Ink drop point observation system

Abstract

The invention relates to the technical field of ink-jet printing, and particularly provides an ink drop point observation system, which comprises a shell; an image acquisition assembly; the first glass substrate is arranged on the shell in a sliding manner and is positioned above the image acquisition assembly; a first linear driving assembly; the controller is used for generating a target nozzle screening graph comprising a plurality of preset ink drops according to a preset nozzle screening requirement and a preset interval, and is also used for observing the target nozzle screening graph after the ink drop point observation system is placed below the to-be-observed nozzle; images of a plurality of ink droplets falling on the first glass substrate are sequentially acquired through cooperation of the to-be-observed nozzle, the first linear driving assembly and the image acquisition assembly based on a preset interval, then all the images are integrated into an actual drop point image, and the analysis module is further used for analyzing whether the to-be-observed nozzle is available or not according to the actual drop point image and the target nozzle screening graph; the ink drop point observation efficiency and the accuracy and reliability of the ink drop point observation result can be effectively improved.

Description

TECHNICAL FIELD

[0001] The present application relates to the field of inkjet printing technology, in particular, to an ink drop landing point observation system. BACKGROUND

[0002] As a new manufacturing technology, inkjet printing has a wide application prospect in the fields of electronic manufacturing and additive manufacturing. In the inkjet printing process, ink drop landing point observation as a key technical link is to print ink drops on a test substrate, and to analyze and judge the size, shape, satellite drops and straightness of the printed ink drops, so as to screen the nozzle, and the result has an important influence on the printing quality of the finished product.

[0003] The related technology integrates the ink drop landing point observation system in the inkjet printing equipment. In order to avoid the printing production position, the related technology needs to set the ink drop landing point observation system in the position far away from the printing production position in the inkjet printing equipment. Therefore, when the ink drop landing point observation is needed, the related technology needs to first move the glass substrate of the ink drop landing point observation system to the nozzle, then control the nozzle to spray ink drops on the glass substrate, then move the glass substrate to the image acquisition assembly of the ink drop landing point observation system, and finally use the image acquisition assembly to acquire the image of the ink drops on the glass substrate, and use the acquired image for analysis and judgment. Since the ink drops are sprayed on the glass substrate by the nozzle, the related technology needs to move the glass substrate back to the ink drop landing point observation system to observe the ink drops, and the shape of the ink drops may change during the movement of the glass substrate. Therefore, the related technology has the problems of low observation efficiency of the ink drop landing point observation and the decline of the accuracy and reliability of the ink drop landing point observation result due to the movement of the glass substrate back to the ink drop landing point observation system.

[0004] At present, there is no effective technical solution to the above problems. SUMMARY

[0005] The purpose of the present application is to provide an ink drop landing point observation system which can effectively improve the ink drop landing point observation efficiency and the accuracy and reliability of the ink drop landing point observation result.

[0006] The present application provides an ink drop landing point observation system, which is placed under the nozzle to be observed when ink drop landing point observation is needed. The ink drop landing point observation system comprises: a housing; an image acquisition assembly installed on the housing; a first glass substrate slidingly arranged on the housing and located between the image acquisition assembly and the nozzle to be observed, for carrying the ink drops sprayed by the nozzle to be observed; A first linear drive assembly is disposed on the housing and is used to drive the first glass substrate to move horizontally. The controller is used to generate a target nozzle screening map including multiple preset ink droplets according to preset nozzle screening requirements and preset spacing. It is also used to, after the ink droplet landing observation system is placed under the nozzle to be observed, sequentially spray multiple ink droplets onto the first glass substrate and sequentially acquire images of the latest ink droplet landing on the first glass substrate through the cooperation of the nozzle to be observed, the first linear drive component and the image acquisition component based on the preset spacing, and then integrate all the images into an actual landing image. It is also used to analyze whether the nozzle to be observed is usable based on the actual landing image and the target nozzle screening map.

[0007] This application provides an ink droplet landing point observation system that integrates an image acquisition component, a first glass substrate, and a first linear drive component into a housing. This enables real-time image acquisition of ink droplets landing on the first glass substrate without moving the first glass substrate. Because this real-time acquisition mechanism effectively avoids the risk of ink droplet morphology changes during movement and eliminates the back-and-forth movement time of the glass substrate between the inkjet position and the image acquisition position, this application can effectively improve the efficiency of ink droplet landing point observation as well as the accuracy and reliability of the ink droplet landing point observation results.

[0008] Optionally, after the ink droplet landing point observation system is placed below the nozzle to be observed, multiple ink droplets are sequentially sprayed onto the first glass substrate based on a preset interval through the cooperation of the nozzle to be observed, the first linear drive component, and the image acquisition component, and images of the latest ink droplet landing on the first glass substrate are sequentially acquired. Then, the process of integrating all images into an actual landing point image includes: A1. After the ink droplet landing point observation system is placed below the nozzle to be observed, the nozzle to be observed is controlled to spray ink droplets onto the first glass substrate, and then the image acquisition component is used to acquire an image containing the ink droplet landing on the first glass substrate. A2. The first linear drive component is controlled to drive the first glass substrate to move according to the preset spacing; A3. Control the nozzle to be observed to spray ink droplets onto the first glass substrate, and then use the image acquisition component to acquire an image containing the ink droplets falling on the first glass substrate; A4. Analyze whether the number of ink ejections from the nozzle under observation has reached the preset number. If yes, proceed to step A5; otherwise, return to step A2. A5. Integrate the ink droplets in all images to obtain images of the actual landing points of multiple ink droplets falling on the first glass substrate.

[0009] Optionally, the nozzle to be observed is equipped with a preset target, and the ink droplet landing point observation system also includes a moving component, which is installed inside the housing. The image acquisition component is installed inside the housing via the moving component. Step A1 includes: A11. After the ink droplet landing point observation system is placed below the nozzle to be observed, analyze whether the preset target is fully exposed in the field of view of the image acquisition component. If yes, then execute step A12. If no, control the moving component to drive the image acquisition component to move inside the housing until the preset target is fully exposed in the field of view of the image acquisition component, and then execute step A12. A12. Control the nozzle to be observed to spray ink droplets onto the first glass substrate, and then use the image acquisition component to acquire an image containing the ink droplets falling on the first glass substrate.

[0010] After the ink droplet landing observation system is placed below the nozzle to be observed, this technical solution first uses the image acquisition component to locate the preset target. If the preset target is not fully exposed in the field of view of the image acquisition component, the position of the image acquisition component is precisely adjusted by the moving component until the preset target is accurately captured. Therefore, this technical solution achieves precise positioning and calibration of the image acquisition component before ink droplet ejection by setting a preset target on the nozzle to be observed and introducing a moving component to adjust the position of the image acquisition component. This avoids the problem of incomplete or inaccurate image acquisition caused by initial position deviation and ensures that the ink droplets ejected from the nozzle to be observed can accurately land in the observation area of ​​the image acquisition component. This effectively improves the accuracy and consistency of ink droplet image acquisition, and thus effectively improves the reliability and accuracy of ink droplet landing observation results.

