WO2020172958A1 - 一种显示面板及显示装置 - Google Patents

一种显示面板及显示装置 Download PDF

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Publication number
WO2020172958A1
WO2020172958A1 PCT/CN2019/082182 CN2019082182W WO2020172958A1 WO 2020172958 A1 WO2020172958 A1 WO 2020172958A1 CN 2019082182 W CN2019082182 W CN 2019082182W WO 2020172958 A1 WO2020172958 A1 WO 2020172958A1
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WIPO (PCT)
Prior art keywords
metal wire
display panel
adjustment layer
stress
stress adjustment
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Application number
PCT/CN2019/082182
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English (en)
French (fr)
Inventor
王威
黄情
Original Assignee
武汉华星光电半导体显示技术有限公司
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Application filed by 武汉华星光电半导体显示技术有限公司 filed Critical 武汉华星光电半导体显示技术有限公司
Priority to US16/496,457 priority Critical patent/US11244968B2/en
Publication of WO2020172958A1 publication Critical patent/WO2020172958A1/zh

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Classifications

    • H—ELECTRICITY
    • H01—ELECTRIC ELEMENTS
    • H01L—SEMICONDUCTOR DEVICES NOT COVERED BY CLASS H10
    • H01L27/00—Devices consisting of a plurality of semiconductor or other solid-state components formed in or on a common substrate
    • H01L27/02—Devices consisting of a plurality of semiconductor or other solid-state components formed in or on a common substrate including semiconductor components specially adapted for rectifying, oscillating, amplifying or switching and having potential barriers; including integrated passive circuit elements having potential barriers
    • H01L27/12—Devices consisting of a plurality of semiconductor or other solid-state components formed in or on a common substrate including semiconductor components specially adapted for rectifying, oscillating, amplifying or switching and having potential barriers; including integrated passive circuit elements having potential barriers the substrate being other than a semiconductor body, e.g. an insulating body
    • H01L27/1214—Devices consisting of a plurality of semiconductor or other solid-state components formed in or on a common substrate including semiconductor components specially adapted for rectifying, oscillating, amplifying or switching and having potential barriers; including integrated passive circuit elements having potential barriers the substrate being other than a semiconductor body, e.g. an insulating body comprising a plurality of TFTs formed on a non-semiconducting substrate, e.g. driving circuits for AMLCDs
    • H01L27/124—Devices consisting of a plurality of semiconductor or other solid-state components formed in or on a common substrate including semiconductor components specially adapted for rectifying, oscillating, amplifying or switching and having potential barriers; including integrated passive circuit elements having potential barriers the substrate being other than a semiconductor body, e.g. an insulating body comprising a plurality of TFTs formed on a non-semiconducting substrate, e.g. driving circuits for AMLCDs with a particular composition, shape or layout of the wiring layers specially adapted to the circuit arrangement, e.g. scanning lines in LCD pixel circuits
    • H01L27/1244—Devices consisting of a plurality of semiconductor or other solid-state components formed in or on a common substrate including semiconductor components specially adapted for rectifying, oscillating, amplifying or switching and having potential barriers; including integrated passive circuit elements having potential barriers the substrate being other than a semiconductor body, e.g. an insulating body comprising a plurality of TFTs formed on a non-semiconducting substrate, e.g. driving circuits for AMLCDs with a particular composition, shape or layout of the wiring layers specially adapted to the circuit arrangement, e.g. scanning lines in LCD pixel circuits for preventing breakage, peeling or short circuiting
    • G—PHYSICS
    • G09—EDUCATION; CRYPTOGRAPHY; DISPLAY; ADVERTISING; SEALS
    • G09F—DISPLAYING; ADVERTISING; SIGNS; LABELS OR NAME-PLATES; SEALS
    • G09F9/00—Indicating arrangements for variable information in which the information is built-up on a support by selection or combination of individual elements
    • G09F9/30—Indicating arrangements for variable information in which the information is built-up on a support by selection or combination of individual elements in which the desired character or characters are formed by combining individual elements
    • H—ELECTRICITY
    • H01—ELECTRIC ELEMENTS
    • H01L—SEMICONDUCTOR DEVICES NOT COVERED BY CLASS H10
    • H01L27/00—Devices consisting of a plurality of semiconductor or other solid-state components formed in or on a common substrate
    • H01L27/02—Devices consisting of a plurality of semiconductor or other solid-state components formed in or on a common substrate including semiconductor components specially adapted for rectifying, oscillating, amplifying or switching and having potential barriers; including integrated passive circuit elements having potential barriers
    • H01L27/12—Devices consisting of a plurality of semiconductor or other solid-state components formed in or on a common substrate including semiconductor components specially adapted for rectifying, oscillating, amplifying or switching and having potential barriers; including integrated passive circuit elements having potential barriers the substrate being other than a semiconductor body, e.g. an insulating body
    • H01L27/1214—Devices consisting of a plurality of semiconductor or other solid-state components formed in or on a common substrate including semiconductor components specially adapted for rectifying, oscillating, amplifying or switching and having potential barriers; including integrated passive circuit elements having potential barriers the substrate being other than a semiconductor body, e.g. an insulating body comprising a plurality of TFTs formed on a non-semiconducting substrate, e.g. driving circuits for AMLCDs
    • H01L27/1218—Devices consisting of a plurality of semiconductor or other solid-state components formed in or on a common substrate including semiconductor components specially adapted for rectifying, oscillating, amplifying or switching and having potential barriers; including integrated passive circuit elements having potential barriers the substrate being other than a semiconductor body, e.g. an insulating body comprising a plurality of TFTs formed on a non-semiconducting substrate, e.g. driving circuits for AMLCDs with a particular composition or structure of the substrate
    • H—ELECTRICITY
    • H01—ELECTRIC ELEMENTS
    • H01L—SEMICONDUCTOR DEVICES NOT COVERED BY CLASS H10
    • H01L23/00—Details of semiconductor or other solid state devices
    • H01L23/562—Protection against mechanical damage

Definitions

  • the present invention relates to the field of display technology, in particular to a display panel and a display device.
