Method and device for printing cover layer of display device

Abstract

Disclosed in the present application are a method and device for printing a cover layer of a display device. The method comprises: recognizing a boundary area of metal wiring on a display panel, and on the basis of the boundary area and a thickness parameter, determining printing parameters of a retaining wall layer; according to an area to be covered between the boundary area of the metal wiring and a display area and the thickness parameter, determining printing parameters of a cover layer; and blending a retaining wall layer material on the basis of a preset cover layer material, controlling a first printing valve to perform printing processing, and controlling a second printing valve to perform printing processing. The mode of successively printing the retaining wall layer and the cover layer can effectively ensure the height consistency and the shape regularity of the cover layer; and second, the position of the retaining wall layer is located at the boundary of the metal wiring, and by means of the characteristic of the cover layer material being miscible with the retaining wall layer material, the overall coverage range of the cover layer is not affected, thereby achieving accurate control of the cover layer, further ensuring the visual experience of users under high requirements, and remarkably improving the competitiveness of display products.

Description

Method and device for printing protective layer of display device Technical Field

[0001] The present application belongs to the technical field of display panel processing, and in particular relates to a method and apparatus for printing a protective layer of a display device. Background Art

[0002] In recent years, "high screen-to-body ratio" and even "full-screen" designs have gradually become the mainstream design for electronic products such as mobile phones, tablets, laptops, and televisions. This "high screen-to-body ratio" or "full-screen" means that within the same volume, the display device will have a larger display area, which can effectively improve the user experience. One of the most effective ways to increase the screen-to-body ratio is to bend the screen driver IC and hide it on the side of the OLED screen. However, during the bending process, how to effectively protect the fragile metal traces has become one of the most important links. Currently, panel manufacturers on the market will directly use piezoelectric valves or other inkjet devices to apply a layer of soft UV-curable adhesive material as a metal cover layer (MCL) on the metal traces before bending. This protects the metal traces and enhances the resistance and durability of the flexible board, thereby reducing bright lines and risks during the bending process and subsequent product use.

[0003] However, the coating materials used in existing technologies have low viscosity and high fluidity. Directly printing with traditional piezoelectric valves cannot maintain the thickness and line shape of the protective layer, which not only greatly reduces the protective effect but also affects the user's visual experience under high demands. Summary of the Invention

[0004] This application aims to solve the aforementioned technical problems of low viscosity and high fluidity of the coating material, which makes it impossible to maintain the thickness and line shape of the protective layer after direct printing using traditional piezoelectric valves. This not only greatly reduces the protective effect but also affects the user's visual experience under high demands. A method and device for printing a protective layer for a display device are proposed. The technical solution is as follows:

[0005] In a first aspect, an embodiment of the present application provides a method for printing a protective layer of a display device, comprising:

[0006] Identifying a boundary area of ​​the metal trace on the display panel, and determining printing parameters of the retaining wall layer based on the boundary area of ​​the metal trace and a preset thickness parameter;

[0007] Determining printing parameters of the protective layer based on a protective area between a boundary area of ​​the metal traces on the display panel and the display area, and a preset thickness parameter;

[0008] A retaining wall layer material is prepared based on a preset protective layer material, and the first printing valve is controlled to perform printing based on the printing parameters of the retaining wall layer and the retaining wall layer material, and the second printing valve is controlled to perform printing based on the printing parameters of the protective layer and the preset protective layer material; wherein the preset protective layer material is miscible with the retaining wall layer material.

[0009] In an optional solution of the first aspect, before determining the printing parameters of the retaining wall layer based on the boundary area of ​​the metal trace and the preset thickness parameters, the method further includes:

[0010] Fixing the bottom of the display panel on the suction cup, and identifying at least two marking points on the substrate surface of the display panel based on the top camera;

[0011] Determine whether a line formed by any two adjacent marking points is parallel to a calibration line; wherein the calibration line corresponds to the movement direction of the first printing valve;

[0012] When it is detected that the connecting line is not parallel to the calibration line, the suction cup is rotated based on the angle between the connecting line and the calibration line until the connecting line is parallel to the calibration line;

[0013] When it is detected that the connecting line is parallel to the calibration line, the position of each marking point in the preset spatial rectangular coordinate system is determined;

[0014] The printing parameters of the retaining wall layer are determined based on the boundary area of ​​the metal trace and the preset thickness parameters, including:

[0015] The printing parameters of the retaining wall layer are determined based on the boundary area of ​​the metal trace, the preset thickness parameters, and the position of each marking point.

[0016] In another optional solution of the first aspect, determining the printing parameters of the retaining wall layer based on the boundary area of ​​the metal trace, the preset thickness parameter, and the position of each marking point includes:

[0017] Based on the position of each marker point, determine the vertex position farthest from the display area in the boundary area of ​​the metal trace, and use the vertex position as the initial printing position of the retaining wall layer;

[0018] Determine the printing path of the retaining wall layer according to the boundary line farthest from the display area in the boundary area of ​​the metal routing and the preset thickness parameter;

[0019] The initial printing position of the retaining wall layer and the printing path of the retaining wall layer are used as the printing parameters of the retaining wall layer.

[0020] In another optional solution of the first aspect, determining printing parameters of the protective layer based on a protective area between a boundary area of ​​the metal traces on the display panel and the display area, and a preset thickness parameter, includes:

[0021] Based on the position of each marking point, determine the vertex position closest to the display area in the protection area, and use the vertex position as the initial printing position of the protection layer;

[0022] Determining the bottom surface area of ​​the protective layer according to the length and width of the metal trace corresponding to the protection area, and determining the printing path of the protective layer based on the bottom surface area of ​​the protective layer and a preset thickness parameter;

[0023] The initial printing position of the protective layer and the printing path of the protective layer are used as printing parameters of the protective layer.

[0024] In another optional solution of the first aspect, the retaining wall layer material is prepared based on the preset protective layer material, including:

[0025] Mixing the preset protective layer material and the thixotropic agent according to a preset volume ratio to prepare the retaining wall layer material; or

[0026] The preset protective layer material and thickener are mixed according to a preset volume ratio to prepare the retaining wall layer material.

[0027] In another optional solution of the first aspect, before controlling the first printing valve to perform printing based on the printing parameters of the retaining wall layer and the retaining wall layer material, the method further includes:

[0028] Controlling the laser sensor to scan the substrate surface of the display panel to obtain the height of the substrate surface of the display panel;

[0029] Measuring the current height of the first printing valve and obtaining the target height based on the difference between the current height, the substrate surface height, and the preset printing height;

[0030] The first printing valve is controlled to move vertically downward based on the target height, so that the height between the first printing valve and the substrate surface of the display panel is a preset printing height.

[0031] In another optional solution of the first aspect, before controlling the second printing valve to perform printing based on the printing parameters of the protective layer and the preset protective layer material, the method further includes:

[0032] When it is detected that the preset thickness parameter is in a preset first thickness range, determining that the type of the second printing valve is a piezoelectric printing valve;

[0033] When it is detected that the preset thickness parameter is in a preset second thickness range, determining that the type of the second printing valve is an inkjet printing valve; or

[0034] When it is detected that the preset thickness parameter is in a preset second thickness range, the type of the second printing valve is determined to be a direct writing printing valve; wherein the preset first thickness range is smaller than the preset second thickness range.

[0035] In another optional solution of the first aspect, before controlling the first printing valve to perform printing based on the printing parameters of the retaining wall layer and the retaining wall layer material, the method further includes:

[0036] Acquiring a substrate surface image of a display panel;

[0037] When impurities are identified on the substrate surface in the substrate surface image, the substrate surface of the display panel is subjected to a solvent wiping process; or

[0038] When impurities are identified on the substrate surface in the substrate surface image, an air knife blowing treatment is performed on the substrate surface of the display panel.

