CN114999325B - Bonding device and bonding method - Google Patents
Bonding device and bonding method Download PDFInfo
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- CN114999325B CN114999325B CN202210688877.9A CN202210688877A CN114999325B CN 114999325 B CN114999325 B CN 114999325B CN 202210688877 A CN202210688877 A CN 202210688877A CN 114999325 B CN114999325 B CN 114999325B
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- 238000000034 method Methods 0.000 title claims abstract description 20
- 238000010030 laminating Methods 0.000 claims abstract description 38
- 230000000149 penetrating effect Effects 0.000 claims abstract description 4
- 238000005452 bending Methods 0.000 claims description 62
- 230000008093 supporting effect Effects 0.000 claims description 33
- 230000001681 protective effect Effects 0.000 claims description 22
- 239000013013 elastic material Substances 0.000 claims description 5
- 238000003825 pressing Methods 0.000 claims description 5
- 238000003475 lamination Methods 0.000 claims description 4
- 230000036961 partial effect Effects 0.000 claims description 2
- 229920001296 polysiloxane Polymers 0.000 claims 1
- 239000011241 protective layer Substances 0.000 claims 1
- 239000012858 resilient material Substances 0.000 claims 1
- 238000002360 preparation method Methods 0.000 abstract description 4
- 230000002411 adverse Effects 0.000 abstract description 2
- 210000000746 body region Anatomy 0.000 description 21
- 230000002829 reductive effect Effects 0.000 description 9
- 239000004642 Polyimide Substances 0.000 description 4
- 229920001721 polyimide Polymers 0.000 description 4
- VYPSYNLAJGMNEJ-UHFFFAOYSA-N Silicium dioxide Chemical compound O=[Si]=O VYPSYNLAJGMNEJ-UHFFFAOYSA-N 0.000 description 3
- 239000000853 adhesive Substances 0.000 description 3
- 230000001070 adhesive effect Effects 0.000 description 3
- 238000010586 diagram Methods 0.000 description 3
- 238000004519 manufacturing process Methods 0.000 description 3
- 239000000741 silica gel Substances 0.000 description 3
- 229910002027 silica gel Inorganic materials 0.000 description 3
- 230000000694 effects Effects 0.000 description 2
- 238000001125 extrusion Methods 0.000 description 2
- 239000002390 adhesive tape Substances 0.000 description 1
- 238000005520 cutting process Methods 0.000 description 1
- 230000005489 elastic deformation Effects 0.000 description 1
- 238000005538 encapsulation Methods 0.000 description 1
- 230000000670 limiting effect Effects 0.000 description 1
- 239000000463 material Substances 0.000 description 1
- 238000012986 modification Methods 0.000 description 1
- 230000004048 modification Effects 0.000 description 1
- 230000003287 optical effect Effects 0.000 description 1
- 238000006467 substitution reaction Methods 0.000 description 1
Classifications
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- G—PHYSICS
- G09—EDUCATION; CRYPTOGRAPHY; DISPLAY; ADVERTISING; SEALS
- G09F—DISPLAYING; ADVERTISING; SIGNS; LABELS OR NAME-PLATES; SEALS
- G09F9/00—Indicating arrangements for variable information in which the information is built-up on a support by selection or combination of individual elements
- G09F9/30—Indicating arrangements for variable information in which the information is built-up on a support by selection or combination of individual elements in which the desired character or characters are formed by combining individual elements
- G09F9/301—Indicating arrangements for variable information in which the information is built-up on a support by selection or combination of individual elements in which the desired character or characters are formed by combining individual elements flexible foldable or roll-able electronic displays, e.g. thin LCD, OLED
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- Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
- Y02—TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINST CLIMATE CHANGE
- Y02P—CLIMATE CHANGE MITIGATION TECHNOLOGIES IN THE PRODUCTION OR PROCESSING OF GOODS
- Y02P70/00—Climate change mitigation technologies in the production process for final industrial or consumer products
- Y02P70/50—Manufacturing or production processes characterised by the final manufactured product
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- Physics & Mathematics (AREA)
- General Physics & Mathematics (AREA)
- Engineering & Computer Science (AREA)
- Theoretical Computer Science (AREA)
- Laminated Bodies (AREA)
Abstract
The invention provides a laminating device and a laminating method, which are used for laminating a flexible body and a curved cover plate, wherein the laminating device comprises: the flexible body comprises a flexible body and a guide film used for bearing the flexible body, wherein the guide film comprises a first area, a second area surrounding the outer side of the first area and a third area surrounding the outer side of the second area, and an opening penetrating through the guide film along the thickness direction of the guide film is formed in the second area. Through set up the opening in the second region of guide film, can reduce the area of contact of the second region of guide film and the flexible body to reduce the adhesion between them, avoid bringing up the rete on the flexible body and the adverse phenomena such as flexible body rete stripping that produces because of the interference of guide film and curved surface apron, and then improve curved surface display panel's preparation yield and product performance.
