WO2023103086A1 - 柔性显示面板 - Google Patents

柔性显示面板 Download PDF

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Publication number
WO2023103086A1
WO2023103086A1 PCT/CN2021/140218 CN2021140218W WO2023103086A1 WO 2023103086 A1 WO2023103086 A1 WO 2023103086A1 CN 2021140218 W CN2021140218 W CN 2021140218W WO 2023103086 A1 WO2023103086 A1 WO 2023103086A1
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WO
WIPO (PCT)
Prior art keywords
wire
flexible display
display panel
segment
panel according
Prior art date
Application number
PCT/CN2021/140218
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English (en)
French (fr)
Inventor
曹蔚然
曾维静
韩佰祥
Original Assignee
深圳市华星光电半导体显示技术有限公司
Priority date (The priority date is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the date listed.)
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Publication date
Application filed by 深圳市华星光电半导体显示技术有限公司 filed Critical 深圳市华星光电半导体显示技术有限公司
Priority to JP2021577703A priority Critical patent/JP2024502216A/ja
Priority to US17/623,373 priority patent/US20230189597A1/en
Publication of WO2023103086A1 publication Critical patent/WO2023103086A1/zh

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Classifications

    • 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
    • H10K59/1315—Interconnections, e.g. wiring lines or terminals comprising structures specially adapted for lowering the resistance
    • 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
    • H10K59/124—Insulating layers formed between TFT elements and OLED elements
    • 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
    • Y02E—REDUCTION OF GREENHOUSE GAS [GHG] EMISSIONS, RELATED TO ENERGY GENERATION, TRANSMISSION OR DISTRIBUTION
    • Y02E10/00—Energy generation through renewable energy sources
    • Y02E10/50—Photovoltaic [PV] energy
    • Y02E10/549—Organic PV cells

Definitions

  • the present application relates to the field of display technology, in particular to a flexible display panel.
  • flexible displays As a new generation of display products, flexible displays have attracted more and more attention because of their advantages such as ultra-light, ultra-thin, high-definition, fast response, bendable, and easy to carry.
  • Flexible displays need to be rolled up or bent, or even bent frequently, during use.
  • the bending area of the flexible display In the narrow frame/frameless flexible display technology, the bending area of the flexible display is usually covered with a lot of metal traces. After the product is bent, the metal traces in the bending area are under greater stress. Since the stress of the metal traces cannot be released in time, it is easy to The occurrence of stress concentration leads to cracks or even breakage of the metal wiring, which leads to an increase in the resistance of the metal wiring or failure of the product display, which seriously affects the service life of the flexible display.
  • the embodiment of the present application provides a flexible display panel to solve the problem that when the flexible display panel in the prior art is bent, the metal traces are easily deformed, cracked or have other structural changes due to the bending stress, which further leads to the reliable carrying capacity of the metal traces.
  • an embodiment of the present application provides a flexible display panel, including:
  • At least one first wire in the shape of a continuous line, is arranged on the bending area of the base substrate;
  • At least one second wire in the shape of a broken wire, corresponding to the first wire, is arranged on the first wire, wherein the second wire includes a plurality of wire segments, and the plurality of wire segments are spaced apart from each other, and the electrical connecting the corresponding first wires;
  • the rigidity of the first wire is smaller than that of the wire segment, and the conductivity of the wire segment is greater than that of the first wire.
  • the flexible display panel further includes an interlayer dielectric layer disposed on the base substrate and covering the first wires, and a plurality of interlayer dielectric layers are formed through the interlayer dielectric layer. Via holes respectively corresponding to the wire segments; and the second wire is disposed on the interlayer dielectric layer, and each wire segment is disposed on the interlayer dielectric layer, and passes through the corresponding via The holes are electrically connected to corresponding said first wires.
  • each wire segment is electrically connected to the corresponding first wire through two of the via holes.
  • the second wire is directly disposed on the first wire, and the plurality of wire segments are directly disposed on the corresponding first wire.
  • the thickness of the wire segment is greater than or equal to the thickness of the first wire.
  • the width of the wire segment is smaller than or equal to the width of the first wire.
  • the shape of the first wire is straight or meandering; and the shape of the wire segment is straight or meandering.
  • a plurality of through holes are formed through the first wire.
  • an embodiment of the present application provides a flexible display panel, including:
  • At least one first wire in the shape of a continuous line, is arranged on the bending area of the base substrate;
  • an interlayer dielectric layer disposed on the base substrate and covering the at least one first wire
  • At least one second wire in the shape of a broken wire, corresponding to the first wire, is arranged on the first wire, wherein the second wire includes a plurality of wire segments, and the plurality of wire segments are spaced apart from each other, and are arranged on on the interlayer dielectric layer, and electrically connected to the corresponding first wire; and
  • a passivation layer disposed on the interlayer dielectric layer and covering the first wire and the second wire;
  • the rigidity of the first wire is smaller than that of the wire segment, and the conductivity of the wire segment is greater than that of the first wire;
  • the thickness of the wire segment is greater than or equal to the thickness of the first wire
  • the width of the wire segment is smaller than or equal to the width of the first wire.
  • the material of the first wire is selected from indium gallium zinc oxide, indium tin oxide, silver-containing conductive glue and mixtures thereof; and the material of the second wire is selected from copper, silver, aluminum and its mixture.
  • the vertical section of the wire segment of the second wire is rectangular or trapezoidal.
  • the vertical section of the via hole is a rectangle or an inverted trapezoid.