  • Flexible display device Flexible display device
  • Flexible display device As a new generation of display products, has attracted more and more people's attention due to its advantages of ultra-light, ultra-thin, high definition, fast response, bendable, and convenient to carry.
  • the flexible display panel of the flexible display device uses a soft and bendable plastic substrate, which is very suitable for the production of narrow-frame display devices. This is because the peripheral area around the flexible display panel can be bent or folded and placed on the side or under the screen, thereby reducing the proportion of the non-display area in the front area and realizing a narrow frame design.
  • FIG. 1A is a top view of the flexible display device
  • FIG. 1B is a cross-sectional view of the flexible display device shown in FIG. 1A in a bent state
  • FIG. 1C is a bending zone film along the line A-A' in FIG. 1A Sectional view of layer structure.
  • the flexible display panel of the flexible display device includes a display area 11 and a bendable non-display area 12 at the periphery of the display area 11.
  • the non-display area 12 includes a driver chip area 121, a peripheral wiring area 123, and a driver chip area 121 and the periphery.
  • the bending area 122 between the routing areas 123.
  • the peripheral wiring area 123 connects the display area 11 (or GOA area) and the driving chip 1211 of the driving chip area 121 with metal wires.
  • the peripheral wiring area 123 and the driving chip area 121 are folded to the side or below the display area 11 through the bending area 122, as shown in FIG. 1B, thereby achieving a narrow frame design.
  • the bending area 122 includes a flexible substrate 101, a first organic layer 102, a metal line 103, a second organic layer 104, a third organic layer 105, and a fourth organic layer 106 stacked in sequence.
  • the metal line 103 is located between the stacked film layers. Since the film thickness of the flexible substrate 101 and its Young's modulus are relatively large, in general, the stress neutral surface is located in the substrate material, and the metal wire 103 is located above the neutral surface. Examples of typical values of Young's modulus and Poisson's ratio of the film material involved in the bending zone are shown in Table 1.
  • the flexible display needs to be rolled or bent during use, and even frequently bent. In the case of bending, the metal wire 103 is subject to a large amount of stress, which is prone to cracks or breaks, which causes the resistance value of the metal wire 103 to increase or even break. Line, causing the screen to display abnormally.
  • Table 1 Examples of typical values of Young's modulus and Poisson's ratio of the film material in the bending zone.
  • the purpose of the present invention is to provide a display panel and a display device.
  • the stress neutral surface can be adjusted to reduce the metal The stress that the wire receives during bending reduces the probability of metal wire breaking when the display panel is bent, and reduces the risk of metal wire failure.
  • the present invention provides a display panel including a bending area, the bending area includes a flexible substrate, and the bending area further includes: a first metal wire and At least one stress-regulating layer, the stress-regulating layer comprising a plurality of graphic structures arranged separately, the graphic structures are polygonal or at least one side is an arc, the multiple graphic structures are arranged in multiple rows, at least two The pattern structures are arranged in a non-aligned manner along the second direction; the routing direction of the first metal wire is defined as the first direction, and the direction perpendicular to the routing direction is defined as the second direction, and the stress adjustment layer is defined In the graphic structure, a line of graphic structures is arranged along the first direction.
  • the present invention also provides a display panel, including a bending area, the bending area includes a flexible substrate, and the bending area further includes: a first metal wire located above the flexible substrate And at least one stress-regulating layer, the stress-regulating layer comprising a plurality of graphic structures arranged separately.
  • the present invention also provides a display device, including a display panel, the display panel includes a bending area, the bending area includes a flexible substrate; the bending area further includes: The first metal line above the substrate and at least one stress regulating layer, the stress regulating layer including a plurality of pattern structures arranged separately.
  • the stress neutral surface can be adjusted, the stress received by the metal wire during bending can be reduced, and the excessive stress can also prevent or slow down the cracks caused by excessive stress.
  • the generation and expansion of the stress adjustment layer reduces the probability of metal wire breaking when the display panel is bent, and reduces the risk of metal wire failure.
  • FIG. 1A is a top view of a conventional flexible display device
  • FIG. 1B is a cross-sectional view of the flexible display device shown in FIG. 1A in a bent state
  • Figure 1C is a cross-sectional view of the film structure in the bending zone along the line A-A' in Figure 1A;
  • 2A is a cross-sectional view of the layered structure of the first embodiment of the display panel of the present invention.
  • FIG. 2B is a top view of the first metal wire and the stress adjustment layer in the layered structure shown in FIG. 2A;
  • 3A is a cross-sectional view of the layered structure of the second embodiment of the display panel of the present invention.
