A bonding device

Abstract

The embodiment of the present application provides a bonding device, including two slider pressure heads that can approach and move away from each other. The two slider pressure heads press the flexible display panel against the bonding surface of the curved cover plate in the process of moving away from each other, and each slider pressure head includes an elastic pad that supports the flexible display panel. In the bonding device in the embodiment of the present application, the two sliding pressure heads are each provided with a separate elastic pad, that is, the elastic pad adopts a split structure. Such a design can avoid the problem of the integrated elastic pad being repeatedly stretched and affecting the use time, and can also overcome the problem of insufficient stretching, so that it is suitable for the bonding of a large-angle curved cover plate with a large undercut depth and a flexible display panel; the split design can also allow the elastic pad to be repeatedly used, which can reduce the cost of the bonding equipment and improve the reliability, and is conducive to mass production.

Description

Technical Field

[0001] The embodiments of the present application relate to the technical field of display panel manufacturing, and in particular to a bonding device. Background Art

[0002] The bonding of the flexible display panel and the curved cover is one of the manufacturing processes of the curved display screen. Special bonding equipment is required to achieve the bonding of the flexible display panel and the curved cover. The existing bonding equipment first presses the middle part of the flexible display panel to the straight area of ​​the curved cover, and then presses the side part of the flexible display panel to the curved area of ​​the curved cover to complete the bonding of the flexible display panel and the curved cover.

[0003] A bonding device is provided in the related art, and the bonding device includes a bonding body and an elastic support body. The outer side of the bonding body has a bonding surface, and the bonding surface includes a bonding plane and a first bonding curved surface and a second bonding curved surface located on both sides of the bonding plane. The bonding plane corresponds to the straight area of ​​the curved cover plate, and the first bonding curved surface and the second bonding curved surface correspond to the curved area of ​​the curved cover plate. The bonding body includes a first bonding half body and a second bonding half body. The outer side of the first bonding half body has a first bonding curved surface, and the outer side of the second bonding half body has a second bonding curved surface. The elastic support body is arranged on the bonding surface of the bonding body, and is engaged with the first bonding curved surface and the second bonding curved surface. The first bonding half body and the second bonding half body are moved closer to or farther from each other to achieve bonding between the flexible panel and the curved cover plate.

[0004] However, in the above-mentioned bonding equipment, the elastic support body is repeatedly stretched during the mutual movement between the first bonding half and the second bonding half, and the repeated stretching causes the usable time of the elastic support body to be severely shortened; and for the bonding of a curved panel with a large bending angle and a flexible display panel, the relative movement distance between the first bonding half and the second bonding half is large, which will cause the elastic support body to be stretched by a longer distance, further affecting the use time of the elastic support body. Summary of the invention

[0005] The purpose of the embodiments of the present application is to provide a fitting device to improve the problem of short service life of the elastic support body in the related art.

[0006] Based on the above-mentioned purposes, in the first aspect, an embodiment of the present application provides a bonding device, comprising two slider presses that can approach and move away from each other, and the two slider presses press the flexible display panel against the bonding surface of the curved cover plate when moving away from each other, and each of the slider presses comprises an elastic pad that supports the flexible display panel.

[0007] In the bonding device in the embodiment of the present application, both sliding pressure heads are provided with separate elastic pads, that is, the elastic pads adopt a split structure. Such a design can avoid the problem of the integrated elastic pad being repeatedly stretched and affecting the use time, and can also overcome the problem of insufficient stretching, so as to be suitable for the bonding of large-angle curved cover plates with a large undercut depth and flexible display panels; the split design can also allow the elastic pads to be repeatedly used, which can reduce the cost of the bonding equipment and improve reliability, and is conducive to mass production.

[0008] In a possible implementation manner, the slider pressure head includes a pressure head portion and the elastic pad fixedly attached to the pressure head portion, and the side of the pressure head portion in contact with the elastic pad is a non-smooth rough surface.

[0009] In a possible implementation manner, the elastic pad is made of silicone or rubber.

[0010] In a possible implementation manner, the elastic pad is silicone injection-molded on the pressure head.

[0011] In a possible embodiment, the two sliding head presses have a first position for laminating a flat area and a second position for laminating a curved area; the sliding head has a contour surface, the flexible display panel is laminated to a carrier film, and the laminating device includes a guiding mechanism for guiding the movement of the carrier film, the guiding mechanism has a contour position during movement, and the guiding mechanism at the contour position drives the flexible display panel to conform to the contour surface through the carrier film.

[0012] In a possible implementation, the guiding mechanism at the contour-matching position drives the flexible display panel to conform to the sliding pressure head between the first position and the second position.

