CN113506513A

CN113506513A - Display panel and preparation method thereof

Info

Publication number: CN113506513A
Application number: CN202110674317.3A
Authority: CN
Inventors: 郑财; 丁立薇; 马一鸿
Original assignee: Yungu Guan Technology Co Ltd
Current assignee: Yungu Guan Technology Co Ltd
Priority date: 2021-06-17
Filing date: 2021-06-17
Publication date: 2021-10-15
Anticipated expiration: 2041-06-17
Also published as: CN113506513B

Abstract

The application provides a display panel and a preparation method thereof, wherein the display panel comprises: the flexible screen body comprises a first part, a bending part and a second part which are sequentially connected with each other; wherein the first portion and the second portion are stacked and oppositely spaced; the first supporting layer and the second supporting layer are arranged between the first part and the second part in a laminated mode, the first supporting layer is attached to the first part, and the second supporting layer is attached to the second part; the support body is directly contacted with the inner surfaces of the bent parts, which are close to the first supporting layer and the second supporting layer, and is used for fixing the bent shape of the bent parts; and the supporting body is formed by mutually and fixedly connecting a plurality of supporting blocks. Through the mode, the effect of the limit bending radius of the bending part can be improved.

Description

Display panel and preparation method thereof

Technical Field

The application belongs to the technical field of display, and particularly relates to a display panel and a preparation method thereof.

Background

The OLED display panel is made of organic light emitting diodes, and has the excellent characteristics of high contrast, thin thickness, wide viewing angle, fast response speed, applicability to flexible panels, wide temperature range, simple structure and process, etc., and thus is considered as a new application technology for the next generation of flat panel displays. The existing OLED display panel has the problem of large frame width.

Disclosure of Invention

The application provides a display panel and a preparation method thereof, which are used for improving the effect of the ultimate bending radius of a bending part and reducing the width of a frame of the display panel.

In order to solve the technical problem, the application adopts a technical scheme that: provided is a display panel including: the flexible screen body comprises a first part, a bending part and a second part which are sequentially connected with each other; wherein the first portion and the second portion are stacked and oppositely spaced; the first supporting layer and the second supporting layer are arranged between the first part and the second part in a laminated mode, the first supporting layer is attached to the first part, and the second supporting layer is attached to the second part; the support body is directly contacted with the inner surfaces of the bent parts, which are close to the first supporting layer and the second supporting layer, and is used for fixing the bent shape of the bent parts; and the supporting body is formed by mutually and fixedly connecting a plurality of supporting blocks.

In order to solve the above technical problem, another technical solution adopted by the present application is: provided is a method for manufacturing a display panel, including: providing a display panel to be bent, wherein the display panel to be bent comprises a flexible screen body and a support film, the flexible screen body and the support film are arranged in a stacked mode, the flexible screen body comprises a first portion, a bendable portion and a second portion which are sequentially connected with one another, the support film comprises a first opening which is communicated in the stacking direction, and the orthographic projection of the first opening on the flexible screen body covers the bendable portion; forming a plurality of supporting blocks at the first opening positions, wherein one ends of the supporting blocks, which are far away from the bending parts, are arranged at intervals, and the thickness of the supporting blocks is greater than that of the supporting film; and bending the display panel to be bent to ensure that the side surfaces of two adjacent supporting blocks are mutually attached and fixedly connected to form a supporting body.

Being different from the prior art situation, the beneficial effect of this application is: the application provides a display panel includes the supporter, and the supporter is close to the internal surface direct contact of first supporting layer and second supporting layer with the kink for the bending form of the kink of the fixed flexible screen body, and this supporter is formed by the mutual fixed connection of a plurality of supporting shoes. The shape of the bent part after bending can be random by setting the shape of the supporting block, and the limit bending radius effect of the bent part can be improved. In addition, the mode of forming the supporting body through the mutual fixed connection of the supporting blocks can enable the supporting body to have a good fixing effect on the shape of the bending part, so that a padding block does not need to be introduced, and the purpose of reducing the thickness of the display panel is achieved.

Drawings

In order to more clearly illustrate the technical solutions in the embodiments of the present application, the drawings needed to be used in the description of the embodiments are briefly introduced below, it is obvious that the drawings in the following description are only some embodiments of the present application, and other drawings can be obtained by those skilled in the art without inventive efforts, wherein:

FIG. 1 is a schematic diagram of a display panel according to an embodiment of the prior art;

FIG. 2 is a schematic structural diagram of an embodiment of a display panel according to the present application;

FIG. 3 is a schematic structural diagram of a display panel according to another embodiment of the present application;

FIG. 4 is a schematic top view of a portion of one embodiment of a flexible screen;

FIG. 5 is a schematic top view of one embodiment of a plurality of pin sets on a driver circuit carrier;

FIG. 6 is a schematic flow chart illustrating a method for manufacturing a display panel according to an embodiment of the present disclosure;

