CN114550598A - Flexible display panel, preparation method thereof and display device - Google Patents
Flexible display panel, preparation method thereof and display device Download PDFInfo
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- CN114550598A CN114550598A CN202210282399.1A CN202210282399A CN114550598A CN 114550598 A CN114550598 A CN 114550598A CN 202210282399 A CN202210282399 A CN 202210282399A CN 114550598 A CN114550598 A CN 114550598A
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- G—PHYSICS
- G09—EDUCATION; CRYPTOGRAPHY; DISPLAY; ADVERTISING; SEALS
- G09F—DISPLAYING; ADVERTISING; SIGNS; LABELS OR NAME-PLATES; SEALS
- G09F9/00—Indicating arrangements for variable information in which the information is built-up on a support by selection or combination of individual elements
- G09F9/30—Indicating arrangements for variable information in which the information is built-up on a support by selection or combination of individual elements in which the desired character or characters are formed by combining individual elements
- G09F9/301—Indicating arrangements for variable information in which the information is built-up on a support by selection or combination of individual elements in which the desired character or characters are formed by combining individual elements flexible foldable or roll-able electronic displays, e.g. thin LCD, OLED
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- 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
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- Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
- Y02—TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINST CLIMATE CHANGE
- Y02P—CLIMATE CHANGE MITIGATION TECHNOLOGIES IN THE PRODUCTION OR PROCESSING OF GOODS
- Y02P70/00—Climate change mitigation technologies in the production process for final industrial or consumer products
- Y02P70/50—Manufacturing or production processes characterised by the final manufactured product
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Abstract
The embodiment of the application provides a flexible display panel, a preparation method thereof and a display device, wherein the flexible display panel comprises the following steps: an intermediate support; the first back film layer is arranged on one side of the middle support piece; the second back film layer is arranged on one side, far away from the first back film layer, of the middle supporting piece; the light-emitting unit comprises a display part and a circuit bending part which are connected, the circuit bending part comprises a bending starting end and a bending tail end, the bending starting end is connected with the display part, and the circuit bending part is configured into a bending state so that the bending tail end is bent to one side, away from the middle supporting part, of the second back film layer; the supporting unit is arranged at a position, close to the circuit bending part, of the first back film layer, and the modulus of the supporting unit is larger than that of the first back film layer. Through the flexible display panel, the preparation method thereof and the display device provided by the embodiment of the application, the support strength of the backboard film layer of the flexible display panel can be improved.
Description
Technical Field
The embodiment of the application relates to the technical field of display panels, in particular to a flexible display panel, a preparation method of the flexible display panel and a display device.
Background
Organic Light Emitting Diode (OLED) Display devices are becoming the first choice of screens, and have many advantages of self-luminescence, high Light Emitting efficiency, short response time, high definition and contrast, and the like, and meanwhile, the screens can be ensured to have certain flexibility and adaptability. With the development of flexible display screens, people have an increasing desire for foldable display products.
In order to reduce the size of the screen, in the manufacturing process of the flexible display panel at present, the circuit area of the flexible display panel is bent to be hidden at the back of the display area, along with the technical development of stretchable display and the like, the support back film of the subsequent flexible film layer is developed towards a soft deformable material, namely, the soft deformable material is adopted as the support back film, but when the circuit area is bent, the support back film formed by the soft deformable material has insufficient support capacity at a bending point, so that the problems of abnormal bending appearance of the circuit of the display panel, poor local stress concentration and the like are caused.
Disclosure of Invention
The embodiment of the application provides a flexible display panel, a preparation method thereof and a display device, and aims to improve the local support strength of a flexible display panel backboard support film layer.