[0039] In yet another optional solution of the first aspect, after controlling the first printing valve to perform printing based on the printing parameters and the material of the retaining wall layer, and before controlling the second printing valve to perform printing based on the printing parameters and the preset material of the protective layer, the method further includes:

[0040] The retaining wall layer on the surface of the substrate is cured.

[0041] In another optional solution of the first aspect, after the retaining wall layer on the surface of the substrate is cured and before the second printing valve is controlled to perform printing based on the printing parameters of the protective layer and the preset protective layer material, the method further includes:

[0042] The retaining wall layer on the surface of the substrate is surface treated.

[0043] In a second aspect, an embodiment of the present application provides a protective layer printing device for a display device, comprising:

[0044] A first determining module is configured to identify a boundary area of ​​the metal trace on the display panel, and determine printing parameters of the retaining wall layer based on the boundary area of ​​the metal trace and a preset thickness parameter;

[0045] A second determining module is configured to determine printing parameters of the protective layer according to a protective area between a boundary area of ​​the metal traces on the display panel and the display area, and a preset thickness parameter;

[0046] A printing processing module is used to prepare a retaining wall layer material based on a preset protective layer material, and to control a first printing valve to perform printing processing based on the printing parameters of the retaining wall layer and the retaining wall layer material, and to control a second printing valve to perform printing processing based on the printing parameters of the protective layer and the preset protective layer material; wherein the preset protective layer material is miscible with the retaining wall layer material.

[0047] In a third aspect, an embodiment of the present application further provides a protective layer printing device for a display device, comprising a processor and a memory;

[0048] The processor is connected to the memory;

[0049] a memory for storing executable program code;

[0050] The processor runs the program corresponding to the executable program code by reading the executable program code stored in the memory, so as to implement the protective layer printing method of the display device provided by the first aspect of the embodiment of the present application or any one of the implementation methods of the first aspect.

[0051] In a fourth aspect, the present application provides a computer storage medium storing a computer program, wherein the computer program includes program instructions. When the program instructions are executed by a processor, the protective layer printing method of the display device provided in the first aspect of the embodiment of the present application or any one of the implementation methods of the first aspect can be implemented. Beneficial effects

[0052] When printing a protective layer for the metal traces of a display panel, the boundary area of ​​the metal traces can be identified on the display panel, and the printing parameters of the retaining wall layer can be determined based on the boundary area of ​​the metal traces and a preset thickness parameter. The printing parameters of the protective layer can be determined based on the protective area between the boundary area of ​​the metal traces and the display area on the display panel, as well as the preset thickness parameter. The retaining wall layer material is prepared based on the preset protective layer material, and the first printing valve is controlled to perform printing based on the printing parameters of the retaining wall layer and the retaining wall layer material, and the second printing valve is controlled to perform printing based on the printing parameters of the protective layer and the preset protective layer material. By sequentially printing the retaining wall layer and the protective layer, the thickness consistency and shape regularity of the protective layer can be effectively guaranteed. Secondly, the retaining wall layer is located at the boundary of the metal traces. The miscibility of the protective layer material and the retaining wall layer material can be utilized to ensure that the retaining wall layer and the protective layer do not affect the coverage of the protective layer after being miscible. This not only achieves precise control of the protective layer and ensures a high-quality visual experience for users, but also significantly enhances the competitiveness of display products. BRIEF DESCRIPTION OF THE DRAWINGS

[0053] In order to more clearly illustrate the technical solutions in the embodiments of the present application, the following briefly introduces the drawings required for use in the embodiments. Obviously, the drawings described below are only some embodiments of the present application. For ordinary technicians in this field, other drawings can be obtained based on these drawings without creative work.

[0054] FIG1 is a schematic diagram of a printing effect of an existing protective layer provided in an embodiment of the present application;

[0055] FIG2 is an overall flow chart of a method for printing a protective layer of a display device provided in an embodiment of the present application;

[0056] FIG3 is a schematic structural diagram of a printing valve provided in an embodiment of the present application;

[0057] FIG4 is a schematic diagram of a printing effect of a retaining wall layer provided in an embodiment of the present application;

[0058] FIG5 is a schematic diagram of a printing effect of a protective layer provided in an embodiment of the present application;

[0059] FIG6 is a schematic diagram of the effect of an integral protective layer provided in an embodiment of the present application;

[0060] FIG7 is a schematic diagram of the effect of another integral protective layer provided in an embodiment of the present application;

[0061] FIG8 is a schematic structural diagram of a protective layer printing device for a display device provided in an embodiment of the present application;

[0062] FIG9 is a schematic structural diagram of a protective layer printing device of another display device provided in an embodiment of the present application. DETAILED DESCRIPTION

[0063] The technical solutions in the embodiments of the present application will be described clearly and completely below in conjunction with the drawings in the embodiments of the present application.

[0064] In the following introduction, the terms "first" and "second" are used for descriptive purposes only and should not be understood as indicating or implying relative importance. The following introduction provides multiple embodiments of the present application. Different embodiments can be replaced or combined, so the present application can also be considered to include all possible combinations of the same and / or different embodiments described. Therefore, if one embodiment includes features A, B, and C, and another embodiment includes features B and D, then the present application should also be considered to include embodiments containing one or more of all other possible combinations of A, B, C, and D, even though the embodiment may not be clearly described in the following text.

[0065] The following description provides examples and does not limit the scope, applicability, or examples set forth in the claims. Changes may be made to the function and arrangement of the elements described without departing from the scope of the present application. Various examples may appropriately omit, replace, or add various processes or components. For example, the described method may be performed in an order different from the order described, and various steps may be added, omitted, or combined. In addition, features described in some examples may be combined in other examples.

[0066] Please refer to FIG1 , which shows a schematic diagram of the printing effect of an existing protective layer provided in an embodiment of the present application.

[0067] As shown in Figure 1, the upper schematic diagram can be understood as a side view of the existing protective layer, and the lower schematic diagram can be understood as a top view of the existing protective layer. In these two schematic diagrams, the display panel on the display device may include a display area, an IC (i.e., a screen driver), and metal traces. The metal traces are located between the display area and the IC (one side is completely attached to the display area), and the protective layer used to protect the metal traces is also located between the display area and the IC to cover the upper surface of the metal traces. From the angle of the side view, it can be clearly seen that the existing protective layer coating method is to directly coat the protective layer material on the upper surface of the metal traces. Due to its fluidity (low viscosity), the protective layer material will climb a certain distance (which can also be understood as diffusion movement), and thus cannot guarantee the thickness consistency of the protective layer on the upper surface of the metal traces, and will also cause excessive waste of protective layer. In addition, from the perspective of looking down at the rendering, it can be seen that the shape of the boundary of the protective layer material is uncontrolled during the climbing process, which means that the regularity of the shape of the protective layer on the upper surface of the metal trace cannot be guaranteed, which not only greatly reduces the protection effect, but also affects the user's visual experience under high requirements.

[0068] In order to solve the technical defects existing in the above-mentioned prior art, this application proposes one or more of the following embodiments for explanation.

[0069] Please refer to FIG. 2 , which shows an overall flow chart of a method for printing a protective layer of a display device provided in an embodiment of the present application.

[0070] As shown in FIG2 , the method for printing a protective layer of the display device may include at least the following steps:

[0071] Step 202: Identify the boundary area of ​​the metal traces on the display panel, and determine the printing parameters of the retaining wall layer based on the boundary area of ​​the metal traces and the preset thickness parameters.