Description
Technical Field
The invention relates to a bonding device and a bonding method, and belongs to the field of preparation of flexible screen display panels.
Background
The curved display screen is widely applied gradually, in the preparation process of the curved display screen, the guiding film is generally adopted to bear the flexible body and move towards the curved cover plate so as to attach the flexible body to the curved cover plate, however, as the curved cover plate is of a curved structure, the edge bending area of the curved cover plate can interfere with the guiding film, so that the guiding film brings up the film layer structure on the flexible body, and adverse phenomena such as stripping among film layers are generated, and the follow-up procedure and the product performance are affected.
Disclosure of Invention
The invention provides a laminating device and a laminating method, which at least solve the technical problems that a guiding film in the prior art is easy to bring up a film structure on a flexible body, and the film is peeled off and other bad phenomena are caused by the guiding film.
In one aspect of the present invention, there is provided a bonding apparatus for bonding a flexible body to a curved cover plate, including: the flexible body comprises a flexible body and a guide film used for bearing the flexible body, wherein the guide film comprises a first area, a second area surrounding the outer side of the first area and a third area surrounding the outer side of the second area, and at least one opening penetrating through the guide film along the thickness direction of the guide film is formed in the second area.
In one embodiment of the invention, the second region has a plurality of support bars, each two adjacent support bars being separated by one of the openings.
In one embodiment of the invention, the number of support bars is four.
In an embodiment of the present invention, the plurality of support bars are uniformly distributed in the second area.
In an embodiment of the present invention, the third area has a plurality of side walls connected in sequence, one side wall is connected to one of the supporting bars, or one supporting bar is connected to an intersection of every two adjacent side walls.
In an embodiment of the invention, the shape of the opening comprises a semi-ring shape or a polygon shape.
In an embodiment of the invention, the attaching device further includes an attaching top block for pushing the guiding film carrying the flexible body to move towards the curved cover plate and pressing the flexible body to the curved cover plate; the laminating kicking block is used for with the top surface that the guide film contacted with pass through the cambered surface and be connected between the side of laminating kicking block.
In an embodiment of the present invention, the attaching top block is made of an elastic material.
In an embodiment of the invention, the elastic material includes silica gel.
In an embodiment of the present invention, the flexible body includes a profiled region, and after the flexible body is attached to the curved cover plate, the profiled region forms a first bending region corresponding to a position of an edge bending region of the curved cover plate; before the lamination, a gap for storing the first bending area is reserved between the lamination top block and the edge bending area of the curved surface cover plate.
In one embodiment of the present invention, the flexible body includes a screen body, a first support film provided on a side of the screen body facing the guide film, and a protective film provided on a side of the first support film facing the guide film; the curved surface cover plate comprises a first main body area and an edge bending area which is arranged on the outer side of the first main body area in a surrounding mode, and a breaking edge used for stripping the protective film from the first supporting film is arranged on the portion, corresponding to the first main body area, of the protective film.
In another aspect of the present invention, there is provided a bonding method including:
providing a curved cover plate, a flexible body and the attaching device;
placing the flexible body on one side of the guide film of the laminating device, which faces the curved cover plate; wherein at least a partial region of the second region of the guide film is brought into contact with the flexible body;
and enabling the guide film to bear the flexible body to move towards the curved cover plate so as to attach the flexible body to the curved cover plate.