  • an embodiment of the present application provides a flexible display panel, including:
  • At least one first wire in the shape of a continuous line, is arranged on the bending area of the base substrate;
  • At least one second wire in the shape of a broken wire, corresponding to the first wire, is arranged on the first wire, wherein the second wire includes a plurality of wire segments, and the plurality of wire segments are spaced apart from each other, and the electrical connecting the corresponding first wires;
  • the rigidity of the first wire is smaller than that of the wire segment, and the conductivity of the wire segment is greater than that of the first wire;
  • the thickness of the wire segment is greater than or equal to the thickness of the first wire
  • the width of the wire segment is smaller than or equal to the width of the first wire.
  • the flexible display panel further includes an interlayer dielectric layer disposed on the base substrate and covering the first wires, and a plurality of interlayer dielectric layers are formed through the interlayer dielectric layer. respectively corresponding to the via holes of the wire segments;
  • the second wire is disposed on the interlayer dielectric layer, and each wire segment is electrically connected to the corresponding first wire through the corresponding via hole.
  • each wire segment is electrically connected to the corresponding first wire through two of the via holes.
  • the second wire is directly disposed on the first wire, and the plurality of wire segments are directly disposed on the corresponding first wire.
  • the shape of the first wire is straight or meandering
  • the shape of the wire segment is straight or meandering.
  • a plurality of through holes are formed through the first wire.
  • the vertical section of the wire segment of the second wire is rectangular or trapezoidal.
  • the vertical section of the via hole is a rectangle or an inverted trapezoid.
  • an embodiment of the present application provides a flexible display panel, including:
  • At least one first wire in the shape of a continuous line, is arranged on the bending area of the base substrate;
  • At least one second wire in the shape of a broken wire, corresponding to the first wire, is arranged on the first wire, wherein the second wire includes a plurality of wire segments, and the plurality of wire segments are spaced apart from each other, and the electrical connecting the corresponding first wires;
  • the rigidity of the first wire is smaller than that of the wire segment, and the conductivity of the wire segment is greater than that of the first wire;
  • a plurality of through holes are formed through the first wire.
  • the width of the wire segment is smaller than or equal to the width of the first wire.
  • the vertical section of the wire segment of the second wire is rectangular or trapezoidal.
  • the flexible display panel of the embodiment of the present application is provided with first wires and second wires electrically connected to each other, wherein the first wires are continuous wires and have less rigidity (Stiffness, which is Flexibility on the contrary, rigid guidance in this paper)
  • the degree of resistance to bending is generally expressed as: P/ ⁇ , where P represents the applied force, and ⁇ represents the amount of deformation
  • the second wire is broken, Contains multiple spaced apart wire segments.
  • the rigidity of the first wire is smaller than that of the wire segment, and the conductivity of the wire segment is greater than that of the first wire, so that the flexible display panel has both low rigidity and high conductivity, and can pass through the wire when it is bent.
  • the high flexibility of the first wire prevents the wire from being broken and damaged, and the high conductivity of the second wire maintains good transmission of electronic signals on the flexible display panel. Therefore, the present application solves the problem that when the flexible display panel in the prior art is bent, the metal wiring is subjected to bending stress, which easily causes deformation, cracking or other structural changes of the metal wiring, which further leads to a decline in the reliable signal-carrying function of the metal wiring. Or a technical problem with a malfunction.
  • This application improves the problem that the stress of the metal traces in the bending area of the flexible display cannot be released in time, and it is easy to cause stress concentration to cause cracks or even breakage of the metal traces, and achieves the goal of avoiding the increase in the resistance of the metal traces or Product display failure and increased lifespan of flexible displays.
  • Fig. 1 is a side sectional view of a flexible display panel provided by the first embodiment of the present application
  • Fig. 2 is a top view of the flexible display panel provided by the first embodiment of the present application, in which the interlayer dielectric layer and the passivation layer are omitted;
  • Fig. 3 is a top view of the flexible display panel provided by the second embodiment of the present application, in which the interlayer dielectric layer and the passivation layer are omitted;
  • Fig. 4 is a top view of the flexible display panel provided by the third embodiment of the present application, in which the interlayer dielectric layer and the passivation layer are omitted;
  • Fig. 5 is a side sectional view of the flexible display panel provided by the fourth embodiment of the present application.
  • Fig. 6 is a side sectional view of the flexible display panel provided by the fifth embodiment of the present application.
  • Fig. 7 is a top view of the flexible display panel provided by the fifth embodiment of the present application, in which the interlayer dielectric layer and the passivation layer are omitted;
  • Fig. 8 is a side sectional view of the flexible display panel provided by the sixth embodiment of the present application.
  • FIG. 9 is a top view of the flexible display panel provided by the sixth embodiment of the present application, where the passivation layer is omitted.
  • the embodiment of the present application provides a flexible display panel 1 , which will be described in detail below. It should be noted that the description sequence of the following embodiments is not intended to limit the preferred sequence of the embodiments.
  • the embodiment of the present application provides a flexible display panel 1 to solve the problem that when the flexible display panel 1 in the prior art is bent, the metal wiring is subjected to bending stress, which easily causes deformation, cracking or other structural changes of the metal wiring, which further leads to The function of metal traces to reliably carry signals is degraded or a technical problem of failure.
  • the flexible display panel 1 of the embodiment of the present application can be used as a circuit board structure in a bending area between two components in a general electronic device, or the flexible display panel 1 can be used as a bending area in a flexible display panel
  • the bendable substrate in it is used for setting light-emitting elements such as organic light-emitting diodes and pixel circuits.