A first aspect of an embodiment of the present application provides a flexible display panel, including:
an intermediate support;
a first backing film layer disposed on one side of the intermediate support;
the second back film layer is arranged on one side, far away from the first back film layer, of the middle support piece;
a light emitting unit disposed on a side of the first back film layer away from the intermediate support,
the light-emitting unit comprises a display part and a circuit bending part which are connected, and the display part is arranged on one side of the first back film layer far away from the middle supporting piece and is connected with the first back film layer;
the circuit bending part comprises a bending starting end and a bending tail end, the bending starting end is connected with the display part, and the circuit bending part is configured to be in a bending state so that the bending tail end is bent to one side, away from the middle support part, of the second back film layer;
the supporting unit is arranged at a position, close to the circuit bending part, of the first back film layer, is located on one side, far away from the display part, of the first back film layer, and the modulus of the supporting unit is larger than that of the first back film layer.
Optionally, the supporting unit includes a supporting portion, and the supporting portion is fixedly connected to the first back film layer.
Optionally, the edge of the supporting portion does not exceed the edge of the first back film layer close to the circuit bending portion.
Optionally, the intermediate support member is connected with the first back film layer through a double-sided adhesive tape layer;
one side of the supporting part is connected with the double-sided adhesive tape layer.
Optionally, the support unit includes a support layer and an adhesive layer, and the support layer is connected to the first back film layer through the adhesive layer.
Optionally, the material of the support layer comprises: rigid metal, PI or PET.
Optionally, the light emitting unit is connected with the first back film layer through a double-sided adhesive tape layer;
the supporting layer, the bonding layer and the double-sided adhesive layer are connected through a connecting adhesive layer.
Optionally, the thickness of the support layer is 40 μm to 100 μm, and the thickness of the adhesive layer is 10 μm to 25 μm.
A second aspect of embodiments of the present application provides a display device including a flexible display panel as provided in the first aspect of embodiments of the present application.
A third aspect of the embodiments of the present application provides a method for manufacturing a flexible display panel, where the method includes:
providing a light emitting unit, wherein the light emitting unit comprises a display part and a circuit bending part which are connected; the circuit bending part comprises a bending starting end and a bending tail end, and the bending starting end is connected with the display part;
forming a first back film layer and a second back film layer on one side of the light emitting unit; the first back film layer is connected with the bending starting end, covers the light-emitting unit, and is connected with the bending tail end;
forming a supporting unit on the first back film layer, wherein the supporting unit is positioned on one side of the first back film layer far away from the display part;
forming an intermediate support on one side of the first back film layer far away from the light-emitting unit;
and bending the circuit bending part to ensure that the second back film layer is connected to one side of the middle supporting piece far away from the first back film layer.
Optionally, the support unit comprises a support portion;
forming a support unit on the first back film layer, the method comprising:
and bonding the supporting part on the first back film layer to form the supporting unit, and curing the supporting unit.
Optionally, the support unit includes a support layer and an adhesive layer, and the material of the support layer is a rigid metal, PI, or PET.
Forming a support unit on the first back film layer includes:
and adhering the support layer to the first back film layer through an adhesive layer to form the support unit.
Optionally, the support unit includes a support layer and an adhesive layer, and the support layer is made of PET.
Forming a support unit on the first back film layer includes:
and forming the supporting unit on the first back film layer by laser cutting the supporting layer and the bonding layer, and curing the supporting unit.
Has the advantages that:
the application provides a flexible display panel and a preparation method thereof, and a display device, wherein a supporting unit is arranged at the edge close to a circuit bending part on a first back film layer, and the supporting unit can be used for improving the local supporting strength of the first back film layer at the bending starting end of the circuit bending part, so that the problems of poor bending and local stress concentration when the circuit area of the flexible display panel is bent are reduced, and the yield of the flexible display panel is improved.
Drawings
In order to more clearly illustrate the technical solutions of the embodiments of the present application, the drawings required to be used in the description of the embodiments of the present application will be briefly described below, and it is obvious that the drawings in the description below are only some embodiments of the present application, and it is obvious for those skilled in the art that other drawings may be obtained according to these drawings without inventive labor.
