An ink drop landing point observation system

Abstract

The application relates to the field of inkjet printing technology, and particularly provides an ink drop landing point observation system, which comprises a shell, an image acquisition assembly, a first glass substrate, a first linear driving assembly, and a controller. The first glass substrate is slidably arranged on the shell and located above the image acquisition assembly. The controller is used for generating a target nozzle screening diagram comprising a plurality of preset ink drops according to preset nozzle screening requirements and a preset interval, and is used for sequentially acquiring images of the plurality of ink drops landing on the first glass substrate through the cooperation of the nozzle to be observed, the first linear driving assembly and the image acquisition assembly based on the preset interval after the ink drop landing point observation system is placed below the nozzle to be observed, then integrating all the images into an actual landing point image, and analyzing whether the nozzle to be observed is available according to the actual landing point image and the target nozzle screening diagram. The ink drop landing point observation system can effectively improve the ink drop landing point observation efficiency and the accuracy and reliability of ink drop landing point observation results.

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, so 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 collect the image of the ink drops on the glass substrate, and use the collected image for analysis and judgment. Since the nozzle sprays ink drops on the glass substrate, 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 back, so the related technology has the problems of low observation efficiency of the ink drop landing point observation due to the movement of the glass substrate back to the ink drop landing point observation system to observe the ink drops, and the accuracy and reliability of the ink drop landing point observation result are reduced due to the change of the shape of the ink drops during the movement of the glass substrate back.

[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, and the ink drop landing point observation system comprises:

[0007] a housing;

[0008] an image acquisition assembly installed on the housing;

[0009] The first glass substrate is slidably arranged on the shell and located between the image acquisition assembly and the nozzle to be observed, and is used to carry ink droplets sprayed by the nozzle to be observed;

[0010] The first linear driving assembly is arranged on the shell and is used to drive the first glass substrate to move horizontally;

[0011] The controller is used to generate a target nozzle screening diagram including a plurality of preset ink droplets according to preset nozzle screening requirements and a preset interval, and is used to spray the plurality of ink droplets onto the first glass substrate and sequentially acquire images of the ink droplets newly falling on the first glass substrate based on the preset interval through cooperation of the nozzle to be observed, the first linear driving assembly and the image acquisition assembly after the ink droplet landing point observation system is placed below the nozzle to be observed, and then integrate all the images into an actual landing point image, and is used to analyze whether the nozzle to be observed is available according to the actual landing point image and the target nozzle screening diagram.

[0012] The ink droplet landing point observation system provided by the application can realize image acquisition of the ink droplets falling on the first glass substrate in real time without moving the first glass substrate by integrating the image acquisition assembly, the first glass substrate and the first linear driving assembly in the shell, which can effectively avoid the risk of change in the shape of the ink droplets during movement and save the reciprocating movement time of the glass substrate between the ink spraying position and the image acquisition position, thereby effectively improving the ink droplet landing point observation efficiency and the accuracy and reliability of the ink droplet landing point observation result.

[0013] Optionally, after the ink droplet landing point observation system is placed below the nozzle to be observed, the plurality of ink droplets are sprayed onto the first glass substrate and the images of the ink droplets newly falling on the first glass substrate are sequentially acquired based on the preset interval through cooperation of the nozzle to be observed, the first linear driving assembly and the image acquisition assembly, and then all the images are integrated into an actual landing point image, and the process includes:

[0014] A1. After the ink droplet landing point observation system is placed below the nozzle to be observed, the nozzle to be observed sprays ink droplets onto the first glass substrate, and then the image acquisition assembly is used to acquire an image containing the ink droplets falling on the first glass substrate;

[0015] A2. The first linear driving assembly is controlled to drive the first glass substrate to move according to the preset interval;

[0016] A3. The nozzle to be observed sprays ink droplets onto the first glass substrate, and then the image acquisition assembly is used to acquire an image containing the ink droplets falling on the first glass substrate;

[0017] A4. It is analyzed whether the number of ink spraying times of the nozzle to be observed reaches a preset number, if yes, step A5 is executed, and if no, step A2 is returned.

[0018] A5, integrating the ink drops in all images to obtain an actual landing point image of the plurality of ink drops landing on the first glass substrate.

[0019] Optionally, the to-be-observed nozzle is provided with a preset target, and the ink drop landing point observation system further comprises a moving assembly installed in the housing, and the image acquisition assembly is installed in the housing through the moving assembly, and step A1 comprises:

[0020] A11, after the ink drop landing point observation system is placed below the to-be-observed nozzle, it is analyzed whether the preset target is completely exposed in the field of view of the image acquisition assembly, if yes, step A12 is executed, if not, the moving assembly is controlled to drive the image acquisition assembly to move in the housing until the preset target is completely exposed in the field of view of the image acquisition assembly, and then step A12 is executed;

[0021] A12, controlling the to-be-observed nozzle to spray ink drops to the first glass substrate, and then using the image acquisition assembly to collect the image containing the ink drops landing on the first glass substrate.

[0022] Since after the ink drop landing point observation system is placed below the to-be-observed nozzle, the technical scheme first uses the image acquisition assembly to position the preset target, and if the preset target is not completely exposed in the field of view of the image acquisition assembly, the position of the image acquisition assembly is accurately adjusted through the moving assembly until the preset target is accurately captured, so that the technical scheme realizes accurate positioning and calibration of the image acquisition assembly before spraying ink drops by setting the preset target on the to-be-observed nozzle and adjusting the position of the image acquisition assembly through the moving assembly, so as to avoid the problem of incomplete or inaccurate image acquisition caused by initial position deviation and make the ink drops sprayed by the to-be-observed nozzle subsequently accurately land in the observation area of the image acquisition assembly, thereby effectively improving the accuracy and consistency of ink drop image acquisition, and further effectively improving the reliability and accuracy of ink drop landing point observation results.

[0023] Optionally, the target nozzle screening map comprises a plurality of preset ink drop landing points, each ink drop landing on the first glass substrate corresponds to a preset ink drop landing point, and the process of analyzing whether the to-be-observed nozzle is available according to the actual landing point image and the target nozzle screening map comprises:

[0024] B1, according to the actual landing point image, obtaining ink drop boundary information, ink drop center point coordinate information and ink drop actual fitting diameter information corresponding to each ink drop landing on the first glass substrate;

[0025] B2, count the number of abnormal ink drops, the number of abnormal ink drops being the total number of ink drops that have an actual definition less than a preset definition, a deviation of ink drop center point coordinate information from preset center point coordinate information of a corresponding preset ink drop landing point greater than a preset coordinate deviation, a deviation of ink drop actual fitting diameter information from preset fitting diameter information of a corresponding preset ink drop landing point greater than a preset diameter deviation, or a deviation of a spacing between adjacent ink drops in the actual landing point image from a preset spacing greater than a preset spacing deviation;

[0026] B3, analyze whether the number of abnormal ink drops is greater than a preset number, if yes, the to-be-observed nozzle is considered unusable, and if no, the to-be-observed nozzle is considered usable.

[0027] Optionally, the ink drop landing observation system further comprises a substrate cleaning assembly, a second linear driving assembly, and a pressing assembly, the pressing assembly is installed on the housing and located below the first glass substrate, the substrate cleaning assembly is slidingly installed on the housing and located above the first glass substrate, the second linear driving assembly is installed on the housing and connected with the substrate cleaning assembly, and the controller is further configured to control the first linear driving assembly to move the first glass substrate to a cleaning station after the actual landing point image is collected, and then clean the first glass substrate by cooperation of the substrate cleaning assembly, the pressing assembly, and the second linear driving assembly.

