A method, system and device for quickly and automatically controlling heat pressing of a folding screen protective film

Abstract

The present invention relates to a method, system and equipment for controlling the rapid and automatic hot pressing of a protective film for a folding screen, and relates to the field of hot pressing of protective films, wherein after the adsorption protective film is aligned with the folding screen, the central hot pressing mechanism is controlled to press the raised protection area of ​​the protective film to contact the raised part of the folding screen at a first temperature and a first pressure; through the side hot pressing mechanism, the contact boundary between the central hot pressing mechanism and the raised protection area is moved toward the side of the protective film at a second temperature and a second pressure to perform film lamination, wherein the first temperature and the second temperature may be the same or different, and the first pressure and the second pressure may be the same or different. The present application solves the technical problems in the prior art that conventional rolling lamination methods for folding screens with irregular corners are prone to generate bubbles, have low alignment accuracy and low efficiency, and achieves the technical effects of improving the attachment accuracy of the protective film for irregular folding screens, reducing the generation of bubbles in raised areas and shortening the lamination time by means of central pressing and side hot pressing lamination.

Description

Technical Field

[0001] The present invention relates to the field of hot pressing of protective films, and in particular to a method, system and equipment for quickly and automatically hot pressing a protective film for a folding screen. Background Art

[0002] With the continuous development of consumer electronic products, electronic devices such as foldable screen mobile phones and tablets are becoming increasingly popular. Unlike conventional flat screens, foldable screens have a folding area, and a convex portion is usually formed near the folding area. In order to protect the foldable screen from scratches, a layer of protective film needs to be attached to its surface. In the prior art, the foldable screen protective film is mostly attached by rolling. For example, Chinese patent CN202311169523.4 discloses a method for attaching a foldable screen protective film, such as Figure 1 As shown, the patent first sets the protective film at an angle to the screen, and then uses a rolling mechanism to gradually roll the protective film. However, the above-mentioned prior art has the following problems when applied to folding screens with irregular corners: First, there is inevitably a gap between the roller and the raised portion during rolling, and bubbles are easily generated on both sides of the raised portion, affecting the quality of the bonding; second, the contours of the folding screen with irregular corners and the protective film are difficult to accurately align, and the bonding accuracy is poor; third, in order to achieve a good bonding effect, the existing process often requires repeated adjustments, the operation is cumbersome, and the efficiency is low. Therefore, in the prior art, the film-sticking method for folding screens with irregular corners has technical problems such as easy generation of bubbles, low alignment accuracy, and low efficiency. Summary of the invention

[0003] The present invention aims to solve the technical problems in the prior art that conventional rolling film lamination for folding screens with irregular corners is prone to bubble generation, low alignment accuracy and low efficiency, and provides a method, system and equipment for rapid and automatic hot pressing control of a folding screen protective film to solve the problems.

[0004] The technical solution of the present invention to solve the above technical problems is as follows:

[0005] In a first aspect, the present invention provides a method for rapid and automatic hot pressing control of a folding screen protective film, comprising: after the adsorption protective film is aligned with the folding screen, controlling the central hot pressing mechanism to press a raised protection area of ​​the protective film to contact the raised portion of the folding screen at a first temperature and a first pressure, wherein the raised protection area and the raised portion have the same shape; then, through the side hot pressing mechanism, moving from the contact boundary between the central hot pressing mechanism and the raised protection area to the side edge of the protective film at a second temperature and a second pressure to perform film lamination, wherein the first temperature and the second temperature may be the same or different, and the first pressure and the second pressure may be the same or different.

[0006] In the second aspect, the present invention provides a fast and automatic hot pressing control system for a folding screen protective film, comprising: a raised area hot pressing module, which is used to control the central hot pressing mechanism to press the raised protection area of ​​the protective film to contact the raised portion of the folding screen according to a first temperature and a first pressure after the adsorbed protective film is aligned with the folding screen, wherein the raised protection area and the raised portion have the same shape; a side moving film pasting module, which is used to then move from the contact boundary between the central hot pressing mechanism and the raised protection area to the side of the protective film according to a second temperature and a second pressure through the side hot pressing mechanism to perform film pasting, wherein the first temperature and the second temperature may be the same or different, and the first pressure and the second pressure may be the same or different.

[0007] In the third aspect, the present application provides a heat pressing device, including: a central heat pressing mechanism, the first end face of the central heat pressing mechanism is in contact with the raised protection area of ​​the protective film, and is used to press the raised protection area of ​​the protective film to contact the raised portion of the folding screen, wherein the raised protection area and the raised portion have the same shape; a side heat pressing mechanism, the side heat pressing mechanism is used to move from the contact boundary between the central heat pressing mechanism and the raised protection area to the side of the protective film according to the second temperature and the second pressure to perform film lamination.

[0008] The beneficial effects of the present invention are:

[0009] By aligning the protective film with the folding screen through adsorption, the positions of the protective film and the folding screen are ensured to be accurately matched, laying the foundation for subsequent hot pressing bonding; the middle hot pressing mechanism in the hot pressing equipment is controlled to press the raised protection area of ​​the protective film to contact the raised part of the folding screen according to the first temperature and the first pressure, wherein the raised protection area is consistent with the shape of the raised part, and the protective film is tightly fitted to the raised part by directional heating and pressurizing the raised part, thereby reducing the generation of bubbles; through the side hot pressing mechanism in the hot pressing equipment, the contact boundary between the middle hot pressing mechanism and the raised protection area is moved to the side of the protective film according to the second temperature and the second pressure for film bonding, wherein the first temperature and the second temperature may be the same or different, and the first pressure and the second pressure may also be the same or different, and the side hot pressing is used to achieve good bonding between the protective film and the non-raised part of the folding screen, while improving the efficiency of film bonding.

[0010] Furthermore, the side heat pressing mechanism includes a first side heat pressing mechanism and a second side heat pressing mechanism; the contact boundary between the middle heat pressing mechanism and the raised protection area includes a first boundary and a second boundary; the first side heat pressing mechanism moves from the first boundary to the first side edge of the protective film, and the second side heat pressing mechanism moves from the second boundary to the second side edge of the protective film, and both of them perform film pasting at the same time, thereby shortening the film pasting time by bidirectional synchronous hot pressing.

