CN114987830A

CN114987830A - Laminating method

Info

Publication number: CN114987830A
Application number: CN202111113878.2A
Authority: CN
Inventors: 周永山; 张玉军; 韩立志; 袁高
Original assignee: Honor Device Co Ltd
Current assignee: Honor Device Co Ltd
Priority date: 2021-09-23
Filing date: 2021-09-23
Publication date: 2022-09-02
Anticipated expiration: 2041-09-23
Also published as: CN114987830B

Abstract

The application relates to the field of processing, in particular to a laminating method for laminating a composite film and a light-emitting display layer. The attaching method comprises the following steps: the suction nozzle adsorbs the edge area of the planar composite film, so that the edge area of the composite film is not contacted with the curved edge area of the luminous display layer; the pressing piece presses the middle area of the composite film along the pressing direction, so that the pressed part of the middle area of the composite film by the pressing piece is attached to the planar middle area of the light-emitting display layer; the suction nozzle is switched from a suction state to a blowing state, and the suction nozzle blows the edge area of the composite film in the blowing state so as to enable the edge area of the composite film to be attached to the edge area of the light-emitting display layer. The method can realize the attachment of the composite film and the edge of the light-emitting display layer, and ensure the attachment quality.

Description

Laminating method

Technical Field

The application relates to the technical field of processing, in particular to a laminating method for laminating a composite film and a light-emitting display layer.

Background

In electronic devices, with the continuous development of display technologies, curved display screens are increasingly applied more widely, for example, to display devices such as mobile phones and flat panels, so as to implement display of 3D forms of the display devices. The display in the 3D form can realize the front display and the side display of the electronic equipment, thereby increasing the display area and realizing the frameless display.

Generally, the composite film is attached to one side, back to the cover plate of the electronic device, of the light-emitting display layer of the curved-surface display screen, and the composite film can play roles in protecting the light-emitting display layer, preventing static electricity and the like. Because the composite film is attached to the light-emitting display layer, the composite film and the light-emitting display layer are easy to generate air bubbles, virtual attachment and other defects in the attaching process, and the product yield is low.

Disclosure of Invention

Embodiments of the present application provide a method for attaching a composite film in an electronic device to a light emitting display layer in a curved screen. The application of the fit process includes an edge profiling stage and an edge purging stage. In the edge profiling stage, the edges of the composite film and the light-emitting display layer cannot seal bubbles; in the edge purging stage, the edge of the composite film is purged to realize the attachment of the edge of the composite film and the edge of the luminous display layer, so that the attachment quality is ensured.

In order to achieve the above purpose, the embodiment of the present application adopts the following technical solutions:

in a first aspect, the present application provides a bonding method for bonding a composite film (e.g., a composite metal film) to a light-emitting display layer, the bonding method comprising: providing a suction nozzle in a suction state, wherein the suction nozzle adsorbs the edge area of the planar composite film, so that the edge area of the composite film is not contacted with the curved edge area of the luminous display layer; providing a pressing piece (such as a pressing pad or a roller), wherein the pressing piece presses the middle area of the composite film along the pressing direction, so that the pressed part of the middle area of the composite film by the pressing piece is attached to the planar middle area of the light-emitting display layer, and the edge area of the composite film is preliminarily molded with the edge area of the light-emitting display layer; the suction nozzle is switched from a suction state to a blowing state, and the suction nozzle sweeps the edge area of the composite film in the blowing state so as to enable the edge area of the composite film to be attached to the edge area of the light-emitting display layer.

According to the embodiment of the application, the edge area of the composite film is adsorbed by the suction nozzle, and under the pressing effect of the pressing piece, the edge area of the composite film is preliminarily copied with the edge area of the light-emitting display layer. The method belongs to the edge profiling stage of the composite film, at the moment, the edge area of the composite film is not attached to the edge area of the light-emitting display layer and is not in contact with the edge area of the light-emitting display layer, and air bubbles cannot be sealed between the edge area of the composite film and the edge area of the light-emitting display layer. After the preliminary profile modeling of the edge area of the composite film and the edge area of the luminous display layer is finished, the suction nozzle blows the edge area of the composite film again, so that the middle area of the composite film is attached to the middle area of the luminous display layer, and the attachment quality is guaranteed. After the edge purging stage of the composite film is completed, the middle area of the composite film is attached to the middle area of the light-emitting display layer, and at the moment, the edge area of the composite film is in profile modeling with the edge area of the light-emitting display layer. That is, after the edge region of the composite film is pressed onto the edge region of the light emitting display layer, the same configuration as the edge region of the light emitting display layer is formed. That is, the edge region of the composite film is completely contoured with the edge region of the light-emitting display layer.

That is, the "preliminary profiling" of the edge profiling stage of the composite film is not completely profiled, but rather has some degree of profiling, with respect to the "complete profiling" of the edge purging stage of the composite film. For example, in the "preliminary profiling" stage, the edge region of the luminescent display layer takes a curved form, and the angle of curvature of the edge region of the luminescent display layer is, for example, 60 °; the edge region of the composite film is also in a bent form, the bent angle of the edge region of the composite film is smaller than that of the edge region of the light-emitting display layer, and the bent angle of the edge region of the composite film is, for example, 50 °. In the "fully conformal" stage, the bend angle of the edge region of the composite film is the same as the bend angle of the edge region of the light-emitting display layer, i.e. the bend angle of the edge region of the composite film is 60 °.

In one possible implementation of the first aspect, the process of the suction nozzle purging the edge area of the composite film in the blowing state includes: the suction nozzle sweeps the edge area of the composite film along the direction from the middle area of the light-emitting display layer to the edge area of the light-emitting display layer. Namely, the suction nozzle rotationally sweeps the edge area of the composite film, the rotational sweeping direction of the suction nozzle is carried out along the direction from the middle area of the luminous display layer to the edge area of the luminous display layer, so that the whole area of the edge area of the composite film, which naturally extends towards the extension direction under the action of unilateral air pressure, is tightly attached to the luminous display layer under the rotational sweeping action of the suction nozzle. In addition, bubbles between the edge area of the composite film and the edge area of the light-emitting display layer can be driven, and the generation of bubbles between the edge area of the composite film and the edge area of the light-emitting display layer can be improved. Therefore, the bonding quality of the composite film and the light-emitting display layer is improved.

Illustratively, the suction nozzle sweeps the edge region of the composite film along the bending direction of the edge region of the light-emitting display layer with the connection of the middle region of the light-emitting display layer and the edge region of the light-emitting display layer as a sweeping starting point.

In one possible implementation of the first aspect, the process of the suction nozzle purging the edge area of the composite film in the blowing state includes: the suction nozzle uses the connection position of the middle area of the light-emitting display layer and the edge area of the light-emitting display layer as a sweeping starting point to sweep the edge area of the composite film. The suction nozzle starts to rotate to blow the edge area of the composite film by taking the joint of the middle area of the luminous display layer and the edge area of the luminous display layer as a blowing starting point, so that the edge area of the composite film can be blown in an all-around mode, and the attaching quality of the edge area of the composite film and the edge area of the luminous display layer is improved.