FIG. 7a is a schematic structural diagram of an embodiment corresponding to step S101 in FIG. 6;

FIG. 7b is a schematic structural diagram of an embodiment corresponding to step S102 in FIG. 6;

FIG. 8 is a flowchart illustrating an embodiment corresponding to step S102 in FIG. 6;

FIG. 9a is a schematic structural diagram of an embodiment corresponding to step S201 in FIG. 8;

FIG. 9b is a schematic structural diagram of an embodiment corresponding to step S202 in FIG. 8;

FIG. 9c is a schematic structural diagram of an embodiment corresponding to step S203 in FIG. 8;

FIG. 9d is a schematic structural diagram of another embodiment corresponding to step S203 in FIG. 8;

FIG. 10 is a schematic structural diagram of one embodiment corresponding to the step S102-the step S103 in FIG. 6;

fig. 11 is a schematic flowchart of an embodiment of a method for manufacturing a display panel provided in the present application before step S103 in fig. 6.

Detailed Description

The technical solutions in the embodiments of the present application will be clearly and completely described below with reference to the drawings in the embodiments of the present application, and it is obvious that the described embodiments are only a part of the embodiments of the present application, and not all of the embodiments. All other embodiments, which can be derived by a person skilled in the art from the embodiments given herein without making any creative effort, shall fall within the protection scope of the present application.

As shown in fig. 1, fig. 1 is a schematic structural diagram of an embodiment of a display panel in the prior art. In order to realize a narrow bezel, the second portion 100 of the flexible screen 10 is bent to the non-display side. In order to fix the shape of the bent portion 102 of the flexible screen 10, an elevation block 12 is generally introduced to fix the bent portion 102 and control the bending radius. The above-mentioned method has a general effect of increasing the ultimate bending radius of the bending portion, and is not beneficial to reducing the thickness of the display panel.

To solve the above technical problem, please refer to fig. 2, wherein fig. 2 is a schematic structural diagram of an embodiment of a display panel according to the present application. The display panel provided by the present application includes a flexible screen body 20, a first support layer 222, a second support layer 224, and a support body (not labeled).

The flexible screen body 20 includes a first portion 200, a bending portion 206, and a second portion 204, which are connected to each other in sequence; the first portion 200 and the second portion 204 are stacked and disposed at an interval, and the bending portion 206 may be formed by bending a bendable portion. Optionally, in this embodiment, a display area and a non-display area are disposed on the first portion 200, and the non-display area on the first portion 200 is located between the display area on the first portion 200 and the bending portion 206; and the bending portion 206 and the second portion 204 may be both non-display areas.

The first support layer 222 and the second support layer 224 are stacked between the first portion 200 and the second portion 204, and the first support layer 222 is attached to a portion of the first portion 200 and the second support layer 224 is attached to a portion of the second portion 204. Alternatively, in this embodiment, the first portion 200 may include a plurality of film layers arranged in a stack; for example, the first portion 200 includes a flexible substrate, an array layer, a light emitting layer, an encapsulation layer, and the like, which are stacked. The first supporting layer 222 may be fixedly disposed on the non-display surface side of the first portion 200, that is, the first supporting layer 222 is fixedly disposed on a side of the flexible substrate of the first portion 200 away from the array layer.

The support body is in direct contact with the inner surfaces of the bent portion 206 near the first support layer 222 and the second support layer 224 for fixing the bent configuration of the bent portion 206, and the support body is formed by fixedly connecting a plurality of support blocks 26 to each other. In the above design, the shape of the bent portion 206 after bending can be made arbitrary by setting the shape of the supporting block 26, and the effect of the extreme bending radius of the bent portion 206 can be improved. In addition, the support body is formed by mutually and fixedly connecting the plurality of support blocks 26, so that the support body can have a good fixing effect on the shape of the bending part 206, and thus, a padding block does not need to be introduced, and the purpose of reducing the thickness of the display panel is achieved.

In one embodiment, with reference to fig. 2, the display panel provided by the present application further includes a protective adhesive 24 covering an outer surface of the bending portion 206 facing away from the first supporting layer 222 and the second supporting layer 224. The introduction of the protective glue 24 can protect the bending portion 206 to a certain extent, and reduce the probability of damage to the bending portion 206 under the action of external force. Wherein, in a horizontal direction perpendicular to the first lamination direction X1 of the first to second sections 200 to 204, a first predetermined interval D1 greater than 0 is provided between an orthogonal projection of the protective paste 24 on the first section 200 and an orthogonal projection of the first support layer 222 on the first section 200. Compared with the prior art in fig. 1, the first supporting layer 222 is retracted to the right relative to the bending portion 206 and the protective adhesive 24, and this design may provide enough space for the subsequent formation of the supporting block. Likewise, a second predetermined distance D2 greater than 0 is provided between the orthographic projection of the protective glue 24 on the second portion 204 and the orthographic projection of the second support layer 224 on the second portion 204. The design mode can achieve the effects. Optionally, the first predetermined distance D1 is equal to the second predetermined distance D2. Generally, the protective glue 24 is formed on the flexible screen body 20 by coating, and the above design method can make the coating mechanism control the spreading degree of the protective glue 24 on the two opposite sides with the same control condition, so as to reduce the difficulty of the preparation process.