  • FIG. 4 is a schematic diagram of the layered structure of the third embodiment of the display panel of the present invention.
  • FIG. 5 is a schematic diagram of the layered structure of the fourth embodiment of the display panel of the present invention.
  • the display panel of the present invention includes a bending area, the bending area includes a flexible substrate, at least one metal wire and at least one stress regulating layer located above the flexible substrate, and the stress regulating layer includes a plurality of separately arranged Graphic structure.
  • the stress neutral surface can be adjusted to reduce the stress that the metal wire receives during bending; at the same time, by designing a separate pattern structure in the stress adjustment layer, it can avoid or slow down the excessive stress caused by cracks. Generation and expansion in the stress-regulating layer.
  • the display panel may be, for example, a flexible OLED display panel, a flexible LCD display panel, etc. Other indispensable components of the display panel should be understood by those of ordinary skill in the art, and will not be repeated here. It should not be used as a limitation to the present invention.
  • the stress adjustment layer is made of inorganic or metal materials, which can effectively adjust the stress neutral surface.
  • the plurality of graphic structures are arranged in multiple rows, and at least two rows of the graphic structures are arranged in a non-aligned manner along the second direction, so as to avoid or slow down the generation and expansion of cracks in the stress adjustment layer due to excessive stress .
  • the routing direction of the metal wire is defined as a first direction
  • the direction perpendicular to the routing direction is defined as a second direction
  • the pattern structure of the stress adjustment layer is defined as being arranged along the first direction It is a one-line graphic structure.
  • the pattern structures in the same row may be uniformly distributed to simplify the manufacturing process.
  • the graphic structure of the stress adjustment layer is polygonal or at least one side is an arc, so as to avoid or slow down the generation and expansion of cracks in the stress adjustment layer caused by excessive stress.
  • the metal wire is located between the plurality of graphic structures, so that the stress neutral surface can be effectively adjusted.
  • the stress adjustment layer may be disposed above the metal wire; or, the stress adjustment layer and the metal wire are in the same layer and arranged alternately.
  • the film structure of the bending area of the display panel of the present invention is an improved film structure.
  • the stress neutral surface can be adjusted, and the bending of the metal wire can be reduced.
  • the received stress can also avoid or slow down the generation and expansion of cracks in the stress adjustment layer caused by excessive stress, thereby reducing the probability of metal wire breaking when the display panel is bent, and reducing the risk of metal wire failure.
  • the display panel of the present invention may include multiple layers of stress adjustment layers; the display panel of the present invention may also include two layers of metal lines.
  • the stress adjustment layer is located above the first metal line and/or the second metal line, or is connected to the first metal line. And/or the same layer as the second metal wire. Further description is given below in conjunction with the examples.
  • FIG. 2A-2B where FIG. 2A is a cross-sectional view of the layered structure of the first embodiment of the display panel of the present invention, and FIG. 2B is a top view of the first metal line and the stress adjustment layer in the layered structure shown in FIG. 2A.
  • the bending area 20 of the display panel includes: a flexible substrate 21, a first organic layer 22 provided on the flexible substrate 21, stacked on the first organic layer 22 in turn
  • the first metal line 23, the second organic layer 24, and the stress adjustment layer 25 of, the stress adjustment layer 25 includes a plurality of pattern structures 251 separately arranged.
  • the metal line is located between the plurality of pattern structures, so that the stress neutral surface can be effectively adjusted.
  • two or more stress adjustment layers 25 may be provided on the first metal wire 23 to effectively adjust the stress neutral surface.
  • the flexible substrate 21 may be a flexible and bendable plastic substrate.
  • the first metal wire 23 is used to connect the display area or GOA area of the flexible display panel and the driving chip.
  • the second organic layer 24 can be made of organic materials with better bending properties, and the film layer can be thicker to fill up the unevenness formed by the lower layer of metal lines, so as to facilitate the production of a higher layer circuit.
  • the stress adjustment layer 25 can effectively adjust the stress neutral surface and reduce the stress that the metal wire receives when bending; by designing the stress adjustment layer 25 to have a certain pattern structure 251, and the pattern structures 251 are separated from each other, Avoid or slow down the generation and expansion of cracks in the stress adjustment layer caused by excessive stress, thereby reducing the probability of metal wire breaking when the flexible display is bent, and reducing the risk of metal wire failure.
  • the stress adjustment layer 25 can be made of inorganic or metal materials, which can effectively adjust the stress neutral surface.
  • the stress adjustment layer 25 is disposed above the first metal wire 23.
  • the routing direction of the first metal wire 23 is defined as the first direction
  • the direction perpendicular to the routing direction is defined as the second direction
  • the pattern structure 251 of the stress adjustment layer 25 is defined along the first direction.
  • the pattern structure arranged in the direction is a row
  • the stress adjustment layer 25 includes a plurality of pattern structures 251 arranged separately, arranged in multiple rows.
  • at least two rows of the graphic structures 251 are arranged in a non-aligned arrangement along the second direction, so as to further avoid or reduce the generation and expansion of cracks in the stress adjustment layer caused by excessive stress.
  • other film layers may be continuously provided on the stress adjustment layer 25, such as the third organic layer 26 and the fourth organic layer 27 in the figure.