Fig. 1 is a schematic cross-sectional view of a flexible display panel according to an embodiment of the present disclosure;
fig. 2 is a schematic cross-sectional view of a flexible display panel according to an embodiment of the present disclosure;
fig. 3 is a schematic cross-sectional view of another flexible display panel according to an embodiment of the present application;
fig. 4 is a flowchart illustrating steps of a method for manufacturing a flexible display panel according to an embodiment of the present disclosure;
fig. 5 is a schematic cross-sectional structure diagram of a flexible display panel according to an embodiment of the present disclosure, illustrating the fabrication of a light emitting unit, a first back film layer, and a second back film layer;
fig. 6 is a schematic cross-sectional structure diagram illustrating a flexible display panel with a protective film formed thereon according to an embodiment of the present disclosure;
fig. 7 is a schematic diagram illustrating a cutting range of a protection film of a flexible display panel according to an embodiment of the present application;
fig. 8 is a schematic cross-sectional view illustrating a flexible display panel according to an embodiment of the present disclosure after a supporting layer and an intermediate supporting member are fabricated;
fig. 9 is a schematic cross-sectional structure diagram of a flexible display panel according to an embodiment of the present disclosure, illustrating a bending process of a bending circuit.
Description of reference numerals: 10. an intermediate support; 21. a first back film layer; 22. a second back film layer; 30. a light emitting unit; 301. a display unit; 302. a circuit bending part; 3021. bending the starting end; 3022. bending the tail end; 303. gluing layers; 40. a support unit; 401. a support portion; 402. a support layer; 403. a bonding layer; 50. a double-sided adhesive layer; 60. connecting the adhesive layer; 70. a polarizer; 80. a cover plate layer; 90. and (5) protecting the film.
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 some, but not all, embodiments of the present application. 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.
Example one
Referring to fig. 1, a flexible display panel disclosed in an embodiment of the present application includes an intermediate support 10, a first back film layer 21, a second back film layer 22, a light emitting unit 30, and a supporting unit 40, where the light emitting unit 30 includes a display portion 301 and a circuit bending portion 302 connected to each other.
Specifically, the intermediate supporting member 10 may be made of a metal sheet, such as a copper sheet, a copper foil, or a graphite sheet, or a stainless steel sheet in a foldable display panel; the intermediate support 10 may also be a heat sink, for example, a heat dissipation film may be used in a display panel of a straight curved panel type, and is not particularly limited in this embodiment.
Referring to fig. 1, the first back film layer 21 is disposed on one side of the middle support 10, the first back film layer 21 is a flexible film, and in specific application, a common high-molecular low-modulus film, such as a flexible film made of polyolefin or polyurethane, may be selected, so that the display panel may meet a requirement that the curved surface is stretchable and a requirement that the display portion 301 may be partially stretchable, and the display portion 301 may be contoured by the first back film layer 21. Meanwhile, the first back film layer 21 and the middle supporting member 10 are connected through a double-sided adhesive layer 50, and the double-sided adhesive layer 50 can be a foam double-sided adhesive tape.
Referring to fig. 1, the second back film layer 22 is disposed on a side of the intermediate support 10 away from the first back film layer 21, the second back film layer 22 and the first back film layer 21 are made of the same material, and the second back film layer 22 and the intermediate support 10 are also connected by the double-sided adhesive layer 50.
Referring to fig. 1, the light emitting unit 30 is an OLED device, and the light emitting unit 30 includes a display portion 301 and a circuit bending portion 302 connected thereto. The display portion 301 is disposed on a side of the first backside film layer 21 away from the middle supporting member 10, and the display portion 301 and the first backside film layer 21 are connected by a glue material, specifically, the glue material may be acrylate. A glue coating layer 303 is further disposed on an outer side (a side away from the middle support 10) of the circuit bending portion 302, and the glue coating layer 303 can adjust an outward bending force of the circuit bending portion 302. The side of the display part 301 of the light emitting unit 30, which is far away from the first back film layer 21, is further provided with a polarizer 70 and a cover plate layer 80, the polarizer 70 is connected with the display part 301 through a glue material, the cover plate layer 80 may be curved glass, and the cover plate layer 80 is connected with the polarizer 70 through an optical adhesive.
