CN114333616B - Display panel, pressing device and preparation method of display panel - Google Patents
Display panel, pressing device and preparation method of display panel Download PDFInfo
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- CN114333616B CN114333616B CN202111348059.6A CN202111348059A CN114333616B CN 114333616 B CN114333616 B CN 114333616B CN 202111348059 A CN202111348059 A CN 202111348059A CN 114333616 B CN114333616 B CN 114333616B
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- 238000003825 pressing Methods 0.000 title claims abstract description 61
- 238000002360 preparation method Methods 0.000 title abstract description 6
- 230000001681 protective effect Effects 0.000 claims abstract description 162
- 238000005452 bending Methods 0.000 claims abstract description 62
- 239000000853 adhesive Substances 0.000 claims abstract description 59
- 230000001070 adhesive effect Effects 0.000 claims abstract description 59
- 239000003292 glue Substances 0.000 claims description 82
- 239000002184 metal Substances 0.000 claims description 10
- 238000000034 method Methods 0.000 claims description 8
- 238000004519 manufacturing process Methods 0.000 claims description 4
- 230000007935 neutral effect Effects 0.000 claims description 4
- 241000826860 Trapezium Species 0.000 claims 1
- 239000011148 porous material Substances 0.000 abstract description 9
- 239000011248 coating agent Substances 0.000 description 16
- 238000000576 coating method Methods 0.000 description 16
- 238000010586 diagram Methods 0.000 description 12
- 239000000758 substrate Substances 0.000 description 7
- 230000035882 stress Effects 0.000 description 6
- 230000000694 effects Effects 0.000 description 5
- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Substances O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 description 5
- QVGXLLKOCUKJST-UHFFFAOYSA-N atomic oxygen Chemical compound [O] QVGXLLKOCUKJST-UHFFFAOYSA-N 0.000 description 3
- 230000009286 beneficial effect Effects 0.000 description 3
- 238000007599 discharging Methods 0.000 description 3
- 230000009545 invasion Effects 0.000 description 3
- 229910052760 oxygen Inorganic materials 0.000 description 3
- 239000001301 oxygen Substances 0.000 description 3
- 229920001187 thermosetting polymer Polymers 0.000 description 3
- 239000000084 colloidal system Substances 0.000 description 2
- 238000004891 communication Methods 0.000 description 2
- 238000003475 lamination Methods 0.000 description 2
- 239000000463 material Substances 0.000 description 2
- 238000003892 spreading Methods 0.000 description 2
- 239000004697 Polyetherimide Substances 0.000 description 1
- 239000004642 Polyimide Substances 0.000 description 1
- 239000004734 Polyphenylene sulfide Substances 0.000 description 1
- 230000002159 abnormal effect Effects 0.000 description 1
- 230000000903 blocking effect Effects 0.000 description 1
- 230000003139 buffering effect Effects 0.000 description 1
- 238000005336 cracking Methods 0.000 description 1
- 230000006355 external stress Effects 0.000 description 1
- 229920001230 polyarylate Polymers 0.000 description 1
- 229920001601 polyetherimide Polymers 0.000 description 1
- 229920001721 polyimide Polymers 0.000 description 1
- 229920000069 polyphenylene sulfide Polymers 0.000 description 1
- 229920001296 polysiloxane Polymers 0.000 description 1
- -1 polytetrafluoroethylene Polymers 0.000 description 1
- 229920001343 polytetrafluoroethylene Polymers 0.000 description 1
- 239000004810 polytetrafluoroethylene Substances 0.000 description 1
- HBMJWWWQQXIZIP-UHFFFAOYSA-N silicon carbide Chemical compound [Si+]#[C-] HBMJWWWQQXIZIP-UHFFFAOYSA-N 0.000 description 1
- 229910010271 silicon carbide Inorganic materials 0.000 description 1
- 239000000126 substance Substances 0.000 description 1
Classifications
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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
- Y02E—REDUCTION OF GREENHOUSE GAS [GHG] EMISSIONS, RELATED TO ENERGY GENERATION, TRANSMISSION OR DISTRIBUTION
- Y02E10/00—Energy generation through renewable energy sources
- Y02E10/50—Photovoltaic [PV] energy
- Y02E10/549—Organic PV cells
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- Devices For Indicating Variable Information By Combining Individual Elements (AREA)
- Liquid Crystal (AREA)
Abstract
The application provides a display panel, a pressing device and a preparation method of the display panel, wherein the display panel comprises the following components: the screen body comprises a display part, a bending part and an extending part which are sequentially connected, wherein the display part and the extending part are opposite and are arranged at intervals; the bending part comprises a first surface and a second surface which are arranged oppositely, and the second surface faces the interval between the display part and the extension part; the protective adhesive at least covers the first surface and/or the second surface, and one side surface of the protective adhesive, which is away from the bending part, is provided with a concave-convex structure; wherein, concave-convex structure is by pressing fit tool to the protection is glued the pressfitting and is formed. Through the design mode, the probability of existence of pores and bubbles in the protective adhesive can be reduced.
