Film pasting equipment and film pasting method

Abstract

The invention discloses film pasting equipment and a film pasting method. The film pasting equipment comprises a first cavity; the second cavity can be in butt joint with the first cavity, the second cavity is provided with a bearing area, and the bearing area is used for bearing a pre-positioned lens and a functional membrane material; the flexible film layer is arranged at the opening end of the first cavity, and the flexible film layer is used for deforming under the action of external force and extruding the functional film material in the bearing space, so that the functional film material is attached to the lens; and the illumination module is used for illuminating the functional film material, so that the bonding layer between the functional film material and the lens is cured, and the functional film material and the lens are bonded and fixed.

Description

Technical Field

[0001] The present application belongs to the technical field of preparation of optical lenses, and in particular to a film pasting device and a film pasting method. Background Art

[0002] With the continuous development of science and technology, Extended Reality (XR) technology has gradually entered various industries. Among them, XR includes Virtual Reality (VR), Augmented Reality (AR), Mixed Reality (MR), etc. Taking VR devices in VR application scenarios as an example, users can use VR devices, such as VR glasses, to watch virtual reality scenes.

[0003] Folded optical path (Pancake) is a major breakthrough in achieving optical thinness of optical modules in VR devices. The volume of the optical module is greatly compressed by folding the optical path. Specifically, Pancake is based on a folded optical path composed of functional film materials such as quarter-wave plates, reflective film layers, polarizing film layers, and lenses. The optical path is folded back and forth multiple times to achieve a disguised shortening of the imaging working distance between the screen and the lens, which significantly reduces the length of the entire optical module. In related technologies, in order to bring a larger field of view (FOV) and better imaging quality, lenses with curved surfaces are usually used, which makes it difficult to bond the functional film materials to the lenses. Summary of the invention

[0004] The embodiments of the present application provide a film pasting device and a film pasting method to solve the technical problem in the related art that it is difficult to paste a functional film material onto a lens with a curved surface.

[0005] In a first aspect, the present application provides a film laminating device, comprising:

[0006] a first cavity;

[0007] A second cavity, wherein the second cavity can be docked with the first cavity, and the second cavity has a bearing area, and the bearing area is used to bear the pre-positioned lenses and functional film materials;

[0008] A flexible film layer, the flexible film layer is arranged at the opening end of the first cavity, and the flexible film layer is used to deform under the action of an external force and squeeze the functional film material so that the functional film material fits the lens;

[0009] A lighting module is used to illuminate the functional film material, so that the bonding layer between the functional film material and the lens is cured, thereby bonding and fixing the functional film material to the lens.

[0010] In a second aspect, the present application provides a film pasting method, comprising:

[0011] Placing the pre-positioned lenses and functional film materials in the bearing area of ​​the second cavity of the film laminating equipment;

[0012] The first cavity of the film laminating device is connected to the second cavity, so that the flexible film layer disposed at the open end of the first cavity presses the functional film material, so that the functional film material is laminated to the lens;

[0013] The illumination module of the film sticking equipment is turned on to solidify the adhesive layer between the functional film material and the lens under the illumination of the illumination module, so that the functional film material and the lens are bonded and fixed.

[0014] The film pasting equipment and film pasting method provided by the present application are provided with a first cavity, a second cavity, a flexible film layer and a lighting module in the film pasting equipment. When the first cavity and the second cavity are connected, the shape of the flexible film layer located at the open end of the first cavity can change, and the deformed flexible film layer will generate a force and squeeze the functional film material located on the bearing area of ​​the second cavity until the functional film material is tightly fitted to the lens, and then the bonding layer between the functional film material and the lens is irradiated by the lighting module. The bonding layer is cured to reliably bond the functional film material to the lens, so that curved surface bonding can be achieved without hot bending forming, avoiding the problems of difficulty in precision control and poor matching between the functional film material and the lens surface caused by the rebound phenomenon after hot bending forming. It is not only easy to implement, but also conducive to improving product yield and reducing the process difficulty of curved surface bonding. BRIEF DESCRIPTION OF THE DRAWINGS

[0015] In order to more clearly illustrate the technical solutions in the embodiments of the present application or related technologies, the following is a brief introduction to the drawings required for use in the embodiments or related technical descriptions. Obviously, the drawings described below are some embodiments of the present application. For ordinary technicians in this field, other drawings can be obtained based on these drawings without creative work. In the drawings:

[0016] Figure 1 A schematic diagram of a scenario of a film laminating device provided in an embodiment of the present application;

[0017] Figure 2 A schematic diagram of the cross-sectional structure of the film laminating device provided in one embodiment of the present application when the first cavity and the second cavity are in a non-joint state;

[0018] Figure 3 A schematic diagram of the cross-sectional structure of the film laminating device provided in one embodiment of the present application when the first cavity and the second cavity are in a docking state;

[0019] Figure 4This is a schematic diagram of the application of film pasting using the film pasting device provided by one embodiment of the present application;

[0020] Figure 5 This is a schematic diagram of the structure of the functional film material and the adhesive layer in one embodiment of the present application;

[0021] Figure 6 This is a schematic structural diagram of a functional film material and an adhesive layer in another embodiment of the present application;

[0022] Figure 7 A schematic diagram of the cross-sectional structure of a film laminating device provided by another embodiment of the present application when the first cavity and the second cavity are in a non-joint state;

[0023] Figure 8 A schematic diagram of the application of applying a film to a lens with a convex bonding surface by using the film applying device provided in one embodiment of the present application;

[0024] Fig. 9 A schematic cross-sectional structure diagram of a film laminating device provided in another embodiment of the present application when the first cavity and the second cavity are in a non-joint state;

[0025] Fig.10 This is a schematic diagram of the structure of a functional film material and a positioning film layer in one embodiment of the present application;

[0026] Fig.11 This is a schematic diagram of the structure of the lens, the functional film material and the positioning film layer in one embodiment of the present application;

[0027] Fig.12 This is a schematic diagram of the structure of the positioning film layer in one embodiment of the present application;

[0028] Fig.13 A schematic diagram of a scenario of a film-sticking device provided in another embodiment of the present application;

[0029] Fig.14 A schematic diagram of the application of applying a film to a lens with a concave bonding surface by using the film applying device provided in one embodiment of the present application;

[0030] Fig.15 A schematic diagram of a process of a film pasting method provided in one embodiment of the present application;

[0031] Fig.16 A schematic flow chart of a film pasting method provided in another embodiment of the present application.

[0032] Description of Figure Numbers:

[0033] 10-first cavity; 11-first frame; 12-inner space; 13-joining surface; 10a-positioning hole;

[0034] 20-second cavity; 21-bearing area; 22-docking area; 23-air flow channel; 231-air vent; 232-confluence hole; 24-groove; 25-avoidance groove; 26-positioning part;

[0035] 30-flexible membrane layer;

[0036] 40-lighting module;

[0037] 50-vacuum pump;

[0038] 80-lens;

[0039] 90 - functional film material; 91 - adhesive layer; 92 - positioning film layer; 92a - through hole; 921 - positioning main body; 922 - positioning ear. DETAILED DESCRIPTION

[0040] The embodiments of the present application are described in detail below, and examples of the embodiments are shown in the accompanying drawings. The embodiments described below with reference to the accompanying drawings are exemplary and are intended to be used to explain the present application, but cannot be understood as limiting the present application.

[0041] The embodiments of the present application can be applied to extended reality (XR) application scenarios. XR may include virtual reality (VR), augmented reality (AR), mixed reality (MR), etc.

[0042] First, some nouns or terms that appear in the description of the embodiments of the present application are explained as follows:

[0043] Extended Reality (XR) is a concept that includes Virtual Reality (VR), Augmented Reality (AR) and Mixed Reality (MR). It refers to the technology that creates an environment in which the virtual world is connected to the real world, and users can interact with the environment in real time.

