WO2020056884A1 - 柔性显示面板、柔性显示装置及柔性显示面板制备方法 - Google Patents

柔性显示面板、柔性显示装置及柔性显示面板制备方法 Download PDF

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Publication number
WO2020056884A1
WO2020056884A1 PCT/CN2018/114437 CN2018114437W WO2020056884A1 WO 2020056884 A1 WO2020056884 A1 WO 2020056884A1 CN 2018114437 W CN2018114437 W CN 2018114437W WO 2020056884 A1 WO2020056884 A1 WO 2020056884A1
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Prior art keywords
metal
flexible display
trace
layer
display panel
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PCT/CN2018/114437
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English (en)
French (fr)
Inventor
秦芳
胡泉
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Wuhan China Star Optoelectronics Semiconductor Display Technology Co Ltd
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Wuhan China Star Optoelectronics Semiconductor Display Technology Co Ltd
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Priority to US16/312,735 priority Critical patent/US10825887B2/en
Publication of WO2020056884A1 publication Critical patent/WO2020056884A1/zh
Anticipated expiration legal-status Critical
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    • 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
    • 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
    • H10K59/1201—Manufacture or treatment

Definitions

  • the present invention relates to the field of display technology, and in particular, to a flexible display panel, a flexible display device, and a method for manufacturing a flexible display panel.
  • Flexible display devices As a new generation of display products, have attracted more and more attention due to their advantages such as ultra-light, ultra-thin, high-definition, fast response, flexible, and easy to carry.
  • Low-size panels With the continuous update of display panel technology, small-size panels are developing in the direction of thinning, narrow bezels, and borderless.
  • Pad bending is the core technology of narrow bezels / borderless. Currently, it can generally be achieved. Bending radius is less than 0.5mm.
  • Flexible displays need to be rolled up or bent during use, or even frequently bent.
  • the bending area of the flexible display usually has a lot of metal wiring. After the product is bent, the metal wiring in the bending area is subject to greater stress. Because the metal wiring stress cannot be released in a timely manner, The occurrence of stress concentration causes cracks or even breaks in the metal traces, resulting in an increase in the resistance of the metal traces or product failure, which seriously affects the service life of the flexible display.
  • the purpose of the present invention is to provide a flexible display panel, a flexible display device and a method for manufacturing a flexible display panel, which can reduce the stress of metal traces, reduce the probability of breakage of metal traces in the bending area of the flexible display, improve reliability, Small trace breaks cause odds of showing anomalies.
  • the present invention provides a flexible display panel including an organic layer.
  • the flexible display panel further includes a first metal layer trace disposed on the organic layer and the first metal layer trace.
  • the method comprises a plurality of first metal blocks separated and arranged at a bending area corresponding to the flexible display panel; a first organic flat layer is disposed on the first metal layer wiring, and the first organic flat layer corresponds to At least one contact hole is provided between two adjacent first metal blocks at the bending area; a second metal layer trace is disposed on the first organic flat layer, and the second metal layer trace is provided.
  • a wavy trace is formed through the contact hole at the corresponding bending area, and is connected to the corresponding first metal block in the contact hole.
  • the present invention also provides a flexible display device, the flexible display device includes a flexible display panel, the flexible display panel includes an organic layer, and the flexible display panel further includes: a first metal layer wiring, Disposed on the organic layer, the first metal layer trace includes a plurality of first metal blocks spaced apart at a bending area corresponding to the flexible display panel; a first organic flat layer is disposed on the first A metal layer trace, at least one contact hole is provided between two adjacent first metal blocks on the first organic flat layer corresponding to the bending area; a second metal layer trace is provided in the On the first organic flat layer, the second metal layer trace forms a wavy trace through the contact hole at the corresponding bending area, and is connected to the corresponding first metal block in the contact hole. .
  • the present invention further provides a method for manufacturing a flexible display panel, including the following steps: providing an organic layer; depositing a first metal layer on the organic layer and patterning the first metal layer pattern,
  • the first metal layer trace includes a plurality of first metal blocks spaced apart at a bending area corresponding to the flexible display panel;
  • a first organic flat layer is formed on the first metal layer, and
  • An organic flat layer is provided with at least one contact hole between two adjacent first metal blocks corresponding to the bending area;
  • a second metal layer is deposited on the first organic flat layer and patterned to form a second metal Layer wiring, the second metal layer wiring forms a wavy wiring through the contact hole at the corresponding bending area, and is connected to the corresponding first metal block in the contact hole.