According to the invention, the opening is arranged in the second area of the guide film, so that the contact area between the second area of the guide film and the flexible body can be reduced, the binding force between the second area of the guide film and the flexible body is reduced, and further the phenomena that the film layer structure on the flexible body is brought up and the film layer of the flexible body is peeled off due to the interference of the edge bending area of the guide film and the curved cover plate in the attaching process are avoided, thus the subsequent process is facilitated, and the manufacturing yield and performance of the curved display screen product are improved.
Drawings
FIG. 1 is a schematic structural view of a bonding apparatus according to an embodiment of the present invention;
FIG. 2 is a schematic view of a film layer structure formed by a guide film and a flexible body from a side of the guide film according to an embodiment of the invention;
FIG. 3 is a schematic view of a film layer structure formed by a guiding film and a flexible body from a side of the guiding film in a top view according to an embodiment of the invention;
FIG. 4 is a schematic diagram showing a relative positional relationship between a bonding top block and an edge bending region of a curved cover plate according to an embodiment of the present invention;
FIG. 5 is a schematic diagram of a structure of a flexible body and a curved cover plate after being attached according to an embodiment of the present invention;
FIG. 6 is a schematic view of a flexible body according to an embodiment of the present invention before fitting;
fig. 7 is a schematic structural diagram of a flexible body and a curved cover plate after being attached according to an embodiment of the present invention.
Reference numerals illustrate:
1: attaching a top block; 11: a top surface; 12: a cambered surface; 13: a side surface; 2: a guide film; 21: a first region; 221: an opening; 222: a support bar; 23: a third region; 3: a pressing table; 4: a clamping assembly; 5: a curved cover plate; 51: a first body region; 52: an edge bending region; 6: a screen body; 61: a second body region; 62: a second bending region; 631: a first connection region; 632: a second connection region; 7: an OCA layer; 8: a polarizer; 91: a first support film; 92: a second support film; 10: a flexible body; 101: a third body region; 102: a profiled region; a first epitaxial region 103;100: an integrated circuit; 104: a BPL layer; 105: a protective film; 1051: a breaking edge; 106: the adhesive tape is easy to tear; a: a gap.
Detailed Description
The bonding apparatus and the bonding method according to the present invention will be described in more detail with reference to the following examples and drawings.
The curved display screen of the embodiment of the invention can specifically comprise a 3D flexible display screen/a four-curved display screen, but is not limited to the three-dimensional flexible display screen.
As shown in fig. 5, the curved display screen includes a curved cover plate 5, and a flexible display module attached to the curved cover plate 5, where the curved cover plate 5 is of a curved structure, and includes a first main body area 51, and an edge bending area 52 surrounding the outside of the first main body area 51, a groove surrounded by the first main body area 51 and the edge bending area 52 is formed on one surface (attaching surface) attached to the flexible display module, and the flexible display module is attached to the groove.
The bonding surface of the first main body area 51 of the curved cover plate 5 is a plane, and the bonding surface of the edge bending area 52 is a curved surface.
The flexible display module is a multi-film structure, and comprises a transparent optical adhesive (OCA) layer 7, a Polaroid (POL) 8, a screen body (Panel) 6 and a first supporting film 91 which are sequentially laminated.
The screen 6 may specifically include a screen 6 encapsulated by a COP (Chip On Pi) encapsulation process, which may be a material of a conventional screen 6 in the art, for example, including Polyimide (PI) and the like.
In general, the screen body 6 includes a second body region 61, a second bending region 62 connected to the second body region 61, and a second extension region connected to a side of the second bending region 62 away from the second body region 61, where the second body region 61 is attached to the curved cover plate 5 in a groove, and the second bending region 62 corresponds to the edge bending region 52 of the curved cover plate 5 in position and bends relative to the second body region 61, so that the second extension region connected to the side of the second bending region 62 away from the second body region 61 is located outside the groove of the curved cover plate 5.
Wherein the second epitaxial region is provided with an Integrated Circuit (IC) 100, which may be used for binding a flexible circuit board (FPC), for example a driving flexible circuit board (D-FPC).
Typically, the second bending region 62 is a region where the electrical connection components of the screen body 6 are located, in which there are signal traces (typically in the shape of a twist, and thus also referred to as a twist), which are used for connecting with, for example, an FPC.
Specifically, the second bending region 62 forms an angle with the second body region 61/second epitaxial region, and the second body region 61 is substantially parallel to the extending direction of the second epitaxial region.
