CN111063260B - Display device and bending method thereof - Google Patents

Display device and bending method thereof Download PDF

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Publication number
CN111063260B
CN111063260B CN201911380140.5A CN201911380140A CN111063260B CN 111063260 B CN111063260 B CN 111063260B CN 201911380140 A CN201911380140 A CN 201911380140A CN 111063260 B CN111063260 B CN 111063260B
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self
repairing
layer
bending
display device
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CN111063260A (en
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危军浩
袁世鹏
周瑞渊
萧官诚
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Wuhan Tianma Microelectronics Co Ltd
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Wuhan Tianma Microelectronics Co Ltd
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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
    • G—PHYSICS
    • G02—OPTICS
    • G02F—OPTICAL DEVICES OR ARRANGEMENTS FOR THE CONTROL OF LIGHT BY MODIFICATION OF THE OPTICAL PROPERTIES OF THE MEDIA OF THE ELEMENTS INVOLVED THEREIN; NON-LINEAR OPTICS; FREQUENCY-CHANGING OF LIGHT; OPTICAL LOGIC ELEMENTS; OPTICAL ANALOGUE/DIGITAL CONVERTERS
    • G02F1/00—Devices or arrangements for the control of the intensity, colour, phase, polarisation or direction of light arriving from an independent light source, e.g. switching, gating or modulating; Non-linear optics
    • G02F1/01—Devices or arrangements for the control of the intensity, colour, phase, polarisation or direction of light arriving from an independent light source, e.g. switching, gating or modulating; Non-linear optics for the control of the intensity, phase, polarisation or colour 
    • G02F1/13—Devices or arrangements for the control of the intensity, colour, phase, polarisation or direction of light arriving from an independent light source, e.g. switching, gating or modulating; Non-linear optics for the control of the intensity, phase, polarisation or colour  based on liquid crystals, e.g. single liquid crystal display cells
    • G02F1/1306—Details
    • G02F1/1309—Repairing; Testing
    • 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
    • G09F9/33—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 being semiconductor devices, e.g. diodes

Abstract

The invention discloses a display device and a bending method thereof, wherein the method comprises the following steps: forming a display device and a driving circuit for driving the display device in the display area and the circuit area of the flexible base material layer respectively; uniformly coating a self-repairing material on a bending area of the flexible substrate layer, and pretreating the self-repairing material to obtain a pretreated self-repairing layer; the self-repairing layer after pretreatment is in a jelly state, and a plurality of notches are formed in the surface of one side close to the bending shaft; bending the bending region along the bending axis towards the back of the display device to enable the driving circuit to be positioned on the back of the display device; and finally processing the pretreated self-repairing layer to enable the plurality of cuts to be healed into a whole to obtain a solid self-repairing layer, so that after the bending area is bent, the surfaces of the cuts are subjected to chemical reaction during final processing to enable the surfaces of the cuts to be healed, the purpose of self-repairing is achieved, and the internal stress of the finally obtained solid self-repairing layer is reduced.

Description

Display device and bending method thereof
Technical Field
The present invention relates to the field of display technologies, and in particular, to a display device and a bending method thereof.
Background
With the continuous development of display technology, the tolerance of the non-display area on the side where the display screen is located in the market is lower and lower.
In the related art, in order to maximize the display area of the display device, the circuit area attached to the front surface of the display screen is usually bent to the back surface of the display screen, however, when the bending area between the display screen and the circuit area is bent, the PI (polyimide) layer is often broken due to stress concentration in the PI layer in the bending area.
In view of this, how to effectively reduce the stress of the PI layer in the bending region becomes a technical problem to be solved urgently.
Disclosure of Invention
The embodiment of the invention provides a display device and a bending method thereof, which are used for solving the technical problem that the stress of a PI layer in a bending area is larger in the prior art.