  • the embodiment of the present application provides a flexible display panel 1 , including: a base substrate 10 , at least one first wire 20 , at least one second wire 40 , and a passivation layer 50 .
  • the material of the base substrate 10 may be polyimide (Polyimide, PI).
  • the at least one first wire 20 is formed by patterning the first metal layer M1 disposed on the base substrate, is in a continuous line shape, and is disposed on the bending area of the base substrate 10 .
  • the thickness of the first wire 20 can be equal to or less than 200nm, and when the material of the first wire 20 is Indium Gallium Zinc Oxide (Indium Gallium Zinc Oxide, IGZO), its thickness can be further reduced to be equal to or less than 30nm , to reduce the rigidity of the first lead 20 (Stiffness, which is Flexibility on the contrary, in this paper, when the rigid guide wire is bent without causing permanent irreversible deformation, the degree of resistance to bending is generally expressed as: P / ⁇ , where P represents the applied force, and ⁇ represents the amount of deformation) to improve its bending performance.
  • the material of the first wire 20 is indium tin oxide (Indium Tin Oxide, ITO)
  • its thickness can be further reduced to be equal to or less than 20nm, so as to
  • the at least one second wire 40 is formed by patterning the second metal layer M2 located above the first metal layer M1, and is in the shape of a broken line, corresponding to the first wire 20, and arranged on the first metal layer M1.
  • each of the second wires 40 includes a plurality of wire segments 41 , and the plurality of wire segments 41 are spaced apart from each other and are electrically connected to the corresponding first wires 20 .
  • the passivation layer 50 covers the first wire 20 and the second wire 40 .
  • the rigidity of the first wire 20 is smaller than that of the wire segment 41 , and the conductivity of the wire segment 41 is greater than that of the first wire 20 .
  • the flexible display panel 1 further includes an interlayer dielectric layer 30 disposed on the base substrate 10 and covering the first wires 20 , A plurality of via holes 31 respectively corresponding to the wire segments 41 are penetratingly formed on the interlayer dielectric layer 30; and the second wire 40 is disposed on the interlayer dielectric layer 30, and each of the wires
  • the line segment 41 is disposed on the interlayer dielectric layer 30 and is electrically connected to the corresponding first wire 20 through the corresponding via hole 31 .
  • the material of the interlayer dielectric layer 30 may be an organic material or an inorganic material.
  • each wire segment 41 is electrically connected to the corresponding first wire 20 through two of the via holes 31 .
  • the shape of the first wire 20 is straight or meandering; and the shape of the wire segment 41 is straight or meandering.
  • the shape of the first wire 20a of the flexible display panel 1a is meandering, and the shape of the wire segment 41a is straight.
  • the shape of the first wire 20b of the flexible display panel 1b is meandering; and the shape of the wire segment 41b is meandering.
  • the second wire 40 of the flexible display panel 1c is directly arranged on the first wire 20, and the plurality of wire segments 41 are directly arranged on the corresponding on the first wire 20.
  • the thickness of the wire segment 41 is greater than or equal to the thickness of the first wire 20 .
  • the conductivity of the second wire 40 can be further improved.
  • the width of the wire segment 41 is less than or equal to the width of the first wire 20 .
  • the flexible display panel 1d of the fifth embodiment of the present application is substantially the same as the flexible display panel 1 of the first embodiment, but the difference of the fifth embodiment is that the first wire 20 runs through A plurality of through holes 200 are formed.
  • the configuration of the through hole 200 can further make the first wire 20 more flexible and reduce its rigidity so as to improve its bending performance.
  • the flexible display panel 1e of the sixth embodiment of the present application is substantially the same as the flexible display panel 1 of the fourth embodiment, but the difference of the sixth embodiment is that the first wire 20 runs through A plurality of through holes 200 are formed.
  • the configuration of the through hole 200 can further make the first wire 20 more flexible and reduce its rigidity so as to improve its bending performance.
  • the embodiment of the present application provides a flexible display panel 1, including: a base substrate 10, at least one first wire 20, an interlayer dielectric layer 30, and at least one second wire 40, and a passivation layer 50.
  • the material of the base substrate 10 may be polyimide (Polyimide, PI).
  • the at least one first wire 20 is formed by patterning the first metal layer M1 disposed on the base substrate, is in a continuous line shape, and is disposed on the bending area of the base substrate 10 .
  • the thickness of the first wire 20 can be equal to or less than 200nm, and when the material of the first wire 20 is Indium Gallium Zinc Oxide (Indium Gallium Zinc Oxide, IGZO), its thickness can be further reduced to be equal to or less than 30nm , so as to reduce the rigidity of the first wire 20 so as to improve its bending performance.
  • the material of the first wire 20 is indium tin oxide (Indium Tin Oxide, ITO)
  • its thickness can be further reduced to be equal to or less than 20nm, so as to reduce the rigidity of the first wire 20 and improve its bending performance.
  • the interlayer dielectric layer 30 is disposed on the base substrate 10 and covers the at least one first wire 20 .
  • the material of the interlayer dielectric layer 30 may be an organic material or an inorganic material.
  • the at least one second wire 40 is formed by patterning the second metal layer M2 disposed on the interlayer dielectric layer 30, and is in the shape of a broken line, corresponding to the first wire 20, disposed on the second metal layer M2. On a wire 20, wherein each of the second wires 40 includes a plurality of wire segments 41, the plurality of wire segments 41 are spaced from each other, arranged on the interlayer dielectric layer 30, and electrically connected to the corresponding first Wire 20.
