WO2020118906A1 - 显示面板的扇出走线结构及显示面板 - Google Patents

显示面板的扇出走线结构及显示面板 Download PDF

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Publication number
WO2020118906A1
WO2020118906A1 PCT/CN2019/076108 CN2019076108W WO2020118906A1 WO 2020118906 A1 WO2020118906 A1 WO 2020118906A1 CN 2019076108 W CN2019076108 W CN 2019076108W WO 2020118906 A1 WO2020118906 A1 WO 2020118906A1
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Prior art keywords
area
layer
fan
display panel
wiring structure
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Ceased
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PCT/CN2019/076108
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English (en)
French (fr)
Inventor
杨汉宁
Current Assignee (The listed assignees may be inaccurate. Google has not performed a legal analysis and makes no representation or warranty as to the accuracy of the list.)
Wuhan China Star Optoelectronics Semiconductor Display Technology Co Ltd
Original Assignee
Wuhan China Star Optoelectronics Semiconductor Display Technology Co Ltd
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Application filed by Wuhan China Star Optoelectronics Semiconductor Display Technology Co Ltd filed Critical Wuhan China Star Optoelectronics Semiconductor Display Technology Co Ltd
Priority to US16/603,783 priority Critical patent/US11205693B2/en
Publication of WO2020118906A1 publication Critical patent/WO2020118906A1/zh
Anticipated expiration legal-status Critical
Ceased legal-status Critical Current

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Classifications

    • H—ELECTRICITY
    • H10—SEMICONDUCTOR DEVICES; ELECTRIC SOLID-STATE DEVICES NOT OTHERWISE PROVIDED FOR
    • H10D—INORGANIC ELECTRIC SEMICONDUCTOR DEVICES
    • H10D86/00—Integrated devices formed in or on insulating or conducting substrates, e.g. formed in silicon-on-insulator [SOI] substrates or on stainless steel or glass substrates
    • H10D86/40—Integrated devices formed in or on insulating or conducting substrates, e.g. formed in silicon-on-insulator [SOI] substrates or on stainless steel or glass substrates characterised by multiple TFTs
    • H10D86/441—Interconnections, e.g. scanning lines
    • H10D86/443—Interconnections, e.g. scanning lines adapted for preventing breakage, peeling or short circuiting
    • H—ELECTRICITY
    • H10—SEMICONDUCTOR DEVICES; ELECTRIC SOLID-STATE DEVICES NOT OTHERWISE PROVIDED FOR
    • H10D—INORGANIC ELECTRIC SEMICONDUCTOR DEVICES
    • H10D86/00—Integrated devices formed in or on insulating or conducting substrates, e.g. formed in silicon-on-insulator [SOI] substrates or on stainless steel or glass substrates
    • H10D86/40—Integrated devices formed in or on insulating or conducting substrates, e.g. formed in silicon-on-insulator [SOI] substrates or on stainless steel or glass substrates characterised by multiple TFTs
    • H10D86/60—Integrated devices formed in or on insulating or conducting substrates, e.g. formed in silicon-on-insulator [SOI] substrates or on stainless steel or glass substrates characterised by multiple TFTs wherein the TFTs are in active matrices
    • H—ELECTRICITY
    • H10—SEMICONDUCTOR DEVICES; ELECTRIC SOLID-STATE DEVICES NOT OTHERWISE PROVIDED FOR
    • H10K—ORGANIC ELECTRIC SOLID-STATE DEVICES
    • H10K10/00—Organic devices specially adapted for rectifying, amplifying, oscillating or switching; Organic capacitors or resistors having potential barriers
    • H10K10/80—Constructional details
    • H10K10/82—Electrodes
    • H—ELECTRICITY
    • H10—SEMICONDUCTOR DEVICES; ELECTRIC SOLID-STATE DEVICES NOT OTHERWISE PROVIDED FOR
    • H10K—ORGANIC ELECTRIC SOLID-STATE DEVICES
    • H10K50/00—Organic light-emitting devices
    • H10K50/80—Constructional details
    • H10K50/805—Electrodes
    • H—ELECTRICITY
    • H10—SEMICONDUCTOR DEVICES; ELECTRIC SOLID-STATE DEVICES NOT OTHERWISE PROVIDED FOR
    • H10K—ORGANIC ELECTRIC SOLID-STATE DEVICES
    • H10K59/00—Integrated devices, or assemblies of multiple devices, comprising at least one organic light-emitting element covered by group H10K50/00
    • H10K59/10—OLED displays
    • H10K59/12—Active-matrix OLED [AMOLED] displays
    • H10K59/131—Interconnections, e.g. wiring lines or terminals
    • G—PHYSICS
    • G09—EDUCATION; CRYPTOGRAPHY; DISPLAY; ADVERTISING; SEALS
    • G09G—ARRANGEMENTS OR CIRCUITS FOR CONTROL OF INDICATING DEVICES USING STATIC MEANS TO PRESENT VARIABLE INFORMATION
    • G09G2300/00—Aspects of the constitution of display devices
    • G09G2300/04—Structural and physical details of display devices
    • G09G2300/0421—Structural details of the set of electrodes
    • G09G2300/0426—Layout of electrodes and connections
    • G—PHYSICS
    • G09—EDUCATION; CRYPTOGRAPHY; DISPLAY; ADVERTISING; SEALS
    • G09G—ARRANGEMENTS OR CIRCUITS FOR CONTROL OF INDICATING DEVICES USING STATIC MEANS TO PRESENT VARIABLE INFORMATION
    • G09G2380/00—Specific applications
    • G09G2380/02—Flexible displays

Definitions

  • the present invention relates to the field of display technology, in particular to a fan-out wiring structure of a display panel and a display panel.