In one possible implementation of the first aspect, the process of the suction nozzle purging the edge area of the composite film in the blowing state includes: the suction nozzle moves along an extending direction of an edge region of the light emitting display layer to purge the edge region of the composite film. Namely, the suction nozzle moves along the edge area of the composite film and sweeps the edge area of the composite film, and the whole area of the edge area of the composite film can be attached to the edge area of the composite film light-emitting display layer. Illustratively, one side of the composite film facing the light-emitting display layer is coated with a layer of foam rubber, and a part of the middle area of the composite film is attached to the planar middle area of the light-emitting display layer through the foam rubber.

In one possible implementation of the first aspect described above, the suction nozzle is moved back and forth along an extending direction of the edge area of the light emitting display layer to purge the edge area of the composite film a plurality of times. The suction nozzle sweeps the edge area of the composite film for many times, so that the edge area of the composite film can be tightly attached to the edge area of the light-emitting display layer. In some possible embodiments, a plurality of suction nozzles can be arranged in the edge area of the composite membrane, and the plurality of suction nozzles can complete the purging of the edge area of the composite membrane at one time without moving back and forth, so that the purging times are reduced.

In one possible implementation of the first aspect, before the suction nozzle is switched from the suction state to the blowing state, the pressing member is moved in a direction perpendicular to the pressing direction, so that the middle region of the composite film is attached to the middle region of the light emitting display layer. The pressfitting pad can expand from the centre to the periphery and remove for the middle zone of complex film and the middle zone laminating of luminous display layer have guaranteed the laminating quality. In some possible embodiments, the size of the pressing member is the same as or similar to the size of the middle region of the composite film, so that the pressing member may not move in the middle region of the composite film, that is, the middle region of the composite film may be attached to the middle region of the light-emitting display layer by pressing the middle region of the composite film once.

In one possible implementation of the first aspect, the edge region of the light emitting display layer includes: the display device comprises a first display layer curved surface area, a second display layer curved surface area, a third display layer curved surface area and a fourth display layer curved surface area, wherein adjacent display layer curved surface areas are connected through a corner double-folded area; the first display layer curved surface area and the third display layer curved surface area are arranged at intervals along a first direction (such as the width direction of a mobile phone) and respectively extend along a second direction (such as the length direction of the mobile phone), and the first direction is perpendicular to the second direction; the second display layer curved surface area and the fourth display layer curved surface area are arranged at intervals along the second direction and respectively extend along the first direction; the edge region of the composite film comprises: a first edge region, a second edge region, a third edge region and a fourth edge region, adjacent edge regions being connected by corner regions; the first edge area is attached to the first display layer curved surface area, the second edge area is attached to the second display layer curved surface area, the third edge area is attached to the third display layer curved surface area, the fourth edge area is attached to the fourth display layer curved surface area, and the corner area of the composite film is attached to the corner double-folded area of the light-emitting display layer.

In other words, the cover plate corresponding to the light-emitting display layer to which the composite film is bonded is a four-curved cover plate, and the light-emitting display layer bonded to the four-curved cover plate is in a four-curved shape.

In one possible implementation of the first aspect, the process of the suction nozzle purging the edge area of the composite film in the blowing state includes: the suction nozzle moves along the second direction to respectively purge the first edge area and the third edge area for one time or back and forth for multiple times; the suction nozzle is moved in a first direction to purge the second and fourth edge regions one or more times back and forth, respectively.

In one possible implementation of the first aspect described above, the overlap is purged in corner regions of the composite membrane during the nozzle purging the first edge region, the second edge region, the third edge region, and the fourth edge region. That is, when the suction nozzle sweeps the adjacent edge area, a certain overlap exists in the four corner areas of the composite film. Because the composite metal film has stronger plastic deformation resistance, the four corner areas of the composite film can be well attached due to the sweeping and overlapping of the suction nozzle, the four corner areas of the composite film can not be swept respectively in a targeted manner, and the sweeping frequency is reduced. In some possible embodiments, in order to ensure the purging effect, the four corner regions may be purged once after the suction nozzle purges the edge region.

In one possible implementation of the first aspect, the process of the suction nozzle purging the edge area of the composite film in the blowing state includes: the suction nozzles respectively sweep the corner areas of the composite membrane.

In some possible embodiments, the edge area or the four corner areas of the composite film are purged through the suction nozzle on the basis of pressing the middle area of the composite film by using the roller. The roller can only press the middle area of the composite film, and can further press the edge area of the composite film.

In one possible implementation of the first aspect, the edge region of the light emitting display layer includes: the display device comprises a first display layer curved surface area and a third display layer curved surface area which are arranged at intervals along a first direction, wherein the first display layer curved surface area and the third display layer curved surface area respectively extend along a second direction, and the first direction is vertical to the second direction; the edge region of the composite film comprises: a first edge region and a third edge region; the first edge area is attached to the first display layer curved surface area, and the third edge area is attached to the third display layer curved surface area; alternatively, the edge region of the light emitting display layer includes: the second display layer curved surface area and the fourth display layer curved surface area are arranged at intervals along the second direction, and the second display layer curved surface area and the fourth display layer curved surface area respectively extend along the first direction; the edge region of the composite film comprises: a second edge region and a fourth edge region; the second edge area is attached to the second display layer curved surface area, and the fourth edge area is attached to the fourth display layer curved surface area.

The light-emitting display layer is adhered to the double-curved-surface cover plate, and the edge area of the composite film is adhered to the curved-surface edge area of the double-curved-surface light-emitting display layer.

In one possible implementation of the first aspect, the process of the suction nozzle purging the edge area of the composite film in the blowing state includes: the suction nozzle moves along the second direction to respectively purge the first edge area and the third edge area for one time or back and forth for multiple times; alternatively, the suction nozzle is moved in the first direction to purge the second and fourth edge regions one or more times back and forth, respectively.

In one possible implementation of the first aspect, in the air suction state, the composite film, the light emitting display layer and the suction nozzle are in a vacuum cavity; in the blowing state, the vacuum environment of the vacuum cavity is released. The laminating operation is carried out in the vacuum cavity, so that the composite film can be attached to the luminous display layer more tightly and firmly under the action of the laminating piece, and the edge area of the composite film can extend to the extending direction naturally under the action of unilateral air pressure when the atmospheric pressure is released subsequently, thereby being beneficial to the attachment and the exhaust of the curved surface-shaped edge area.

In one possible implementation of the first aspect, the process of the suction nozzle purging the edge area of the composite film in the blowing state includes: the suction nozzle sweeps the edge area of the composite film at a set distance, a set angle, a set sweeping speed and a set gas flow rate, the set distance is the distance from the suction nozzle to the edge area of the composite film, and the set angle is the included angle between the suction nozzle and the pressing direction.

In a possible implementation of the first aspect described above, the set distance is between 0.5cm and 1.5 cm. The suction nozzle is within the set distance range from the edge area of the composite film, so that gas can be well pushed.