  • the present invention adopts a double-layer structure through a part of the metal wiring section in the bending area of the flexible display panel, and the second metal layer wiring adopts a wavy wiring design, which can reduce the stress on the metal wiring during the bending process and reduce flexibility. Probability of metal trace breakage in the bend area of the display to ensure stable metal trace resistance; and the connection between the first metal layer trace and the second metal layer trace can improve reliability and reduce traces The chance of breakage will cause abnormal display to ensure normal signal transmission.
  • FIG. 1 is a cross-sectional view of a bent area of a first embodiment of a flexible display panel according to the present invention
  • FIG. 2 is a cross-sectional view of a bent area of a second embodiment of a flexible display panel according to the present invention
  • FIG. 3 is a cross-sectional view of a bent area of a third embodiment of a flexible display panel according to the present invention.
  • FIG. 4 is a cross-sectional view of a bent area of a fourth embodiment of a flexible display panel according to the present invention.
  • FIG. 5 is a flowchart of an embodiment of a method for manufacturing a flexible display panel according to the present invention.
  • 6A-6C are flowcharts of a manufacturing process of an embodiment of a flexible display panel according to the present invention.
  • the "first" or “down” of the second feature may include the first and second features in direct contact, and may also include the first and second features. Not directly, but through another characteristic contact between them.
  • the first feature is “above”, “above”, and “above” the second feature, including that the first feature is directly above and obliquely above the second feature, or merely indicates that the first feature is higher in level than the second feature.
  • the first feature is “below”, “below”, and “below” of the second feature, including the fact that the first feature is directly below and obliquely below the second feature, or merely indicates that the first feature is less horizontal than the second feature.
  • a double-layer metal wiring is designed in the bending area.
  • the first layer of metal wiring is a discontinuous block structure, and the second layer of metal wiring forms a wave-shaped wiring through contact holes (PLN holes).
  • the wire is connected to the first layer of metal traces in the contact hole, which reduces the stress on the bending of the metal traces, reduces the probability of metal traces breaking in the bending area of the flexible display, and improves reliability Role.
  • the flexible display panel of the present invention includes an organic layer, an organic layer, a first metal layer, a first organic flat layer (PLN layer), and a second metal layer.
  • a first metal layer trace is disposed on the organic layer, and the first metal layer trace includes a plurality of first metal blocks that are separately disposed at a bending area corresponding to the flexible display panel.
  • a first organic flat layer is disposed on the first metal layer trace, and at least one contact hole is formed between two adjacent first metal blocks on the first organic flat layer corresponding to the bending area.
  • a second metal layer trace is disposed on the first organic flat layer, and the second metal layer trace forms a wavy trace through the contact hole at a position corresponding to the bending area, and the contact is formed at the contact. The hole is connected to the corresponding first metal block.
  • the first organic flat layer is provided with at least one contact hole between two adjacent first metal blocks perpendicular to the axis direction of the bending area.
  • the flexible display panel provided by the present invention has a double-layer structure through a part of the metal routing section of the bending area, and the wave-shaped routing design of the second metal layer routing can reduce the stress on the metal routing during the bending process. Reduce the probability of metal trace breakage in the bending area of the flexible display to ensure the stability of the metal trace resistance; and the connection part of the first metal layer trace and the second metal layer trace can improve reliability and reduce In order to ensure that the signal transmission is normal, the probability that the trace breaks will cause abnormal display.
  • the first metal layer traces 12 are disposed on the organic layer 11.
  • the first metal layer traces 12 include a plurality of first metal blocks 121 that are separately disposed at the bending region 10 corresponding to the flexible display panel.
  • the first organic flat layer 13 is disposed on the first metal layer trace 12.
  • a contact hole 131 is formed on the head of each first metal block 121 corresponding to the bending area 10 on the first organic flat layer 13.
  • the second metal layer trace 14 is disposed on the first organic flat layer 13.
