WO2020082657A1 - 显示面板和显示装置 - Google Patents

显示面板和显示装置 Download PDF

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Publication number
WO2020082657A1
WO2020082657A1 PCT/CN2019/076510 CN2019076510W WO2020082657A1 WO 2020082657 A1 WO2020082657 A1 WO 2020082657A1 CN 2019076510 W CN2019076510 W CN 2019076510W WO 2020082657 A1 WO2020082657 A1 WO 2020082657A1
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Prior art keywords
display panel
line segments
line segment
metal
extending
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PCT/CN2019/076510
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English (en)
French (fr)
Inventor
孙光远
张金方
朱晖
韩珍珍
胡思明
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昆山国显光电有限公司
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Publication of WO2020082657A1 publication Critical patent/WO2020082657A1/zh

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    • 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
    • G09F9/301—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 flexible foldable or roll-able electronic displays, e.g. thin LCD, OLED

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  • the present disclosure relates to the field of display technology, and particularly to a display panel and a display device.
  • the display panel manufacturing process and reliability testing often cause the display panel to break, especially the bendable display panel, and the risk of breakage is higher. Therefore, in order to effectively prevent the display panel from being broken during production or reliability testing, how to effectively detect cracks on the display panel is a technical problem that needs to be solved.
  • the present disclosure provides a display panel and a display device to solve the problems in the related art.
  • a display panel including:
  • a non-display area located at the periphery of the display area
  • a metal wire the metal wire is located in the non-display area; the metal wire includes at least one reciprocating bending section;
  • At least two line segments of the plurality of line segments of the metal wire intersect with an extending line in the extending direction.
  • the plurality of line segments may be divided into a plurality of metal line segment groups, and the extension lines of the line segments in each metal line segment group may be parallel; the extension lines of the line segments in different metal line segment groups may intersect.
  • the plurality of metal line segment groups may include a first metal line segment group and a second metal line segment group; the extending direction of the first metal line segment group may be perpendicular to the extending direction of the second metal line segment group.
  • the line segments in the different metal line segment groups may be alternately arranged and connected in sequence end to end.
  • the width of the plurality of line segments may be the same.
  • the distance between adjacent line segments may be greater than or equal to the width of each line segment in the adjacent line segments.
  • the at least one reciprocating bending section may include a plurality of reciprocating bending sections, and the plurality of reciprocating bending sections are connected in series in sequence.
  • the plurality of reciprocating bending sections may be evenly distributed on the metal wire.
  • At least one of the at least one reciprocating bending section may include a first sub-section and a second sub-section; the first sub-section and the second The sub-sections are connected in series; in the first sub-section, the length of each of the plurality of line segments extending in the first direction is shorter than the length of each of the plurality of line segments extending in the second direction; in the second In the sub-section, the length of each of the plurality of line segments extending in the second direction is shorter than the length of each of the plurality of line segments extending in the first direction; wherein, the first direction and the first The two directions intersect.
  • a plurality of line segments extending along the first direction may be sequentially arranged along the second direction; a plurality of line segments extending along the second direction may be sequentially along the first direction Arrangement; in the second sub-section, a plurality of line segments extending in the first direction may be sequentially arranged along the second direction, and a plurality of line segments extending in the second direction may be along the first
  • the directions are arranged in order.
  • the display panel may further include a driver chip; the driver chip includes a high-level pin;
  • At least one end of the metal wire is electrically connected to the high-level pin.
  • the material of the metal wire may include molybdenum.
  • the display panel may further include a plurality of inorganic layers, and the metal wire is disposed on the inorganic layer on either side between the lowermost layer and the uppermost layer of the multilayer inorganic layers.
  • a display device including the above-mentioned display panel.
  • the display device may also be a low-temperature polysilicon LTPS flexible screen.
  • the non-display area around the display area is provided with a metal wire including a reciprocating bend section, and in the reciprocating bend section, the extending directions of at least two of the plurality of line segments of the metal wire intersect
  • the probability of the metal wire being cut by the crack can be increased, and thus the probability of detecting the crack can be increased, so that whether a crack exists on the display panel can be efficiently detected.
  • FIG. 1 is a schematic structural diagram of a display panel according to related art
  • FIG. 2 is a schematic structural diagram of another display panel according to the related art
  • FIG. 3 is a schematic structural diagram of a display panel according to an embodiment of the present disclosure.