In a possible implementation of the first aspect, the set angle is adapted to a bending angle of an edge region of the light emitting display layer. And the edge area of the composite film is fully attached to all bent areas of the light-emitting display layer.

In one possible implementation of the first aspect described above, the set purge rate is between 0.2mm/s and 0.5 mm/s. Within this parameter range, the edge region of the composite film can be sufficiently attached to the edge region of the light-emitting display layer, and gas can be more favorably pushed up, preventing bubbles from being trapped between the composite film and the light-emitting display layer.

In one possible implementation of the first aspect, the set gas flow rate is between 100LPM and 500 LPM. This is advantageous for sufficient gas driving, so that the edge region of the composite film is well bonded to the edge region of the light-emitting display layer.

In a possible implementation of the first aspect described above, the suction nozzle purges the edge region of the composite membrane with a gas that is an inert gas. The inert gas is, for example, nitrogen. The inert gas is relatively stable and does not chemically react with the edge region of the composite membrane during purging of the edge region of the composite membrane.

In one possible implementation of the first aspect, the bend angle of the edge region of the light emitting display layer is 60 °;

the process that the suction nozzle sweeps the edge area of the composite membrane in a blowing state comprises the following steps:

in the first stage, the set angle in the first stage is between 0 ° and 20 °, the set purge speed is 0.5mm/s, and the set gas flow is 500 LPM;

in the second stage, the set angle is between 20 degrees and 40 degrees, the set purging speed is 0.2mm/s, and the set gas flow is 500 LPM;

in the third stage, the set angle is between 40 ° and 60 °, the set purge speed is 0.5mm/s, and the set gas flow is 500 LPM. The suction nozzle can fully carry out gas driving pressure by blowing nitrogen to the edge area of the composite film in stages, so that the edge area of the composite film is well attached to the edge area of the luminous display layer.

In one possible implementation of the first aspect, in the process of pressing the middle region of the composite film by the pressing member to attach the middle region of the composite film to the middle region of the light-emitting display layer: the pressing pressure of the pressing piece for pressing the middle area of the composite film is between 200kgf and 400 kgf; the pressing speed of the pressing piece for pressing the middle area of the composite film is between 3mm/s and 6 mm/s; the press remains for 2s to 6s after pressing the middle region of the composite membrane. Within the range of the pressing parameters, the middle area of the composite film and the middle area of the light-emitting display layer can be well attached.

Drawings

Fig. 1 illustrates a perspective view of a cover plate, according to some embodiments of the present application;

FIG. 2 illustrates a perspective view of a light emitting display layer, according to some embodiments of the present application;

fig. 3 illustrates a top view of a composite membrane, according to some embodiments of the present application;

FIG. 4 illustrates a first schematic view of a composite film conforming to a light emitting display layer, according to some embodiments of the present application;

FIG. 5 illustrates a flow chart for attaching a composite film to a light emitting display layer, according to some embodiments of the present application;

FIG. 6 illustrates a second schematic representation of the attachment of a composite film to a light emitting display layer, according to some embodiments of the present application;

FIG. 7 illustrates a third schematic representation of the attachment of a composite film to a light emitting display layer, according to some embodiments of the present application;

FIG. 8 illustrates a fourth schematic representation of the attachment of a composite film to a light-emitting display layer, according to some embodiments of the present application.

Detailed Description

Hereinafter, specific embodiments of the present application will be described in detail with reference to the accompanying drawings.

The application provides a bonding method for bonding a composite film and a light-emitting display layer in an electronic device. The application of the fit process includes an edge profiling stage and an edge purging stage. In the edge profiling stage, the edges of the composite film and the light-emitting display layer cannot seal bubbles; in the edge purging stage, the composite film is attached to the edge of the light-emitting display layer, and the attaching quality is guaranteed.

It can be understood that the technical solution of the present application can be applied to various electronic devices having a curved screen, for example, electronic devices including but not limited to tablet computers, mobile phones, smart wearable products, computers, and the like.

For convenience of description, the following description takes a mobile phone as an example of the electronic device.

In one possible embodiment, referring to fig. 1-4, the cell phone of the present application includes a light emitting display layer 10, a composite film 20, and a curved cover plate 30. The light-emitting display layer 10 is located between the curved cover plate 30 and the composite film 20, and is respectively attached to the curved cover plate 30 and the composite film 20 through glue layers. For example, the Cover plate is a hard screen, such as a CG (Cover Glass) Cover plate, and the CG Cover plate is made of inorganic Glass or organic Glass. In some possible embodiments, the cover is a flexible screen, and for example, the cover is made of flexible material such as ultra-thin glass (UTG) or transparent polyimide (CPI). The light emitting display layer 10 described above may be an Organic Light Emitting Diode (OLED) screen. After the light-emitting display layer 10 is attached to the cover plate 30, the light-emitting display layer 10 is similar to or the same as the cover plate 30, which will be described in detail below. The composite film 20 is, for example, a composite metal film, and can protect the light-emitting display layer 10 and prevent static electricity.

One possible bonding process for the light-emitting display layer 10, the composite film 20, and the curved cover plate 30 is described below.

Illustratively, as shown in fig. 1, the curved cover 30 to which the luminescent display layer 10 is to be attached is a four-curved cover. The four-curved-surface cover plate comprises a planar cover plate middle area 31 and a curved-surface cover plate edge area, and the curved-surface edge area of the four-curved-surface cover plate is arranged around the planar cover plate middle area 31 of the four-curved-surface cover plate. That is, the curved edge region of the four-curved cover is located around the flat cover middle region 31 of the four-curved cover. Illustratively, the planar cover middle region 31 of the four-curved cover has a rectangular shape including two long sides extending in the length direction (indicated by X direction in fig. 1) and two short sides extending in the width direction (indicated by Y direction in fig. 1). The curved cover plate edge region of the four-curved cover plate comprises: the first cover curved surface area 32, the second cover curved surface area 33, the third cover curved surface area 34 and the fourth cover curved surface area 35, and adjacent curved surface areas are connected through a corner double-folded area.

The first cover curved surface area 32 and the third cover curved surface area 34 are arranged at intervals along the width direction of the mobile phone, and the first cover curved surface area 32 and the third cover curved surface area 34 respectively extend along the length direction of the mobile phone and are respectively bent outwards from the long side of the cover middle area 31 of the four-curved-surface cover along the direction (shown in the direction a in fig. 1) of the cover middle area 31 facing away from the user so as to cover the long side (not shown) of the middle frame of the mobile phone. The second cover curved surface area 33 and the fourth cover curved surface area 35 are arranged at intervals along the length direction of the mobile phone, and the second cover curved surface area 33 and the fourth cover curved surface area 35 respectively extend along the width direction of the mobile phone and are respectively bent outwards from the short side of the cover middle area 31 of the four-curved cover along the direction (shown in the direction a in fig. 1) of the cover middle area 31 facing away from the user so as to cover the short side (not shown) of the middle frame of the mobile phone.