[0011] In addition, the contact surface between the central heat pressing mechanism and the raised protection area can adopt a curved surface structure that matches the shape of the protective film to achieve a better fitting effect.

[0012] For folding screens with irregular corners, the shape information of the protective film and the folding screen is obtained, and feature positioning points are extracted for alignment to improve the attachment accuracy. BRIEF DESCRIPTION OF THE DRAWINGS

[0013] Figure 1 It is a structural schematic diagram of a method for applying a folding screen protective film in the prior art;

[0014] Figure 2 A schematic diagram of a process for a method for quickly and automatically controlling heat pressing of a folding screen protective film provided by the present invention;

[0015] Figure 3 A schematic diagram of the structure of the middle hot pressing mechanism provided by the present invention;

[0016] Figure 4 A schematic diagram of the structure of the side heat pressing mechanism provided by the present invention;

[0017] Figure 5 A schematic diagram of the structure of a folding screen protective film rapid automatic heat pressing control system provided by the present invention;

[0018] Figure 6 A schematic structural diagram of a hot pressing device provided by the present invention;

[0019] Figure 7 A schematic diagram of the structure of a computer-readable storage medium provided by the present invention.

[0020] In the accompanying drawings, the components represented by the reference numerals are listed as follows:

[0021] Raised area heat pressing module 11, side moving film sticking module 12, middle heat pressing mechanism 21, side heat pressing mechanism 22, computer readable storage medium 30, computer program 31. DETAILED DESCRIPTION

[0022] The following will be combined with the drawings in the embodiments of the present invention to clearly and completely describe the technical solutions in the embodiments of the present invention. Obviously, the described embodiments are only part of the embodiments of the present invention, not all of the embodiments. Based on the embodiments of the present invention, all other embodiments obtained by those skilled in the art without creative work are within the scope of protection of the present invention.

[0023] In the description of the present invention, the terms "first" and "second" are used for descriptive purposes only and should not be understood as indicating or implying relative importance or implicitly indicating the number of the indicated technical features. Thus, the features defined as "first" and "second" may explicitly or implicitly include one or more of the features. In the description of the present invention, the meaning of "plurality" is two or more, unless otherwise clearly and specifically defined.

[0024] In the description of the present invention, the term "for example" is used to mean "used as an example, illustration or explanation". Any embodiment described as "for example" in the present invention is not necessarily to be construed as being more preferred or advantageous than other embodiments. The following description is given to enable any technician in the field to implement and use the present invention. In the following description, details are listed for the purpose of explanation. It should be understood that a person of ordinary skill in the art can recognize that the present invention can be implemented without using these specific details. In other examples, well-known structures and processes will not be elaborated in detail to avoid obscuring the description of the present invention with unnecessary details. Therefore, the present invention is not intended to be limited to the embodiments shown, but is consistent with the widest scope consistent with the principles and features disclosed in the present invention.

[0025] Embodiment 1:

[0026] like Figure 2 As shown, an embodiment of the present invention provides a method for rapid and automatic hot pressing control of a folding screen protective film, which is applied to a hot pressing device, and the hot pressing device includes a central hot pressing mechanism and a side hot pressing mechanism.

[0027] Specifically, the heat pressing equipment includes a central heat pressing mechanism and a side heat pressing mechanism, which work together to quickly and accurately fit the protective film to the surface of the folding screen.

[0028] The central hot pressing mechanism is set in the center of the hot pressing equipment to heat and pressurize the raised part of the folding screen in a directional manner so that the protective film fits tightly to the raised part. During the attachment process, the central hot pressing mechanism applies heat and pressure so that the protective film on the raised part becomes soft and adheres to the surface of the raised part, reducing the generation of bubbles and improving the bonding quality. Figure 3 As shown, the central hot pressing mechanism adopts a structure that matches the shape of the raised part of the folding screen. For example, the pressure head of the central hot pressing mechanism adopts a curved surface structure that matches the shape of the raised part of the folding screen, and achieves a high degree of fit with the raised part during the hot pressing process, thereby improving the bonding quality; for another example, the pressure head of the central hot pressing mechanism adopts a flat structure, which has a simple structure, low manufacturing and maintenance costs, and can meet the bonding requirements in practical applications; further, in order to improve the bonding effect of the flat pressure head, a layer of elastic material can be provided on its surface so that it can adapt to the shape of the raised part when under pressure.

[0029] The side heat pressing mechanism is arranged on both sides of the middle heat pressing mechanism. After the middle heat pressing is completed, the side heat pressing mechanism applies heat pressing from both sides of the raised part to the edge of the folding screen, so that the protective film and the non-raised part of the folding screen can be quickly attached. Among them, the side heat pressing mechanism can adopt structures such as rollers and sliders, and move linearly along the surface of the folding screen during operation.

[0030] The central heat pressing mechanism solves the problem of precise fitting of the raised parts, while the side heat pressing mechanism is responsible for the quick fitting of the non-raised parts. The two work together to achieve fast and precise attachment of the protective film on the surface of the entire folding screen.

[0031] The method includes:

[0032] S1: After the adsorption protective film is aligned with the folding screen, the central hot pressing mechanism is controlled to press the raised protection area of ​​the protective film to contact the raised portion of the folding screen at a first temperature and a first pressure, wherein the raised protection area matches the shape of the raised portion.

[0033] Specifically, the hot pressing equipment first adsorbs the protective film through the adsorption device, and accurately aligns the protective film with the folding screen to be attached. In the protective film adsorption and alignment operation, the order of adsorption and alignment can be flexibly selected according to the process requirements. For example, the folding screen is first accurately positioned by the positioning device, and then the adsorption device adsorbs the protective film and aligns it with the folding screen; for another example, the folding screen is positioned and the protective film is adsorbed at the same time, and the folding screen and the protective film are respectively sent to two independent and synchronously running positioning devices and adsorption devices to coordinate the alignment, and the operation efficiency is high; for another example, the protective film is first adsorbed and its position information is obtained, and then the positioning device is used to position the folding screen so that the folding screen and the protective film are accurately aligned.