Further, with reference to fig. 2, the support body is in contact with and fixedly connected to the first support layer 222 and the second support layer 224 near the bending portion 206. The design mode can increase the contact area between the support body and the rest film layers in the display panel so as to reduce the probability of the support body being separated from the display panel.

Optionally, before the bending portion 206 is bent, a tooth-shaped structure is formed on a side of the plurality of supporting blocks 26 away from the bending portion 206; the tooth structure can facilitate the bending process of the bending portion 206. After the bending portion 206 is bent, the supporting blocks 26 contact each other and the tooth structure is closed at a point; this design can make the structure of the supporter that finally forms comparatively inseparable, and its fixed effect of buckling is better.

In one application scenario, the support block 26 is a curable organic material, the support block 26 has a first cure rate, the support body has a second cure rate, and the second cure rate is greater than the first cure rate, and the support body is formed by contacting and curing a plurality of support blocks 26. That is, in the present embodiment, the adjacent supporting blocks 26 are connected together by cross-linking and curing through chemical reaction, which can make the bonding force between the adjacent supporting blocks 26 higher and the probability of separation between the adjacent supporting blocks 26 lower. It should be noted that, after the supporting blocks 26 are mutually contacted and solidified to form the supporting body, the supporting body can be regarded as an integral structure, and the boundary between the adjacent supporting blocks 26 can even disappear.

In another embodiment, with continued reference to fig. 2, the outer surface of the protective adhesive 24 facing away from the first supporting layer 222 and the second supporting layer 224 is tangent to a first tangent line M1, and the first tangent line M1 is parallel to the first lamination direction X1 from the first portion 200 to the second portion 204; the first horizontal distance D3 is between the first supporting layer 222 and the first tangent M1, the second horizontal distance D4 is between the second supporting layer 224 and the first tangent M1, and the first horizontal distance D3 is smaller than the second horizontal distance D4. When the light emitting unit is disposed only on the first portion 200, the design may further be disposed in the space between the first supporting layer 222 and the second supporting layer 224 while the supporting block does not affect the normal light emission, so as to improve the bending and fixing effect of the supporting block on the bending portion 206. The above design not only can reduce the thickness of the whole support body in the first lamination direction X1, so as to reduce the thickness of the display panel; moreover, the width of the frame occupied by the whole support body in the direction perpendicular to the first stacking direction X1 can be reduced, so that the purpose of narrow frame is achieved.

Further, in the first lamination direction X1 of the first portion 200 to the second portion 204, the bent portion 206 includes a first end 2060 connected to the first portion 200 and a second end 2062 connected to the second portion 204; wherein a maximum distance H1 between a side surface of first end 2060 remote from first portion 200 and a side surface of second end 2062 remote from second portion 204 is greater than a sum of the thickness of first portion 200, the thickness of second portion 204, and the distance H2 between first portion 200 and second portion 204. Compared with the prior art in fig. 1, the design mode has the advantages that the thickness of the whole display panel is reduced, and the light and thin structure is realized.

Further, as shown in fig. 3, fig. 3 is a schematic structural diagram of another embodiment of the display panel of the present application. A buffer layer 21 is further disposed between the first support layer 222 and the second support layer 224 in the first lamination direction X1, and the thickness of the buffer layer 21 is less than the difference between the maximum thickness H1 and the sum H2. Optionally, in this embodiment, the buffer layer 21 is attached to a side of the first support layer 222 away from the first portion 200. The introduction of the buffer layer 21 can protect the first portion 200 to a certain extent, and the thickness setting can reduce the thickness of the whole display panel.

In addition, referring to fig. 4, fig. 4 is a partial schematic top view of an embodiment of a flexible screen. Second portion 204 is provided with bonding area 2040, bonding area 2040 is provided with bonding pad group 20400, and bonding pad group 20400 includes a plurality of bonding pads a arranged in the same row. As shown in fig. 5, fig. 5 is a schematic top view of an embodiment of a driving circuit carrier. The display panel may further include a driving circuit carrier 50, the driving circuit carrier 50 includes at least two rows of pin groups 500, each row of pin group 500 includes a plurality of pins 5000 disposed in the same row, and a spacing distance between adjacent pins 5000 in any row of pin groups 500 is different from a spacing distance between adjacent pins 5000 in other pin groups 500. Alternatively, in the present embodiment, the driving circuit carrier 50 may be a flexible circuit board FPC, a chip on film COF, or the like. The spacing distance between adjacent pins 5000 within the same pin group 500 may be the same; the plurality of pins 5000 in the same pin group 500 may be arranged along a first direction P1, at least two rows of the pin groups 500 may be arranged along a second direction P2, and the first direction P1 is perpendicular to the second direction P2. In addition, the pin groups 500 in different rows may be insulated from each other, and the pin groups 500 in different rows may have a spacing distance greater than or equal to 0.1 mm. In addition, for convenience of alignment, all the lead groups 500 have the same symmetry axis L extending along the second direction P2.