In a first aspect, to solve the above technical problem, an embodiment of the present invention provides a method for bending a display device, where the method includes:
forming a display device in a display area of a flexible base material layer, and forming a driving circuit for driving the display device in a circuit area of the flexible base material layer;
uniformly coating a self-repairing material on the bending area of the flexible substrate layer, and pretreating the self-repairing material to obtain a pretreated self-repairing layer; the bending area is positioned between the display area and the circuit area, the self-repairing layer after pretreatment is in a jelly state, and a plurality of notches are formed in the surface of one side close to the bending shaft;
bending the bending region towards the back of the display device along a bending axis to enable the driving circuit to be located on the back of the display device;
and finally treating the pretreated self-repairing layer to enable the plurality of incisions to be healed into a whole, so as to obtain a solid self-repairing layer.
Optionally, the cut does not penetrate through the pretreated self-repairing layer, and the cutting direction is parallel to the extending direction of the bending shaft.
Optionally, the self-repairing material is a self-repairing UV glue or a self-repairing solution.
Optionally, uniformly coating a self-repairing material on the bending region of the flexible substrate layer, and pretreating the self-repairing material to obtain a pretreated self-repairing layer, including:
arranging a miniature zigzag die in the bending area;
uniformly coating the UV glue capable of self-repairing on the bending area and the surface of the miniature serrated die;
carrying out UV irradiation on the self-repairable UV glue to obtain a jelly-state self-repairing material;
and removing the miniature serrated die from the jelly-state self-repairing material to obtain the self-repairing layer after pretreatment.
Optionally, uniformly coating a self-repairing material on the bending region of the flexible substrate layer, and pretreating the self-repairing material to obtain a pretreated self-repairing layer, including:
uniformly coating the self-repairing solution on the bending area;
heating the self-repairing solution to obtain a jelly-state self-repairing material;
and cutting one surface of the self-repairing material in the jelly state close to the bending shaft to obtain the self-repairing layer after pretreatment.
Optionally, the self-repairing layer after the pretreatment is finally treated to enable the plurality of incisions to be integrally healed, so as to obtain a solid self-repairing layer, wherein the self-repairing layer comprises:
and carrying out UV irradiation on the pretreated self-repairing layer to obtain the solid self-repairing layer.
Optionally, the self-repairing layer after the pretreatment is finally treated to enable the plurality of incisions to be integrally healed, so as to obtain a solid self-repairing layer, wherein the self-repairing layer comprises:
and heating the pretreated self-repairing layer to obtain the solid self-repairing layer.
Optionally, the plurality of slits are aligned in a first direction, the first direction being a direction perpendicular to the bending axis;
the plurality of notches are uniformly arranged along the first direction;
or the notches in the middle are arranged closely and the notches on both sides are arranged sparsely.
Optionally, the self-repairing layer is positioned on one surface of the flexible substrate layer close to the display area;
and/or the self-repairing layer is positioned in the opening of the back plate; the back plate is located on one surface, deviating from the display area, of the flexible base material layer, and the opening of the back plate corresponds to the bending area.
Optionally, the self-repairable UV glue is any one of polyurethane acrylates containing disulfide groups (DSPUAs), polyurethane acrylates (PUAs), polytetrahydrofuran polyurethane acrylates (PTUA), epoxy resin EP-DA, and self-repairable hybrid materials mainly containing epoxy acrylates.
Alternatively, the self-repairing solution is a mixed solution of poly 3, 4-ethylenedioxythiophene (PEDOT), polystyrene sulfonic acid (PSS), polyethylene glycol octyl phenyl ether (Triton-100), dimethyl sulfoxide (DMSO), or a series of self-repairing materials prepared from methoxyethyl acrylate and N- (methoxymethyl) methacrylamide.
In a second aspect, based on the same inventive concept, embodiments of the present invention provide a display device manufactured by the bending method according to the first aspect.