  • the stress neutral surface can be adjusted, the stress received by the metal wire during bending can be reduced, and the stress can also be avoided or reduced. Too large leads to the generation and expansion of cracks in the stress adjustment layer, thereby reducing the probability of metal wire breaking when the flexible display is bent, and reducing the risk of metal wire failure.
  • the graphic structure 251 is polygonal or at least one side is an arc, and/or there are at least two rows of graphic structures in the graphic structure 251 that are non-aligned in the second direction, so as to further avoid or reduce stress caused by excessive stress. The generation and expansion of cracks in the stress adjustment layer 25.
  • the pattern structures 251 in the same row may be uniformly distributed to simplify the manufacturing process.
  • the stress adjustment layer 25 can be made of a material with a large Young's modulus such as inorganic or metal, which can effectively adjust the stress neutral surface.
  • FIG. 3A is a cross-sectional view of the layered structure of the second embodiment of the display panel of the present invention
  • FIG. 3B is a top view of the first metal wire and the stress regulating layer in the layered structure shown in FIG. 3A.
  • the metal line is located between the plurality of pattern structures, so that the stress neutral surface can be effectively adjusted.
  • the difference from the embodiment shown in FIG. 2A is that, in this embodiment, the stress adjustment layer 25a and the first metal wire 23a are in the same layer and arranged alternately.
  • the bending area 20a includes: a flexible substrate 21a, a first organic layer 22a provided on the flexible substrate 21a, the same layer and alternately arranged on the first organic layer
  • the stress regulating layer 25a includes a plurality of pattern structures 251a arranged separately.
  • one or more stress adjustment layers 25a may be further provided above the first metal wires 23a and the stress adjustment layer 25a arranged alternately in the same layer to effectively adjust the stress neutral surface.
  • a stress adjustment layer 25a may be further provided on the second organic layer 24a, or a stress adjustment layer 25a may be provided on both the second organic layer 24a and the third organic layer 26.
  • the first metal wire 23a and the stress regulating layer 25a are arranged alternately, and the stress regulating layer 25a includes a plurality of pattern structures 251a arranged separately. Specifically, the first metal wire 23a and the stress adjustment layer 25a are arranged alternately along a direction perpendicular to the routing direction of the first metal wire 23a.
  • the pattern structure 251a there are at least two rows of pattern structures 251a in the pattern structure 251a in a non-aligned arrangement along a second direction perpendicular to the routing direction (ie, the first direction) of the first metal line 23a, so as to further avoid or reduce stress Too large causes cracks to occur and expand in the stress adjustment layer.
  • the graphic structure 251a is polygonal or at least one side is an arc to further avoid or slow down the generation and expansion of cracks in the stress adjustment layer caused by excessive stress.
  • the pattern structures 251a in the same row may be uniformly distributed to simplify the manufacturing process.
  • the stress adjustment layer 25a can be made of inorganic or metal materials, which can effectively adjust the stress neutral surface.
  • the bending region 20b further includes a second metal wire 41 disposed above the first metal wire 23b. That is, the bending area 20b of this embodiment includes two layers of metal wires, and the stress adjustment layer is located between the first metal wire 23b and the second metal wire 41. Preferably, two or more stress adjustment layers 25b may be provided between the first metal wire 23b and the second metal wire 41 to effectively adjust the stress neutral surface.
  • the bending area 20b includes: a flexible substrate 21b, a first organic layer 22b provided on the flexible substrate 21, stacked on the first organic layer 22b in sequence
  • the first metal line 23b, the second organic layer 24b, the stress adjustment layer 25b, the third organic layer 26b, the second metal line 41, and the fourth organic layer 27b of, the stress adjustment layer 25b includes a plurality of pattern structures arranged separately 251b.
  • the stress adjustment layer 25b may be disposed above the second metal line 41, or between the first metal line 23b and the second metal line 41 and the second metal line At least one stress adjusting layer 25b is provided above 41 to effectively adjust the stress neutral surface.
  • the bending region 20c further includes a second metal wire 41c disposed above the first metal wire 23c. That is, the bending region 20c of this embodiment includes two layers of metal wires, and the stress adjustment layer 25c and the first metal wires 23c are in the same layer and arranged alternately. Preferably, between the first metal wire 23c and the second metal wire 41c, and/or above the second metal wire 41c, one or more stress adjustment layers 25c may be further provided to effectively adjust the stress. Neutral side.
  • the bending area 20c includes: a flexible substrate 21c, a first organic layer 22c provided on the flexible substrate 21c, and a first organic layer 22c provided on the first organic layer 22c.
  • the first metal wire 23c and the stress adjustment layer 25c arranged alternately, and the second organic layer 24c covering the first metal wire 23c and the stress adjustment layer 25c are sequentially stacked on the second organic layer
  • the stress adjustment layer 25c includes a plurality of pattern structures 251c arranged separately.
  • the stress adjustment layer 25c and the second metal wire 41c may be in the same layer and arranged alternately; preferably, between the first metal wire 23c and the second metal wire 41c, and/ Alternatively, one or more stress adjustment layers 25c may be provided above the second metal wire 41c to effectively adjust the stress neutral surface.
  • the first metal wire 23c is provided with the same layer and alternately arranged stress adjustment layer 25c
  • the second metal wire 41c is also provided with the same layer and alternately arranged stress adjustment layer 25c.
  • one or more of the stress adjustment layers 25c may be provided to effectively adjust Stress neutral surface.