[0013] In a possible embodiment, the profiling surface includes a planar profiling surface and a curved profiling surface, one end of the curved profiling surface is connected to the planar profiling surface, and the other end of the curved profiling surface is a profiling end; the guiding mechanism includes a contact end, the contact end is in contact with the carrier film extending from the curved profiling surface, and the contact position of the contact end with the carrier film when the guiding mechanism moves to the profiling position is a guiding position, and the guiding position is located at the end section tangent to the profiling end when the sliding pressure head is in the second position, or between the end section and the planar profiling surface.

[0014] In a possible embodiment, the sliding ram also includes a bottom extension surface, which extends from the contoured end toward a side away from the curved contoured surface; the bottom extension surface coincides with the end section, or is closer to the planar contoured surface than the end section; the guide position coincides with the bottom extension surface when the sliding ram moves to the second position.

[0015] In a possible embodiment, the slider ram includes a slider connecting surface, which is connected to one end of the bottom extension surface away from the curved contour surface, and extends from the bottom extension surface in a direction away from the planar contour surface; the guide position is located at the connection position between the bottom extension surface and the sliding connection when the sliding ram moves to the second position.

[0016] In a possible implementation manner, a chamfer is connected between the slider connection surface and the bottom extension surface; and the contact end is an arc protrusion that matches the chamfer.

[0017] In a possible implementation manner, the arc diameter of the contact end is equal to the difference between the fillet diameter and the thickness of the carrier film.

[0018] In a possible embodiment, the guiding mechanism includes a guiding clamp arranged corresponding to the sliding pressure head, and the guiding clamp includes a guiding member extending in a direction perpendicular to the movement direction of the sliding pressure head. When the guiding mechanism moves to the contouring position, one end of the guiding member close to the contouring surface is a contact end in contact with the supporting film.

[0019] In a possible implementation manner, an end of the guide member away from the contact end is connected to a connecting member, and the connecting member extends from the guide member along a movement direction of the corresponding sliding pressure head away from the other sliding pressure head.

[0020] In a possible implementation, the guiding fixture further includes a fixing member extending parallel to the connecting member, and the fixing member is disposed on a side of the connecting member opposite to the guiding member; the fixing member cooperates with the connecting member to clamp the carrier film.

[0021] In a possible embodiment, the bonding device includes a cover plate jig arranged on the side of the flat contour surface, the cover plate jig fixes the curved cover plate, and at least one of the cover plate jig and the sliding pressure head can move toward the other side, and during the movement, there is a bonding position in which the sliding pressure head enters the interior of the curved cover plate for bonding; the guide member extends in the gap between the curved cover plate and the sliding pressure head at the bonding position.

[0022] In a possible implementation, the connecting member is located outside the curved cover plate and the cover plate fixture in the fitting position.

[0023] In a possible implementation manner, the cover plate fixture is provided with a cover plate groove for accommodating the curved cover plate. BRIEF DESCRIPTION OF THE DRAWINGS

[0024] In order to more clearly illustrate the embodiments of the present application or the technical solutions in the prior art, the drawings required for use in the embodiments or the description of the prior art will be briefly introduced below. Obviously, the drawings described below are only embodiments of the present application. For ordinary technicians in this field, other drawings can be obtained based on these drawings without paying any creative work.

[0025] Figure 1 A schematic diagram of the structure of a bonding device provided in an embodiment of the present application;

[0026] Figure 2 for Figure 1 Schematic diagram of the coordination between the middle cover plate jig and the curved cover plate;

[0027] Figure 3 for Figure 1 Schematic diagram of the structure of the sliding pressure head;

[0028] Figure 4 for Figure 1 Schematic diagram of the structure of the middle guide fixture;

[0029] Figure 5 A schematic diagram of a bonding device provided in an embodiment of the present application during operation Figure 1 ;

[0030] Figure 6 A schematic diagram of a bonding device provided in an embodiment of the present application during operation Figure 2 ;

[0031] Figure 7 A schematic diagram of a bonding device provided in an embodiment of the present application during operation Figure 3 ;

[0032] Figure 8 A schematic diagram of a bonding device provided in an embodiment of the present application during operation Figure 4 .

[0033] Description of reference numerals:

[0034] 1-cover jig, 2-curved cover, 21-cover opening, 3-flexible display panel, 4-guide clamp, 41-fixing member, 42-guide member, 43-contact end, 44-connecting member, 5-bearing film, 6-sliding pressure head, 61-elastic pad, 62-flat profiling surface, 63-curved profiling surface, 64-bottom extension surface, 65-rounded corners, 66-slider connection surface, 67-pressure head. DETAILED DESCRIPTION

[0035] In order to make the purpose, technical solution and advantages of the embodiments of the present application clearer, the technical solution in the embodiments of the present application will be clearly and completely described below in conjunction with the drawings in the embodiments of the present application. Obviously, the described embodiments are part of the embodiments of the present application, not all of the embodiments. Based on the embodiments in the present application, all other embodiments obtained by ordinary technicians in this field without creative work are within the scope of protection of this application.