The pad group 20400 on the second portion 204 is connected to one of the rows of pins 500; the process of selecting which pin set 500 to connect with for the specific pad set 20400 can be referred to in the subsequent preparation method section, and is not described in detail here.

Optionally, three rows of pin groups 500, namely a first pin group 500a, a second pin group 500b and a third pin group 500c, are disposed on the driving circuit carrier 50, and a spacing distance d2 between adjacent pins 5000 in the second pin group 500b is greater than a spacing distance d3 between adjacent pins 5000 in the third pin group 500c and is less than a spacing distance d1 between adjacent pins 5000 in the first pin group 500 a. The pad group 20400 may be connected to the first pin group 500a, the second pin group 500b, or the third pin group 500 c. It should be noted that, before bonding, the spacing distance D between adjacent pads a in the pad group 20400 may be the same as or different from the spacing distance between adjacent pins 5000 in the selected pin group 500; after the bond connection, the distance D between adjacent pads a in pad set 20400 is substantially the same as the distance D between adjacent pins 5000 in selected pin set 500 due to the expansion and contraction.

In addition, in the present embodiment, the selected pin 5000 and the pad a may be bond-connected by an anisotropic conductive adhesive film ACF. It should be noted that, although the extending directions of the pad a and the pin 5000 illustrated in fig. 4 and 5 are parallel to the symmetry axis L in fig. 5; in other embodiments, the extending directions of the pads a and the leads 5000 may be inclined to each other with respect to the symmetry axis L. That is, the specific shape and structure of the pad a and the pin 5000 are not limited in this application.

The following first describes the display panel provided in the present application from the perspective of the manufacturing method. Referring to fig. 6, fig. 6 is a schematic flow chart of an embodiment of a method for manufacturing a display panel according to the present application, the method specifically includes:

s101: providing a display panel to be bent (not labeled in fig. 7 a), where the display panel to be bent includes a flexible screen body 20 and a support film 22, which are stacked, where the flexible screen body 20 includes a first portion 200, a bendable portion 202, and a second portion 204, which are sequentially connected to each other, the support film 22 includes a first opening 220 penetrating in a first stacking direction X, and an orthographic projection of the first opening 220 on the flexible screen body 20 covers the bendable portion 202.

Specifically, referring to fig. 7a, fig. 7a is a schematic structural diagram of an embodiment corresponding to step S101 in fig. 6. In the present embodiment, the second stacking direction X2 is a stacking direction of the flexible panel 20 to the support film 22 before bending. The first opening 220 may divide the support film 22 into a first support layer 222 and a second support layer 224 which are arranged at intervals, and the first support layer 222 may be attached to a partial region of the first portion 220, and the second support layer 224 may be attached to a partial region of the second portion 204.

Further, an orthographic projection of the first opening 220 on the support film 22 on the flexible screen body 20 may cover the bendable part 202; optionally, an orthographic projection of a boundary of the first opening 220 on the flexible screen body 20 is located at the periphery of the bendable portion 202, and a distance greater than 0 is provided between the boundary and the bendable portion 202. The design mode can reserve space for the subsequent formation of the supporting block.

In addition, with reference to fig. 7a, before or after the step S101, the method may further include: a protective adhesive 24 is disposed on a side of the bendable part 202 away from the support film 22, and an orthographic projection of the protective adhesive 24 on the flexible screen body 20 covers the bendable part 202. The protective glue 24 can protect the bendable part 202 after bending to a certain extent, and the probability of damage of the bendable part under the action of external force is reduced. Further, the orthographic projection of the support film 22 on the flexible screen body 20 is positioned at the periphery of the orthographic projection of the protective glue 24 on the flexible screen body 20. This design may provide sufficient space for the supporting block to be formed later, so that the effect of fixing the bendable portion 202 by bending later is better. Optionally, an orthographic projection of the boundary of the protective glue 24 on the flexible screen body 20 is located between the boundary of the bendable portion 202 and the boundary of the first opening 220; that is, the area of the orthographic projection of the protective glue 24 on the flexible screen body 20 is larger than the area of the bendable part 202, and the area of the orthographic projection of the first opening 220 on the flexible screen body 20 is larger than the area of the orthographic projection of the protective glue 24 on the flexible screen body 20.

S102: a plurality of supporting blocks 26 are formed at the positions of the first openings 220, one ends of the supporting blocks 26 far away from the bending part 202 are arranged at intervals, and the thickness d1 of the supporting blocks 26 is larger than the thickness d2 of the supporting film 22.