  • the subject of this application can be manufactured and used in industry and has industrial applicability.

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Abstract

公开了一种显示面板及显示装置，通过增设具有分隔设置的多个图形结构(251) 的应力调节层(25)，可以调节应力中性面，降低金属线(23)在弯折时所受到的应力，还可以避免或减缓应力过大导致裂纹在应力调节层(25)中的产生和拓展，从而减小显示面板弯折时金属线(23)断裂的几率，减小金属线(23)失效的风险。

Description

一种显示面板及显示装置 技术领域
本发明涉及显示技术领域，尤其涉及一种显示面板及显示装置。
 背景技术
柔性显示装置（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。柔性显示装置的柔性显示面板采用柔软可弯曲的塑料基板，非常适合窄边框显示设备的制作。这是因为柔性显示面板的四周外围区可以采取弯曲或折叠的方式，将其置于屏幕侧方或下方，从而减小正面区域内非显示区的占比，实现窄边框设计。例如，柔性显示面板可以采用COP工艺（Chip on panel），将外围金属线（连接GOA区或AA区与驱动芯片的金属线）采用阵列工艺（Array）直接制作在柔性基板上，可以省去柔性电路板。同时设计一个弯折区，从而将外围金属线和驱动芯片折叠置于显示区侧方或下方，从而实现窄边框设计。
 技术问题
参考图1A-1C，其中，图1A为柔性显示装置的俯视图，图1B为图1A所示柔性显示装置弯折状态截面图，图1C为沿图1A中A-A’线的弯折区膜层结构截面图。柔性显示装置的柔性显示面板包括显示区11和位于显示区11外围可弯折的非显示区12，非显示区12包括驱动芯片区121、外围走线区123、以及位于驱动芯片区121与外围走线区123之间的弯折区122。外围走线区123利用金属线连接显示区11（或GOA区域）与驱动芯片区121的驱动芯片1211。通过弯折区122将外围走线区123和驱动芯片区121折叠置于显示区11侧方或下方，如图1B所示，从而实现窄边框设计。
如图1C所示，所述弯折区122包括依次层叠设置的柔性衬底101、第一有机层102、金属线103、第二有机层104、第三有机层105以及第四有机层106。由如图1C所示膜层结构可以看出，金属线103位于堆叠的膜层之间。由于柔性衬底101膜厚及其杨氏模量较大，因此，一般情况下应力中性面位于衬底材料之中，而金属线103位于中性面上方。弯折区涉及到膜层材料的杨氏模量和泊松比典型值举例如下表1所示。柔性显示器在使用时需要卷起或者弯曲，甚至频繁弯折，在弯折情况下金属线103所受应力较大，容易产生裂纹（crack）或断裂，导致金属线103阻值增大，甚至断线，从而引起画面显示异常。
膜层材料（Material） 杨氏模量（Mpa） 泊松比
PET薄膜 4000 0.35
平坦层 3400 0.30
柔性基板-聚酰亚胺 9200 0.35
铝（Al） 71000 0.33
钛（Ti） 102000 0.30
非晶态二氧化硅 73100 0.17
非晶态氮化硅 226000 0.288
表1：弯折区涉及到膜层材料的杨氏模量和泊松比典型值举例。
因此，如何有效调节应力中性面，降低金属线在弯折时所受应力，减小柔性显示器弯折时金属线断裂的几率，减小金属线失效的风险，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，提供一种显示面板及显示装置，针对目前显示面板在弯折情况下金属线所受应力较大，容易产生裂纹或断裂的问题，可以通过调节应力中性面，降低金属线在弯折时所受到的应力，减小显示面板弯折时金属线断裂的几率，减小金属线失效的风险。
为实现上述目的，本发明提供了一种显示面板，包括弯折区，所述弯折区包括柔性衬底，所述弯折区还包括：位于所述柔性衬底上方的第一金属线和至少一应力调节层，所述应力调节层包括分隔设置的多个图形结构，所述图形结构为多边形或至少有一条边为弧线，所述的多个图形结构排布成多行，至少两行所述图形结构沿第二方向为非对齐排列；定义所述第一金属线的走线方向为第一方向，定义与所述走线方向垂直方向为第二方向，定义所述应力调节层的所述图形结构中沿所述第一方向排列的为一行图形结构。
为实现上述目的，本发明还提供了一种显示面板，包括弯折区，所述弯折区包括柔性衬底，所述弯折区还包括：位于所述柔性衬底上方的第一金属线和至少一应力调节层，所述应力调节层包括分隔设置的多个图形结构。
为实现上述目的，本发明还提供了一种显示装置，包括显示面板，所述显示面板包括弯折区，所述弯折区包括柔性衬底；所述弯折区还包括：位于所述柔性衬底上方的第一金属线和至少一应力调节层，所述应力调节层包括分隔设置的多个图形结构。
 有益效果
本发明显示面板，通过增设具有分隔设置的多个图形结构的应力调节层，可以调节应力中性面，降低金属线在弯折时所受到的应力，还可以避免或减缓应力过大导致裂纹在应力调节层中的产生和拓展，从而减小显示面板弯折时金属线断裂的几率，减小金属线失效的风险。