[0011] Optionally, the target nozzle screening map includes multiple preset ink droplet landing points, and each ink droplet landing on the first glass substrate corresponds to a preset ink droplet landing point. The process of analyzing whether the nozzle to be observed is usable based on the actual landing point image and the target nozzle screening map includes: B1. Based on the actual landing point image, obtain the ink droplet boundary information, ink droplet center point coordinate information and ink droplet actual fitted diameter information for each ink droplet falling on the first glass substrate. B2. Count the number of abnormal ink droplets. The number of abnormal ink droplets is the total number of ink droplets whose actual clarity of the corresponding ink droplet boundary information is less than the preset clarity, whose deviation between the ink droplet center point coordinate information and the preset center point coordinate information of the corresponding preset ink droplet landing point is greater than the preset coordinate deviation, whose deviation between the actual fitted diameter information of the ink droplet and the preset fitted diameter information of the corresponding preset ink droplet landing point is greater than the preset diameter deviation, or whose deviation between the spacing of adjacent ink droplets in the actual landing point image and the preset spacing is greater than the preset spacing deviation. B3. Analyze whether the number of abnormal ink droplets is greater than the preset number. If so, the nozzle to be observed is considered unusable; otherwise, the nozzle to be observed is considered usable.

[0012] Optionally, the ink droplet landing point observation system further includes a substrate cleaning component, a second linear drive component, and a clamping component. The clamping component is mounted on the housing and located below the first glass substrate. The substrate cleaning component is slidably mounted on the housing and located above the first glass substrate. The second linear drive component is mounted on the housing and connected to the substrate cleaning component. The controller is also used to control the first linear drive component to move the first glass substrate to the cleaning station after the actual landing point image is acquired, and then clean the first glass substrate through the cooperation of the substrate cleaning component, the clamping component, and the second linear drive component.

[0013] Since the technical solution can immediately remove ink droplets on the first glass substrate after the actual landing point image is acquired, through the cooperation of the first linear drive component, the second linear drive component, the substrate cleaning component and the clamping component, the technical solution can effectively avoid the situation where the ink droplets falling on the first glass substrate are not removed in time, and the ink droplet solvent evaporates, resulting in the ink droplets remaining on the first glass substrate after cleaning, and the first glass substrate cannot be used for ink droplet landing point observation.

[0014] Optionally, the substrate cleaning assembly includes a scraper, and the process of cleaning the first glass substrate through the cooperation of the substrate cleaning assembly, the clamping assembly, and the second linear drive assembly includes: C1. After the first glass substrate is moved to the cleaning station, the control clamping component presses the first glass substrate upward and fixes it on the housing and makes the scraper contact the top surface of the first glass substrate. C2. Control the second linear drive component to drive the scraper to move relative to the first glass substrate, so as to clean the first glass substrate by scraping off the ink droplets located on the top surface of the first glass substrate using the scraper.

[0015] Optionally, the ink droplet landing point observation system further includes a first adsorption component and a second glass substrate. When acquiring actual landing point images using the first glass substrate, the second glass substrate is located below the substrate cleaning component, the first adsorption component is mounted on the substrate cleaning component, and the second glass substrate is slidably placed on the housing. After acquiring the actual landing point images, the process of controlling the first linear drive component to move the first glass substrate to the cleaning station includes: D1. After the actual landing point image is acquired and the second glass substrate is in the cleaning state, control the pressing component to press the second glass substrate upward and fix it on the housing, control the first adsorption component to adsorb the second glass substrate, and then control the pressing component to reset. D2. Control the first linear drive component to move the first glass substrate to the cleaning station, and control the second linear drive component to move the second glass substrate to the ink droplet observation station through the substrate cleaning component. Then, control the first adsorption component to release the adsorption of the second glass substrate and control the second linear drive component to reset.

[0016] When the first glass substrate completes ink droplet image acquisition and needs cleaning, the system can move the cleaned second glass substrate from the cleaning station to the ink droplet landing observation station, and move the first glass substrate that has completed ink droplet landing observation from the ink droplet landing observation station to the cleaning station. After the glass substrate switching is completed, the technical solution can perform ink droplet landing observation again. That is, the technical solution does not need to wait for the first glass substrate to be cleaned before the next observation. Therefore, the technical solution can effectively avoid the system idle time caused by waiting for the glass substrate to be cleaned through this parallel processing mechanism, thereby effectively improving the efficiency of performing multiple ink droplet landing observations, and providing a more efficient solution for the rapid screening and quality control of nozzles.

[0017] Optionally, the substrate cleaning assembly further includes a cleaning agent release assembly for releasing cleaning agent when cleaning the first glass substrate or the second glass substrate.

[0018] Optionally, both the first and second glass substrates undergo surface treatment, and the specific surface treatment process includes: The first glass substrate and the second glass substrate are pretreated to remove impurities from the first glass substrate or the second glass substrate. A silane hydrolysis solution is uniformly coated on a first glass substrate and a second glass substrate, and the first glass substrate and the second glass substrate are heated to form a silane coupling agent on the first glass substrate and the second glass substrate. A fluorinated silane coupling agent is uniformly deposited on a first glass substrate and a second glass substrate, and the first glass substrate and the second glass substrate are heated to cause the silane coupling agent and the fluorinated silane coupling agent to undergo a dehydration reaction.

[0019] This technical solution can ensure that the hydrophilic contact angle between the ink droplet and the first and second glass substrates is within a suitable range by surface treatment of the first and second glass substrates. This avoids situations where the ink droplet spreads out on the first and second glass substrates due to an excessively small hydrophilic contact angle, resulting in overlap between the ink droplets, or where the ink droplet retracts on the first and second glass substrates due to an excessively large hydrophilic contact angle, leading to accidental rolling of the ink droplet on the first and second glass substrates and unexpected changes in the droplet's landing position.

[0020] Optionally, the ink droplet landing point observation system also includes a light source mounted on the housing, which is used to illuminate the side of the first glass substrate near the nozzle to be observed.

[0021] As can be seen from the above, the ink droplet landing point observation system provided in this application achieves real-time image acquisition of ink droplets landing on the first glass substrate without moving the first glass substrate by integrating the image acquisition component, the first glass substrate, and the first linear drive component into a housing. Since this real-time acquisition mechanism can effectively avoid the risk of ink droplet shape changes during movement and eliminate the reciprocating movement time of the glass substrate between the ink spraying position and the image acquisition position, this application can effectively improve the ink droplet landing point observation efficiency and the accuracy and reliability of the ink droplet landing point observation results. Attached Figure Description

[0022] Figure 1 This is a schematic diagram of the structure of an ink droplet landing point observation system provided in an embodiment of this application.

[0023] Figure 2 A schematic diagram of the structure of the ink droplet landing point observation system of the hidden part of the shell provided in the embodiment of this application.

[0024] Figure 3 This is a schematic diagram of the structure of the image acquisition component, the second adsorption component, and the first linear drive component provided in the embodiments of this application.

[0025] Figure 4 This is a schematic diagram of the control relationship of an ink droplet landing point observation system provided in an embodiment of this application.

[0026] Figure 5 This is a schematic diagram illustrating the surface treatment of a first glass substrate and a second glass substrate, provided as an embodiment of this application.

[0027] Figure 6 The chemical formula for the dehydration reaction of hydrolyzed KH550 with tridecafluorooctyltriethoxysilane provided in the embodiments of this application is given.

[0028] Reference numerals: 1. Housing; 2. Image acquisition component; 3. First glass substrate; 4. First linear drive component; 5. Controller; 6. Moving component; 7. Substrate cleaning component; 8. Second linear drive component; 9. Handle; 10. Second adsorption component; 11. Second glass substrate. Detailed Implementation

[0029] The technical solutions of the embodiments of this application will be clearly and completely described below with reference to the accompanying drawings. Obviously, the described embodiments are only a part of the embodiments of this application, and not all of the embodiments. The components of the embodiments of this application described and shown in the accompanying drawings can generally be arranged and designed in various different configurations. Therefore, the following detailed description of the embodiments of this application provided in the accompanying drawings is not intended to limit the scope of the claimed application, but merely represents selected embodiments of this application. All other embodiments obtained by those skilled in the art based on the embodiments of this application without inventive effort are within the scope of protection of this application.