Referring to fig. 1, the circuit bending portion 302 includes a bending start end 3021 and a bending end 3022, the bending start end 3021 is connected to the display portion 301, and the circuit bending portion 302 is configured in a bending state such that the bending end 3022 is bent to a side of the second back film layer 22 away from the intermediate support 10. The first bending end 3021 of the circuit bending portion 302 partially overlaps the first back film 21, and the second bending end 3022 partially overlaps the second back film 22.
In the specific manufacturing process, the circuit bending portion 302 is in an unbent state, the first back film layer 21 and the second back film layer 22 are pasted to the light emitting unit 30 as an integral back film layer, the display portion 301 and the circuit bending portion 302 are covered, the back film layer at the position of the circuit bending portion 302 is cut, the back film layer is divided into the first back film layer 21 and the second back film layer 22, and finally the circuit bending portion 302 is bent, so that the second back film layer 22 is connected to one side of the intermediate support 10 away from the first back film layer 21.
Referring to fig. 1, the supporting unit 40 is disposed at a position of the first back film layer 21 close to the circuit bending portion 302, and the supporting unit 40 is located at a side of the first back film layer 21 far away from the display portion 301. In a specific application, the first back film layer 21 partially extends beyond the middle support 10, the supporting unit 40 is located at a position where the first back film layer 21 extends beyond the middle support, and the supporting unit 40 is formed on the first back film layer 21 before the circuit bending portion 302 is bent, and a modulus of the supporting unit 40 is greater than a modulus of the first back film layer 21. Thus, when the circuit bending portion 302 is bent, due to the arrangement of the supporting unit 40, the supporting strength of the first back film layer 21 located at the bending start end 3021 can be improved, so that the problems of poor bending and local stress concentration of the flexible display panel are reduced, and the yield of the flexible display panel is improved.
In an embodiment, referring to fig. 2, the supporting unit 40 includes a supporting portion 401, the material of the supporting portion 401 may be a curing adhesive, before the circuit bending portion 302 is bent, the supporting portion 401 is coated on the portion of the first backside film layer 21 that exceeds the intermediate supporting member 10, the curing adhesive includes an optical initiator and a cross-linking agent, and after UV irradiation curing or moisture curing, the modulus of the supporting portion 401 may be greater than 100MPa, thereby improving the supporting strength of the first backside film layer 21. The thickness of the support 401 may be 80 μm to 160 μm for a specific application.
Meanwhile, in order to avoid the support 401 from being adhered to the glue coating 303 of the circuit bending part 302, the edge of the support 401 needs not to exceed the edge of the first back film layer 21 close to the circuit bending part 302, so as to reduce the potential stress risk. Also, the supporting portion 401 may be connected with the double-sided adhesive layer 50 between the first back film layer 21 and the intermediate support 10 to further improve the supporting strength of the first back film layer 21.
In one embodiment, as shown with reference to fig. 3, the support unit 40 includes a support layer 402 and an adhesive layer 403, the support layer 402 being connected to the first backing layer 21 by the adhesive layer 403. Specifically, the support layer 402 may be formed on the first back film layer 21 by means of adhesion, or may be formed on the first back film layer 21 by means of laser cutting. The thickness of the support layer 402 may be 40 μm to 90 μm, and the thickness of the adhesive layer 403 may be 10 μm to 25 μm.
When the support layer 402 is formed on the first back film layer 21 by adhesion, the material of the support layer 402 may be a rigid metal or PI, and in this case, the support layer 402 is formed in the same manner as the support layer 401, but the support layer 402 is connected to the first back film layer 21 by an adhesive layer 403, and the adhesive force of the adhesive layer is greater than 500 gf/Inch.