[0034] After the protective film is aligned with the folding screen, the central hot pressing mechanism of the hot pressing equipment starts to work. The shape of the pressure head of the central hot pressing mechanism matches the shape of the raised part of the folding screen. Under the action of controlled pressure, the central hot pressing mechanism presses the raised protection area of ​​the protective film onto the raised surface of the folding screen. At the same time, the central hot pressing mechanism heats the protective film to soften it at the raised part and fit closely to the contour of the raised part to avoid bubbles or wrinkles. The temperature and pressure parameters of the central hot pressing mechanism are preset to a first temperature and a first pressure. Among them, the first temperature is selected according to the material properties of the protective film to achieve the purpose of softening without damaging the protective film; the first pressure is determined according to the structural strength of the folding screen and the thickness of the protective film, which not only meets the requirements of close fitting, but also avoids excessive stress on the folding screen and causing damage.

[0035] Through adsorption alignment and central directional hot pressing, the problems of poor fitting of raised parts and easy generation of bubbles in the prior art are effectively solved, and a good foundation is laid for the execution of subsequent steps.

[0036] S2: Then, the side heat pressing mechanism is used to move from the contact boundary between the middle heat pressing mechanism and the raised protection area to the side edge of the protective film according to the second temperature and the second pressure to perform film lamination, wherein the first temperature and the second temperature may be the same or different, and the first pressure and the second pressure may be the same or different.

[0037] Specifically, after the raised protection area of ​​the protective film pressed by the central heat pressing mechanism contacts the raised part of the folding screen, the side heat pressing mechanism begins to participate in the film laminating process. The side heat pressing mechanisms are located on both sides of the central heat pressing mechanism. After the central heat pressing mechanism completes the heat pressing of the raised protection area, the side heat pressing mechanism starts from the contact boundary between the central heat pressing mechanism and the raised protection area, and moves to the two sides of the protective film to perform heat pressing and laminating on the non-raised area of ​​the protective film. Among them, the side heat pressing mechanism can adopt a variety of structural forms, such as rollers, sliders, airbags, etc., and be equipped with corresponding driving devices and heating devices to achieve mobile heat pressing of the protective film.

[0038] During the movement, the side heat pressing mechanism applies a second temperature and a second pressure to the protective film. The second temperature can be the same as the first temperature, or it can be set to a different value according to the material characteristics of the protective film and the process requirements. For example, when the non-raised area and the raised area of ​​the protective film are made of the same material, the second temperature is consistent with the first temperature; when the non-raised area is made of a different material, the second temperature is adjusted according to the heat pressing requirements of the material to ensure the best fitting effect.

[0039] Similarly, the second pressure may be the same as or different from the first pressure. When the non-convex area of ​​the protective film is relatively flat, the second pressure may be less than the first pressure to avoid excessive pressure on the flat area and damage to the protective film; and when the non-convex area has a certain curved surface, the second pressure may be greater than or equal to the first pressure to ensure good adhesion of the curved area.

[0040] The non-raised area of ​​the protective film is heat-pressed and bonded by a side heat-pressing mechanism, so that the protective film is in full contact and tightly fitted with the surface of the folding screen in the non-raised area, avoiding defects such as bubbles and wrinkles caused by poor bonding, and improving the overall film quality and efficiency.

[0041] Furthermore, the embodiment of the present application also includes:

[0042] Step S210: the side hot pressing mechanism includes a first side hot pressing mechanism and a second side hot pressing mechanism;

[0043] Step S220: The contact boundary between the middle hot pressing mechanism and the raised protection area includes a first boundary and a second boundary;

[0044] Step S230: Using the first side heat pressing mechanism, moving from the first boundary to the first side edge of the protective film at the second temperature and the second pressure to perform film lamination;

[0045] Step S240: simultaneously, the second side heat pressing mechanism is used to move from the second boundary to the second side edge of the protective film at the second temperature and the second pressure to perform film lamination.

[0046] In a preferred embodiment, Figure 4 As shown, the side heat pressing mechanism is designed to include a first side heat pressing mechanism and a second side heat pressing mechanism. The first side heat pressing mechanism is located on one side of the middle heat pressing mechanism and is used to heat press and bond the first side edge of the protective film; the second side heat pressing mechanism is located on the other side of the middle heat pressing mechanism and is used to heat press and bond the second side edge of the protective film. By dividing the side heat pressing mechanism into two independent sub-mechanisms, heat pressing of both sides of the protective film can be achieved simultaneously, further improving the film bonding efficiency.

[0047] The contact boundary between the central heat pressing mechanism and the raised protection area includes a first boundary and a second boundary. The first boundary is the contact boundary between the central heat pressing mechanism and the raised protection area on the side close to the first side heat pressing mechanism, and the second boundary is the contact boundary between the central heat pressing mechanism and the raised protection area on the side close to the second side heat pressing mechanism. These two boundaries are the starting points for the first side heat pressing mechanism and the second side heat pressing mechanism to start lateral heat pressing bonding.

[0048] Subsequently, the first side heat pressing mechanism starts from the first boundary, moves toward the first side of the protective film at the second temperature and the second pressure, and performs heat pressing and laminating on the first side. At the same time, the second side heat pressing mechanism starts from the second boundary, moves toward the second side of the protective film at the same second temperature and the second pressure as the first side heat pressing mechanism, and performs heat pressing and laminating on the second side. Compared with the traditional one-way step-by-step laminating method, the bidirectional synchronous heat pressing and laminating method shortens the time of the entire side laminating process by half, thereby improving the laminating efficiency.

[0049] The first side heat pressing mechanism and the second side heat pressing mechanism can be completely the same in structure and process parameter settings to achieve symmetrical bidirectional heat pressing. However, under different working conditions of the screens on both sides, the two side heat pressing mechanisms can be designed differently according to actual needs, such as using different heating temperatures, pressures or movement speeds, etc., to meet the lamination requirements of different areas.