[0072] In an embodiment of the present application, the protective layer printing method of the display device can be, but is not limited to, applied to a control terminal on a controllable motion platform, which control platform may at least include a marble suction cup (controllable rotation) for fixing the substrate of the display device, a top camera arranged above the marble suction cup, a gantry for controlling the first printing valve, a gantry for controlling the second printing valve, and a laser ranging sensor for measuring the height of the printing valve and the height of the display panel. Among them, the first printing valve can be used to print a retaining wall layer on the surface of the substrate of the display device, and the position of the retaining wall layer can be on the boundary line of the metal trace. The type of the first printing valve can be but is not limited to a pneumatic dispensing valve, a piezoelectric jet valve or a 3D direct writing printing valve; the second printing valve can be used to print a protective layer on the surface of the substrate of the display device after printing the retaining wall layer. The position of the protective layer can be between the display area of ​​the display panel and the retaining wall layer, so as to achieve complete coverage of the upper surface of the metal trace in combination with the retaining wall layer. The type of the second printing valve can be but is not limited to a pneumatic dispensing valve, a piezoelectric jet valve, a 3D direct writing printing valve or an inkjet printing valve, and the type of the second printing valve can be determined according to the thickness of the protective layer required by the user.

[0073] It can be understood that in the embodiment of the present application, the gantry for controlling the first printing valve and the gantry for controlling the second printing valve can be the same gantry, that is, the first printing valve can be controlled by the same gantry to print the retaining wall layer first, and after the retaining wall layer is printed, the second printing valve can be controlled to print the protective layer. In the process of controlling the first printing valve, the second printing valve is in a non-working state, and in the process of controlling the second printing valve, the first printing valve is in a non-working state. Reference can be made to FIG3 for the overall flow chart of a method for printing a protective layer of a display device provided in the embodiment of the present application. As shown in FIG3, the substrate of the display device can be adsorbed on a suction cup, and the gantry arranged above the suction cup can respectively control the printing valve for printing the retaining wall layer and the printing valve for printing the protective layer. Here, the type of the printing valve for printing the retaining wall layer is inconsistent with the type of the printing valve for printing the protective layer, and the printing valve for printing the retaining wall layer is in the printing area of ​​the retaining wall layer, and the printing valve for printing the protective layer is in the printing area of ​​the protective layer.

[0074] It should be noted that the material poured into the syringe corresponding to the first printing valve is the retaining wall layer material, and the material poured into the syringe corresponding to the second printing valve is the protective layer filling material. In the embodiment of the present application, the protective layer filling material and the retaining wall layer material are miscible materials. As an option, the retaining wall layer material can be mixed and formulated by mixing the protective layer filling material with a small amount of thixotropic agent, or can be mixed and formulated by mixing the protective layer filling material with a small amount of thickener, so as to increase the shape retention without changing the mechanical properties of the material and without destroying the microstructure of the protective layer, so as to combine with the protective layer filling material to cover the upper surface of the metal trace.

[0075] Here, the display device mentioned in the embodiments of the present application may include but is not limited to a mobile terminal with a display panel such as a mobile phone, a display screen or a laptop computer, and is not limited thereto.

[0076] Specifically, when printing a protective layer on the metal traces of the display panel, the display panel can be, but is not limited to, first adsorbed on the suction cup, and the boundary area of ​​the metal traces on the display panel can be identified by a top camera or other shooting equipment, wherein the boundary area of ​​the metal traces can be understood as a rectangular area containing the entire metal trace, that is, the metal trace is completely within the rectangular area, and one boundary line of the rectangular area can be, but is not limited to, completely overlapping with the edge line of the display area, and the other two symmetrical boundary lines can be, but are not limited to, on the edge lines of the display panel, so as to facilitate the printing of the retaining wall layer and the protective layer. It can be understood that the method of identifying the boundary area of ​​the metal traces on the display panel can be a conventional image recognition technology, which is a conventional technical means in this field and will not be elaborated here. Of course, in the embodiment of the present application, the boundary area of ​​the metal traces on the display panel can also be identified by other methods such as manual methods, which is not limited to this.

[0077] Furthermore, after identifying the boundary area of ​​the metal trace, the print area of ​​the retaining wall layer can be first determined based on the boundary area of ​​the metal trace. An initial print position is determined based on the print area of ​​the retaining wall layer. The print path of the retaining wall layer is then determined based on the preset thickness parameters, thereby obtaining the print parameters of the retaining wall layer. Here, the preset thickness parameter can be understood as the thickness of the protective layer used to cover the metal trace to meet user needs. Since the protective layer filling material and the retaining wall layer material are miscible, the print thickness of the retaining wall layer is consistent with the print thickness of the protective layer.

[0078] As an option in the embodiment of the present application, before determining the printing parameters of the retaining wall layer based on the boundary area of ​​the metal trace and the preset thickness parameters, the method further includes:

[0079] Fixing the bottom of the display panel on the suction cup, and identifying at least two marking points on the substrate surface of the display panel based on the top camera;

[0080] Determine whether a line formed by any two adjacent marking points is parallel to a calibration line; wherein the calibration line corresponds to the movement direction of the first printing valve;

[0081] When it is detected that the connecting line is not parallel to the calibration line, the suction cup is rotated based on the angle between the connecting line and the calibration line until the connecting line is parallel to the calibration line;

[0082] When it is detected that the connecting line is parallel to the calibration line, the position of each marking point in the preset spatial rectangular coordinate system is determined;

[0083] The printing parameters of the retaining wall layer are determined based on the boundary area of ​​the metal trace and the preset thickness parameters, including:

[0084] The printing parameters of the retaining wall layer are determined based on the boundary area of ​​the metal trace, the preset thickness parameters, and the position of each marking point.

[0085] To ensure the printing quality and accuracy of the retaining wall layer, the angle between the line formed by any two adjacent marking points on the display panel's substrate surface and the calibration line can be used to determine whether the display panel needs to be rotated on the suction cup. This ensures that during the printing of the retaining wall layer, the first print valve's horizontal movement along the plane remains parallel to the direction of the long side of the display panel, and its vertical movement along the plane remains parallel to the direction of the wide side of the display panel. The calibration line can be a line segment parallel to the horizontal movement direction of the plane, as well as a line segment parallel to the vertical movement direction of the plane, and the line segment parallel to the horizontal movement direction of the plane and the line segment parallel to the vertical movement direction of the plane are perpendicular to each other.

[0086] Specifically, the bottom of the substrate of the display panel can be first adsorbed on the suction cup, and the top camera can be controlled to move to the top of the substrate of the display panel to capture the upper surface of the substrate of the display panel, and at least two marking points on the substrate surface of the display panel can be identified in the captured image through a visual algorithm. It can be understood that in the embodiment of the present application, at least two marking points are pre-set on the substrate surface of the display panel, and the position of each marking point on the substrate surface of the display panel is relatively fixed. For example, a marking point can be set at each of the four vertices of the substrate surface of the display panel, and the line connecting any two adjacent marking points can remain parallel to the long side or wide side of the substrate of the display panel.

[0087] Then, after identifying all the marking points on the substrate surface of the display panel, any two adjacent marking points can be connected by a line, and it can be determined whether the angle between the connecting line and any calibration line is 0 degrees. Possibly, when it is detected that the angle between the connecting line and any calibration line is 0 degrees, it indicates that the connecting line formed by any two adjacent marking points is parallel to any calibration line, and then the position coordinates of each marking point in the preset spatial rectangular coordinate system can be determined in combination with the preset spatial rectangular coordinate system. Among them, the preset spatial rectangular coordinate system can be established based on, but not limited to, the plane where the motion platform is located. For example, but not limited to, the center of the suction cup or any vertex is used as the origin of the coordinate system to establish the corresponding spatial rectangular coordinate system, which is not limited here.

[0088] It is possible that when it is detected that the angle between the connecting line and any calibration line is not 0 degrees, it indicates that the connecting line formed by any two adjacent marking points is not parallel to any calibration line. The suction cup can be controlled to rotate according to the angle between the connecting line and any calibration line until the angle between the connecting line and any calibration line is 0 degrees, and then the position coordinates of each marking point in the preset spatial rectangular coordinate system can be determined in combination with the preset spatial rectangular coordinate system.