Specifically, please refer to fig. 7b, wherein fig. 7b is a schematic structural diagram of an embodiment corresponding to step S102 in fig. 6. In the first stacking direction X, the side surfaces of the supporting blocks 26 may be flat surfaces or uneven surfaces, etc., the vertical cross sections of the supporting blocks 26 may be triangular, etc., and the shapes of the supporting blocks 26 may be set specifically according to actual conditions; and the shape of all the support blocks 26 may or may not be identical.

Optionally, in this embodiment, please refer to fig. 8, fig. 8 is a flowchart illustrating an embodiment corresponding to step S102 in fig. 6, and a specific implementation process of step S102 may be:

s201: the shielding layer 28 is formed on the side of the support film 22 away from the flexible screen body 20, the shielding layer 28 is provided with a second opening 280 penetrating in the first lamination direction X, and an orthographic projection of the second opening 280 on the support film 22 is overlapped with the first opening 220.

Specifically, referring to fig. 9a, fig. 9a is a schematic structural diagram of an embodiment corresponding to step S201 in fig. 8. The blocking layer 28 may be of some material that is subsequently easily separable from the support film 22. For example, the material of the shielding layer 28 is a material such as a common photoresist; and then can be removed by means of exposure, development and the like. Alternatively, the shielding layer 28 is a carrier sheet or the like having an adhesive on one surface, which can be subsequently removed by changing the adhesive.

S202: the support adhesive layer 30 is formed within the first opening 220 and the second opening 280.

Specifically, referring to fig. 9b, fig. 9b is a schematic structural diagram of an embodiment corresponding to step S202 in fig. 8. In this embodiment, the thickness of the support adhesive layer 30 may be greater than the depth of the first opening 220 and less than the sum of the depth of the first opening 220 and the depth of the second opening 280. The support adhesive layer 30 may be formed by coating or the like. In addition, if the shielding layer 28 in the overall structure of fig. 9a is located below, before performing step S202, the method further includes: the overall structure in figure 9a is inverted so that the shielding layer 28 is above.

S203: a plurality of grooves 300 are formed in the side of the support matrix 30 facing away from the flexible screen body 20, and the support matrix 30 between adjacent grooves 300 forms at least part of the support block 26.

Specifically, referring to fig. 9c, fig. 9c is a schematic structural diagram of an embodiment corresponding to step S203 in fig. 8. In this embodiment, the pressing mechanism 40 having the concave 400 and the convex 402 on the surface can be used to perform pressing from the side of the support adhesive layer 30 away from the flexible screen body 20. At least part of the supporting block 26 is formed at the position of the supporting glue layer 30 corresponding to the recess 400, and the groove 300 is formed at the position of the supporting glue layer 30 corresponding to the protrusion 402.

When the protrusion 402 of the pressing mechanism 40 contacts the flexible screen body 20 during the pressing process, the positions of the support glue layers 30 corresponding to the recesses 400 form the complete support blocks 26, i.e., the support glue layers 30 between adjacent grooves 300 form the complete support blocks 26. And in this embodiment, the side of the supporting blocks 26 facing away from the flexible screen body 20 may form a tooth-like structure.

In order to reduce the damage of the pressing mechanism 40 to the flexible screen 20 during the pressing process, at the lowest point of the pressing process, a preset safety distance may be provided between the protrusion 402 on the pressing mechanism 40 and the flexible screen 20, at this time, please refer to fig. 9d, where fig. 9d is a schematic structural diagram of another embodiment corresponding to step S203 in fig. 8. In the present embodiment, after being pressed by the pressing mechanism (not shown in fig. 9 d), the supporting blocks 26a formed by the supporting glue layers 30a are connected to each other at a side close to the flexible screen body 20a, i.e. the supporting glue layers 30a between adjacent grooves 300a form part of the supporting blocks 26 a. The plurality of support blocks 26a form a toothed structure on a side facing away from the flexible screen body 20 a.

Further, the step of removing the shielding layer 28 may be located after the above step S203. Generally speaking, the support adhesive layer 30 has a certain fluidity, as shown in fig. 9c, during the pressing process of the pressing mechanism 40, the shielding layer 28 can limit the support adhesive layer 30 to a certain extent, so as to reduce the probability that the support adhesive layer 30 overflows to the surface of the support film 22.

In addition, in order to fix the shape of the supporting block 26 formed after the pressing mechanism 40 presses, optionally, in this embodiment, the supporting glue layer 30 may be formed by an organic material that can be cured under the action of a curing mechanism; for example, a thermal initiator or a uv initiator, and an organic material capable of undergoing cross-linking curing may be included in the support adhesive layer 30. Generally, the curing rate of the support adhesive layer 30 formed in the step S202 is less than the first curing rate, for example, the first curing rate may be 50%, 60%, 70%, or the like. The specific implementation process of step S203 may be: the pressing mechanism 40 having the concave 400 and the convex 402 on the surface is used to perform pressing from the side of the support adhesive layer 30 away from the flexible screen body 20, and the curing mechanism (not shown) is used to cure the support adhesive layer 30 to have the first curing rate.