The second extension region includes a first connection region 631 connected to the second bending region 62, and a second connection region 632 connected to a side of the first connection region 631 facing away from the second bending region 62, the first connection region 631 being connected to the edge bending region 52 of the curved cover plate 5, in particular, to an end surface of the edge bending region 52 (the end surface being parallel to a surface of the first body region 51), the second connection region 632 extending beyond an outer edge of the curved cover plate 5, and the FPC being in particular, bound to the second connection region 632.
In addition, the OCA layer 7, the polarizer 8, and the first supporting film 91 are all disposed in the second main body region 61 of the screen body 6, but do not extend to the second bending region 62 of the screen body 6, which is generally disposed in the groove of the curved cover plate 5, so that the thickness of the flexible display module in the second bending region 62 of the screen body 6 is smaller than that in the second main body region 61 of the screen body 6.
To protect the screen 6, a supporting adhesive (BPL) layer 104 may be disposed on a side of the second bending region 62 of the screen 6 facing the curved cover 5, that is, the BPL layer 104 and the polarizer 8 are located on the same side of the screen 6.
Specifically, one end of the BPL layer 104 extends to the second main body region 61 of the screen body 6 and contacts with the polarizer 8, and the other end extends to the end face of the edge bending region 52 of the curved cover plate 5, that is, extends between the first connection region 631 of the second extension region and the curved cover plate 5, so that the first connection region 631 of the second extension region is connected to the curved cover plate 5 through the BPL layer 104.
In addition, the second extension area of the screen body 6 is further provided with a second supporting film 92, and the second supporting film 92 may specifically be disposed on a side of the second extension area facing away from the curved cover plate 5, and the integrated circuit 100 is disposed on a side of the second extension area facing away from the second supporting film 92.
Laminating flexible display module assembly and curved surface apron 5 is the important step of preparation curved surface display screen, before laminating, and one side that first backing film 91 deviates from screen body 6 still is equipped with protection film 105 (as shown in fig. 6), forms the flexible body of waiting to laminate.
Specifically, the flexible body has a third body region 101, a allotropic region 102, and a first epitaxial region 103 which are sequentially connected, wherein the third body region 101 includes an OCA layer 7, a polarizer 8, a second body region 61, a first supporting film 91, and a protective film 105 which are sequentially stacked, that is, the third body region 101 corresponds to the second body region 61 in position; the position of the special-shaped area 102 corresponds to that of the second bending area 62, after the flexible body is attached to the curved cover plate 5, the special-shaped area 102 forms a first bending area corresponding to that of the edge bending area of the curved cover plate, and the first bending area comprises the second bending area 62 and a BPL layer 104 arranged in the second bending area 62; the first epitaxial region 103 comprises a second epitaxial region, i.e. the first epitaxial region 103 corresponds in position to the second epitaxial region.
When the flexible body is attached, a guide film 2 is generally arranged on one surface of the flexible body, which is away from the curved cover plate 5, so that the flexible body is prevented from being directly clamped by a clamping assembly 4 of a machine table (attaching device), and the screen body is poor.
The OCA layer 7 is located on a side of the flexible body facing the curved cover 5 for adhering the flexible display module to the curved cover 5, and the protective film 105 is located on a side of the flexible body facing the guide film 2, that is, the protective film 105 contacts the guide film 2.
Because the curved surface apron 5 is curved surface structure, its laminating face is formed with the recess, flexible display module assembly laminating is in the recess of curved surface apron 5, when lower platform (laminating kicking block 1) pushes away the guide film 2 that bears the flexible body along the direction towards curved surface apron 5 in order to carry out the laminating of flexible body and curved surface apron 5, guide film 2 can push up the marginal bending zone 52 (i.e. the lateral wall of recess) of curved surface apron 5, the two takes place to interfere, curved surface apron 5 produces stronger pushing action to guide film 2, thereby lead to guide film 2 to take up the rete on the flexible body easily, especially be liable to take up the protection film 105 with guide film 2 contact, take place the peeling off of protection film 105 and support film etc. phenomenon, influence the manufacturing yield and the product performance of follow-up process and curved surface display screen.