[0089] Then, after obtaining the position of each marking point, the printing parameters of the retaining wall layer can be determined according to the boundary area of ​​the metal trace, the preset thickness parameters and the position of each marking point. Here, the printing parameters of the retaining wall layer may include, but are not limited to, the printing path and the initial printing position of the retaining wall layer. In other words, after determining the printing parameters of the retaining wall layer, the first printing valve can be controlled to move to the initial printing position first, and the printing process of the retaining wall layer can be performed along the printing path. Since the position of each marking point on the substrate surface of the display panel and the boundary area of ​​the metal trace are relatively fixed, after determining the position of each marking point in the preset spatial rectangular coordinate system, the position of any point in the boundary area of ​​the metal trace in the preset spatial rectangular coordinate system can be converted according to the position relationship between the position of any marking point and the position of any point in the boundary area of ​​the metal trace on the substrate of the display panel.

[0090] As another optional embodiment of the present application, the printing parameters of the retaining wall layer are determined based on the boundary area of ​​the metal trace, the preset thickness parameter, and the position of each marking point, including:

[0091] Based on the position of each marker point, determine the vertex position farthest from the display area in the boundary area of ​​the metal trace, and use the vertex position as the initial printing position of the retaining wall layer;

[0092] Determine the printing path of the retaining wall layer according to the boundary line farthest from the display area in the boundary area of ​​the metal routing and the preset thickness parameter;

[0093] The initial printing position of the retaining wall layer and the printing path of the retaining wall layer are used as the printing parameters of the retaining wall layer.

[0094] Specifically, in the process of determining the printing parameters of the retaining wall layer, since the retaining wall layer needs to be set on the side of the metal trace farthest from the display area to effectively maintain the thickness consistency and shape regularity of the protective layer, the boundary line farthest from the display area can be first determined in the boundary area of ​​the metal trace, and in order to improve printing efficiency, any vertex of the boundary line can be used as the initial printing position of the retaining wall layer, but is not limited to it. Here, since the position of any marking point and any point in the boundary area of ​​the metal trace have a relatively fixed positional relationship on the substrate of the display panel, the position coordinates of any vertex of the boundary line can be converted based on the position coordinates of any marking point and the fixed positional relationship between the marking point and any vertex of the boundary line, so that the first printing valve can be moved to directly above the vertex according to the position coordinates.

[0095] It should be noted that in the embodiment of the present application, the initial printing position of the retaining wall layer can also be set in the area between the boundary line of the metal trace and the IC (screen driver), that is, the retaining wall layer is not limited to printing on the boundary line of the metal trace. For example, it can be printed on a path within a preset range from the boundary line of the metal trace. Here, the length of the path is consistent with the boundary line of the metal trace, and the path is parallel to the boundary line of the metal trace.

[0096] Next, to effectively control the material cost of the protective layer, the boundary line farthest from the display area within the boundary region of the metal trace can be directly used as the bottom movement path of the retaining wall layer. Specifically, the path corresponding to movement from one vertex of the boundary line to another vertex can be used as the bottom printing path of the first print valve. Based on preset thickness parameters and the printing volume of the first print valve per unit time (also understood as the amount of glue output), the thickness printing path of the first print valve moving back and forth along the boundary line from one vertex to another can be determined. This ensures that the thickness of the retaining wall layer printed by the first print valve remains consistent with the preset thickness parameters after curing. As the first print valve moves along the printing path, the printing volume corresponding to each printing position can be controlled to remain consistent, ensuring a consistent thickness for the retaining wall layer.

[0097] Reference is made to FIG4 , which illustrates a schematic diagram of the printing effect of a retaining wall layer provided in an embodiment of the present application. As shown in FIG4 , the retaining wall layer is located on the side of the metal traces farthest from the display area, and can be, but is not limited to, printed by a first printing valve of the 3D direct-write printing valve type. The space between the retaining wall layer and the display area serves as the printing area for the protective layer. It is understood that due to the low viscosity of the retaining wall layer material and the influence of gravity, the bottom cross-sectional length of the retaining wall layer is greater than the top cross-sectional length, meaning that the side-view structure of the retaining wall layer in FIG4 approximates a trapezoid.

[0098] Step 204 : Determine printing parameters of the protection layer according to the protection area between the boundary area of ​​the metal traces and the display area on the display panel and the preset thickness parameters.

[0099] Specifically, in order to further effectively control the material input cost of the protective layer and ensure the printing effect of the protective layer, the boundary line closest to the display area can be first determined in the boundary area of ​​the metal trace. It can be understood that since one side of the metal trace is attached to the display area, the boundary line is also the boundary line of the display area, and any vertex on the boundary line can be used as the initial printing position of the protective layer. Here, since the position of any marking point and any point in the boundary area of ​​the metal trace have a relatively fixed positional relationship on the substrate of the display panel, the position coordinates of any vertex of the boundary line can be converted based on the position coordinates of any marking point and the fixed positional relationship between the marking point and any vertex of the boundary line, so that the second printing valve can be moved to directly above the vertex according to the position coordinates.

[0100] Furthermore, the bottom printing area of ​​the protective layer can be determined based on the boundary area of ​​the metal traces on the display panel and the protective area between the display area, so as to determine the bottom printing path based on the bottom printing area. Furthermore, the thickness printing path of the second printing valve moving back and forth along the bottom printing path can be obtained based on the preset thickness parameters and the printing volume (also understood as the glue output) of the second printing valve per unit time. The bottom printing area can be the product of the length and width corresponding to the protective area. However, since in the actual process, part of the retaining wall layer covers the upper surface of the metal traces (i.e., covers part of the protective area) when printing the retaining wall layer, as a preferred method, the bottom printing area can also be the product of the length and width of the metal traces corresponding to the protective area, and the difference between half the bottom area of ​​the retaining wall layer. Since the retaining wall layer material is miscible with the protective layer material, this is not limited to this.

[0101] It is understood that after determining the bottom surface printing area, the bottom surface printing path corresponding to the second print valve printing the bottom surface of the protective layer can be determined based on the second print valve's printing volume per unit time, the area formed by the printing volume in the protective area, and the bottom surface printing area. Furthermore, as the second print valve moves along the printing path, the printing volume corresponding to each printing position can be controlled to remain consistent, thereby ensuring a consistent thickness of the protective layer.

[0102] Please refer to Figure 5 for a schematic diagram of the printing effect of a protective layer provided in an embodiment of the present application. As shown in Figure 5, the printing area of ​​the protective layer is between the retaining wall layer and the display area, and can be but is not limited to being printed by a second printing valve of the piezoelectric jet valve type.

[0103] Step 206: Prepare a retaining wall layer material based on the preset protective layer material, control the first printing valve to perform printing based on the printing parameters of the retaining wall layer and the retaining wall layer material, and control the second printing valve to perform printing based on the printing parameters of the protective layer and the preset protective layer material; wherein the preset protective layer material is miscible with the retaining wall layer material.

[0104] Specifically, after determining the printing parameters of the retaining wall layer and the printing parameters of the protective layer, in order to further ensure the shape retention of the retaining wall layer and the protective layer, the corresponding retaining wall material can be prepared according to the preset protective layer material. Among them, the retaining wall material can be, but is not limited to, mixing the preset protective layer material and the thixotropic agent according to a preset volume ratio to enhance the thixotropy of the retaining wall layer by mixing the thixotropic agent, or mixing the preset protective layer material and the thickener according to a preset volume ratio to enhance the viscosity of the retaining wall layer by mixing the thickener, or mixing the preset protective layer material and the solvent according to a preset volume ratio to enhance the mutual solubility between the retaining wall layer and the protective layer material by mixing the solvent. Of course, any at least two of the above-mentioned thixotropic agent, thickener and solvent can also be mixed with the preset protective layer material, without limitation thereto.

[0105] It is understandable that the preset protective layer material may be, but is not limited to, a low-viscosity UV curing material or a film material, and the preset volume ratio may be, but is not limited to, a ratio of 9:1 between the protective layer material and the mixture.