  • the second metal layer trace 14 forms a wavy trace through the contact hole 131 at the corresponding bending area 10, and is in contact with the corresponding one in the contact hole 131.
  • the heads of the first metal blocks 121 are connected.
  • the second metal layer routing adopts a wave-shaped routing design, which can reduce the stress on the metal routing during the bending process, reduce the probability of metal routing breakage in the bending area of the flexible display, and ensure the metal routing resistance. Stable; the connection part of the first metal layer trace and the second metal layer trace can improve the reliability, reduce the probability of abnormal display caused by the trace break, and ensure normal signal transmission.
  • Materials of the first metal layer and the second metal layer may be metals such as aluminum, titanium, and molybdenum, and may also be one of alloys such as aluminum alloy, titanium alloy, and molybdenum alloy, which is not specifically limited in the present invention.
  • a second organic flat layer 15 is further provided on the second metal layer trace 14. The second organic flat layer 15 can fill the unevenness formed by the lower metal layer (second metal layer) to facilitate the production of an upper layer. Circuit.
  • FIG. 2 a cross-sectional view of a bent region of a second embodiment of a flexible display panel according to the present invention.
  • a contact hole 132 is formed in the tail of each first metal block 121 corresponding to the bending region 10 on the first organic flat layer 13.
  • the second metal layer trace 14 forms a wavy trace through the contact hole 132 at the corresponding bending area 10, and is connected to the tail of the corresponding first metal block 121 in the contact hole 132.
  • FIG. 3 a cross-sectional view of a bent region of a third embodiment of a flexible display panel according to the present invention.
  • a contact hole is also formed in the tail of each first metal block 121 corresponding to the bending region 10 on the first organic flat layer 13.
  • the second metal layer trace 14 forms a wavy trace through the contact holes 131, 132 at the corresponding bending area 10, and is connected to the head of the corresponding first metal block 121 in the contact hole 131, and the contact hole 132 is connected to the tail of the corresponding first metal block 121.
  • FIG. 4 a cross-sectional view of a bent region of a fourth embodiment of a flexible display panel according to the present invention.
  • the first organic flat layer 13 is further provided with at least two adjacent first metal blocks 121 corresponding to the bending area 10.
  • a through hole 134; the second metal layer trace 14 forms a wavy trace through the contact holes 131, 132 and the through hole 134 at the corresponding bending area 10, and is in contact with the head of the corresponding first metal block 121 in the contact hole 131 It is connected to the tail portion of the corresponding first metal block 121 in the contact hole 132.
  • the through hole 134 may also be provided in the first embodiment shown in FIG.
  • the second metal layer trace 14 passes at the corresponding bending area 10.
  • the contact hole 131 (or the contact hole 132) and the through hole 134 form a wavy trace, and are connected to the head or the tail of the corresponding first metal block 121 in the contact hole 131 (or the contact hole 132).
  • the present invention also provides a flexible display device using the flexible display panel.
  • Part of the metal trace is a double-layer structure, and the second metal trace is a wavy trace design, which can reduce the stress on the metal trace during the bending process and reduce the metal trace in the bending area of the flexible display.
  • the probability of breakage ensures the stability of the metal trace resistance; and the connection part of the first metal layer trace and the second metal layer trace can improve the reliability, reducing the probability of display abnormality caused by trace breakage, ensuring that Signal transmission is normal.
  • the present invention also provides a method for manufacturing a flexible display panel, with reference to FIGS. 5 and 6A-6C, wherein FIG. 5 is a flowchart of an embodiment of a method for manufacturing a flexible display panel according to the present invention, and FIGS. 6A-6C are The manufacturing process flow chart of the embodiment of the flexible display panel according to the present invention.
  • the method includes: S51: providing an organic layer; S52: depositing a first metal layer on the organic layer and patterning a first metal layer trace, the first metal layer trace is included in a bending area corresponding to the flexible display panel A plurality of first metal blocks spaced apart from each other; S53: forming a first organic flat layer on the first metal layer, and opening between two adjacent first metal blocks at corresponding bending regions on the first organic flat layer At least one contact hole; S54: depositing a second metal layer on the first organic flat layer and patterning forming a second metal layer trace, the second metal layer trace forms a wavy trace through the contact hole at the corresponding bending area And connected to the corresponding first metal block in the contact hole.