Description
Technical Field
The application belongs to the technical field of display, and particularly relates to a display panel, a pressing device and a preparation method of the display panel.
Background
In order to achieve a full screen effect, the non-display area of the screen body is generally subjected to bending treatment, so that the frame size of the display panel is as small as possible. However, after bending the non-display area of the panel, the bending area of the panel is very susceptible to stress and cracking.
In order to reduce the occurrence of cracks, protective glue is generally coated on the surface of a bending area of the screen body at present. In addition, the current protective glue is generally formed by adopting a point-shaped glue coating mode, and the point-shaped glue formed by the point-shaped glue coating can automatically diffuse to form a planar glue. However, there are problems that the spreading of the punctiform colloid is insufficient and uneven, and pores, bubbles and the like exist in the planar colloid formed by the spreading. And the existence of pores and bubbles provides a channel for the invasion of external substances such as water and oxygen into the bending area screen body, thereby causing great hidden trouble to the reliability of the screen body.
Disclosure of Invention
The application provides a display panel, a pressing device and a preparation method of the display panel, which are used for reducing the probability of existence of pores and bubbles in protective glue.
In order to solve the technical problems, the application adopts a technical scheme that: provided is a display panel including: the screen body comprises a display part, a bending part and an extending part which are sequentially connected, wherein the display part and the extending part are opposite and are arranged at intervals; the bending part comprises a first surface and a second surface which are arranged oppositely, and the second surface faces the interval between the display part and the extension part; the protective adhesive at least covers the first surface and/or the second surface, and one side surface of the protective adhesive, which is away from the bending part, is provided with a concave-convex structure; wherein, concave-convex structure is by pressing fit tool to the protection is glued the pressfitting and is formed.
In order to solve the technical problems, the application adopts another technical scheme that: provided is a bonding apparatus including: the pressing jig comprises a jig body, wherein one side surface of the jig body is a concave-convex surface, the concave-convex surface is used for pressing with the protective adhesive which is not cured completely and covers the bending part of the screen body, and the protective adhesive is away from the surface of one side of the bending part to form a concave-convex structure matched with the concave-convex surface; and the curing jig is used for completely curing the protective adhesive after the concave-convex structure is formed on the surface of the protective adhesive.
In order to solve the technical problems, the application adopts another technical scheme that: provided is a method of manufacturing a display panel, including: providing a screen body, wherein the screen body comprises a display part, a bendable part and an extension part which are sequentially connected, and the bendable part comprises a first surface and a second surface which are oppositely arranged; setting incompletely cured protective glue on at least the first surface and/or the second surface, pressing the protective glue on one side, which is away from the bendable part, of the protective glue by using a pressing jig with a concave-convex surface, and completely curing the protective glue by using a curing jig after removing the pressing jig; the bendable portion is bent such that the display portion and the extension portion are disposed opposite to and spaced apart from each other, and the second surface faces the space between the display portion and the extension portion.