The invention has the following beneficial effects:
in the embodiment provided by the invention, the display device is formed in the display area of the flexible base material layer, and the driving circuit for driving the display device is formed in the circuit area of the flexible base material layer; uniformly coating a self-repairing material on a bending area of the flexible substrate layer, and pretreating the self-repairing material to obtain a pretreated self-repairing layer; the self-repairing layer after pretreatment is in a jelly state, and a plurality of notches are formed in the surface of one side close to the bending shaft; bending the bending region along the bending axis towards the back of the display device to enable the driving circuit to be positioned on the back of the display device; and finally treating the pretreated self-repairing layer to enable the plurality of incisions to be healed into a whole, so as to obtain a solid self-repairing layer. The surface of the flexible substrate layer corresponding to the bending area C is provided with the pretreated self-repairing layer, after the bending area is bent, the pretreated self-repairing layer can be extruded on one side close to the bending shaft, so that the cut surfaces on the side are contacted with each other, the cut surfaces which are mutually attached are subjected to chemical reaction during final treatment, the cut surfaces are healed, the self-repairing purpose is achieved, and the solid self-repairing layer is finally obtained, so that the internal stress of the solid self-repairing layer can be reduced, and the risk that the solid self-repairing layer is separated from the flexible substrate layer can be reduced.
Drawings
Fig. 1 is a schematic diagram illustrating a bending process of a display device according to an embodiment of the invention;
fig. 2 is a flowchart illustrating a bending method of a display device according to an embodiment of the invention;
FIG. 3 is a self-healing microscopic healing mechanism diagram of a self-healing UV adhesive provided by an embodiment of the invention;
fig. 4 is a schematic diagram illustrating a position of a self-repairing layer according to an embodiment of the present invention;
fig. 5 is a schematic structural diagram of obtaining a solid self-repairing layer according to an embodiment of the present invention.
Detailed Description
The embodiment of the invention provides a display device and a bending method thereof, which are used for solving the technical problem that the stress of a PI layer in a bending area is larger in the prior art.
In order to make the aforementioned objects, features and advantages of the present invention comprehensible, the present invention is further described with reference to the accompanying drawings and examples. Example embodiments may, however, be embodied in many different forms and should not be construed as limited to the embodiments set forth herein; rather, these embodiments are provided so that this disclosure will be thorough and complete, and will fully convey the concept of example embodiments to those skilled in the art. The same reference numerals in the drawings denote the same or similar structures, and thus their repetitive description will be omitted. The words expressing the position and direction described in the present invention are illustrated in the accompanying drawings, but may be changed as required and still be within the scope of the present invention. The drawings of the present invention are for illustrative purposes only and do not represent true scale.
It should be noted that in the following description, specific details are set forth in order to provide a thorough understanding of the present invention. The invention can be implemented in a number of ways different from those described herein and similar generalizations can be made by those skilled in the art without departing from the spirit of the invention. Therefore, the present invention is not limited to the specific embodiments disclosed below. The description which follows is a preferred embodiment of the present application, but is made for the purpose of illustrating the general principles of the application and not for the purpose of limiting the scope of the application. The protection scope of the present application shall be subject to the definitions of the appended claims.
The display device and the bending method thereof according to the embodiments of the present invention will be described in detail with reference to the accompanying drawings.
Referring to fig. 1 and fig. 2, fig. 1 is a schematic diagram illustrating a bending process of a display device according to an embodiment of the present invention, and fig. 2 is a flowchart illustrating a bending method of a display device according to an embodiment of the present invention, the bending method including:
step 201: a display device 2 is formed in the display region a of the flexible base material layer 1, and a drive circuit 3 for driving the display device 2 is formed in the circuit region B of the flexible base material layer 1.
The material used for the flexible substrate layer 1 may be Polyimide (PI). The display device 2 may include a Polarizer (POL), an Optically Clear Adhesive (OCA), a display unit, and the like.
Referring to fig. 1a, a flexible substrate layer 1 corresponds to a display area a, a circuit area B, and a bending area C, a display device 2 is formed in the display area a corresponding to one side surface of the flexible substrate layer 1, the display device 2 may be a liquid crystal display device or an OLED display device, a driving circuit 3 for driving the display device 2 is formed in the circuit area B corresponding to the same side of the flexible substrate layer 1, when the display device 2 is a liquid crystal display device, the driving circuit 3 is a circuit for driving the liquid crystal display device, and when the display device 2 is an OLED display device, the driving circuit 3 is a circuit for driving the OLED display device.