  • a first metal layer is deposited on the organic layer and patterned to form a first metal layer trace.
  • the first metal layer trace includes a plurality of first metal blocks spaced apart at a bending area corresponding to the flexible display panel. Please refer to FIG. 5 and FIG. 6A together.
  • a first metal layer (Metal layer) is deposited on the organic layer 11 and patterned to form a first metal layer trace 12.
  • the first metal layer trace 12 includes a partition at a bending area 10 corresponding to the flexible display panel.
  • a plurality of first metal blocks 121 are provided.
  • the material of the first metal layer may be metal such as aluminum, titanium, and molybdenum, and may also be one of alloys such as aluminum alloy, titanium alloy, and molybdenum alloy, which is not specifically limited in the present invention.
  • step S53 forming a first organic flat layer on the first metal layer, and opening at least one contact hole between two adjacent first metal blocks at corresponding bending regions on the first organic flat layer, please also refer to 5 and 6B.
  • the first organic flat layer 13 may be disposed on the first metal layer trace 12 by coating.
  • a head of each first metal block 121 corresponding to the bending area 10 on the first organic flat layer 13 is provided.
  • Each of the contact hole 131 and the tail is provided with a contact hole 132.
  • a contact hole 131 may be provided only in the head of each first metal block 121 corresponding to the bending region 10 on the first organic flat layer 13, or only a contact hole 132 may be provided in the tail only.
  • At least one through hole 134 may also be opened between two adjacent first metal blocks 121 corresponding to the bending area 10.
  • the organic flat layer is thicker and can fill the unevenness formed by the lower metal layer to facilitate the production of the upper circuit.
  • a second metal layer is deposited on the first organic flat layer and patterned to form a second metal layer trace.