[0044] Virtual Reality (VR) is a technology for creating and experiencing a virtual world. It generates a virtual environment by computation. It is a multi-source information (the virtual reality mentioned in this article includes at least visual perception, and can also include auditory perception, tactile perception, motion perception, and even taste perception, olfactory perception, etc.). It realizes the simulation of the fusion and interactive three-dimensional dynamic vision and entity behavior of the virtual environment, immersing users in a simulated virtual reality environment, and realizing its application in various virtual environments such as maps, games, videos, education, medical treatment, simulation, collaborative training, sales, assisted manufacturing, maintenance and repair.

[0045] The virtual field of view refers to the area in the virtual environment that the user can perceive through the lens in the virtual reality device, and the field of view (FOV) of the virtual field of view is used to represent the perceived area.

[0046] Virtual reality devices, or VR devices, are terminals for realizing virtual reality effects. They can usually be provided in the form of glasses, helmet-mounted displays (Head Mount Display, HMD), and contact lenses to realize visual perception and other forms of perception. Of course, the form of virtual reality devices is not limited to this, and they can be further miniaturized or enlarged as needed.

[0047] The virtual reality devices described in the embodiments of the present application may include but are not limited to the following types:

[0048] Computer-based virtual reality (PCVR) devices use the PC to perform relevant calculations and data output for virtual reality functions. External computer-based virtual reality devices use the data output by the PC to achieve virtual reality effects.

[0049] Mobile virtual reality devices support the setting of mobile terminals (such as smart phones) in various ways (such as head-mounted displays with dedicated card slots). Through wired or wireless connection with the mobile terminal, the mobile terminal performs relevant calculations of virtual reality functions and outputs data to the mobile virtual reality device, such as watching virtual reality videos through the mobile terminal's APP.

[0050] The all-in-one virtual reality device has a processor for performing relevant calculations of virtual functions, and thus has independent virtual reality input and output functions. It does not need to be connected to a PC or mobile terminal and has a high degree of freedom in use.

[0051] In the related technology, the optical module of VR equipment usually includes lenses and functional film materials such as quarter-wave plates, reflective film layers, and polarizing film layers, and the functional film materials are bonded to the surface of the lenses. Among them, in the process of bonding the functional film materials to the lenses, the use of a flat film layer process will sacrifice some optical performance and imaging quality. As users have higher and higher requirements for the user experience, they are gradually adopting curved lenses and curved film layer processes to bring larger FOV and better imaging quality, but the curved film layer process is more difficult.

[0052] In some related technologies of curved surface film lamination process, the functional film materials such as quarter wave plate, reflective film layer, polarizing film layer are flatly laminated to the lens surface, and after lamination, the functional film material and the lens are integrally thermally bent using a mold to achieve the film material curved surface lamination effect. The difficulty of the above curved surface film lamination process lies in: there is a rebound phenomenon after thermal bending, and it is difficult to control the dimensional accuracy; after the thickness of the lens exceeds a certain thickness, the thermal bending yield is low, and even thermal bending cannot be achieved; it is impossible to achieve thermal bending of complex shapes, such as bending of aspherical shapes.

[0053] In other related technologies of curved film layer processes, at least one film material monomer in the functional film material is first cut into the required size, and then the film material monomer is heat-bent using a mold to make the shape of the film material monomer after heat bending close to the shape of the lens, and finally the film material monomer is bonded to the surface of the lens. The difficulty of the above curved film layer process lies in: due to the low rigidity of the functional film material, there is a significant rebound phenomenon after heat bending, resulting in poor matching between the functional film material and the lens surface, and it is very easy to have edge warping or wrinkles after bonding, which will further cause the optical axis of the optical module to change and thus affect the optical performance.

[0054] In order to overcome at least one of the above problems, the bonding equipment and bonding method provided in the present embodiment, when the first cavity and the second cavity are docked, the flexible film layer located at the open end of the first cavity can change based on the surface shape of the lens, and the deformed flexible film layer will generate a force and act on the functional film material located on the bearing area of ​​the second cavity, squeezing the functional film material until the functional film material and the lens are tightly fitted. After the preset squeezing time, the bonding layer between the functional film material and the lens is irradiated by the lighting module, and the bonding layer is cured to reliably bond the functional film material to the lens, thereby achieving curved surface bonding without hot bending forming, avoiding the problems of difficulty in precision control and poor matching between the functional film material and the lens surface caused by the rebound phenomenon after hot bending forming. It is not only easy to implement, but also conducive to improving product yield and reducing the process difficulty of curved surface bonding.

[0055] The technical solution of the present application and how the technical solution of the present application solves the above-mentioned technical problems are described in detail below with specific embodiments. The following specific embodiments can be combined with each other, and the same or similar concepts or processes may not be repeated in some embodiments. The embodiments of the present application will be described below in conjunction with the accompanying drawings.

[0056] Please refer to Figures 1 to 6 The film laminating device provided in this embodiment includes: a first cavity 10, a second cavity 20, a flexible film layer 30 and a lighting module 40. The second cavity 20 can be docked with the first cavity 10, and the second cavity 20 has a bearing area 21, and the bearing area 21 is used to carry the pre-positioned lens 80 and the functional film material 90. The flexible film layer 30 is arranged at the opening end of the first cavity 10, and the flexible film layer 30 is used to deform under the action of external force and squeeze the functional film material 90 in the bearing space, so that the functional film material 90 is laminated with the lens 80. The lighting module 40 is used to irradiate the functional film material 90, so that the adhesive layer 91 between the functional film material 90 and the lens 80 is cured, and the functional film material 90 is bonded and fixed to the lens 80.

[0057] For example, Figure 2 As shown, the first cavity 10 has a first frame 11 and an internal space 12 defined by the first frame 11. The internal space 12 defined by the first frame 11 can be used to accommodate other structures such as the illumination module 40. The specific shape and specific size of the internal space 12 defined by the first frame 11 can be set according to actual needs. For example, the first frame 11 is roughly prismatic or cylindrical, and the internal space 12 defined by the first frame 11 can also be roughly prismatic or cylindrical.

[0058] The first cavity 10 has an open end facing the second cavity 20. The end surface of the open end of the first cavity 10 can constitute the docking surface 13 of the first cavity 10. The second cavity 20 has an end surface facing the first cavity 10, and the end surface has a docking area 22 located outside the bearing area 21, and the part of the second cavity 20 located in the docking area 22 can cooperate with the docking surface 13.

[0059] In this embodiment, the second cavity 20 and the first cavity 10 have two states, such as Figure 2 As shown, one of the states is a separation state in which the second cavity 20 and the first cavity 10 are separated from each other, that is, a non-docking state; Figure 3 As shown, another state is the docking state where the second cavity 20 is docked with the first cavity 10. The process of docking the second cavity 20 with the first cavity 10 can also be called the mold closing process, and the docking state can also be called the mold closing state.

[0060] For ease of description, this embodiment will be described by taking the second cavity 20 and the first cavity 10 in a docking state as an example, specifically taking the second cavity 20 being located below the first cavity 10 as an example.

[0061] The second cavity 20 is in the shape of a seat. The specific shape and size of the second cavity 20 can be set according to actual needs. Generally speaking, the shape of the second cavity 20 is compatible with the shape of the first frame 11. For example, when the first frame 11 is in the shape of a prism, the second cavity 20 is in the shape of a prism; when the first frame 11 is in the shape of a cylinder, the second cavity 20 is in the shape of a cylinder.

[0062] The second cavity 20 has a bearing area 21 for supporting the pre-positioned lens 80 and the functional film material 90. Exemplarily, the bearing area 21 may include an area where the orthographic projections of the pre-positioned lens 80 and the functional film material 90 on the upper end surface of the second cavity 20 are located.