  • the source and drain traces 92 and 93 of the bending region 91 of the current display panel are metal traces with specific shapes prepared by photolithography over the deep hole layer.
  • the source and drain traces 92 and 93 are not in the bent neutral layer, and the source and drain traces 92 and 93 are lined.
  • the bottom is susceptible to stress damage when bent, and the source and drain traces 92 and 93 traces are susceptible to damage from external forces during the assembly process.
  • An object of the present invention is to provide a fan-out wiring structure of a display panel to enhance the structural strength and stress resistance of the source and drain wirings of the substrate bending region of the display panel.
  • the present invention provides a fan-out wiring structure of a display panel for electrically connecting a signal transmission interface of a driving circuit and a signal receiving interface of the display area of the display panel, characterized in that the fan-out routing
  • the wire structure includes a first wire layer and a second wire layer above the first wire layer, and the first wire layer and the second wire layer are respectively defined to be connected to the display area
  • the portion of the extension area, the portion of the connection area and the bending area are located directly above the filler hole, wherein the extension area and the connection area of the first trace layer respectively include several metal wires
  • the bending area of the first wiring layer includes a plurality of flexible wires, each of the flexible wires is made of an organic conductive material, and opposite ends of the flexible wire are respectively connected to the extensions on the filler holes
  • the present invention further provides a fan-out wiring structure of a display panel for electrically connecting a signal transmission interface of a driving circuit and a signal receiving interface of the display area of the display panel, characterized in that the fan-out wiring structure includes a A trace layer and a second trace layer above the first trace layer, and the first trace layer and the second trace layer respectively define an extension area connected to the display area, A connection area connected to the signal transmission interface, and a bending area between the extension area and the connection area, wherein the extension area and the connection area of the first trace layer respectively include several metal wires,
  • the bending area of the first wiring layer includes a plurality of flexible wires, each flexible wire is made of an organic conductive material, and two opposite ends of the flexible wire are respectively connected to the extension area and the Corresponding metal wires in the connection area.
  • the second trace layer includes at least one wire, which includes a trunk portion and a branch portion, wherein the trunk portion passes from the extension area through the bending area and extends to the A connection area, and the branch portion extends laterally in the extension area, and an end of the branch portion away from the trunk portion extends toward the direction of the connection area through the bending area, wherein the main portion
  • the portion of the stem and branch located in the bending area is a flexible wire made of organic conductive material
  • the portion of the stem and branch located in the extension area and connection area is a metal wire made of metal material .
  • the second trace layer includes at least one wire, which is made of a metal material, and includes a trunk portion and a branch portion, wherein the trunk portion passes through the extension area through the The bending area extends to the connection area, and the branch portion extends laterally in the extension area, and an end of the branch portion away from the trunk portion passes through the bending area toward the connection area Direction.
  • the opposite ends of the flexible wire respectively have a contact portion, which is bent upward and extends toward the corresponding metal wire to increase the flexible wire and the corresponding The contact range of the metal wire.
  • it further comprises a base material layer and a filler hole provided on the base material layer, wherein the portion of the extension area, the portion of the connection area and the bending area are located in the The filler hole is directly above, and the flexible wire and the metal wire of the first wiring layer are in contact and electrically connected on the filler hole.
  • a first dielectric layer is provided between one side of the filler hole and the first trace layer and the substrate layer, and the first trace layer and A second dielectric layer is provided between the second trace layers.
  • a functional layer and a first dielectric layer provided on the functional layer are provided between the other side of the filler hole and the first trace layer, wherein the The functional layer includes a barrier layer provided on the base material layer, a buffer layer provided on the barrier layer, and a gate insulating layer provided on the buffer layer.
  • the organic conductive material is a self-conducting organic material, including small molecules, large molecules and polymer materials.
  • the organic conductive material is an organic material doped with conductive particles, wherein the conductive particles include metal nano- and micro-particles, graphene, carbon nanotubes and other micro-nano conductive materials.
  • the present invention provides a display panel including a fan-out wiring structure, characterized in that the fan-out wiring structure adopts the fan-out wiring structure of the foregoing embodiment.
  • the fan-out wiring structure of the present invention uses flexible conductive wires of organic conductive materials in the first wiring layer relative to the bending area, or at the same time uses flexible wires of the organic conductive material in the second wiring layer relative to the bending area
  • the wire replaces the traditional metal trace to increase the strain resistance and structural strength of the trace in the bending area, effectively avoiding damage or breakage of the source and drain traces due to bending or external forces, resulting in the problem of poor display.
  • FIG. 1 is a schematic diagram of a fan-out wiring structure in the prior art.