Different from the prior art, the application has the following beneficial effects: the display panel provided by the application comprises a screen body and protective glue; and the protective glue covers the first surface and/or the second surface of the bending part of the screen body. The surface of one side of the protective glue, which is away from the bending part, is provided with a concave-convex structure, and the concave-convex structure is formed by pressing the protective glue by a pressing jig. The protective glue is subjected to pressing treatment in advance by using the pressing jig with the concave-convex surface when the protective glue is formed, at the moment, the holes in the protective glue are filled with the protective glue at other positions due to the pressing effect, and air bubbles in the protective glue are discharged due to the pressing effect, so that the probability that external water vapor and the like invade the inside of the screen body from the protective glue is reduced, and the stability of the display panel is improved; in addition, because the surface of the pressing jig is the concave-convex surface, the contact area of the pressing jig and the protective glue is larger, thereby being beneficial to rapidly filling up the holes in the protective glue, rapidly discharging bubbles in the protective glue and improving the product yield.
Drawings
For a clearer description of the technical solutions of the embodiments of the present application, the drawings that are needed in the description of the embodiments will be briefly introduced below, it being obvious that the drawings in the description below are only some embodiments of the present application, and that other drawings can be obtained according to these drawings without inventive effort for a person skilled in the art, wherein:
FIG. 1 is a schematic diagram of a display panel according to an embodiment of the application;
FIG. 2 is a schematic diagram of another embodiment of a display panel according to the present application;
FIG. 3 is a schematic structural diagram of an embodiment of the bending portion of FIG. 2;
FIG. 4 is a side view of an embodiment of FIG. 2 from the AA perspective;
FIG. 5 is a side view of another embodiment of FIG. 2 from the AA perspective;
FIG. 6 is a schematic structural diagram of an embodiment of a pressing device according to the present application;
FIG. 7 is a schematic flow chart of an embodiment of a method for manufacturing a display panel according to the present application;
fig. 8a is a schematic structural diagram of an embodiment corresponding to step S101 in fig. 7;
fig. 8b is a schematic structural diagram of an embodiment of disposing an incompletely cured protective paste in step S102 in fig. 7.
Detailed Description
The following description of the embodiments of the present application will be made clearly and fully with reference to the accompanying drawings, in which it is evident that the embodiments described are only some, but not all embodiments of the application. All other embodiments, which can be made by those skilled in the art based on the embodiments of the application without making any inventive effort, are intended to be within the scope of the application.
Referring to fig. 1 and 2, fig. 1 is a schematic structural diagram of an embodiment of a display panel according to the present application, and fig. 2 is a schematic structural diagram of another embodiment of a display panel according to the present application, wherein the display panel 1 may be an OLED display panel or the like, and specifically includes a screen body 10 and a protective adhesive 12.
The screen body 10 includes a display portion 100, a bending portion 102 and an extending portion 104, which are sequentially connected, wherein the display portion 100 and the extending portion 104 are opposite and are arranged at intervals; wherein the bending portion 102 includes a first surface 1020 and a second surface 1022 disposed opposite to each other, and the second surface 1022 faces the space between the display portion 100 and the extension portion 104; the first surface 1020 may be considered to be the outer surface of the bend 102 and the second surface 1022 may be the inner surface of the bend 102. Alternatively, in the present embodiment, the starting point of the bending portion 102 may be a position where the bending curvature changes from zero to non-zero, and the ending point of the bending portion 102 may be a position where the bending curvature changes from non-zero to zero. The display portion 100 may include a substrate, an array layer, a light emitting layer, a package layer, and the like stacked in this order; the substrate is a flexible substrate, and the material of the substrate can be polyimide, polyetherimide, polyphenylene sulfide, polyarylate and the like. The bending part 102 and the extending part 104 may include a substrate, a routing layer, an insulating layer, etc. which are stacked, and the substrate in the bending part 102 and the extending part 104 and the substrate in the display part 100 are integrally formed, and the routing layer in the bending part 102 and the extending part 104 may be electrically connected with the array layer.
Further, the protective gel 12 covers at least the first surface 1020 (as shown in fig. 1); alternatively, the protective gel 12 covers at least the second surface 1022; alternatively, the protective gel 12 covers at least the first surface 1020 and the second surface 1022 (as shown in fig. 2). The surface of the side of the protective adhesive 12 facing away from the bending part 102 is provided with a concave-convex structure (not labeled); wherein, the concave-convex structure is formed by pressing the protective adhesive 12 by the pressing jig. Alternatively, in the present embodiment, the protective paste 12 may be an ultraviolet curable paste, a thermosetting paste, a normal temperature curable paste, or the like.