[0036] The curved display screen includes a curved cover plate and a flexible display panel, wherein the curved cover plate covers the outer side surface of the flexible display panel along the display direction, and is used to protect the flexible display panel from external impact. In order to ensure the normal display of the flexible display panel, the curved cover plate should have good light transmittance on the basis of having a certain strength. For example, the curved cover plate can be at least one of sapphire glass, gorilla glass, polyethylene terephthalate, polycarbonate, polyether sulfone, polynaphthalate and polynorbornene.

[0037] In terms of shape, the curved cover plate in the curved display screen includes a flat cover plate portion and a curved cover plate portion. The flat cover plate portion may be a rectangular plate extending parallel to the plane, and the rectangular plate has two pairs of opposite side edges. Two curved cover plate portions are provided, each of which is connected to one side edge of the flat cover plate portion, and the sides connected by the two curved cover plate portions are opposite. The curved cover plate portion is smoothly connected to the flat cover plate portion. For example, the curved cover plate portion may be an arc-shaped structure tangent to the flat cover plate portion.

[0038] It should be pointed out that the curved cover plate is usually an integrally formed structure, and there is no strict boundary between the plane cover plate portion and the curved cover plate portion. Generally, the area surrounded by the extended end edge contour of the plane is defined as the plane cover plate portion, and the curved cover plate portion is bent and extended from the edge of the plane cover plate portion to form a curved curved cover plate.

[0039] The two curved cover plate parts are bent from the flat cover plate part toward the same side, and the end of the curved cover plate part away from the flat cover plate part is the cover plate bending end, and the two cover plate bending ends limit the cover plate opening of the curved cover plate, and the distance between the two cover plate bending ends is the opening width of the cover plate opening. The plane tangent to the cover plate bending end is defined as the cover plate end section, and the angle of the cover plate end section relative to the outer side of the flat cover plate part is defined as the cover plate bending angle. The cover plate bending angle can be used to indicate the bending degree of the curved cover plate, and the cover plate bending angle is greater than 0 degrees and usually not greater than 180 degrees.

[0040] The larger the bending angle of the cover plate, the greater the bending degree of the curved cover plate. When the bending angle of the cover plate is greater than 90 degrees, the bent cover plate portion bypasses the outer boundary and bends and extends toward another bent cover plate portion. The bent cover plate portion has a certain undercut depth. In a plane parallel to the flat cover plate portion, the maximum distance between the bent end of the cover plate and the inner side surface of the bent cover plate portion is the undercut depth.

[0041] The side of the curved cover plate corresponding to the bending direction of the curved cover plate portion is the inner side, and the side away from the bending direction of the curved cover plate portion is the outer side. The inner side of the curved cover plate is the bonding surface bonded to the flexible display panel. The flexible display panel is bonded to the bonding surface of the curved cover plate. The flexible display panel can be a flexible OLED light-emitting display panel, or other flexible and bendable screen.

[0042] The shape of the flexible display panel when it is bonded to the curved cover plate is defined as a bonded shape. The flexible display panel in the bonded shape is a curved shape that matches the curved cover plate. The flexible display panel in the bonded shape includes a flat display portion and a curved display portion. The flat display portion is bonded to the inner side surface of the flat cover plate portion, and is a flat plate-like structure that matches the flat cover plate portion; the curved display portion is bonded to the inner side surface of the curved cover plate portion, and is a curved structure that matches the curved display portion.

[0043] In the process of manufacturing curved display screens, bonding the flexible display panel to the bonding surface of the curved cover plate requires a bonding device. The embodiment of the present application provides a bonding device, which is used for bonding the flexible display panel to the curved cover plate, and can adapt to the bonding of a large-angle curved cover plate with a bending angle of the cover plate between 90-180 degrees and the flexible display panel. The following embodiments are described using a 90-180 degree curved cover plate as an example. Obviously, on the basis of being able to bond a large-angle curved cover plate of 90-180 degrees, the bonding device can also be applicable to a small-angle curved cover plate of less than 90 degrees.

[0044] Figure 1 A schematic diagram of the structure of a bonding device provided in an embodiment of the present application is shown in FIG. Figure 2 for Figure 1 Schematic diagram of the coordination between the middle cover plate fixture and the curved cover plate, as shown in Figure 1 and Figure 2 As shown, the laminating device includes a cover plate jig 1, a sliding pressure head 6 and a guiding mechanism. The cover plate jig 1 is used to fix the curved cover plate 2. The cover plate jig 1 can be adsorbed on the outer side of the curved cover plate 2 by vacuum adsorption to fix the curved cover plate 2. The cover plate jig 1 can also fix the curved cover plate 2 by other methods.