[0028] Since the actual landing point image is collected, the technical solution can immediately remove the ink drops on the first glass substrate by cooperation of the first linear driving assembly, the second linear driving assembly, the substrate cleaning assembly, and the pressing assembly, so that the technical solution can effectively avoid the situation that the ink drops falling on the first glass substrate are not removed in time, the ink drop solvent evaporates, and the ink drops remain on the first glass substrate after cleaning, and the first glass substrate cannot be used for ink drop landing observation.

[0029] Optionally, the substrate cleaning assembly comprises a scraper, and the process of cleaning the first glass substrate by cooperation of the substrate cleaning assembly, the pressing assembly, and the second linear driving assembly comprises:

[0030] C1, after the first glass substrate is moved to the cleaning station, the pressing assembly is controlled to press and fix the first glass substrate upward on the housing and make the scraper contact the top surface of the first glass substrate;

[0031] C2, the second linear driving assembly is controlled to drive the scraper to move relative to the first glass substrate, so as to clean the first glass substrate by scraping the ink drops on the top surface of the first glass substrate with the scraper.

[0032] Optionally, the ink drop landing point observation system further comprises a first adsorption assembly and a second glass substrate, the second glass substrate is located below the substrate cleaning assembly when the actual landing point image is collected by using the first glass substrate, the first adsorption assembly is installed on the substrate cleaning assembly, and the second glass substrate is slidably placed on the housing; after the collection of the actual landing point image is completed and the second glass substrate is in the cleaning state, the process of moving the first glass substrate to the cleaning station by controlling the first linear driving assembly comprises:

[0033] D1, after the collection of the actual landing point image is completed and the second glass substrate is in the cleaning state, the second glass substrate is pressed and fixed on the housing by controlling the pressing assembly, the second glass substrate is adsorbed by controlling the first adsorption assembly, and then the pressing assembly is reset;

[0034] D2, the first glass substrate is moved to the cleaning station by controlling the first linear driving assembly, the second glass substrate is moved to the ink drop landing point observation station by controlling the second linear driving assembly through the substrate cleaning assembly, then the second glass substrate is released from the adsorption by controlling the first adsorption assembly, and the second linear driving assembly is reset.

[0035] When the first glass substrate completes the ink drop image collection and needs to be cleaned, the system can move the second glass substrate that has been cleaned from the cleaning station to the ink drop landing point observation station, and move the first glass substrate that has completed the ink drop landing point observation from the ink drop landing point observation station to the cleaning station. After the switching of the glass substrates is completed, the technical solution can perform ink drop landing point observation again, that is, the technical solution does not need to wait for the first glass substrate to be cleaned before performing the next observation. Therefore, the technical solution can effectively avoid the idle time of the system caused by waiting for the glass substrate to be cleaned, thereby effectively improving the efficiency of multiple ink drop landing point observations, and providing a more efficient solution for rapid screening and quality control of nozzles.

[0036] Optionally, the substrate cleaning assembly further comprises a cleaning agent releasing assembly for releasing a cleaning agent when cleaning the first glass substrate or the second glass substrate.

[0037] Optionally, the first glass substrate and the second glass substrate are both subjected to surface treatment, and the specific process of the surface treatment comprises:

[0038] The first glass substrate and the second glass substrate are pretreated to remove impurities on the first glass substrate or the second glass substrate;

[0039] The 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;

[0040] The fluorine-containing 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 make the silane coupling agent and the fluorine-containing silane coupling agent dehydrate.

[0041] The technical solution can make the hydrophilic contact angle of the ink drops and the first glass substrate and the second glass substrate in a suitable range through the surface treatment of the first glass substrate and the second glass substrate, so as to avoid the cases that the ink drops are in a spreading state on the first glass substrate and the second glass substrate and have a high spreading degree, the ink drops overlap each other, the ink drops are in a retraction state on the first glass substrate and the second glass substrate, the ink drops unexpectedly roll on the first glass substrate and the second glass substrate, and the ink drop landing position unexpectedly changes due to the too small hydrophilic contact angle of the ink drops and the first glass substrate and the second glass substrate or the too large hydrophilic contact angle of the ink drops and the first glass substrate and the second glass substrate.

[0042] Optionally, the ink drop landing point observation system further comprises a light source, the light source is installed on the shell, and the light source is used to irradiate one side of the first glass substrate close to the nozzle to be observed.

[0043] As can be seen from the above, the ink drop landing point observation system provided by the application can realize the image acquisition of the ink drops landed on the first glass substrate in real time without moving the first glass substrate through the way that the image acquisition assembly, the first glass substrate and the first linear driving assembly are integrated in the shell. Since the mechanism of such real-time acquisition can effectively avoid the risk of the change of the form of the ink drops during the movement and save the reciprocating movement time of the glass substrate between the ink jet position and the image acquisition position, the application can effectively improve the ink drop landing point observation efficiency and the accuracy and reliability of the ink drop landing point observation result. BRIEF DESCRIPTION OF DRAWINGS

[0044] Figure 1 The structure schematic diagram of the ink drop landing point observation system provided by the embodiment of the application is shown.

[0045] Figure 2 The structure schematic diagram of the ink drop landing point observation system provided by the embodiment of the application is shown.

[0046] Figure 3 The structure schematic diagram of the image acquisition assembly, the second adsorption assembly and the first linear driving assembly provided by the embodiment of the application is shown.

[0047] Figure 4 The control relationship schematic diagram of the ink drop landing point observation system provided by the embodiment of the application is shown.

[0048] Figure 5A schematic diagram of surface treatment of the first glass substrate and the second glass substrate is provided for the embodiments of the present application.

[0049] Figure 6 A chemical formula of the dehydration reaction of the hydrolyzed KH550 and tridecafluorooctyltriethoxysilane is provided for the embodiments of the present application.

[0050] Fig. 1 is a shell; 2, an image acquisition assembly; 3, a first glass substrate; 4, a first linear drive assembly; 5, a controller; 6, a moving assembly; 7, a substrate cleaning assembly; 8, a second linear drive assembly; 9, a handle; 10, a second adsorption assembly; 11, a second glass substrate. DETAILED DESCRIPTION

[0051] The technical solutions in the embodiments of the present application will be clearly and completely described below with reference to the drawings in the embodiments of the present application. Obviously, the described embodiments are only part of the embodiments of the present application, rather than all the embodiments. The components of the embodiments of the present application described and shown in the drawings herein can be arranged and designed in various different configurations. Therefore, the following detailed description of the embodiments of the present application provided in the drawings is not intended to limit the scope of the claimed present application, but only represents selected embodiments of the present application. Based on the embodiments of the present application, all other embodiments obtained by those skilled in the art without creative work are within the scope of protection of the present application.

[0052] It should be noted that: similar reference numbers and letters represent similar items in the following drawings, so once an item is defined in one drawing, it does not need to be further defined and explained in subsequent drawings. Meanwhile, in the description of the present application, the terms "first", "second", etc. are only used to distinguish the description, and cannot be understood as indicating or implying relative importance.