[0050] The solution of synchronous lamination by double-sided hot pressing mechanism further optimizes the efficiency and quality of side lamination, thereby improving the speed and yield rate of the entire lamination process.

[0051] Furthermore, the contact surface shape of the middle hot pressing mechanism matches that of the raised protection area.

[0052] In a preferred embodiment, the shapes of the contact surfaces of the middle hot pressing mechanism and the raised protection area match. The shape matching means that the contact surface shape of the middle hot pressing mechanism matches and matches the surface shape of the raised protection area, so that during the hot pressing process, the middle hot pressing mechanism can be closely fitted with the raised protection area to avoid the problem of poor fitting caused by uneven local force or excessive gap.

[0053] The raised protection area is an area that protects the raised portion of the folding screen, and its surface shape corresponds to the shape of the raised portion of the folding screen. In order for the central heat pressing mechanism to effectively apply pressure to the raised protection area and transfer heat, the contact surface shape of the central heat pressing mechanism needs to match the surface shape of the raised protection area. For example, when the raised portion of the folding screen is an arc, the contact surface of the central heat pressing mechanism is designed to be the same arc; when the raised portion of the folding screen is a multi-segment fold line, the contact surface of the central heat pressing mechanism is designed to be a multi-segment fold line that matches it; when the raised portion of the folding screen is a plane, the contact surface of the central heat pressing mechanism is designed to be a plane that matches it.

[0054] Through the shape-matching design, the middle hot pressing mechanism can achieve more uniform and close contact with the raised protective area during the hot pressing process, so that pressure and heat can be more effectively transferred to the protective film, improving the fitting quality of the raised protective area, reducing the probability of defects such as bubbles and wrinkles, and improving the adhesion effect of the entire protective film.

[0055] Furthermore, the embodiment of the present application also includes:

[0056] Step S310: when the folding screen is an irregular-corner folding screen, obtaining first shape information of the protective film and second shape information of the folding screen;

[0057] The first shape information has a first positioning point, the first positioning points have at least three, and at least one positioning point is not on the same straight line as the other positioning points;

[0058] The second shape information has a second positioning point, and the second positioning point corresponds to the first positioning point one by one;

[0059] Step S320: Align the protective film and the folding screen according to the first positioning point and the second positioning point.

[0060] In a preferred embodiment, when the folding screen to which the protective film is to be attached is a folding screen with irregular corners, the first shape information of the protective film and the second shape information of the folding screen are obtained. Among them, the first shape information refers to the shape feature data of the protective film, and the second shape information refers to the shape feature data of the folding screen. Since the outer contour of the folding screen with irregular corners usually presents an irregular shape, the shape of the protective film also needs to be adapted thereto to present a corresponding irregular shape. In order to achieve precise alignment of the irregular-shaped protective film with the folding screen, positioning points are introduced to achieve alignment of the protective film with the folding screen. Specifically, the first shape information includes at least three first positioning points, and at least one first positioning point is not on the same straight line as the other positioning points. Through such a positioning point setting, the position and direction of the protective film are uniquely determined in a two-dimensional plane. Correspondingly, the second shape information includes a second positioning point corresponding one-to-one to the first positioning point, which is used to characterize the position and direction of the folding screen in a two-dimensional plane.

[0061] For example, four non-collinear points are selected on the outer contour of the protective film as the first positioning points, which are located at the upper left corner, upper right corner, lower right corner and lower left corner of the protective film respectively; correspondingly, four points corresponding to the first positioning points are also selected on the outer contour of the folding screen as the second positioning points. For another example, three non-collinear points are selected on the outer contour of the protective film as the first positioning points, which are located at the protruding parts of the leftmost, rightmost and topmost of the protective film respectively; correspondingly, three points at corresponding positions are also selected on the outer contour of the folding screen as the second positioning points.

[0062] After obtaining the positioning point information of the protective film and the folding screen, the protective film and the folding screen are aligned according to the first positioning point and the second positioning point. The first positioning point of the protective film is spatially paired with the second positioning point of the folding screen, and the position and direction of the protective film are adjusted so that each pair of paired positioning points overlaps, thereby achieving overall alignment of the protective film and the folding screen.

[0063] Through the positioning point alignment method of the irregular corner folding screen, the protective film and the irregular folding screen can be quickly and accurately positioned, providing a reliable foundation for subsequent hot pressing bonding and improving the bonding yield rate.

[0064] Furthermore, the embodiment of the present application also includes:

[0065] Step S311: obtaining a first shape model of the protective film and a second shape model of the folding screen;

[0066] Step S312: extracting any endpoint group with the farthest distance from the second shape model and setting it as the first endpoint group;

[0067] Step S313: extracting all endpoint groups with the farthest distance from the first shape model and setting them as second endpoint groups, wherein any one of the second endpoint group and the first endpoint group has two endpoints;

[0068] Step S314: traversing the second endpoint group, performing alignment simulation with the first endpoint group, and obtaining the shape overlap between the first shape model and the second shape model;

[0069] Step S315: When the shape overlap degree is 100%, stop traversing the second endpoint group and construct the first positioning point and the second positioning point.

[0070] In a preferred embodiment, when obtaining the first shape information of the protective film and the second shape information of the folding screen, first, a first shape model of the protective film and a second shape model of the folding screen are obtained. The so-called shape model refers to a mathematical model or a geometric model that can characterize the shape characteristics of the outer contour of the protective film or the folding screen, for example, a polygonal model composed of a series of boundary point coordinates, or a curve model described by a mathematical equation, etc. The shape model is obtained by three-dimensional scanning, CAD modeling, etc.

[0071] Then, extract any endpoint group with the farthest distance from the second shape model (i.e., the shape model of the folding screen) and set it as the first endpoint group. Among them, the endpoint refers to the boundary point of the shape model, and the endpoint group with the farthest distance refers to the endpoint group in which the distance between the two endpoints is the largest among all endpoint groups. The first endpoint group characterizes the maximum size feature of the outer contour of the folding screen. Among them, there may be multiple first endpoint groups, and you can arbitrarily select one of them at this time. At the same time, extract all the endpoint groups with the farthest distance from the first shape model (i.e., the shape model of the protective film) and set them as the second endpoint group. Similar to the first endpoint group, the second endpoint group is also composed of two endpoints, which are used to characterize the maximum size feature of the outer contour of the protective film. Unlike the first endpoint group, there may be multiple second endpoint groups, and all of them need to be extracted.