[0045] For example, in this embodiment, the cover plate jig 1 is provided with a cover plate groove, which is connected to the outside through a groove on one side; the cover plate groove limits a groove body space that matches the curved cover plate 2, and the inner wall surface of the groove body space includes a plane groove wall and a curved groove wall. The plane cover plate portion of the curved cover plate 2 is in contact with the plane groove wall, and the outer side surfaces of the two curved cover plate portions are in contact with the curved groove wall. The curved cover plate 2 located in the cover plate groove has a cover plate opening 21 that is connected to the outside through the groove. The curved end of the cover plate should also be aligned with the end of the curved groove wall or exceed the end of the curved groove wall by a certain distance, so that the cover plate groove can limit the curved cover plate 2 in the cover plate groove, and the cover plate opening 21 is located in the groove to facilitate the fitting of the fitting device (see below).

[0046] It is defined that under the restriction of the cover plate fixture 1, the plane cover plate portion in the curved cover plate 2 is parallel to the first plane, the direction of the cover plate opening 21 is the first direction, the straight line where the first direction is located is the first straight line, the first straight line is perpendicular to the first plane, and the first direction is the direction of the cover plate opening 21 along the first straight line relative to the plane cover plate portion. The outer side surface of the cover plate fixture 1 along the first direction is a certain distance from the end of the curved groove wall.

[0047] by Figure 1 and Figure 2 Taking the shown orientation as an example, the first straight line is parallel to the Y-axis direction, the first direction is the downward direction along the Y-axis (ie, the -Y direction), and the first plane is parallel to the X-axis.

[0048] Figure 3 for Figure 1 The structural diagram of the sliding pressure head is as follows: Figure 1 and Figure 3 As shown, the sliding pressure head 6 is arranged on one side of the cover plate jig 1 along the first straight line, and the cover plate opening 21 of the curved cover plate 2 in the cover plate jig 1 faces the side where the sliding pressure head 6 is located, that is, the sliding pressure head 6 is arranged on the outer side of the cover plate jig 1 along the first direction. Figure 1 Taking the illustrated position as an example, the sliding pressure head 6 is located below the cover plate fixture 1 .

[0049] The sliding press head 6 is used to carry the flexible display panel 3 and drive the flexible display panel 3 to fit the curved cover plate 2. Two sliding press heads 6 are provided, and the two sliding press heads 6 can approach and move away from each other along a second straight line perpendicular to the first straight line under the drive of the driving device. The second straight line is parallel to the first plane and parallel to the width direction of the cover plate opening 21 of the curved cover plate 2 in the cover plate jig 1.

[0050] During the bonding process of the flexible display panel 3 and the curved cover plate 2, the two sliding pressure heads 6 are first in a first position close to each other, the cover plate jig 1 moves toward the sliding pressure head 6 along a first direction, and the cover plate jig 1 moves to the position where the flat cover plate portion of the flexible display panel 3 and the curved cover plate 2 are bonded on the two sliding pressure heads 6 and then stops. The two sliding pressure heads 6 in the first position drive the flat cover plate portion of the flexible display panel 3 and the curved cover plate 2 to be bonded, that is, the flat area is bonded. At this time, the position of the cover plate jig 1 and the sliding pressure head 6 is defined as the bonding position;

[0051] Then the two sliding pressure heads 6 move away from each other along the second straight line to the second position, and the two sliding pressure heads 6 in the second position drive the flexible display panel 3 to press against the two curved cover parts in the curved cover plate 2 to achieve the bonding of the curved area, thereby completing the bonding of the flexible display panel 3 and the curved cover plate 2.

[0052] According to the above description, the two sliding press heads 6 in the first position are directly opposite to the opening of the curved cover plate 2 in the cover plate fixture 1, and the maximum distance between the two sliding press heads 6 in the first position on the second straight line should be smaller than the opening width of the curved cover plate 2 to allow the sliding press heads 6 to enter the interior of the curved cover plate 2 through the cover plate opening 21.

[0053] The sliding pressure head 6 also has the function of profiling the flexible display panel 3. The side of the sliding pressure head 6 that cooperates with the flexible display panel 3 is a profiling surface. By attaching the flexible display panel 3 to the profiling surface of the sliding pressure head 6, the flexible display panel 3 can be bent into the shape to be formed.

[0054] The two sliding pressure heads 6 are symmetrical structures relative to the first straight line. Take one of the sliding pressure heads 6 as an example. Figure 3 The sliding pressure head 6 includes a plane profiling surface 62, a curved profiling surface 63 and a bottom extension surface 64. The plane profiling surface 62 and the curved profiling surface 63 are collectively referred to as profiling surfaces. It can be understood that the plane profiling surfaces 62 and the curved profiling surfaces 63 in the two sliding pressure heads 6 constitute the profiling surface of the flexible display panel 3, and the plane profiling surface 62 and the curved profiling surface 63 in each sliding pressure head 6 are part of the profiling surface of the flexible display panel 3.