[0106] Furthermore, after the retaining wall layer material is prepared, the retaining wall layer material can be poured into the syringe corresponding to the first printing valve, and the protective layer material can be poured into the syringe corresponding to the second printing valve, and the syringes can be connected to the corresponding pneumatic dispensing machines respectively to facilitate the printing process of the first printing valve and the second printing valve.

[0107] Furthermore, the first printing valve can be controlled to move to the corresponding initial printing position based on the printing parameters of the retaining wall layer, and the printing process can be performed according to the corresponding printing path until the retaining wall layer is printed. After the retaining wall layer is printed, the second printing valve can be controlled to move to the corresponding initial printing position based on the printing parameters of the protective layer, and the printing process can be performed according to the corresponding printing path until the protective layer is printed.

[0108] Please refer to Figure 6 for a schematic diagram of the effect of an integral protective layer provided in an embodiment of the present application. As shown in Figure 6, there is a protective layer between the retaining wall layer and the display area. The thickness of the protective layer is consistent with the thickness of the retaining wall layer and the thickness of the display area. In combination with Figure 4, it can be seen that since the protective layer material and the retaining wall layer material are miscible, the contact part of the protective layer and the retaining wall layer has been fused with each other, and the fused part is closer to the protective layer from a visual effect, that is, Figure 6 shows half of the retaining wall layer structure corresponding to Figure 4.

[0109] It should be noted that, precisely because the protective layer material and the retaining wall layer material are compatible, and the retaining wall layer can better ensure the thickness consistency and shape regularity of the protective layer, in the embodiment of the present application, the protective layer and the retaining wall layer are regarded as the entire protective layer, and there is no need to clean the retaining wall layer.

[0110] Please also refer to Figure 7, which is a schematic diagram of the effect of another overall protective layer provided in an embodiment of the present application. As shown in Figure 7, the upper half of the schematic diagram can be understood as a side view effect diagram of the overall protective layer, and the lower half of the schematic diagram can be understood as a top view effect diagram of the overall protective layer. It can be seen from these two effect schematic diagrams that the entire protective layer can effectively ensure the consistency of thickness and regularity of shape compared to the existing protective layer.

[0111] It can be understood that in the embodiment of the present application, through the above-mentioned printing method, efficient and stable printing of a metal circuit protection layer with a thickness of 10μm-500μm can be achieved. On the one hand, the climbing width of the metal circuit protection layer can be reduced to 100μm to reduce the climbing width. On the other hand, the metal circuit boundary morphology accuracy can be within ±20μm and the height uniformity can be within ±10μm to increase the morphology accuracy. Not only can the display product border be reduced by 100-500μm, but the product competitiveness can also be significantly improved.

[0112] As another optional embodiment of the present application, before controlling the first printing valve to perform printing based on the printing parameters of the retaining wall layer and the retaining wall layer material, the method further includes:

[0113] Controlling the laser sensor to scan the substrate surface of the display panel to obtain the height of the substrate surface of the display panel;

[0114] Measuring the current height of the first printing valve and obtaining the target height based on the difference between the current height, the substrate surface height, and the preset printing height;

[0115] The first printing valve is controlled to move vertically downward based on the target height, so that the height between the first printing valve and the substrate surface of the display panel is a preset printing height.

[0116] To achieve a better printing effect for the first print valve, before controlling the first print valve to print according to the printing parameters of the retaining wall layer, the laser ranging sensor can be controlled to scan the substrate surface of the display panel to obtain the substrate surface height of the display panel, where the substrate surface height of the display panel can be understood as the distance between the substrate surface of the display panel and a horizontal plane. The current height of the first print valve can also be obtained, where the current height of the first print valve can be understood as the distance between the print head of the first print valve and a horizontal plane. The target height can then be obtained by calculating the difference between the current height of the first print valve, the substrate surface height of the display panel, and a preset printing height. The preset printing height can be understood as the distance between the dispensing head of the first print valve and the substrate surface of the display panel under ideal conditions.

[0117] Then, after the target height is determined, the first print valve can be controlled to move vertically downward by a distance equal to the target height, so that the height between the first print valve and the substrate surface of the display panel is the preset printing height. Of course, before controlling the second print valve to print according to the printing parameters of the retaining wall layer, the second print valve can also be controlled to move vertically downward by a distance equal to the target height, so that the height between the second print valve and the substrate surface of the display panel is the preset printing height.

[0118] As another optional embodiment of the present application, before controlling the second printing valve to perform printing based on the printing parameters of the protective layer and the preset protective layer material, the method further includes:

[0119] When it is detected that the preset thickness parameter is in a preset first thickness range, determining that the type of the second printing valve is a piezoelectric printing valve;

[0120] When it is detected that the preset thickness parameter is in a preset second thickness range, determining that the type of the second printing valve is an inkjet printing valve; or

[0121] When it is detected that the preset thickness parameter is in a preset second thickness range, the type of the second printing valve is determined to be a direct writing printing valve; wherein the preset first thickness range is smaller than the preset second thickness range.

[0122] To effectively improve printing efficiency and quality, the type of the second print valve can also be determined based on a preset thickness parameter. Specifically, when the preset thickness parameter is detected to be within a preset first thickness range, it indicates that the corresponding volume of the protective layer is relatively small, and the type of the second print valve can be determined to be a piezoelectric print valve. When the preset thickness parameter is detected to be within a preset second thickness range, it indicates that the corresponding volume of the protective layer is relatively large, and the type of the second print valve can be determined to be an inkjet print valve or a direct write print valve, thereby meeting different printing requirements.

[0123] It is understandable that in the embodiment of the present application, the corresponding second printing valve type can also be determined according to the preset printing parameters such as the printing speed to further meet different printing requirements.

[0124] As another optional embodiment of the present application, before controlling the first printing valve to perform printing based on the printing parameters of the retaining wall layer and the retaining wall layer material, the method further includes:

[0125] Acquiring a substrate surface image of a display panel;

[0126] When impurities are identified on the substrate surface in the substrate surface image, the substrate surface of the display panel is subjected to a solvent wiping process; or

[0127] When impurities are identified on the substrate surface in the substrate surface image, an air knife blowing treatment is performed on the substrate surface of the display panel.

[0128] In order to prevent the surface impurities of the display panel from affecting the printing effect of the protective layer, the surface image of the substrate of the display panel can also be identified and processed by a visual algorithm. When impurities are detected on the surface of the display panel, the surface of the substrate of the display panel can be, but is not limited to, wiped with a solvent or blown with an air knife to remove the surface impurities of the display panel.

[0129] As another optional embodiment of the present application, after controlling the first printing valve to perform printing based on the printing parameters and the material of the retaining wall layer, and before controlling the second printing valve to perform printing based on the printing parameters and the preset material of the protective layer, the method further includes:

[0130] The retaining wall layer on the surface of the substrate is cured.

[0131] In order to ensure that the protective layer can present a better effect, after the printing process of the retaining wall layer is completed, the retaining wall layer can be cured by a UV lamp or an IR lamp to effectively fix the shape of the retaining wall layer.

[0132] As another optional embodiment of the present application, after the retaining wall layer on the surface of the substrate is cured, and before the second printing valve is controlled to perform printing based on the printing parameters of the protective layer and the preset protective layer material, the method further includes:

[0133] The retaining wall layer on the surface of the substrate is surface treated.

[0134] In order to enhance the solubility of the surface of the retaining wall layer so that the retaining wall layer can be better soluble in the protective layer, the surface of the retaining wall layer can be treated by a plasma device after the printing process of the retaining wall layer is completed to introduce groups on the surface of the retaining wall layer.

[0135] Please refer to FIG8 , which shows a schematic structural diagram of a protective layer printing device for a display device provided in an embodiment of the present application.