 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1A为现有的柔性显示装置的俯视图；
图1B为图1A所示柔性显示装置弯折状态截面图；
图1C为沿图1A中A-A’线的弯折区膜层结构截面图；
图2A为本发明显示面板第一实施例的层状结构截面图；
图2B为图2A所示层状结构中第一金属线与应力调节层的俯视图；
图3A为本发明显示面板第二实施例的层状结构截面图；
图3B为图3A所示层状结构中第一金属线与应力调节层的俯视图；
图4为本发明显示面板第三实施例的层状结构示意图；
图5为本发明显示面板第四实施例的层状结构示意图。
 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。
本发明显示面板，包括弯折区，所述弯折区包括柔性衬底，位于所述柔性衬底上方的至少一金属线和至少一应力调节层，所述应力调节层包括分隔设置的多个图形结构。通过增设应力调节层可以调节应力中性面，降低金属线在弯折时所受到的应力；同时通过在应力调节层设计具有分隔设置的多个图形结构，可以避免或减缓应力过大导致裂纹在应力调节层中的产生和拓展。所述显示面板，例如可以为柔性OLED显示面板、柔性LCD显示面板等等，对于显示面板的其它必不可少的组成部分，均为本领域的普通技术人员应该理解具有的，在此不做赘述，也不应作为对本发明的限制。
优选的，所述应力调节层采用无机或金属材料制成，可以有效地调节应力中性面。
优选的，所述的多个图形结构排布成多行，至少两行所述图形结构沿第二方向为非对齐排列，以避免或减缓应力过大导致裂纹在应力调节层中的产生和拓展。其中，定义所述金属线的走线方向为第一方向，定义与所述走线方向垂直方向为第二方向，定义所述应力调节层的所述图形结构中沿所述第一方向排列的为一行图形结构。优选的，同一行的所述图形结构可以为均匀分布，以简化制程工艺。
优选的，所述应力调节层的所述图形结构为多边形或至少有一条边为弧线，以避免或减缓应力过大导致裂纹在应力调节层中的产生和拓展。
优选的，在俯视视角下，所述金属线位于多个所述图形结构之间，从而可以有效调节应力中性面。比如，所述应力调节层可以设置在所述金属线上方；或，所述应力调节层与所述金属线同层且相间排列。
本发明显示面板的弯折区的膜层结构是一种改进的膜层结构，通过增设具有分隔设置的多个图形结构的应力调节层，可以调节应力中性面，降低金属线在弯折时所受到的应力，还可以避免或减缓应力过大导致裂纹在应力调节层中的产生和拓展，从而减小显示面板弯折时金属线断裂的几率，减小金属线失效的风险。所述图形结构为多边形或至少有一条边为弧线，和/或在所述图形结构中至少存在两行图形结构沿与金属线的走线方向垂直的方向为非对齐排列，以进一步避免或减缓应力过大导致裂纹在应力调节层中的产生和拓展。应力调节层可以采用无机或金属等杨氏模量较大的材料制成，可以有效地调节应力中性面。
本发明显示面板可以包含多层应力调节层；本发明显示面板还可以包含两层金属线，此时，应力调节层位于第一金属线和/或第二金属线上方，或者与第一金属线和/或与第二金属线同层。以下结合实施例给出进一步说明。
参考图2A-2B，其中，图2A为本发明显示面板第一实施例的层状结构截面图，图2B为图2A所示层状结构中第一金属线与应力调节层的俯视图。在本实施例中，所述显示面板的弯折区20包括：柔性衬底21，设于所述柔性衬底21上的第一有机层22，依次层叠设置在所述第一有机层22上的第一金属线23、第二有机层24以及应力调节层25，所述应力调节层25包括分隔设置的多个图形结构251。在俯视视角下，所述金属线位于多个所述图形结构之间，从而可以有效调节应力中性面。在其它实施例中，所述第一金属线23上方可以设置两个或多个应力调节层25，以有效调节应力中性面。
所述柔性衬底21可以采用柔软可弯曲的塑料基板。
所述第一有机层22可以采用弯折性能较好的有机材料。
所述第一金属线23用于连接柔性显示面板的显示区或GOA区域与驱动芯片。
所述第二有机层24可以采用弯折性能较好的有机材料，膜层可以较厚把下层金属线形成的凹凸填平，以便于制作更上层的电路。
所述应力调节层25可以有效调节应力中性面，降低金属线在弯折时所受到的应力；通过设计所述应力调节层25具有一定的图形结构251，且图形结构251间相互分离，可以避免或减缓应力过大导致裂纹在应力调节层中的产生和拓展，从而减小柔性显示器弯折时金属线断裂的几率，减小金属线失效的风险。所述应力调节层25可以采用无机或金属材料制成，可以有效调节应力中性面。
具体的，如图2B所示，所述应力调节层25设置在所述第一金属线23上方。定义所述第一金属线23的走线方向为第一方向，定义与所述走线方向垂直方向为第二方向，定义所述应力调节层25的所述图形结构251中沿所述第一方向排列的为一行图形结构，所述应力调节层25包括分隔设置的多个图形结构251，排布成多行。优选的，至少两行所述图形结构251沿第二方向为非对齐排列，以进一步避免或减缓应力过大导致裂纹在应力调节层中的产生和拓展。所述图形结构251可以为多边形或至少有一条边为弧线，以进一步避免或减缓应力过大导致裂纹在应力调节层中的产生和拓展。优选的，同一行的所述图形结构可以为均匀分布，以简化制程工艺。