Of course, in other embodiments, the supporting block 26 may be preformed and disposed at the position of the first opening 220 by fitting, which is not limited in this application.

S103: the display panel to be bent is bent, so that the side surfaces of two adjacent supporting blocks 26 are mutually attached and fixedly connected to form a supporting body (not shown).

Specifically, referring to fig. 2 again, the plurality of supporting blocks 26 may fill a bending space formed by bending at least a portion of the bendable portion 202.

In addition, in the present embodiment, when the plurality of supporting blocks 26 are formed at the positions of the first openings 220 in the above step S102, the plurality of supporting blocks 26 have a first curing rate, which is less than 100%. Further, the specific implementation process of step S103 may be: attaching the side surfaces of two adjacent supporting blocks 26 to each other, and curing the supporting blocks 26 to have a second curing rate by using a curing mechanism; wherein the second cure rate is greater than the first cure rate. Alternatively, the second cure rate may be 100%, 98%, or the like. That is, in the present application, the shape of the supporting block 26 may be fixed before bending in a pre-curing manner, and then the side surfaces of the adjacent supporting blocks 26 after bending may be fixedly connected to each other in a secondary curing manner. The design mode is simple in implementation process.

Of course, in other embodiments, the supporting block 26 provided in step S102 may also be completely cured, and in this case, before step S103, the following steps may also be included: an adhesive layer is formed on the side of the supporting block 26. Further, the sides of adjacent support blocks 26 may be fixedly attached to each other by an adhesive layer.

In addition, referring to fig. 9c and fig. 2, when the plurality of grooves 300 in fig. 9c form a tooth-like structure, the step S103 specifically includes: the side surfaces of two adjacent support blocks 26 are brought into abutment with each other and the tooth-like structure is closed at one point. For example, all of the support blocks 26 may be caused to converge to a point away from the apex of the flexible screen body 20. The design can make the structure of the support body formed by the supporting blocks 26 more stable, and the fixing effect of the support body on the bending shape of the bending part 202 after bending is better.

In the above manufacturing method, the shape of the bendable portion 202 after bending can be made to be any by setting the shape of the supporting block 26, and the effect of the extreme bending radius of the bendable portion 202 can be improved; the supporting block 26 can fix the shape of the bendable portion 202 of the bent flexible screen body 20 by mutually attaching and fixedly connecting the side surfaces of the supporting block 26, so that a padding block is not required to be introduced, and the purpose of reducing the thickness of the display panel is achieved.

Of course, in other embodiments, in order to reduce the probability of damage to the flexible screen body 20, a step of disposing the buffer layer 21 on the side of the support film 22 away from the flexible screen body 20 may be added between the above step S102 and step S103. Referring to fig. 10 and fig. 3 together, fig. 10 is a schematic structural diagram of an embodiment corresponding to steps S102 to S103 in fig. 6. The buffer layer 21 covers a portion of the first portion 200, and an orthographic projection of the buffer layer 21 on the support film 22 is located outside the first opening 220. Namely, the buffer layer 21 is retracted relative to the support film 22 to provide a space for avoiding, and the influence of the buffer layer 21 on the bending process of the support block 26 is reduced. Alternatively, the cushioning layer 21 may include foam or the like.

In another embodiment, referring to fig. 4 again, the second portion 204 of the flexible screen 20 further includes a bonding region 2040, and the bonding region 2040 is away from the first portion 200 (not shown in fig. 4) relative to the bendable portion (not shown in fig. 4). When the bendable portion is bent, the bonding area 2040 is located below. A bonding pad group 20400 is arranged on the bonding area 2040, and the bonding pad group 20400 comprises a plurality of bonding pads a arranged in the same row; alternatively, the spacing distance between adjacent pads a is the same. Referring to fig. 11, fig. 11 is a schematic flowchart illustrating a method for manufacturing a display panel according to an embodiment of the present application before step S103 in fig. 6. At any step position before the step of bending the display panel to be bent in step S103, the preparation method provided by the present application further includes:

s301: obtaining the expansion coefficient relation between the flexible screen body 20 and the driving circuit carrier 50; the driving circuit carrier 50 includes at least two rows of pin groups 500, each row of pin group 500 includes a plurality of pins 5000 arranged in the same row, and a spacing distance between adjacent pins 5000 in any row of pin groups 500 is different from a spacing distance between adjacent pins 5000 in other pin groups 500. The structure of the specific driving circuit carrier 50 can be seen in fig. 5. S302: a row of pin groups 500 are selected according to the relation of the expansion coefficients, and the pins 5000 in the selected pin groups 500 are in one-to-one correspondence with and are connected with the bonding pads A in the bonding pad group 20400.