[0053] As shown in Figures 1-4 The present application provides a drop landing point observation system, when drop landing point observation is needed, the drop landing point observation system is placed below the nozzle to be observed, the drop landing point observation system comprises:

[0054] A shell 1;

[0055] An image acquisition assembly 2 is mounted on the shell 1;

[0056] A first glass substrate 3 is slidingly arranged on the shell 1 and located between the image acquisition assembly 2 and the nozzle to be observed, for carrying ink drops ejected by the nozzle to be observed;

[0057] A first linear drive assembly 4 is arranged on the shell 1, for driving the first glass substrate 3 to move horizontally;

[0058] The controller 5 is configured to generate a target nozzle screening diagram including a plurality of preset ink drops according to preset nozzle screening requirements and a preset interval, and to sequentially spray the plurality of ink drops onto the first glass substrate 3 through the nozzle to be observed, the first linear driving assembly 4 and the image acquisition assembly 2 based on the preset interval after the ink drop landing point observation system is placed below the nozzle to be observed, and sequentially acquire images of the ink drops newly landed on the first glass substrate 3, and then integrate all the images into an actual landing point image, and to analyze whether the nozzle to be observed is available according to the actual landing point image and the target nozzle screening diagram.

[0059] The ink drop landing point observation system provided in the embodiment is used for observing and analyzing the landing situation of ink drops sprayed by a to-be-observed nozzle (a nozzle needing ink drop landing point observation, not shown in the figure) on a glass substrate, so as to evaluate the performance of the to-be-observed nozzle. It should be understood that the ink drop landing point observation system provided in the present application can be used for ink drop landing point observation of one to-be-observed nozzle, and the ink drop landing point observation system provided in the present application can also be used for synchronous ink drop landing point observation of multiple to-be-observed nozzles. The housing 1 of the embodiment is the main structure of the ink drop landing point observation system, which is used for mounting and protecting 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 drop landing point observation system. The image acquisition assembly 2 of the embodiment is preferably a high-resolution CCD camera, which is used to acquire the image of the ink drops sprayed by the to-be-observed nozzle landing on the first glass substrate 3. The first glass substrate 3 of the embodiment is the carrier medium of the ink drops, and the surface characteristics have an important influence on the spreading and morphology of the ink drops. The sliding arrangement of the first glass substrate 3 can be realized by providing guide rails and sliding blocks on the housing 1 to ensure its stability and positioning accuracy during movement. The first linear drive assembly 4 of the embodiment is preferably an existing linear motor module or linear lead screw module, which is used to drive the first glass substrate 3 to move horizontally. Specifically, when the to-be-observed nozzle sprays ink drops and the image acquisition assembly 2 completes the acquisition of the image of the ink drops landing on the first glass substrate 3, the embodiment controls the first linear drive assembly 4 to drive the first glass substrate 3 to move a preset interval, so as to move the area on the first glass substrate 3 without ink drops to the position below the to-be-observed nozzle, and then controls the to-be-observed nozzle to spray new ink drops. Therefore, the embodiment can use the first linear drive assembly 4 to realize the sequential acquisition of the images of the ink drops sprayed by the to-be-observed nozzle without moving the to-be-observed nozzle. The preset nozzle screening requirements of the embodiment are a series of standards for evaluating the performance of the nozzle, such as the size and shape of the ink drops. The embodiment can obtain the preset nozzle screening requirements by first acquiring the image of the ink drops sprayed by the new nozzle, and then extracting the size and shape of the ink drops based on the image. The preset interval of the embodiment is the expected distance between adjacent ink drops on the first glass substrate 3. It should be understood that, since the first linear drive assembly 4 is controlled to move the first glass substrate 3 by a preset interval when the to-be-observed nozzle sprays ink drops and the image acquisition assembly 2 completes the acquisition of the image of the ink drops landing on the first glass substrate 3, the embodiment can avoid the overlapping of multiple ink drops sprayed by the to-be-observed nozzle. The target nozzle screening map of the embodiment is an ideal ink drop landing point distribution map generated according to the preset nozzle screening requirements and the preset interval, which is used for comparison with the actual landing point image.The actual landing point image of this embodiment is an image obtained by integrating (stitching) a plurality of images acquired by the image capturing component 2, and can reflect the actual landing point situation of the ink droplets.

[0060] The controller 5 of this embodiment is electrically connected with the to-be-observed nozzle, the image acquisition assembly 2 and the first linear driving assembly 4 respectively. The controller 5 of this embodiment can generate the target nozzle screening diagram including a plurality of preset ink drops according to the preset nozzle screening requirement and the preset interval by generating a plurality of preset ink drops according to the preset nozzle screening requirement first and then arranging the plurality of preset ink drops according to the preset interval. After the ink drop landing point observation system is placed below the to-be-observed nozzle, the controller 5 of this embodiment starts to coordinate the ink drop ejection and the image acquisition process. Specifically, the controller 5 controls the to-be-observed nozzle to eject ink drops to the first glass substrate 3 located below it. Since the image acquisition assembly 2 is located below the first glass substrate 3 and the first glass substrate 3 is transparent, the image acquisition assembly 2 acquires the image of the ink drop after the ink drop lands on the first glass substrate 3, so as to acquire the image of the ink drop newly landed on the first glass substrate 3 without moving the first glass substrate 3. That is, this embodiment is equivalent to acquiring the image of the ink drop before the shape of the ink drop is changed due to movement, so that the image can truly and accurately reflect the actual shape of the ink drop newly landed on the first glass substrate 3. After the image acquisition of one ink drop is completed, the controller 5 controls the first linear driving assembly 4 to drive the first glass substrate 3 to move by a preset interval. After the movement is completed, the to-be-observed nozzle ejects ink drops again, and the image acquisition assembly 2 acquires the image of the ink drops again. This process is repeated until a sufficient number of ink drop images (equivalent to the actual ink ejection times reaching the preset ink ejection times) are acquired. After the acquisition of all the preset number of ink drop images is completed, the controller 5 integrates these independent ink drop images into a complete actual landing point image, which reflects the actual distribution of the ink drops ejected by the to-be-observed nozzle on the first glass substrate 3. Finally, the controller 5 compares the integrated actual landing point image with the target nozzle screening diagram generated in advance, and analyzes the comparison. Specifically, this embodiment can determine whether the to-be-observed nozzle meets the preset screening requirement by comparing the landing position, size, shape and other characteristics of the actual ink drops with the characteristics of the preset ink drops in the target nozzle screening diagram, so as to determine whether the nozzle is usable. It should be understood that, since the image of the ink drop acquired by the present application is acquired in time before the shape of the ink drop is changed, the present application can effectively improve the accuracy and reliability of the ink drop landing point observation result.It should also be understood that, since the application is equivalent to a portable ink drop landing point observation system obtained by integrating the image acquisition assembly 2, the first glass substrate 3 and the first linear driving assembly 4 in the shell 1, when ink drop landing point observation is needed, the application can be placed under the nozzle to be observed by manual or automatic means, and when the ink drop landing point observation is completed or no ink drop landing point observation is needed, the application can be removed from the inkjet printing equipment by manual or automatic means, that is, the application does not need to integrate the ink drop landing point observation system in the inkjet printing equipment, so the application can reduce the size of the inkjet printing equipment or increase the available space of the inkjet printing equipment without changing the size of the inkjet printing equipment. Preferably, the controller 5 of this embodiment controls the control condition of the image acquisition assembly 2 as follows: the time difference between the current time node and the time node at which the latest ink drop is ejected from the nozzle to be observed reaches a preset time length, which is preferably the time required for the ink drop to fall on the first glass substrate 3 after being ejected from the nozzle to be observed.