  • the second metal layer trace forms a wavy trace through a contact hole at the corresponding bending area, and The contact hole is connected to the corresponding first metal block.
  • the second metal layer trace 14 forms a wavy trace through the contact holes 131 and 132 at the corresponding bending area 10, and is connected to the head or the tail of the corresponding first metal block 121 in the contact holes 131 and 132.
  • the material of the second metal layer may be metal such as aluminum, titanium, molybdenum, or one of alloys such as aluminum alloy, titanium alloy, and molybdenum alloy, which is not specifically limited in the present invention.
  • the method further includes forming a second organic flat layer on the second metal layer trace.
  • the second organic flat layer can fill the unevenness formed by the lower metal layer, so as to make an upper circuit.
  • a cross-sectional view of the bent area of the prepared flexible display panel is shown in FIG. 4.

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Abstract

本发明揭露一种柔性显示面板、柔性显示装置及柔性显示面板制备方法，通过柔性显示面板弯折区部分金属走线段为双层结构，第二金属层走线采用波浪形走线设计，可降低金属走线在弯折过程中的所受到的应力，减小柔性显示器的弯折区域金属走线断裂的几率，确保金属走线阻值稳定；并且第一金属层走线和第二金属层走线连接部分可起到提高信赖性的作用，减小了走线断裂导致显示异常的几率，确保信号传输正常。

Description

柔性显示面板、柔性显示装置及柔性显示面板制备方法 技术领域
本发明涉及显示技术领域，尤其涉及一种柔性显示面板、柔性显示装置及柔性显示面板制备方法。
 背景技术
柔性显示器（Flexible display device）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。随着显示面板技术的不断更新，小尺寸面板正在朝着轻薄化、窄边框、无边框的方向发展，而弯折区（Pad bending）是窄边框/无边框的核心技术，目前一般可做到弯折（bending）半径0.5mm以下。
 技术问题
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。
因此，如何降低金属走线应力，减小柔性显示器的弯折区域金属走线断裂的几率，确保金属走线阻值稳定，信号传输正常，是柔性显示、窄边框/无边框技术发展过程中亟待解决的问题。
 技术解决方案
本发明的目的在于，提供一种柔性显示面板、柔性显示装置及柔性显示面板制备方法，可以降低金属走线应力，减小柔性显示器的弯折区域金属走线断裂的几率，提高信赖性，减小走线断裂导致显示异常的几率。
为实现上述目的，本发明提供了一种柔性显示面板，包括有机层，所述柔性显示面板还包括：第一金属层走线，设置在所述有机层上，所述第一金属层走线包括在对应所述柔性显示面板的弯折区处分隔设置的多个第一金属块；第一有机平坦层，设置在所述第一金属层走线上，所述第一有机平坦层上对应所述弯折区处的相邻的两第一金属块之间开设有至少一接触孔；第二金属层走线，设置在所述第一有机平坦层上，所述第二金属层走线在对应所述弯折区处通过所述接触孔形成波浪形走线，并在所述接触孔中与对应的第一金属块相连。
为实现上述目的，本发明还提供了一种柔性显示装置，所述柔性显示装置包括柔性显示面板，所述柔性显示面板包括有机层；所述柔性显示面板还包括：第一金属层走线，设置在所述有机层上，所述第一金属层走线包括在对应所述柔性显示面板的弯折区处分隔设置的多个第一金属块；第一有机平坦层，设置在所述第一金属层走线上，所述第一有机平坦层上对应所述弯折区处的相邻的两第一金属块之间开设有至少一接触孔；第二金属层走线，设置在所述第一有机平坦层上，所述第二金属层走线在对应所述弯折区处通过所述接触孔形成波浪形走线，并在所述接触孔中与对应的第一金属块相连。