After the display device 2 and the driving circuit 3 are formed on one side surface of the flexible substrate layer 1, step 202 may be performed.
Step 202: uniformly coating a self-repairing material on the bending region C of the flexible substrate layer 1, and pretreating the self-repairing material to obtain a pretreated self-repairing layer 4 a; the bending area C is located between the display area A and the circuit area B, the preprocessed self-repairing layer is in a jelly state, and a plurality of notches 41 are formed in the surface of one side close to the bending axis X.
In the embodiment provided by the invention, the self-repairing material is a self-repairing UV glue or a self-repairing solution. The self-repairing material can be changed into a semi-solidification state (namely a jelly state) after pretreatment, and a cut is applied to the UV glue at the moment, the cut can be self-healed after retreatment, and the self-repairing material can be changed into a solid state.
For example, referring to fig. 3, a self-repairing microscopic healing mechanism diagram of a self-repairable UV gel provided by an embodiment of the present invention is shown, in which the self-repairable UV gel (as shown in 3a in fig. 3) is changed into a semi-solidified state (as shown in 3b in fig. 3) after a first UV irradiation, at this time, an incision is formed in the semi-solidified UV gel to break disulfide bonds inside the UV gel (as shown in 3c in fig. 3), after a second UV irradiation, a dynamic light exchange reaction of the disulfide bonds occurs on the surface of the UV gel to heal the broken disulfide bonds again (i.e., the incision of the UV gel is healed again), and the solidified UV gel is changed into a solid UV gel (as shown in 3d in fig. 3).
The self-repairing solution and the UV adhesive capable of self-repairing have similar self-repairing functions, and the difference is that the self-repairing solution is subjected to pretreatment and subsequent final treatment in a heating and drying mode, and the self-repairing of the notch 41 is realized through recombination of internal hydrogen bonds.
In the embodiment provided by the invention, the self-repairable UV adhesive is any one of disulfide group-containing urethane acrylate (DSPUAs), urethane acrylate (PUA), polytetrahydrofuran urethane acrylate (PTUA), epoxy resin EP-DA and self-repairable mixed material taking epoxy acrylate as a main body.
In the embodiment provided by the invention, the self-repairing solution is a mixed solution of poly-3, 4-ethylenedioxythiophene (PEDOT), polystyrene sulfonic acid (PSS), polyethylene glycol octyl phenyl ether (Triton-100) and dimethyl sulfoxide (DMSO), or a series of self-repairable materials prepared from methoxyethyl acrylate and N- (methoxymethyl) methacrylamide.
Referring to fig. 1 and fig. 4, fig. 4 is a schematic position diagram of a self-repairing layer according to an embodiment of the present invention.
The self-repairing layer 4a is positioned on one surface of the flexible substrate layer 1 close to the display area A; as shown in fig. 1b, the self-repairing material may be uniformly coated on the corresponding bending region C on one surface of the flexible substrate layer 1, where the surface is the side surface where the display device 2 is located, and the self-repairing material is pretreated to form the self-repairing layer 4 a.
And/or the self-repair layer 4a is located in an opening of the back plate 5; wherein, backplate 5 is located the one side that flexible substrate layer 1 deviates from display device 2, and the opening of backplate 5 corresponds with bending zone C. The self-repairing material can also be uniformly coated on the corresponding bending region on the other surface of the flexible substrate layer 1, and the other surface is the surface deviating from the display device 2, as shown in fig. 3. And self-repairing materials are uniformly coated on two surfaces of the flexible base material layer 1 corresponding to the bending region C, and the self-repairing materials are pretreated to form the self-repairing layer 4 a.