[0063] like Figure 3 As shown, in the docking state, the second cavity 20 can enclose a bearing space together with the flexible film layer 30 disposed at the open end of the first cavity 10, and the lens 80 and the functional film material 90 carried by the bearing area 21 are located in the bearing space. Among them, the flexible film layer 30 can be made of a transparent material, and the flexible film layer 30 has great toughness and is airtight. The flexible film layer 30 can be fixedly connected to the first cavity 10 by a fixed connection method such as bonding, so as to isolate the bearing space from the space above the flexible film layer 30.

[0064] In some examples, when the first cavity 10 and the second cavity 20 are in a docking state, a portion of the flexible film layer 30 is sandwiched between the docking surface 13 of the first cavity and the docking area 22 of the second cavity. Among them, the flexible film layer 30 can be fixedly connected to the docking surface 13 of the first cavity. The outer edge of the flexible film layer 30 can be flush with the outer edge of the docking surface 13 of the first cavity away from the internal space 12, or the outer edge of the flexible film layer 30 is located on the inner side of the outer edge of the docking surface 13 of the first cavity. In this way, the flexible film layer 30 can also play a sealing role to prevent the bearing space from communicating with the external space through the gap between the docking surface 13 of the first cavity and the docking area 22 of the second cavity. In other examples, the flexible film layer 30 can also be fixedly connected to the inner wall of the first cavity 10.

[0065] Figure 4 This is a schematic diagram of the application of film pasting using the film pasting equipment provided by one embodiment of the present application.

[0066] in, Figure 4 The two pictures on the left are schematic diagrams of the three-dimensional structure. Figure 4 The two pictures on the right are schematic diagrams of the cross-section structure. Figure 4 The film pasting process is explained with an example.

[0067] like Figure 4 As shown in the first left figure, before the first cavity 10 and the second cavity 20 are connected, the pre-positioned lens 80 and the functional film material 90 are placed on the bearing area 21 of the second cavity 20, and the functional film material 90 is located on the upper side of the lens 80. The flexible film layer 30 at the open end of the first cavity 10 is in a free state. When the flexible film layer 30 is in a free state, the flexible film layer 30 is generally in a downwardly concave curved surface. In other examples, the flexible film layer 30 is generally in a planar shape.

[0068] like Figure 4 As shown in the second and third figures on the left side, during the docking process between the first cavity 10 and the second cavity 20, the first cavity 10 is placed above the second cavity 20, and the first cavity 10 and the second cavity 20 are opposite to each other. At least one of the first cavity 10 and the second cavity 20 is moved so that the distance between the two is gradually reduced until the docking surface 13 of the first cavity cooperates with the docking area 22 of the second cavity and is docked in place.

[0069] During the above docking process, the flexible film layer 30 can be deformed under the action of external force, and the force generated by the deformation can act on the functional film material 90 to exert an extrusion effect on the functional film material 90, such as Figure 4 As shown in the two figures on the right side of the middle, the functional film material 90 gradually changes into a curved surface that matches the bonding surface of the lens 80. The external force applied to the flexible film layer 30 may be the force applied by the lens 80 and the functional film material 90, the force generated by the pressure difference between the upper side and the lower side of the flexible film layer 30, or the force applied by other structural parts.

[0070] When the bonding surface of the lens 80 is a convex surface protruding toward the functional film material 90, in the pre-positioned functional film material 90 and the lens 80, as shown in FIG. Figure 4 As shown in the first figure on the left, the edge of the functional film 90 is in a warped state relative to the lens 80. Figure 4 As shown in the second and third figures on the left side of the middle, when the distance between the first cavity 10 and the second cavity 20 is reduced to a certain extent, the flexible film layer 30 can contact the functional film material 90 on the upper side of the lens 80. As the distance between the first cavity 10 and the second cavity 20 continues to decrease, the flexible film layer 30 can be deformed and generate a force under the action of the lens 80 and the functional film material 90. The force acts on the functional film material 90 to squeeze the functional film material 90, as shown in FIG. Figure 4 As shown in the two figures on the right side of the middle, the functional film material 90 gradually becomes a convex surface that matches the bonding surface of the lens 80 until the functional film material 90 and the lens 80 are completely bonded.

[0071] When the fitting surface of the lens 80 is a concave surface that is recessed away from the functional film material 90 (not shown in the figure), after being docked in place, the flexible film layer 30 can be deformed and generate a force under the force generated by the upper and lower pressure differences or the force applied by other structural parts. The force acts on the functional film material 90 to squeeze the functional film material 90, so that the functional film material 90 gradually becomes a concave surface that matches the fitting surface of the lens 80 until the functional film material 90 is completely fitted to the lens 80.

[0072] After the functional film material 90 is attached to the lens 80 and the flexible film layer 30 is kept squeezed for a certain period of time, the illumination module 40 can be started so that the light emitted by the illumination module 40 can irradiate the photoinitiator in the adhesive layer 91, thereby curing the adhesive layer 91 and bonding and fixing the functional film material 90 to the lens 80.

[0073] The illumination module 40 is disposed in the first cavity 10 or in the second cavity 20, so that the light emitted by the illumination module 40 can irradiate the adhesive layer 91. The illumination module 40 can be located above or below the bearing area 21, and the illumination module 40 can be located above or below the center of the bearing area 21. For example, Figure 2 and Figure 3 As shown, the illumination module 40 is disposed on the inner wall of the first cavity 10 and is located in the central area of ​​the upper inner wall, so that the illumination module 40 can be located above the center of the bearing space.

[0074] In some examples, the irradiation area of ​​the illumination module 40 at least covers the bearing area 21, which is conducive to fully covering the adhesive layer 91 so that the adhesive layer 91 can be cured everywhere. The bearing area 21 is the area where the orthographic projections of the functional film material 90 and the lens 80 on the end surface of the second cavity 20 facing the first cavity 10 are located.

[0075] In some examples, the illumination module 40 includes an ultraviolet light irradiation module. The adhesive layer 91 of the bearing area 21 includes at least one of the following: a transparent photoinitiator and acrylic acid. The transparent photoinitiator includes but is not limited to 2-hydroxy-2-methyl-1-phenylpropanone and methyl benzoylformate. Acrylic acid can also be replaced by other materials containing carbon-carbon double bonds or epoxy components. In this way, after ultraviolet light with a wavelength of 250 to 400 nm is irradiated to the transparent photoinitiator, free radicals and carbon-carbon double bonds or epoxy reactions are generated in the adhesive layer 91 to cure, so that the cured adhesive layer 91 reliably bonds the functional film material 90 to the lens 80. In other examples, the illumination module 40 can also use light of other wavelengths to irradiate the corresponding transparent photoinitiator and produce corresponding reaction curing.

[0076] In this embodiment, the functional film material 90 includes at least one of the following: a polarizing film layer, a reflective film layer, and a quarter wave plate.

[0077] After the pre-positioning of the lens 80 and the functional film material 90, Figure 5 As shown, when the functional film material 90 has one, the functional film material 90 has a bonding surface facing the lens 80, and the lens 80 has a bonding surface facing the functional film material 90, and the bonding surface of the functional film material 90 is provided with a bonding layer 91. The bonding layer 91 includes a photoinitiator, so that the bonding layer 91 can be cured under light irradiation, and the functional film material 90 and the lens 80 are bonded and fixed.

[0078] In the pre-positioned lens 80 and functional film material 90, as Figure 6 As shown, when there are multiple functional film materials 90, the surface of the functional film material 90 facing the adjacent film material is also a bonding surface, and the bonding surface is also provided with an adhesive layer 91 including a photoinitiator, so that two adjacent functional film materials 90 can be bonded and fixed through the adhesive layer 91, and the functional film material 90 adjacent to the lens 80 can also be bonded and fixed to the lens 80 through the adhesive layer 91.