Four corners of the four curved surface cover plates are respectively provided with corner double-folded areas, the first cover plate curved surface area 32 and the second cover plate curved surface area 33 are connected at one corner of the four curved surface cover plates through the first cover plate corner double-folded area 36, the second cover plate curved surface area 33 and the third cover plate curved surface area 34 are connected at one corner of the four curved surface cover plates through the second cover plate corner double-folded area 37, the third cover plate curved surface area 34 and the fourth cover plate curved surface area 35 are connected at one corner of the four curved surface cover plates through the third cover plate corner double-folded area 38, and the fourth cover plate curved surface area 35 and the first cover plate curved surface area 32 are connected at one corner of the four curved surface cover plates through the fourth cover plate corner double-folded area 39.

Each of the above-mentioned double-folded regions is, for example, an overlapping region of the first cover curved surface region 32, the second cover curved surface region 33, the third cover curved surface region 34, and the fourth cover curved surface region 35 at the corner of the four-curved cover, and the four-curved cover is secondarily bent at the overlapping region. Illustratively, the bi-folded region is a three-dimensional curved surface.

As shown in fig. 4, for example, the light emitting display layer 10 is first attached to the curved cover plate 30, and after the light emitting display layer 10 and the curved cover plate 30 are attached to each other, the composite film 20 is attached to a surface of the light emitting display layer 10 opposite to the curved cover plate 30. The light emitting display layer 10 is in a plane shape before being attached to the curved cover plate 30, and after the light emitting display layer 10 is attached to the curved cover plate 30, the shape of the light emitting display layer 10 is the same as or similar to that of the curved cover plate 30.

Fig. 2 shows that the light-emitting display layer 10 of the present application is also correspondingly of a four-curved-surface form. That is, as shown in fig. 2, the light-emitting display layer 10 of the four-curved-surface type also includes a planar display layer intermediate region 11 and a curved-surface-shaped display layer edge region, and the curved-surface-shaped display layer edge region is provided so as to surround the planar display layer intermediate region 11. The planar middle region 11 of the light-emitting display layer 10 is bonded to the planar cover middle region 31 of the four-curved cover, and the curved display layer edge region of the light-emitting display layer 10 is bonded to the curved cover edge region of the four-curved cover. Accordingly, the curved edge region of the light emitting display layer 10 includes: the display device comprises a first display layer curved surface area 12, a second display layer curved surface area 13, a third display layer curved surface area 14 and a fourth display layer curved surface area 15, wherein adjacent curved surface areas are connected through corner double-folded areas.

Corner double-folded regions are respectively formed at four corners of the light-emitting display layer 10, the first display layer curved region 12 and the second display layer curved region 13 are connected at one corner of the light-emitting display layer 10 through the first display layer corner double-folded region 16, the second display layer curved region 13 and the third display layer curved region 14 are connected at one corner of the light-emitting display layer 10 through the second display layer corner double-folded region 17, the third display layer curved region 14 and the fourth display layer curved region 15 are connected at one corner of the light-emitting display layer 10 through the third display layer corner double-folded region 18, and the fourth display layer curved region 15 and the first display layer curved region 12 are connected at one corner of the light-emitting display layer 10 through the fourth display layer corner double-folded region 19.

With continued reference to fig. 3 and 4, the composite film 20 of the present application is also planar, generally rectangular, prior to being bonded to the light emitting display layer 10. The planar composite film 20 has a middle region 21 corresponding to the middle region 11 of the light-emitting display layer 10, and an edge region corresponding to the edge region of the light-emitting display layer 10. Prior to lamination, the edge regions of composite film 20 are disposed around and in the same plane as middle region 21 of composite film 20. After the edge region of the composite film 20 is attached to the edge region of the light-emitting display layer 10, the edge region of the composite film 20 is also curved accordingly. The overall shape of the composite film 20 is similar to the shape of the light-emitting display layer 10 shown in fig. 2.

Illustratively, referring to fig. 3, the edge region of the composite membrane 20 includes: a first edge area 22, a second edge area 23, a third edge area 24 and a fourth edge area 25, adjacent edge areas being connected by corner areas. The first edge region 22 and the third edge region 24 are disposed at intervals along the width direction (shown in the Y direction in fig. 3) of the mobile phone, and the first edge region 22 and the third edge region 24 respectively extend along the length direction (shown in the X direction in fig. 3) of the mobile phone and are respectively attached to the first display layer curved region 12 and the third display layer curved region 14. The second edge area 23 and the fourth edge area 25 are arranged at intervals along the length direction of the mobile phone, and the second edge area 23 and the fourth edge area 25 respectively extend along the width direction of the mobile phone and are respectively attached to the second display layer curved area 13 and the fourth display layer curved area 15.

The corner regions of compound membrane 20 include a first corner region 26, a second corner region 27, a third corner region 28, and a fourth corner region 29. The first corner region 26 is used for being attached to the first display layer corner double folded region 16 of the light emitting display layer 10, the second corner region 27 is used for being attached to the second display layer corner double folded region 17, the third corner region 28 is used for being attached to the third display layer corner double folded region 18, and the fourth corner region 29 is used for being attached to the fourth display layer corner double folded region 19.

The cover 30 of the present invention is not limited to the four-curved cover, and accordingly, the light-emitting display layer 10 is not limited to the four-curved cover. In some possible embodiments, the cover sheet 30 to which the luminescent display layer 10 of the present application is to be attached is a hyperbolic cover sheet, and accordingly, the luminescent display layer 10 is in a hyperbolic form. The hyperboloid cover plate differs from the four-curved cover plate shown in fig. 1 in that the curved edge region of the hyperboloid cover plate comprises: a first cover curved surface area 32 and a third cover curved surface area 34. Alternatively, the curved edge region of the doubly-hyperbolic cover plate comprises: a second cover curved surface area 33 and a fourth cover curved surface area 35.

One possible method of applying composite film 20 is described below in conjunction with FIG. 4. As shown in fig. 4 (a), the light-emitting display layer 10 is bonded to the curved cover 30, and the composite film 20 is bonded to the light-emitting display layer 10 by pressing the cover with the roller 41. Specifically, the intermediate region 21 of the composite film 20 and the planar intermediate region 11 of the luminescent display layer 10 are pressed by the roller 41, and the intermediate region 21 of the composite film 20 and the planar intermediate region 11 of the luminescent display layer 10 are bonded to each other. Since the curved edge region of the light-emitting display layer 10 has a curvature, the entire curved edge region of the light-emitting display layer 10 cannot be directly rolled by the roller 41, that is, the first display layer curved region 12, the second display layer curved region 13, the third display layer curved region 14, the fourth display layer curved region 15, and the corner double-folded regions of the light-emitting display layer 10 cannot be directly rolled by the roller 41.

This causes problems of bubbles and virtual sticking in the edge region of the composite film 20, curved regions of the light-emitting display layer 10, and double-folded regions at corners, and the sticking quality is not high. Fig. 4 (b) shows that the first edge region 22 of the composite film 20 and the first display layer curved region 12 of the light-emitting display layer 10 have the problem of the dummy sticking and the bubble, and the third edge region 24 of the composite film 20 and the third display layer curved region 14 of the light-emitting display layer 10 have the problem of the dummy sticking and the bubble. The yield loss caused by the problems of virtual sticking and bubbles in the current module factory is about 0.1%.