  • FIG. 2 is a schematic diagram of a fan-out wiring structure of a display panel according to a preferred embodiment of the present invention.
  • FIG. 3 is a schematic cross-sectional view of the fan-out wiring structure of FIG. 2.
  • FIG. 4 is a schematic diagram of a fan-out wiring structure of a display panel according to another preferred embodiment of the present invention.
  • FIG. 5 is a schematic cross-sectional view of the fan-out wiring structure of FIG. 4.
  • FIG. 6 is a flowchart of a fan-out wiring structure for manufacturing a display panel according to a preferred embodiment of the present invention.
  • FIG. 7 is a flowchart of a fan-out wiring structure for manufacturing a display panel according to another preferred embodiment of the present invention.
  • the present invention is a fan-out wiring structure, which includes a first wiring layer 1 and a second wiring layer 2 located above the first wiring layer 1.
  • the fan-out wiring structure is provided on opposite side frames of the display panel 3, that is, the curved edges on both sides of the display panel 3, wherein the display panel 3 is an organic light-emitting display panel.
  • the fan-out wiring structure is located in the fan-out area 302 of the display panel 3, and is used to electrically connect the signal transmission interface 303 (ie, chip binding area) of the driving circuit and the display panel 3 The signal receiving interface of the display area 301.
  • the first trace layer 1 and the second trace layer 2 respectively define an extension area 101 connected to the display area 301 and a connection area 103 connected to the signal transmission interface 303 And a bending area 102 located between the extension area 101 and the connection area 103, wherein the bending area 102 corresponds to a bending position of the frame of the display panel 3.
  • the first wiring layer 1 includes several wires
  • the second wiring layer 2 includes at least one wire, wherein the wires of the first wiring layer 1 and the second wiring layer 2 are all
  • the source and drain traces of the display panel 3 are described.
  • the extension area 101 of the first trace layer 1 includes a plurality of metal wires 11, the connection area 103 includes a plurality of metal wires 13, and the bending area 102 includes a plurality of flexible wires 12 .
  • each flexible wire 12 is made of an organic conductive material, and the opposite ends of the flexible wire 12 are connected to the corresponding metal wires 11 and 13 in the extension area 101 and the connection area 103, respectively .
  • each wire of the first trace layer 1 is composed of different materials.
  • the organic conductive material is a self-conducting organic material, including small molecules, macromolecules and polymer materials, such as poly(3,4-ethylenedioxythiophene): polystyrene sulfonate Acid salt (PEDOT:PSS).
  • the organic conductive material may be an organic material doped with conductive particles, wherein the conductive particles include metal nano- and micro-particles, graphene, carbon nanotubes and other micro-nano conductive materials.
  • the fan-out wiring structure of the display panel of the present invention further includes a substrate layer 31 and a filler hole 30 provided on the substrate layer 31, wherein the material of the substrate layer 31 is polyimide
  • the filler hole 30 is a curved region corresponding to the frame portion.
  • the filler hole 30 may be deposited with a polymer material or an organic material to enhance the bending resistance of the frame portion. As shown in FIG.
  • the portion of the extension area 101, the portion of the connection area 103, and the bending area 102 are located directly above the filler hole 30, and the flexible wire 12 of the first trace layer 1
  • the metal wires 11 and 13 are in contact with the filler hole 30 to be electrically connected.
  • a first dielectric layer 33 is provided between one side of the filler hole 30 and the first wiring layer 1 and the base material layer 31, and the first wiring layer 1 and all
  • a second dielectric layer 34 is provided between the second trace layer 2.
  • a functional layer 32 and a first dielectric layer 1 provided on the functional layer 32 are provided between the other side of the filler hole 30 and the first trace layer 1,
  • the functional layer 32 includes a barrier layer 321 provided on the substrate layer 31, a buffer layer 322 provided on the barrier layer 321, and a gate insulating layer 323 provided on the buffer layer 322.
  • the two opposite ends of the flexible wire 12 of the first trace layer 1 respectively have a contact portion 121, which is bent upward and extends toward the corresponding metal wires 11 and 13 to increase the The contact range of the flexible wire 12 and the corresponding metal wires 11 and 13 ensures a stable electrical connection.
  • the second trace layer 2 includes at least one wire made of a metal material, and includes a main portion 21 and a branch portion 22, wherein the main portion 21 is formed by the extension area 101 passes through the bending area 102 and extends to the connecting area 103, and the branch portion 22 extends laterally from the extension area 101, and the end of the branch portion 22 away from the trunk portion 21 is further passed
  • the bending region 102 extends toward the connecting region 103 so that the branch portion 22 has an inverted L shape.
  • the trunk portion 21 and the branch portion 22 are made of the same metal material, that is, at least one wire of the second trace layer 2 is made of the same metal material.
  • FIG. 4 is a schematic diagram of a fan-out wiring structure of a display panel according to another preferred embodiment of the present invention.
  • 5 is a schematic cross-sectional view of the fan-out wiring structure of FIG. 4.
  • the embodiments shown in FIG. 4 and FIG. 5 are the same as the embodiments of FIG. 2 and FIG. 3, most of the structures of the two embodiments are the same, including the first trace layer 1 and the second trace layer 2, which are respectively defined with extensions The area 101, the bending area 102 and the connection area 103, and other similar structures are not repeated here.
