CN111933611B - Display panel and display device - Google Patents

Display panel and display device Download PDF

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Publication number
CN111933611B
CN111933611B CN202010762031.6A CN202010762031A CN111933611B CN 111933611 B CN111933611 B CN 111933611B CN 202010762031 A CN202010762031 A CN 202010762031A CN 111933611 B CN111933611 B CN 111933611B
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protective layer
bending
display panel
flexible substrate
area
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CN202010762031.6A
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CN111933611A (en
Inventor
袁彬彬
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Hefei Visionox Technology Co Ltd
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Hefei Visionox Technology Co Ltd
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Priority to CN202010762031.6A priority Critical patent/CN111933611B/en
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    • HELECTRICITY
    • H01ELECTRIC ELEMENTS
    • H01LSEMICONDUCTOR DEVICES NOT COVERED BY CLASS H10
    • H01L23/00Details of semiconductor or other solid state devices
    • H01L23/48Arrangements for conducting electric current to or from the solid state body in operation, e.g. leads, terminal arrangements ; Selection of materials therefor
    • H01L23/488Arrangements for conducting electric current to or from the solid state body in operation, e.g. leads, terminal arrangements ; Selection of materials therefor consisting of soldered or bonded constructions
    • H01L23/498Leads, i.e. metallisations or lead-frames on insulating substrates, e.g. chip carriers
    • H01L23/4985Flexible insulating substrates
    • GPHYSICS
    • G09EDUCATION; CRYPTOGRAPHY; DISPLAY; ADVERTISING; SEALS
    • G09FDISPLAYING; ADVERTISING; SIGNS; LABELS OR NAME-PLATES; SEALS
    • G09F9/00Indicating arrangements for variable information in which the information is built-up on a support by selection or combination of individual elements
    • G09F9/30Indicating 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
    • G09F9/33Indicating 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
    • HELECTRICITY
    • H01ELECTRIC ELEMENTS
    • H01LSEMICONDUCTOR DEVICES NOT COVERED BY CLASS H10
    • H01L23/00Details of semiconductor or other solid state devices
    • H01L23/48Arrangements for conducting electric current to or from the solid state body in operation, e.g. leads, terminal arrangements ; Selection of materials therefor
    • H01L23/488Arrangements for conducting electric current to or from the solid state body in operation, e.g. leads, terminal arrangements ; Selection of materials therefor consisting of soldered or bonded constructions
    • H01L23/498Leads, i.e. metallisations or lead-frames on insulating substrates, e.g. chip carriers
    • H01L23/49811Additional leads joined to the metallisation on the insulating substrate, e.g. pins, bumps, wires, flat leads
    • HELECTRICITY
    • H01ELECTRIC ELEMENTS
    • H01LSEMICONDUCTOR DEVICES NOT COVERED BY CLASS H10
    • H01L23/00Details of semiconductor or other solid state devices
    • H01L23/562Protection against mechanical damage
    • HELECTRICITY
    • H01ELECTRIC ELEMENTS
    • H01LSEMICONDUCTOR DEVICES NOT COVERED BY CLASS H10
    • H01L23/00Details of semiconductor or other solid state devices
    • H01L23/564Details not otherwise provided for, e.g. protection against moisture
    • YGENERAL 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
    • Y02TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINST CLIMATE CHANGE
    • Y02EREDUCTION OF GREENHOUSE GAS [GHG] EMISSIONS, RELATED TO ENERGY GENERATION, TRANSMISSION OR DISTRIBUTION
    • Y02E10/00Energy generation through renewable energy sources
    • Y02E10/50Photovoltaic [PV] energy
    • Y02E10/549Organic PV cells

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  • Physics & Mathematics (AREA)
  • General Physics & Mathematics (AREA)
  • Engineering & Computer Science (AREA)
  • Condensed Matter Physics & Semiconductors (AREA)
  • Computer Hardware Design (AREA)
  • Microelectronics & Electronic Packaging (AREA)
  • Power Engineering (AREA)
  • Theoretical Computer Science (AREA)
  • Electroluminescent Light Sources (AREA)
  • Devices For Indicating Variable Information By Combining Individual Elements (AREA)

Abstract

The application discloses a display panel and a display device, wherein the display panel comprises: the flexible substrate comprises a display area and a bending area; the array layer group is positioned in the display area at one side of the flexible panel and comprises a plurality of driving circuits; the flexible circuit board is connected to one end of the bending area far away from the display area; the bending wire is connected between the driving circuit and the flexible circuit board, and at least part of the bending wire is positioned in the bending area; the composite protective layer covers one side of the bending wire away from the flexible substrate, and comprises a first protective layer and a second protective layer which are sequentially arranged along the direction away from the flexible substrate, wherein the first protective layer comprises organic glue, the second protective layer comprises waterproof materials, and the elastic modulus of the second protective layer is smaller than that of the first protective layer, so that the bending resistance of the display panel can be improved.