  • the passivation layer 50 is disposed on the interlayer dielectric layer 30 and covers the first wire 20 and the second wire 40;
  • the rigidity of the first wire 20 is smaller than that of the wire segment 41 , and the conductivity of the wire segment 41 is greater than that of the first wire 20 .
  • the thickness of the wire segment 41 is greater than or equal to the thickness of the first wire 20 ; wherein, the width of the wire segment 41 is smaller than or equal to the width of the first wire 20 .
  • the conductivity of the second wire 40 can be further improved.
  • the rigidity of the flexible display panel 1 can be further reduced so as to improve its bending performance.
  • the material of the first wire 20 is selected from indium gallium zinc oxide (Indium Gallium Zinc Oxide, IGZO), indium tin oxide (Indium Tin Oxide, ITO), silver-containing conductive glue and mixtures thereof; and the material of the second wire 40 is selected from copper, silver, aluminum and mixtures thereof.
  • indium gallium zinc oxide Indium Gallium Zinc Oxide, IGZO
  • indium tin oxide Indium Tin Oxide, ITO
  • silver-containing conductive glue silver-containing conductive glue and mixtures thereof
  • the material of the second wire 40 is selected from copper, silver, aluminum and mixtures thereof.
  • the vertical section of the wire segment 41 of the second wire 40 is rectangular or trapezoidal, so as to improve the bending performance and lifespan of the flexible display panel 1 .
  • the vertical section of the via hole 31 is a rectangle or an inverted trapezoid, so as to improve the bending performance and lifespan of the flexible display panel 1 .
  • the flexible display panels 1, 1a, 1b, 1c, 1d, and 1e of the embodiment of the present application are provided with a first wire 20 and a second wire 40 electrically connected to each other, wherein the first wire 20 is continuous and has a small Rigid, and the second wire 40 is broken wire, including a plurality of wire segments 41 spaced apart.
  • the rigidity of the first wire 20 is smaller than that of the wire segment 41, and the conductivity of the wire segment 41 is greater than that of the first wire 20, so that the flexible display panel 1 has both low rigidity and high conductivity, and can When bending, the high flexibility of the first wire 20 prevents the wire from being broken and damaged, and the high conductivity of the second wire 40 maintains the electrons on the flexible display panel 1, 1a, 1b, 1c, 1d, 1e. Good transmission of signal. Therefore, this application solves the problem that when the flexible display panels 1, 1a, 1b, 1c, 1d, and 1e in the prior art are bent, the metal traces are subjected to bending stress, which easily causes deformation, cracking or other structural changes of the metal traces.