Therefore, the application provides another attaching method, the edges of the composite film 20 and the light-emitting display layer 10 can be attached, the problems of virtual attachment and air bubbles are solved, and the attaching quality is ensured.

The following describes in detail a fitting process of another fitting method of the present application, which mainly includes an edge suction preliminary profiling stage and an edge purging stage, with reference to fig. 5 to 8.

In some possible embodiments, referring to fig. 5 to 8, the fitting method of the present application includes the following steps:

s100: the suction nozzle 40 is in a suction state, and sucks the edge region of the composite film 20 so that the edge region of the composite film 20 does not contact the curved edge region of the light emitting display layer 10.

In the present application, the light-emitting display layer 10 is exemplified by the four-curved surface form described above. As shown in fig. 6 (a) and 7 (a), the number of the suction nozzles 40 is four, the four suction nozzles 40 are in a suction state, and the four suction nozzles 40 respectively suck intermediate positions of the first edge area 22, the second edge area 23, the third edge area 24, and the fourth edge area 25 of the composite film 20. The present application does not limit the number of the suction nozzles 40, does not limit the specific position of the edge of the composite film 20 that the suction nozzles 40 absorb, and is within the protection scope of the present application in a manner that the suction nozzles 40 can absorb the edge region of the composite film 20 to separate the edge region of the composite film 20 from the curved edge region of the light-emitting display layer 10.

For example, in some possible embodiments, four suction nozzles 40 respectively suck the first corner region 26, the second corner region 27, the third corner region 28, and the fourth corner region 29 of the composite film 20. Alternatively, in some possible embodiments, the number of the nozzles 40 is eight, wherein four nozzles 40 respectively absorb the first corner region 26, the second corner region 27, the third corner region 28 and the fourth corner region 29 of the composite film 20, and the remaining four nozzles 40 respectively absorb the middle positions of the first edge region 22, the second edge region 23, the third edge region 24 and the fourth edge region 25 of the composite film 20.

In the present application, the cover plate, the light emitting display layer 10, and the composite film 20 are exemplarily placed in the bonding chamber 100, the suction nozzle 40 is in a suction state, and the bonding chamber 100 is a vacuum chamber. That is, before the composite film 20 is bonded to the light-emitting display layer 10, the bonding chamber 100 is evacuated. Illustratively, a vacuum evacuation device in communication with the pasting cavity 100 is activated to evacuate the pasting cavity 100 by the vacuum evacuation device. In this application, subsequent bonding operation (i.e. the bonding process of the light-emitting display layer 10 and the composite film 20) is performed in the vacuum chamber, so that the composite film 20 can be more tightly and firmly bonded to the light-emitting display layer 10 under the action of the pressing pad 50, and the edge region of the composite film 20 can naturally extend in the extending direction under the action of the unilateral air pressure when the atmospheric pressure is subsequently released, which is beneficial to the bonding and exhausting of the curved edge region.

In some possible embodiments, the conformable chamber 100 is not a vacuum chamber.

S200: the bonding pad 50 presses the intermediate region 21 of the composite film 20 in the bonding direction so that the intermediate region 21 of the composite film 20 is bonded to the planar intermediate region 11 of the light-emitting display layer 10.

As shown in fig. 6 (a), the lamination pad 50 presses the middle area 21 of the compound membrane 20 in the lamination direction (direction a shown in fig. 6 (a)). As shown in fig. 6 (b), when the composite film 20 is pressed by the pressing pad 50, a part of the middle region 21 of the composite film 20 is bonded to the planar middle region 11 of the light-emitting display layer 10. Illustratively, the side of the composite film 20 facing the luminescent display layer 10 is coated with a layer of foam adhesive, and a portion of the middle region 21 of the composite film 20 is attached to the planar middle region 11 of the luminescent display layer 10 through the foam adhesive.

Since the edge area of the composite film 20 is sucked by the suction nozzle 40 and is primarily conformed to the edge area of the light emitting display layer 10 by the pressing action of the pressing pad 50. This is the edge profiling stage of the composite film 20, in which the edge regions of the composite film and the edge regions of the light-emitting display layer are not bonded together and do not touch each other, and no air bubbles are trapped between the edge regions of the composite film 20 and the edge regions of the light-emitting display layer 10. Meanwhile, due to the preliminary profiling of the suction nozzle 40 and the pressing pad 50, the problem of glue scraping caused by the fact that the composite film 20 contacts the light-emitting display layer 10 in advance is improved.

Fig. 6 (b) shows that the first edge region 22 of the composite film 20 is initially contoured with the first display layer curved region 12 of the light-emitting display layer 10 and the third edge region 24 of the composite film 20 is initially contoured with the third display layer curved region 14 of the light-emitting display layer 10. It is understood that the second edge region 23 of the composite film 20 is initially contoured to the second display layer curved region 13 of the light-emitting display layer 10, the fourth edge region 25 of the composite film 20 is initially contoured to the fourth display layer curved region 15 of the light-emitting display layer 10, and the corner regions of the composite film 20 are also initially contoured to the corner double-folded regions of the light-emitting display layer 10.

Illustratively, the contact area of the compression pad 50 with the central region 21 of the compound membrane 20 is less than the area of the central region 21 of the compound membrane 20. In some possible embodiments, the contact area of compression pad 50 with intermediate region 21 of compound membrane 20 is equal to the area of intermediate region 21 of compound membrane 20.

Furthermore, the present application is not limited to pressing the intermediate region 21 of the compound membrane 20 via the pressure pad 50, and in some possible embodiments, the intermediate region 21 of the compound membrane 20 may also be pressed via the roller 41 described above.

S300: the pressing pad 50 is moved in a direction perpendicular to the pressing direction so that the middle region 21 of the composite film 20 is attached to the middle region 11 of the light emitting display layer 10.

After the preliminary profiling of the edge region of the composite film 20 and the edge region of the light-emitting display layer 10 is completed, the press pad 50 may be moved from the center to the periphery (the direction C shown in fig. 6 (C) is a moving direction) so that the middle region 21 of the composite film 20 and the middle region 11 of the light-emitting display layer 10 are attached.

In some possible embodiments, the pressing pressure of the pressing pad 50 pressing the middle region 21 of the composite film 20 is between 200kgf and 400 kgf; the pressing speed of the pressing pad 50 for pressing the middle area 21 of the composite film 20 is between 3mm/s and 6 mm/s; the nip pad 50 remains pressed against the intermediate region 21 of the compound membrane 20 for 2s to 6 s. Within the above-mentioned range of pressing parameters, the intermediate region 21 of the composite film 20 and the intermediate region 11 of the light-emitting display layer 10 can be well attached.

In some possible embodiments, the contact area of compression pad 50 with intermediate region 21 of compound membrane 20 is equal to the area of intermediate region 21 of compound membrane 20. The press pad 50 may not move in the middle region 21 of the composite film 20, i.e., the middle region 21 of the composite film 20 may be attached to the middle region 11 of the light-emitting display layer 10 by pressing the middle region 21 of the composite film 20 at one time.