In view of the foregoing, an embodiment of the present invention provides a bonding apparatus for bonding a flexible body to a curved cover plate 5, as shown in fig. 1, where the bonding apparatus includes a bonding stage 3, a guiding film 2, a clamping assembly 4, and a bonding top block 1, the bonding stage 3 is provided with a receiving groove for receiving the curved cover plate 5, the guiding film 2 is used for carrying the flexible body, the clamping assembly 4 is used for clamping the guiding film 2, and the bonding top block 1 is used for pushing the guiding film 2 carrying the flexible body to move toward the curved cover plate 5, and bonding the flexible body to the curved cover plate 5, so as to bond the flexible body/flexible display module with the curved cover plate 5.
In specific implementation, the curved cover plate 5 is placed in the accommodating groove of the pressing platform 3, the flexible body is placed on the guide film 2, the laminating top block 1 pushes the guide film 2 bearing the flexible body to move towards the curved cover plate 5, and after the flexible body contacts with the curved cover plate 5, the flexible body and the curved cover plate 5 are pressed together, so that the flexible body and the curved cover plate 5 are laminated.
The guide film 2 includes a first region 21, a second region surrounding the first region 21, and a third region 23 surrounding the second region, wherein the second region is provided with at least one opening 221 penetrating the guide film 2 along the thickness direction of the guide film 2.
Specifically, the clamping component 4 can specifically clamp the third region 23 of the guide film 2, and tighten the guide film 2, so that the guide film 2 and the flexible body carried on the guide film 2 are in a tensioned state, and wrinkling and other phenomena are avoided.
The second area and the first area 21 are used for being in contact with the flexible body to bear the flexible body, and the opening 221 is arranged in the second area, so that the contact area between the second area of the guiding film 2 and the flexible body can be reduced, the adhesive force between the guiding film 2 and the protecting film 105 of the flexible body can be further reduced, and the phenomena that the film layer structure (especially the protecting film 105) of the flexible body is brought up, and peeling (such as peeling of the protecting film 105 and the supporting film) between the film layers of the flexible body is caused by the interference of the guiding film 2 and the edge bending area 52 of the curved cover plate 5 are avoided.
At least a part of the second area may specifically be in contact with the third body area 101 of the flexible body, and as illustrated in fig. 2 and 3, the first area 21 and the third body area 101 of the guiding film 2 are respectively circular and coaxially arranged, and the diameter of the first area 21 is smaller than that of the third body area 101, so that a part of the third body area 101 is in contact with the first area 21 and the rest of the area is in contact with the second area.
In general, at least a part of the second area of the guiding film 2 corresponds to the edge bending area 52 of the curved cover plate 5, so that the interference area between the second area of the guiding film 2 and the edge bending area 52 of the curved cover plate 5 can be reduced, the pushing and resisting force of the edge bending area 52 of the curved cover plate 5 on the guiding film 2 is reduced, and the risk that the guiding film 2 brings up the film layer (such as the protecting film 105) on the flexible body and the film layer of the flexible body is peeled off due to the pushing and resisting force is further reduced.
Specifically, the second area has a plurality of support bars 222, each two adjacent support bars 222 are separated by an opening 221, opposite ends of each support bar 222 are respectively connected with the first area 21 and the third area 23 (i.e. one end of each support bar is connected with the first area 21, and the other end of each support bar is connected with the third area 23), so that effects of avoiding phenomena such as lifting of a film layer structure of the flexible body by the guide film 2 and film peeling of the flexible body caused by the film layer structure can be improved, strength of the guide film 2 can be improved, bearing and supporting effects of the flexible body on the flexible body can be improved, and meanwhile, phenomena such as breakage of the guide film 2 can be avoided in a subsequent tearing process of the guide film 2 after the flexible body and the curved cover plate 5 are attached, and manufacturing efficiency and yield of curved display screen products can be further improved.
Wherein the guide film 2 may be integrally formed, and the support bar 222 may be a connection structure extending from the first region 21 to the third region 23.
In addition, the number of the openings 221 is plural, and each two adjacent openings 221 are spaced apart by one support bar 222.
The shape of the opening 221 may be a semi-ring shape or a polygon, for example, a quadrangle, such as a square.