[0055] The planar profiling surface 62 is located on the side of the sliding pressure head 6 close to the planar cover plate portion, and is a plane parallel to the first plane, and is used to profile the planar display portion in the flexible display panel 3, and drive the flexible display panel 3 to fit with the planar cover plate portion. The end of the planar profiling surface 62 away from the other sliding pressure head 6 along the second straight line is connected to a curved profiling surface 63, and the curved profiling surface 63 is curved toward the side away from the cover plate jig 1, and is used to profile the curved display portion in the flexible display panel 3, and drive the flexible display panel 3 to fit with the curved cover plate portion.

[0056] The bottom plate extension surface is connected to the end of the curved profiling surface 63 away from the plane profiling surface 62, that is, the two ends of the curved profiling surface 63 are respectively connected to the plane profiling surface 62 and the bottom extension surface 64. The end of the curved profiling surface 63 away from the plane profiling surface 62 is the profiling end of the profiling surface, and the profiling end here refers to the position corresponding to the end of the curved display part in the flexible display panel 3 attached to the sliding pressure head 6. The bottom extension surface 64 continues to extend a certain distance from the profiling end toward the side away from the curved profiling surface 63, and the maximum distance of one end of the bottom extension surface 64 away from the curved profiling surface 63 along the second straight line from the outer edge of the curved profiling surface 63 is greater than the undercut depth of the curved cover plate 2 in the cover plate jig 1.

[0057] The sliding pressure head 6 includes a pressure head 67 and an elastic pad 61. The elastic pad 61 is attached to the outside of the pressure head 67. The outer side of the elastic pad 61 away from the pressure head 67 includes a plane profiling surface 62 and a curved profiling surface 63 that cooperate with the flexible display panel 3. The bottom extension surface 64 of the sliding pressure head 6 can be formed by the outer side of the elastic pad 61, or by the surface of the pressure head 67, or by the outer side of the elastic pad 61 and the surface of the pressure head 67. For example, in the present embodiment, the outer side of the elastic pad 61 exceeds the distance of one end of the profiling terminal, and the bottom extension surface 64 includes part of the outer side of the elastic pad 61 and part of the side of the pressure head 67.

[0058] The elastic pad 61 is used to buffer the impact force of the sliding pressure head 6 on the flexible display panel 3, and to compensate for the contact step difference between the sliding pressure head 6 and the curved cover plate 2 caused by the processing tolerance during lamination, thereby ensuring the quality of lamination between the flexible display panel 3 and the curved cover plate 2. The elastic pad 61 is usually made of an elastic material with uniform texture, good adsorption, and friction resistance, such as silicone and rubber.

[0059] In this embodiment, the elastic pad 61 is made of silicone, and the silicone is disposed on the outer side of the pressure head 67 by injection molding. In a possible implementation, the injection molding process includes: making a contour mold of the sliding pressure head 6 (including the pressure head 67 and the elastic pad 61); processing the surface of the pressure head 67 so that the side of the pressure head 67 in contact with the elastic pad 61 becomes a rough side that is not smooth, and the rough side can increase the friction between the pressure head 67 and the elastic pad 61, so as to facilitate the fixing of the elastic pad 61; installing the pressure head 67 into the contour mold, at which time a molding space for the elastic pad 61 is formed between the pressure head 67 and the contour mold; filling the silicone raw material into the molding space between the contour mold and the pressure head 67; placing the contour mold with the silicone raw material and the pressure head 67 in a high temperature environment until the rubber is formed.

[0060] The elastic pad 61 is connected to the pressure head 67 by injection molding, and the elastic pad 61 and the pressure head 67 can be fixedly connected without using adhesive, and the connection is more reliable than adhesive; and the elastic pad 61 has a higher molding accuracy, so that the accuracy of the contouring surface is higher. Obviously, the elastic pad 61 can also be fixedly connected to the pressure head 67 by using adhesive.

[0061] In the bonding device in the embodiment of the present application, the two sliding pressure heads 6 are each provided with a separate elastic pad 61, that is, the elastic pad 61 adopts a split structure. Such a design can avoid the problem of the integrated elastic pad 61 being repeatedly stretched and affecting the use time, and can also overcome the problem of insufficient stretching, thereby being suitable for the bonding of a large-angle curved cover plate 2 with a large undercut depth and a flexible display panel 3; the split design can also be used repeatedly, reducing the cost of the bonding equipment and improving reliability.