In the above embodiment, when forming the protective glue 12, the protective glue 12 is subjected to the pressing treatment in advance by using the pressing jig with the concave-convex surface, at this time, the pores inside the protective glue 12 are filled with the protective glue 12 at the rest positions due to the pressing effect, and the air bubbles inside the protective glue 12 are discharged due to the pressing effect, so that the probability that the external water vapor and the like invade the inside of the screen body 10 from the protective glue 12 is reduced, and the stability of the display panel 1 is improved; in addition, as the surface of the pressing jig is the concave-convex surface, the contact area between the pressing jig and the protective glue 12 is larger, thereby being beneficial to rapidly filling up the pores in the protective glue 12, rapidly discharging bubbles in the protective glue 12 and improving the product yield.
In one embodiment, as shown in fig. 3, fig. 3 is a schematic structural diagram of the embodiment of the bending portion before bending in fig. 2. Before the bending portion 102 is bent, the protective adhesive 12 covers at least the first surface 1020 and the second surface 1022; wherein the concave-convex structure comprises convex parts A and concave parts B which are alternately arranged; the orthographic projection of the protrusion a of the protective paste 12 covering the second surface 1022 onto the first surface 1020 is located inside the orthographic projection of the protrusion a of the protective paste 12 covering the first surface 1020 onto the first surface 1020; optionally, the front projection of the protrusion a of the protective paste 12 covering the second surface 1022 onto the first surface 1020 and the front projection of the protrusion a of the protective paste 12 covering the first surface 1020 onto the first surface 1020 coincide with each other. Similarly, the orthographic projection of the recess B of the protective paste 12 covering the second surface 1022 onto the first surface 1020 is located inside the orthographic projection of the recess B of the protective paste 12 covering the first surface 1020 onto the first surface 1020; optionally, the orthographic projection of the recess B of the protective paste 12 covering the second surface 1022 onto the first surface 1020 and the orthographic projection of the recess B of the protective paste 12 covering the first surface 1020 onto the first surface 1020 coincide with each other. When the bending portion 102 is bent, as shown in fig. 2, the protruding portions a in the protective paste 12 covering the first surface 1020 may correspond one-to-one with the protruding portions a in the protective paste 12 covering the second surface 1022, and the recessed portions B in the protective paste 12 covering the first surface 1020 correspond one-to-one with the recessed portions B in the protective paste 12 covering the second surface 1022. Alternatively, the central axes of the convex portions a located on the first surface 1020 and the convex portions a located on the second surface 1022 are on the same straight line, and the central axes of the concave portions B located on the first surface 1020 and the concave portions B located on the second surface 1022 are on the same straight line. When the metal wire is disposed in the bending portion 102, the design manner can make the stress on both sides of the metal wire be the same and offset as much as possible, so as to reduce the probability of breakage of the metal wire. Preferably, the neutral plane of the display panel 1 at the position of the bending part 102 is located in the layer where the metal trace is located. The display panel 1 at the position of the bending portion 102 is an integral body formed by the bending portion 102 and the protective adhesive 12 around the bending portion 102, and the neutral plane of the integral body passes through the layer where the metal wiring is located. The design method can minimize the total stress of the metal wires in the bending part 102, so as to minimize the probability of breakage of the metal wires.
Alternatively, as shown in fig. 2, the minimum thickness d1 of the protective paste 12 corresponding to the concave portion B is greater than or equal to 1/3 of the maximum thickness d2 of the protective paste 12 corresponding to the convex portion a; for example, the minimum thickness d1 of the protective paste 12 corresponding to the concave portion B is 1/2, 2/3, or the like of the maximum thickness d2 of the protective paste 12 corresponding to the convex portion a. The design mode can reduce the amount of the protective adhesive 12 on the basis of meeting the basic protective performance of the protective adhesive 12, and can enable the air bubbles in the protective adhesive 12 to be discharged thoroughly.