Specifically, when the second area is provided with a plurality of openings 221, the shapes of the plurality of openings 221 may be the same or different, for example, each of the plurality of openings 221 is a semi-ring shape or a polygon, or one or more of the plurality of openings 221 is a semi-ring shape, and the rest is a polygon.
Preferably, the plurality of support bars 222 are uniformly distributed in the second area, and the plurality of openings 221 are also uniformly distributed in the second area.
In some preferred embodiments, as shown in fig. 2 and 3, the number of the support bars 222 is four, and the four support bars 222 are uniformly distributed in the second area.
Specifically, the third area 23 has a plurality of side walls connected in sequence, one side wall is connected to one supporting bar 222, and specifically, the middle position of the side wall is connected to the supporting bar 222 (i.e. the distance from the connecting position of the side wall and the supporting bar 222 to the opposite ends of the side wall is substantially equal); alternatively, one brace bar 222 is connected at the intersection of each two adjacent side walls.
The number of side walls of the third region 23 may be the same as the number of support bars 222 of the second region, and a first angle is formed between each two adjacent/connected side walls, for example, about 90 °, i.e., each two adjacent/connected side walls are substantially vertical.
In some embodiments, the number of support bars 222 in the second region is four, i.e., including first support bar 222, second support bar 222, third support bar 222, and fourth support bar 222, respectively, and the number of side walls in third region 23 is four, i.e., including first side wall, second side wall, third side wall, and fourth side wall, respectively, that are connected in sequence. Wherein, the first supporting bar 222 is connected with the middle position of the first side wall, the second supporting bar 222 is connected with the middle position of the second side wall, and the third supporting bar 222 is connected with the middle position of the third side wall, at this time, the guiding film 2 forms a cross structure through four supporting bars 222 (as shown in fig. 2).
Alternatively, the intersection of the first side wall and the second side wall is connected to the first support bar 222, the intersection of the second side wall and the third side wall is connected to the second support bar 222, the intersection of the third side wall and the fourth side wall is connected to the third support bar 222, and the intersection of the fourth side wall and the first side wall is connected to the fourth support bar 222, at this time, the guide film 2 is formed in an "X" shape structure by the four support bars 222 (as shown in fig. 3).
Wherein, the extending direction of the first supporting bar 222 is substantially parallel to the extending direction of the third supporting bar 222, the extending direction of the second supporting bar 222 is substantially parallel to the extending direction of the fourth supporting bar 222, and a second included angle is formed between the extending direction of the first supporting bar 222/the third supporting bar 222 and the extending direction of the second supporting bar 222/the fourth supporting bar 222, and the second included angle is, for example, 90 °.
The shape of the guide film 2 may be a polygon or a circle, and the polygon may specifically include a quadrangle, such as a square or rectangle, or the like.
Specifically, the guide film 2 may be a polygonal structure formed by sequentially connecting the above-described plurality of side walls, for example, when the number of side walls is four and the first angle formed between every two adjacent/connected side walls is 90 °, the guide film 2 is square or rectangular.
In addition, the shape of the first region 21 is, for example, circular, and the plurality of support bars 222 of the second region may be uniformly distributed in the circumferential direction of the first region 21, but the shape of the first region 21 is not limited thereto.
When laminating, laminating kicking block 1 is located the one side that guide film 2 deviates from the flexible body to contact with guide film 2, remove towards curved surface apron 5, after the flexible body contacted with curved surface apron 5, laminate flexible body and curved surface apron 5, in order to realize the laminating of flexible body and curved surface apron 5.
Wherein, laminating kicking block 1 is used for connecting through cambered surface 12 between the top surface 11 that contacts with guide film 2 and laminating kicking block 1's side 13.
Specifically, the plane where the top surface 11 of the bonding top block 1 is located and the plane where the side surface 13 of the bonding top block 1 is located form a third included angle, for example, the third included angle is about 90 degrees, that is, the top surface 11 of the bonding top block 1 is basically perpendicular to the first main body area 51 of the curved surface cover plate 5, the cambered surface 12 connecting the top surface 11 and the side surface 13 of the bonding top block 1 is corresponding to the edge bending area 52 of the curved surface cover plate 5, the cambered surface 12 is specifically a convex cambered surface 12, and the top surface 11 of the bonding top block 1 is closer to the curved surface cover plate 5 than the cambered surface 12.