  • This application improves the problem that the stress of the metal traces in the bending area of the flexible display cannot be released in time, and it is easy to cause stress concentration to cause cracks or even breakage of the metal traces, and achieves the goal of avoiding the increase in the resistance of the metal traces or Product display failure and increased lifespan of flexible displays.

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  • Microelectronics & Electronic Packaging (AREA)
  • Devices For Indicating Variable Information By Combining Individual Elements (AREA)

Abstract

一种柔性显示面板（1），包括：衬底基板（10）；至少一第一导线（20），呈连续线状，设置在衬底基板（10）上；至少一第二导线（40），呈断线状，对应第一导线（20），设置在第一导线（20）上，其中各第二导线（40）包括多个导线线段（41），多个导线线段（41）相互间隔，且电连接对应的第一导线（20）。第一导线（20）的刚性小于导线线段（41），且导线线段（41）的导电性大于第一导线（20）。第一导线（20）与第二导线（40）的配置使得柔性显示面板（1）兼具低刚性与导电性。

Description

柔性显示面板 技术领域
本申请涉及显示技术领域，具体涉及一种柔性显示面板。
 背景技术
柔性显示器作为新一代的显示产品，由于其具有超轻、超薄、清晰度高、响应快、可弯曲、携带方便等优点，受到人们越来越多的广泛关注。柔性显示器在使用时需要卷起或者弯曲，甚至频繁弯折。窄边框/无边框柔性显示技术中，柔性显示器的弯折区域通常布有很多金属走线，产品弯折后，弯折区域金属走线受到较大应力，由于金属走线应力无法及时释放，易产生应力集中导致金属走线发生裂纹(crack)甚至断裂现象，导致金属走线阻值增大或产品显示失效，严重影响柔性显示器的使用寿命。
 技术问题
本申请实施例提供一种柔性显示面板，以解决现有技术的柔性显示面板在弯曲时，金属走线承受弯曲应力而容易造成变形、破裂或其他结构上的变化，进一步导致金属走线可靠承载信号的功能下降或是故障的技术问题。
 技术解决方案
在一方面，本申请实施例提供一种柔性显示面板，包括：
衬底基板；
至少一第一导线，呈连续线状，设置在所述衬底基板的弯折区上；
至少一第二导线，呈断线状，对应所述第一导线，设置在所述第一导线上，其中所述第二导线包括多个导线线段，所述多个导线线段相互间隔，且电连接对应的所述第一导线；以及
钝化层，覆盖所述第一导线及所述第二导线；
其中，所述第一导线的刚性小于所述导线线段，且所述导线线段的导电性大于所述第一导线。
在本申请一些实施例中，所述柔性显示面板还包括一设置在所述衬底基板上并且覆盖所述第一导线的层间介质层，在所述层间介质层上贯穿形成有多个分别对应各所述导线线段的过孔；以及所述第二导线设置在所述层间介质层上，且各所述导线线段设置在所述层间介质层上，且通过对应的所述过孔电连接到对应的所述第一导线。
在本申请一些实施例中，各所述导线线段通过其中二个所述过孔而电连接到对应的所述第一导线上。
在本申请一些实施例中，所述第二导线直接设置在所述第一导线上，且所述多个导线线段直接设置在对应的所述第一导线上。
在本申请一些实施例中，所述导线线段的厚度大于或等于所述第一导线的厚度。
在本申请一些实施例中，所述导线线段的宽度小于或等于所述第一导线的宽度。
在本申请一些实施例中，所述第一导线的形状为直线状或是蜿蜒状；以及所述导线线段的形状为直线或蜿蜒状。
在本申请一些实施例中，所述第一导线上贯穿形成有多个贯穿孔。
在另一方面，本申请实施例提供一种柔性显示面板，包括：
衬底基板；
至少一第一导线，呈连续线状，设置在所述衬底基板的弯折区上；
层间介质层，设置在所述衬底基板上并且覆盖所述至少一第一导线；
至少一第二导线，呈断线状，对应所述第一导线，设置在所述第一导线上，其中所述第二导线包括多个导线线段，所述多个导线线段相互间隔，设置在所述层间介质层上，且电连接对应的所述第一导线；以及
钝化层，设置在所述层间介质层上，且覆盖所述第一导线及所述第二导线；
其中，所述第一导线的刚性小于所述导线线段，且所述导线线段的导电性大于所述第一导线；
其中，所述导线线段的厚度大于或等于所述第一导线的厚度；
其中，所述导线线段的宽度小于或等于所述第一导线的宽度。
在本申请一些实施例中，所述第一导线的材料选自氧化铟镓锌、氧化铟锡、含银导电胶及其混合物；以及所述第二导线的材料选自铜、银、铝及其混合物。
在本申请一些实施例中，所述第二导线的所述导线线段的垂直截面为矩形或梯形。
在本申请一些实施例中，所述过孔的垂直截面为矩形或倒梯形。
在另一方面，本申请实施例提供一种柔性显示面板，包括：