[0061] The core innovation of the application is that the image acquisition assembly 2, the first glass substrate 3 and the first linear driving assembly 4 are integrated in the shell 1 to achieve the real-time image acquisition of the ink drop falling on the first glass substrate 3 without moving the first glass substrate 3. Since this real-time acquisition mechanism can effectively avoid the risk of shape change of the ink drop during movement and save the reciprocating movement time of the glass substrate between the inkjet position and the image acquisition position, the application can effectively improve the ink drop landing point observation efficiency and the accuracy and reliability of the ink drop landing point observation result.

[0062] In some preferred embodiments, after the ink drop landing point observation system is placed under the nozzle to be observed, a plurality of ink drops are sequentially ejected onto the first glass substrate 3 and the images of the latest ink drops falling on the first glass substrate 3 are sequentially acquired based on a preset interval through the cooperation of the nozzle to be observed, the first linear driving assembly 4 and the image acquisition assembly 2, and then all the images are integrated into an actual landing point image.

[0063] A1, after the ink drop landing point observation system is placed under the nozzle to be observed, the nozzle to be observed is controlled to eject an ink drop onto the first glass substrate 3, and then the image acquisition assembly 2 is used to acquire an image containing the ink drop falling on the first glass substrate 3;

[0064] A2, the first linear driving assembly 4 is controlled to drive the first glass substrate 3 to move according to a preset interval;

[0065] A3, controlling the to-be-observed nozzle to spray ink drops to the first glass substrate 3, and then collecting an image containing the ink drops falling on the first glass substrate 3 by using the image collection component 2;

[0066] A4, analyzing whether the number of ink spraying times of the to-be-observed nozzle reaches a preset number, if yes, executing step A5, if not, returning to step A2;

[0067] A5, integrating the ink drops in all images to obtain an actual landing point image of the multiple ink drops falling on the first glass substrate 3.

[0068] In step A1, the nozzle to be observed is controlled to eject a droplet onto the first glass substrate 3, and then the image acquisition assembly 2 is used to capture the image of the droplet falling on the first glass substrate 3, which can ensure that the initial landing pattern of each droplet can be accurately recorded. In step A2, after the image acquisition of a single droplet is completed, the controller 5 controls the first linear driving assembly 4 to drive the first glass substrate 3 to move horizontally according to a preset interval, which ensures that the subsequent ejected droplets have uniform intervals on the first glass substrate 3, so as to facilitate subsequent analysis and integration. In step A3, after the first glass substrate 3 is moved into position, the nozzle to be observed is controlled to eject a droplet again, and the image acquisition assembly 2 captures the image of the droplet again, step A3 is similar to step A1, and step A3 is used to obtain the landing image of the next droplet. The controller 5 of this embodiment records the number of ink ejections of the nozzle to be observed, and in step A4, the controller 5 compares the number of ink ejections of the nozzle to be observed with a preset number of times, if the number of ink ejections has not reached the preset number of times, the system returns to step A2 to continue the movement of the first glass substrate 3, the ejection of the next droplet and the image acquisition; if the number of ink ejections reaches the preset number of times, it indicates that the images of multiple droplets falling on the first glass substrate 3 have been completely acquired, and the system will enter the subsequent image processing stage. In step A5, all the acquired single droplet images are integrated by the controller 5 to generate a complete actual landing image, it should be understood that step A5 belongs to the existing image integration technology in the art, and its working principle and working process will not be discussed here. This embodiment realizes the sequential acquisition and integration of multiple droplet landing images through steps A1-A5, specifically, after each droplet is ejected onto the first glass substrate 3, the image acquisition assembly 2 immediately acquires its image to ensure that the droplet is recorded before its shape changes, then the first linear driving assembly 4 accurately moves the first glass substrate 3 according to the preset interval to provide a new landing area for the ejection and acquisition of the next droplet, this cycle continues until the preset number of ink ejections is reached. Finally, all the independent droplet images are integrated by the controller 5 to form an actual landing image reflecting the overall droplet landing distribution. This strategy of sequential acquisition and step-by-step movement effectively avoids the distortion of the droplet shape caused by moving the glass substrate before acquiring the image in the traditional scheme, thereby effectively improving the authenticity and accuracy of the acquired image.

[0069] In some preferred embodiments, the nozzle to be observed is provided with a preset target (not shown in the figure), and the droplet landing observation system further comprises a moving assembly 6 installed in the housing 1, and the image acquisition assembly 2 is installed in the housing 1 through the moving assembly 6, and step A1 comprises:

[0070] A11, after the ink drop landing point observation system is placed below the nozzle to be observed, it is analyzed whether the preset target is completely exposed in the field of view of the image acquisition assembly 2, if yes, step A12 is executed, if not, the moving assembly 6 is controlled to drive the image acquisition assembly 2 to move in the housing 1 until the preset target is completely exposed in the field of view of the image acquisition assembly 2, and then step A12 is executed;

[0071] A12, the nozzle to be observed is controlled to spray ink drops to the first glass substrate 3, and then the image acquisition assembly 2 is used to collect the image containing the ink drops landing on the first glass substrate 3.

[0072] The preset target of this embodiment refers to a specific mark or pattern arranged on the nozzle to be observed, and this embodiment is equivalent to taking the preset target as a reference point for positioning and calibration of the image acquisition assembly 2. The preset target can be a cross line, a circular mark or a specific coded pattern. The moving assembly 6 of this embodiment can be a linear module, a stepping motor driven sliding table or any mechanism capable of realizing accurate position adjustment of the image acquisition assembly 2 in the housing 1. The moving assembly 6 is preferably an existing camera motion stage. The moving assembly 6 is used to drive the image acquisition assembly 2 to move in the housing 1 to ensure that the preset target can be completely entered into the field of view of the image acquisition assembly 2. Step A11 can use existing image processing algorithms to analyze whether the preset target is completely exposed in the field of view of the image acquisition assembly 2. Specifically, the analysis process of step A11 can be: based on the existing image processing algorithm, the target in the image currently collected by the image acquisition assembly 2 is recognized to identify whether the preset target exists in the field of view of the image acquisition assembly 2 and whether it is complete and located at the expected position (for example, the center of the field of view). If the analysis result shows that the preset target is not completely exposed or the position is not accurate, the controller 5 will issue an instruction to the moving assembly 6 to drive the image acquisition assembly 2 to make corresponding displacement adjustment until the preset target is accurately captured. Since after the ink drop landing point observation system is placed below the nozzle to be observed, the preset target is first positioned by the image acquisition assembly 2 in this embodiment. If the preset target is not completely exposed in the field of view of the image acquisition assembly 2, the position of the image acquisition assembly 2 is accurately adjusted by the moving assembly 6 until the preset target is accurately captured. Therefore, by setting the preset target on the nozzle to be observed and introducing the moving assembly 6 to adjust the position of the image acquisition assembly 2, this embodiment realizes accurate positioning and calibration of the image acquisition assembly 2 before spraying ink drops, so as to avoid the problem of incomplete or inaccurate image acquisition caused by initial position deviation and make the ink drops sprayed by the nozzle to be observed accurately land in the observation area of the image acquisition assembly 2, thereby effectively improving the accuracy and consistency of ink drop image acquisition, and further effectively improving the reliability and accuracy of the ink drop landing point observation result.