[0030] It should be noted that similar reference numerals and letters in the following figures indicate similar items; therefore, once an item is defined in one figure, it does not need to be further defined and explained in subsequent figures. Furthermore, in the description of this application, terms such as "first," "second," etc., are used only to distinguish descriptions and should not be construed as indicating or implying relative importance.

[0031] like Figures 1-4 As shown, this application provides an ink droplet landing point observation system. When it is necessary to observe the ink droplet landing point, the ink droplet landing point observation system is placed below the nozzle to be observed. The ink droplet landing point observation system includes: Casing 1; Image acquisition component 2 is mounted on housing 1; The first glass substrate 3 is slidably disposed on the housing 1 and located between the image acquisition component 2 and the nozzle to be observed, and is used to carry the ink droplets ejected by the nozzle to be observed. The first linear drive assembly 4 is disposed on the housing 1 and is used to drive the first glass substrate 3 to move horizontally. The controller 5 is used to generate a target nozzle screening map including multiple preset ink droplets according to preset nozzle screening requirements and preset spacing. It is also used to, after the ink droplet landing point observation system is placed under the nozzle to be observed, spray multiple ink droplets onto the first glass substrate 3 in sequence based on the preset spacing through the cooperation of the nozzle to be observed, the first linear drive component 4 and the image acquisition component 2, and acquire images of the latest ink droplets landing on the first glass substrate 3 in sequence. Then, it integrates all images into an actual landing point image. It is also used to analyze whether the nozzle to be observed is usable based on the actual landing point image and the target nozzle screening map.

[0032] The ink droplet landing point observation system provided in this embodiment is used to observe and analyze the landing point of ink droplets ejected from a nozzle to be observed (the nozzle to be observed, not shown in the figure) on a glass substrate, in order to evaluate the performance of the nozzle to be observed. It should be understood that the ink droplet landing point observation system provided in this application can be used to observe the ink droplet landing point of one nozzle to be observed, and the ink droplet landing point observation system provided in this application can also be used to simultaneously observe the ink droplet landing point of multiple nozzles to be observed. The housing 1 of this embodiment is the main structure of the ink droplet landing point observation system. The housing 1 is used to install and protect the internal components. The housing 1 is preferably made of metal alloy (such as aluminum alloy, stainless steel) or high-strength engineering plastic to provide sufficient rigidity and stability. The housing 1 is preferably provided with a handle 9 and a moving wheel (not shown in the figure) to improve the convenience of moving the ink droplet landing point observation system. The image acquisition component 2 of this embodiment is preferably a high-resolution CCD camera. The image acquisition component 2 is used to acquire images of ink droplets ejected from the nozzle to be observed landing on the first glass substrate 3. In this embodiment, the first glass substrate 3 serves as the carrier medium for the ink droplets. Its surface characteristics significantly influence the spread and morphology of the ink droplets. The sliding arrangement of the first glass substrate 3 can be achieved by setting guide rails and sliders on the housing 1 to ensure its stability and positioning accuracy during movement. The first linear drive component 4 in this embodiment is preferably an existing linear motor module or linear lead screw module. This first linear drive component 4 is used to drive the first glass substrate 3 to move horizontally. Specifically, when the nozzle to be observed ejects an ink droplet and the image acquisition component 2 completes the image acquisition of the ink droplet landing on the first glass substrate 3, this embodiment controls the first linear drive component 4 to drive the first glass substrate 3 to move a preset distance, moving the area on the first glass substrate 3 without ink droplets to below the nozzle to be observed. Then, the nozzle to be observed ejects a new ink droplet. Therefore, this embodiment can utilize the first linear drive component 4 to sequentially acquire images of the latest ink droplets ejected by the nozzle to be observed without moving the nozzle to be observed. The preset nozzle selection requirements in this embodiment are a series of standards for evaluating nozzle performance, such as the size and shape of ink droplets. This embodiment obtains the preset nozzle selection requirements by first acquiring an image of ink droplets ejected from a new nozzle, and then extracting features such as the size and shape of the ink droplets based on the image. The preset spacing in this embodiment is the expected distance between adjacent ink droplets on the first glass substrate 3. It should be understood that, since this embodiment controls the first linear drive component 4 to drive the first glass substrate 3 to move a preset spacing when the nozzle to be observed ejects an ink droplet and the image acquisition component 2 completes the acquisition of the image of the ink droplet landing on the first glass substrate 3, this embodiment can avoid the situation where multiple ink droplets ejected from the nozzle to be observed overlap. The target nozzle selection map in this embodiment is an ideal ink droplet landing point distribution map generated according to the preset nozzle selection requirements and the preset spacing. This target nozzle selection map is used for comparison with the actual landing point image.The actual landing point image in this embodiment is an image obtained by integrating (stitching together) multiple images acquired by the image acquisition component 2. This actual landing point image can reflect the actual landing point of the ink droplet.

[0033] In this embodiment, the controller 5 is electrically connected to the nozzle to be observed, the image acquisition component 2, and the first linear drive component 4. The controller 5 can generate a target nozzle screening map including multiple preset ink droplets by first generating multiple preset ink droplets according to preset nozzle screening requirements, and then arranging these preset ink droplets sequentially based on preset spacing. After the ink droplet landing observation system is placed below the nozzle to be observed, the controller 5 begins to coordinate the ink droplet ejection and image acquisition process. Specifically, the controller 5 controls the nozzle to be observed to eject ink droplets onto the first glass substrate 3 located below it. Since the image acquisition component 2 is located below the first glass substrate 3, and the first glass substrate 3 is transparent, the image acquisition component 2 acquires an image of the ink droplet after it lands on the first glass substrate 3. This allows for the acquisition of an image of the latest ink droplet landing on the first glass substrate 3 without moving the first glass substrate 3. In other words, this embodiment is equivalent to acquiring an image of the ink droplet before its shape changes due to movement, so that the image can accurately reflect the actual shape of the latest ink droplet landing on the first glass substrate 3. After acquiring an image of an ink droplet, the controller 5 controls the first linear drive component 4 to move the first glass substrate 3 by a preset distance. After the movement is complete, the nozzle to be observed ejects an ink droplet again, and the image acquisition component 2 acquires an image of the ink droplet again. This process is repeated until a sufficient number of ink droplet images are acquired (equivalent to the actual number of ink ejections reaching a preset number of ink ejections). After all preset number of ink droplet images have been acquired, the controller 5 integrates these independent ink droplet images into a complete actual landing point image. This actual landing point image reflects the true distribution of ink droplets ejected by the nozzle to be observed on the first glass substrate 3. Finally, the controller 5 performs a comparative analysis based on the integrated actual landing point image and a pre-generated target nozzle screening map. Specifically, this embodiment can determine whether the nozzle to be observed meets the preset screening requirements by comparing the landing point position, size, shape, and other characteristics of the actual ink droplet with the preset ink droplet characteristics in the target nozzle screening map, thereby determining whether the nozzle is usable. It should be understood that since the ink droplet images acquired in this application are acquired in real time before the ink droplet morphology changes, this application can effectively improve the accuracy and reliability of the ink droplet landing point observation results.It should also be understood that, since this application essentially provides a portable ink droplet observation system by integrating the image acquisition component 2, the first glass substrate 3, and the first linear drive component 4 into the housing 1, when ink droplet observation is required, this application can manually or automatically place the ink droplet observation system below the nozzle to be observed. When ink droplet observation is completed or not required, this application can manually or automatically remove the ink droplet observation system from the inkjet printing equipment. That is, this application does not require integrating the ink droplet observation system into the inkjet printing equipment. Therefore, this application can reduce the size of the inkjet printing equipment or increase the usable space of the inkjet printing equipment without changing its size. Preferably, the controller 5 in this embodiment controls the image acquisition component 2 under the condition that the time difference between the current time node and the time node when the latest ink droplet is ejected from the nozzle to be observed reaches a preset duration. This preset duration is preferably the time required for the ink droplet to fall onto the first glass substrate 3 after being ejected from the nozzle to be observed.