  • the main difference between the fan-out wiring structure of FIG. 4 and FIG. 2 is the second wiring layer 2.
  • the second trace layer 2 includes at least one wire, which includes a trunk portion 21 and a branch portion 22, wherein the trunk portion 21 extends from the extension area 101 through the bending area 102 and extends To the connection area 103, and the branch portion 22 extends laterally from the extension area 101, and an end of the branch portion 22 away from the trunk portion 21 passes through the bending area 102 toward the connection
  • the direction of the area 103 extends to connect to the signal transmission interface 303.
  • the portion of the trunk portion 21 and the branch portion 22 in the bending region 102 is a flexible wire 23 made of an organic conductive material, and the trunk portion 21 and the branch portion 22 are located at the extension
  • the area 101 and the connection area 103 are metal wires 210 and 220 made of metal materials.
  • the material of the flexible wire 23 of the second wiring layer 2 may be the same as the material of the flexible wire 12 of the first wiring layer 2.
  • the fan-out wiring structure of the present invention utilizes the flexible wires 12 of the organic conductive material relative to the wires of the first wiring layer 1 relative to the bending area 102, or the wires of the second wiring layer 2 relative to the bending area 102 at the same time Flexible conductive wires 23 made of organic conductive materials, instead of traditional metal traces, are used to increase the strain resistance and structural strength of the traces in the bending zone 102 to effectively avoid damage or breakage of the source and drain traces due to bending or external forces , Causing problems with poor display.
  • the present invention further provides a display panel 3, which includes the fan-out wiring structure as described above, wherein the detailed structure of the fan-out wiring structure has been described in detail in the foregoing embodiments of FIG. 2 to FIG. 5, and is not repeated here. repeat.
  • FIG. 6 is a flowchart of manufacturing a fan-out wiring structure of a display panel according to a preferred embodiment of the present invention, wherein the structure of the display panel has been detailed in the previous embodiments and will not be repeated here.
  • the method for manufacturing a fan-out wiring structure shown in FIG. 6 includes the following steps. Step S11: Evenly coat a layer of photoresist on the bending area of the display panel. Step S12: Expose the photoresist at the corresponding position of each source and drain trace in the bending area.
  • Step S13 Develop the exposed photoresist at the corresponding positions of the source and drain traces in the bending area, the exposed photoresist is stripped, and grooves appear at the corresponding positions of the source and drain traces.
  • the width of the groove is the same as the width of the source and drain traces, and the depth of the groove is the thickness of the photoresist layer.
  • Step S14 processing a layer of organic conductive material in the bending area by means of evaporation, coating, inkjet printing and the like.
  • Step S15 Strip the photoresist in other regions outside the source and drain traces, and the conductive layer on the photoresist is also stripped at the same time, to form a flexible wire based on the organic conductive material.
  • the other parts of the source and drain traces form metal wires made of metal materials.
  • the flexible wire is above the source and drain traces before and after the bending zone, and the two are connected by mutual contact.
  • FIG. 7 is a flowchart of manufacturing a fan-out wiring structure of a display panel according to another preferred embodiment of the present invention.
  • the structure of the display panel has been described in detail in the previous embodiments and will not be repeated here.
  • the method for manufacturing a fan-out wiring structure shown in FIG. 7 includes the following steps. Step S21: uniformly coat a layer of organic conductive material on the bending area of the display panel to form an organic conductive layer. Step S22: coat a layer of photoresist on the organic conductive layer in the bending area.
  • Step S23 Expose the photoresist at the corresponding position of the source and drain traces in the bending area, the width of the exposed photoresist is the same as the width of the source and drain traces, and photolithography
  • the thickness of the glue layer is the depth of the groove, which is used to form the source and drain traces of the bending region.
  • Step S24 Subsequently, the photoresist and the organic conductive layer in the unexposed area of the bending area are stripped, leaving only the organic conductive material corresponding to the source and drain trace areas and the exposed photoresist.
  • Step S25 developing and stripping the exposed photoresist to form a flexible wire based on the organic conductive material.
  • the other parts of the source and drain traces form metal wires made of metal materials.
  • the flexible wire is above the source and drain traces before and after the bending zone, and the two are connected by mutual contact.