Specifically, taking fig. 5 as an example, three rows of pin groups 500, namely a first pin group 500a, a second pin group 500b and a third pin group 500c, are disposed on the driving circuit carrier 50, and a spacing distance D2 between adjacent pins 5000 in the second pin group 500b is equal to a spacing distance D between adjacent pads a in the pad group 20400 in fig. 4; the spacing distance d2 between adjacent pins 5000 in the second pin group 500b is greater than the spacing distance d3 between adjacent pins 5000 in the third pin group 500c and is less than the spacing distance d1 between adjacent pins 5000 in the first pin group 500 a. The specific implementation process of selecting a row of pin groups 500 according to the expansion coefficient relationship in step S302 may be as follows:

A. in response to the difference between the expansion coefficients of the flexible screen 20 and the driver circuit carrier 50 being within a predetermined range, the second pin set 500b is selected. That is, when the flexible screen body 20 and the driving circuit carrier 50 are relatively consistent in expansion and contraction during the bonding process, the second pin group 500b having the same pin 5000 spacing distance as the pad a spacing distance may be selected to be connected to the flexible screen body 20 in a bonding manner.

B. In response to the difference between the expansion coefficients of the flexible screen 20 and the driver circuit carrier 50 being less than the minimum value of the predetermined range, the third pin set 500c is selected. That is, when the expansion degree of the flexible screen body 20 is smaller than that of the driving circuit carrier 50 during the bonding process, the third pin group 500c with pins 5000 having a spacing distance smaller than that of the pads a may be selected to be connected to the flexible screen body 20.

C. In response to the difference between the expansion coefficients of the flexible screen 20 and the driving circuit carrier 50 being greater than the maximum value of the preset range, the first pin group 500a is selected. That is, when the expansion degree of the flexible screen body 20 is greater than that of the driving circuit carrier 50 during the bonding process, the first pin group 500a with the pin 5000 spacing distance greater than the pad a spacing distance may be selected to be connected with the flexible screen body 20.

Of course, in other embodiments, more pin sets may be disposed on the driving circuit carrier 50, and then the appropriate pin set is selected according to the expansion coefficient relationship between the flexible screen 20 and the driving circuit carrier 50.

The above description is only an example of the present application and is not intended to limit the scope of the present application, and all modifications of equivalent structures and equivalent processes, which are made by the contents of the specification and the drawings, or which are directly or indirectly applied to other related technical fields, are intended to be included within the scope of the present application.

Claims

1. A display panel, comprising:

the flexible screen body comprises a first part, a bending part and a second part which are sequentially connected with each other; wherein the first portion and the second portion are stacked and oppositely spaced;

the first supporting layer and the second supporting layer are arranged between the first part and the second part in a laminated mode, the first supporting layer is attached to the first part, and the second supporting layer is attached to the second part;

the support body is directly contacted with the inner surfaces of the bent parts, which are close to the first supporting layer and the second supporting layer, and is used for fixing the bent shape of the bent parts; and the supporting body is formed by mutually and fixedly connecting a plurality of supporting blocks.

2. The display panel according to claim 1, further comprising:

the protective glue covers the outer surfaces of the bending parts, which are far away from the first supporting layer and the second supporting layer; wherein, in a horizontal direction perpendicular to a lamination direction of the first portion to the second portion, a first predetermined interval is provided between an orthographic projection of the protective paste on the first portion and an orthographic projection of the first support layer on the first portion; and/or a second preset distance is reserved between the orthographic projection of the protective glue on the second part and the orthographic projection of the second supporting layer on the second part;

preferably, the first predetermined pitch and the second predetermined pitch are equal;

preferably, the outer surface of the protective adhesive facing away from the first and second support layers is tangent to a first tangent line, and the first tangent line is parallel to the stacking direction from the first portion to the second portion; wherein a first horizontal distance is provided between the first supporting layer and the first tangent, a second horizontal distance is provided between the second supporting layer and the first tangent, and the first horizontal distance is smaller than the second horizontal distance.

3. The display panel according to claim 1,

the supporting block is a curable organic material and has a first curing rate, the supporting body has a second curing rate, the second curing rate is greater than the first curing rate, and the supporting body is formed by mutually contacting and curing the plurality of supporting blocks.

4. The display panel according to claim 1,

before the bending part is bent, a tooth-shaped structure is formed on one side of the supporting blocks, which is far away from the bending part; after the bending part is bent, the supporting blocks are mutually contacted and the tooth-shaped structure is closed at one point;

preferably, the support body is in contact with and fixedly connected with one sides of the first support layer and the second support layer close to the bending part.