[0136] As shown in FIG8 , the protective layer printing apparatus of the display device may include at least a first determining module 801, a second determining module 802, and a printing processing module 803, wherein:

[0137] A first determining module 801 is configured to identify a boundary area of ​​a metal trace on a display panel, and determine printing parameters of a retaining wall layer based on the boundary area of ​​the metal trace and a preset thickness parameter;

[0138] A second determining module 802 is configured to determine printing parameters of the protective layer according to a protective area between a boundary area of ​​the metal traces on the display panel and the display area, and a preset thickness parameter;

[0139] The printing processing module 803 is used to prepare the retaining wall layer material based on the preset protective layer material, and control the first printing valve to perform printing processing based on the printing parameters of the retaining wall layer and the retaining wall layer material, and control the second printing valve to perform printing processing based on the printing parameters of the protective layer and the preset protective layer material; wherein the preset protective layer material is miscible with the retaining wall layer material.

[0140] In some possible embodiments, before determining the printing parameters of the retaining wall layer based on the boundary area of ​​the metal trace and the preset thickness parameters, the method further includes:

[0141] Fixing the bottom of the display panel on the suction cup, and identifying at least two marking points on the substrate surface of the display panel based on the top camera;

[0142] Determine whether a line formed by any two adjacent marking points is parallel to a calibration line; wherein the calibration line corresponds to the movement direction of the first printing valve;

[0143] When it is detected that the connecting line is not parallel to the calibration line, the suction cup is rotated based on the angle between the connecting line and the calibration line until the connecting line is parallel to the calibration line;

[0144] When it is detected that the connecting line is parallel to the calibration line, the position of each marking point in the preset spatial rectangular coordinate system is determined;

[0145] The printing parameters of the retaining wall layer are determined based on the boundary area of ​​the metal trace and the preset thickness parameters, including:

[0146] The printing parameters of the retaining wall layer are determined based on the boundary area of ​​the metal trace, the preset thickness parameters, and the position of each marking point.

[0147] In some possible embodiments, determining the printing parameters of the retaining wall layer based on the boundary area of ​​the metal trace, the preset thickness parameter, and the position of each marking point includes:

[0148] Based on the position of each marker point, determine the vertex position farthest from the display area in the boundary area of ​​the metal trace, and use the vertex position as the initial printing position of the retaining wall layer;

[0149] Determine the printing path of the retaining wall layer according to the boundary line farthest from the display area in the boundary area of ​​the metal routing and the preset thickness parameter;

[0150] The initial printing position of the retaining wall layer and the printing path of the retaining wall layer are used as the printing parameters of the retaining wall layer.

[0151] In some possible embodiments, determining the printing parameters of the protective layer based on the protective area between the boundary area of ​​the metal traces on the display panel and the display area, and a preset thickness parameter, includes:

[0152] Based on the position of each marking point, determine the vertex position closest to the display area in the protection area, and use the vertex position as the initial printing position of the protection layer;

[0153] Determining the bottom surface area of ​​the protective layer according to the length and width of the metal trace corresponding to the protection area, and determining the printing path of the protective layer based on the bottom surface area of ​​the protective layer and a preset thickness parameter;

[0154] The initial printing position of the protective layer and the printing path of the protective layer are used as printing parameters of the protective layer.

[0155] In some possible embodiments, the retaining wall layer material is prepared based on the preset protective layer material, including:

[0156] Mixing the preset protective layer material and the thixotropic agent according to a preset volume ratio to prepare the retaining wall layer material; or

[0157] The preset protective layer material and thickener are mixed according to a preset volume ratio to prepare the retaining wall layer material.

[0158] In some possible embodiments, before controlling the first printing valve to perform a printing process based on the printing parameters of the retaining wall layer and the retaining wall layer material, the method further includes:

[0159] Controlling the laser sensor to scan the substrate surface of the display panel to obtain the height of the substrate surface of the display panel;

[0160] Measuring the current height of the first printing valve and obtaining the target height based on the difference between the current height, the substrate surface height, and the preset printing height;

[0161] The first printing valve is controlled to move vertically downward based on the target height, so that the height between the first printing valve and the substrate surface of the display panel is a preset printing height.

[0162] In some possible embodiments, before controlling the second printing valve to perform printing based on the printing parameters of the protective layer and the preset protective layer material, the method further includes:

[0163] When it is detected that the preset thickness parameter is in a preset first thickness range, determining that the type of the second printing valve is a piezoelectric printing valve;

[0164] When it is detected that the preset thickness parameter is in a preset second thickness range, determining that the type of the second printing valve is an inkjet printing valve; or

[0165] When it is detected that the preset thickness parameter is in a preset second thickness range, the type of the second printing valve is determined to be a direct writing printing valve; wherein the preset first thickness range is smaller than the preset second thickness range.

[0166] In some possible embodiments, before controlling the first printing valve to perform a printing process based on the printing parameters of the retaining wall layer and the retaining wall layer material, the method further includes:

[0167] Acquiring a substrate surface image of a display panel;

[0168] When impurities are identified on the substrate surface in the substrate surface image, the substrate surface of the display panel is subjected to a solvent wiping process; or

[0169] When impurities are identified on the substrate surface in the substrate surface image, an air knife blowing treatment is performed on the substrate surface of the display panel.

[0170] In some possible embodiments, after controlling the first printing valve to perform printing based on the printing parameters and material of the retaining wall layer, and before controlling the second printing valve to perform printing based on the printing parameters and material of the protective layer, the process further includes:

[0171] The retaining wall layer on the surface of the substrate is cured.

[0172] In some possible embodiments, after the retaining wall layer on the surface of the substrate is cured and before the second printing valve is controlled to perform printing based on the printing parameters of the protective layer and the preset protective layer material, the process further includes:

[0173] The retaining wall layer on the surface of the substrate is surface treated.

[0174] Those skilled in the art will clearly understand that the technical solutions of the embodiments of the present application can be implemented with the help of software and / or hardware. "Unit" and "module" in this specification refer to software and / or hardware that can independently perform or cooperate with other components to perform specific functions, where the hardware can be, for example, a field-programmable gate array (FPGA) or an integrated circuit (IC).

[0175] Please refer to FIG. 9 , which shows a schematic structural diagram of a protective layer printing device for another display device provided in an embodiment of the present application.

[0176] As shown in FIG. 9 , the protection layer printing apparatus 900 of the display device may include: at least one processor 901 , at least one network interface 904 , a user interface 903 , a memory 905 , and at least one communication bus 902 .

[0177] The communication bus 902 may be used to implement connection and communication among the above components.

[0178] The user interface 903 may include buttons, and the optional user interface may also include a standard wired interface or a wireless interface.

[0179] The network interface 904 may include, but is not limited to, a Bluetooth module, an NFC module, a Wi-Fi module, and the like.

[0180] Among them, the processor 901 may include one or more processing cores. The processor 901 uses various interfaces and lines to connect the various parts within the protective layer printing device 900 of the display device, and executes various functions and processes data of the protective layer printing device 900 of the routing display device by running or executing instructions, programs, code sets or instruction sets stored in the memory 905, and calling data stored in the memory 905. Optionally, the processor 901 can be implemented in at least one hardware form of DSP, FPGA, and PLA. The processor 901 can integrate one or a combination of CPU, GPU, and modem. Among them, the CPU mainly processes the operating system, user interface, and application programs; the GPU is responsible for rendering and drawing the content to be displayed on the display screen; and the modem is used to handle wireless communications. It is understandable that the above-mentioned modem may not be integrated into the processor 901, but may be implemented separately through a chip.

[0181] The memory 905 may include either RAM or ROM. Optionally, the memory 905 may include a non-transitory computer-readable medium. The memory 905 may be used to store instructions, programs, codes, code sets, or instruction sets. The memory 905 may include a program storage area and a data storage area. The program storage area may store instructions for implementing an operating system, instructions for at least one function (such as a touch function, a sound playback function, an image playback function, etc.), instructions for implementing the above-mentioned method embodiments, etc.; the data storage area may store data involved in the above-mentioned method embodiments, etc. The memory 905 may also optionally be at least one storage device located remotely from the aforementioned processor 901. As shown in Figure 9, the memory 905, as a computer storage medium, may include an operating system, a network communication module, a user interface module, and a protective layer printing application for a display device.