  • FIG. 4 is an enlarged schematic view of part A in the display panel shown in FIG. 3;
  • FIG. 5 is a schematic diagram showing the relationship between the main extension direction and the reciprocating bending direction according to an embodiment of the present disclosure
  • FIG. 6 is a schematic structural diagram of a reciprocating bending section according to an embodiment of the present disclosure.
  • FIG. 7 is a schematic structural diagram of a reciprocating bending section according to an embodiment of the present disclosure.
  • a metal wire 13 may be provided around the display area 12 of the display panel 11.
  • the metal wire 13 is substantially parallel to the edge of the display area 12.
  • the two ends of the metal wire 13 are provided with measuring points 14 and 15. Points 14 and 15 detect the resistance of the metal wire 13 to detect whether there is a crack on the display panel. When the resistance of the metal wire 13 is infinite or greater than the resistance of the metal wire 13 in an intact state, it can be determined that there is a crack on the display panel.
  • a metal wire 24 may also be provided on the non-display area 23 on the periphery of the display area 22 on the substrate 21.
  • the metal wire 24 has a measuring point 25 at one end, and the other end is connected to the measuring point 26 through the transistor T.
  • the transistor T It is also connected to the driving chip 27.
  • the display area 22 is provided with a pixel array composed of pixels, and the measuring point 26 is connected to a column of pixels in the pixel array through the transistor T.
  • the measuring points 25 and 26 can detect whether a row of pixels corresponding to the transistor T is out of control. When out of control, it can be determined that there is a crack.
  • Embodiments of the present disclosure provide a display panel and a display device, which can effectively increase the probability of detecting cracks.
  • the display panel 31 includes a non-display area 32, a display area 33, and a metal wire 34.
  • the non-display area 32 is located on the outer periphery of the display area 33 and is arranged around the display area 33.
  • the metal line 34 is located in the non-display area 32.
  • the metal wire 34 includes a reciprocating bending section A. In the reciprocating bending section A, at least two line segments of the plurality of line segments of the metal wire 34 intersect with extension lines in the extension direction.
  • the line segment 421 extends in the first direction X
  • the line segment 422 extends in the second direction Y.
  • the extension line of the line segment 421 in the extension direction intersects the extension line of the line segment 422 in the extension direction.
  • the line segment 421 may be used to detect cracks extending in the second direction Y
  • the line segment 422 may be used to detect cracks extending in the first direction X. If only metal line segments extending in the second direction Y are provided, cracks extending in the second direction Y may be missed. Therefore, compared with the metal wire segment with a single extending direction on the metal wire 34, the metal wire segment with a different extending direction on the metal wire 34 can effectively detect the occurrence of the event that the metal wire is cut off by the crack, which can effectively improve The probability of detecting a crack, so that the presence or absence of cracks on the display panel can be efficiently detected.
  • the non-display area around the display area is provided with a metal wire including at least one reciprocating bending section, and in at least one of the at least one reciprocating bending section, a plurality of line segments of the metal line
  • the extension lines in the extension direction of at least two of the line segments intersect.
  • the reciprocating bending section A may include a first sub-section 41 and a second sub-section 42.
  • the first sub-section 41 and the second sub-section 42 are connected in series.
  • the first sub-section 41 includes a plurality of line segments 411 extending in the first direction X and a plurality of line segments 412 extending in the second direction Y, wherein the length of the line segment 411 extending in the first direction X is less than The length of the line segment 412 extending along the second direction Y, and a plurality of line segments 412 extending along the second direction Y are sequentially arranged along the first direction X.
  • the second sub-section 42 includes a plurality of line segments 421 extending in the first direction X and a plurality of line segments 422 extending in the second direction Y.
  • the length of the line segment 422 extending in the second direction Y is shorter than the length of the line segment 421 extending in the first direction X.
  • a plurality of line segments 421 extending in the first direction X are sequentially arranged in the second direction Y.
  • the first direction X intersects the second direction Y. Further, the first direction X is perpendicular to the second direction Y.
  • the probability of detecting cracks extending in the first direction X can be increased, same as
  • the second sub-section 42 can increase the probability of detecting cracks extending in the second direction Y.
  • the technical solution of this embodiment can effectively increase the probability of detecting cracks extending in two dimensions on the display panel.
  • the plurality of line segments of the metal wire 34 may be divided into a plurality of metal line segment groups, and the extending directions of the line segments in each metal line segment group are parallel; the extending directions of the line segments in different metal line segment groups intersect.
  • the extending direction of the metal line segment group is the extending direction of the line segment in the metal line segment group.