[0062] One end of the bottom extension surface 64 away from the curved contour surface 63 along the first straight line is connected to a slider connection surface 66 . The slider connection surface 66 extends from the end of the bottom extension surface 64 along the first direction and is connected to the bottom extension surface 64 via a rounded corner 65 .

[0063] In this embodiment, the laminating device realizes the profiling of the flexible display panel 3 on the sliding pressure head 6 through the guide film (Guide Film) technology. The flexible display panel 3 is pasted on one side of the carrier film 5. The carrier film 5 drives the flexible display panel 3 to move and bend. The flexible display panel 3 realizes profiling with the movement of the carrier film 5.

[0064] The carrier film 5 can be a sticky film or a non-sticky ordinary film. For ordinary films, the flexible display panel 3 can be adhered to the carrier film 5 by adhesive adhesives such as double-sided adhesive tape. For example, the carrier film 5 can be a PET (Polyethylene terephthalate) film, which has the characteristic of being stretchable, and the flexible display panel 3 is adhered to the PET film using double-sided adhesive tape. After the flexible display panel 3 and the curved cover plate 2 are bonded, the double-sided adhesive tape can easily separate the PET film and the flexible display panel 3, without destroying the bonding effect of the flexible display panel 3 and the curved cover plate 2, and without causing damage to the flexible display panel 3.

[0065] The laminating device further includes a guiding mechanism for driving the carrier film 5 to move so as to achieve contouring of the flexible display panel 3 . The guiding mechanism includes two guiding clamps 4 . The two guiding clamps 4 are respectively used to fix and guide the ends of the carrier film 5 .

[0066] In the process of guiding the carrier film 5 to move to realize the profiling of the flexible display panel 3 by the guiding mechanism, firstly, the two guiding clamps 4 are located above the two sliding pressure heads 6 in the first position and outside the two sliding pressure heads 6 along the second straight line. The two guiding clamps 4 fix the two ends of the carrier film 5 and tension them, so that the carrier film 5 is a plane parallel to the planar profiling surface 62, and the flexible display panel 3 is located on the side of the carrier film 5 away from the sliding pressure heads 6;

[0067] Subsequently, the two guide clamps 4 move along the first straight line toward the sliding head. After the guide clamps 4 pass over the planar contour surface 62 on the outside of the sliding head 6, the sliding head 6 lifts up the supporting film 5, and the side of the supporting film 5 facing away from the flexible display panel 3 is in contact with the planar contour surface 62 and the partially curved contour surface 63 of the sliding head 6. The two guide clamps 4 then approach each other, move to the contour position, and stop.

[0068] In order to meet the profiling angle of the flexible display panel 3, and in order to avoid the end of the flexible display panel 3 from contacting the curved cover plate 2 too early and affecting the fitting quality during the movement of the sliding pressure head 6 from the first position to the second position, the guiding mechanism guides the carrying film 5 so that the flexible display panel 3 completes the profiling at least when the sliding pressure head 6 moves to the second position, that is, the guiding mechanism in the profiling position drives the flexible display panel 3 to fit and emulate the sliding pressure head 6 between the first position and the second position.

[0069] Figure 4 A guide fixture 4 provided in an embodiment of the present application is shown. Figure 1 and Figure 4 As shown, the guide fixture 4 includes a guide member 42, a connecting member 44 and a fixing member 41. Figure 4The connecting member 44 is arranged above the fixing member 41 and extends parallel to the fixing member 41. One end of the connecting member 44 in the extending direction is flush with the fixing member 41, and the other end exceeds the fixing member 41. The guiding member 42 is arranged at the end of the connecting member 44 that exceeds the fixing member 41. The guiding member 42 extends from the connecting member 44 in a direction perpendicular to the connecting member 44 and away from the fixing member 41, that is, the guiding member 42 and the connecting member 44 form an L-shaped structure. The end of the guiding member 42 away from the connecting member 44 has a contact portion that contacts the carrier film 5.

[0070] The guide fixture 4 in the contouring position is located below the bottom extension surface 64 of the sliding press head 6, the fixing member 41 and the connecting member 44 are below the cover plate fixture 1 and the curved cover plate 2 in the fitting position, and the guide member 42 extends in the gap between the sliding press head 6 and the cover plate fixture 1 and the curved cover plate 2.

[0071] The path for guiding the carrier film 5 by the guide clamp 4 in the profiling position is as follows: the carrier film 5 extends from the profiling end of the curved profiling surface 63 to the contact end 43, the carrier film 5 extends around the contact end 43 to the side of the guide member 42 close to the other guide clamp 4, and extends along the guide member 42 to the connecting member 44, and bends and extends between the connecting member 44 and the fixing member 41. The connecting member 44 and the fixing member 41 are fixed positions for clamping the end of the carrier film 5, thereby achieving clamping and fixing of the carrier film 5.