Alternatively, as shown in fig. 2, the average thickness of the protective gel 12 covering the first surface 1020 is greater than the average thickness of the protective gel 12 covering the second surface 1022. On the other hand, since the average thickness of the protective adhesive 12 covering the second surface 1022 is smaller, the bending resistance is smaller and the bending is easier when the extending portion 104 is bent to be opposite to and spaced apart from the display portion 100. On the other hand, the first surface 1020 of the bending portion 102 is equivalent to an outer surface, and the probability of generating cracks due to the impact of external stress is relatively high, so that the arrangement of the protective adhesive 12 with relatively thick average thickness on the first surface 1020 can play a role of stress buffering, so as to reduce the probability of generating cracks on the first surface 1020 of the bending portion 102. In yet another aspect, the design described above in which the average thickness of the protective gel 12 covering the first surface 1020 is greater than the average thickness of the protective gel 12 covering the second surface 1022 is also considered to be such that the metal traces are in the neutral plane.
Preferably, the protective gel 12 covering the first surface 1020 has an average thickness of 40 microns to 200 microns (e.g., 60 microns, 100 microns, 150 microns, etc.), and the protective gel 12 covering the second surface 1022 has an average thickness of 20 microns to 100 microns (e.g., 40 microns, 80 microns, etc.). The introduction of the protective adhesive 12 in the above thickness range does not increase the frame width of the display panel 1 too much, which is advantageous for a narrow frame.
Referring to fig. 2 and 4 together, fig. 4 is a side view of one embodiment of fig. 2 from the AA perspective. For clarity of illustration, different filling formats are employed for the convex portion a and concave portion B in fig. 4. As can be seen from fig. 4, in a first direction X in which the display portion 100 points to the extension portion 104, a plurality of protruding portions a are arranged on a surface of a side of the protective adhesive 12 facing away from the bending portion 102 at intervals, and each protruding portion a is arranged in a strip shape; correspondingly, at this time, a strip-shaped concave part B is formed between two adjacent strip-shaped convex parts A. Alternatively, as shown in fig. 4, the extending directions of each of the convex portions a arranged in a stripe shape may be parallel to each other, and the extending directions of each of the convex portions a arranged in a stripe shape are arranged to intersect the first direction X. The design mode can increase the contact area between the protective glue 12 and the pressing jig, so that bubbles and pores in the protective glue 12 are removed as much as possible, and the probability of water and oxygen invasion is reduced. In addition, since the plurality of strip-shaped protrusions a are arranged at intervals along the first direction X, when cracks are generated on the protrusions a or the recesses B under the action of external force, the design can lengthen propagation paths of the stress and the cracks, so as to reduce the probability of the stress and the cracks being transferred to the display part 100, and improve the stability of the device.
Alternatively, in other embodiments, the design of the concave-convex structure on the protective adhesive 12 may be other. For example, as shown in fig. 5, fig. 5 is a side view of another embodiment of fig. 2 from the AA perspective. For clarity of illustration, different filling formats are employed for the convex portion a and concave portion B in fig. 5. As can be seen from fig. 5, in a first direction X in which the display portion 100 points to the extension portion 104, a plurality of rows of concave-convex structures 120 are arranged on a surface of a side of the protective adhesive 12 facing away from the bending portion 102, and the extending direction of each row of concave-convex structures 120 intersects the first direction X, and each row of concave-convex structures 120 includes a convex portion a and a concave portion B that are alternately arranged. The design mode can further increase the contact area between the protective glue 12 and the pressing jig, so that bubbles and pores in the protective glue 12 are removed as much as possible, and the probability of water and oxygen invasion is reduced. Alternatively, as shown in fig. 5, the extending directions of each row of the concave-convex structures 120 may be parallel to each other, and the structural form of each row of the concave-convex structures 120 may be the same; further, the extending direction of each row of the concave-convex structures 120 may be perpendicular to the first direction X. The design mode can reduce the process difficulty of forming the concave-convex surface on the surface of the pressing jig, and reduce the alignment difficulty when the pressing jig is contacted with the protective glue 12.