Like this, the top surface 11 of laminating kicking block 1 is equivalent to protruding structure, in the laminating in-process, laminating kicking block 1 is first through its top surface 11 and curved surface apron 5 (first main part district 51) contact, rethread cambered surface 12 and curved surface apron 5's edge bending zone 52 contact, can avoid laminating kicking block 1 earlier with curved surface apron 5's edge bending zone 52 contact, when still further contacting curved surface apron 5's first main part district 51, produce excessive extrusion to the flexible body between edge bending zone 52 and the laminating kicking block 1, cause the flexible body to be corresponding to the broken of the wire (signal trace) of bending zone of curved surface apron 5's edge bending zone 52, and phenomenon such as the peeling off of rete (PI peeling) of polyimide layer.
In addition, laminating kicking block 1 can be elastic material, like this, in the laminating in-process, under the effect of laminating pressure, laminating kicking block 1 can be based on its elastic deformation matches the screen body appearance, makes flexible body and curved surface apron 5 laminating after can not appear marginal bubble scheduling problem.
Specifically, the elastic material may include silica gel.
In some preferred embodiments, the attaching top 1 may be made of silica gel.
In addition, as shown in fig. 4, before the bonding, a gap a for storing the first bending region of the flexible body may be reserved between the bonding top block 1 and the edge bending region 52 of the curved cover plate 5.
Therefore, the first bending area of the flexible body is avoided by the attaching top block 1, the transitional extrusion to the bending area can be avoided, the bending area is crushed, the phenomena of signal wiring/twisted wire arranged in the bending area in a pressing mode, film stripping (such as PI Peeling) of the bending area and the like are avoided, and the performance of the manufactured curved display screen is further optimized.
In the implementation, parameters such as the width of the attaching top block 1, the central angle of the arc corresponding to the cambered surface 12 connecting the top surface 11 and the side surface 13 of the attaching top block can be adjusted according to parameters such as the depth of the groove of the curved surface cover plate 5 and the radian of the attaching surface of the edge bending region 52, for example, when the depth of the groove of the curved surface cover plate 5 is large (e.g. greater than 1.0 mm), the central angle of the arc corresponding to the cambered surface 12 of the attaching top block 1 can be reduced accordingly, so as to reserve a gap A for setting the bending region of the flexible body.
In addition, since the curved cover plate 5 has a curved surface structure, the attaching surface thereof is formed with a groove, the flexible body is attached in the groove, the easy-to-tear attachment for tearing off the protective film 105 cannot tear off the protective film 105 from the edge, and in some embodiments, as shown in fig. 7, a portion of the protective film 105 corresponding to the first body region 51 is provided with a breaking edge 1051 for peeling off the protective film 105 from the first supporting film 91, the breaking edge 1051 may specifically be a cut for cutting off the protective film 105, an easy-to-tear attachment 106 may be provided at the breaking edge 1051, and in the subsequent process requiring tearing off the protective film 105, the protective film 105 is torn off (i.e., the protective film 105 is peeled off from the first supporting film 91) by the easy-to-tear attachment 106.
The shape of the breaking edge 1051 may include a linear type and/or a curved type, which generally extends from an edge of the protective film 105 toward a middle of the protective film 105, but is not limited thereto.
Illustratively, as shown in fig. 7, the breaking edge 1051 includes a first extension portion near the edge of the protective film 105, and a second extension portion connected to a side of the first extension portion away from the edge of the protective film 105, where the first extension portion is linear, the second extension portion is arc-shaped, and the easy-to-tear tab 106 may be specifically attached at the position of the first extension portion.
The attaching method provided by the embodiment of the invention comprises the following steps:
s1: providing a curved cover plate 5, a flexible body and the attaching device;
s2: placing the flexible body on one side of the guiding film 2 of the laminating device, which faces the curved cover plate 5; wherein at least part of the second region of the guiding film 2 is brought into contact with the flexible body;
s3: the guiding film 2 is made to bear the flexible body and move towards the curved cover plate 5 so as to attach the flexible body to the curved cover plate 5.
In step S3, the bonding top block 1 pushes the guiding film 2 carrying the flexible body to move towards the curved cover plate 5, so as to press the flexible body onto the curved cover plate 5, thereby realizing bonding.