When the support layer 402 is formed on the first backing layer 21 by laser cutting, the material of the support layer 402 may be PET. Specifically, the first back film layer 21 and the second back film layer 22 may be integrally laminated with the material of the support layer 402 in advance, and in a normal process, the protective film 90 needs to be torn off before the intermediate support member 10 and the double-sided adhesive layer 50 are attached, but in this embodiment, before the intermediate support member 10 is attached, the protective film 90, which is originally located on the first back film layer 21 and away from the light emitting unit 30, is cut in a laser cutting manner, so that the protective film 90 forms the support layer shape shown in the diagram 402, and then the remaining support layer 402 and the remaining adhesive layer 403 are subjected to UV tackification treatment, so that the adhesion force of the support layer 402 and the adhesive layer 403 is greater than 500gf/Inch, and thus the remaining support layer is permanently kept at a position close to the bending 3021 of the first back film layer; finally, the intermediate supporting member 10 is attached and the circuit bending portion 302 is bent.
Thus, the supporting unit 40 can be formed on the first back film layer 21, so as to improve the supporting strength of the first back film layer 21, and further reduce the problems of poor bending and local stress concentration of the flexible display panel.
Meanwhile, as shown in fig. 8, in order to better exhibit the supporting and antifouling and dustproof effects, the supporting layer 402 and the adhesive layer 403 may be connected to the double-sided adhesive layer 50 through the connection adhesive layer 60.
Example two
Based on the same inventive concept, an embodiment of the present application provides a display device, including the flexible display panel provided in the first embodiment of the present application.
The display device may be a computer monitor, a television, a billboard, a laser printer with display function, a telephone, a mobile phone, a Personal Digital Assistant (PDA), a laptop computer, a Digital camera, a camcorder, a viewfinder, a vehicle, a large area wall, a screen of a theater, a stadium sign, or the like.
EXAMPLE III
Fig. 4 shows a flow chart of steps of a method of manufacturing a flexible display panel. Referring to fig. 4, an embodiment of the present application provides a method for manufacturing a flexible display panel, which is applied to the flexible display panel described in any of the above embodiments, and the method includes:
step 301: a light emitting unit 30 is provided.
Specifically, the light emitting unit 30 includes a display portion 301 and a circuit bending portion 302 connected to each other, the circuit bending portion 302 includes a bending start end 3021 and a bending end 3022, and the bending start end 3021 is connected to the display portion 301. The step of providing the light emitting unit 30 may include completing the fabrication of the display portion 301, the circuit bending portion 302, the polarizer 70 and the cover plate layer 80, as shown in fig. 5.
Step 302: the first and second back film layers 21 and 22 are formed at one side of the light emitting unit 30.
Specifically, the first back film layer 21 is connected to the bending start end 3021 of the circuit bending portion 302, the first back film layer 21 covers the display portion 301 of the light emitting unit 30, and the second back film layer 22 is connected to the bending end 3022 of the circuit bending portion 302. In a specific application, a back film layer may be covered on one side of the light emitting unit 30, and then the back film layer at the position of the circuit bending portion 302 is cut, so as to form the first back film layer 21 and the second back film layer 22, as shown in fig. 5.
Step 303: the supporting unit 40 is formed on the first back film layer 21, and the supporting unit 40 is located on a side of the first back film layer 21 away from the display portion 301.
Specifically, the supporting unit 40 is located at an edge of the first back film layer 21 close to the circuit bending portion 302.
When the supporting unit 40 is formed of the supporting portion 401, it may be directly connected to the first back film layer 21 by means of adhesion, and at the same time, UV irradiation curing or moisture curing is required for the supporting portion 401, thereby improving the supporting strength of the first back film layer 21.
When the support unit 40 is composed of the support layer 402 and the adhesive layer 403, two cases are specified.
When the support layer 402 is made of rigid metal or PI, the support layer 402 is directly connected to the first backing layer 21 through the adhesive layer 403, and the adhesive force of the adhesive layer is greater than 500 gf/Inch.