[0072] Next, traverse each endpoint group in the second endpoint group, align and simulate it with the first endpoint group, and calculate the shape coincidence between the first shape model and the second shape model. Specifically, through transformation operations such as translation and rotation, the two endpoints of the second endpoint group are overlapped with the two endpoints of the first endpoint group respectively, and then the contour overlap of the two shape models is compared, and the proportion of the overlapping area to the total area is calculated, which is the shape coincidence. When the shape coincidence reaches 100%, it means that the second endpoint group completely overlaps with the first endpoint group, and the protective film and the folding screen are optimally aligned. At this time, stop traversing the second endpoint group, and use the second endpoint group and the first endpoint group when they overlap as the first positioning point and the second positioning point.

[0073] For example, assume that the shape model of the folding screen is an irregular hexagon, in which the two farthest endpoints are located at the upper left corner and the lower right corner, forming the first endpoint group. Correspondingly, the shape model of the protective film is also an irregular hexagon, and three groups of candidate second endpoint groups are extracted, which are located at the upper left corner and the lower right corner, the lower left corner and the upper right corner, and the upper midpoint and the lower midpoint. By traversing the three groups of second endpoint groups and aligning them with the first endpoint group, it is found that when the second endpoint group is the upper left corner and the lower right corner, the shape overlap reaches 100%. Therefore, the endpoints at the upper left corner and the lower right corner of the folding screen are used as the second positioning points, and the endpoints at the upper left corner and the lower right corner of the protective film are used as the first positioning points.

[0074] By extracting key features from the shape model and adopting an endpoint group matching strategy, the difficulty of directly positioning on complex irregular contours is avoided, and the positioning points of irregular-shaped protective films and folding screens are quickly and accurately acquired, providing a data basis for achieving precise alignment of the two and improving film pasting efficiency.

[0075] Furthermore, the embodiment of the present application also includes:

[0076] Step S3111: obtaining a plurality of endpoints of the protective film through machine vision;

[0077] Step S3112: connecting adjacent endpoints of the plurality of endpoints to construct the first shape model;

[0078] Step S3113: Construct the second shape model using the same method.

[0079] In a feasible implementation, when obtaining the first shape model of the protective film and the second shape model of the folding screen, first, several endpoints of the protective film are obtained by machine vision technology. Specifically, an industrial camera or other imaging device is used to capture an image of the protective film, and then the image is analyzed using an image processing algorithm to identify the feature points on the outer contour of the protective film, and extract their coordinate information as several endpoints. Among them, the feature points are located at the corners, vertices or other easily identifiable positions of the contour of the protective film, and the number is set according to the complexity of the shape of the protective film and the required positioning accuracy. Through machine vision technology, the automation and efficiency of endpoint extraction are achieved, avoiding the tediousness and errors of manual calibration. Then, based on the several endpoints obtained, the first shape model of the protective film is constructed by connecting adjacent endpoints. Specifically, according to the spatial order of the endpoints, two adjacent endpoints are connected in sequence to form a series of end-to-end line segments, thereby obtaining a polygonal approximation model of the outer contour of the protective film. When the number of endpoints is large enough, the polygonal model can accurately characterize the actual shape of the protective film. At the same time, the same method is used to construct the second shape model of the folding screen. That is, firstly, a number of endpoints on the outer contour of the folding screen are acquired through machine vision, and then a polygonal approximation model of the folding screen is generated by connecting adjacent endpoints to obtain a second shape model.

[0080] After constructing the shape models of the protective film and the folding screen, support is provided for extracting the endpoint groups of the two and determining the final positioning points through alignment simulation of the endpoint groups, thereby achieving precise alignment of the protective film and the folding screen.

[0081] Furthermore, the embodiment of the present application also includes:

[0082] Step S331: the first positioning points include a first front end point, a first rear end point, a first left end point, and a first right end point;

[0083] Step S332: the second positioning points include a second front end point, a second rear end point, a second left end point, and a second right end point;

[0084] Among them, the first front end point corresponds to the second front end point, the first rear end point corresponds to the second rear end point, the first left end point corresponds to the second left end point, and the first right end point corresponds to the second right end point.

[0085] In a preferred embodiment, the first positioning point is set to include four endpoints, namely, a first front end point, a first rear end point, a first left end point, and a first right end point. Among them, the front, rear, left, and right are relative to the orientation of the protective film, and are specifically determined according to the predetermined bonding position of the protective film on the folding screen, so as to determine the endpoints of the four orientations on the protective film as the first positioning point. The second positioning point is set to include four endpoints, namely, a second front end point, a second rear end point, a second left end point, and a second right end point. Similar to the first positioning point, the orientation of these four endpoints is also determined according to the predetermined bonding position on the folding screen. Specifically, the second front end point, the second rear end point, the second left end point, and the second right end point correspond to the first front end point, the first rear end point, the first left end point, and the first right end point, respectively. In other words, when the protective film is precisely bonded to the folding screen, the first front end point should coincide with the second front end point, the first rear end point should coincide with the second rear end point, the first left end point should coincide with the second left end point, and the first right end point should coincide with the second right end point.

[0086] Through the specific selection method of the positioning point, that is, one endpoint is selected from each of the four directions of the protective film and the folding screen as the positioning point, and a one-to-one mapping relationship between the first positioning point and the second positioning point is established through the corresponding direction. Among them, the endpoint is located at the edge of the protective film and the folding screen, which is easy to identify and extract, and there is no need for complex feature analysis, which improves the efficiency of positioning point acquisition. At the same time, through the corresponding pairing of the four endpoints, the translation and rotation transformation parameters of the protective film relative to the folding screen are quickly determined, which simplifies the alignment operation. In addition, the endpoint is located in the edge area, which is less affected by the shape changes of the protective film and the folding screen, and the positioning stability is good, which is conducive to improving the fitting accuracy.