Backplate 5 is used for supporting device and the structure that display area A and circuit area B correspond, and backplate 5 specifically is lower protection film (BP), and the region that corresponds with the bending zone C of flexible substrate layer 1 is provided with the opening in backplate 5.
In the embodiment provided by the invention, the self-repairing materials used for the self-repairing layers 4a on the two sides of the flexible base material layer 1 corresponding to the bending region C may be the same self-repairing materials, or may be different self-repairing materials, and are not particularly limited.
It should be noted that, when the self-repair material is uniformly coated on the bending region C of the flexible substrate layer 1, the self-repair layer 4a located on the same side as the display device 2 actually covers the region between the display device 2 and the driving circuit 3, but in the embodiment provided by the present invention, after the self-repair material is pre-processed into a jelly state, a plurality of notches 41 are formed only on the face, close to the bending axis X, of the jelly-state self-repair material corresponding to the bending region C, and for convenience of description, the back panel 5 is not shown in fig. 1.
In the embodiment provided by the present invention, the plurality of slits 41 are arranged along a first direction, which is a direction perpendicular to the bending axis X.
The plurality of slits 41 are uniformly arranged in the first direction; or the notches in the middle are arranged closely and the notches on both sides are arranged sparsely.
In the embodiment provided by the invention, the plurality of notches 41 are uniformly arranged along the first direction, or the notches positioned in the middle of the bending area are tightly arranged, and the notches at two sides are sparsely arranged, so that the bending size of the bending area can be effectively restrained, and the overall shape after bending can be fixed.
It should be noted that in the embodiment provided by the present invention, since the bending axis X is not a solid, it is illustrated in a dotted line in fig. 1; in fig. 1, the extending direction of the bending axis X is perpendicular to the drawing plane, and therefore, the extending direction of the bending axis X is indicated by a black dot in fig. 1.
In the embodiment provided by the present invention, the incisions 41 do not penetrate the self-repairing layer 4a after the pretreatment, and the cutting direction is parallel to the extending direction of the folding axis X. By providing the cut 41 so as not to penetrate the self-repairing layer 4a after the pretreatment, the side of the self-repairing layer 4a after the pretreatment facing away from the bending axis X is a continuous smooth surface when the subsequent bending is performed.
Aiming at different materials of the self-repairing material, the self-repairing material is uniformly coated on the bending region C of the flexible substrate layer 1, and is pretreated to obtain a pretreated self-repairing layer 4a, and the method can be realized in the following mode:
in the first mode, when the self-repairing material is a self-repairable UV glue, the process of obtaining the self-repairing layer 4a after pretreatment is as follows:
first, a micro serrated mold is disposed in the bending region C, and the micro serrated mold may be obtained by 3D printing on the bending region C of the flexible substrate layer 1.
And secondly, uniformly coating the UV glue capable of self-repairing on the bending area C and the surface of the miniature serrated mold.
And finally, carrying out UV irradiation on the self-repairable UV glue to obtain the jelly-state self-repairing material.
And finally, removing the miniature serrated die from the jelly-state self-repairing material to obtain the self-repairing layer 4a after pretreatment.
In a second mode, when the self-repairing material is a self-repairing solution, the process of obtaining the self-repairing layer 4a after pretreatment is as follows:
first, a self-repairing solution is uniformly coated in a bending area C.
And heating the self-repairing solution to obtain the jelly-state self-repairing material.
And finally, cutting one surface of the self-repairing material in the jelly state close to the bending axis X to obtain a self-repairing layer 4a after pretreatment.
The pretreated self-repair layer 4a can be obtained by the above two methods, and after the pretreated self-repair layer 4a is obtained, step 203 can be executed.
Step 203: the bending region C is bent toward the back surface of the display device 2 along the bending axis X, so that the driving circuit 3 is located on the back surface of the display device 2.
Referring to fig. 1C, after the bending region C is bent toward the back surface of the display device 2 along the bending axis X, the cuts in the self-repair layer 4a after the pretreatment are pressed against each other, so that the cut surfaces are in contact with each other.