Wherein, the whole area of the first area 21 contacts with the flexible body, and at least part of the second area of the guiding film 2 contacts with the flexible body, and because the second area is provided with the opening 221, the contact area between the second area of the guiding film 2 and the flexible body can be reduced, so as to reduce the adhesion force between the guiding film 2 and the protecting film 105 of the flexible body, and avoid the phenomena of bringing up the film layer structure of the flexible body (especially the protecting film 105) and peeling between the film layers of the flexible body (such as peeling of the protecting film 105 and the supporting film) caused by the interference of the guiding film 2 and the edge bending area 52 of the curved cover plate 5.
In addition, the above-mentioned laminating process still includes S4: after the flexible body 10 is bonded to the curved cover 5, the guide film 2 is peeled off (i.e., the guide film 2 is peeled off from the flexible display module).
The curved surface display screen manufactured by the bonding device and the bonding method can be applied to display devices such as OLED displays and any products or components with display functions such as televisions, digital cameras, mobile phones and tablet personal computers comprising the display devices.
Finally, it should be noted that: the above embodiments are only for illustrating the technical solution of the present invention, and not for limiting the same; although the invention has been described in detail with reference to the foregoing embodiments, it will be understood by those of ordinary skill in the art that: the technical scheme described in the foregoing embodiments can be modified or some or all of the technical features thereof can be replaced by equivalents; such modifications and substitutions do not depart from the spirit of the invention.
Claims (10)
1. A laminating device for laminate flexible body and curved surface apron, its characterized in that includes: the flexible body comprises a flexible body, a guide film and a protective layer, wherein the flexible body is arranged on the flexible body, the guide film is used for bearing the flexible body and comprises a first area, a second area surrounding the first area and a third area surrounding the second area, and the second area is provided with at least one opening penetrating through the guide film along the thickness direction of the guide film;
the second region having a plurality of support bars, each two adjacent support bars being spaced apart by one of the openings;
the curved cover plate comprises an edge bending region, and at least part of the second region of the guide film corresponds to the edge bending region in position.
2. The bonding apparatus according to claim 1, wherein,
the number of the supporting bars is four;
and/or the supporting bars are uniformly distributed in the second area.
3. A conformable device according to claim 1 or claim 2, wherein the third region has a plurality of side walls connected in sequence, one of the side walls being connected to one of the support bars, or one of the support bars being connected at the intersection of each two adjacent side walls.
4. The fitting device of claim 1, wherein the shape of the opening comprises a semi-annular or polygonal shape.
5. The bonding device according to claim 1, further comprising a bonding top block for pushing a guide film carrying the flexible body to move toward the curved cover plate and pressing the flexible body to the curved cover plate; the laminating kicking block is used for with the top surface that the guide film contacted with pass through the cambered surface and be connected between the side of laminating kicking block.
6. The bonding apparatus according to claim 5, wherein the bonding top block is made of an elastic material.
7. The fitting device of claim 6, wherein the resilient material comprises silicone.
8. The fitting device of claim 5, wherein the flexible body comprises a profiled region that forms a first bending region corresponding to an edge bending region of the curved cover plate after fitting the flexible body to the curved cover plate;
before the lamination, a gap for storing the first bending area is reserved between the lamination top block and the edge bending area of the curved surface cover plate.
9. The bonding apparatus according to claim 1 or 8, wherein,
the flexible body comprises a screen body, a first support film arranged on one side of the screen body facing the guide film, and a protective film arranged on one side of the first support film facing the guide film;
the curved surface cover plate comprises a first main body area and an edge bending area which is arranged on the outer side of the first main body area in a surrounding mode, and a part of the protective film corresponding to the first main body area is provided with a breaking edge used for stripping the protective film from the first supporting film.
10. A bonding method comprising:
providing a curved cover plate, a flexible body and the laminating device of any one of claims 1-9;
placing the flexible body on one side of the guide film of the laminating device, which faces the curved cover plate; wherein at least a partial region of the second region of the guide film is brought into contact with the flexible body;
and enabling the guide film to bear the flexible body to move towards the curved cover plate so as to attach the flexible body to the curved cover plate.
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| CN114999325A (en) | 2022-09-02 |
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