[0182] Specifically, the processor 901 may be configured to call a protection layer printing application for the display device stored in the memory 905 and perform the following operations:

[0183] Identifying a boundary area of ​​the metal trace on the display panel, and determining printing parameters of the retaining wall layer based on the boundary area of ​​the metal trace and a preset thickness parameter;

[0184] Determining printing parameters of the protective layer based on a protective area between a boundary area of ​​the metal traces on the display panel and the display area, and a preset thickness parameter;

[0185] A retaining wall layer material is prepared based on a preset protective layer material, and the first printing valve is controlled to perform printing based on the printing parameters of the retaining wall layer and the retaining wall layer material, and the second printing valve is controlled to perform printing based on the printing parameters of the protective layer and the preset protective layer material; wherein the preset protective layer material is miscible with the retaining wall layer material.

[0186] In some possible embodiments, before determining the printing parameters of the retaining wall layer based on the boundary area of ​​the metal trace and the preset thickness parameters, the method further includes:

[0187] Fixing the bottom of the display panel on the suction cup, and identifying at least two marking points on the substrate surface of the display panel based on the top camera;

[0188] Determine whether a line formed by any two adjacent marking points is parallel to a calibration line; wherein the calibration line corresponds to the movement direction of the first printing valve;

[0189] When it is detected that the connecting line is not parallel to the calibration line, the suction cup is rotated based on the angle between the connecting line and the calibration line until the connecting line is parallel to the calibration line;

[0190] When it is detected that the connecting line is parallel to the calibration line, the position of each marking point in the preset spatial rectangular coordinate system is determined;

[0191] The printing parameters of the retaining wall layer are determined based on the boundary area of ​​the metal trace and the preset thickness parameters, including:

[0192] The printing parameters of the retaining wall layer are determined based on the boundary area of ​​the metal trace, the preset thickness parameters, and the position of each marking point.

[0193] In some possible embodiments, determining the printing parameters of the retaining wall layer based on the boundary area of ​​the metal trace, the preset thickness parameter, and the position of each marking point includes:

[0194] Based on the position of each marker point, determine the vertex position farthest from the display area in the boundary area of ​​the metal trace, and use the vertex position as the initial printing position of the retaining wall layer;

[0195] Determine the printing path of the retaining wall layer according to the boundary line farthest from the display area in the boundary area of ​​the metal routing and the preset thickness parameter;

[0196] The initial printing position of the retaining wall layer and the printing path of the retaining wall layer are used as the printing parameters of the retaining wall layer.

[0197] In some possible embodiments, determining the printing parameters of the protective layer based on the protective area between the boundary area of ​​the metal traces on the display panel and the display area, and a preset thickness parameter, includes:

[0198] Based on the position of each marking point, determine the vertex position closest to the display area in the protection area, and use the vertex position as the initial printing position of the protection layer;

[0199] Determining the bottom surface area of ​​the protective layer according to the length and width of the metal trace corresponding to the protection area, and determining the printing path of the protective layer based on the bottom surface area of ​​the protective layer and a preset thickness parameter;

[0200] The initial printing position of the protective layer and the printing path of the protective layer are used as printing parameters of the protective layer.

[0201] In some possible embodiments, the retaining wall layer material is prepared based on the preset protective layer material, including:

[0202] Mixing the preset protective layer material and the thixotropic agent according to a preset volume ratio to prepare the retaining wall layer material; or

[0203] The preset protective layer material and thickener are mixed according to a preset volume ratio to prepare the retaining wall layer material.

[0204] In some possible embodiments, before controlling the first printing valve to perform a printing process based on the printing parameters of the retaining wall layer and the retaining wall layer material, the method further includes:

[0205] Controlling the laser sensor to scan the substrate surface of the display panel to obtain the height of the substrate surface of the display panel;

[0206] Measuring the current height of the first printing valve and obtaining the target height based on the difference between the current height, the substrate surface height, and the preset printing height;

[0207] The first printing valve is controlled to move vertically downward based on the target height, so that the height between the first printing valve and the substrate surface of the display panel is a preset printing height.

[0208] In some possible embodiments, before controlling the second printing valve to perform printing based on the printing parameters of the protective layer and the preset protective layer material, the method further includes:

[0209] When it is detected that the preset thickness parameter is in a preset first thickness range, determining that the type of the second printing valve is a piezoelectric printing valve;

[0210] When it is detected that the preset thickness parameter is in a preset second thickness range, determining that the type of the second printing valve is an inkjet printing valve; or

[0211] When it is detected that the preset thickness parameter is in a preset second thickness range, the type of the second printing valve is determined to be a direct writing printing valve; wherein the preset first thickness range is smaller than the preset second thickness range.

[0212] In some possible embodiments, before controlling the first printing valve to perform a printing process based on the printing parameters of the retaining wall layer and the retaining wall layer material, the method further includes:

[0213] Acquiring a substrate surface image of a display panel;

[0214] When impurities are identified on the substrate surface in the substrate surface image, the substrate surface of the display panel is subjected to a solvent wiping process; or

[0215] When impurities are identified on the substrate surface in the substrate surface image, an air knife blowing treatment is performed on the substrate surface of the display panel.

[0216] In some possible embodiments, after controlling the first printing valve to perform printing based on the printing parameters and material of the retaining wall layer, and before controlling the second printing valve to perform printing based on the printing parameters and material of the protective layer, the process further includes:

[0217] The retaining wall layer on the surface of the substrate is cured.

[0218] In some possible embodiments, after the retaining wall layer on the surface of the substrate is cured and before the second printing valve is controlled to perform printing based on the printing parameters of the protective layer and the preset protective layer material, the process further includes:

[0219] The retaining wall layer on the surface of the substrate is surface treated.

[0220] The present application also provides a computer-readable storage medium having a computer program stored thereon, which, when executed by a processor, implements the steps of the above method. The computer-readable storage medium may include, but is not limited to, any type of disk, including a floppy disk, an optical disk, a DVD, a CD-ROM, a microdrive, a magneto-optical disk, a ROM, a RAM, an EPROM, an EEPROM, a DRAM, a VRAM, a flash memory device, a magnetic card or an optical card, a nanosystem (including a molecular memory IC), or any type of medium or device suitable for storing instructions and / or data.

[0221] It should be noted that for the aforementioned method embodiments, for the sake of simplicity, they are all expressed as a series of action combinations, but those skilled in the art should be aware that this application is not limited by the order of the actions described, because according to this application, certain steps can be performed in other orders or simultaneously. Secondly, those skilled in the art should also be aware that the embodiments described in the specification are all preferred embodiments, and the actions and modules involved are not necessarily required by this application.

[0222] In the above embodiments, the description of each embodiment has its own focus. For parts that are not described in detail in a certain embodiment, reference can be made to the relevant descriptions of other embodiments.

[0223] In the several embodiments provided in this application, it should be understood that the disclosed devices can be implemented in other ways. For example, the device embodiments described above are merely illustrative. For example, the division of units is only a logical function division. In actual implementation, there may be other division methods, such as multiple units or components can be combined or integrated into another system, or some features can be ignored or not executed. Another point is that the mutual coupling or direct coupling or communication connection shown or discussed can be through some service interface, and the indirect coupling or communication connection of devices or units can be electrical or other forms.

[0224] Units described as separate components may or may not be physically separate, and components shown as units may or may not be physical units, that is, they may be located in one place or distributed across multiple network units. Some or all of these units may be selected to achieve the purpose of this embodiment according to actual needs.