[0087] Furthermore, the embodiment of the present application also includes:

[0088] Step S110: obtaining the median line of the raised protection area and the top line of the raised portion through machine vision;

[0089] Step S120: Control the middle hot pressing mechanism to press the middle line of the raised protection area to contact the top line of the raised portion at a first temperature and a first pressure.

[0090] In a feasible implementation, first, a machine vision system equipped with a depth camera is used to perform a three-dimensional scan of the protective film and the folding screen. The contour of the raised protection area of ​​the protective film is identified by an image processing algorithm, and the geometric center line, i.e., the median line, is determined in the area. At the same time, the depth information of the folding screen is analyzed, the contour and height distribution of the raised portion are identified, and the highest point is connected to form a top line. By obtaining the median line of the raised protection area and the top line of the raised portion, it is possible to accurately identify raised portions of different shapes, laying the foundation for subsequent precise hot pressing. Then, the central hot pressing mechanism is controlled to press the median line of the raised protection area against the top line of the raised portion according to the first temperature and the first pressure. Among them, the design of the central hot pressing mechanism can adopt a curved surface structure that matches the shape of the raised protection area, or a plane structure, or the surface of the plane structure can be covered with an elastic material. Subsequently, under the joint action of the first temperature and the first pressure, the central hot pressing mechanism accurately aligns and contacts the median line of the raised protection area of ​​the protective film with the top line of the raised portion of the folding screen, ensuring that the protective film at the raised portion is evenly fitted and effectively reducing the generation of bubbles.

[0091] Through the precisely controlled hot pressing method, the problems of poor lamination of raised parts and easy generation of bubbles in the prior art are effectively solved. At the same time, a good foundation is laid for the subsequent side lamination, ensuring the continuity and consistency of the entire film lamination process.

[0092] A method for quickly and automatically controlling heat pressing of a folding screen protective film provided by an embodiment of the present invention has at least the following technical effects:

[0093] By aligning the protective film with the folding screen through adsorption, the positions of the two are accurately matched, laying the foundation for subsequent bonding. The central heat pressing mechanism that matches the shape of the raised part is used to perform directional heating and pressurization on the raised protection area, so that the protective film and the raised part are tightly fitted, effectively reducing the generation of bubbles. The side heat pressing mechanism moves synchronously to both sides at the boundary of the central heat pressing area and applies heat pressure, which realizes the rapid bonding of the protective film and the non-raised part of the folding screen, shortens the film bonding time, and improves the bonding efficiency.

[0094] Furthermore, the first side heat pressing mechanism and the second side heat pressing mechanism respectively move synchronously from the two boundaries of the middle heat pressing area to both sides and apply heat pressing, thereby further shortening the film pasting time and improving the pasting efficiency.

[0095] Furthermore, a curved surface structure that matches the shape of the protective film is used as the contact surface of the central hot pressing mechanism, thereby achieving better fit with the raised portion and improving the attachment quality.

[0096] Furthermore, for folding screens with irregular corners, by obtaining the shape information of the protective film and the folding screen, the feature positioning points are extracted for precise alignment, laying the foundation for the bonding of the protective film and the folding screen with irregular corners.

[0097] In summary, a method for rapid and automatic hot pressing control of a folding screen protective film effectively solves the technical problems existing in the prior art such as poor attachment accuracy, easy generation of bubbles in raised parts, and low film attaching efficiency, thereby achieving rapid and precise bonding between the protective film and the folding screen.

[0098] Embodiment 2:

[0099] like Figure 5 As shown, based on the same inventive concept as the method for quickly and automatically controlling hot pressing of a folding screen protective film provided in Example 1, an embodiment of the present invention further provides a system for quickly and automatically controlling hot pressing of a folding screen protective film, comprising:

[0100] The raised area hot pressing module 11 is used to control the middle hot pressing mechanism to press the raised protection area of ​​the protective film to contact the raised portion of the folding screen at a first temperature and a first pressure after the adsorption protection film is aligned with the folding screen, wherein the raised protection area and the raised portion have the same shape;

[0101] The side moving film laminating module 12 is used to then move from the contact boundary between the central heat pressing mechanism and the raised protection area to the side of the protective film for laminating according to the second temperature and the second pressure through the side heat pressing mechanism, wherein the first temperature and the second temperature can be the same or different, and the first pressure and the second pressure can be the same or different.

[0102] Furthermore, the side moving film sticking module 12 includes the following execution steps:

[0103] The side heat pressing mechanism comprises a first side heat pressing mechanism and a second side heat pressing mechanism;

[0104] The contact boundary between the middle hot pressing mechanism and the raised protection area includes a first boundary and a second boundary;

[0105] By means of the first side heat pressing mechanism, the film is attached by moving from the first boundary to the first side edge of the protective film at the second temperature and the second pressure;

[0106] At the same time, the second side heat pressing mechanism is used to move from the second boundary to the second side edge of the protective film according to the second temperature and the second pressure to perform film lamination.

[0107] Furthermore, the contact surface shape of the middle hot pressing mechanism matches that of the raised protection area.

[0108] Furthermore, the embodiment of the present application also includes:

[0109] When the folding screen is an irregular-corner folding screen, obtaining first shape information of the protective film and second shape information of the folding screen;

[0110] The first shape information has a first positioning point, the first positioning points have at least three, and at least one positioning point is not on the same straight line as the other positioning points;

[0111] The second shape information has a second positioning point, and the second positioning point corresponds to the first positioning point one by one;

[0112] The protective film and the folding screen are aligned according to the first positioning point and the second positioning point.