为实现上述目的，本发明还提供了一种柔性显示面板的制备方法，包括如下步骤：提供一有机层；在所述有机层上沉积第一金属层并图形化形成第一金属层走线，所述第一金属层走线包括在对应所述柔性显示面板的弯折区处分隔设置的多个第一金属块；在所述第一金属层上形成第一有机平坦层，在所述第一有机平坦层上对应所述弯折区处的相邻的两第一金属块之间开设至少一接触孔；在所述第一有机平坦层上沉积第二金属层并图形化形成第二金属层走线，所述第二金属层走线在对应所述弯折区处通过所述接触孔形成波浪形走线，并在所述接触孔中与对应的第一金属块相连。
 有益效果
本发明通过柔性显示面板弯折区部分金属走线段为双层结构，第二金属层走线采用波浪形走线设计，可降低金属走线在弯折过程中的所受到的应力，减小柔性显示器的弯折区域金属走线断裂的几率，确保金属走线阻值稳定；并且第一金属层走线和第二金属层走线连接部分可起到提高信赖性的作用，减小了走线断裂导致显示异常的几率，确保信号传输正常。
 附图说明
为了更清楚地说明本发明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发明的一些实施例，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，本发明所述的柔性显示面板第一实施例的弯折区剖视图；
图2，本发明所述的柔性显示面板第二实施例的弯折区剖视图；
图3，本发明所述的柔性显示面板第三实施例的弯折区剖视图；
图4，本发明所述的柔性显示面板第四实施例的弯折区剖视图；
图5，本发明所述的柔性显示面板的制备方法的实施例的流程图；
图6A-6C，本发明所述的柔性显示面板的实施例的制备工艺流程图。
 本发明的实施方式
下面详细描述本发明的实施方式，所述实施方式的示例在附图中示出，其中自始至终相同或类似的标号表示相同或类似的元件或具有相同或类似功能的元件。下面通过参考附图描述的实施方式是示例性的，仅用于解释本发明，而不能理解为对本发明的限制。
在本发明中，除非另有明确的规定和限定，第一特征在第二特征之“上”或之“下”可以包括第一和第二特征直接接触，也可以包括第一和第二特征不是直接接触而是通过它们之间的另外的特征接触。而且，第一特征在第二特征“之上”、“上方”和“上面”包括第一特征在第二特征正上方和斜上方，或仅仅表示第一特征水平高度高于第二特征。第一特征在第二特征“之下”、“下方”和“下面”包括第一特征在第二特征正下方和斜下方，或仅仅表示第一特征水平高度小于第二特征。
下文的公开提供了许多不同的实施方式或例子用来实现本发明的不同结构。为了简化本发明的公开，下文中对特定例子的部件和设置进行描述。当然，它们仅仅为示例，并且目的不在于限制本发明。此外，本发明可以在不同例子中重复参考数字和/或参考字母，这种重复是为了简化和清楚的目的，其本身不指示所讨论各种实施方式和/或设置之间的关系。此外，本发明提供了的各种特定的工艺和材料的例子，但是本领域普通技术人员可以意识到其他工艺的应用和/或其他材料的使用。
本发明所述的柔性显示面板，在弯折区设计双层金属走线，第一层金属走线为不连续块状结构，第二层金属走线通过接触孔（PLN孔）形成波浪形走线并在接触孔内与第一层金属走线相连，起到降低金属走线弯折（bending）时所受应力，减小柔性显示器的弯折区域金属走线断裂的几率，以及提高信赖性的作用。
具体的，本发明所述的柔性显示面板，包括有机层（Organic layer）、第一金属层（Metal layer）走线、第一有机平坦层（PLN层）以及第二金属层走线。第一金属层走线，设置在所述有机层上，所述第一金属层走线包括在对应所述柔性显示面板的弯折区处分隔设置的多个第一金属块。第一有机平坦层，设置在所述第一金属层走线上，所述第一有机平坦层上对应所述弯折区处的相邻的两第一金属块之间开设有至少一接触孔。第二金属层走线，设置在所述第一有机平坦层上，所述第二金属层走线在对应所述弯折区处通过所述接触孔形成波浪形走线，并在所述接触孔中与对应的第一金属块相连。可选的，所述第一有机平坦层在垂直于所述弯折区轴线方向上的相邻的两第一金属块之间开设有至少一接触孔。
本发明提供的柔性显示面板，通过弯折区部分金属走线段为双层结构，第二金属层走线采用波浪形走线设计，可降低金属走线在弯折过程中的所受到的应力，减小柔性显示器的弯折区域金属走线断裂的几率，确保金属走线阻值稳定；并且第一金属层走线和第二金属层走线连接部分可起到提高信赖性的作用，减小了走线断裂导致显示异常的几率，确保信号传输正常。