Also, in some possible embodiments, the roller 41 may be moved along the pressing direction (a shown in fig. 6 (a)), and after the composite film 20 is pressed onto the light-emitting display layer 10, the roller may be rolled back and forth along a direction perpendicular to the pressing direction (C direction shown in fig. 6 (C)) to make the middle region 21 of the composite film 20 fit with the middle region 11 of the light-emitting display layer 10.

S400: the suction nozzle 40 is switched from a suction state to an air blowing state, and the suction nozzle 40 blows the edge region of the composite film 20 in the air blowing state, so that the edge region of the composite film 20 is attached to the edge region of the light emitting display layer 10.

After the intermediate region 21 of the composite film 20 and the intermediate region 11 of the light-emitting display layer 10 are bonded, the edge purge stage is started. In the edge purging stage, the vacuum environment of the bonding chamber 100 is released, for example, the vacuum pumping device stops working, and the bonding chamber 100 is communicated with the outside atmosphere. After the attaching cavity 100 releases atmospheric pressure, the edge region of the composite film 20 naturally extends in the outward extending direction, so that the preliminary profiling effect is better, good attachment of the edge region of the composite film 20 and the edge region of the light-emitting display layer 10 in a subsequent edge purging stage is facilitated, and complete profiling is realized.

As shown in fig. 6 (c) and 7 (b), after the bonding chamber 100 is opened to the atmosphere, the suction nozzle 40 is switched from the suction state to the blowing state, and the edge region of the composite film 20 is purged by the suction nozzle 40 to perform gas driving, thereby achieving good bonding between the edge region of the composite film 20 and the edge region of the light-emitting display layer 10 (as shown in fig. 6 (d)). In fig. 6 (c), the suction nozzle 40 purges the first and

third edge regions

22 and 24 of the composite membrane 20.

The "preliminary profiling" of the edge profiling stage of the composite film 20 described above is not a complete profiling of the edge region of the composite film 20 to the edge region of the luminescent display layer 10, but rather a degree of profiling, relative to the "complete profiling" of the edge purging stage of the composite film 20. For example, in the "preliminary profiling" stage, the edge region of the luminescent display layer 10 takes a curved form, and the angle of curvature of the edge region of the luminescent display layer 10 is, for example, 60 °; the edge region of the composite film 20 is also bent, and the bending angle of the edge region of the composite film 20 is smaller than that of the edge region of the light emitting display layer 10, and the bending angle of the edge region of the composite film 20 is, for example, 50 °. In the "full profiling" stage, the bend angle of the edge region of the compound film 20 is the same as the bend angle of the edge region of the light-emitting display layer 10, i.e. the bend angle of the edge region of the compound film is 60 °.

Illustratively, the suction nozzle 40 purges the edge regions of the composite membrane 20 with an inert gas, such as nitrogen. The inert gas is relatively stable and does not chemically react with the edge regions of composite membrane 20 during the process of purging the edge regions of composite membrane 20. In addition, the suction nozzle 40 can adjust the purge angle and the air pressure during the edge purge phase.

In summary, the bonding process of the composite film 20 and the light emitting display layer 10 of the present application mainly goes through an edge profiling stage and an edge purging stage. In the edge profiling stage, the composite film 20 is not in contact with the edge region of the light-emitting display layer 10, so that preliminary profiling is realized, air bubbles are not sealed, and the middle region 21 of the composite film 20 and the middle region 11 of the light-emitting display layer 10 are expanded from the middle to four sides to complete the attachment of a plane region; in the edge purging stage, the edge region of the composite film 20 is purged through the suction nozzle 40, so that the composite film 20 is attached to the edge region of the light-emitting display layer 10, and complete profiling is realized. The problems that the edge region of the composite film 20 is easily attached to the edge region (especially the corner region) of the light emitting display layer 10 in a pseudo manner and bubbles are locked by contact in advance are solved. The composite film 20 has good bonding quality with the light-emitting display layer 10, and the yield is high.

In some possible embodiments, after the edge region of the composite film 20 is purged through the suction nozzle 40, a portion of the edge region of the composite film 30 may be rolled by the roller 41 described above, so as to ensure the quality of the attachment of the edge region of the composite film 20 to the light emitting display layer 10.

The specific manner in which the suction nozzle 40 purges the edge area of the composite membrane 20 is described in detail below.

In some possible embodiments, the suction nozzle 40 moves along the width direction (indicated by Y direction in fig. 3) and the length direction (indicated by X direction in fig. 3) of the composite membrane 20, respectively, to purge the edge area of the composite membrane 20.

Illustratively, suction nozzles 40 are provided at positions corresponding to the first, second, third, and

fourth edge areas

22, 23, 24, and 25, respectively, of the compound membrane 20. The suction nozzles 40 corresponding to the first edge region 22 and the third edge region 24 move along the length direction (e.g., move back and forth or move at one time) to purge the first edge region 22 and the third edge region 24, so that the first edge region 22 is attached to the first display layer curved region 12 and the third edge region 24 is attached to the third display layer curved region 14. The suction nozzles 40 corresponding to the second edge area 23 and the fourth edge area 25 move in the width direction (for example, move back and forth or move at a time) to purge the second edge area 23 and the fourth edge area 25, so that the second edge area 23 is attached to the second display layer curved area 13 and the fourth edge area 25 is attached to the fourth display layer curved area 15.

Each of the suction nozzles 40 moves in the longitudinal direction and the width direction, and there are sweeping overlapping areas at four corner areas of the composite membrane 20. For example, the suction nozzle 40 purges the first edge region 22 and the second edge region 23 of the composite membrane 20, with an overlap region of purges in the first corner region 26. Because the composite metal film has a strong plastic deformation resistance, the four corner regions of the composite film 20 can be well attached due to the overlapped sweeping of the suction nozzle 40, and the four corner regions of the composite film 20 can not be swept in a targeted manner, that is, the first corner region 26 of the composite film 20 is attached to the first display layer corner double-folded region 16, the second corner region 27 is attached to the second display layer corner double-folded region 17, the third corner region 28 is attached to the third display layer corner double-folded region 18, and the fourth corner region 29 is attached to the fourth display layer corner double-folded region 19. In some possible embodiments, in order to ensure the purging effect, after the suction nozzle purges the edge area of the composite membrane 20, the corner area of the composite membrane 20 may be purged in a targeted manner.

In some possible embodiments, the suction nozzle 40 only purges the first edge region 22, the second edge region 23, the third edge region 24 and the fourth edge region 25 of the composite film 20, respectively, and there is no purging overlap region in the four corner regions of the composite film 20, and it is necessary to purge the four corner regions of the composite film 20 again, respectively.

In some possible embodiments, a suction nozzle 40 may be provided, the suction nozzle 40 purging around the edge region of the composite membrane 20. For example, the first edge zone 22, the first corner zone 26, the second edge zone 23, the second corner zone 27, the third edge zone 24, the third corner zone 28, the fourth edge zone 25, and the fourth corner zone 29 of the composite membrane 20 are sequentially purged.