Description

Display panel and display device
Technical Field
The present application relates to the field of display technologies, and in particular, to a display panel and a display device.
Background
The development of information technology provides effective support for the use scene change of the display panel, and in daily life, users pursue higher screen occupation ratio, and have higher requirements on the display panel with narrow frame.
In the prior art, it is common that a part of the non-display area of the display panel is bent to realize a narrow frame, and a metal wiring used for connecting the display area and the flexible circuit board is arranged in the bending area, so that the metal wiring is easy to break in the bending process, and the display panel cannot work normally.
Disclosure of Invention
In view of this, the present application provides a display panel and a display device, which can effectively protect the film layer in the bending region, and improve the bending resistance of the display panel.
In a first aspect, an embodiment of the present application provides a display panel, a flexible substrate, including a display area and a bending area; the array layer group is positioned in the display area at one side of the flexible panel and comprises a plurality of driving circuits; the flexible circuit board is connected to one end of the bending area far away from the display area; the bending wire is connected between the driving circuit and the flexible circuit board, and at least part of the bending wire is positioned in the bending area; the composite protective layer covers one side, far away from the flexible substrate, of the bending wire, the composite protective layer comprises a first protective layer and a second protective layer which are sequentially arranged along the direction far away from the flexible substrate, wherein the first protective layer comprises organic glue, the second protective layer comprises waterproof materials, and the elastic modulus of the second protective layer is smaller than that of the first protective layer.
In an alternative embodiment, the composite protective layer covers the entire inflection region.
In an optional embodiment, the number of the bending wires is multiple, the number of the composite protection layers is multiple, the multiple composite protection layers cover the multiple bending wires, and the multiple composite protection layers are in one-to-one correspondence with the multiple bending wires.
In an alternative embodiment, the first protection layer includes a plurality of through holes penetrating in a thickness direction, and a projection of the second protection layer on a plane on which the first protection layer is located covers at least the through holes.
In an alternative embodiment, the second protective layer includes a first filling portion located within the through hole.
In an alternative embodiment, the first protection layer covers the bending region, the first protection layer includes a first through groove near one end of the display region, and a second through groove near one end of the flexible circuit board, the first through groove and the second through groove disconnect the first protection layer, and the second protection layer includes a second filling portion located in the first through groove and the second through groove.
In an alternative embodiment, the second protective layer is made of a waterproof material; preferably, the waterproof material comprises one or more of acrylic oligomer, polyimide resin, epoxy resin and polyester ink.
In an alternative embodiment, the light emitting device further comprises a light emitting functional layer, and the light emitting functional layer is located on one side of the array layer group away from the flexible substrate and comprises a plurality of light emitting devices, and the plurality of light emitting devices emit light according to driving signals of the plurality of driving circuits.
In an alternative embodiment, the device further comprises a driving chip, wherein the driving chip is located on the flexible circuit board or the driving chip is located on the flexible substrate.
In a second aspect, an embodiment of the present application further provides a display apparatus, including any one of the display panels described above.
According to the technical scheme, the surface of one side, far away from the flexible substrate, of the bending wire in the bending area is covered with the composite protective layer, wherein the composite protective layer comprises the first protective layer and the second protective layer which are sequentially arranged along the direction far away from the flexible substrate, the first protective layer comprises organic glue, the second protective layer comprises waterproof materials, the elastic modulus of the second protective layer is smaller than that of the first protective layer, the bending resistance of the second protective layer is more excellent, so that the composite protective layer can effectively protect the bending wire, and when the first protective layer is cracked, the second protective layer can further prevent external water vapor from invading through cracks of the first protective layer, so that the bending wire is influenced, and the bending resistance of the display panel is improved.