[0073] In some preferred embodiments, the target nozzle screening map comprises a plurality of preset ink drop landing points, each ink drop landing on the first glass substrate corresponds to one preset ink drop landing point, and the process of analyzing whether the to-be-observed nozzle is available according to the actual landing point image and the target nozzle screening map comprises:

[0074] B1, obtaining, according to the actual landing point image, ink drop boundary information, ink drop center point coordinate information and ink drop actual fitting diameter information corresponding to each ink drop landing on the first glass substrate 3;

[0075] B2, counting the number of abnormal ink drops, the number of abnormal ink drops being the total number of ink drops that meet at least one of the following conditions: the actual definition of the corresponding ink drop boundary information is less than the preset definition, the deviation of the ink drop center point coordinate information from the preset center point coordinate information of the corresponding preset ink drop landing point is greater than the preset coordinate deviation, the deviation of the ink drop actual fitting diameter information from the preset fitting diameter information of the corresponding preset ink drop landing point is greater than the preset diameter deviation, or the deviation of the spacing between adjacent ink drops in the actual landing point image from the preset spacing is greater than the preset spacing deviation;

[0076] B3, analyzing whether the number of abnormal ink drops is greater than the preset number, if yes, considering that the to-be-observed nozzle is unavailable, and if no, considering that the to-be-observed nozzle is available.

[0077] After obtaining the actual landing image, step B1 can utilize existing image processing techniques to identify and analyze each ink droplet in the image. Specifically, the ink droplet boundary information refers to the outline or edge data of the ink droplet in the image, which 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, which is used to evaluate the landing accuracy of the ink droplet. The ink droplet actual fitting diameter information refers to the diameter or equivalent diameter obtained by fitting the ink droplet outline (e.g., fitting to a circle or ellipse), which is used to evaluate the size and ejection amount of the ink droplet. In step B2, the above obtained ink droplet information is evaluated in multiple dimensions. The pre-set clarity is a threshold for judging the quality of the ink droplet image. If the actual clarity of the ink droplet boundary information is lower than the pre-set clarity, it indicates that the ejection speed of the ink droplet is insufficient. The pre-set coordinate deviation is the maximum allowable deviation of the ink droplet center point coordinates, which is used to judge whether the ink droplet landing position deviates from the target position. The pre-set diameter deviation is the maximum allowable fluctuation range of the ink droplet actual fitting diameter, which is used to judge whether the size of the ink droplet meets the requirements. The pre-set spacing deviation is the maximum allowable deviation of the spacing between adjacent ink droplets, which is used to judge whether the spacing between the ink droplets ejected by the nozzle is uniform. When any of the indicators of the ink droplet exceeds the pre-set threshold, the ink droplet is recorded as an abnormal ink droplet. The number of abnormal ink droplets in this embodiment is the total number of abnormal ink droplets. This embodiment is equivalent to quantifying the degree of performance defect of the nozzle by counting the number of abnormal ink droplets. In step B3, the number of abnormal ink droplets obtained by statistics is compared with the pre-set number. The pre-set number is a pre-set threshold for judging whether the overall performance of the nozzle meets the acceptable standard. If the number of abnormal ink droplets exceeds the pre-set number, it indicates that the to-be-observed nozzle has more ink ejection defects and is judged as unusable. Conversely, if the number of abnormal ink droplets does not exceed the pre-set number, it is considered that the performance of the to-be-observed nozzle is within the acceptable range and is judged as usable. This embodiment effectively solves the problem of unclear analysis standard and strong subjectivity of results in traditional methods by introducing a detailed and quantitative nozzle usability analysis process. Specifically, in step B1, the key information such as ink droplet boundary information, ink droplet center point coordinate information, and ink droplet actual fitting diameter information is accurately extracted, laying a data foundation for subsequent quantitative evaluation. It is precisely due to these detailed ink droplet feature data that the ink droplet ejection quality can be carefully checked in multiple dimensions (including ink droplet clarity, landing accuracy, size consistency, and spacing between adjacent ink droplets) in step B2. By comparing these actual measurement values with the pre-set performance standards and counting the number of abnormal ink droplets exceeding the standards, the present application can objectively identify and quantify various defects of the nozzle.Finally, in step B3, by comparing the accumulated number of abnormal ink drops with the preset number, a clear, data-driven judgment standard is provided, avoiding errors caused by subjective judgment and ensuring the accuracy and consistency of nozzle availability evaluation.

[0078] In some preferred embodiments, the ink drop landing point observation system further comprises a substrate cleaning assembly 7, a second linear driving assembly 8 and a pressing assembly (not shown in the figure), the pressing assembly is installed on the housing 1 and located below the first glass substrate 3, the substrate cleaning assembly 7 is slidingly installed on the housing 1 and located above the first glass substrate 3, the second linear driving assembly 8 is installed on the housing 1 and connected with the substrate cleaning assembly 7, and the controller 5 is further used to control the first linear driving assembly 4 to move the first glass substrate 3 to a cleaning station after the collection of the actual landing point image is completed, and then the first glass substrate 3 is cleaned by the cooperation of the substrate cleaning assembly 7, the pressing assembly and the second linear driving assembly 8. The substrate cleaning assembly 7 of this embodiment is slidingly installed on the housing 1 and located above the first glass substrate 3, the second linear driving assembly 8 of this embodiment is installed on the housing 1 and connected with the substrate cleaning assembly 7, the second linear driving assembly 8 can be an existing linear motor module or a linear screw module, and the second linear driving assembly 8 is used to provide the substrate cleaning assembly 7 with accurate linear movement capability, so as to move the substrate cleaning assembly 7 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 pressing assembly of this embodiment can be a composite structure composed of a pressing block and a driving mechanism, and the pressing assembly is used to press and fix the first glass substrate 3 on the housing 1 by driving the first glass substrate 3 to rise during the cleaning process, so as to ensure the stability of the first glass substrate 3 on the cleaning station and enable the first glass substrate 3 to be cleaned smoothly. Since the ink drops on the first glass substrate 3 can be removed immediately after the collection of the actual landing point image is completed through the cooperation of the first linear driving assembly 4, the second linear driving assembly 8, the substrate cleaning assembly 7 and the pressing assembly, the embodiment can effectively avoid the situation that the ink drops falling on the first glass substrate 3 are not removed in time, the ink drop solvent evaporates, the ink drops remain on the first glass substrate 3 after cleaning, and the first glass substrate 3 cannot be used for ink drop landing point observation.

[0079] In some preferred embodiments, the substrate cleaning assembly 7 comprises a scraper, and the process of cleaning the first glass substrate 3 by the cooperation of the substrate cleaning assembly 7, the pressing assembly and the second linear driving assembly 8 comprises:

[0080] C1、after the first glass substrate 3 is moved to the cleaning station, the pressing assembly is controlled to press and fix the first glass substrate 3 upward on the housing 1 and make the scraper contact the top surface of the first glass substrate 3;

[0081] C2, control the second linear drive assembly 8 to drive the squeegee to move relative to the first glass substrate 3 to clean the first glass substrate 3 by scraping the ink drops on the top surface of the first glass substrate 3 with the squeegee.