[0034] The core innovation of this application lies in the fact that by integrating the image acquisition component 2, the first glass substrate 3, and the first linear drive component 4 into the housing 1, the image of the ink droplet landing on the first glass substrate 3 can be acquired instantly without moving the first glass substrate 3. Since this instant acquisition mechanism can effectively avoid the risk of the ink droplet changing shape during movement and save the time of reciprocating movement of the glass substrate between the ink spraying position and the image acquisition position, this application can effectively improve the efficiency of ink droplet landing point observation and the accuracy and reliability of ink droplet landing point observation results.

[0035] In some preferred embodiments, after the ink droplet landing point observation system is placed below the nozzle to be observed, multiple ink droplets are sequentially sprayed onto the first glass substrate 3 based on a preset interval through the cooperation of the nozzle to be observed, the first linear drive component 4, and the image acquisition component 2, and images of the latest ink droplets landing on the first glass substrate 3 are sequentially acquired. Then, the process of integrating all images into an actual landing point image includes: A1. After the ink droplet landing point observation system is placed below the nozzle to be observed, the nozzle to be observed is controlled to spray ink droplets onto the first glass substrate 3, and then the image acquisition component 2 is used to acquire an image containing the ink droplet landing on the first glass substrate 3. A2. The first linear drive component 4 is controlled to drive the first glass substrate 3 to move according to the preset spacing. A3. Control the nozzle to be observed to spray ink droplets onto the first glass substrate 3, and then use the image acquisition component 2 to acquire an image containing the ink droplets falling on the first glass substrate 3; A4. Analyze whether the number of ink ejections from the nozzle under observation has reached the preset number. If yes, proceed to step A5; otherwise, return to step A2. A5. Integrate the ink droplets in all images to obtain images of the actual landing points of multiple ink droplets falling on the first glass substrate 3.

[0036] In step A1, the nozzle under observation is controlled to eject a droplet of ink onto the first glass substrate 3. Subsequently, the image acquisition component 2 is used to capture an image of the ink droplet landing on the first glass substrate 3. This step ensures that the initial landing point morphology of each ink droplet can be accurately recorded. In step A2, after the image acquisition of a single ink droplet is completed, the controller 5 controls the first linear drive component 4 to drive the first glass substrate 3 to move horizontally according to a preset interval. This preset interval ensures that subsequently ejected ink droplets have uniform spacing on the first glass substrate 3, facilitating subsequent analysis and integration. In step A3, after the first glass substrate 3 has moved into position, the nozzle under observation is controlled to eject an ink droplet again, and the image acquisition component 2 acquires an image of the ink droplet again. Step A3 is similar to step A1, and step A3 is used to acquire the landing point image of the next ink droplet. In this embodiment, the controller 5 records the number of ink ejections from the nozzle to be observed. In step A4, the controller 5 compares the number of ink ejections from the nozzle to be observed with a preset number. If the number of ink ejections has not reached the preset number, the system returns to step A2 to continue moving the first glass substrate 3, ejecting the next ink droplet, and acquiring images. If the number of ink ejections reaches the preset number, it indicates that images of multiple ink droplets falling on the first glass substrate 3 have been acquired, and the system will enter the subsequent image processing stage. In step A5, all the acquired individual ink droplet images are integrated by the controller 5 to generate a complete image of the actual landing point. It should be understood that step A5 belongs to the existing image integration technology in the art, and its working principle and workflow will not be discussed in detail here. This embodiment achieves the sequential acquisition and integration of multiple ink droplet landing images through steps A1-A5. Specifically, after each ink droplet is ejected onto the first glass substrate 3, the image acquisition component 2 immediately acquires an image of it to ensure that the ink droplet is recorded before its shape changes. Subsequently, the first linear drive component 4 precisely moves the first glass substrate 3 according to a preset interval to provide a new landing area for the ejection and acquisition of the next ink droplet. This cycle continues until a preset number of ink ejections is reached. Finally, all individual ink droplet images are integrated by the controller 5 to form an actual landing image reflecting the overall ink droplet landing distribution. This strategy of sequential acquisition and gradual movement effectively avoids the ink droplet shape distortion problem that may occur in traditional solutions due to moving the glass substrate before image acquisition, thereby effectively improving the realism and accuracy of the acquired image.

[0037] In some preferred embodiments, the nozzle to be observed is provided with a preset target (not shown in the figure), and the ink droplet landing point observation system also includes a moving component 6, which is installed inside the housing 1. The image acquisition component 2 is installed inside the housing 1 via the moving component 6. Step A1 includes: A11. After the ink droplet landing point observation system is placed below the nozzle to be observed, analyze whether the preset target is completely exposed in the field of view of the image acquisition component 2. If yes, then execute step A12. If no, control the moving component 6 to drive the image acquisition component 2 to move inside the housing 1 until the preset target is completely exposed in the field of view of the image acquisition component 2, and then execute step A12. A12. Control the nozzle to be observed to spray ink droplets onto the first glass substrate 3, and then use the image acquisition component 2 to acquire an image containing the ink droplets falling on the first glass substrate 3.

[0038] In this embodiment, the preset target refers to a specific mark or pattern set on the nozzle to be observed. This embodiment is equivalent to using the preset target as a reference point for positioning and calibrating the image acquisition component 2. The preset target can be a crosshair, a circular mark, or a specific coded pattern. The moving component 6 in this embodiment can be a linear module, a stepper motor-driven slide, or any mechanism capable of precisely adjusting the position of the image acquisition component 2 within the housing 1. The moving component 6 is preferably an existing camera motion stage. The moving component 6 is used to drive the image acquisition component 2 to move within the housing 1 to ensure that the preset target can completely enter the field of view of the image acquisition component 2. Step A11 can utilize existing image processing algorithms to analyze whether the preset target is fully exposed in the field of view of the image acquisition component 2. Specifically, the analysis process of step A11 can be as follows: based on existing image processing algorithms, target recognition is performed on the image currently acquired by the image acquisition component 2 to identify whether the preset target exists in the field of view of the image acquisition component 2, and to determine whether it is complete and located in the expected position (e.g., the center of the field of view). If the analysis result shows that the preset target is not fully exposed or the position is inaccurate, the controller 5 will issue a command to the moving component 6 to drive the image acquisition component 2 to make corresponding displacement adjustments until the preset target is accurately captured. After the ink droplet landing observation system is placed below the nozzle to be observed, this embodiment first uses the image acquisition component 2 to locate the preset target. If the preset target is not fully exposed in the field of view of the image acquisition component 2, the position of the image acquisition component 2 is precisely adjusted by the moving component 6 until the preset target is accurately captured. Therefore, this embodiment achieves precise positioning and calibration of the image acquisition component 2 before ink droplet ejection by setting a preset target on the nozzle to be observed and introducing the moving component 6 to adjust the position of the image acquisition component 2. This avoids the problem of incomplete or inaccurate image acquisition caused by initial position deviation and ensures that the ink droplets ejected from the nozzle to be observed can accurately land in the observation area of ​​the image acquisition component 2. This effectively improves the accuracy and consistency of ink droplet image acquisition, and thus effectively improves the reliability and accuracy of ink droplet landing observation results.