In another embodiment, as shown in fig. 2 and 5, in the direction from the screen body 10 to the protective paste 12, the vertical section of the convex portion a and/or the concave portion B includes at least one of a trapezoid, a triangle, a rectangle, and an arc. When the vertical section of the convex portion a and the concave portion B includes at least one of a trapezoid, a triangle, or a rectangle, and when the concave-convex structure 120 includes the convex portion a and the concave portion B alternately arranged, the concave-convex structure 120 is in a tooth shape in the extending direction of the concave-convex structure 120. When the vertical sections of the convex portion a and the concave portion B include an arc shape, and when the concave-convex structure 120 includes the convex portion a and the concave portion B alternately arranged, the concave-convex structure 120 takes a wave shape in the extending direction of the concave-convex structure 120. The convex part A and the concave part B are simpler in structural design and easy to prepare and form.
In addition, referring to fig. 1 again, the protective adhesive 12 may cover the portion of the display portion 100 and the extension portion 104 adjacent to the bending portion 102 in addition to the bending portion 102, and the concave-convex structure may be disposed only corresponding to the bending portion 102.
Referring to fig. 1 and fig. 6 together, fig. 6 is a schematic structural diagram of an embodiment of a pressing device 2 according to the present application, and the pressing device 2 includes a pressing fixture 20 and a curing fixture 22. The pressing jig 20 includes a jig body 200, and a side surface of the jig body 200 is a concave-convex surface, and the concave-convex surface is used for pressing with the protective glue 12 that covers the bending portion 102 of the screen body 10 and is not completely cured, so as to discharge air bubbles inside the protective glue 12 and fill up pores inside the protective glue 12, so that a concave-convex structure (not labeled in fig. 1) matched with the concave-convex surface is formed on the side surface of the protective glue 12 facing away from the bending portion 102. The curing jig 22 is used for completely curing the protective adhesive 12 after the concave-convex structure is formed on the surface of the protective adhesive 12. In the present embodiment, the curing jig 22 can be used after the bonding jig 20 is removed. And when the protective adhesive 12 is an ultraviolet curing adhesive, the curing jig 22 may be an ultraviolet curing jig; when the protective adhesive 12 is a thermosetting adhesive or a normal temperature curing adhesive, the curing jig 22 may be a thermosetting jig; that is, the type of the specific curing jig 22 is determined by the type of the protective adhesive 12. The whole pressing device 2 has a simpler structure and lower cost.
Optionally, in the present embodiment, after the pressing jig 20 presses the protective adhesive 12, the protective adhesive 12 is not completely cured, but can also maintain the shape after the pressing jig 20 is removed. Preferably, when the pressing jig 20 presses the protective adhesive 12, the protective adhesive 12 has a curing rate of 50% -60%. The setting of the curing rate can ensure that the shape of the protective adhesive 12 is kept better after the protective adhesive 12 is pressed by the pressing jig 20; on the other hand, when the pressing jig 20 presses the protective glue 12, the protective glue 12 has certain fluidity, air bubbles in the protective glue 12 can be discharged, and the holes in the protective glue 12 can be filled.
In one embodiment, referring to fig. 6, the press-fit jig 20 further includes a release coating 202, and the release coating 202 may cover the concave-convex surface of the jig body 200. The anti-sticking coating 202 can reduce the probability of sticking the protective adhesive 12 when the pressing jig 20 is removed after pressing, so as to reduce the probability of abnormal thickness of the protective adhesive 12. Alternatively, the release coating 202 may be made of polytetrafluoroethylene, silicone, or the like.
Further, the thickness of the release coating 202 is 5 microns to 10 microns; for example, 6 microns, 8 microns, etc. In general, if the thickness of the release coating 202 is thin, the probability of breakage of the release coating 202 increases as the service time increases; if the thickness of the release coating 202 is too thick, the adhesion load between the release coating 202 and the jig body 200 increases, and the release coating 202 and the jig body 200 are easily separated. The anti-sticking coating 202 in the above thickness range is designed in consideration of the above, and the probability of detachment from the jig body 200 is reduced while the lifetime is ensured.