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  • Engineering & Computer Science (AREA)
  • Microelectronics & Electronic Packaging (AREA)
  • Physics & Mathematics (AREA)
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  • Electroluminescent Light Sources (AREA)
  • Devices For Indicating Variable Information By Combining Individual Elements (AREA)

Abstract

一种显示面板的扇出走线结构，用以电性连接驱动电路的信号传送接口及显示面板的显示区的信号接收接口。扇出走线结构包含第一走线层及位于第一走线层上方的第二走线层，且第一走线层及第二走线层分别定义有延伸区、连接区，及位于延伸区及连接区之间的弯折区。第一走线层的延伸区及连接区分别包括数条金属导线，而第一走线层的弯折区包括数条柔性导线。每一柔性导线为有机导电材料所制，且柔性导线的相对二端分别连接位于延伸区及连接区相应的金属导线。

Description

显示面板的扇出走线结构及显示面板 技术领域
本发明涉及显示技术领域，特别是涉及一种显示面板的扇出走线结构及显示面板。
 背景技术
随着显示技术的发展，对于高屏占比的显示器的需求越来越高，因此显示器四周的边框越来越小。通过衬底弯折(pad bending)的方法提高屏占比成为有效地技术手段，为实现更大的屏占比，需要不断减小弯折区的弯折半径。而较小的弯折半径易导致弯折区的源极和漏极走线更易受到应力损伤发生断裂，进而导致面板的显示区出现不良。如图1所示，现行显示面板的弯折区91的源极和漏极走线92及93为在深孔层上方光刻制备的具有特定形状的金属走线。由于金属走线上下两侧的有机层厚度不一样，源极和漏极走线92及93走线未在弯折的中性层，源极和漏极走线92及93走线在进行衬底弯折时易受应力损伤，且源极和漏极走线92及93走线在组装过程中易受外力的损伤。
 技术问题
本发明的目的在于提供一种显示面板的扇出走线结构，用以增强显示面板的衬底弯折区域的源极及漏极走线的结构强度及抗应力性。
 技术解决方案
为实现上述目的，本发明提供一种显示面板的扇出走线结构，用以电性连接驱动电路的信号传送接口及所述显示面板的显示区的信号接收接口，其特征在于，所述扇出走线结构包含第一走线层及位于所述第一走线层上方的第二走线层，且所述第一走线层及所述第二走线层分别定义有连接于所述显示区的延伸区、连接于所述信号传送接口的连接区，及位于所述延伸区及所述连接区之间的弯折区，及基材层及设于所述基材层上的填料孔，其中所述延伸区的部分、连接区的部分及所述弯折区分别位于所述填料孔的正上方，其中所述第一走线层的延伸区及连接区分别包括数条金属导线，所述第一走线层的弯折区包括数条柔性导线，所述每一柔性导线为有机导电材料所制，且所述柔性导线的相对二端分别连接位于所述填料孔上的所述延伸区及所述连接区相应的金属导线，并分别具有一接触部，其向上弯折并朝所述相应的金属导线延伸，用以增加所述柔性导线和所述相应的金属导线的接触范围。
本发明另外提供一种显示面板的扇出走线结构，用以电性连接驱动电路的信号传送接口及所述显示面板的显示区的信号接收接口，其特征在于，所述扇出走线结构包含第一走线层及位于所述第一走线层上方的第二走线层，且所述第一走线层及所述第二走线层分别定义有连接于所述显示区的延伸区、连接于所述信号传送接口的连接区，及位于所述延伸区及所述连接区之间的弯折区，其中所述第一走线层的延伸区及连接区分别包括数条金属导线，而所述第一走线层的弯折区包括数条柔性导线，所述每一柔性导线为有机导电材料所制，且所述柔性导线的相对二端分别连接位于所述延伸区及所述连接区相应的金属导线。
依据本发明的一优选实施例，所述第二走线层包括至少一导线，其包括主干部及分支部，其中所述主干部由所述延伸区通过所述弯折区并延伸至所述连接区，而所述分支部横向延伸设置于所述延伸区，且所述分支部远离所述主干部的一端更通过所述弯折区而朝向所述连接区的方向延伸，其中所述主干部及分支部位于所述弯折区的部分为有机导电材料所制的柔性导线，而所述主干部及所述分支部位于所述延伸区及连接区的部分为金属材料所制的金属导线。
依据本发明的另一优选实施例，所述第二走线层包括至少一导线，其为金属材料所制，并包括主干部及分支部，其中所述主干部由所述延伸区通过所述弯折区并延伸至所述连接区，而所述分支部横向延伸设置于所述延伸区，且所述分支部远离所述主干部的一端更通过所述弯折区而朝向所述连接区的方向延伸。
依据本发明的另一优选实施例，所述柔性导线的相对二端分别具有一接触部，其向上弯折并朝所述相应的金属导线延伸，用以增加所述柔性导线和所述相应的金属导线的接触范围。