Drawings
Fig. 1 is a schematic top view of a display panel according to an embodiment of the present application;
fig. 2 is a schematic cross-sectional structure of a display panel according to an embodiment of the application;
fig. 3 is a schematic cross-sectional structure of a display panel according to an embodiment of the application;
fig. 4 is a schematic top view of a display panel according to an embodiment of the present application;
fig. 5 is a schematic cross-sectional structure of a display panel according to an embodiment of the application.
Detailed Description
In order that the application may be readily understood, a more complete description of the application will be rendered by reference to the appended drawings. Preferred embodiments of the present application are shown in the drawings. This application 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.
It will be understood that when an element is referred to as being "fixed to" another element, it can be directly on the other element or intervening elements may also be present. When an element is referred to as being "connected" to another element, it can be directly connected to the other element or intervening elements may also be present.
Unless defined otherwise, all technical and scientific terms used herein have the same meaning as commonly understood by one of ordinary skill in the art to which this application belongs. The terminology used herein in the description of the application is for the purpose of describing particular embodiments only and is not intended to be limiting of the application. The term "and/or" as used herein includes any and all combinations of one or more of the associated listed items.
In the display panel in the prior art, such as an Organic Light-Emitting Diode (OLED) display panel, two ends of a bending trace of a bending region are respectively connected with a driving circuit of the display region and a flexible circuit board, and bending of the bending region for multiple times easily causes breakage of the bending trace and causes technical problems of display failure, so that the bending trace of the bending region needs to be protected.
In order to solve the defect, the application provides a display panel, as shown in fig. 1, by covering a composite protective layer on the surface of one side of the bending wire far away from the flexible substrate, the bending resistance of the display panel is improved.
The present application provides a display panel, comprising: a flexible substrate 111 including a display region 110 and a bending region 120; an array layer group 112, which is located in the display area 110 at one side of the flexible panel and includes a plurality of driving circuits; a flexible circuit board 130 connected to an end of the bending region 120 away from the display region 110; a bending trace 121 connected between the driving circuit and the flexible circuit board 130, and at least part of the bending trace 121 is located in the bending region 120; the composite protective layer 122 covers a surface of the bending trace 121 far away from the flexible substrate 111, the composite protective layer 122 includes a first protective layer 1221 and a second protective layer 1222 sequentially disposed along a direction far away from the flexible substrate 111, wherein the first protective layer 1221 includes an organic adhesive, the second protective layer 1222 includes a waterproof material, and an elastic modulus of the second protective layer 1222 is smaller than an elastic modulus of the first protective layer 1221.
Referring to fig. 1 to 5, the display panel includes a flexible substrate 111, the flexible substrate 111 may be made of flexible material such as polyimide, so as to meet the bending requirement of the display panel, an array layer group 112 is disposed on one side of the flexible panel, and a plurality of driving circuits are formed in the array layer group 112, each driving circuit may drive one light emitting device to emit light, and specifically, the driving circuit may be a 7T1C pixel circuit with a threshold voltage compensation function.
A flexible circuit board 130 is formed at one end of the flexible substrate 111, and the flexible circuit board 130 is adjacent to one side of the bending region 120 of the flexible substrate 111, and the flexible circuit board 130 may be a flexible printed circuit board made of polyimide or mylar as a substrate.
The bending region 120 of the flexible substrate 111 includes a bending trace 121, the bending trace 121 is connected between the driving circuit of the array layer group 112 and the flexible circuit board 130, and the flexible circuit board 130 can be electrically connected with the driving circuit of the display region 110 through the bending trace 121. The bending trace 121 is a metal wire with a conductive function, and a specific material may be copper wire, aluminum wire, or alloy.
In this embodiment, the composite protective layer 122 is further included on a side of the bending trace 121 away from the flexible substrate 111, wherein the composite protective layer 122 includes a first protective layer 1221 and a second protective layer 1222, the first protective layer 1221 is located on a side of the second protective layer 1222 near the bending trace 121, the first protective layer 1221 includes an organic adhesive, the second protective layer 1222 includes a waterproof material, and an elastic modulus of the second protective layer 1222 is smaller than an elastic modulus of the first protective layer 1221.