[0079] The film laminating device provided in this embodiment is provided with a first cavity 10; a second cavity 20, the second cavity 20 can be docked with the first cavity 10, and the second cavity 20 has a bearing area 21, the bearing area 21 is used to bear the pre-positioned lens 80 and the functional film material 90; a flexible film layer 30, the flexible film layer 30 is provided at the opening end of the first cavity 10, the flexible film layer 30 is used to deform under the action of external force and squeeze the functional film material 90 in the bearing space, so that the functional film material 90 and the lens 80 are bonded; a lighting module 40, the lighting module 40 in the bearing area 21 irradiates the functional film material 90, so that the adhesive layer 91 between the functional film material 90 and the lens 80 is cured, and the functional film material 90 and the lens 80 are bonded and fixed. In this way, the curved surface film layer can be realized without hot bending forming, avoiding the problems of difficulty in precision control caused by the rebound phenomenon after hot bending forming, poor surface matching between the functional film material 90 and the lens 80, etc. It is not only easy to realize, but also conducive to improving product yield and reducing the process difficulty of curved surface bonding.

[0080] Figure 7 This is a schematic cross-sectional structure diagram of a film laminating device provided by another embodiment of the present application when the first cavity 10 and the second cavity 20 are in a non-joint state. Figure 7 In the figure, 30a is used to illustrate the flexible membrane layer 30 in a free state, and 30b is used to illustrate the flexible membrane layer 30 in a deformed state.

[0081] Please refer to Figure 7 In some embodiments, the second cavity 20 is provided with an airflow channel 23, which is connected to the carrying space. The film laminating device in the carrying area 21 further includes: a vacuum pump 50, which is connected to the airflow channel 23 and is used to evacuate the carrying space.

[0082] Exemplarily, the air flow channel 23 includes an air hole 231 and a confluence hole 232, and the air hole 231 is used to connect the bearing space with the confluence hole 232. The air hole 231 can be extended in the up-down direction, that is, the axial direction of the air hole 231 is parallel to the up-down direction. There can be multiple air holes 231, and the multiple air holes 231 are evenly distributed to facilitate the uniformity of the air pressure in the bearing space. For example, the multiple air holes 231 can be distributed in a dot matrix. For another example, the multiple air holes 231 are evenly distributed along a preset circumference, and specifically can be evenly distributed along one circle or multiple circles. In this example, the specific number of the air holes 231 is not specifically limited, and the distribution method of the air holes 231 is not limited thereto, as long as it can guide the airflow in the bearing space.

[0083] The confluence hole 232 can be arranged at the lower end of the air holes 231, and the confluence hole 232 is used to converge the airflows flowing out of each air hole 231 and guide them to the vacuum pump 50. The specific shape of the confluence hole 232 can be set according to actual needs, and this embodiment is not limited here. Exemplarily, when the air holes 231 are distributed along the circumference, the confluence hole 232 may include a first section and a second section that are connected, the first section is annular, the first section is located at the lower end of each air hole 231, and the second section is used to connect the first section with the vacuum pump 50.

[0084] The specific position of the second section of the confluence hole 232 can be set according to the relative position of the vacuum pump 50 and the second cavity 20. For example, when the vacuum pump 50 is located at the side of the second cavity 20, the axial direction of the second section can be set perpendicular to the up-down direction. For another example, when the vacuum pump 50 is located below the second cavity 20, the axial direction of the second section can be set parallel to the up-down direction.

[0085] The specific shape of the second section of the confluence hole 232 can be set according to the shape of the interface of the vacuum pump 50. For example, when the interface of the vacuum pump 50 is circular, the second section of the confluence hole 232 is also set to be circular. In some examples, the interface of the vacuum pump 50 can be inserted into the second section of the confluence hole 232, or the second section of the confluence hole 232 can be connected to the vacuum pump 50 through a pipeline. In other examples, the outer wall of the second cavity 20 is connected to an extension ring, the second section of the confluence hole 232 extends into the extension ring, and the extension ring is inserted into the interface of the vacuum pump 50.

[0086] In some examples, the second cavity 20 is further provided with a groove 24 communicating with the bearing space, the groove 24 is recessed in a direction away from the corresponding first cavity 10, and at least part of the groove 24 is located at the periphery of the bearing area 21. Exemplarily, the groove 24 is located at the periphery of the bearing area 21, and the notch of the groove 24 is located in the bearing space.

[0087] Specifically, one end of the airflow channel 23 is located in the groove 24, or in other words, the air holes 231 of the airflow channel 23 are connected to the groove 24. The shape of the groove 24 can be adapted to the distribution of the air holes 231. For example, when the air holes 231 are distributed along a preset circumference, the groove 24 can be in a circular ring shape.

[0088] In this example, by providing the groove 24 and connecting the air holes 231 of the airflow channel 23 with the groove 24, space can be provided for the air flow in the bearing space during vacuuming, which helps to ensure the vacuuming effect.

[0089] In addition, by providing the groove 24, when the pre-positioned lens 80 and the functional film material 90 are placed in the carrying area 21, the lens 80 and the functional film material 90 cannot cover the groove 24 to avoid blocking the air vent 231. In this way, the groove 24 can serve as a reminder of the placement position of the lens 80 and the functional film material 90 on the carrying area 21.

[0090] Figure 8 This is a schematic diagram of the application of applying a film to a lens 80 with a convex surface by using the film applying device provided in one embodiment of the present application. Figure 8 The first picture on the left is a schematic diagram of the three-dimensional structure. Figure 8 The two pictures on the right are schematic diagrams of the cross-section structure. Figure 8 The film pasting process is explained with an example.

[0091] In this embodiment, when the bonding surface of the lens 80 is a convex surface protruding toward the functional film material 90, as shown in FIG. Figure 8 As shown in the first figure on the left, during the docking process between the first cavity 10 and the second cavity 20, when the distance between the first cavity 10 and the second cavity 20 is reduced to a certain extent, the flexible film layer 30 can contact the functional film material 90 on the upper side of the lens 80. As the distance between the first cavity 10 and the second cavity 20 continues to decrease, the flexible film layer 30 can be deformed and generate a force under the action of the lens 80 and the functional film material 90. The force acts on the functional film material 90 to squeeze the functional film material 90, so that the functional film material 90 gradually becomes a convex surface that matches the fitting surface of the lens 80. Figure 8 As shown in the second figure on the left, after the first cavity 10 and the second cavity 20 are docked in place, the vacuum pump 50 is controlled to start and the bearing space surrounded by the flexible film layer 30 and the second cavity 20 is evacuated through the air flow channel 23, so that a pressure difference is formed between the space above the flexible film layer 30 and the space below the flexible film layer 30, so that the flexible film layer 30 shrinks and further squeezes the functional film material 90, and the air between the functional film material 90 and the lens 80 is discharged, as shown in FIG. Figure 8 The rightmost diagram in the figure makes the functional film 90 fit tightly with the lens 80, which can further improve the problem of film wrinkles and film edge warping.

[0092] Please refer to Fig. 9 In some embodiments, when the bonding surface of the lens 80 is a concave surface that is recessed away from the functional film material 90, a relief groove 25 is provided at one end of the second cavity 20 that faces the first cavity 10. The relief groove 25 is at least partially located in the bearing area 21. The shape of the relief groove 25 matches the shape of the bonding surface of the lens 80 so that the lens 80 and the functional film material 90 can be reliably positioned to ensure the effect of the film layer. Exemplarily, the relief groove 25 is located in the bearing area 21, or the part of the second cavity 20 located in the bearing area 21 is provided with the relief groove 25 to prevent the lens 80 and the functional film material 90 placed in the relief groove 25 from blocking the airflow channel 23 outside the bearing area 21.

[0093] Please refer to Fig.10 In some examples, a positioning film layer 92 is disposed on the side of the functional film material 90 away from the lens 80, and the ductility of the positioning film layer 92 in the bearing area 21 is higher than that of the functional film material 90. The positioning film layer 92 is used to further position the lens 80 and the functional film material in the bearing space.