[0082] The squeegee of this embodiment is a sheet or strip-shaped component with certain hardness and toughness. Specifically, the squeegee includes a support part and a contact part. The material of the support part is preferably stainless steel to improve the corrosion resistance of the squeegee and prolong the service life of the squeegee. The material of the contact part is preferably a flexible material such as soft rubber, silicone or non-woven fabric to avoid scratching the first glass substrate 3 during cleaning. Preferably, when the pressing assembly presses and fixes the first glass substrate 3 on the housing 1, the contact part is in interference fit with the first glass substrate 3 to enable the squeegee to generate sufficient extrusion force to remove the ink drops on the first glass substrate 3. When the first glass substrate 3 is moved to the preset cleaning station by the first linear drive assembly 4, step C1 controls the pressing assembly to press and fix the first glass substrate 3 on the housing 1 and make the squeegee contact the top surface of the first glass substrate 3 to avoid displacement of the first glass substrate 3 due to stress during cleaning and enable the squeegee to effectively act on the ink drops. In step C2, the controller 5 controls the second linear drive assembly 8 to drive the squeegee to move relative to the first glass substrate 3 to make the squeegee physically contact the ink drops on the top surface of the first glass substrate 3 by reciprocating or moving in one direction along the length or width direction of the first glass substrate 3, thereby scraping the ink drops off the glass substrate surface. This mechanical scraping method can effectively remove the ink drops attached to the first glass substrate 3, thereby achieving effective cleaning of the first glass substrate 3. The introduction of the squeegee and its cooperation with the pressing assembly and the second linear drive assembly 8 in this embodiment can ensure that the ink drops can be effectively scraped off the surface of the first glass substrate 3, i.e., this embodiment can effectively reduce the possibility of ink drop residue, thereby effectively improving the cleanliness of the surface of the cleaned first glass substrate 3 to provide an interference-free clear surface for subsequent ink drop landing point observation, thereby effectively improving the accuracy and reliability of the subsequent ink drop landing point observation results.

[0083] In some preferred embodiments, the ink drop landing point observation system further includes a first adsorption assembly (not shown) and a second glass substrate 11. When the actual landing point image is collected using the first glass substrate 3, the second glass substrate 11 is located below the substrate cleaning assembly 7, the first adsorption assembly is installed on the substrate cleaning assembly 7, and the second glass substrate 11 is slidably placed on the housing 1. After the collection of the actual landing point image is completed, the process of moving the first glass substrate 3 to the cleaning station by the first linear drive assembly 4 includes:

[0084] D1, after the collection of the actual landing point image is completed and the second glass substrate 11 is in a completed cleaning state, the pressing assembly is controlled to press and fix the second glass substrate 11 upward on the shell 1, the first adsorption assembly is controlled to adsorb the second glass substrate 11, and then the pressing assembly is controlled to reset;

[0085] D2, the first linear drive assembly 4 is controlled to move the first glass substrate 3 to a cleaning station, the second linear drive assembly 8 is controlled to move the second glass substrate 11 to a droplet landing point observation station through the substrate cleaning assembly 7, and then the first adsorption assembly is controlled to release the adsorption of the second glass substrate 11 and the second linear drive assembly 8 is controlled to reset.

[0086] The first adsorption assembly of this embodiment is a device for adsorbing and fixing the second glass substrate 11, which can be a vacuum chuck, an electromagnetic chuck or other mechanical structure with adsorption function, and its purpose is to ensure that the second glass substrate 11 can be stably grabbed and moved during the switching of the glass substrate. It should be understood that when the first adsorption assembly 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, so this embodiment can use the first linear drive assembly 4 to transfer the first glass substrate 3 that has completed ink drop observation from the ink drop landing point observation station to the cleaning station and transfer the second glass substrate 11 that has completed cleaning from the cleaning station to the ink drop landing point observation station. The ink drop landing point observation station refers to the position directly above the image acquisition assembly 2, i.e., the position where ink drop image acquisition can be performed. It should also be understood that after the second glass substrate 11 completes ink drop landing point observation and the first glass substrate 3 completes cleaning, the same method can be used to transfer the second glass substrate 11 that has completed ink drop observation from the ink drop landing point observation station to the cleaning station and transfer the first glass substrate 3 that has completed cleaning from the cleaning station to the ink drop landing point observation station. The second glass substrate 11 of this embodiment is preferably the same as the first glass substrate 3 in terms of structure and function, i.e., both the first glass substrate 3 and the second glass substrate 11 are used to carry the ink drops ejected by the nozzles to be observed and can perform image acquisition and cleaning. They are slidably placed on the housing 1, meaning that they can be precisely positioned by the linear drive assembly. After the actual landing point image is acquired, step D1 checks whether the second glass substrate 11 has completed cleaning (equivalent to determining whether the second glass substrate 11 is in a usable state). If so, the pressing assembly presses and fixes the second glass substrate 11 upward on the housing 1, so that the first adsorption assembly can adsorb the second glass substrate 11, thereby firmly fixing the second glass substrate 11 on the substrate cleaning assembly 7. After adsorption is completed, the pressing assembly resets and releases the pressing of the second glass substrate 11. In step D2, the first linear drive assembly 4 moves the first glass substrate 3 that has completed ink drop landing point observation to the cleaning station to prepare for cleaning, and at the same time, the second linear drive assembly 8 moves the second glass substrate 11 that has completed cleaning to the ink drop landing point observation station through the substrate cleaning assembly 7 (at this time, the substrate cleaning assembly 7 carries the adsorbed second glass substrate 11). After moving the second glass substrate 11 to the ink drop landing point observation station, the first adsorption assembly is controlled to release the adsorption of the second glass substrate 11, and then the second linear drive assembly 8 is controlled to reset, so as to use the second glass substrate 11 for ink drop observation and clean the first glass substrate 3. In this way, the synchronous or quasi-synchronous switching of the two glass substrates is realized, one for cleaning and the other for observation immediately, thereby greatly improving the operating efficiency of the system.The scheme of the present application introduces the second glass substrate 11 and the first adsorption assembly, and optimizes the switching process of the glass substrate, so that the ink drop landing point observation system can realize continuous or quasi-continuous observation operation. Specifically, when the first glass substrate 3 completes the ink drop image acquisition and needs to be cleaned, the system can move the second glass substrate 11 which has been cleaned from the cleaning station to the ink drop landing point observation station, and move the first glass substrate 3 which has completed the ink drop landing point observation from the ink drop landing point observation station to the cleaning station. After the switching of the glass substrate is completed, the embodiment can again perform ink drop landing point observation, i.e. the embodiment does not need to wait for the first glass substrate 3 to be cleaned before performing the next observation. Therefore, the embodiment can effectively avoid the idle time of the system caused by waiting for the glass substrate to be cleaned, thereby effectively improving the efficiency of multiple ink drop landing point observations, and providing a more efficient solution for rapid screening and quality control of nozzles.