衬底基板；
至少一第一导线，呈连续线状，设置在所述衬底基板的弯折区上；
至少一第二导线，呈断线状，对应所述第一导线，设置在所述第一导线上，其中所述第二导线包括多个导线线段，所述多个导线线段相互间隔，且电连接对应的所述第一导线；以及
钝化层，覆盖所述第一导线及所述第二导线；
其中，所述第一导线的刚性小于所述导线线段，且所述导线线段的导电性大于所述第一导线；
其中，所述导线线段的厚度大于或等于所述第一导线的厚度；
其中，所述导线线段的宽度小于或等于所述第一导线的宽度。
在本申请一些实施例中，所述柔性显示面板还包括一设置在所述衬底基板上并且覆盖所述第一导线的层间介质层，在所述层间介质层上贯穿形成有多个分别对应各所述导线线段的过孔；
所述第二导线设置在所述层间介质层上，且各所述导线线段通过对应的所述过孔电连接到对应的所述第一导线。
在本申请一些实施例中，各所述导线线段通过其中二个所述过孔而电连接到对应的所述第一导线上。
在本申请一些实施例中，所述第二导线直接设置在所述第一导线上，且所述多个导线线段直接设置在对应的所述第一导线上。
在本申请一些实施例中，所述第一导线的形状为直线状或是蜿蜒状；以及
所述导线线段的形状为直线或蜿蜒状。
在本申请一些实施例中，所述第一导线上贯穿形成有多个贯穿孔。
在本申请一些实施例中，所述第二导线的所述导线线段的垂直截面为矩形或梯形。
在本申请一些实施例中，所述过孔的垂直截面为矩形或倒梯形。
在另一方面，本申请实施例提供一种柔性显示面板，包括：
衬底基板；
至少一第一导线，呈连续线状，设置在所述衬底基板的弯折区上；
至少一第二导线，呈断线状，对应所述第一导线，设置在所述第一导线上，其中所述第二导线包括多个导线线段，所述多个导线线段相互间隔，且电连接对应的所述第一导线；以及
钝化层，覆盖所述第一导线及所述第二导线；
其中，所述第一导线的刚性小于所述导线线段，且所述导线线段的导电性大于所述第一导线；
其中，所述第一导线上贯穿形成有多个贯穿孔。
其中，所述导线线段的宽度小于或等于所述第一导线的宽度。
在本申请一些实施例中，所述第二导线的所述导线线段的垂直截面为矩形或梯形。
 有益效果
本申请包括至少下列优点：
本申请实施例的柔性显示面板，设置了相互电连接的第一导线以及第二导线，其中第一导线为连续线状而具有较小的刚性(Stiffness，其相反为Flexibility，于本文中刚性指导线弯曲而不造成永久不可恢复的变形的情况下，抵抗弯曲的程度，一般将刚性表示为：P/δ，其中P 表示施力，δ表示变形量)，而第二导线为断线状，包括了多个相间隔的导线线段。所述第一导线的刚性小于所述导线线段，且所述导线线段的导电性大于所述第一导线，使得所述柔性显示面板同时兼具低刚性以及高导电性，能够在弯曲时通过所述第一导线的高挠性避免导线破裂损毁，且通过所述第二导线的高导电性维持所述柔性显示面板上电子信号的良好传输。因此，本申请解决了现有技术的柔性显示面板在弯曲时，金属走线承受弯曲应力而容易造成金属走线变形、破裂或其他结构上的变化，进一步导致金属走线可靠承载信号的功能下降或是故障的技术问题。本申请改善了柔性显示器的弯折区中金属走线应力无法及时释放，易产生应力集中导致金属走线发生裂纹(crack)甚至断裂现象的问题，并达到了避免金属走线阻值增大或产品显示失效，并提升了柔性显示器的使用寿命。
 附图说明
为了更清楚地说明本申请实施例中的技术方案，下面将对实施例描述中所需要使用的附图作简单地介绍，显而易见地，下面描述中的附图仅仅是本申请的一些实施例，对于本领域技术人员来讲，在不付出创造性劳动的前提下，还可以根据这些附图获得其他的附图。
图1是本申请第1实施例提供的柔性显示面板的侧面剖视图；
图2是本申请第1实施例提供的柔性显示面板的俯视图，其中层间介质层及钝化层省略；
图3是本申请第2实施例提供的柔性显示面板的俯视图，其中层间介质层及钝化层省略；
图4是本申请第3实施例提供的柔性显示面板的俯视图，其中层间介质层及钝化层省略；
图5是本申请第4实施例提供的柔性显示面板的侧面剖视图；
图6是本申请第5实施例提供的柔性显示面板的侧面剖视图；
图7是本申请第5实施例提供的柔性显示面板的俯视图，其中层间介质层及钝化层省略；
图8是本申请第6实施例提供的柔性显示面板的侧面剖视图；以及
图9是本申请第6实施例提供的柔性显示面板的俯视图，其中钝化层省略。
 本发明的实施方式
面将结合本申请实施例中的附图，对本申请实施例中的技术方案进行清楚、完整地描述，显然，所描述的实施例仅仅是本申请一部分实施例，而不是全部的实施例。基于本申请中的实施例，本领域技术人员在没有作出创造性劳动前提下所获得的所有其他实施例，都属于本申请保护的范围。此外，应当理解的是，此处所描述的具体实施方式仅用于说明和解释本申请，幷不用于限制本申请。
本申请实施例提供一种柔性显示面板1，以下分别进行详细说明。需说明的是，以下实施例的描述顺序不作为对实施例优选顺序的限定。
本申请实施例提供一种柔性显示面板1，以解决现有技术的柔性显示面板1在弯曲时，金属走线承受弯曲应力而容易造成金属走线变形、破裂或其他结构上的变化，进一步导致金属走线可靠承载信号的功能下降或是故障的技术问题。本申请实施例的柔性显示面板1，可做为一般电子装置中两个零组件之间弯折区的电路板结构，或者，所述柔性显示面板1可做为柔性显示面板中的弯折区中的可弯折基板，以供设置诸如有机发光二极管等发光元件及像素电路。
请参照图1至图5，本申请实施例提供一种柔性显示面板1，包括：衬底基板10、至少一第一导线20、至少一第二导线40、以及钝化层50。
所述衬底基板10的材料可为聚酰亚胺(Polyimide, PI)。