[0225] In addition, the functional units in the various embodiments of the present application may be integrated into a single processing unit, or each unit may exist physically separately, or two or more units may be integrated into a single unit. The aforementioned integrated units may be implemented in the form of hardware or software functional units.

[0226] If the integrated unit is implemented in the form of a software functional unit and sold or used as an independent product, it can be stored in a computer-readable memory. Based on this understanding, the technical solution of the present application, or the part that contributes to the existing technology, or all or part of the technical solution can be embodied in the form of a software product. The computer software product is stored in a memory and includes a number of instructions for enabling a computer device (which can be a personal computer, server, or network device, etc.) to execute all or part of the steps of the various embodiments of the present application. The aforementioned memory includes: U disk, read-only memory (ROM), random access memory (RAM), mobile hard disk, magnetic disk, or optical disk, etc., various media that can store program code.

[0227] Those skilled in the art will appreciate that all or part of the steps in the various methods of the above embodiments can be completed by instructing related hardware through a program. The program can be stored in a computer-readable memory, which may include a flash drive, a read-only memory (ROM), a random access memory (RAM), a magnetic disk, or an optical disk.

[0228] The above are merely exemplary embodiments of the present disclosure and are not intended to limit the scope of the present disclosure. That is, any equivalent changes and modifications made in accordance with the teachings of the present disclosure are still within the scope of the present disclosure. After considering the specification and practicing the disclosure herein, those skilled in the art will easily think of the implementation scheme of the present disclosure. This application is intended to cover any variations, uses or adaptations of the present disclosure, which follow the general principles of the present disclosure and include common knowledge or customary technical means in the art that are not recorded in the present disclosure. The description and examples are to be regarded as exemplary only, and the scope and spirit of the present disclosure are defined by the claims.

Claims

1. A method for printing a protective layer of a display device, characterized in that: include: Identifying a boundary area of ​​a metal wiring on a display panel, and determining printing parameters of a retaining wall layer based on the boundary area of ​​the metal wiring and a preset thickness parameter; Determining printing parameters of the protection layer according to the protection area between the boundary area of ​​the metal wiring and the display area on the display panel and the preset thickness parameter; A retaining wall layer material is prepared based on a preset protective layer material, and a first printing valve is controlled to perform printing based on the printing parameters of the retaining wall layer and the retaining wall layer material, and a second printing valve is controlled to perform printing based on the printing parameters of the protective layer and the preset protective layer material; wherein the preset protective layer material is miscible with the retaining wall layer material.

2. The method according to claim 1, characterized in that Before determining the printing parameters of the retaining wall layer based on the boundary area of ​​the metal wiring and the preset thickness parameters, the method further includes: Fixing the bottom of the display panel on the suction cup, and identifying at least two marking points on the substrate surface of the display panel based on the top camera; Determine whether a line formed by any two adjacent marking points is parallel to a calibration line; wherein the calibration line corresponds to a moving direction of the first printing valve; When it is detected that the connecting line is not parallel to the calibration line, based on the angle between the connecting line and the calibration line, the suction cup is rotated until the connecting line is parallel to the calibration line; When it is detected that the connecting line is parallel to the calibration line, determining the position of each of the marking points in a preset spatial rectangular coordinate system; The step of determining the printing parameters of the retaining wall layer based on the boundary area of ​​the metal wiring and the preset thickness parameters includes: The printing parameters of the retaining wall layer are determined based on the boundary area of ​​the metal routing, the preset thickness parameter and the position of each of the marking points.

3. The method according to claim 2, characterized in that The step of determining the printing parameters of the retaining wall layer based on the boundary area of ​​the metal wiring, the preset thickness parameter and the position of each of the marking points includes: Based on the position of each of the marking points, determine the vertex position farthest from the display area in the boundary area of ​​the metal routing, and use the vertex position as the initial printing position of the retaining wall layer; Determining a printing path of the retaining wall layer according to a boundary line in a boundary area of ​​the metal routing that is farthest from the display area and a preset thickness parameter; The initial printing position of the retaining wall layer and the printing path of the retaining wall layer are used as printing parameters of the retaining wall layer.

4. The method according to claim 2, characterized in that: The step of determining the printing parameters of the protective layer according to the protection area between the boundary area of ​​the metal wiring and the display area on the display panel and the preset thickness parameter includes: Based on the position of each of the marking points, determine the vertex position closest to the display area in the protection area, and use the vertex position as the initial printing position of the protection layer; Determining the bottom surface area of ​​the protection layer according to the length and width of the metal trace corresponding to the protection area, and determining the printing path of the protection layer based on the bottom surface area of ​​the protection layer and the preset thickness parameter; An initial printing position of the protective layer and a printing path of the protective layer are used as printing parameters of the protective layer.

5. The method according to claim 1, characterized in that The method of preparing the retaining wall layer material based on the preset protective layer material includes: Mixing the preset protective layer material and the thixotropic agent according to a preset volume ratio to prepare the retaining wall layer material; or The preset protective layer material and thickener are mixed according to the preset volume ratio to prepare the retaining wall layer material.

6. The method according to claim 2, characterized in that Before controlling the first printing valve to perform printing based on the printing parameters of the retaining wall layer and the retaining wall layer material, the method further includes: Controlling a laser sensor to scan a substrate surface of the display panel to obtain a height of the substrate surface of the display panel; Measuring a current height of the first printing valve, and obtaining a target height according to a difference between the current height and the substrate surface height and a preset printing height; The first printing valve is controlled to move vertically downward based on the target height so that the height between the first printing valve and the substrate surface of the display panel is the preset printing height.

7. The method according to claim 1, characterized in that Before controlling the second printing valve to perform printing based on the printing parameters of the protective layer and the preset protective layer material, the method further includes: When it is detected that the preset thickness parameter is in a preset first thickness interval, determining that the type of the second printing valve is a piezoelectric printing valve; When it is detected that the preset thickness parameter is in a preset second thickness range, determining that the type of the second printing valve is an inkjet printing valve; or When it is detected that the preset thickness parameter is in the preset second thickness interval, it is determined that the type of the second printing valve is a direct writing printing valve; wherein the preset first thickness interval is smaller than the preset second thickness interval.

8. The method according to claim 6, characterized in that Before controlling the first printing valve to perform printing based on the printing parameters of the retaining wall layer and the retaining wall layer material, the method further includes: Acquiring a substrate surface image of the display panel; When impurities are identified on the substrate surface in the substrate surface image, performing a solvent wiping process on the substrate surface of the display panel; or When impurities are identified on the substrate surface in the substrate surface image, an air knife blowing treatment is performed on the substrate surface of the display panel.

9. The method according to claim 1, characterized in that: After controlling the first printing valve to perform printing based on the printing parameters of the retaining wall layer and the retaining wall layer material, and before controlling the second printing valve to perform printing based on the printing parameters of the protective layer and the preset protective layer material, the method further includes: The retaining wall layer on the surface of the substrate is cured.

10. The method according to claim 9, characterized in that After the wall layer on the surface of the substrate is cured, and before the second printing valve is controlled to perform printing based on the printing parameters of the protective layer and the preset protective layer material, the method further includes: The barrier layer on the surface of the substrate is subjected to surface treatment.

11. A protective layer printing device for a display device, characterized in that: include: A first determination module, configured to identify a boundary area of ​​a metal wiring on a display panel, and determine a printing parameter of a retaining wall layer based on the boundary area of ​​the metal wiring and a preset thickness parameter; A second determination module, configured to determine a printing parameter of the protection layer according to a protection area between a boundary area of ​​the metal trace and a display area on the display panel, and the preset thickness parameter; A printing processing module is used to prepare a retaining wall layer material based on a preset protective layer material, and control a first printing valve to perform printing processing based on the printing parameters of the retaining wall layer and the retaining wall layer material, and control a second printing valve to perform printing processing based on the printing parameters of the protective layer and the preset protective layer material; wherein the preset protective layer material is miscible with the retaining wall layer material.

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