Step 204: the self-repairing layer 4a after the pretreatment is finally treated to heal a plurality of incisions into a whole, thereby obtaining a solid self-repairing layer 4 b.
Fig. 5 is a schematic structural diagram of a solid-state self-repair layer according to an embodiment of the present invention.
Aiming at different materials of the self-repairing material, the self-repairing layer 4a after pretreatment is finally treated, so that a plurality of incisions are healed into a whole to obtain a solid self-repairing layer 4b, and the method can be correspondingly realized through the following steps:
when the self-repairing material is UV glue capable of self-repairing, the self-repairing layer 4a after pretreatment is finally treated, so that a plurality of incisions are healed into a whole, and the mode adopted for obtaining the solid self-repairing layer 4b is as follows: and (3) carrying out UV irradiation on the pretreated self-repairing layer, so that the dynamic light exchange reaction of disulfide bonds occurs on the surface of the cut under the irradiation of a UV lamp, the cut is self-repaired, and the solid self-repairing layer 4b is obtained under the continuous UV irradiation.
When the self-repairing material is a self-repairing solution, the self-repairing layer 4a after pretreatment is finally treated, so that a plurality of incisions are healed into a whole, and the mode adopted for obtaining the solid self-repairing layer 4b is as follows: and heating the pretreated self-repairing layer to enable hydrogen bond recombination to occur on the surface of the cut, self-healing the cut, and continuously heating and drying to obtain the solid self-repairing layer 4 b.
In the embodiment provided by the invention, the self-repairing layer 4a is arranged on the surface of the flexible substrate layer 1 corresponding to the bending region C, after the bending region C is bent, one side of the self-repairing layer 4a close to the bending axis X is extruded, so that the cut surfaces on the side are contacted with each other, and during final treatment, the chemical reaction is generated on the cut surfaces which are mutually attached through UV irradiation or heating, so that the cut surfaces are healed, the self-repairing purpose is achieved, and the solid self-repairing layer 4b is finally obtained, so that the internal stress of the self-repairing layer 4b can be reduced, and the risk of separation of the self-repairing layer 4b and the flexible substrate layer 1 can be reduced.
In the embodiment provided by the invention, after the bending region C is bent, the self-repairing layer 4a under the surface of the flexible substrate layer 1 close to the bending axis is extruded, the self-repairing layer 4a is arranged on the surface, a plurality of notches on the surface of one side of the self-repairing layer 4a close to the bending axis X are contacted with each other after bending, and the final treatment process of UV irradiation or heating is carried out on the self-repairing layer 4a, so that the surfaces of the notches are healed, and the solid self-repairing layer 4b is obtained, thereby reducing the internal stress of the self-repairing layer 4 b.
In the embodiment provided by the invention, the self-repairing layer 4b is arranged on the surface of the flexible substrate layer 1 corresponding to the bending region C, for example, in the opening of the back plate 5, so that the overall thickness of the bending region C is increased, and the increased thickness can effectively transfer the stress neutral layer (the original position is equivalent to between the self-repairing layer and the 4b flexible substrate layer 1) into the flexible substrate layer 1, thereby improving the stress distribution of the flexible substrate layer 1 and playing a role of protecting the flexible substrate layer 1.
Based on the same inventive concept, embodiments of the present invention provide a display device, which may be manufactured using the bending method as described above.
The display device can be a display, a display screen, a television and other display devices, and can also be mobile equipment such as a mobile phone, a tablet computer, a notebook computer and the like.
While preferred embodiments of the present invention have been described, additional variations and modifications in those embodiments may occur to those skilled in the art once they learn of the basic inventive concepts. Therefore, it is intended that the appended claims be interpreted as including preferred embodiments and all such alterations and modifications as fall within the scope of the invention.
It will be apparent to those skilled in the art that various changes and modifications may be made in the present invention without departing from the spirit and scope of the invention. Thus, if such modifications and variations of the present invention fall within the scope of the claims of the present invention and their equivalents, the present invention is also intended to include such modifications and variations.