参考图1，本发明所述的柔性显示面板第一实施例的弯折区剖视图。第一金属层走线12设置在有机层11上，第一金属层走线12包括在对应柔性显示面板的弯折区10处分隔设置的多个第一金属块121。第一有机平坦层13设置在第一金属层走线12上，第一有机平坦层13上对应弯折区10处的每一第一金属块121的头部均开设有一接触孔131。第二金属层走线14设置在第一有机平坦层13上，第二金属层走线14在对应弯折区10处通过接触孔131形成波浪形走线，并在接触孔131中与对应的第一金属块121的头部相连。第二金属层走线采用波浪形走线设计，可降低金属走线在弯折过程中的所受到的应力，减小柔性显示器的弯折区域金属走线断裂的几率，确保金属走线阻值稳定；第一金属层走线和第二金属层走线连接部分可起到提高信赖性的作用，减小了走线断裂导致显示异常的几率，确保信号传输正常。第一金属层与第二金属层的材料可以为铝、钛、钼等金属，也可以为铝合金、钛合金、钼合金等合金中的一种，本发明对此不做具体限定。优选的，在第二金属层走线14上还设有第二有机平坦层15，第二有机平坦层15可以把下层金属层（第二金属层）形成的凹凸填平，以便于制作更上层的电路。
参考图2，本发明所述的柔性显示面板第二实施例的弯折区剖视图。与图1所述第一实施例的不同之处在于，在本实施例中，第一有机平坦层13上对应弯折区10处的每一第一金属块121的尾部均开设有一接触孔132；第二金属层走线14在对应弯折区10处通过接触孔132形成波浪形走线，并在接触孔132中与对应的第一金属块121的尾部相连。
参考图3，本发明所述的柔性显示面板第三实施例的弯折区剖视图。与图1所述第一实施例的不同之处在于，在本实施例中，第一有机平坦层13上对应弯折区10处的每一第一金属块121的尾部也均开设有一接触孔132；第二金属层走线14在对应弯折区10处通过接触孔131、132形成波浪形走线，并在接触孔131中与对应的第一金属块121的头部相连，在接触孔132中与对应的第一金属块121的尾部相连。
参考图4，本发明所述的柔性显示面板第四实施例的弯折区剖视图。与图3所述第三实施例的不同之处在于，在本实施例中，第一有机平坦层13在对应弯折区10处的相邻的两第一金属块121之间还开设有至少一通孔134；第二金属层走线14在对应弯折区10处通过接触孔131、132和通孔134形成波浪形走线，并在接触孔131中与对应的第一金属块121的头部相连，在接触孔132中与对应的第一金属块121的尾部相连。可选的，所述通孔134还可以设置于图1所示第一实施例或图2所示第二实施例中，对应的，第二金属层走线14在对应弯折区10处通过接触孔131（或接触孔132）和通孔134形成波浪形走线，并在接触孔131（或接触孔132）中与对应的第一金属块121的头部或尾部相连。
本发明还提供一种采用上述柔性显示面板的柔性显示装置。通过部分金属走线为双层结构，第二金属层走线采用波浪形走线设计，可降低金属走线在弯折过程中的所受到的应力，减小柔性显示器的弯折区域金属走线断裂的几率，确保金属走线阻值稳定；并且第一金属层走线和第二金属层走线连接部分可起到提高信赖性的作用，减小了走线断裂导致显示异常的几率，确保信号传输正常。
本发明还提供一种柔性显示面板的制备方法，参考图5以及图6A-6C，其中，图5为本发明所述的柔性显示面板的制备方法的实施例的流程图，图6A-6C为本发明所述的柔性显示面板的实施例的制备工艺流程图。所述方法包括：S51：提供一有机层；S52：在有机层上沉积第一金属层并图形化形成第一金属层走线，第一金属层走线包括在对应柔性显示面板的弯折区处分隔设置的多个第一金属块；S53：在第一金属层上形成第一有机平坦层，在第一有机平坦层上对应弯折区处的相邻的两第一金属块之间开设至少一接触孔；S54：在第一有机平坦层上沉积第二金属层并图形化形成第二金属层走线，第二金属层走线在对应弯折区处通过接触孔形成波浪形走线，并在接触孔中与对应的第一金属块相连。
关于步骤S52：在有机层上沉积第一金属层并图形化形成第一金属层走线，第一金属层走线包括在对应柔性显示面板的弯折区处分隔设置的多个第一金属块，请一并参考图5以及图6A。在有机层（Organic layer）11上沉积第一金属层（Metal layer）并图形化形成第一金属层走线12，第一金属层走线12包括在对应柔性显示面板的弯折区10处分隔设置的多个第一金属块121。第一金属层的材料可以为铝、钛、钼等金属，也可以为铝合金、钛合金、钼合金等合金中的一种，本发明对此不做具体限定。
关于步骤S53：在第一金属层上形成第一有机平坦层，在第一有机平坦层上对应弯折区处的相邻的两第一金属块之间开设至少一接触孔，请一并参考图5以及图6B。第一有机平坦层13可以通过涂布的方式设置在第一金属层走线12上；第一有机平坦层13上对应弯折区10处的每一第一金属块121的头部均开设有一接触孔131、尾部均开设有一接触孔132。在其它实施例中，可以仅在第一有机平坦层13上对应弯折区10处的每一第一金属块121的头部均开设有一接触孔131，或仅在尾部均开设有一接触孔132；还可以在对应弯折区10处的相邻的两第一金属块121之间开设至少一通孔134。有机平坦层较厚，可以把下层金属层形成的凹凸填平，以便于制作更上层的电路。