[0094] The positioning film layer 92 and the functional film material 90 can be bonded and fixed. After the functional film material 90 and the lens 80 are bonded and fixed, the positioning film layer 92 needs to be removed from the functional film material 90. The bonding material between the positioning film layer 92 and the functional film material 90 may be different from the material used for the bonding layer 91. The bonding material between the positioning film layer 92 and the functional film material 90 needs to be able to bond and fix the positioning film layer 92 and the functional film material 90, and after the bonding layer 91 is cured to bond and fix the functional film material 90 and the lens 80, it is also easy to remove the positioning film layer 92 from the functional film material 90. In addition, when there are multiple functional film materials 90, the positioning film layer 92 is set on the functional film material 90 farthest from the lens 80 and on the side of the functional film material 90 away from the lens 80.

[0095] The positioning film layer 92 may be specifically made of release paper. The positioning film layer 92 may be made of a transparent material having a higher ductility than the functional film material 90. Thus, since the positioning film layer 92 has a relatively large ductility, in the process of the functional film material 90 changing from a flat surface to a curved surface, the positioning film layer 92 may deform before the functional film material 90, thereby reducing the stretching amount of the functional film material 90.

[0096] The thickness of the positioning film layer 92 may be greater than or equal to 0.1 mm and less than or equal to 0.2 mm. The size of the positioning film layer 92 may be greater than the size of the functional film material 90 , which is conducive to the cooperation between the positioning film layer 92 and the second cavity 20 .

[0097] Please refer to Fig.11 and Fig.12For example, the positioning film layer 92 may include: a positioning main body 921 and a positioning ear 922 connected to each other. The shape and size of the positioning main body 921 may be adapted to the shape and size of the functional film material 90. For example, when the functional film material 90 is circular, the positioning main body 921 is also circular, and the diameter of the positioning main body 921 may be equal to the diameter of the functional film material 90.

[0098] The positioning lugs 922 may include one or more. When there are multiple positioning lugs 922, the positioning effect of the functional film material 90 is better, and this embodiment will be described as an example. Multiple positioning lugs 922 are spaced and evenly distributed along the periphery of the positioning main body 921. The positioning lugs 922 are provided with through holes 92a. 92a is used to fix the positioning film layer 92 to the second cavity 20.

[0099] In other examples, the positioning film layer 92 may include a positioning main body 921, the shape of the positioning main body 921 may be adapted to the shape of the functional film material 90, and the size of the positioning main body 921 is larger than the size of the functional film material 90. For example, when the functional film material 90 is circular, the positioning main body 921 is also circular, and the diameter of the positioning main body 921 may be larger than the diameter of the functional film material 90. In this way, a portion of the positioning main body 921 can extend out of the functional film material 90, and the portion of the positioning main body 921 extending out of the functional film material 90 may be provided with a through hole 92a.

[0100] like Fig. 9 and Fig.13 As shown, at least one positioning portion 26 is provided at one end of the second cavity 20 facing the first cavity 10, and the positioning portion 26 can be located in the docking area 22. The shape of the positioning portion 26 is adapted to the shape of the through hole 92a provided in the positioning film layer 92, the number of the positioning portions 26 can be equal to the number of the through holes 92a provided in the positioning film layer 92, and the distribution of the positioning portions 26 is also adapted to the distribution of the through holes 92a.

[0101] Exemplarily, the positioning portion 26 may be columnar. For example, the positioning portion 26 may be cylindrical, and the through hole 92a provided in the positioning film layer 92 may be a circular hole. For another example, the positioning portion 26 may be prism-shaped, and the through hole 92a provided in the positioning film layer 92 may be a polygonal hole. In other examples, the positioning portion 26 may also be conical or hemispherical. In addition, the size of the positioning portion 26 may be set according to actual needs. Taking the positioning portion 26 as a cylindrical shape as an example, the diameter of the positioning portion 26 may be slightly smaller than the diameter of the through hole 92a, so that the positioning portion 26 can be smoothly matched with the through hole 92a.

[0102] There are at least three positioning parts 26 , and the size of the positioning parts 26 along the up-down direction can be greater than or equal to 0.5 mm, so as to ensure the positioning reliability.

[0103] The first cavity 10 is provided with a positioning hole 10a that matches the positioning portion 26 of the bearing area 21 on the docking surface 13 facing the second cavity 20, so that when the second cavity 20 is docked with the first cavity 10, the positioning portion 26 can be inserted into the positioning hole 10a to prevent the gap between the first cavity 10 and the second cavity 20 from affecting the vacuuming effect of the bearing space. The shape of the positioning hole 10a is adapted to the shape of the positioning portion 26, the number of the positioning holes 10a can be equal to the number of the positioning portions 26, and the distribution of the positioning holes 10a is also adapted to the distribution of the positioning portions 26.

[0104] Fig.14 The following is a schematic diagram of the application of applying a film to a lens 80 with a concave surface by using the film applying device provided in one embodiment of the present application.

[0105] When the bonding surface of the lens 80 is a concave surface away from the functional film material 90, the positioning film layer 92, the functional film material 90 and the lens 80 need to be positioned first; Fig.14 As shown in the first figure on the left, the positioned lens 80, the functional film material 90 and the positioning film layer 92 are placed in the bearing space, and the lens 80 is located in the avoidance groove 25, so that the positioning portion 26 on the second cavity 20 is matched with the through hole 92a on the positioning film layer 92; then the first cavity 10 is docked with the second cavity 20, as shown in FIG. Fig.14 As shown in the second figure on the left, the positioning portion 26 on the second cavity 20 is matched with the positioning hole 10 a on the first cavity 10 .

[0106] After the first cavity 10 and the second cavity 20 are docked in place, the vacuum pump 50 is controlled to start and vacuum the bearing space surrounded by the flexible film layer 30 and the second cavity 20, so that a pressure difference is formed between the space above the flexible film layer 30 and the space below the flexible film layer 30. The flexible film layer 30 will shrink and squeeze the functional film material 90, and exhaust the air between the functional film material 90 and the lens 80, so that the functional film material 90 gradually becomes a concave surface that matches the bonding surface of the lens 80, until the functional film material 90 and the lens 80 are tightly bonded, which can effectively improve the problem of film wrinkles and film edge warping. After maintaining the pressure for a certain period of time, the lighting module 40 is controlled to start and irradiate so that the adhesive layer 91 ( Figure 5 or Figure 6 The photoinitiator in the functional film 90 reacts to bond and fix the functional film 90 to the lens 80. Finally, the positioning film layer 92 is removed from the functional film 90, specifically, the positioning film layer 92 can be torn off from the functional film 90, or the positioning film layer 92 can be removed from the functional film 90 in other ways.

[0107] This embodiment also provides a film pasting method, which can be implemented based on the film pasting device provided in the above embodiment. The specific structure and function of the film pasting device will not be described in detail in this embodiment. In addition, the implementation process of this embodiment is the same as that of the above embodiment, which will not be described in detail.

[0108] Please refer to Fig.15 As shown, the film attaching method provided in this embodiment includes:

[0109] S101, placing the pre-positioned lenses and functional film materials in the bearing area of ​​the second cavity of the film laminating equipment;

[0110] S102, docking the first cavity of the film laminating equipment with the second cavity, so that the flexible film layer disposed at the open end of the first cavity squeezes the functional film material, so that the functional film material is laminated to the lens;

[0111] S103, turning on the illumination module of the film laminating equipment to solidify the adhesive layer between the functional film material and the lens under the illumination of the illumination module, thereby bonding and fixing the functional film material and the lens.