所述至少一第一导线20由对设置在所述衬底基板上的第一金属层M1进行图形化而形成，呈连续线状，且设置在所述衬底基板10的弯折区上。此外，所述第一导线20的厚度可等于或小于200nm，当所述第一导线20的材料为氧化铟镓锌 (Indium Gallium Zinc Oxide, IGZO)时，其厚度可进一步减少到等于或小于30nm，以降低所述第一导线20的刚性(Stiffness，其相反为Flexibility，于本文中刚性指导线弯曲而不造成永久不可恢复的变形的情况下，抵抗弯曲的程度，一般将刚性表示为：P/δ，其中P 表示施力，δ表示变形量)从而提高其弯曲性能。当所述第一导线20的材料为氧化铟锡 (Indium Tin Oxide, ITO)时，其厚度可进一步减少到等于或小于20nm，以降低所述第一导线20的刚性从而提高其弯曲性能。
所述至少一第二导线40由对位于所述第一金属层M1上方的第二金属层M2进行图形化而形成，呈断线状，对应所述第一导线20，设置在所述第一导线20上，其中各所述第二导线40包括多个导线线段41，所述多个导线线段41相互间隔，且电连接对应的所述第一导线20。
所述钝化层50覆盖所述第一导线20及所述第二导线40。
其中，所述第一导线20的刚性小于所述导线线段41，且所述导线线段41的导电性大于所述第一导线20。
请参照图1及图2，在本申请第1实施例中，所述柔性显示面板1还包括一设置在所述衬底基板10上并且覆盖所述第一导线20的层间介质层30，在所述层间介质层30上贯穿形成有多个分别对应各所述导线线段41的过孔31；以及所述第二导线40设置在所述层间介质层30上，且各所述导线线段41设置在所述层间介质层30上，且通过对应的所述过孔31电连接到对应的所述第一导线20。此外，所述层间介质层30的材料可为有机材料或无机材料。
在本申请第1实施例中，各所述导线线段41通过其中二个所述过孔31而电连接到对应的所述第一导线20上。
在本申请一些实施例中，所述第一导线20的形状为直线状或是蜿蜒状；以及所述导线线段41的形状为直线或蜿蜒状。
请参照图3，在本申请第2实施例中，所述柔性显示面板1a的所述第一导线20a的形状为蜿蜒状，所述导线线段41a的形状为直线状。
请参照图4，在本申请第2实施例中，所述柔性显示面板1b的所述第一导线20b的形状为蜿蜒状；以及所述导线线段41b的形状为蜿蜒状。
请参照图5，在本申请第4实施例中，所述柔性显示面板1c的所述第二导线40直接设置在所述第一导线20上，且所述多个导线线段41直接设置在对应的所述第一导线20上。
在本申请一些实施例中，所述导线线段41的厚度大于或等于所述第一导线20的厚度。通过增加所述第二导线40的厚度，可进一步提高所述第二导线40的导电性。
在本申请一些实施例中，所述导线线段41的宽度小于或等于所述第一导线20的宽度。通过减少所述第二导线40的厚度，可进一步降低所述柔性显示面板1的刚性从而提高其弯曲性能。
请参照图6及图7，本申请第5实施例的柔性显示面板1d与第1实施例的柔性显示面板1大致相同，惟第5实施例的不同处在于，所述第一导线20上贯穿形成有多个贯穿孔200。所述贯穿孔200的配置，可进一步令所述第一导线20更为柔软而降低其刚性从而提高其弯曲性能。
请参照图8及图9，本申请第6实施例的柔性显示面板1e与第4实施例的柔性显示面板1大致相同，惟第6实施例的不同处在于，所述第一导线20上贯穿形成有多个贯穿孔200。所述贯穿孔200的配置，可进一步令所述第一导线20更为柔软而降低其刚性从而提高其弯曲性能。
另一方面，请复参照图1至图4，本申请实施例提供一种柔性显示面板1，包括：衬底基板10、至少一第一导线20、层间介质层30、至少一第二导线40、以及钝化层50。
所述衬底基板10的材料可为聚酰亚胺(Polyimide, PI)。
所述至少一第一导线20由对设置在所述衬底基板上的第一金属层M1进行图形化而形成，呈连续线状，且设置在所述衬底基板10的弯折区上。此外，所述第一导线20的厚度可等于或小于200nm，当所述第一导线20的材料为氧化铟镓锌 (Indium Gallium Zinc Oxide, IGZO)时，其厚度可进一步减少到等于或小于30nm，以降低所述第一导线20的刚性从而提高其弯曲性能。当所述第一导线20的材料为氧化铟锡 (Indium Tin Oxide, ITO)时，其厚度可进一步减少到等于或小于20nm，以降低所述第一导线20的刚性从而提高其弯曲性能。
所述层间介质层30，设置在所述衬底基板10上并且覆盖所述至少一第一导线20。此外，所述层间介质层30的材料可为有机材料或无机材料。
所述至少一第二导线40由对设置在所述层间介质层30上的第二金属层M2进行图形化而形成，呈断线状，对应所述第一导线20，设置在所述第一导线20上，其中各所述第二导线40包括多个导线线段41，所述多个导线线段41相互间隔，设置在所述层间介质层30上，且电连接对应的所述第一导线20。
所述钝化层50，设置在所述层间介质层30上，且覆盖所述第一导线20及所述第二导线40；
其中，所述第一导线20的刚性小于所述导线线段41，且所述导线线段41的导电性大于所述第一导线20。
其中，所述导线线段41的厚度大于或等于所述第一导线20的厚度；其中，所述导线线段41的宽度小于或等于所述第一导线20的宽度。通过增加所述第二导线40的厚度，可进一步提高所述第二导线40的导电性。通过减少所述第二导线40的厚度，可进一步降低所述柔性显示面板1的刚性从而提高其弯曲性能。
在本申请一些实施例中，所述第一导线20的材料选自氧化铟镓锌 (Indium Gallium Zinc Oxide, IGZO)、氧化铟锡 (Indium Tin Oxide, ITO)、含银导电胶及其混合物；以及所述第二导线40的材料选自铜、银、铝及其混合物。
在本申请一些实施例中，根据布线的需要，所述第二导线40的所述导线线段41的垂直截面为矩形或梯形，以提升所述柔性显示面板1的弯曲性能和寿命。
在本申请一些实施例中，根据布线的需要，所述过孔31的垂直截面为矩形或倒梯形，以提升所述柔性显示面板1的弯曲性能和寿命。
本申请包括至少下列优点：