[0039] In some preferred embodiments, the target nozzle screening map includes multiple preset ink droplet landing points, and each ink droplet landing on the first glass substrate corresponds to a preset ink droplet landing point. The process of analyzing whether the nozzle to be observed is usable based on the actual landing point image and the target nozzle screening map includes: B1. Based on the actual landing point image, obtain the ink droplet boundary information, ink droplet center point coordinate information and ink droplet actual fitted diameter information corresponding to each ink droplet falling on the first glass substrate 3. B2. Count the number of abnormal ink droplets. The number of abnormal ink droplets is the total number of ink droplets whose actual clarity of the corresponding ink droplet boundary information is less than the preset clarity, whose deviation between the ink droplet center point coordinate information and the preset center point coordinate information of the corresponding preset ink droplet landing point is greater than the preset coordinate deviation, whose deviation between the actual fitted diameter information of the ink droplet and the preset fitted diameter information of the corresponding preset ink droplet landing point is greater than the preset diameter deviation, or whose deviation between the spacing of adjacent ink droplets in the actual landing point image and the preset spacing is greater than the preset spacing deviation. B3. Analyze whether the number of abnormal ink droplets is greater than the preset number. If so, the nozzle to be observed is considered unusable; otherwise, the nozzle to be observed is considered usable.

[0040] After obtaining the actual landing point image, step B1 can use existing image processing technology to identify and analyze each ink droplet in the image. Specifically, the ink droplet boundary information refers to the contour or edge data of the ink droplet in the image. The ink droplet boundary information can reflect the shape and integrity of the ink droplet. The ink droplet center point coordinate information refers to the geometric center position of each ink droplet in the image coordinate system. This ink droplet center point coordinate information is used to evaluate the landing point accuracy of the ink droplet. The ink droplet actual fitted diameter information refers to the diameter or equivalent diameter obtained by fitting the ink droplet contour (e.g., fitting it to a circle or ellipse). The ink droplet actual fitted diameter information is used to evaluate the size of the ink droplet and the amount of ink ejected. In step B2, the acquired ink droplet information is evaluated from multiple dimensions. A preset sharpness threshold is used to judge the quality of the ink droplet image. If the actual sharpness of the ink droplet boundary information is lower than the preset sharpness, it indicates insufficient ink droplet ejection speed. A preset coordinate deviation is the maximum allowable offset of the ink droplet center point coordinates, used to determine if the ink droplet landing point deviates from the target position. A preset diameter deviation is the maximum allowable fluctuation range of the actual fitted diameter of the ink droplet, used to determine if the ink droplet size meets the requirements. A preset spacing deviation is the maximum allowable deviation in the spacing between adjacent ink droplets, used to determine if the spacing between ink droplets ejected by the nozzle is uniform. When any indicator of an ink droplet exceeds the preset threshold, the ink droplet is recorded as an abnormal ink droplet. In this embodiment, the number of abnormal ink droplets is the total number of abnormal ink droplets. This embodiment is equivalent to quantifying the degree of nozzle performance defects by counting the number of abnormal ink droplets. In step B3, the counted number of abnormal ink droplets is compared with a preset number. The preset number is a preset threshold used to determine whether the overall performance of the nozzle meets acceptable standards. If the number of abnormal ink droplets exceeds a preset number, it indicates that the nozzle under observation has many inkjet defects and is judged as unusable; conversely, if the number of abnormal ink droplets does not exceed the preset number, the performance of the nozzle under observation is considered to be within an acceptable range and is judged as usable. This embodiment effectively solves the problems of unclear analysis standards and strong subjectivity in traditional methods by introducing a detailed and quantitative nozzle usability analysis process. Specifically, in step B1, key information such as the boundary information of ink droplets, the coordinate information of the ink droplet center point, and the actual fitted diameter information of the ink droplets are accurately extracted, laying a data foundation for subsequent quantitative evaluation. It is precisely because of these detailed ink droplet characteristic data that step B2 can conduct a detailed inspection of the ink droplet ejection quality from multiple dimensions (including the clarity of ink droplets, landing accuracy, size consistency, and spacing between adjacent ink droplets). By comparing these actual measured values ​​with preset performance standards and counting the number of abnormal ink droplets exceeding the standards, this application can objectively identify and quantify various defects in the nozzle.Finally, in step B3, by comparing the cumulative number of abnormal ink droplets with a preset number, a clear, data-driven judgment criterion is provided, thereby avoiding errors caused by subjective judgment and ensuring the accuracy and consistency of nozzle availability assessment.

[0041] In some preferred embodiments, the ink droplet landing point observation system further includes a substrate cleaning assembly 7, a second linear drive assembly 8, and a clamping assembly (not shown in the figure). The clamping assembly is mounted on the housing 1 and located below the first glass substrate 3. The substrate cleaning assembly 7 is slidably mounted on the housing 1 and located above the first glass substrate 3. The second linear drive assembly 8 is mounted on the housing 1 and connected to the substrate cleaning assembly 7. The controller 5 is also used to control the first linear drive assembly 4 to move the first glass substrate 3 to the cleaning station after the actual landing point image is acquired. Then, the first glass substrate 3 is cleaned through the cooperation of the substrate cleaning assembly 7, the clamping assembly, and the second linear drive assembly 8. In this embodiment, the substrate cleaning assembly 7 is slidably mounted on the housing 1 and located above the first glass substrate 3. In this embodiment, the second linear drive assembly 8 is mounted on the housing 1 and connected to the substrate cleaning assembly 7. The second linear drive assembly 8 can be an existing linear motor module or a linear lead screw module. The second linear drive assembly 8 is used to provide precise linear movement capability for the substrate cleaning assembly 7, so that the substrate cleaning assembly 7 can move relative to the first glass substrate 3 and enable the substrate cleaning assembly 7 to clean different areas of the first glass substrate 3. The clamping assembly in this embodiment can be a composite structure consisting of a clamping block and a driving mechanism. This clamping assembly is used to press and fix the first glass substrate 3 onto the housing 1 by driving the first glass substrate 3 upwards during the cleaning process, ensuring the stability of the first glass substrate 3 at the cleaning station and enabling it to be cleaned smoothly. Since this embodiment can immediately remove ink droplets from the first glass substrate 3 through the cooperation of the first linear driving assembly 4, the second linear driving assembly 8, the substrate cleaning assembly 7, and the clamping assembly after acquiring the actual droplet image, this embodiment can effectively avoid the situation where ink droplets falling on the first glass substrate 3 are not removed in time, causing the ink droplet solvent to evaporate and resulting in ink droplets remaining on the first glass substrate 3 after cleaning, rendering the first glass substrate 3 unusable for ink droplet observation.

[0042] In some preferred embodiments, the substrate cleaning assembly 7 includes a scraper, and the process of cleaning the first glass substrate 3 through the cooperation of the substrate cleaning assembly 7, the clamping assembly, and the second linear drive assembly 8 includes: C1. After the first glass substrate 3 is moved to the cleaning station, the control clamping component presses the first glass substrate 3 upward and fixes it on the housing 1 and makes the scraper contact the top surface of the first glass substrate 3. C2. Control the second linear drive component 8 to drive the scraper to move relative to the first glass substrate 3, so as to clean the first glass substrate 3 by scraping off the ink droplets located on the top surface of the first glass substrate 3 using the scraper.