[0113] Furthermore, the embodiment of the present application also includes:

[0114] Obtaining a first shape model of the protective film and a second shape model of the folding screen;

[0115] Extracting any endpoint group with the farthest distance from the second shape model and setting it as the first endpoint group;

[0116] Extracting all endpoint groups with the longest distance from the first shape model and setting them as second endpoint groups, wherein any one of the second endpoint group and the first endpoint group has two endpoints;

[0117] Traversing the second endpoint group, performing alignment simulation with the first endpoint group, and obtaining a shape overlap between the first shape model and the second shape model;

[0118] When the shape overlap degree is 100%, the traversal of the second endpoint group is stopped, and the first positioning point and the second positioning point are constructed.

[0119] Furthermore, the embodiment of the present application also includes:

[0120] Obtaining a plurality of endpoints of the protective film through machine vision;

[0121] Connecting adjacent endpoints of the plurality of endpoints to construct the first shape model;

[0122] The second shape model is constructed in the same way.

[0123] Furthermore, the embodiment of the present application also includes:

[0124] The first positioning points include a first front end point, a first rear end point, a first left end point, and a first right end point;

[0125] The second positioning points include a second front end point, a second rear end point, a second left end point, and a second right end point;

[0126] Among them, the first front end point corresponds to the second front end point, the first rear end point corresponds to the second rear end point, the first left end point corresponds to the second left end point, and the first right end point corresponds to the second right end point.

[0127] Furthermore, the raised area hot pressing module 11 includes the following execution steps:

[0128] Obtaining the median line of the raised protection area and the top line of the raised portion through machine vision;

[0129] The middle hot pressing mechanism is controlled to press the middle line of the raised protection area to contact the top line of the raised portion according to a first temperature and a first pressure.

[0130] Embodiment three:

[0131] See also Figure 6 , Figure 6 Schematic diagram of a hot pressing device provided by an embodiment of the present invention. Figure 6 As shown, an embodiment of the present invention provides a hot pressing device, comprising:

[0132] A middle heat pressing mechanism 21, wherein the first end surface of the middle heat pressing mechanism contacts the raised protection area of ​​the protective film, and is used to press the raised protection area of ​​the protective film to contact the raised portion of the folding screen, wherein the raised protection area and the raised portion have the same shape;

[0133] The side heat pressing mechanism 22 is used to move from the contact boundary between the middle heat pressing mechanism and the raised protection area to the side edge of the protection film to perform film lamination at a second temperature and a second pressure.

[0134] Further, such as Figure 4 As shown, the side heat pressing mechanism includes a first side heat pressing mechanism and a second side heat pressing mechanism; wherein, the contact boundary between the middle heat pressing mechanism and the raised protection area includes a first boundary and a second boundary, and the first side heat pressing mechanism is used to move from the first boundary to the first side edge of the protective film according to the second temperature and the second pressure to perform film lamination, and at the same time, the second side heat pressing mechanism is used to move from the second boundary to the second side edge of the protective film according to the second temperature and the second pressure to perform film lamination.

[0135] Furthermore, the contact surface between the middle hot pressing mechanism and the raised protection area is an arc mechanism that matches the shape of the raised protection area.

[0136] Furthermore, the contact surface between the side heat pressing mechanism and the protective film is a pointed mechanism.

[0137] Embodiment 4:

[0138] See also Figure 7 , Figure 7 A schematic diagram of an embodiment of a computer-readable storage medium provided in an embodiment of the present invention. Figure 7 As shown, this embodiment provides a computer-readable storage medium 30 on which a computer program 31 is stored. When the computer program 31 is executed by a processor, a folding screen protective film can be quickly and automatically controlled for heat pressing.

[0139] It should be noted that in the above embodiments, the description of each embodiment has its own emphasis, and for parts that are not described in detail in a certain embodiment, reference can be made to the relevant descriptions of other embodiments.

[0140] It will be appreciated by those skilled in the art that embodiments of the present invention may be provided as methods, systems, or computer program products. Therefore, the present invention may take the form of a complete hardware embodiment, a complete software embodiment, or an embodiment combining software and hardware. Furthermore, the present invention may take the form of a computer program product implemented on one or more computer-usable storage media (including but not limited to disk storage, CD-ROM, optical storage, etc.) containing computer-usable program code.

[0141] The present invention is described with reference to flowcharts and / or block diagrams of methods, devices (systems), and computer program products according to embodiments of the present invention. It should be understood that each process and / or block in the flowchart and / or block diagram, as well as the combination of processes and / or blocks in the flowchart and / or block diagram, can be implemented by computer program instructions. These computer program instructions can be provided to a processor of a general-purpose computer, a special-purpose computer, an embedded computer, or other programmable data processing device to produce a machine, so that the instructions executed by the processor of the computer or other programmable data processing device generate instructions for implementing the processes in the flowchart and / or block diagram. Figure 1 A process or multiple processes and / or boxes Figure 1 A system that specifies the functions of a box or boxes.

[0142] These computer program instructions may also be stored in a computer-readable memory that can direct a computer or other programmable data processing device to work in a specific manner, so that the instructions stored in the computer-readable memory produce a product including an instruction system, which is implemented in the process Figure 1 A process or multiple processes and / or boxes Figure 1 A function specified in one or more boxes.

[0143] These computer program instructions can also be loaded onto a computer or other programmable data processing device so that a series of operating steps are executed on the computer or other programmable device to produce a computer-implemented process, thereby providing instructions for implementing the process. Figure 1 A process or multiple processes and / or boxes Figure 1 The steps for the functions specified in one or more boxes.

[0144] Although preferred embodiments of the present invention have been described, additional changes and modifications may occur to these embodiments once those skilled in the art understand the basic inventive concepts.

[0145] Obviously, those skilled in the art can make various changes and modifications to the present invention without departing from the spirit and scope of the present invention. Thus, if these modifications and variations of the present invention belong to the scope of the present invention and its equivalent technologies, the present invention is also intended to include these changes and variations.