[0112] like Figure 4 As shown, before step S101, it also includes: pre-positioning the lens 80 and the functional film material 90. Exemplarily, when the bonding surface of the lens 80 is a convex surface protruding toward the functional film material 90, the functional film material 90 can be pre-bonded to the lens 80 by a robot or other tooling, so that the relative position of the functional film material 90 and the lens 80 meets the requirements. For example, the central area of ​​the lens 80 is pre-bonded with the central area of ​​the functional film material 90, so that the center of the functional film material 90 corresponds to the center of the lens 80. After pre-bonding, there is no need to use a roller or a pressing head for pressing, and the edge of the functional film material 90 is in a raised state relative to the lens 80. Before pre-bonding, as Figure 5 and Figure 6 As shown, an adhesive layer 91 is provided on the surface of the functional film 90 facing the lens 80 , and an adhesive layer 91 is provided on the surface of one of the adjacent functional films 90 . At this time, the adhesive layer 91 is not irradiated by the illumination module 40 .

[0113] When the bonding surface of the lens 80 is a concave surface away from the functional film material 90 (not shown in the figure), the functional film material 90 can be pre-bonded to the lens 80 by a robot or other tooling, so that the relative position of the functional film material 90 and the lens 80 meets the requirements. When the functional film material 90 is pre-bonded to the lens 80, the edge of the functional film material 90 and the lens 80 can be pre-bonded. In addition, before pre-bonding, an adhesive layer 91 needs to be set on the surface of the functional film material 90 facing the lens 80, and an adhesive layer 91 needs to be set on the surface of one of the adjacent functional film materials 90. At this time, the adhesive layer 91 is not irradiated by the light module 40.

[0114] Among them, in order to improve the positioning reliability of the lens 80 with a concave bonding surface, a positioning film layer 92 can be set on the side of the functional film material 90 away from the lens 80. In this way, in the pre-positioning process, the positioning film layer 92 needs to be pre-bonded to the functional film material 90 by a robot or other tooling, so that the relative position of the functional film material 90 and the positioning film layer 92 meets the requirements. Exemplarily, the relative position between the positioning film layer 92, the functional film material 90, and the lens 80 meets the requirements, which may include: the centers of the positioning film layer 92, the functional film material 90, and the lens 80 correspond to each other. In addition, a bonding structure made of other bonding materials is set on the surface of the positioning film layer 92 facing the functional film material 90, so as to facilitate the subsequent removal of the positioning film layer 92.

[0115] In step S101, Figure 4 or Figure 8 As shown, when the fitting surface of the lens 80 is a convex surface protruding toward the functional film material 90, the pre-positioned lens 80 and the functional film material 90 are placed in the bearing area 21 of the second cavity 20. At this time, the surface of the bearing area 21 facing the first cavity 10 can be a plane, a convex surface, or a concave surface.

[0116] like Fig.14 As shown, when the bonding surface of the lens 80 is a concave surface away from the functional film material 90, the pre-positioned lens 80, the functional film material 90 and the positioning film layer 92 are placed in the avoidance groove 25 located in the bearing area 21 of the second cavity 20, and the through hole 92a opened in the positioning film layer 92 can cooperate with the positioning portion 26 on the second cavity 20. In other examples, the portion of the second cavity 20 located in the bearing area may not be provided with an avoidance groove, and the second cavity may not be provided with a positioning portion, and the lens 80 and the second cavity 20 may be relatively fixed by other means.

[0117] In step S102 , the flexible film layer 30 can be deformed under the action of external force, and the force generated by the deformation can act on the functional film material 90 to squeeze the functional film material 90 , so that the functional film material 90 gradually becomes a curved surface that matches the fitting surface of the lens 80 .

[0118] like Figure 4 or Figure 8As shown, when the bonding surface of the lens 80 is a convex surface protruding toward the functional film material 90, in the pre-positioned functional film material 90 and the lens 80, the edge of the functional film material 90 is in a warped state relative to the lens 80. During the docking process, when the distance between the first cavity 10 and the second cavity 20 is reduced to a certain extent, the flexible film layer 30 can contact the functional film material 90 on the upper side of the lens 80. As the distance between the first cavity 10 and the second cavity 20 continues to decrease, the flexible film layer 30 can be deformed and generate a force under the action of the lens 80 and the functional film material 90. The force acts on the functional film material 90 to squeeze the functional film material 90, so that the functional film material 90 gradually becomes a convex surface adapted to the bonding surface of the lens 80, until the functional film material 90 and the lens 80 are completely bonded.

[0119] like Fig.14 As shown, when the fitting surface of the lens 80 is a concave surface that is recessed away from the functional film material 90, during the docking process, it is necessary to make the positioning hole 10a on the first cavity 10 and the part of the positioning portion 26 on the second cavity 20 that extends out of the through hole 92a cooperate; after docking in place, the flexible film layer 30 can deform and generate a force under the force generated by the upper and lower pressure differences, and the force acts on the functional film material 90 to squeeze the functional film material 90, so that the functional film material 90 gradually becomes a concave surface that matches the fitting surface of the lens 80, until the functional film material 90 is completely fitted with the lens 80. In other examples, the flexible film layer 30 can also deform and generate a force under the force applied by other structural members.

[0120] In step S103, after the functional film material 90 and the lens 80 are bonded and the flexible film layer 30 is kept squeezed for a certain period of time, the illumination module 40 can be started so that the light emitted by the illumination module 40 can irradiate the photoinitiator in the adhesive layer 91, thereby curing the adhesive layer 91 and bonding and fixing the functional film material 90 and the lens 80.

[0121] The film laminating method provided in this embodiment is to place the pre-positioned lens 80 and the functional film material 90 on the bearing area 21 of the second cavity 20 of the film laminating device, dock the first cavity 10 of the film laminating device in the bearing area 21 with the second cavity 20, so that the flexible film layer 30 arranged at the open end of the first cavity 10 and the second cavity 20 enclose a bearing space, so that the flexible film layer 30 squeezes the functional film material 90 in the bearing space, so that the functional film material 90 and the lens 80 are laminated, and the lighting module 40 of the film laminating device in the bearing area 21 is turned on, so that the adhesive layer 91 between the functional film material 90 and the lens 80 is cured under the illumination of the lighting module 40 in the bearing area 21, and the functional film material 90 and the lens 80 are bonded and fixed. In this way, the curved film layer can be realized without hot bending, avoiding the problems of high difficulty in precision control caused by the rebound phenomenon after hot bending, poor surface matching of the functional film material 90 and the lens 80, etc., which is not only easy to realize, but also conducive to improving the product yield and reducing the process difficulty of curved laminating.

[0122] Please refer to Fig.16 As shown, this embodiment also provides a film pasting method, including:

[0123] S201, placing the pre-positioned lens and functional film material in the bearing area of ​​the second cavity of the film laminating equipment;

[0124] S202, docking the first cavity and the second cavity of the film laminating equipment, so that the flexible film layer disposed at the open end of the first cavity and the second cavity enclose a bearing space, turning on the vacuum pump of the film laminating equipment, and allowing the vacuum pump to evacuate the bearing space through the air flow channel opened in the second cavity, so that the flexible film layer squeezes the functional film material in the bearing space, so that the functional film material and the lens are laminated;

[0125] S203, turning on the illumination module of the film laminating equipment, so that the adhesive layer between the functional film material and the lens is cured under the illumination of the illumination module, and the functional film material and the lens are bonded and fixed.

[0126] The implementation process of step S201 and step S203 may be the same as the implementation process of step S101 and step S103, which will not be described in detail in this embodiment. In addition, the implementation process of step S202 is the same as the implementation process of step S102, which will not be described in detail in this embodiment.