依据本发明的另一优选实施例，更包含基材层及设于所述基材层上的填料孔，其中所述延伸区的部分、连接区的部分及所述弯折区分别位于所述填料孔的正上方，且所述第一走线层的柔性导线及金属导线于所述填料孔上接触而电性连接。
依据本发明的另一优选实施例，所述填料孔的一侧与所述第一走线层及所述基材层之间设有第一介电层，而所述第一走线层及所述第二走线层之间设有第二介电层。
依据本发明的另一优选实施例，所述填料孔的另一侧与所述第一走线层之间设有功能层及设于所述功能层上的第一介电层，其中所述功能层包括设于所述基材层上的屏障层、设于所述屏障层上的缓冲层，及设于所述缓冲层上的栅极绝缘层。
依据本发明的另一优选实施例，所述有机导电材料为自身导电的有机材料，包括小分子，大分子及高分子材料。
依据本发明的另一优选实施例，所述有机导电材料为导电粒子掺杂的有机材料，其中所述导电粒子包括金属纳米及微米粒子、石墨烯、碳纳米管等微纳导电材料。
本发明提供一种显示面板，包括扇出走线结构，其特征在于，所述扇出走线结构采用前述实施例的扇出走线结构。
 有益效果
本发明扇出走线结构于第一走线层相对于弯折区的导线，利用有机导电材料的柔性导线，或同时于第二走线层相对于弯折区的导线，利用有机导电材料的柔性导线，取代传统的金属走线，用以增加弯折区走线的抗应变性及结构强度，有效避免由于弯折或外力导致源极及漏极走线损伤或断裂，造成显示不良的问题。
 附图说明
图1为现有技术的扇出走线结构的示意图。
图2为根据本发明一较佳实施例的显示面板的扇出走线结构的示意图。
图3为图2的扇出走线结构的剖面示意图。
图4为根据本发明另一较佳实施例的显示面板的扇出走线结构的示意图。
图5为图4的扇出走线结构的剖面示意图。
图6为根据本发明一较佳实施例的制作显示面板的扇出走线结构的流程图。
图7为根据本发明另一较佳实施例的制作显示面板的扇出走线结构的流程图。
 本发明的最佳实施方式
以下各实施例的说明是参考附加的图式，用以例示本发明可用以实施的特定实施例。本发明所提到的方向用语，例如「上」、「下」、「前」、「后」、「左」、「右」、「内」、「外」、「侧面」等，仅是参考附加图式的方向。因此，使用的方向用语是用以说明及理解本发明，而非用以限制本发明。
图2为根据本发明一较佳实施例的显示面板的扇出走线结构的示意图。本发明为一种扇出走线结构，其包括第一走线层1及位于所述第一走线层1上方的第二走线层2。所述扇出走线结构设于显示面板3的相对二侧边框，亦即所述显示面板3二侧的弯曲边缘处，其中所述显示面板3为有机发光显示面板。如图2所示，所述扇出走线结构位于所述显示面板3的扇出区域302，用以电性连接驱动电路的信号传送接口303(亦即芯片绑定区)及所述显示面板3的显示区301的信号接收接口。
续请参阅图2，所述第一走线层1及所述第二走线层2分别定义有连接于所述显示区301的延伸区101、连接于所述信号传送接口303的连接区103，及位于所述延伸区101及所述连接区103之间的弯折区102，其中所述弯折区102即是对应于所述显示面板3的边框弯曲处。所述第一走线层1包括数条导线，而所述第二走线层2包括至少一导线，其中所述第一走线层1及所述第二走线层2的导线即为所述显示面板3的源极及漏极走线。
如图2所示，所述第一走线层1的延伸区101包括数条金属导线11，所述连接区103包括数条金属导线13，而所述弯折区102包括数条柔性导线12。特别说明的是，所述每一柔性导线12为有机导电材料所制，且所述柔性导线12的相对二端分别连接位于所述延伸区101及所述连接区103相应的金属导线11及13。换句换说，所述第一走线层1的每一条导线是由不同的材料所构成。于此较佳实施例中，所述有机导电材料为自身导电的有机材料，包括小分子，大分子及高分子材料，例如聚(3,4-亚乙二氧基噻吩)：聚苯乙烯磺酸盐（PEDOT:PSS）。于另一具体实施例中，所述有机导电材料可为导电粒子掺杂的有机材料，其中所述导电粒子包括金属纳米及微米粒子、石墨烯、碳纳米管等微纳导电材料。
图3为图2的扇出走线结构的剖面示意图。如图3所示，本发明显示面板的扇出走线结构更包含基材层31及设于所述基材层31上的填料孔30，其中所述基材层31的材料为聚酰亚胺，而所述填料孔30即是对应边框部位的弯曲区域，所述填料孔30可沉积有聚合物材料或有机材料，用以增强边框部位的耐弯性。如图3所示，所述延伸区101的部分、连接区103的部分及所述弯折区102分别位于所述填料孔30的正上方，且所述第一走线层1的柔性导线12及金属导线11及13于所述填料孔30上接触而电性连接。具体而言，所述填料孔30的一侧与所述第一走线层1及所述基材层31之间设有第一介电层33，而所述第一走线层1及所述第二走线层2之间设有第二介电层34。此外，如图3所示，所述填料孔30的另一侧与所述第一走线层1之间设有功能层32及设于所述功能层32上的第一介电层1，其中所述功能层32包括设于所述基材层31上的屏障层321、设于所述屏障层321上的缓冲层322，及设于所述缓冲层322上的栅极绝缘层323。