When the support layer 402 is PET, the support layer 402 may be formed by laser cutting. Specifically, the first back film layer 21 and the second back film layer 22 may be formed by laminating the supporting layer 402 in advance, and the protective film 90 needs to be torn off before the supporting member 10 and the double-sided tape 50 are attached in a normal process, but in this embodiment, before the intermediate supporting member 10 is attached, the protective film 90 located on the first back film layer 21 and away from the light-emitting unit 30 is not torn off, but the protective film 90 is cut in a laser cutting manner, so that the protective film 90 finally forms the supporting layer 402 on the first back film layer 21, as shown in fig. 6 and 8.
At this time, the laser-cut region needs to be displayed due to the limitation of the cutting heat affected zone, in order to avoid damaging the light emitting unit 30, the distance L1 between the cutting line and the edge of the first backside film layer 21 is required to be not less than 150um, and in order to prevent interference of the middle support 10, the distance L2 between the cutting line and the double-sided adhesive layer 50 and the middle support 10 is required to be not less than 100 um. Furthermore, laser cutting is also required to ensure that four edges of the plane are not cut, such as cutting the flaring void area, as shown in fig. 7.
The remaining support layer 402 is then UV tackified to increase the adhesion between the support layer 402 and the adhesive layer 403 and the first backing layer 21.
Step 304: the intermediate support 10 is formed at a side of the first back film layer 21 away from the light emitting unit 30.
Specifically, the intermediate supporting member 10 may be made of a metal sheet, such as a copper sheet, a copper foil, or a graphite sheet, or a stainless steel sheet in a foldable display panel; the intermediate support 10 may also be a heat sink, for example a heat sink film may be used in a display panel of the straight curved type, as shown in fig. 8.
When the supporting unit 40 is connected to the first back film layer 21 by adhesion, the intermediate support 10 may be attached first, and then the supporting unit 40 may be formed.
Step 305: the circuit bending portion 302 is bent to connect the second backside film 22 to the side of the intermediate support 10 away from the first backside film 21.
In particular, the second backing film layer 22 is connected to the intermediate support 10 by means of a double-sided adhesive layer 50, while a bonding area is provided on the side of the second backing film layer 22 remote from the intermediate support 10, as shown in fig. 9.
By arranging the supporting unit 40 at the edge close to the circuit bending part 302 on the first back film layer 21, the supporting strength of the first back film layer 21 at the bending starting end 3021 of the circuit bending part 302 can be improved by using the supporting unit 40, so that the problems of poor bending and local stress concentration when the circuit area of the flexible display panel is bent are reduced, and the yield of the flexible display panel is improved.
It should be noted that, in the present specification, the embodiments are all described in a progressive manner, each embodiment focuses on differences from other embodiments, and the same and similar parts among the embodiments may be referred to each other.
It should also be noted that, in this document, the terms "center", "upper", "lower", "left", "right", "vertical", "horizontal", "inner", "outer", and the like indicate orientations or positional relationships based on the orientations or positional relationships shown in the drawings, which are only for convenience of description and simplification of description, and do not indicate or imply that the referred device or element must have a specific orientation, be constructed and operated in a specific orientation, and thus, should not be construed as limiting the present application. Moreover, relational terms such as "first" and "second" are used solely to distinguish one entity or action from another entity or action without necessarily requiring or implying any actual such relationship or order between such entities or actions or should not be construed as indicating or implying relative importance. Also, the terms "comprises," "comprising," or any other variation thereof, are intended to cover a non-exclusive inclusion, such that a process, method, article, or terminal that comprises a list of elements does not include only those elements but may include other elements not expressly listed or inherent to such process, method, article, or terminal. Without further limitation, an element defined by the phrase "comprising an … …" does not exclude the presence of other identical elements in the process, method, article, or terminal equipment comprising the element.
The technical solutions provided in the present application are described in detail above, and specific examples are applied herein to explain the principles and embodiments of the present application, and the descriptions of the above examples are only used to help understanding the present application, and the content of the present specification should not be construed as limiting the present application. While various modifications of the illustrative embodiments and applications will be apparent to those skilled in the art based upon this disclosure, it is not necessary or necessary to exhaustively enumerate all embodiments, and all obvious variations and modifications can be resorted to, falling within the scope of the disclosure.