[0127] In step S202, if Figure 8As shown, after the first cavity 10 of the film-laminating equipment in the bearing area 21 is docked with the second cavity 20, when the bonding surface of the lens 80 is a convex surface protruding toward the functional film material 90, during the docking process of the first cavity 10 and the second cavity 20, as the distance between the first cavity 10 and the second cavity 20 continues to decrease, the flexible film layer 30 can be deformed and generate a force under the action of the lens 80 and the functional film material 90, and the force acts on the functional film material 90 to squeeze the functional film material 90, so that the functional film material 90 gradually becomes a convex surface that matches the bonding surface of the lens 80. After the first cavity 10 and the second cavity 20 are docked in place, the vacuum pump 50 is controlled to start and the bearing space enclosed by the flexible film layer 30 and the second cavity 20 is evacuated, so that a pressure difference is formed between the space above the flexible film layer 30 and the space below the flexible film layer 30, so that the flexible film layer 30 shrinks and further squeezes the functional film material 90, and the air between the functional film material 90 and the lens 80 is discharged, so that the functional film material 90 and the lens 80 are tightly fitted, which can further improve the problems of film wrinkles and warping of the film edges.

[0128] like Fig.14 As shown, when the fitting surface of the lens 80 is a concave surface that is recessed away from the functional film material 90, after the first cavity 10 and the second cavity 20 are docked in place, the vacuum pump 50 is controlled to start and the bearing space enclosed by the flexible film layer 30 and the second cavity 20 is evacuated, so that a pressure difference is formed between the space above the flexible film layer 30 and the space below the flexible film layer 30, and the flexible film layer 30 will shrink and squeeze the functional film material 90, and discharge the air between the functional film material 90 and the lens 80, so that the functional film material 90 gradually becomes a concave surface that matches the fitting surface of the lens 80, until the functional film material 90 and the lens 80 are tightly fitted, which can effectively improve the problems of film wrinkles and film edge warping.

[0129] When the fitting surface of the lens 80 is a concave surface away from the functional film material 90, the lens 80 needs to cooperate with the avoidance groove 25 on the second cavity 20, and the positioning film layer 92 needs to cooperate with the second cavity 20 to improve the positioning reliability. The following is an example of the case where the fitting surface of the lens 80 is a concave surface.

[0130] In step S101 or step S201, the pre-positioned lens 80, functional film material 90 and positioning film layer 92 can be placed in the avoidance groove 25 of the bearing area 21 of the second cavity 20 of the film laminating equipment, and the through hole 92a on the positioning film layer 92 is matched with the positioning part 26 set on the second cavity 20.

[0131] In step S102 or step S202, during docking, and before the flexible membrane layer at the open end of the first cavity of the bearing area 21 and the second cavity of the bearing area 21 enclose a bearing space, the method further includes:

[0132] The first cavity of the film laminating device in the carrying area 21 is placed on the second cavity, and the positioning hole opened in the first cavity of the carrying area 21 can cooperate with the part of the positioning portion extending out of the through hole of the carrying area 21.

[0133] After step S103 or step S203, the method further includes:

[0134] The positioning film layer in the carrying area 21 is removed from the functional film material in the carrying area 21 .

[0135] The following is an example of the implementation process of the film pasting device and the film pasting method provided in this embodiment.

[0136] 1) Please refer to Figures 1 to 6 , when the laminating surface of the lens 80 is a convex surface protruding toward the functional film material 90, and the laminating equipment is not provided with a vacuum pump 50:

[0137] Pre-position the lens 80 and the functional film material 90, and place the pre-positioned lens 80 and the functional film material 90 on the bearing area 21 of the second cavity 20, at which point the edge of the functional film material 90 is in a raised state relative to the lens 80;

[0138] The first cavity 10 is docked with the second cavity 20. During this process, when the distance between the first cavity 10 and the second cavity 20 is reduced to a certain extent, the flexible film layer 30 can contact the functional film material 90 on the upper side of the lens 80. As the distance between the first cavity 10 and the second cavity 20 continues to decrease, the flexible film layer 30 can be deformed and generate tension under the squeezing action of the lens 80 and the functional film material 90. The tension acts on the functional film material 90 to squeeze the functional film material 90, so that the functional film material 90 gradually becomes a convex surface that matches the bonding surface of the lens 80, until the functional film material 90 is completely bonded with the lens 80. After the first cavity 10 and the second cavity 20 are docked in place, that is, after the second cavity 20 and the flexible film layer 30 enclose a closed space, they are maintained for a preset time, which can be greater than or equal to 5 seconds;

[0139] After the holding time reaches the preset time, the illumination module 40 is controlled to be turned on, and the light emitted by the illumination module 40 can irradiate the photoinitiator in the adhesive layer 91 , and the adhesive layer 91 is cured to bond and fix the functional film material 90 to the lens 80 .

[0140] 2) Please refer to Figures 7 and 8 , when the laminating surface of the lens 80 is a convex surface protruding toward the functional film material 90, and the laminating equipment is provided with a vacuum pump 50:

[0141] Pre-position the lens 80 and the functional film material 90, and place the pre-positioned lens 80 and the functional film material 90 in the carrying area 21 of the second cavity 20, at which time, the edge of the functional film material 90 is in a warped state relative to the lens 80;

[0142] The first cavity 10 is connected to the second cavity 20. During this process, when the distance between the first cavity 10 and the second cavity 20 is reduced to a certain extent, the flexible film layer 30 can contact the functional film material 90 on the upper side of the lens 80. As the distance between the first cavity 10 and the second cavity 20 continues to decrease, the flexible film layer 30 can be deformed and generate tension under the squeezing action of the lens 80 and the functional film material 90. The tension acts on the functional film material 90 to squeeze the functional film material 90, so that the functional film material 90 gradually becomes a convex surface adapted to the fitting surface of the lens 80.

[0143] After the first cavity 10 and the second cavity 20 are docked in place, the vacuum pump 50 is controlled to start and vacuumize the bearing space surrounded by the flexible film layer 30 and the second cavity 20, so that a pressure difference is formed between the space above the flexible film layer 30 and the space below the flexible film layer 30, so that the flexible film layer 30 shrinks and further squeezes the functional film material 90, and the air between the functional film material 90 and the lens 80 is exhausted, so that the functional film material 90 and the lens 80 are closely attached. After vacuuming, the preset time is maintained, and the preset time can be greater than or equal to 5 seconds;

[0144] After the holding time reaches the preset time, the illumination module 40 is controlled to be turned on, and the light emitted by the illumination module 40 can irradiate the photoinitiator in the adhesive layer 91 , and the adhesive layer 91 is cured to bond and fix the functional film material 90 to the lens 80 .

[0145] 3) Please refer to Figures 9 to 14 When the laminating surface of the lens 80 is a concave surface away from the functional film material 90, and the laminating equipment is provided with a vacuum pump 50:

[0146] Pre-position the positioning film layer 92, the functional film material 90, and the lens 80, and place the pre-positioned lens 80, the functional film material 90, and the positioning film layer 92 into the avoidance groove 25 of the bearing area 21 of the second cavity 20, and make the through hole 92a on the positioning film layer 92 cooperate with the positioning part 26 set on the second cavity 20, at this time, the functional film material 90 and the positioning film layer 92 are in a plane state;

[0147] The first cavity 10 and the second cavity 20 are docked. Specifically, the first cavity 10 of the film laminating device in the bearing area 21 can be placed on the second cavity 20, and the positioning hole 10a opened in the first cavity 10 is aligned with the part of the positioning portion 26 extending out of the through hole 92a of the bearing area 21. When the positioning portion 26 is inserted into the positioning hole 10a and the positioning film layer 92 and the second cavity 20 form a relatively closed space, the first cavity 10 and the second cavity 20 are docked in place;

[0148] After the first cavity 10 and the second cavity 20 are docked in place, the vacuum pump 50 is controlled to start and vacuumize the bearing space surrounded by the flexible film layer 30 and the second cavity 20, so that a pressure difference is formed between the space above the flexible film layer 30 and the space below the flexible film layer 30, and the flexible film layer 30 will shrink and squeeze the functional film material 90, exhausting the air between the functional film material 90 and the lens 80, so that the functional film material 90 gradually becomes a concave surface adapted to the bonding surface of the lens 80, until the functional film material 90 and the lens 80 are tightly bonded, and after vacuuming, the preset time is maintained, and the preset time can be greater than or equal to 5 seconds;

[0149] After the holding time reaches the preset time, the illumination module 40 is controlled to be turned on, and the light emitted by the illumination module 40 can irradiate the photoinitiator in the adhesive layer 91, and the adhesive layer 91 is cured to bond and fix the functional film material 90 to the lens 80;

[0150] The positioning film layer 92 of the bearing region 21 is removed from the functional film material 90 .