In some possible embodiments, a plurality of suction nozzles 40 may be respectively disposed at positions corresponding to the first edge region 22, the second edge region 23, the third edge region 24, the fourth edge region 25, and the four corner regions of the composite membrane 20, and each suction nozzle 40 does not need to perform a plurality of purges but performs a one-time purge.

In some possible embodiments, the suction nozzle 40 blows the edge region of the composite film 20 in a direction toward the edge region of the luminescent display layer 10 along the middle region 11 of the luminescent display layer 10. For example, the suction nozzle 40 rotates the purge in a direction of curvature of the edge region of the composite membrane 20 and then moves the purge during the purge. That is, the suction nozzle 40 performs the blowing in a longitudinal direction in a stepwise manner, rotates and blows along the bending directions of the first edge region 22 and the third edge region 24 of the composite film 20 in each stage, moves to the next stage in the longitudinal direction, performs the rotating and blowing again, and repeats the above processes until the first edge region 22 of the composite film 20 is attached to the first display layer curved region 12 and the third edge region 24 is attached to the third display layer curved region 14.

And the suction nozzle 40 sweeps in the width direction in a segmented manner, rotates and sweeps along the bending direction of the second edge area 23 and the fourth edge area 25 of the composite film 20 in each segment, moves to the next segment along the width direction, rotates and sweeps again, and repeats the above process until the second edge area 23 of the composite film 20 is attached to the second display layer curved area 13 and the fourth edge area 25 is attached to the fourth display layer curved area 15.

Similarly, the suction nozzle 40 blows to the four corner areas of the composite membrane 20 by a rotary blow.

Illustratively, the suction nozzle 40 purges the edge region of the composite film 20 along the bending direction of the edge region of the luminescent display layer 10 with a connection of the middle region 11 of the luminescent display layer 10 and the edge region of the luminescent display layer 10 as a purge start point. That is, the rotational blowing direction of the suction nozzle 40 is directed from the flat middle region 11 to the curved edge region. Referring to fig. 6 and 8, the process of rotary purging described above is illustrated with the suction nozzle 40 rotating to purge the first edge region 22 of the composite membrane 20. The suction nozzle 40 purges the first edge region 22 of the composite film 20 along the bending direction (shown in fig. 6 (c) and fig. 8 (B)) of the first display layer curved region 12 of the luminescent display layer 10 with the connection of the middle region 11 of the luminescent display layer 10 and the first display layer curved region 12 of the luminescent display layer 10 as a purge start point.

That is, the suction nozzle 40 starts to purge the edge region (e.g., the first edge region 22) of the composite film 20 from the position (c) shown in fig. 6 and 8, and performs the purge of the edge region of the light emitting display layer 10 along the curved direction of the edge region of the light emitting display layer 10 until the position (c) shown in fig. 6 and 8. Such a purging method is advantageous in achieving the driving and bonding of the portion between the edge region of the composite film 20 and the edge region of the light-emitting display layer 10, and can improve the generation of bubbles between the composite film 20 and the light-emitting display layer 10 and the bonding quality.

In addition, the suction nozzle 40 of the present application can set the following parameters according to the attachment requirement in the process of blowing the edge area of the composite film 20 in the blowing state: a set distance, a set angle, a set purge speed, a set gas flow. Wherein the set distance is a distance (shown as L in fig. 8) of the suction nozzle 40 from the edge area of the composite film 20, and the set angle is an angle (shown as α in fig. 6 (c) and 8) of the suction nozzle 40 from the pressing direction.

In some possible embodiments, the set distance of the suction nozzle 40 is between 0.5cm and 1.5cm, including 0.5cm and 1.5 cm. The suction nozzle 40 blows the edge area of the composite film 20 in a non-contact manner, and it is difficult for the suction nozzle 40 to well achieve driving by being too far from and too close to the edge area of the composite film 20, thereby improving the generation of air bubbles between the composite film 20 and the light emitting display layer 10. The suction nozzle 40 can satisfactorily drive the gas within the above-described set distance range from the edge area of the composite film 20.

In some possible embodiments, the set angle is adapted to the bending angle (shown as α in fig. 8) of the edge region of the light-emitting display layer 10. Illustratively, the bending angle of the edge region of the light emitting display layer 10 is 60 °, and the set angle is between 0 ° and 60 °, including 0 ° and 60 °. The suction nozzle 40 blows the edge area of the composite film 20 between 0 ° and 60 °, and the suction nozzle 40 is perpendicular to the luminescent display layer 10 at 0 °. That is, the suction nozzle 40 needs to rotate from 0 ° to 60 ° to complete the purging of the edge area of the composite membrane 20, and the suction nozzle 40 rotates 60 ° during the whole purging process.

In some possible embodiments, the set purge rate is between 0.2mm/s and 0.5mm/s, including 0.2mm/s and 0.5 mm/s. In some possible embodiments, the set gas flow rate is between 100LPM and 500LPM, including 100LPM and 500 LPM. Illustratively, when the material of composite membrane 20 includes electrolytic copper, the set gas flow rate is between 100LPM and 500 LPM. When the material of composite film 20 comprises rolled copper, the gas flow rate is set to be between 400LPM and 1000 LPM.

In some possible embodiments, when the bending angle of the edge region of the luminescent display layer 10 is 60 °, the process of the suction nozzle 40 blowing the edge region of the composite film 20 along the bending direction of the edge region of the luminescent display layer 10 includes a plurality of stages, for example, three stages. Illustratively, in the first stage, which is a stage in which the set angle is between 0 ° and 20 °, the purge speed set by the suction nozzle 40 is 0.5mm/s, and the gas flow set by the suction nozzle 40 is 500 LPM; in the second stage, the set angle is 20-40 degrees, the blowing speed set by the suction nozzle 40 is 0.2mm/s, and the gas flow set by the suction nozzle 40 is 500 LPM; in the third stage, the set angle is 40 ° to 60 °, the purge speed set by the suction nozzle 40 is 0.5mm/s, and the gas flow set by the suction nozzle 40 is 500 LPM. The suction nozzle 40 can perform sufficient gas driving by purging nitrogen gas to the edge region of the composite film 20 in stages, so that the edge region of the composite film 20 and the edge region of the light emitting display layer 10 are well adhered.

In conclusion, the laminating method provided by the application improves the problems of bubbles and virtual pasting in the edge area in the laminating process of the composite film and the luminous display layer, so that the laminating quality of the composite film and the luminous display layer is improved, and the yield is improved.

Claims

1. A bonding method for bonding a composite film to a light-emitting display layer, the bonding method comprising:

providing a suction nozzle in a suction state, wherein the suction nozzle sucks the edge area of the planar composite film, so that the edge area of the composite film is not in contact with the curved edge area of the light-emitting display layer;

providing a pressing piece, wherein the pressing piece presses the middle area of the composite film along a pressing direction, so that the pressed part of the middle area of the composite film by the pressing piece is attached to the planar middle area of the light-emitting display layer, and the edge area of the composite film and the edge area of the light-emitting display layer are preliminarily shaped;

the suction nozzle is switched from the air suction state to the air blowing state, and the suction nozzle blows the edge area of the composite film in the air blowing state, so that the edge area of the composite film is attached to the edge area of the light-emitting display layer.