[0043] The scraper in this embodiment is a sheet-like or strip-like component with a certain degree of hardness and toughness. Specifically, the scraper includes a support portion and a contact portion. The support portion is preferably made of stainless steel to improve the scraper's corrosion resistance and extend its service life. The contact portion is preferably made of flexible materials such as soft rubber, silicone, or non-woven fabric to avoid scratching the first glass substrate 3 during the cleaning process. Preferably, when the clamping assembly presses and fixes the first glass substrate 3 onto the housing 1, the contact portion is interference-fitted with the first glass substrate 3 so that the scraper can generate sufficient pressure to remove ink droplets from the first glass substrate 3. After the first glass substrate 3 is moved to the preset cleaning position by the first linear drive assembly 4, step C1 controls the clamping assembly to press and fix the first glass substrate 3 upward onto the housing 1 and to make the scraper contact the top surface of the first glass substrate 3, so as to prevent the first glass substrate 3 from shifting due to force during the cleaning process and to enable the scraper to effectively act on the ink droplets. In step C2, the controller 5 controls the second linear drive assembly 8 to move the scraper relative to the first glass substrate 3. This movement, reciprocating or unidirectional along the length or width of the first glass substrate 3, allows the scraper to physically contact the ink droplets on the top surface of the first glass substrate 3, scraping the droplets off the substrate surface. This mechanical scraping method effectively removes ink droplets adhering to the first glass substrate 3, thus achieving effective cleaning. This embodiment, through the introduction of the scraper and its synergistic effect with the clamping assembly and the second linear drive assembly 8, ensures that ink droplets are effectively scraped from the surface of the first glass substrate 3. This effectively reduces the possibility of ink droplet residue, thus significantly improving the cleanliness of the cleaned surface of the first glass substrate 3. This provides a clear, interference-free surface for subsequent ink droplet impact point observation, thereby effectively improving the accuracy and reliability of the subsequent observation results.

[0044] In some preferred embodiments, the ink droplet landing point observation system further includes a first adsorption component (not shown in the figure) and a second glass substrate 11. When acquiring actual landing point images using the first glass substrate 3, the second glass substrate 11 is located below the substrate cleaning component 7. The first adsorption component is mounted on the substrate cleaning component 7, and the second glass substrate 11 is slidably placed on the housing 1. After acquiring the actual landing point images, the process of controlling the first linear drive component 4 to move the first glass substrate 3 to the cleaning station includes: D1. After the actual landing point image is acquired and the second glass substrate 11 is in the cleaning state, control the pressing component to press the second glass substrate 11 upward and fix it on the housing 1, control the first adsorption component to adsorb the second glass substrate 11, and then control the pressing component to reset. D2. Control the first linear drive component 4 to move the first glass substrate 3 to the cleaning station, and control the second linear drive component 8 to move the second glass substrate 11 to the ink droplet observation station through the substrate cleaning component 7. Then, control the first adsorption component to release the adsorption of the second glass substrate 11 and control the second linear drive component 8 to reset in sequence.

[0045] The first adsorption component in this embodiment is a device for adsorbing and fixing the second glass substrate 11. For example, a vacuum chuck, an electromagnetic chuck, or other mechanical structures with adsorption function can be used. Its purpose is to ensure that the second glass substrate 11 can be stably gripped and moved during the glass substrate switching process. It should be understood that when the first adsorption component adsorbs the second glass substrate 11, the bottom surface height of the second glass substrate 11 is greater than the top surface height of the first glass substrate 3. Therefore, this embodiment can use the first linear drive component 4 to move the first glass substrate 3, which has completed ink droplet observation, from the ink droplet... The droplet observation station is transferred to the cleaning station, and the second glass substrate 11, after cleaning, is transferred from the cleaning station to the droplet observation station. The droplet observation station is located directly above the image acquisition component 2, i.e., the position where droplet image acquisition can be performed. It should also be understood that after the second glass substrate 11 completes droplet observation and the first glass substrate 3 completes cleaning, this embodiment can use the same means to transfer the second glass substrate 11, which has completed droplet observation, from the droplet observation station to the cleaning station, and the first glass substrate 3, which has completed cleaning, from the cleaning station to the droplet observation station. In this embodiment, the second glass substrate 11 preferably has the same structure and function as the first glass substrate 3, i.e., both the first glass substrate 3 and the second glass substrate 11 are used to carry the droplets ejected from the nozzle to be observed and can perform image acquisition and cleaning. Its sliding placement on the housing 1 means that its position can be precisely adjusted by the linear drive component. After acquiring the actual droplet landing image, step D1 checks whether the second glass substrate 11 has been cleaned (equivalent to determining whether the second glass substrate 11 is usable). If so, the clamping assembly presses the second glass substrate 11 upwards and fixes it to the housing 1, so that the first adsorption assembly can adsorb the second glass substrate 11, thereby firmly fixing the second glass substrate 11 to the substrate cleaning assembly 7. After adsorption is completed, the clamping assembly resets, releasing the clamping of the second glass substrate 11. In step D2, the first linear drive assembly 4 moves the first glass substrate 3, which has completed the ink droplet landing observation, to the cleaning station to prepare for cleaning. At the same time, the second linear drive assembly 8 moves the cleaned second glass substrate 11 to the ink droplet landing observation station through the substrate cleaning assembly 7 (which carries the adsorbed second glass substrate 11). After moving the second glass substrate 11 to the ink droplet observation station, the first adsorption component is first controlled to release its adsorption on the second glass substrate 11, and then the second linear drive component 8 is controlled to reset, so that the second glass substrate 11 can be used for ink droplet observation and cleaning of the first glass substrate 3. In this way, the two glass substrates can be switched synchronously or quasi-synchronously, with one being cleaned and the other immediately put into observation, thereby greatly improving the operating efficiency of the system.The solution of this application introduces a second glass substrate 11 and a first adsorption component, and optimizes the glass substrate switching process, enabling the ink droplet landing observation system to achieve continuous or quasi-continuous observation operations. Specifically, when the first glass substrate 3 completes ink droplet image acquisition and needs cleaning, the system can move from the cleaning station to the ink droplet landing observation station via the cleaned second glass substrate 11, and move the first glass substrate 3, which has completed ink droplet landing observation, from the ink droplet landing observation station to the cleaning station. After the glass substrate switching is completed, this embodiment can perform ink droplet landing observation again. That is, this embodiment does not need to wait for the first glass substrate 3 to be cleaned before performing the next observation. Therefore, this embodiment can effectively avoid system idle time caused by waiting for glass substrate cleaning through this parallel processing mechanism, thereby effectively improving the efficiency of performing multiple ink droplet landing observations, and providing a more efficient solution for the rapid screening and quality control of nozzles.

[0046] In some preferred embodiments, the substrate cleaning assembly 7 further includes a cleaning agent release assembly for releasing cleaning agent during cleaning of the first glass substrate 3 or the second glass substrate 11. The cleaning agent release assembly of this embodiment can be understood as a device for storing and spraying, dripping, or coating cleaning agent on demand. This embodiment assists the scraper in more thoroughly cleaning the glass substrate by releasing cleaning agent using the cleaning agent release assembly during cleaning of the first glass substrate 3 or the second glass substrate 11. The cleaning agent release assembly may include, but is not limited to, structures such as nozzles, droppers, brush heads, or rollers, and may be connected to a cleaning agent storage tank via a pipeline. The cleaning agent in this embodiment can be selected according to the composition of the ink droplets and the material of the glass substrate; for example, isopropanol, deionized water, or a special ink cleaning solution may be used. This embodiment introduces a cleaning agent release component, enabling the pre- or simultaneous release of cleaning agent during the cleaning of the first glass substrate 3 or the second glass substrate 11. This cleaning agent softens, dissolves, or emulsifies the ink droplets on the glass substrate, reducing the adhesion between the ink droplets and the glass substrate. Therefore, when the squeegee scrapes under the action of the cleaning agent, the ink droplets are more easily removed, significantly improving cleaning efficiency and thoroughness, and effectively avoiding the ink droplet residue problem that may exist when relying solely on squeegee cleaning. This ensures the cleanliness of the glass substrate surface, thereby effectively improving the accuracy and reliability of subsequent ink droplet landing point observation results, extending the service life of the glass substrate, and reducing the risk of misjudgment due to incomplete cleaning.

