value downloaded from the server.

9. The printing calibration method of the mobile phone case printing device according to any one of claims 1-7, characterized in that The mobile phone case printing device stores at least two types of shipped mobile phone cases, and the printing calibration method of the mobile phone case printing device further includes: Control the mobile phone case printing device to respectively obtain the second compensation values corresponding to various shipped mobile phone cases from the server and store them locally; According to the first compensation value and the second compensation values corresponding to various shipped mobile phone cases, control the printing nozzle to perform picture printing on the printing surfaces of various shipped mobile phone cases.

10. A printing calibration device for a mobile phone case printing device, characterized in that, Including: A processor, a memory, and a computer program stored in the memory and executable on the processor, wherein when the processor executes the computer program, the steps of the method according to any one of claims 1 to 9 are implemented.

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