In addition, the release coating 202 has a plurality of first holes (not shown), the jig body 200 has a plurality of second holes (not shown), and at least a portion of the first holes are in communication with the second holes. Optionally, in this embodiment, all the first holes are in communication with the second holes. The dimensions of the first holes and the second holes may be micro-scale or nano-scale. The design manner of the first hole and the second hole that are communicated can enable the air bubbles in the protective glue 12 to be discharged through the first hole and the second hole during lamination, so that the air bubble discharging efficiency is improved. Optionally, in this embodiment, the material of the jig body 200 may be silicon carbide, etc., and the plurality of second holes in the jig body 200 may form a plurality of channels, and each channel may be communicated with the outside; at least part of the first holes are communicated with the channel to further discharge the bubbles. In addition, due to the release coating 202, the surface tension of the release coating 202 may prevent the protective adhesive 12 from entering the second hole during the lamination process, so as to reduce the probability of blocking the second hole.
The present application will be further described in terms of the preparation method. Referring to fig. 7, fig. 7 is a flow chart of an embodiment of a method for manufacturing a display panel according to the present application, the method includes:
s101: the screen body 10 is provided, the screen body 10 includes a display portion 100, a bendable portion 106 and an extension portion 104 connected in sequence, and the bendable portion 106 includes a first surface 1060 and a second surface (not shown) disposed opposite to each other.
Specifically, referring to fig. 8a, fig. 8a is a schematic structural diagram of an embodiment corresponding to step S101 in fig. 7. In the present embodiment, the panel 10 in the step S101 is the panel 10 before bending, and the bendable portion 106 in the panel 10 forms the bending portion 102 mentioned in the embodiment after bending.
S102: at least the first surface 1060 and/or the second surface 1062 is provided with an incompletely cured protective glue 12, and the protective glue 12 is pressed by a pressing jig 20 with a concave-convex surface on the side of the protective glue 12 facing away from the bendable portion 106, and the protective glue 12 is completely cured by a curing jig 22 after the pressing jig 20 is removed.
Specifically, referring to fig. 8b, fig. 8b is a schematic structural diagram of an embodiment of disposing an incompletely cured protective adhesive in step S102 in fig. 7. In this embodiment, the adhesive dispensing device may be used to provide the incompletely cured protective adhesive 12 on the first surface 1060 and the second surface 1062 of the bendable portion 106, respectively. Of course, in other embodiments, the adhesive dispensing device may be used to provide the incompletely cured protective adhesive 12 on the first surface 1060 of the bendable portion 106, or to provide the incompletely cured protective adhesive 12 on the second surface 1062 of the bendable portion 106.
When the protective adhesive 12 having the concave-convex structure needs to be formed on the first surface 1060 and the second surface 1062 of the bendable portion 106 (as shown in the structure of fig. 3), the adhesive dispensing device may be utilized to form the protective adhesive 12 that is not completely cured on one of the surfaces, then the pressing jig 20 is utilized to press the protective adhesive 12 on the side facing away from the bendable portion 106, and after the pressing jig 20 is removed, the curing jig 22 is utilized to completely cure the protective adhesive 12; then, an incompletely cured protective adhesive 12 is formed on the other surface by using the dispensing device, then, a pressing tool 20 is used for pressing the protective adhesive 12 at the side away from the bendable part 106, and after the pressing tool 20 is removed, the curing tool 22 is used for completely curing the protective adhesive 12. Of course, in other embodiments, when the shape of the protective glue 12 that is not completely cured is well maintained, the protective glue 12 may be formed on the first surface 1060 and the second surface 1062 by using the dispensing device, and then the protective glue 12 on the first surface 1060 and the second surface 1062 may be pressed by using the pressing jig 20; finally, the curing jig 22 is used to uniformly cure the protective adhesive 12 on the first surface 1060 and the second surface 1062.
In addition, the thickness of the protective paste 12 applied during dispensing may be slightly greater than the thickness of the protective paste 12 as set. The thickness of the final protective adhesive 12 meets the requirement by setting the stroke of the pressing jig 20. At this time, the excessive protective glue 12 may overflow from the edge of the pressing jig 20 to two sides of the screen body 10 (as shown by the dashed line frame in fig. 8 a), and may be cut and removed together when the edge of the screen body 10 is cut.