[0047] In some preferred embodiments, both the first glass substrate 3 and the second glass substrate 11 undergo surface treatment, and the specific process of surface treatment includes: The first glass substrate 3 and the second glass substrate 11 are pretreated to remove impurities from the first glass substrate 3 or the second glass substrate 11. The silane hydrolysis solution is uniformly coated on the first glass substrate 3 and the second glass substrate 11, and the first glass substrate 3 and the second glass substrate 11 are heated to form a silane coupling agent on the first glass substrate 3 and the second glass substrate 11. A fluorinated silane coupling agent is uniformly deposited on a first glass substrate 3 and a second glass substrate 11, and the first glass substrate 3 and the second glass substrate 11 are heated to cause the silane coupling agent and the fluorinated silane coupling agent to undergo a dehydration reaction.

[0048] This embodiment removes organic matter, inorganic matter, dust, and other impurities from the surfaces of the glass substrates (first glass substrate 3 and second glass substrate 11) by pre-treating the first glass substrate 3 and the second glass substrate 11, ensuring that the subsequent coating adheres uniformly and firmly. Pre-treatment can include physical cleaning (e.g., ultrasonic cleaning) and chemical cleaning (e.g., acid-base treatment or plasma treatment). This embodiment forms a silane coupling agent layer on the surface of the glass substrates by uniformly coating the first glass substrate 3 and the second glass substrate 11 with a silane hydrolysis solution and heating the glass substrates. Specifically, this embodiment can achieve uniform coating of the silane hydrolysis solution using methods such as blade coating, slot coating, ultrasonic atomization spraying, or spin coating. The silane hydrolysis solution in this embodiment can be a short-chain, non-fluorinated coupling agent such as hydrolyzed KH550 or METS. The silane coupling agent, as an intermediate layer, can react with the hydroxyl groups on the surface of the glass substrate to form covalent bonds, while its other end has active functional groups, providing connection points for the subsequent deposition of fluorinated silane coupling agents, thereby enhancing the adhesion of the coating. This embodiment achieves the formation of a low-surface-energy fluorinated coating on the glass substrate surface by uniformly depositing a fluorinated silane coupling agent onto a first glass substrate 3 and a second glass substrate 11, followed by heating the glass substrates. This is achieved through a dehydration reaction between the silane coupling agent and the fluorinated silane coupling agent. The uniform deposition of the fluorinated silane coupling agent can be achieved using the same method as coating a silane hydrolysis solution. The fluorinated silane coupling agent in this embodiment can be a fluorinated silane coupling agent with 13-17 fluorine atoms, such as tridecafluorooctyltriethoxysilane or heptadecafluorodecyltrimethoxysilane. The fluorocarbon chain structure of the fluorinated silane coupling agent used in this embodiment imparts hydrophobic and oleophobic properties to the coating, resulting in a hydrophilic contact angle of 90°-120° on the glass substrate surface. Specifically, taking the hydrolyzed silane hydrolysis solution agent as KH550 and the fluorinated silane coupling agent as tridecafluorooctyltriethoxysilane as an example, the flowchart and dehydration reaction chemical formula for the surface treatment of the glass substrate in this embodiment are as follows: Figure 5 and Figure 6As shown. This embodiment can ensure that the hydrophilic contact angle between the ink droplet and the first glass substrate 3 and the second glass substrate 11 is within a suitable range by surface treatment of the first glass substrate 3 and the second glass substrate 11. This avoids situations where the ink droplet spreads out on the first glass substrate 3 and the second glass substrate 11 due to an excessively small hydrophilic contact angle, resulting in overlap between ink droplets, or where the ink droplet retracts on the first glass substrate 3 and the second glass substrate 11 due to an excessively large hydrophilic contact angle, resulting in accidental rolling of the ink droplet on the first glass substrate 3 and the second glass substrate 11, and unexpected changes in the ink droplet's landing position.

[0049] In some preferred embodiments, the ink droplet landing point observation system further includes a light source mounted on the housing 1. The light source illuminates the side of the first glass substrate 3 closest to the nozzle to be observed. The light source in this embodiment is a device capable of emitting visible light or light of a specific wavelength. This light source can be an existing LED array, a ring light source, a backlight source, or a side light source. Mounted on the housing 1, the light source effectively illuminates the area above the first glass substrate 3, providing stable, uniform, and sufficient illumination for the image acquisition component 2. This ensures that the outline, shape, and landing point of the ink droplet are clearly captured when acquiring ink droplet images, and avoids image blurring or distortion caused by insufficient or uneven illumination. This embodiment adds a light source to the ink droplet landing point observation system. When the ink droplet landing point observation system is placed below the nozzle to be observed and ink droplet images are acquired, the light source can provide stable illumination to the ink droplets falling on the first glass substrate 3. Therefore, the image acquisition component 2 can obtain sufficient and uniform light when acquiring ink droplet images, thereby effectively improving the clarity and contrast of the acquired images. This allows the image acquisition component 2 to overcome the influence of insufficient or unstable ambient light, thereby ensuring that the actual shape and landing point information of the ink droplets can be accurately captured and recorded.

[0050] In some preferred embodiments, the ink droplet landing point observation system further includes a second adsorption component 10, which is slidably mounted on the housing 1. A first linear drive component 4 is connected to the second adsorption component 10. The second adsorption component 10 is used to adsorb the first glass substrate 3 or the second glass substrate 11 located at the ink droplet landing point observation station. The first linear drive component 4 drives the first glass substrate 3 or the second glass substrate 11 located at the ink droplet landing point observation station to move through the second adsorption component 10.

[0051] As can be seen from the above, the ink droplet landing point observation system provided in this application achieves real-time image acquisition of ink droplets landing on the first glass substrate 3 without moving the first glass substrate 3 by integrating the image acquisition component 2, the first glass substrate 3, and the first linear drive component 4 into the housing 1. Since this real-time acquisition mechanism can effectively avoid the risk of ink droplet shape changes during movement and save the reciprocating movement time of the glass substrate between the ink spraying position and the image acquisition position, this application can effectively improve the ink droplet landing point observation efficiency and the accuracy and reliability of the ink droplet landing point observation results.

[0052] In the embodiments provided in this application, it should be understood that relational terms such as first and second are used only to distinguish one entity or operation from another entity or operation, and do not necessarily require or imply any such actual relationship or order between these entities or operations.

[0053] The above description is merely an embodiment of this application and is not intended to limit the scope of protection of this application. Various modifications and variations can be made to this application by those skilled in the art. Any modifications, equivalent substitutions, improvements, etc., made within the spirit and principles of this application should be included within the scope of protection of this application.