  • the plurality of line segment groups may be a first metal line segment group L1 and a second metal line segment group L2.
  • the extending direction of the first metal line segment group L1 is perpendicular to the extending direction of the second metal line segment group L2.
  • the first metal line segment group L1 may include a line segment 411 and a line segment 421, and the extending direction of the line segment 411 and the line segment 421 is the first direction X.
  • the second metal line segment group L2 may include a line segment 412 and a line segment 422, and the extending direction of the line segment 412 and the line segment 422 is the second direction Y.
  • the line segments of different metal line segment groups are alternately arranged and connected sequentially.
  • the line segments in the first metal line segment group L1 and the line segments in the second metal line segment group L2 are alternately arranged and sequentially connected end to end.
  • the line segments 411 in the first metal line segment group L1 and the line segments 412 in the second metal line segment group L2 are alternately arranged and connected in order end to end.
  • the line segments 421 in the first metal line segment group L1 and the line segments 422 in the second metal line segment group L2 are alternately arranged and connected in order end to end.
  • the number of the reciprocating bending sections A may be multiple, and are connected in series in sequence.
  • the plurality of reciprocating bending sections A may be evenly distributed on the metal wire 34. In this way, multiple cracks on the edge of the display panel can be detected. Moreover, when the detection result is that there is a crack on the display panel, the crack can be located by locating the reciprocating bending section where the breakpoint exists. Moreover, since a plurality of reciprocating bending sections are evenly distributed on the metal wire, it is advantageous to locate the reciprocating bending section where there is a breakpoint. In summary, multiple reciprocating bending sections are evenly distributed on the metal wire, which is beneficial to locate the crack in time when the crack is detected and improve the detection efficiency.
  • the position of the reciprocating bending section A may correspond to the bisected position of the side of the non-display area 32 away from the display area 33.
  • the side B is a side of the non-display area 32 away from the display area 33, and the position of the reciprocating bending section A may correspond to the quintile position of the side B, It may also correspond to the trisection position of side B. In this way, it is helpful to locate the crack in time when the crack is detected, and improve the detection efficiency.
  • the position of the reciprocating bending section A may not correspond to the equally divided position of the side of the non-display area 32 away from the display area 33.
  • the width of the plurality of line segments may be the same.
  • the width w of the line segments 411, 412, 421, and 422 may be the same.
  • the width of the line segment may range from 2 microns to 4 microns. In this way, the preparation of metal wires can be facilitated.
  • the distance between adjacent line segments is greater than or equal to the width of the line segment.
  • the distance between adjacent line segments 411 is greater than or equal to the width of the line segment 411
  • the distance between adjacent line segments 421 is greater than or equal to the line segment 421 width.
  • the plurality of line segment groups are a first metal line segment group L1 and a third metal line segment group (not shown); the extension line of the first metal line segment group L1 in the extending direction and the third metal The extension lines of the line segment group in the extension direction intersect, and the included angle is the first included angle.
  • the second sub-section 42 is taken as an example for description below.
  • the line segments 421 in the first metal line segment group L1 and the line segments 423 in the third metal line segment group are alternately arranged and connected in sequence end to end.
  • the line segment 421 extends along the first direction X, and the first direction X may be a direction from the first side a of the display area 33 to the second side c, the first side a and the The second side c is opposite, as shown in FIG. 3.
  • the first direction X is perpendicular to the first side a, that is, parallel to the third side b and the fourth side d of the display area 33.
  • the angle between the extending direction of the line segment 423 and the first direction X is the first angle.
  • the plurality of line segment groups may be divided into three metal line segment groups or more than three metal line segment groups.
  • the plurality of line segment groups may be a first metal line segment group L1, a third metal line segment group (not shown), and a fourth metal line segment group (not shown).
  • the extending direction of the first metal line segment group L1 intersects with the extending direction of the third metal line segment group, and the included angle is the first included angle
  • the directions intersect, and the included angle is the second included angle.
  • the second sub-section 42 is taken as an example for description below.
  • the line segments 421 in the first metal line segment group L1 are alternately arranged And connected end to end.
  • the metal wire 34 may be disposed around the display area 33.
  • the metal line 34 may be provided in the non-display area 32 corresponding to the first side a, the second side c, and the third side b of the display area 33.
  • a plurality of reciprocating bending sections A may be provided in the non-display area 32 corresponding to the first side a, the second side c, and the third side b, respectively.