关于步骤S54：在第一有机平坦层上沉积第二金属层并图形化形成第二金属层走线，第二金属层走线在对应弯折区处通过接触孔形成波浪形走线，并在接触孔中与对应的第一金属块相连，请一并参考图5以及图6C。第二金属层走线14在对应弯折区10处通过接触孔131、132形成波浪形走线，并在接触孔131、132中与对应的第一金属块121的头部或尾部相连。第二金属层的材料可以为铝、钛、钼等金属，也可以为铝合金、钛合金、钼合金等合金中的一种，本发明对此不做具体限定。
优选的，所述方法进一步包括在第二金属层走线上形成第二有机平坦层。第二有机平坦层可以把下层金属层形成的凹凸填平，以便于制作更上层的电路。制备好的柔性显示面板的弯折区的剖视图参考图4所示。
 工业实用性
本申请的主题可以在工业中制造和使用，具备工业实用性。

Claims (13)

  1. 一种柔性显示面板，包括有机层，其中，所述柔性显示面板还包括：第一金属层走线，设置在所述有机层上，所述第一金属层走线包括在对应所述柔性显示面板的弯折区处分隔设置的多个第一金属块；第一有机平坦层，设置在所述第一金属层走线上，所述第一有机平坦层上对应所述弯折区处的相邻的两第一金属块之间开设有至少一接触孔；第二金属层走线，设置在所述第一有机平坦层上，所述第二金属层走线在对应所述弯折区处通过所述接触孔形成波浪形走线，并在所述接触孔中与对应的第一金属块相连。
  2. 如权利要求1所述的柔性显示面板，其中，所述第一有机平坦层在垂直于所述弯折区轴线方向上的相邻的两第一金属块之间开设有至少一接触孔。
  3. 如权利要求1所述的柔性显示面板，其中，每一所述接触孔均设置于对应的第一金属块的头部，所述第二金属层走线在所述接触孔中与对应的第一金属块的头部相连。
  4. 如权利要求1所述的柔性显示面板，其中，每一所述接触孔均设置于对应的第一金属块的尾部，所述第二金属层走线在所述接触孔中与对应的第一金属块的尾部相连。
  5. 如权利要求1所述的柔性显示面板，其中，每一所述第一金属块的头部和尾部均设有接触孔，所述第二金属层走线在所述接触孔中分别与对应的第一金属块的头部或尾部相连。
  6. 如权利要求1所述的柔性显示面板，其中，所述第一有机平坦层在对应所述弯折区处的相邻的两第一金属块之间开设有至少一通孔，所述第二金属层走线在对应所述弯折区处通过所述接触孔和所述通孔形成波浪形走线并在所述接触孔中与对应的第一金属块相连。
  7. 一种柔性显示装置，所述柔性显示装置包括柔性显示面板，所述柔性显示面板包括有机层；其中，所述柔性显示面板还包括：第一金属层走线，设置在所述有机层上，所述第一金属层走线包括在对应所述柔性显示面板的弯折区处分隔设置的多个第一金属块；第一有机平坦层，设置在所述第一金属层走线上，所述第一有机平坦层上对应所述弯折区处的相邻的两第一金属块之间开设有至少一接触孔；第二金属层走线，设置在所述第一有机平坦层上，所述第二金属层走线在对应所述弯折区处通过所述接触孔形成波浪形走线，并在所述接触孔中与对应的第一金属块相连。
  8. 如权利要求7所述的柔性显示装置，其中，所述第一有机平坦层在垂直于所述弯折区轴线方向上的相邻的两第一金属块之间开设有至少一接触孔。
  9. 如权利要求7所述的柔性显示装置，其中，每一所述接触孔均设置于对应的第一金属块的头部，所述第二金属层走线在所述接触孔中与对应的第一金属块的头部相连。
  10. 如权利要求7所述的柔性显示装置，其中，每一所述接触孔均设置于对应的第一金属块的尾部，所述第二金属层走线在所述接触孔中与对应的第一金属块的尾部相连。
  11. 如权利要求7所述的柔性显示装置，其中，每一所述第一金属块的头部和尾部均设有接触孔，所述第二金属层走线在所述接触孔中分别与对应的第一金属块的头部或尾部相连。
  12. 如权利要求7所述的柔性显示装置，其中，所述第一有机平坦层在对应所述弯折区处的相邻的两第一金属块之间开设有至少一通孔，所述第二金属层走线在对应所述弯折区处通过所述接触孔和所述通孔形成波浪形走线并在所述接触孔中与对应的第一金属块相连。
  13. 一种柔性显示面板的制备方法，其中，包括如下步骤：提供一有机层；在所述有机层上沉积第一金属层并图形化形成第一金属层走线，所述第一金属层走线包括在对应所述柔性显示面板的弯折区处分隔设置的多个第一金属块；在所述第一金属层上形成第一有机平坦层，在所述第一有机平坦层上对应所述弯折区处的相邻的两第一金属块之间开设至少一接触孔；在所述第一有机平坦层上沉积第二金属层并图形化形成第二金属层走线，所述第二金属层走线在对应所述弯折区处通过所述接触孔形成波浪形走线，并在所述接触孔中与对应的第一金属块相连。
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