2. The attaching method according to claim 1, wherein the process of the suction nozzle blowing the edge area of the composite film in the air blowing state includes: and the suction nozzle sweeps the edge area of the composite film along the direction from the middle area of the light-emitting display layer to the edge area of the light-emitting display layer.

3. The attaching method according to claim 2, wherein the process of the suction nozzle blowing the edge area of the composite film in the air blowing state includes: and the suction nozzle uses the connection part of the middle area of the light-emitting display layer and the edge area of the light-emitting display layer as a sweeping starting point to sweep the edge area of the composite film.

4. The attaching method according to any one of claims 1 to 3, wherein the process of the suction nozzle purging the edge region of the composite film in the air blowing state includes: the suction nozzle moves along the extending direction of the edge area of the light-emitting display layer to blow the edge area of the composite film.

5. The attaching method according to claim 4, wherein the suction nozzle is reciprocally moved back and forth along an extending direction of the edge area of the light emitting display layer to purge the edge area of the composite film a plurality of times.

6. The attaching method according to any one of claims 1 to 5, wherein before the suction nozzle is switched from the suction state to the blowing state, the bonded member is moved in a direction perpendicular to the bonding direction so that a middle region of the composite film is attached to a middle region of the light-emitting display layer.

7. The attaching method according to any one of claims 1 to 6, wherein the edge region of the light emitting display layer includes: the display device comprises a first display layer curved surface area, a second display layer curved surface area, a third display layer curved surface area and a fourth display layer curved surface area, wherein adjacent display layer curved surface areas are connected through a corner double-folded area;

the first display layer curved surface area and the third display layer curved surface area are arranged at intervals along a first direction and respectively extend along a second direction, and the first direction is perpendicular to the second direction;

the second display layer curved surface area and the fourth display layer curved surface area are arranged at intervals along the second direction and respectively extend along the first direction;

the edge region of the composite film comprises: the display device comprises a first edge area, a second edge area, a third edge area and a fourth edge area, wherein adjacent edge areas are connected through corner areas;

the first edge area is attached to the first display layer curved surface area, the second edge area is attached to the second display layer curved surface area, the third edge area is attached to the third display layer curved surface area, the fourth edge area is attached to the fourth display layer curved surface area, and the corner area of the composite film is attached to the corner double-folded area of the light-emitting display layer.

8. The attaching method according to claim 7, wherein the process of the suction nozzle blowing the edge region of the composite film in the air blowing state includes:

the suction nozzle moves along the second direction to respectively purge the first edge area and the third edge area once or repeatedly back and forth for multiple times;

the suction nozzle moves along the first direction to respectively purge the second edge region and the fourth edge region one or more times back and forth.

9. The laminating method according to claim 8, wherein during the suction nozzle purging the first edge region, the second edge region, the third edge region and the fourth edge region, an overlap is purged at a corner region of the composite film.

10. The attaching method according to claim 7 or 8, wherein the process of the suction nozzle blowing the edge area of the composite film in the air blowing state includes: the suction nozzles respectively blow corner areas of the composite membrane.

11. The attaching method according to any one of claims 1 to 6, wherein the edge region of the light emitting display layer includes:

the display device comprises a first display layer curved surface area and a third display layer curved surface area which are arranged at intervals along a first direction, wherein the first display layer curved surface area and the third display layer curved surface area respectively extend along a second direction, and the first direction is perpendicular to the second direction;

the edge region of the composite film comprises: a first edge region and a third edge region;

the first edge area is attached to the first display layer curved surface area, and the third edge area is attached to the third display layer curved surface area; or,

the edge region of the light emitting display layer includes:

the display device comprises a first display layer curved surface area and a second display layer curved surface area which are arranged at intervals along a first direction, wherein the first display layer curved surface area and the second display layer curved surface area extend along the first direction;

the edge region of the composite film comprises: a second edge region and a fourth edge region;

the second edge area is attached to the second display layer curved surface area, and the fourth edge area is attached to the fourth display layer curved surface area.

12. The attaching method according to claim 11, wherein the process of the suction nozzle blowing the edge area of the composite film in the air blowing state includes:

the suction nozzle moves along the second direction to respectively purge the first edge area and the third edge area in one time or back and forth for multiple times; or,

the suction nozzle moves in the first direction to purge the second edge region and the fourth edge region one or more times back and forth, respectively.

13. The attaching method according to any one of claims 1 to 12, wherein in the air-suction state, the composite film, the light-emitting display layer, and the suction nozzle are in a vacuum chamber; in the blowing state, the vacuum environment of the vacuum cavity is released.

14. The attaching method according to any one of claims 1 to 13, wherein the process of the suction nozzle purging the edge region of the composite film in the air blowing state includes:

the suction nozzle sweeps the edge area of the composite film at a set distance, a set angle, a set sweeping speed and a set gas flow rate, wherein the set distance is the distance from the suction nozzle to the edge area of the composite film, and the set angle is the included angle between the suction nozzle and the pressing direction.

15. The method of conforming according to claim 14 wherein the set distance is between 0.5cm and 1.5 cm.

16. The attaching method according to claim 14, wherein the set angle is adapted to a bending angle of an edge region of the light emitting display layer.

17. The method of conforming according to claim 14 wherein the set purge rate is between 0.2mm/s and 0.5 mm/s.

18. The bonding method of claim 14, wherein the set gas flow rate is between 100LPM and 500 LPM.

19. The bonding method according to any one of claims 1 to 18, wherein the nozzle purges the edge region of the composite film with an inert gas.

20. The attaching method according to claim 14, wherein a bending angle of an edge region of the light emitting display layer is 60 °;

the process that the suction nozzle sweeps the edge area of the composite film in the blowing state comprises the following steps:

in a first phase, the first phase is a phase in which the set angle is between 0 ° and 20 °, the set purge speed is 0.5mm/s, and the set gas flow rate is 500 LPM;

in a second phase, the second phase is a phase in which the set angle is between 20 ° and 40 °, the set purge speed is 0.2mm/s, and the set gas flow rate is 500 LPM;

in a third phase, the third phase is a phase in which the set angle is between 40 ° and 60 °, the set purge speed is 0.5mm/s, and the set gas flow rate is 500 LPM.

21. The attaching method according to any one of claims 1 to 20, wherein, in the process of pressing the intermediate region of the composite film by the pressing member to attach the intermediate region of the composite film to the intermediate region of the light-emitting display layer:

a pressing pressure of the press to press the middle region of the composite film is between 200kgf and 400 kgf;

the pressing speed of the pressing piece for pressing the middle area of the composite film is between 3mm/s and 6 mm/s;

the press fit remains for 2s to 6s after pressing the middle region of the composite membrane.

22. The laminating method according to any one of claims 1 to 20, wherein the laminating element is a laminating pad or a roller.