S103: the bendable portion 106 is bent such that the display portion 100 and the extension portion 104 are opposite and spaced apart, and the second surface faces the space between the display portion 100 and the extension portion 104.
Specifically, the structure formed in the final step S103 is as shown in fig. 1 or fig. 2, and the bendable portion 106 forms the bending portion 102 in fig. 1 and fig. 2.
The foregoing description is only illustrative of the present application and is not intended to limit the scope of the application, and all equivalent structures or equivalent processes or direct or indirect application in other related technical fields are included in the scope of the present application.
Claims (7)
1. A display panel, comprising:
the screen body comprises a display part, a bending part and an extending part which are sequentially connected, wherein the display part and the extending part are opposite and are arranged at intervals; the bending part comprises a first surface and a second surface which are arranged oppositely, and the second surface faces the interval between the display part and the extension part;
the protective adhesive at least covers the first surface and the second surface, and one side surface of the protective adhesive, which is away from the bending part, is provided with a concave-convex structure; wherein the concave-convex structure is formed by pressing the protective glue by a pressing jig;
wherein the concave-convex structure comprises convex parts and concave parts which are alternately arranged; and the convex part in the protective glue covering the first surface corresponds to the convex part in the protective glue covering the second surface, the concave part in the protective glue covering the first surface corresponds to the concave part in the protective glue covering the second surface, and the minimum thickness of the protective glue corresponding to the concave part is greater than or equal to 1/3 of the maximum thickness of the protective glue corresponding to the convex part.
2. The display panel of claim 1, wherein the display panel comprises,
the metal wiring is arranged in the bending part, and the neutral surface of the display panel at the position of the bending part is positioned in the layer where the metal wiring is positioned.
3. The display panel according to any one of claims 1-2, wherein,
in a first direction that the display part points to the extension part, a plurality of strip-shaped convex parts are arranged on one side surface of the protective glue, which is away from the bending part, at intervals, and strip-shaped concave parts are formed between two adjacent convex parts; or in the first direction of the display part pointing to the extension part, a plurality of rows of concave-convex structures which are arranged at intervals are arranged on the surface of one side of the protective glue, which is away from the bending part, and the extension direction of each row of concave-convex structures is intersected with the first direction.
4. The display panel of claim 1, wherein the display panel comprises,
the average thickness of the protective glue covering the first surface is greater than the average thickness of the protective glue covering the second surface.
5. The display panel of claim 4, wherein the display panel comprises,
the average thickness of the protective glue covering the first surface is 40-200 microns, and the average thickness of the protective glue covering the second surface is 20-100 microns.
6. The display panel of claim 1, wherein the display panel comprises,
in the direction from the screen body to the protective glue, the vertical section of the convex part and/or the concave part comprises at least one of trapezium, triangle, rectangle and arc.
7. A method for manufacturing a display panel, comprising:
providing a screen body, wherein the screen body comprises a display part, a bendable part and an extension part which are sequentially connected, and the bendable part comprises a first surface and a second surface which are oppositely arranged;
setting incompletely cured protective glue on at least the first surface and the second surface, pressing the protective glue on one side, away from the bendable part, of the protective glue by using a pressing jig with a concave-convex surface, and completely curing the protective glue by using a curing jig after removing the pressing jig;
bending the bendable portion such that the display portion and the extension portion are disposed opposite to and spaced apart from each other, and the second surface faces the space between the display portion and the extension portion;
the display device comprises a display part, an extending part, a protective glue and a bending part, wherein the bending part comprises a first surface and a second surface which are oppositely arranged, the second surface faces the interval between the display part and the extending part, the protective glue at least covers the first surface and the second surface, one side surface of the protective glue, which is away from the bending part, is provided with a concave-convex structure, and the concave-convex structure comprises convex parts and concave parts which are alternately arranged; and the convex part in the protective glue covering the first surface corresponds to the convex part in the protective glue covering the second surface, the concave part in the protective glue covering the first surface corresponds to the concave part in the protective glue covering the second surface, wherein the minimum thickness of the protective glue corresponding to the concave part is greater than or equal to 1/3 of the maximum thickness of the protective glue corresponding to the convex part.
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| CN114333616A (en) | 2022-04-12 |
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