The main component of the first protective layer 1221 is an organic adhesive, specifically polyimide, which is baked and cured to form a film, and has a proper modulus or breaking strength, so that on one hand, the stress support can be provided for the bending wire 121 to balance the tensile stress and the compressive stress suffered by the bending wire 121, so that the bending wire 121 is not easy to break in the bending process; on the other hand, the bending region 120 can be flattened to form a flat surface, which is beneficial to the arrangement of the array wiring on the periphery of the array substrate. However, when the flexible/folding module is folded, the folding area of the screen body needs to be folded by 180 degrees, each film layer at the folding area can be subjected to larger tensile stress, and a large number of metal wires at the position or the first protective layer 1221 is broken in the module manufacturing process or the reliability testing process. When the first protective layer 1221 is cracked, external moisture easily invades and damages the bending trace 121, further exacerbating the problem of poor display. Therefore, the composite protective layer 122 includes the first protective layer 1221 and the second protective layer 1222 sequentially disposed along the direction away from the flexible substrate 111, and the second protective layer 1222 includes a waterproof material, so that the bending wire 121 can be well waterproof, further thinning of the first protective layer 1221 is supported, and bending resistance is improved; on the other hand, the second protective layer 1222 has a smaller elastic modulus than the first protective layer 1221, is more resistant to bending, has a better waterproof effect, and can better adapt to bending requirements.
In one embodiment, the composite protective layer 122 covers the entire inflection region 120.
Specifically, the composite protection layer 122 covers the whole bending region 120, and is of a whole structure, so that the metal wiring of the lower layer can be flattened to form a flat surface, which is beneficial to the formation of the wiring of the array substrate.
In one embodiment, the number of the bending wires 121 is plural, the number of the composite protection layers 122 is plural, the plural composite protection layers 122 cover the plural bending wires 121, and the plural composite protection layers 122 are in one-to-one correspondence with the plural bending wires 121.
The number of the bending wires 121 may be plural, the bending wires 121 extend along a first direction and are arranged along a second direction perpendicular to the first direction, the bending wires 121 are parallel to each other, wherein the first direction may be a direction perpendicular to the display area 110 of the flexible substrate 111 near the edge of the side of the flexible circuit board 130, the second direction may be a direction parallel to the display area 110 of the flexible substrate 111 near the edge of the side of the flexible circuit board 130, the composite protection layer 122 is plural, and the composite protection layers 122 cover the bending wires 121 and correspond to the bending wires 121 one to one. In this way, the area of the continuous composite protective layer 122 can be reduced, which is advantageous for improving the bending resistance.
In one embodiment, the first protective layer 1221 includes a plurality of through holes penetrating in a thickness direction, and the projection of the second protective layer 1222 on the plane of the first protective layer 1221 covers at least the through holes.
The first protection layer 1221 includes a plurality of through holes, which are disposed through the thickness direction of the first protection layer 1221, specifically, in the direction perpendicular to the flexible substrate 111, the through holes may overlap with the bending wires 121, further, the projection of the bending wires 121 on the flexible substrate 111 may cover the projection of the through holes on the flexible substrate 111, and each bending wire 121 may correspond to one through hole, or one bending wire 121 corresponds to a plurality of discrete through holes, wherein the first protection layer 1221 may entirely cover the bending region 120.
Alternatively, the plurality of composite passivation layers 122 cover the plurality of bending traces 121, and the plurality of composite passivation layers 122 are in one-to-one correspondence with the plurality of bending traces 121. The first protection layer 1221 may cover the bending area 120 entirely, the bending wires 121 are multiple, the projection of the through holes of the first protection layer 1221 on the flexible substrate 111 is located between the bending wires 121 with adjacent relation, as shown in fig. 3, the projection shape of each through hole on the flexible substrate 111 includes a strip shape, and the length direction of the strip shape is parallel to the extending direction of the bending wires 121, and the projection shape of the through hole on the flexible substrate 111 may also be a circle, a polygon, etc. By the arrangement, the bending stress of the first protection layer 1221 can be reduced, and the bending resistance of the first protection layer 1221 can be improved, so that the first protection layer 1221 better provides protection for the bending wire 121 of the bending region 120.