[0087] In some preferred embodiments, the substrate cleaning assembly 7 further comprises a cleaning agent releasing assembly for releasing cleaning agent when cleaning the first glass substrate 3 or the second glass substrate 11. The cleaning agent releasing assembly of the embodiment can be understood as a device for storing and spraying, dripping or coating cleaning agent on demand. The embodiment can assist the scraper in cleaning the glass substrate more thoroughly by releasing cleaning agent using the cleaning agent releasing assembly when cleaning the first glass substrate 3 or the second glass substrate 11. The cleaning agent releasing assembly can include but is not limited to a nozzle, a dropper, a brush head or a roller, and can be connected to a cleaning agent storage tank through a pipeline. The cleaning agent of the embodiment can be selected according to the composition of the ink drop and the material of the glass substrate, for example, isopropyl alcohol, deionized water or special ink cleaning liquid can be used. The embodiment introduces the cleaning agent releasing assembly, which can release the cleaning agent in advance or synchronously when cleaning the first glass substrate 3 or the second glass substrate 11. The cleaning agent can soften, dissolve or emulsify the ink drops on the glass substrate to reduce the adhesion between the ink drops and the glass substrate. Therefore, when the scraper is scraped under the action of the cleaning agent, the ink drops are more easily removed, thereby significantly improving the cleaning efficiency and thoroughness and effectively avoiding the problem of ink drop residue caused by relying solely on the scraper to clean, to ensure the cleanliness of the glass substrate surface, thereby effectively improving the accuracy and reliability of the subsequent ink drop landing point observation results, prolonging the service life of the glass substrate and reducing the risk of misjudgment caused by incomplete cleaning.

[0088] In some preferred embodiments, the first glass substrate 3 and the second glass substrate 11 are both subjected to surface treatment, and the specific process of surface treatment includes:

[0089] The first glass substrate 3 and the second glass substrate 11 are pretreated to remove impurities on the first glass substrate 3 or the second glass substrate 11;

[0090] 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;

[0091] The fluorine-containing silane coupling agent is uniformly deposited 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 dehydrate the silane coupling agent and the fluorine-containing silane coupling agent.

[0092] The embodiment can remove impurities such as organic matter, inorganic matter, and dust on the surface of the glass substrate (the first glass substrate 3 and the second glass substrate 11) by pretreating the first glass substrate 3 and the second glass substrate 11, to ensure that the subsequent coating can be uniformly and firmly attached. The pretreatment can include physical cleaning (such as ultrasonic cleaning) and chemical cleaning (such as acid-base treatment or plasma treatment). The embodiment can form a layer of silane coupling agent on the surface of the glass substrate by uniformly coating the silane hydrolysis solution on the first glass substrate 3 and the second glass substrate 11 and heating the glass substrate. Specifically, the embodiment can use doctor blade coating, slot coating, ultrasonic atomization spraying, or spin coating to achieve uniform coating of the silane hydrolysis solution. The silane hydrolysis solution of the embodiment can be hydrolyzed KH550 or METS, which is a short-chain and non-fluorine-containing coupling agent. The silane coupling agent, as an intermediate layer, can react with the hydroxyl group on the surface of the glass substrate to form a covalent bond, and its other end has an active functional group, which provides a connection point for the subsequent deposition of the fluorine-containing silane coupling agent, thereby enhancing the adhesion of the coating. The embodiment can form a layer of fluorine-containing coating with low surface energy on the surface of the glass substrate by uniformly depositing the fluorine-containing silane coupling agent on the first glass substrate 3 and the second glass substrate 11 and heating the glass substrate, using the dehydration reaction between the silane coupling agent and the fluorine-containing silane coupling agent. The embodiment can use the same method as coating the silane hydrolysis solution to achieve uniform deposition of the fluorine-containing silane coupling agent. The fluorine-containing silane coupling agent used in the embodiment can be a fluorine-containing silane coupling agent with 13-17 fluorine atoms, such as tridecafluorooctyltriethoxysilane or heptadecafluorodecyltrimethoxysilane. The fluorocarbon chain structure of the fluorine-containing silane coupling agent used in the embodiment endows the coating with hydrophobic and oleophobic properties, so that the hydrophilic contact angle of the glass substrate surface is 90°-120°. Specifically, taking the silane hydrolysis solution as hydrolyzed KH550 and the fluorine-containing silane coupling agent as tridecafluorooctyltriethoxysilane as an example, the flow chart of the surface treatment of the glass substrate and the dehydration reaction chemical formula of the embodiment are as follows: Figure 5 and Figure 6The embodiment can make the contact angle of the ink drops with the first glass substrate 3 and the second glass substrate 11 in a suitable range by surface treatment of the first glass substrate 3 and the second glass substrate 11, so as to avoid the cases that the ink drops are in a spread state on the first glass substrate 3 and the second glass substrate 11 due to too small contact angle of the ink drops with the first glass substrate 3 and the second glass substrate 11, the ink drops overlap with each other, and the ink drops unexpectedly roll on the first glass substrate 3 and the second glass substrate 11 and the drop position changes unexpectedly due to too large contact angle of the ink drops with the first glass substrate 3 and the second glass substrate 11.

[0093] In some preferred embodiments, the ink drop landing observation system further comprises a light source installed on the housing 1, and the light source is used to irradiate the side of the first glass substrate 3 close to the nozzle to be observed. The light source of this embodiment is a device capable of emitting visible light or light of a specific wavelength. The light source can be an existing LED light array, a ring light source, a backlight source or a side light source. The light source is installed on the housing 1 and can effectively illuminate the area above the first glass substrate 3 to provide stable, uniform and sufficient illumination for the image acquisition assembly 2, so as to ensure that the outline, shape and landing point of the ink drops can be clearly captured when the ink drop image is acquired and the image blurring or distortion caused by insufficient or uneven illumination is avoided. This embodiment adds a light source to the ink drop landing observation system, so that when the ink drop landing observation system is placed below the nozzle to be observed and the ink drop image is acquired, the light source can provide stable illumination for the ink drops landing on the first glass substrate 3. Therefore, the image acquisition assembly 2 can obtain sufficient and uniform light when acquiring the ink drop image, thereby effectively improving the clarity and contrast of the acquired image, so that the image acquisition assembly 2 can overcome the influence of insufficient or unstable ambient light, and thus ensure that the actual shape and landing point information of the ink drops can be accurately captured and recorded.

[0094] In some preferred embodiments, the ink drop landing observation system further comprises a second adsorption assembly 10, which is slidingly installed on the housing 1, and the first linear driving assembly 4 is connected with the second adsorption assembly 10. The second adsorption assembly 10 is used to adsorb the first glass substrate 3 or the second glass substrate 11 located at the ink drop landing observation station, and the first linear driving assembly 4 drives the first glass substrate 3 or the second glass substrate 11 located at the ink drop landing observation station to move through the second adsorption assembly 10.

[0095] From the above, the ink drop landing point observation system provided in the application can realize image acquisition of the ink drop landing on the first glass substrate 3 in a manner that the image acquisition component 2, the first glass substrate 3 and the first linear driving component 4 are integrated in the shell 1, so that the ink drop can be sprayed to the first glass substrate 3 without moving the first glass substrate 3. Since the mechanism of the instant acquisition can effectively avoid the risk of the change of the shape of the ink drop in the moving process and save the reciprocating moving time of the glass substrate between the ink spraying position and the image acquisition position, the application can effectively improve the ink drop landing point observation efficiency and the accuracy and reliability of the ink drop landing point observation result.

[0096] In the embodiments provided in the application, it should be understood that, in this paper, the relationship terms such as first and second are only used to distinguish one entity or operation from another entity or operation, and do not necessarily require or imply any actual relationship or sequence between the entities or operations.

[0097] The above only describes the embodiments of the application and is not used to limit the protection scope of the application. For those skilled in the art, the application can have various modifications and changes. Any modification, equivalent replacement, improvement, etc. made within the spirit and principle of the application shall be included in the protection scope of the application.