Claims

1. A method for quickly and automatically controlling heat pressing of a folding screen protective film, characterized in that: Applied to hot pressing equipment, the hot pressing equipment includes a middle hot pressing mechanism and a side hot pressing mechanism, including: After the adsorption protective film is aligned with the folding screen, the central heat pressing mechanism is controlled to press the raised protection area of ​​the protective film to contact the raised portion of the folding screen at a first temperature and a first pressure, wherein the raised protection area matches the raised portion in shape; Then, the side heat pressing mechanism is used to move from the contact boundary between the middle heat pressing mechanism and the raised protection area to the side edge of the protection film at a second temperature and a second pressure to perform film lamination, wherein the first temperature and the second temperature are the same or different, and the first pressure and the second pressure are the same or different; Among them, it also includes: When the folding screen is an irregular-corner folding screen, obtaining first shape information of the protective film and second shape information of the folding screen; The first shape information has a first positioning point, the first positioning points have at least three, and at least one positioning point is not on the same straight line as the other positioning points; The second shape information has a second positioning point, and the second positioning point corresponds to the first positioning point one by one; Aligning the protective film and the folding screen according to the first positioning point and the second positioning point; Wherein, obtaining the first shape information of the protective film and the second shape information of the folding screen includes: Obtaining a first shape model of the protective film and a second shape model of the folding screen; Extracting any endpoint group with the farthest distance from the second shape model and setting it as the first endpoint group; Extracting all endpoint groups with the farthest distance from the first shape model and setting them as the second endpoint group, wherein any one of the second endpoint group and the first endpoint group has two endpoints, and the endpoint group with the farthest distance means that the distance between the two endpoints in the endpoint group is the largest among all endpoint groups; Traversing the second endpoint group, performing alignment simulation with the first endpoint group, and obtaining a shape overlap between the first shape model and the second shape model; When the shape overlap degree is 100%, the traversal of the second endpoint group is stopped, and the first positioning point and the second positioning point are constructed.

2. The method according to claim 1, characterized in that Then, the side heat pressing mechanism is used to move from the contact boundary between the middle heat pressing mechanism and the raised protection area to the side edge of the protection film at the second temperature and the second pressure to perform film lamination, including: The side heat pressing mechanism comprises a first side heat pressing mechanism and a second side heat pressing mechanism; The contact boundary between the middle hot pressing mechanism and the raised protection area includes a first boundary and a second boundary; By means of the first side heat pressing mechanism, the film is attached by moving from the first boundary to the first side edge of the protective film at the second temperature and the second pressure; At the same time, the second side heat pressing mechanism is used to move from the second boundary to the second side edge of the protective film according to the second temperature and the second pressure to perform film lamination.

3. The method according to claim 1, characterized in that The contact surface shape of the middle hot pressing mechanism and the raised protection area matches each other.

4. The method according to claim 1, characterized in that Obtaining a first shape model of the protective film and a second shape model of the folding screen, comprising: Obtaining a plurality of endpoints of the protective film through machine vision; Connecting adjacent endpoints of the plurality of endpoints to construct the first shape model; The second shape model is constructed in the same way.

5. The method according to claim 1, characterized in that Also includes: The first positioning points include a first front end point, a first rear end point, a first left end point, and a first right end point; The second positioning points include a second front end point, a second rear end point, a second left end point, and a second right end point; Among them, the first front end point corresponds to the second front end point, the first rear end point corresponds to the second rear end point, the first left end point corresponds to the second left end point, and the first right end point corresponds to the second right end point.

6. The method according to any one of claims 1 to 3, characterized in that: Controlling the middle heat pressing mechanism to press the raised protection area of ​​the protective film to contact the raised portion of the folding screen at a first temperature and a first pressure includes: Obtaining the median line of the raised protection area and the top line of the raised portion through machine vision; The middle hot pressing mechanism is controlled to press the middle line of the raised protection area to contact the top line of the raised portion according to a first temperature and a first pressure.

7. A fast automatic control hot pressing system for a folding screen protective film, characterized in that: Applied to hot pressing equipment, the hot pressing equipment includes a middle hot pressing mechanism and a side hot pressing mechanism, including: A raised area heat pressing module, used for controlling the middle heat pressing mechanism to press the raised protection area of ​​the protective film to contact the raised portion of the folding screen at a first temperature and a first pressure after the adsorption protection film is aligned with the folding screen, wherein the raised protection area and the raised portion have the same shape; A side moving film laminating module is used to move from the contact boundary between the middle heat pressing mechanism and the raised protection area to the side of the protection film to perform film laminating at a second temperature and a second pressure through the side heat pressing mechanism, wherein the first temperature and the second temperature are the same or different, and the first pressure and the second pressure are the same or different; Among them, it also includes: When the folding screen is an irregular-corner folding screen, obtaining first shape information of the protective film and second shape information of the folding screen; The first shape information has a first positioning point, the first positioning points have at least three, and at least one positioning point is not on the same straight line as the other positioning points; The second shape information has a second positioning point, and the second positioning point corresponds to the first positioning point one by one; Aligning the protective film and the folding screen according to the first positioning point and the second positioning point; Wherein, obtaining the first shape information of the protective film and the second shape information of the folding screen includes: Obtaining a first shape model of the protective film and a second shape model of the folding screen; Extracting any endpoint group with the farthest distance from the second shape model and setting it as the first endpoint group; Extracting all endpoint groups with the farthest distance from the first shape model and setting them as the second endpoint group, wherein any one of the second endpoint group and the first endpoint group has two endpoints, and the endpoint group with the farthest distance means that the distance between the two endpoints in the endpoint group is the largest among all endpoint groups; Traversing the second endpoint group, performing alignment simulation with the first endpoint group, and obtaining a shape overlap between the first shape model and the second shape model; When the shape overlap degree is 100%, the traversal of the second endpoint group is stopped, and the first positioning point and the second positioning point are constructed.

8. A hot pressing device, characterized in that: Used to implement the method according to any one of claims 1 to 5, comprising: A middle heat-pressing mechanism, wherein a first end surface of the middle heat-pressing mechanism contacts the raised protection area of ​​the protective film, and is used to press the raised protection area of ​​the protective film to contact the raised portion of the folding screen, wherein the raised protection area and the raised portion have the same shape; The side heat pressing mechanism is used to move from the contact boundary between the middle heat pressing mechanism and the raised protection area to the side edge of the protection film for film lamination at a second temperature and a second pressure.

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