As shown in fig. 3 and 5, the projection of the second protective layer 1222 on the plane of the first protective layer 1221 at least covers the through hole, so that the composite protective layer 122 formed by the first protective layer 1221 and the second protective layer 1222 can provide continuous and complete protection for the bending trace 121 of the bending region 120, and reduce the possibility of intrusion of external moisture.
In one embodiment, the second protective layer 1222 includes a first filling 12221 within the via.
The second protective layer 1222 includes a first filling portion 12221 filled in the through hole, and a first covering portion covering one side of the first protective layer 1221 far away from the flexible substrate 111, where the first covering portion covers the first filling portion 12221 and has an area larger than that of the first filling portion 12221, and the first protective layer 1221 and the second protective layer 1222 are embedded with each other through the first filling portion 12221 and the through hole to form the composite protective layer 122, so that on one hand, the two layers of protective layers have better binding force, on the other hand, the first filling portion 12221 is filled in the through hole, water vapor is not easy to gather in the through hole, a complete waterproof system can be formed, and a better protective effect is played on the bending trace 121 of the bending region 120.
It is to be understood that the aperture of the through hole may be small enough so that the second protective layer 1222 covers only the side of the first protective layer 1221 away from the flexible substrate 111, so that the first protective layer 1221 and the second protective layer 1222 can also play a complete role in protecting in the direction perpendicular to the flexible substrate 111, which is not limited by the present application.
In one embodiment, the first protective layer 1221 covers the bending region 120, the first protective layer 1221 includes a first through groove 12211 disposed near one end of the display region 110, and a second through groove 12212 disposed near one end of the flexible circuit board 130, the first through groove 12211 and the second through groove 12212 disconnect the first protective layer 1221, and the second protective layer 1222 includes a second filling portion 12222 disposed in the first through groove 12211 and the second through groove 12212.
As shown in fig. 4, the first through groove 12211 and the second through groove 12212 penetrate the width direction of the display panel, respectively, and the first protective layer 1221 is broken into three parts. In a Chip On Film (COF) process or a substrate bonding (Chip On PI, COP) process, the screen bending wire 121 needs to be bent, and at the bending position, the tensile stress of each Film layer is large, so that the Film layer is easily broken, specifically, the first protective layer 1221 is easily broken. Therefore, the first through groove 12211 is disposed at the end of the first protective layer 1221 near the display area 110, and the second through groove 12212 is disposed at the side of the first protective layer 1221 near the flexible circuit board 130, so that the pulling stress on the bending trace 121 of the bending area 120 is reduced, the risk of physical wire breakage is reduced, and the transmission effect of the stretching stress on the bending trace 121 by the first protective film is blocked to a certain extent.
The second protective layer 1222 includes a second filling portion 12222 filled in the first through groove 12211 and the second through groove 12212, and further, may further include a second covering portion on a side of the first protective layer 1221 away from the flexible substrate 111, the second covering portion covering the second filling portion 12222 and having an area larger than that of the second filling portion 12222. In this way, the bending trace 121 of the bending region 120 can be completely protected, which is beneficial to improving the bending resistance of the display panel.
In one embodiment, the second protective layer 1222 is made of a waterproof material; preferably, the waterproof material comprises one or more of acrylic oligomer, polyimide resin, epoxy resin and polyester ink.
The second protective layer 1222 may be made of a waterproof material, so that the composite protective layer 122 has good waterproof ability.
In one embodiment, the light emitting device further includes a light emitting functional layer 113, which is located on a side of the array layer group 112 away from the flexible substrate 111, and includes a plurality of light emitting devices, and the plurality of light emitting devices emit light according to driving signals of the plurality of driving circuits.
The light emitting functional layer 113 is stacked on a side, far away from the flexible substrate 111, of the array layer group 112 and is located in the display area 110, the light emitting functional layer 113 comprises a pixel defining layer and a plurality of light emitting devices, the pixel defining layer is formed with a plurality of openings, the light emitting devices are located in the openings, the array layer group 112 comprises a plurality of driving circuits, the driving circuits and the light emitting devices are in one-to-one correspondence, and the light emitting devices are driven to emit light.