Claims

1. An ink drop landing point observation system characterized by, When ink drop landing point observation is needed, the ink drop landing point observation system is placed below a nozzle to be observed, the ink drop landing point observation system comprises: a shell; an image acquisition assembly mounted on the shell; a first glass substrate slidingly arranged on the shell and located between the image acquisition assembly and the nozzle to be observed, for carrying ink drops ejected by the nozzle to be observed; a first linear drive assembly arranged on the shell, for driving the first glass substrate to move horizontally; a controller, configured to generate a target nozzle screening diagram comprising a plurality of preset ink drops according to preset nozzle screening requirements and a preset interval, and configured to, after the ink drop landing point observation system is placed below the nozzle to be observed, spray a plurality of ink drops onto the first glass substrate and sequentially acquire images of the ink drops newly landed on the first glass substrate based on the preset interval by cooperation of the nozzle to be observed, the first linear drive assembly and the image acquisition assembly, then integrate all the images into an actual landing point image, and analyze whether the nozzle to be observed is available according to the actual landing point image and the target nozzle screening diagram; the ink drop landing point observation system further comprises a substrate cleaning assembly, a second linear drive assembly and a pressing assembly, the pressing assembly is mounted on the shell and located below the first glass substrate, the substrate cleaning assembly is slidingly mounted on the shell and located above the first glass substrate, the second linear drive assembly is mounted on the shell and connected with the substrate cleaning assembly, and the controller is further configured to, after the actual landing point image is acquired, control the first linear drive assembly to move the first glass substrate to a cleaning station, and then clean the first glass substrate by cooperation of the substrate cleaning assembly, the pressing assembly and the second linear drive assembly; the substrate cleaning assembly comprises a scraper, and the process of cleaning the first glass substrate by cooperation of the substrate cleaning assembly, the pressing assembly and the second linear drive assembly comprises: C1, after the first glass substrate is moved to the cleaning station, the pressing assembly is controlled to press and fix the first glass substrate upward on the shell and make the scraper contact with a top surface of the first glass substrate; C2, the second linear drive assembly is controlled to drive the scraper to move relative to the first glass substrate, so as to clean the first glass substrate by scraping the ink drops on the top surface of the first glass substrate with the scraper; the ink drop landing point observation system further comprises a first adsorption assembly and a second glass substrate, when the actual landing point image is acquired by using the first glass substrate, the second glass substrate is located below the substrate cleaning assembly, the first adsorption assembly is mounted on the substrate cleaning assembly, and the second glass substrate is slidingly arranged on the shell, and the process of, after the actual landing point image is acquired, controlling the first linear drive assembly to move the first glass substrate to the cleaning station comprises: D1, after the collection of the actual drop point image is completed and the second glass substrate is in a completed cleaning state, the pressing assembly is controlled to press and fix the second glass substrate upward on the shell, the first adsorption assembly is controlled to adsorb the second glass substrate, and then the pressing assembly is controlled to reset; D2, the first linear driving assembly is controlled to move the first glass substrate to a cleaning station, the second linear driving assembly is controlled to move the second glass substrate to an ink drop point observation station through the substrate cleaning assembly, and then the first adsorption assembly is controlled to release the adsorption of the second glass substrate and the second linear driving assembly is controlled to reset.

2. The ink drop landing point observation system according to claim 1, characterized by, The process of spraying multiple ink drops onto the first glass substrate and collecting images of the ink drops newly landed on the first glass substrate based on the preset interval through the cooperation of the nozzle to be observed, the first linear driving assembly, and the image collection assembly after the ink drop point observation system is placed below the nozzle to be observed, and then integrating all the images into an actual drop point image includes: A1, after the ink drop point observation system is placed below the nozzle to be observed, the nozzle to be observed is controlled to spray ink drops onto the first glass substrate, and then the image collection assembly is used to collect images containing the ink drops landed on the first glass substrate; A2, the first linear driving assembly is controlled to drive the first glass substrate to move according to the preset interval; A3, the nozzle to be observed is controlled to spray ink drops onto the first glass substrate, and then the image collection assembly is used to collect images containing the ink drops landed on the first glass substrate; A4, whether the number of ink spraying times of the nozzle to be observed reaches a preset number is analyzed, if yes, step A5 is performed, and if no, step A2 is returned; A5, all the ink drops in the images are integrated to obtain an actual drop point image of multiple ink drops landed on the first glass substrate.

3. The ink drop landing point observation system according to claim 2, characterized by, The nozzle to be observed is provided with a preset target, the ink drop point observation system further includes a moving assembly, the moving assembly is installed in the shell, the image collection assembly is installed in the shell through the moving assembly, and step A1 includes: A11, after the ink drop point observation system is placed below the nozzle to be observed, whether the preset target is completely exposed in the field of view of the image collection assembly is analyzed, if yes, step A12 is performed, and if no, the moving assembly is controlled to drive the image collection assembly to move in the shell until the preset target is completely exposed in the field of view of the image collection assembly, and then step A12 is performed; A12, the nozzle to be observed is controlled to spray ink drops onto the first glass substrate, and then the image collection assembly is used to collect images containing the ink drops landed on the first glass substrate.

4. The ink drop landing point observation system according to claim 1, characterized by, The target nozzle screening diagram includes a plurality of preset ink drop landing points, each ink drop landing on the first glass substrate corresponds to a preset ink drop landing point, and the process of analyzing whether the to-be-observed nozzle is available according to the actual landing point image and the target nozzle screening diagram includes: B1, obtaining ink drop boundary information, ink drop center point coordinate information and ink drop actual fitting diameter information corresponding to each ink drop landing on the first glass substrate according to the actual landing point image; B2, counting the number of abnormal ink drops, the number of abnormal ink drops being the total number of ink drops that meet at least one of the following conditions: the actual clarity of the corresponding ink drop boundary information is less than a preset clarity, the deviation of the ink drop center point coordinate information from the preset center point coordinate information of the corresponding preset ink drop landing point is greater than a preset coordinate deviation, the deviation of the ink drop actual fitting diameter information from the preset fitting diameter information of the corresponding preset ink drop landing point is greater than a preset diameter deviation, or the spacing between adjacent ink drops in the actual landing point image deviates from the preset spacing by more than a preset spacing deviation; B3, analyzing whether the number of abnormal ink drops is greater than a preset number, if yes, considering that the to-be-observed nozzle is unavailable, and if no, considering that the to-be-observed nozzle is available.

5. The ink drop landing point observation system according to claim 1, characterized by, The substrate cleaning assembly further includes a cleaning agent releasing assembly for releasing a cleaning agent when cleaning the first glass substrate or the second glass substrate.

6. The ink drop landing point observation system according to claim 1, characterized by, The first glass substrate and the second glass substrate are both subjected to surface treatment, and the specific process of the surface treatment includes: pretreating the first glass substrate and the second glass substrate to remove impurities on the first glass substrate or the second glass substrate; uniformly applying a silane hydrolysis solution on the first glass substrate and the second glass substrate, and heating the first glass substrate and the second glass substrate to form a silane coupling agent on the first glass substrate and the second glass substrate; uniformly depositing a fluorine-containing silane coupling agent on the first glass substrate and the second glass substrate, and heating the first glass substrate and the second glass substrate to cause the silane coupling agent and the fluorine-containing silane coupling agent to undergo dehydration reaction.

7. The ink drop landing point observation system according to claim 1, characterized by, The ink drop landing observation system further includes a light source mounted on the housing, and the light source is used to irradiate one side of the first glass substrate close to the to-be-observed nozzle.

Images