Claims (11)

1. A bending method of a display device, the bending method comprising:
forming a display device in a display area of a flexible base material layer, and forming a driving circuit for driving the display device in a circuit area of the flexible base material layer;
uniformly coating a self-repairing material on the bending area of the flexible substrate layer, and pretreating the self-repairing material to obtain a pretreated self-repairing layer; the bending area is positioned between the display area and the circuit area, the pretreated self-repairing layer is in a jelly state, a plurality of cuts are formed in the surface of one side close to the bending shaft, the cuts do not penetrate through the pretreated self-repairing layer, and the cutting direction is parallel to the extending direction of the bending shaft;
bending the bending region towards the back of the display device along a bending axis to enable the driving circuit to be located on the back of the display device;
and finally treating the pretreated self-repairing layer to enable the plurality of incisions to be healed into a whole, so as to obtain a solid self-repairing layer.
2. The bending method according to claim 1, wherein the self-repairing material is a self-repairing UV glue or a self-repairing solution.
3. The bending method according to claim 2, wherein the step of uniformly coating a self-repairing material on the bending area of the flexible substrate layer and pretreating the self-repairing material to obtain a pretreated self-repairing layer comprises the following steps:
arranging a miniature zigzag die in the bending area;
uniformly coating the UV glue capable of self-repairing on the bending area and the surface of the miniature serrated die;
carrying out UV irradiation on the self-repairable UV glue to obtain a jelly-state self-repairing material;
and removing the miniature serrated die from the jelly-state self-repairing material to obtain the self-repairing layer after pretreatment.
4. The bending method according to claim 2, wherein the step of uniformly coating a self-repairing material on the bending area of the flexible substrate layer and pretreating the self-repairing material to obtain a pretreated self-repairing layer comprises the following steps:
uniformly coating the self-repairing solution on the bending area;
heating the self-repairing solution to obtain a jelly-state self-repairing material;
and cutting one surface of the self-repairing material in the jelly state close to the bending shaft to obtain the self-repairing layer after pretreatment.
5. The method of creasing according to claim 3, wherein subjecting the pretreated self-repairing layer to a final treatment to integrally heal the plurality of incisions, to obtain a solid self-repairing layer, comprises:
and carrying out UV irradiation on the pretreated self-repairing layer to obtain the solid self-repairing layer.
6. The method of creasing according to claim 4, wherein subjecting the pretreated self-repairing layer to a final treatment to integrally heal the plurality of incisions, to obtain a solid self-repairing layer, comprises:
and heating the pretreated self-repairing layer to obtain the solid self-repairing layer.
7. The bending method according to any one of claims 1 to 6, wherein the plurality of cuts are arranged in a first direction, the first direction being a direction perpendicular to the bending axis;
the plurality of notches are uniformly arranged along the first direction;
or the notches in the middle are arranged closely and the notches on both sides are arranged sparsely.
8. The bending method according to claim 7, wherein the self-repairing layer is positioned on one side of the flexible substrate layer close to the display area;
and/or the self-repairing layer is positioned in the opening of the back plate; the back plate is located on one surface, deviating from the display area, of the flexible base material layer, and the opening of the back plate corresponds to the bending area.
9. The bending method according to claim 2, wherein the self-repairable UV glue is any one of disulfide group-containing urethane acrylates (DSPUAs), urethane acrylates (PUAs), polytetrahydrofuran urethane acrylates (PTUAs), epoxy resin EP-DA, and self-repairable hybrid materials mainly composed of epoxy acrylates.
10. The bending method according to claim 2, wherein the self-repairing solution is a mixed solution of poly-3, 4-ethylenedioxythiophene (PEDOT), polystyrene sulfonic acid (PSS), polyethylene glycol octylphenyl ether (Triton-100), dimethyl sulfoxide (DMSO), or a series of self-repairable materials prepared from methoxyethyl acrylate and N- (methoxymethyl) methacrylamide.
11. A display device, characterized in that it is produced by a bending method according to any one of claims 1-10.
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