[0072] The contact position of the contact end 43 with the carrier film 5 when the guiding mechanism moves to the contouring position is defined as the guiding position. In order to enable the guiding mechanism in the contouring position to drive the flexible display panel 3 and the sliding pressure head 6 between the first position and the second position to complete the fitting contouring, the guiding position is located at the end section tangent to the contouring end of the sliding pressure head 6 when the sliding pressure head 6 is in the second position, or between the end section and the planar contouring surface 62.

[0073] Since the bottom extension surface 64 is located at the end cut surface or is closer to the plane contour surface 62 than the end cut surface, the contact end 43 can press the carrier film 5 against the bottom extension surface 64 of the sliding press head 6 when the sliding press head 6 is in the second position.

[0074] In this embodiment, when the guide mechanism moves to the contour position, the contact end 43 presses the carrier film 5 against the connection position between the bottom extension surface 64 and the slider connection surface 66, that is, the guide position is located at the connection position between the bottom extension surface 64 and the sliding connection when the sliding ram 6 moves to the second position. The slider connection surface 66 and the bottom extension surface 64 can be connected by a chamfer 65. In this case, the contact end 43 is an arc protrusion that matches the chamfer 65. Further, the arc diameter of the contact end 43 is equal to the difference between the diameter of the chamfer 65 and the thickness of the carrier film 5.

[0075] The guiding mechanism in the embodiment of the present application is designed in such a way as to ensure that the fitting and profiling of the flexible display panel 3 and the contoured surface is completed at the latest when the sliding pressure head 6 moves to the second position, thereby avoiding premature contact and interference between the flexible display panel 3 and the curved cover plate 2, and ensuring the fitting quality of the flexible display panel 3 and the curved cover plate 2.

[0076] Figures 5 to 8 A schematic diagram of a bonding device in the working process provided in an embodiment of the present application, such as Figures 5 to 8 As shown, the working process of the laminating device is as follows:

[0077] Please refer to Figure 5 , the guiding fixture 4 in the guiding mechanism moves to the profiling position, driving the carrying film 5 to profile on the sliding pressure head 6;

[0078] Please refer to Figure 6 The cover plate fixture 1 drives the curved cover plate 2 to move to the fitting position along the first direction, and the two sliding pressure heads 6 in the first position enter the interior of the curved cover plate 2 from the cover plate opening 21, and the flat contour surface 62 of the sliding pressure head 6 drives the flexible display panel 3 to be pressed against the flat cover plate part.

[0079] Please refer to Figure 7 , the two sliding pressure heads 6 move away from each other along the second straight line to the second position, and the curved contour surface 63 of the sliding pressure head 6 drives the flexible display panel 3 to fit with the upper part of the curved cover plate 2;

[0080] Please refer to Figure 8 , the cover plate fixture 1 is lifted up, and the two sliding pressure heads 6 are slightly retracted, and the flexible display panel 3 and the curved cover plate 2 are in the lower part.

[0081] In the above embodiment, the two sliding rams 6 are fixed on the first straight line, and the guiding mechanism and the cover plate fixture 1 move relative to the two sliding rams 6. However, the embodiments of the present application are not limited to this. Based on the inventive concept of the above embodiment, the sliding ram 6 can be designed to be able to move along the first straight line.

[0082] In the description of the embodiments of the present application, it should be noted that the terms "center", "upper", "lower", "left", "right", "vertical", "horizontal", "inner", "outer", etc., indicating the orientation or positional relationship, are based on the orientation or positional relationship shown in the drawings, and are only for the convenience of describing the present application and simplifying the description, rather than indicating or implying that the device or element referred to must have a specific orientation, be constructed and operated in a specific orientation, and therefore cannot be understood as a limitation on the present application. In addition, the terms "first", "second", and "third" are used for descriptive purposes only and cannot be understood as indicating or implying relative importance.

[0083] In the description of the embodiments of the present application, it should be noted that, unless otherwise clearly specified and limited, the terms "installed", "connected", and "connected" should be understood in a broad sense, for example, it can be a fixed connection, a detachable connection, or an integral connection; it can be a mechanical connection or an electrical connection; it can be a direct connection, or it can be indirectly connected through an intermediate medium, or it can be the internal communication of two components. For ordinary technicians in this field, the specific meanings of the above terms in the embodiments of the present application can be understood according to specific circumstances.

[0084] In addition, the technical features involved in the different embodiments of the present application described above can be combined with each other as long as they do not conflict with each other.

[0085] So far, the technical solutions of the present application have been described in conjunction with the preferred embodiments shown in the accompanying drawings. However, it is easy for those skilled in the art to understand that the protection scope of the present application is obviously not limited to these specific embodiments. Without departing from the principles of the present application, those skilled in the art can make equivalent changes or substitutions to the relevant technical features, and the technical solutions after these changes or substitutions will fall within the protection scope of the present application.