继续参考图2A，在本实施例中，在所述应力调节层25之上可以继续设置其它膜层，例如图示中的第三有机层26以及第四有机层27。
本实施例弯折区20，通过增设具有分隔设置的多个图形结构251的应力调节层25，可以调节应力中性面，降低金属线在弯折时所受到的应力，还可以避免或减缓应力过大导致裂纹在应力调节层中的产生和拓展，从而减小柔性显示器弯折时金属线断裂的几率，减小金属线失效的风险。所述图形结构251为多边形或至少有一条边为弧线，和/或在所述图形结构251中至少存在两行图形结构沿第二方向为非对齐排列，以进一步避免或减缓应力过大导致裂纹在所述应力调节层25中的产生和拓展。同一行的所述图形结构251可以为均匀分布，以简化制程工艺。所述应力调节层25可以采用无机或金属等杨氏模量较大的材料制成，可以有效地调节应力中性面。
参考图3A-3B，其中，图3A为本发明显示面板第二实施例的层状结构截面图，图3B为图3A所示层状结构中第一金属线与应力调节层的俯视图。在俯视视角下，所述金属线位于多个所述图形结构之间，从而可以有效调节应力中性面。与图2A所示实施例的不同之处在于，在本实施例中，应力调节层25a与第一金属线23a同层且相间排列。
具体的，在本实施例中，所述弯折区20a包括：柔性衬底21a，设于所述柔性衬底21a上的第一有机层22a，同层且相间排列设置在所述第一有机层22a上的所述第一金属线23a与所述应力调节层25a，覆盖所述第一金属线23a与所述应力调节层25a的第二有机层24a、依次层叠设置在所述第二有机层24a上的第三有机层26a以及第四有机层27a，所述应力调节层25a包括分隔设置的多个图形结构251a。在其它实施例中，同层且相间排列设置的所述第一金属线23a与所述应力调节层25a上方还可以进一步设置一个或一个以上应力调节层25a，以有效调节应力中性面。例如，在所述第二有机层24a上还可以设置一个应力调节层25a，或在所述第二有机层24a以及所述第三有机层26上均设置一个应力调节层25a。
如图3B所示，所述第一金属线23a与所述应力调节层25a相间排列设置，所述应力调节层25a包括分隔设置的多个图形结构251a。具体的，所述第一金属线23a与所述应力调节层25a沿与所述第一金属线23a的走线方向垂直的方向相间排列设置。
优选的，在所述图形结构251a中至少存在两行图形结构251a沿与第一金属线23a的走线方向（即第一方向）垂直的第二方向为非对齐排列，以进一步避免或减缓应力过大导致裂纹在应力调节层中的产生和拓展。所述图形结构251a为多边形或至少有一条边为弧线以进一步避免或减缓应力过大导致裂纹在应力调节层中的产生和拓展。同一行的所述图形结构251a可以为均匀分布，以简化制程工艺。所述应力调节层25a可以采用无机或金属材料制成，可以有效调节应力中性面。
参考图4，本发明显示面板第三实施例的层状结构示意图。与图2A所示实施例的不同之处在于，在本实施例中，弯折区20b进一步包括设置在第一金属线23b上方的第二金属线41。也即，本实施例弯折区20b包含两层金属线，应力调节层位于第一金属线23b与第二金属线41之间。优选的，所述第一金属线23b与所述第二金属线41之间可以设置两个或两个以上应力调节层25b，以有效调节应力中性面。
具体的，在本实施例中，所述弯折区20b包括：柔性衬底21b，设于所述柔性衬底21上的第一有机层22b，依次层叠设置在所述第一有机层22b上的第一金属线23b、第二有机层24b、应力调节层25b、第三有机层26b、第二金属线41以及第四有机层27b，所述应力调节层25b包括分隔设置的多个图形结构251b。在其它实施例中，所述应力调节层25b可以设置在所述第二金属线41上方，或者，所述第一金属线23b与所述第二金属线41之间以及所述第二金属线41上方均设有至少一所述应力调节层25b，以有效调节应力中性面。
参考图5，本发明显示面板第四实施例的层状结构截面图。与图3A所示实施例的不同之处在于，在本实施例中，弯折区20c进一步包括设置在第一金属线23c上方的第二金属线41c。也即，本实施例弯折区20c中包含两层金属线，所述应力调节层25c与所述第一金属线23c同层且相间排列。优选的，所述第一金属线23c与所述第二金属线41c之间，和/或所述第二金属线41c上方还可以设置一个或一个以上所述应力调节层25c，以有效调节应力中性面。
具体的，在本实施例中，所述弯折区20c包括：柔性衬底21c，设于所述柔性衬底21c上的第一有机层22c，设置在所述第一有机层22c上的同层且相间排列的第一金属线23c与所述应力调节层25c，覆盖所述第一金属线23c与所述应力调节层25c的第二有机层24c，依次层叠设置在所述第二有机层24c上的第二金属线41c、第三有机层26c以及第四有机层27c，所述应力调节层25c包括分隔设置的多个图形结构251c。在其它实施例中，所述应力调节层25c可以与所述第二金属线41c同层且相间排列；优选的，所述第一金属线23c与所述第二金属线41c之间，和/或所述第二金属线41c上方还可以设置一个或一个以上所述应力调节层25c，以有效调节应力中性面。在其它实施例中，所述第一金属线23c上设有与其同层且相间排列的应力调节层25c，所述第二金属线41c上也设有与其同层且相间排列的应力调节层25c；优选的，所述第一金属线23c与所述第二金属线41c之间，和/或所述第二金属线41c上方还可以设置一个或一个以上所述应力调节层25c，以有效调节应力中性面。