Claims

1. A system for observing the landing point of ink droplets, characterized in that, When it is necessary to observe the ink droplet landing point, the ink droplet landing point observation system is placed below the nozzle to be observed. The ink droplet landing point observation system includes: case; Image acquisition components are mounted on the housing; A first glass substrate is slidably disposed on the housing and located between the image acquisition component and the nozzle to be observed, for bearing ink droplets ejected by the nozzle to be observed; A first linear drive assembly is disposed on the housing and is used to drive the first glass substrate to move horizontally. The controller is configured to generate a target nozzle screening map including multiple preset ink droplets according to preset nozzle screening requirements and preset spacing. It is also configured to, after the ink droplet landing point observation system is placed below the nozzle to be observed, sequentially spray multiple ink droplets onto the first glass substrate through the cooperation of the nozzle to be observed, the first linear drive component, and the image acquisition component based on the preset spacing, and sequentially acquire images of the latest ink droplets landing on the first glass substrate, and then integrate all the images into an actual landing point image. It is also configured to analyze whether the nozzle to be observed is usable based on the actual landing point image and the target nozzle screening map.

2. The ink droplet landing point observation system according to claim 1, characterized in that, The process of placing the ink droplet landing point observation system below the nozzle to be observed, and then sequentially spraying multiple ink droplets onto the first glass substrate and sequentially acquiring images of the latest ink droplet landing on the first glass substrate through the cooperation of the nozzle to be observed, the first linear drive component, and the image acquisition component based on the preset interval, and then integrating all the images into an actual landing point image includes: A1. After the ink droplet landing point observation system is placed below the nozzle to be observed, the nozzle to be observed is controlled to spray ink droplets onto the first glass substrate, and then the image acquisition component is used to acquire an image containing the ink droplet landing on the first glass substrate. A2. Control the first linear drive component to drive the first glass substrate to move according to the preset spacing; A3. Control the nozzle to be observed to spray ink droplets onto the first glass substrate, and then use the image acquisition component to acquire an image containing the ink droplets falling on the first glass substrate; A4. Analyze whether the number of ink ejections from the nozzle under observation has reached the preset number. If yes, proceed to step A5; otherwise, return to step A2. A5. Integrate the ink droplets in all the images to obtain an image of the actual landing points of multiple ink droplets falling on the first glass substrate.

3. The ink droplet landing point observation system according to claim 2, characterized in that, The nozzle to be observed is equipped with a preset target. The ink droplet landing point observation system also includes a moving component, which is installed inside the housing. The image acquisition component is installed inside the housing via the moving component. Step A1 includes: A11. After the ink droplet observation system is placed below the nozzle to be observed, analyze whether the preset target is fully exposed in the field of view of the image acquisition component. If yes, then execute step A12. If no, control the moving component to drive the image acquisition component to move within the housing until the preset target is fully exposed in the field of view of the image acquisition component, and then execute step A12. A12. Control the nozzle to be observed to spray ink droplets onto the first glass substrate, and then use the image acquisition component to acquire an image containing the ink droplets falling on the first glass substrate.

4. The ink droplet landing point observation system according to claim 1, characterized in that, The target nozzle screening map includes multiple preset ink droplet landing points, and each ink droplet falling on the first glass substrate corresponds to one of the preset ink droplet landing points. The process of analyzing whether the nozzle to be observed is usable based on the actual landing point image and the target nozzle screening map includes: B1. Based on the actual landing point image, obtain the ink droplet boundary information, ink droplet center point coordinate information and ink droplet actual fitted diameter information corresponding to each ink droplet falling on the first glass substrate; B2. Count the number of abnormal ink droplets. The number of abnormal ink droplets is the total number of ink droplets in which the actual clarity of the corresponding ink droplet boundary information is less than the preset clarity, the deviation between the ink droplet center point coordinate information and the preset center point coordinate information of the corresponding preset ink droplet landing point is greater than the preset coordinate deviation, the deviation between the actual fitted diameter information of the ink droplet and the preset fitted diameter information of the corresponding preset ink droplet landing point is greater than the preset diameter deviation, or the deviation between the spacing of adjacent ink droplets in the actual landing point image and the preset spacing is greater than the preset spacing deviation. B3. Analyze whether the number of abnormal ink droplets is greater than the preset number. If so, the nozzle to be observed is considered unusable; otherwise, the nozzle to be observed is considered usable.

5. The ink droplet landing point observation system according to claim 1, characterized in that, The ink droplet landing point observation system further includes a substrate cleaning assembly, a second linear drive assembly, and a clamping assembly. The clamping assembly is mounted on the housing and located below the first glass substrate. The substrate cleaning assembly is slidably mounted on the housing and located above the first glass substrate. The second linear drive assembly is mounted on the housing and connected to the substrate cleaning assembly. The controller is also used to control the first linear drive assembly to move the first glass substrate to the cleaning station after the actual landing point image is acquired, and then clean the first glass substrate through the cooperation of the substrate cleaning assembly, the clamping assembly, and the second linear drive assembly.

6. The ink droplet landing point observation system according to claim 5, characterized in that, The substrate cleaning assembly includes a scraper, and the process of cleaning the first glass substrate through the cooperation of the substrate cleaning assembly, the clamping assembly, and the second linear drive assembly includes: C1. After the first glass substrate is moved to the cleaning station, the pressing component is controlled to press the first glass substrate upward and fix it on the housing, and to make the scraper contact the top surface of the first glass substrate. C2. Control the second linear drive component to drive the scraper to move relative to the first glass substrate, so as to clean the first glass substrate by scraping off the ink droplets located on the top surface of the first glass substrate using the scraper.

7. The ink droplet landing point observation system according to claim 6, characterized in that, The ink droplet landing point observation system further includes a first adsorption component and a second glass substrate. When acquiring actual landing point images using the first glass substrate, the second glass substrate is located below the substrate cleaning component. The first adsorption component is mounted on the substrate cleaning component, and the second glass substrate is slidably placed on the housing. The process of controlling the first linear drive component to move the first glass substrate to the cleaning station after acquiring the actual landing point image includes: D1. After the actual landing point image is acquired and the second glass substrate is in the cleaning state, control the pressing component to press the second glass substrate upward and fix it on the housing, control the first adsorption component to adsorb the second glass substrate, and then control the pressing component to reset. D2. Control the first linear drive component to move the first glass substrate to the cleaning station, and control the second linear drive component to move the second glass substrate to the ink droplet observation station through the substrate cleaning component. Then, control the first adsorption component to release the adsorption of the second glass substrate and control the second linear drive component to reset in sequence.

8. The ink droplet landing point observation system according to claim 7, characterized in that, The substrate cleaning assembly further includes a cleaning agent release assembly, which is used to release cleaning agent when cleaning the first glass substrate or the second glass substrate.

9. The ink droplet landing point observation system according to claim 7, characterized in that, Both the first glass substrate and the second glass substrate have undergone surface treatment, and the specific process of the surface treatment includes: The first glass substrate and the second glass substrate are pretreated to remove impurities from the first glass substrate or the second glass substrate. A silane hydrolysis solution is uniformly coated on the first glass substrate and the second glass substrate, and the first glass substrate and the second glass substrate are heated to form a silane coupling agent on the first glass substrate and the second glass substrate. A fluorinated silane coupling agent is uniformly deposited on the first glass substrate and the second glass substrate, and the first glass substrate and the second glass substrate are heated to cause the silane coupling agent and the fluorinated silane coupling agent to undergo a dehydration reaction.

10. The ink droplet landing point observation system according to claim 1, characterized in that, The ink droplet landing point observation system also includes a light source, which is mounted on the housing and is used to illuminate the side of the first glass substrate near the nozzle to be observed.

Images