续请参阅图3，所述第一走线层1的柔性导线12的相对二端分别具有一接触部121，其向上弯折并朝所述相应的金属导线11及13延伸，用以增加所述柔性导线12和所述相应的金属导线11及13的接触范围，确保稳固的电性连接。
续请参阅图2及图3，所述第二走线层2包括至少一导线，其为金属材料所制，并包括主干部21及分支部22，其中所述主干部21由所述延伸区101通过所述弯折区102并延伸至所述连接区103，而所述分支部22横向延伸设置于所述延伸区101，且所述分支部22远离所述主干部21的一端，更通过所述弯折区102而朝向所述连接区103的方向延伸，使所述分支部22具有一倒转的L型。于此较佳实施例中，所述主干部21及分支部22分别为相同的金属材料所制，亦即所述第二走线层2的至少一导线为相同的金属材料所制。
图4为根据本发明另一较佳实施例的显示面板的扇出走线结构的示意图。图5为图4的扇出走线结构的剖面示意图。图4及图5所示的实施例与图2及图3的实施例，二者实施例的大部分结构相同，包括第一走线层1及第二走线层2，其分别定义有延伸区101、弯折区102及连接区103，其他相同的构造于此不在复述。图4的扇出走线结构与图2的主要区别在于所述第二走线层2。
如图4所示，所述第二走线层2包括至少一导线，其包括主干部21及分支部22，其中所述主干部21由所述延伸区101通过所述弯折区102并延伸至所述连接区103，而所述分支部22横向延伸设置于所述延伸区101，且所述分支部22远离所述主干部21的一端更通过所述弯折区102而朝向所述连接区103的方向延伸而连接至所述信号传送接口303。特别说明的是，所述主干部21及分支部位22于所述弯折区102的部分为有机导电材料所制的柔性导线23，而所述主干部21及所述分支部22位于所述延伸区101及连接区103的部分为金属材料所制的金属导线210及220。所述第二走线层2的柔性导线23的材料可为相同于所述第一走线层2的柔性导线12的材料。
本发明扇出走线结构于第一走线层1相对于弯折区102的导线，利用有机导电材料的柔性导线12，或同时于第二走线层2相对于弯折区102的导线，利用有机导电材料的柔性导线23，取代传统的金属走线，用以增加弯折区102走线的抗应变性及结构强度，有效避免由于弯折或外力导致源极及漏极走线损伤或断裂，造成显示不良的问题。
本发明另外提供一种显示面板3，其包括如前所述的扇出走线结构，其中所述扇出走线结构的细部结构已详述于前述图2至图5的实施例，于此不再复述。
本发明更提供一种制作显示面板的扇出走线结构的方法。图6为根据本发明一较佳实施例的制作显示面板的扇出走线结构的流程图，其中所述显示面板的构造已详述于先前实施例，于此不再复述。图6所示制作扇出走线结构的方法包括下列步骤。步骤S11：在显示面板的弯折区均匀涂布一层光刻胶。步骤S12：对所述弯折区的每一源极及漏极走线对应位置的光刻胶进行曝光。步骤S13：对所述弯折区的源极及漏极走线对应位置曝光后的光刻胶进行显影，曝光后的光刻胶被剥离，源极及漏极走线对应位置出现凹槽，其中所述凹槽的宽度与源极及漏极走线的宽度相同，而所述凹槽深度为光刻胶层的厚度。步骤S14：在所述弯折区通过蒸镀、涂布、喷墨打印等手段加工一层有机导电材料层。步骤S15：对源极及漏极走线外其他区域的光刻胶进行剥离，光刻胶上的导电层也同时被剥离，用以形成基于所述有机导电材料的柔性导线。所述源极及漏极走线的其他部分则形成金属材料所制的金属导线。所述柔性导线在所述弯折区前后源极及漏极走线的上方，二者通过相互接触实现导通。
图7为根据本发明另一较佳实施例的制作显示面板的扇出走线结构的流程图，其中所述显示面板的构造已详述于先前实施例，于此不再复述。图7所示制作扇出走线结构的方法包括下列步骤。步骤S21：在显示面板的弯折区均匀涂布一层有机导电材料，用已形成有机导电层。步骤S22：对所述弯折区的有机导电层上方涂布一层光刻胶。步骤S23：对所述弯折区的源极及漏极走线对应位置处的光刻胶进行曝光，曝光后的光刻胶的宽度与源极及漏极走线的宽度相同，而光刻胶层的厚度即为凹槽深度，其用以形成所述弯折区的源极及漏极走线。步骤S24：随后对所述弯折区未曝光的区域的光刻胶和有机导电层进行剥离，只剩下对应源极及漏极走线区域的有机导电材料和曝光后的光刻胶。步骤S25：对曝光的光刻胶进行显影剥离，用以形成基于所述有机导电材料的柔性导线。所述源极及漏极走线的其他部分则形成金属材料所制的金属导线。所述柔性导线在所述弯折区前后的源极及漏极走线的上方，二者通过相互接触实现导通。
综上所述，虽然本发明已以优选实施例揭露如上，但上述优选实施例并非用以限制本发明，本领域的普通技术人员，在不脱离本发明的精神和范围内，均可作各种更动与润饰，因此本发明的保护范围以权利要求界定的范围为准。

Claims (14)

  1. 一种显示面板的扇出走线结构，用以电性连接驱动电路的信号传送接口及所述显示面板的显示区的信号接收接口，其特征在于，所述扇出走线结构包含第一走线层及位于所述第一走线层上方的第二走线层，且所述第一走线层及所述第二走线层分别定义有连接于所述显示区的延伸区、连接于所述信号传送接口的连接区，及位于所述延伸区及所述连接区之间的弯折区，及