Claims

1. A laminating device, characterized in that: It comprises two sliding pressure heads which can approach and move away from each other, and the two sliding pressure heads press the flexible display panel against the fitting surface of the curved cover plate when moving away from each other, and each of the sliding pressure heads comprises an elastic pad for carrying the flexible display panel; The sliding pressure head includes a bottom extension surface and a slider connecting surface, the flexible display panel is attached to the carrier film, the attaching device includes a guiding mechanism for guiding the movement of the carrier film, the guiding mechanism has a contour position during movement, the guiding mechanism includes a contact end, and the contact end presses the carrier film against the connection position between the bottom extension surface and the slider connecting surface when the guiding mechanism moves to the contour position.

2. The laminating device according to claim 1, characterized in that: The sliding pressure head comprises a pressure head portion and the elastic pad fixedly attached to the pressure head portion, and the side surface of the pressure head portion contacting the elastic pad is a rough surface that is not smooth.

3. The laminating device according to claim 2, characterized in that: The elastic pad is made of silica gel or rubber.

4. The laminating device according to claim 3, characterized in that: The elastic pad is made of silicone and is injection-molded on the pressure head.

5. The laminating device according to any one of claims 1 to 4, characterized in that: The two sliding pressure heads have a first position for laminating a flat area and a second position for laminating a curved area; the sliding pressure head has a contouring surface, and the guiding mechanism at the contouring position drives the flexible display panel to conform to the contouring surface through the carrying film.

6. The laminating device according to claim 5, characterized in that: The guiding mechanism at the profiling position drives the flexible display panel to conform to the sliding pressure head between the first position and the second position.

7. The laminating device according to claim 5, characterized in that: The profiling surface includes a plane profiling surface and a curved profiling surface, one end of the curved profiling surface is connected to the plane profiling surface, and the other end of the curved profiling surface is a profiling end; the contact end is in contact with the carrier film extending from the curved profiling surface, and the contact position of the contact end with the carrier film when the guide mechanism moves to the profiling position is the guiding position, and the guiding position is located at the end section tangent to the profiling end when the sliding pressure head is in the second position, or between the end section and the plane profiling surface.

8. The laminating device according to claim 7, characterized in that: The bottom extension surface extends from the profiling end toward a side away from the curved profiling surface; The bottom extension surface coincides with the end cut surface, or is closer to the plane contour surface than the end cut surface; the guide position coincides with the bottom extension surface when the sliding pressure head moves to the second position.

9. The laminating device according to claim 8, characterized in that: The slider connecting surface is connected to one end of the bottom extension surface away from the curved contour surface, and extends from the bottom extension surface in a direction away from the planar contour surface; the guide position is located at the connection position between the bottom extension surface and the slider connecting surface when the sliding pressure head moves to the second position.

10. The laminating device according to claim 9, characterized in that: A chamfer is connected between the slider connection surface and the bottom extension surface; and the contact end is an arc protrusion matched with the chamfer.

11. The laminating device according to claim 10, characterized in that: The arc diameter of the contact end is equal to the difference between the fillet diameter and the thickness of the carrier film.

12. The laminating device according to claim 7, characterized in that: The guiding mechanism includes a guiding fixture corresponding to the sliding pressure head, and the guiding fixture includes a guiding member extending perpendicular to the movement direction of the sliding pressure head. When the guiding mechanism moves to the profiling position, one end of the guiding member close to the profiling surface is a contact end in contact with the supporting film.

13. The laminating device according to claim 12, characterized in that: One end of the guide member away from the contact end is connected with a connecting member, and the connecting member extends from the guide member along a movement direction of the corresponding sliding pressure head away from the other sliding pressure head.

14. The laminating device according to claim 13, characterized in that: The guiding fixture further comprises a fixing member extending parallel to the connecting member, wherein the fixing member is arranged on a side of the connecting member opposite to the guiding member; the fixing member cooperates with the connecting member to clamp the carrying film.

15. The laminating device according to claim 14, characterized in that: The bonding device includes a cover plate jig arranged on the side of the flat contour surface, the cover plate jig fixes the curved cover plate, and at least one of the cover plate jig and the sliding pressure head can move toward the other side. During the movement, there is a bonding position in which the sliding pressure head enters the interior of the curved cover plate for bonding; the guide extends into the gap between the curved cover plate and the sliding pressure head at the bonding position.

16. The laminating device according to claim 15, characterized in that: The connecting piece is located outside the curved cover plate and the cover plate fixture which are in the fitting position.

17. The laminating device according to claim 15, characterized in that: The cover plate fixture is provided with a cover plate groove for accommodating the curved cover plate.

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