本申请实施例的柔性显示面板1、1a、1b、1c、1d、1e，设置了相互电连接的第一导线20以及第二导线40，其中第一导线20为连续线状而具有较小的刚性，而第二导线40为断线状，包括了多个相间隔的导线线段41。所述第一导线20的刚性小于所述导线线段41，且所述导线线段41的导电性大于所述第一导线20，使得所述柔性显示面板1同时兼具低刚性以及高导电性，能够在弯曲时通过所述第一导线20的高挠性避免导线破裂损毁，且通过所述第二导线40的高导电性维持所述柔性显示面板1、1a、1b、1c、1d、1e上电子信号的良好传输。因此，本申请解决了现有技术的柔性显示面板1、1a、1b、1c、1d、1e在弯曲时，金属走线承受弯曲应力而容易造成金属走线变形、破裂或其他结构上的变化，进一步导致金属走线可靠承载信号的功能下降或是故障的技术问题。本申请改善了柔性显示器的弯折区中金属走线应力无法及时释放，易产生应力集中导致金属走线发生裂纹(crack)甚至断裂现象的问题，并达到了避免金属走线阻值增大或产品显示失效，并提升了柔性显示器的使用寿命。
以上对本申请实施例所提供的柔性显示面板1、1a、1b、1c、1d、1e进行了详细介绍。本文中应用了具体个例对本申请的原理及实施方式进行了阐述，以上实施例的说明只是用于帮助理解本申请的方法及其核心思想；同时，对于本领域的技术人员，依据本申请的思想，在具体实施方式及应用范围上均会有改变之处，综上所述，本说明书内容不应理解为对本申请的限制。

Claims (20)

  1. 一种柔性显示面板，包括：
    衬底基板；
    至少一第一导线，呈连续线状，设置在所述衬底基板的弯折区上；
    至少一第二导线，呈断线状，对应所述第一导线，设置在所述第一导线上，其中所述第二导线包括多个导线线段，所述多个导线线段相互间隔，且电连接对应的所述第一导线；以及
    钝化层，覆盖所述第一导线及所述第二导线；
    其中，所述第一导线的刚性小于所述导线线段，且所述导线线段的导电性大于所述第一导线。
  2. 根据对权利要求1所述的柔性显示面板，其中，所述柔性显示面板还包括一设置在所述衬底基板上并且覆盖所述第一导线的层间介质层，在所述层间介质层上贯穿形成有多个分别对应各所述导线线段的过孔；
    所述第二导线设置在所述层间介质层上，且各所述导线线段通过对应的所述过孔电连接到对应的所述第一导线。
  3. 根据对权利要求2所述的柔性显示面板，其中，各所述导线线段通过其中二个所述过孔而电连接到对应的所述第一导线上。
  4. 根据对权利要求1所述的柔性显示面板，其中，所述第二导线直接设置在所述第一导线上，且所述多个导线线段直接设置在对应的所述第一导线上。
  5. 根据对权利要求1所述的柔性显示面板，其中，所述导线线段的厚度大于或等于所述第一导线的厚度。
  6. 根据对权利要求1所述的柔性显示面板，其中，所述导线线段的宽度小于或等于所述第一导线的宽度。
  7. 根据对权利要求1所述的柔性显示面板，其中，所述第一导线的形状为直线状或是蜿蜒状；以及
    所述导线线段的形状为直线或蜿蜒状。
  8. 根据对权利要求1所述的柔性显示面板，其中，所述第一导线上贯穿形成有多个贯穿孔。
  9. 根据对权利要求1所述的柔性显示面板，其中，所述第二导线的所述导线线段的垂直截面为矩形或梯形。
  10. 根据对权利要求2所述的柔性显示面板，其中，所述过孔的垂直截面为矩形或倒梯形。
  11. 一种柔性显示面板，包括：
    衬底基板；
    至少一第一导线，呈连续线状，设置在所述衬底基板的弯折区上；
    至少一第二导线，呈断线状，对应所述第一导线，设置在所述第一导线上，其中所述第二导线包括多个导线线段，所述多个导线线段相互间隔，且电连接对应的所述第一导线；以及
    钝化层，覆盖所述第一导线及所述第二导线；
    其中，所述第一导线的刚性小于所述导线线段，且所述导线线段的导电性大于所述第一导线；
    其中，所述导线线段的厚度大于或等于所述第一导线的厚度；
    其中，所述导线线段的宽度小于或等于所述第一导线的宽度。
  12. 根据对权利要求11所述的柔性显示面板，其中，所述柔性显示面板还包括一设置在所述衬底基板上并且覆盖所述第一导线的层间介质层，在所述层间介质层上贯穿形成有多个分别对应各所述导线线段的过孔；
    所述第二导线设置在所述层间介质层上，且各所述导线线段通过对应的所述过孔电连接到对应的所述第一导线。
  13. 根据对权利要求12所述的柔性显示面板，其中，各所述导线线段通过其中二个所述过孔而电连接到对应的所述第一导线上。
  14. 根据对权利要求11所述的柔性显示面板，其中，所述第二导线直接设置在所述第一导线上，且所述多个导线线段直接设置在对应的所述第一导线上。
  15. 根据对权利要求11所述的柔性显示面板，其中，所述第一导线的形状为直线状或是蜿蜒状；以及
    所述导线线段的形状为直线或蜿蜒状。
  16. 根据对权利要求11所述的柔性显示面板，其中，所述第一导线上贯穿形成有多个贯穿孔。
  17. 根据对权利要求11所述的柔性显示面板，其中，所述第二导线的所述导线线段的垂直截面为矩形或梯形。
  18. 根据对权利要求12所述的柔性显示面板，其中，所述过孔的垂直截面为矩形或倒梯形。
  19. 一种柔性显示面板，包括：
    衬底基板；
    至少一第一导线，呈连续线状，设置在所述衬底基板的弯折区上；
    至少一第二导线，呈断线状，对应所述第一导线，设置在所述第一导线上，其中所述第二导线包括多个导线线段，所述多个导线线段相互间隔，且电连接对应的所述第一导线；以及
    钝化层，覆盖所述第一导线及所述第二导线；
    其中，所述第一导线的刚性小于所述导线线段，且所述导线线段的导电性大于所述第一导线；
    其中，所述第一导线上贯穿形成有多个贯穿孔。
    其中，所述导线线段的宽度小于或等于所述第一导线的宽度。
  20. 根据对权利要求19所述的柔性显示面板，其中，所述第二导线的所述导线线段的垂直截面为矩形或梯形。
PCT/CN2021/140218 2021-12-09 2021-12-21 柔性显示面板 WO2023103086A1 (zh)

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