    基材层及设于所述基材层上的填料孔，其中所述延伸区的部分、连接区的部分及所述弯折区分别位于所述填料孔的正上方，
    其中所述第一走线层的延伸区及连接区分别包括数条金属导线，所述第一走线层的弯折区包括数条柔性导线，所述每一柔性导线为有机导电材料所制，且所述柔性导线的相对二端分别连接位于所述填料孔上的所述延伸区及所述连接区相应的金属导线，并分别具有一接触部，其向上弯折并朝所述相应的金属导线延伸，用以增加所述柔性导线和所述相应的金属导线的接触范围。
  2. 如权利要求1的显示面板的扇出走线结构，其特征在于，所述第二走线层包括至少一导线，其包括主干部及分支部，其中所述主干部由所述延伸区通过所述弯折区并延伸至所述连接区，而所述分支部横向延伸设置于所述延伸区，且所述分支部远离所述主干部的一端更通过所述弯折区而朝向所述连接区的方向延伸，其中所述主干部及分支部位于所述弯折区的部分为有机导电材料所制的柔性导线，所述主干部及所述分支部位于所述延伸区及连接区的部分为金属材料所制的金属导线。
  3. 如权利要求1的显示面板的扇出走线结构，其特征在于，所述第二走线层包括至少一导线，其为金属材料所制，并包括主干部及分支部，其中所述主干部由所述延伸区通过所述弯折区并延伸至所述连接区，而所述分支部横向延伸设置于所述延伸区，且所述分支部远离所述主干部的一端更通过所述弯折区而朝向所述连接区的方向延伸。
  4. 如权利要求1的显示面板的扇出走线结构，其特征在于，所述有机导电材料为自身导电的有机材料，包括小分子，大分子及高分子材料。
  5. 一种显示面板的扇出走线结构，用以电性连接驱动电路的信号传送接口及所述显示面板的显示区的信号接收接口，其特征在于，所述扇出走线结构包含第一走线层及位于所述第一走线层上方的第二走线层，且所述第一走线层及所述第二走线层分别定义有连接于所述显示区的延伸区、连接于所述信号传送接口的连接区，及位于所述延伸区及所述连接区之间的弯折区，
    其中所述第一走线层的延伸区及连接区分别包括数条金属导线，所述第一走线层的弯折区包括数条柔性导线，所述每一柔性导线为有机导电材料所制，且所述柔性导线的相对二端分别连接位于所述延伸区及所述连接区相应的金属导线。
  6. 如权利要求5的显示面板的扇出走线结构，其特征在于，所述第二走线层包括至少一导线，其包括主干部及分支部，其中所述主干部由所述延伸区通过所述弯折区并延伸至所述连接区，而所述分支部横向延伸设置于所述延伸区，且所述分支部远离所述主干部的一端更通过所述弯折区而朝向所述连接区的方向延伸，其中所述主干部及分支部位于所述弯折区的部分为有机导电材料所制的柔性导线，所述主干部及所述分支部位于所述延伸区及连接区的部分为金属材料所制的金属导线。
  7. 如权利要求5的显示面板的扇出走线结构，其特征在于，所述第二走线层包括至少一导线，其为金属材料所制，并包括主干部及分支部，其中所述主干部由所述延伸区通过所述弯折区并延伸至所述连接区，而所述分支部横向延伸设置于所述延伸区，且所述分支部远离所述主干部的一端更通过所述弯折区而朝向所述连接区的方向延伸。
  8. 如权利要求5的显示面板的扇出走线结构，其特征在于，所述柔性导线的相对二端分别具有一接触部，其向上弯折并朝所述相应的金属导线延伸，用以增加所述柔性导线和所述相应的金属导线的接触范围。
  9. 如权利要求5的显示面板的扇出走线结构，其特征在于，更包含基材层及设于所述基材层上的填料孔，其中所述延伸区的部分、连接区的部分及所述弯折区分别位于所述填料孔的正上方，且所述第一走线层的柔性导线及金属导线于所述填料孔上接触而电性连接。
  10. 如权利要求9的显示面板的扇出走线结构，其特征在于，所述填料孔的一侧与所述第一走线层及所述基材层之间设有第一介电层，而所述第一走线层及所述第二走线层之间设有第二介电层。
  11. 如权利要求10的显示面板的扇出走线结构，其特征在于，所述填料孔的另一侧与所述第一走线层之间设有功能层及设于所述功能层上的第一介电层，其中所述功能层包括设于所述基材层上的屏障层、设于所述屏障层上的缓冲层，及设于所述缓冲层上的栅极绝缘层。
  12. 如权利要求5的显示面板的扇出走线结构，其特征在于，所述有机导电材料为自身导电的有机材料，包括小分子，大分子及高分子材料。
  13. 如权利要求5的显示面板的扇出走线结构，其特征在于，所述有机导电材料为导电粒子掺杂的有机材料，其中所述导电粒子包括金属纳米及微米粒子、石墨烯、碳纳米管等微纳导电材料。
  14. 一种显示面板，包括扇出走线结构，其特征在于，所述扇出走线结构采用权利要求5所述的扇出走线结构。
PCT/CN2019/076108 2018-12-14 2019-02-26 显示面板的扇出走线结构及显示面板 Ceased WO2020118906A1 (zh)

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