基于同一发明构思，本发明还提供了一种包括上述显示面板的显示装置。所述显示装置，例如可以为液晶电视、智能手机、液晶屏等等，对于显示装置的其它必不可少的组成部分，均为本领域的普通技术人员应该理解具有的，在此不做赘述，也不应作为对本发明的限制。通过采用增设了应力调节层的显示面板，可以调节应力中性面，降低金属线在弯折时所受到的应力，还可以避免或减缓应力过大导致裂纹在应力调节层中的产生和拓展，从而减小显示面板弯折时金属线断裂的几率，减小金属线失效的风险。
 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 (20)

  1. 一种显示面板，包括弯折区，所述弯折区包括柔性衬底，其中，所述弯折区还包括：位于所述柔性衬底上方的第一金属线和至少一应力调节层，所述应力调节层包括分隔设置的多个图形结构，所述图形结构为多边形或至少有一条边为弧线，所述的多个图形结构排布成多行，至少两行所述图形结构沿第二方向为非对齐排列；定义所述第一金属线的走线方向为第一方向，定义与所述走线方向垂直方向为第二方向，定义所述应力调节层的所述图形结构中沿所述第一方向排列的为一行图形结构。
  2. 如权利要求1所述的显示面板，其中，所述应力调节层采用无机或金属材料制成。
  3. 如权利要求1所述的显示面板，其中，同一行的所述图形结构均匀分布。
  4. 如权利要求1所述的显示面板，其中，在俯视视角下，所述第一金属线位于多个所述图形结构之间。
  5. 如权利要求4所述的显示面板，其中，所述应力调节层设置在所述第一金属线上方；或所述应力调节层与所述第一金属线同层且相间排列。
  6. 如权利要求1所述的显示面板，其中，所述弯折区进一步包括设置在所述第一金属线上方的第二金属线，在俯视视角下，所述第一金属线与所述第二金属线均位于多个所述图形结构之间。
  7. 如权利要求6所述的显示面板，其中，所述应力调节层设置在所述第一金属线与所述第二金属线之间；或所述应力调节层设置在所述第二金属线上方；或所述第一金属线与所述第二金属线之间以及所述第二金属线上方均设有至少一所述应力调节层。
  8. 如权利要求6所述的显示面板，其中，所述应力调节层与所述第一金属线同层且相间排列和/或所述应力调节层与所述第二金属线同层且相间排列。
  9. 一种显示面板，包括弯折区，所述弯折区包括柔性衬底，其中，所述弯折区还包括：位于所述柔性衬底上方的第一金属线和至少一应力调节层，所述应力调节层包括分隔设置的多个图形结构。
  10. 如权利要求9所述的显示面板，其中，所述应力调节层采用无机或金属材料制成。
  11. 如权利要求9所述的显示面板，其中，所述的多个图形结构排布成多行，至少两行所述图形结构沿第二方向为非对齐排列；定义所述第一金属线的走线方向为第一方向，定义与所述走线方向垂直方向为第二方向，定义所述应力调节层的所述图形结构中沿所述第一方向排列的为一行图形结构。
  12. 如权利要求11所述的显示面板，其中，同一行的所述图形结构均匀分布。
  13. 如权利要求9所述的显示面板，其中，所述图形结构为多边形或至少有一条边为弧线。
  14. 如权利要求9所述的显示面板，其中，在俯视视角下，所述第一金属线位于多个所述图形结构之间。
  15. 如权利要求14所述的显示面板，其中，所述应力调节层设置在所述第一金属线上方；或所述应力调节层与所述第一金属线同层且相间排列。
  16. 如权利要求9所述的显示面板，其中，所述弯折区进一步包括设置在所述第一金属线上方的第二金属线，在俯视视角下，所述第一金属线与所述第二金属线均位于多个所述图形结构之间。
  17. 如权利要求16所述的显示面板，其中，所述应力调节层设置在所述第一金属线与所述第二金属线之间；或所述应力调节层设置在所述第二金属线上方；或所述第一金属线与所述第二金属线之间以及所述第二金属线上方均设有至少一所述应力调节层。
  18. 如权利要求16所述的显示面板，其中，所述应力调节层与所述第一金属线同层且相间排列和/或所述应力调节层与所述第二金属线同层且相间排列。
  19. 一种显示装置，包括显示面板，所述显示面板包括弯折区，所述弯折区包括柔性衬底；其中，所述弯折区还包括：位于所述柔性衬底上方的第一金属线和至少一应力调节层，所述应力调节层包括分隔设置的多个图形结构。
  20. 如权利要求19所述的显示装置，其中，所述的多个图形结构排布成多行，至少两行所述图形结构沿第二方向为非对齐排列；定义所述第一金属线的走线方向为第一方向，定义与所述走线方向垂直方向为第二方向，定义所述应力调节层的所述图形结构中沿所述第一方向排列的为一行图形结构。
PCT/CN2019/082182 2012-02-28 2019-04-11 一种显示面板及显示装置 WO2020172958A1 (zh)

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