[0151] The film pasting equipment and method provided in the present embodiment are not limited by the thickness and surface shape of the lens, have a wider range of applications, and can be applied to more scenarios; the present embodiment no longer needs to perform hot bending on the lens and the functional film material, which can avoid the rebound phenomenon after hot bending, can improve the preparation accuracy of the lens and the functional film material, and can improve the problems of wrinkles and edge warping of the functional film material; moreover, the present embodiment transmits the force to the functional film material evenly through the deformation of the flexible film layer, which is beneficial to reduce the stretching rate of the functional film material, so that the stress of the functional film material after bonding is relatively small, so that the optical axis of the optical module is basically unchanged, and the problems of wavy lines, orange peel and uncontrollable optical axis after stretching are improved.

[0152] It should be understood that the various steps described in the method embodiments of the present disclosure may be performed in different orders and / or in parallel. In addition, the method embodiments may include additional steps and / or omit the steps shown. The scope of the present disclosure is not limited in this respect.

[0153] The term "including" and its variations used herein are open inclusions, i.e., "including but not limited to". The term "based on" means "based at least in part on". The term "one embodiment" means "at least one embodiment"; the term "another embodiment" means "at least one additional embodiment"; the term "some embodiments" means "at least some embodiments". The relevant definitions of other terms will be given in the following description.

[0154] It should be noted that the concepts such as "first" and "second" mentioned in this application are only used to distinguish different devices, modules or units, and are not used to limit the order or interdependence of the functions performed by these devices, modules or units.

[0155] It should be noted that the modifications of "one" and "plurality" mentioned in the present application are illustrative rather than restrictive, and those skilled in the art should understand that unless otherwise clearly indicated in the context, it should be understood as "one or more".

[0156] The above are only specific implementations of the present application, but the protection scope of the present application is not limited thereto. Any person skilled in the art who is familiar with the present technical field can easily think of changes or substitutions within the technical scope disclosed in the present application, which should be included in the protection scope of the present application. Therefore, the protection scope of the present application should be based on the protection scope of the claims.

Claims

1. A film laminating device, characterized in that: include: a first cavity; A second cavity, wherein the second cavity can be docked with the first cavity, and the second cavity has a bearing area, and the bearing area is used to bear the pre-positioned lenses and functional film materials; A flexible film layer, the flexible film layer is arranged at the opening end of the first cavity, and the flexible film layer is used to deform under the action of an external force and squeeze the functional film material so that the functional film material fits the lens; A lighting module is used to illuminate the functional film material, so that the bonding layer between the functional film material and the lens is cured, thereby bonding and fixing the functional film material to the lens.

2. The film laminating device according to claim 1, characterized in that: When the first cavity and the second cavity are in a docking state, the flexible film layer and the second cavity can enclose a carrying space, and the lens and the functional film material carried by the carrying area are located in the carrying space; The second cavity is provided with an air flow channel, and the air flow channel is communicated with the bearing space; The film laminating equipment further includes: a vacuum pump, which is communicated with the air flow channel and is used to evacuate the bearing space.

3. The film sticking equipment according to claim 2, characterized in that: The air flow channel includes: air vents and confluence holes; Wherein, the vent hole is connected to the bearing space; the vent hole comprises a plurality of vent holes, and the plurality of vent holes are spaced and evenly distributed; The confluence hole is located at one end of the air holes away from the carrying space, and the confluence hole is used to connect the plurality of air holes with the vacuum pump.

4. The film laminating device according to claim 1, characterized in that: The second cavity is provided with a groove communicating with the bearing space at one end thereof facing the first cavity, and at least a part of the groove is located at the periphery of the bearing area; Wherein, the bearing space is enclosed by the flexible membrane layer and the second cavity; The bearing area is an area where the orthographic projections of the lens and the functional film material on the end surface of the second cavity facing the opposite end are located.

5. The film sticking equipment according to claim 4, characterized in that: One end of the air flow channel communicated with the vacuum pump is communicated with the groove.

6. The film laminating device according to claim 1, characterized in that: The illumination module is disposed in the first cavity or in the second cavity; Alternatively, the illumination area of ​​the illumination module at least covers the bearing area; Alternatively, the illumination module includes an ultraviolet light illumination module.

7. The film sticking equipment according to claim 1, characterized in that: When the first cavity and the second cavity are in a docking state, a portion of the flexible film layer is sandwiched between the docking surface of the first cavity and the docking area of ​​the second cavity; wherein the docking area of ​​the second cavity is located outside the bearing area.

8. The film sticking equipment according to claim 1, characterized in that: An avoidance groove is provided at one end of the second cavity facing the first cavity opposite thereto, and at least a part of the avoidance groove is located in the bearing area, and the shape of the avoidance groove is adapted to the shape of the lens; wherein the lens is recessed in a direction away from the functional film material.

9. The film-sticking equipment according to claim 8, characterized in that: The second cavity further has a docking area at one end facing the first cavity, and the docking area is located at the periphery of the bearing area; The second cavity is provided with at least one positioning portion extending toward the first cavity, and the positioning portion is located in the docking area; A positioning hole matching with the positioning portion is provided in a docking area of ​​the first cavity toward the second cavity; Among them, a positioning film layer is provided on the side of the functional film material facing away from the lens, the ductility of the positioning film layer is higher than the ductility of the functional film material, the positioning film layer is provided with a through hole cooperating with the positioning part, and the through hole is located in the part of the positioning film layer extending out of the functional film material along the direction perpendicular to its thickness.

10. The film sticking equipment according to claim 1, characterized in that: The functional film materials include a plurality of functional film materials, and two adjacent functional film materials are bonded and fixed by the bonding layer; Wherein, the functional film material includes at least one of the following: a polarizing film layer, a reflective film layer, and a quarter wave plate.

11. A film pasting method, characterized in that: include: Placing the pre-positioned lenses and functional film materials in the bearing area of ​​the second cavity of the film laminating equipment; The first cavity of the film laminating device is connected to the second cavity, so that the flexible film layer disposed at the open end of the first cavity presses the functional film material, so that the functional film material is laminated to the lens; The illumination module of the film sticking equipment is turned on to solidify the adhesive layer between the functional film material and the lens under the illumination of the illumination module, so that the functional film material and the lens are bonded and fixed.

12. The film attaching method according to claim 11, characterized in that: After the first cavity of the film sticking equipment is docked with the second cavity, the method further includes: Turn on the vacuum pump of the film-sticking equipment, so that the vacuum pump can evacuate the carrying space through the air flow channel opened in the second cavity; wherein, when the first cavity and the second cavity are in a docking state, the flexible film layer can enclose the carrying space with the second cavity, and the lenses and functional film materials carried by the carrying area are located in the carrying space.

13. The film attaching method according to claim 11, characterized in that: When the laminating surface of the lens is a concave surface away from the functional film material: Placing the pre-positioned lens and functional film material in the bearing area of ​​the second cavity of the film laminating device includes: The pre-positioned lens, functional film material and positioning film layer are placed in the avoidance groove of the second cavity of the film laminating device, so that the through hole opened in the positioning film layer cooperates with the positioning part set on the second cavity; wherein the positioning film layer is located on the side of the functional film material away from the lens; The step of docking the first cavity of the film attaching device with the second cavity includes: Placing the first cavity of the film attaching device on the second cavity so that the positioning hole opened in the first cavity matches with the portion of the positioning portion extending out of the through hole; After the functional film material is bonded and fixed to the lens, the method further comprises: The positioning film layer is removed from the functional film material.

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