5. The display panel according to claim 1,

in the stacking direction from the first portion to the second portion, the bent portion includes a first end connected to the first portion and a second end connected to the second portion; wherein a maximum distance between a side surface of the first end remote from the first portion and a side surface of the second end remote from the second portion is greater than a sum of a thickness of the first portion, a thickness of the second portion, and a distance between the first portion and the second portion;

preferably, in the stacking direction, a buffer layer is further disposed between the first support layer and the second support layer, and a thickness of the buffer layer is smaller than a difference between the maximum thickness and the sum.

6. The display panel according to claim 1, wherein a bonding area is disposed on the second portion, and a bonding pad group is disposed on the bonding area, and the bonding pad group comprises a plurality of bonding pads disposed in the same row;

the display panel further includes: the driving circuit carrier comprises at least two rows of pin groups, each row of pin group comprises a plurality of pins arranged in the same row, and the spacing distance between adjacent pins in any row of pin group is different from the spacing distance between adjacent pins in other pin groups; the bonding pad group is connected with the pin group in one row in a bonding mode;

preferably, the driving circuit carrier is provided with three rows of pin groups, namely a first pin group, a second pin group and a third pin group, wherein the second pin group is located between the first pin group and the third pin group; the spacing distance between adjacent pins in the second pin group is greater than that between adjacent pins in the third pin group and is smaller than that between adjacent pins in the first pin group;

preferably, all of the pin groups have the same axis of symmetry.

7. A method for manufacturing a display panel, comprising:

providing a display panel to be bent, wherein the display panel to be bent comprises a flexible screen body and a support film, the flexible screen body and the support film are arranged in a stacked mode, the flexible screen body comprises a first portion, a bendable portion and a second portion which are sequentially connected with one another, the support film comprises a first opening which is communicated in the stacking direction, and the orthographic projection of the first opening on the flexible screen body covers the bendable portion;

forming a plurality of supporting blocks at the first opening positions, wherein one ends of the supporting blocks, which are far away from the bending parts, are arranged at intervals, and the thickness of the supporting blocks is greater than that of the supporting film;

and bending the display panel to be bent to ensure that the side surfaces of two adjacent supporting blocks are mutually attached and fixedly connected to form a supporting body.

8. The production method according to claim 7,

the plurality of support blocks having a first cure rate when formed at the first open position;

the step of making the side surfaces of two adjacent supporting blocks mutually fit and fixedly connected to form the supporting body comprises the following steps: attaching the side surfaces of two adjacent supporting blocks to each other, and curing the supporting blocks to have a second curing rate by using a curing mechanism; wherein the second cure rate is greater than the first cure rate.

9. The method of manufacturing of claim 8, wherein the step of forming a plurality of support blocks at the first open locations comprises:

forming a shielding layer on one side, away from the flexible screen body, of the support film, wherein the shielding layer is provided with a second opening which is through in the stacking direction, and the orthographic projection of the second opening on the support film is overlapped with the first opening;

forming a support glue layer in the first opening and the second opening;

forming a plurality of grooves on one side of the support adhesive layer, which is far away from the flexible screen body, wherein the support adhesive layer between the adjacent grooves forms at least part of the support block;

preferably, the plurality of grooves form a toothed structure, and the step of making the side surfaces of two adjacent supporting blocks fit and fixedly connected with each other to form the supporting body comprises: and enabling the side surfaces of two adjacent supporting blocks to be mutually attached and enabling the tooth-shaped structure to be closed at one point.

10. The manufacturing method according to claim 1, wherein the second portion further includes a bonding area on which a pad group is disposed, the pad group including a plurality of pads disposed in the same row; before the step of bending the display panel to be bent, the method further comprises the following steps:

obtaining an expansion coefficient relationship between the second portion and the drive circuit carrier; the driving circuit carrier comprises at least two rows of pin groups, each row of pin group comprises a plurality of pins arranged in the same row, and the spacing distance between adjacent pins in any row of pin groups is different from the spacing distance between adjacent pins in other pin groups;

selecting a row of the pin groups according to the relation of the expansion coefficients, and enabling the pins in the selected pin groups to be in one-to-one correspondence with and in bonding connection with the bonding pads in the bonding pad group;

preferably, the driving circuit carrier is provided with three rows of pin groups, which are respectively a first pin group, a second pin group and a third pin group, and a spacing distance between adjacent pins in the second pin group is equal to a spacing distance between adjacent pads in the pad group; the spacing distance between adjacent pins in the second pin group is greater than the spacing distance between adjacent pins in the third pin group and is less than the spacing distance between adjacent pins in the first pin group; the step of selecting a row of the pin groups according to the expansion coefficient relationship comprises:

selecting the second pin group in response to a difference between the coefficients of expansion of the second portion and the driver circuit carrier being within a preset range;

in response to the difference between the expansion coefficients of the second portion and the driving circuit carrier being smaller than the minimum value of the preset range, selecting the third pin group;

and in response to the difference between the expansion coefficients of the second part and the drive circuit carrier being greater than the maximum value of the preset range, selecting the first pin group.