Claims (13)
1. A flexible display panel, comprising:
an intermediate support;
a first backing film layer disposed on one side of the intermediate support;
the second back film layer is arranged on one side, far away from the first back film layer, of the middle support piece;
a light emitting unit disposed on a side of the first back film layer away from the intermediate support,
the light-emitting unit comprises a display part and a circuit bending part which are connected, and the display part is arranged on one side of the first back film layer far away from the middle supporting piece and is connected with the first back film layer;
the circuit bending part comprises a bending starting end and a bending tail end, the bending starting end is connected with the display part, and the circuit bending part is configured to be in a bending state so that the bending tail end is bent to one side, away from the middle support part, of the second back film layer;
the supporting unit is arranged at a position, close to the circuit bending part, of the first back film layer, is located on one side, far away from the display part, of the first back film layer, and the modulus of the supporting unit is larger than that of the first back film layer.
2. The flexible display panel of claim 1, wherein:
the supporting unit comprises a supporting part, and the supporting part is fixedly connected with the first back membrane layer.
3. The flexible display panel of claim 2, wherein:
the edge of the supporting part does not exceed the edge of the first back film layer close to the circuit bending part.
4. The flexible display panel of claim 2, wherein:
the middle supporting piece is connected with the first back film layer through a double-sided adhesive tape layer;
one side of the supporting part is connected with the double-sided adhesive tape layer.
5. The flexible display panel of claim 1, wherein:
the supporting unit comprises a supporting layer and an adhesive layer, and the supporting layer is connected with the first back membrane layer through the adhesive layer.
6. The flexible display panel of claim 5, wherein:
the material of the support layer comprises: rigid metals, PI or PET.
7. The flexible display panel of claim 5, wherein:
the light-emitting unit is connected with the first back film layer through a double-sided adhesive tape layer;
the supporting layer, the bonding layer and the double-sided adhesive layer are connected through a connecting adhesive layer.
8. The flexible display panel of claim 5, wherein:
the thickness of the supporting layer is 40-100 μm, and the thickness of the bonding layer is 10-25 μm.
9. A display device, characterized in that: comprising a flexible display panel according to any one of claims 1-8.
10. A method for manufacturing a flexible display panel, the method comprising:
providing a light emitting unit, wherein the light emitting unit comprises a display part and a circuit bending part which are connected; the circuit bending part comprises a bending starting end and a bending tail end, and the bending starting end is connected with the display part;
forming a first back film layer and a second back film layer on one side of the light emitting unit; the first back film layer is connected with the bending starting end, covers the light-emitting unit, and is connected with the bending tail end;
forming a supporting unit on the first back film layer, wherein the supporting unit is positioned on one side of the first back film layer far away from the display part;
forming an intermediate support on one side of the first back film layer away from the light-emitting unit;
and bending the circuit bending part to ensure that the second back film layer is connected to one side of the middle supporting piece far away from the first back film layer.
11. The method for manufacturing a flexible display panel according to claim 10,
the support unit includes a support portion;
forming a support unit on the first back film layer, the method comprising:
and bonding the supporting part on the first back film layer to form the supporting unit, and curing the supporting unit.
12. The method for manufacturing a flexible display panel according to claim 10, wherein the supporting unit comprises a supporting layer and an adhesive layer, the supporting layer is made of a rigid metal, PI, or PET;
forming a support unit on the first back film layer includes:
and adhering the support layer to the first back film layer through an adhesive layer to form the support unit.
13. The method for manufacturing a flexible display panel according to claim 10, wherein the supporting unit includes a supporting layer and an adhesive layer, the supporting layer is made of PET;
forming a support unit on the first back film layer includes:
and forming the supporting unit on the first back film layer by laser cutting the supporting layer and the bonding layer, and curing the supporting unit.
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