The display panel may further include a thin film encapsulation layer 114 disposed on a side of the light emitting function layer 113 away from the flexible substrate 111 to block external moisture from invading the light emitting function layer 113 to cause display failure.
In one embodiment, the driving chip 140 is further included, and the driving chip 140 is located on the flexible circuit board 130 or the driving chip 140 is located on the flexible substrate 111.
The embodiment of the application also provides a display device which comprises the display panel of any one of the above.
The display device can be electronic equipment with a display screen, such as a mobile phone, a personal computer, a smart watch, a smart bracelet and the like.
The technical features of the foregoing embodiments may be combined in any manner, and for brevity, all of the possible combinations of the technical features of the foregoing embodiments are not described, however, they should be considered as the scope of the disclosure as long as there is no contradiction between the combinations of the technical features.
The above examples illustrate only a few embodiments of the application, which are described in detail and are not to be construed as limiting the scope of the application. It should be noted that it will be apparent to those skilled in the art that several variations and modifications can be made without departing from the spirit of the application, which are all within the scope of the application. Accordingly, the scope of protection of the present application is to be determined by the appended claims.

Claims (10)

1. A display panel, comprising:
the flexible substrate comprises a display area and a bending area;
the array layer group is positioned in the display area at one side of the flexible panel and comprises a plurality of driving circuits;
the flexible circuit board is connected to one end of the bending area far away from the display area;
the bending wire is connected between the driving circuit and the flexible circuit board, and at least part of the bending wire is positioned in the bending area;
the composite protective layer is covered on one side of the bending wire away from the flexible substrate;
the composite protective layer covers the whole bending area;
the composite protective layer comprises a first protective layer and a second protective layer which are sequentially arranged along the direction far away from the flexible substrate;
the first protective layer comprises organic glue, the second protective layer comprises waterproof material, and the elastic modulus of the second protective layer is smaller than that of the first protective layer;
the first protection layer covers the bending area, the first protection layer comprises a first through groove close to one end of the display area and a second through groove close to one end of the flexible circuit board, the first through groove and the second through groove are disconnected with the first protection layer, and the second protection layer comprises a second filling part located in the first through groove and the second through groove.
2. The display panel according to claim 1, wherein the number of the bending wires is plural, the number of the composite protective layers is plural, the plural composite protective layers cover the plural bending wires, and the plural composite protective layers are in one-to-one correspondence with the plural bending wires.
3. The display panel according to claim 1 or 2, wherein the first protective layer includes a plurality of through holes penetrating in a thickness direction, and a projection of the second protective layer on a plane on which the first protective layer is located covers at least the through holes.
4. A display panel according to claim 3, wherein the second protective layer comprises a first filling portion located within the through hole.
5. The display panel according to claim 1, wherein the second protective layer is made of a waterproof material.
6. The waterproof material according to claim 5, comprising one or more of acrylic oligomer, polyimide resin, epoxy resin, and polyester ink.
7. The display panel according to claim 1, further comprising a light-emitting function layer which is located on a side of the array layer group away from the flexible substrate, and which includes a plurality of light-emitting devices which emit light according to driving signals of the plurality of driving circuits.
8. The display panel of claim 1, further comprising a driver chip on a flexible circuit board or on the flexible substrate.
9. A display panel, comprising:
the flexible substrate comprises a display area and a bending area;
the array layer group is positioned in the display area at one side of the flexible panel and comprises a plurality of driving circuits;
the flexible circuit board is connected to one end of the bending area far away from the display area;
the bending wire is connected between the driving circuit and the flexible circuit board, and at least part of the bending wire is positioned in the bending area;
the composite protective layer is covered on one side of the bending wire away from the flexible substrate;
the composite protective layer comprises a first protective layer and a second protective layer which are sequentially arranged along the direction far away from the flexible substrate;
the first protective layer and the second protective layer cover the whole bending area;
the first protective layer comprises an organic adhesive, the second protective layer comprises a waterproof material, and the elastic modulus of the second protective layer is smaller than that of the first protective layer.
10. A display device comprising the display panel according to any one of claims 1 to 9.
CN202010762031.6A 2020-07-31 2020-07-31 Display panel and display device Active CN111933611B (en)

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