  • the two end points 35 and 36 of the metal wire 34 may be located on the same side of the fourth side d of the display area 33.
  • the metal wire 34 includes multiple line segments; the multiple line segments are connected in series in sequence.
  • the metal wire 34 may include a plurality of reciprocating bending sections connected in series, and the line segments in each reciprocating bending section are also connected in series in sequence.
  • the crack detection result is simple, which is helpful to improve the accuracy of crack detection and avoid the misjudgment caused by the complicated detection result.
  • the material of the metal wire 34 may be molybdenum.
  • the metal wire of this material is likely to crack as the display panel cracks, so the accuracy of crack detection can be improved.
  • the display panel 31 may include multiple inorganic layers, and the metal wires 34 may be disposed on either side of the inorganic layer between the lowermost inorganic layer and the uppermost inorganic layer.
  • the display panel 31 further includes: a driving chip (not shown).
  • the driving chip includes a high-level pin, and two end points 35, 36 of the metal wire 34 are electrically connected to the high-level pin.
  • the terminal pin of the metal wire is left floating, due to the antenna effect, it will attract surrounding charges and cause electrostatic damage to the display panel; therefore, the terminal of the metal wire is connected to the high-level pin of the driver chip, which can be avoided
  • the antenna effect prevents charge accumulation at the end of the metal wire from damaging the display panel.
  • the display panel is in an environment where various electrical signals are relatively complex, and external electrical signals may interfere with the electrical signals in the display panel.
  • the external electrical signal encounters the constant voltage high-level signal on the metal wire and will be neutralized, and the external electrical signal will merge to the constant voltage high level In the signal, the voltage of the high level appears, and the circuit environment in the display panel will become relatively quiet. Therefore, after the end point of the metal wire is connected to the high-level pin of the driver chip, it can provide a relatively quiet signal environment for the corresponding electrical signal in the display panel and prevent external electrical signal interference.
  • the two end points 35 and 36 are respectively connected to a multimeter to detect the resistance value of the metal wire 34 as a reference resistance value. After cutting the display panel or after performing the reliability test, the two end points 35 and 36 can be connected to the multimeter again to detect the resistance value of the metal wire 34 as the test resistance value.
  • the test resistance value is the same as the reference resistance value, it means that there is no break point on the metal line, and there is no crack on the display panel.
  • test resistance value When the test resistance value is greater than the reference resistance value, and the difference between the test resistance value and the reference resistance value is greater than the preset threshold, but less than infinity, it means that the metal wire is not completely broken, and there is a small crack on the display panel.
  • test resistance value When the test resistance value is infinite (for example, the test resistance value is 1M ⁇ ), it means that the metal wire is completely broken, and there is a crack on the display panel.
  • the number of the reciprocating bending section A may be plural, the specific number of the reciprocating bending section A also needs to be set according to the detection limit of the inspection machine, because if the reciprocating bending section A If the number is too much, the resistance value of the metal wire will be too large, which will result in the failure to achieve the purpose of crack detection, or lead to inaccurate detection results.
  • An embodiment of the present disclosure also proposes a display device, including a display module, and further including the display panel described in any of the above embodiments.
  • the display device may be an LTPS (Low Temperature Poly-silicon) flexible screen, but it is not limited thereto.
  • LTPS Low Temperature Poly-silicon
  • the non-display area around the display area is provided with a metal wire including a reciprocating bend section, and in the reciprocating bend section, the extending directions of at least two of the plurality of line segments of the metal wire intersect In this way, the probability of the metal wire being cut by the crack can be increased, and thus the probability of detecting the crack can be increased, so that the presence or absence of a crack on the display panel can be efficiently detected.
  • the display device provided by the embodiments of the present disclosure can not only perform crack detection in production or reliability testing, but also perform crack detection even after the product is formed, which is highly practical.
  • the display device in this embodiment may be any product or component with a display function, such as electronic paper, mobile phone, tablet computer, television, notebook computer, digital photo frame, and navigator.
  • a display function such as electronic paper, mobile phone, tablet computer, television, notebook computer, digital photo frame, and navigator.
  • first and second are used for descriptive purposes only and cannot be understood as indicating or implying relative importance.
  • plurality refers to two or more, unless expressly defined otherwise.

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Abstract

本公开涉及一种显示面板和显示装置。作为一个示例，所述显示面板包括：显示区、非显示区以及金属线。非显示区位于显示区的外周。金属线位于非显示区，金属线包括至少一个往复弯折区段。在至少一个往复弯折区段内，金属线的多个线段中的至少两个线段在延伸方向上的延长线相交。

Description

显示面板和显示装置
相关申请的交叉引用
本专利申请要求于2018年10月24日提交的、申请号为2018112446882、发明名称为“显示面板和显示装置”的中国专利申请的优先权，该申请的全文以引用的方式并入本文中。
技术领域
本公开涉及显示技术领域，尤其涉及一种显示面板和显示装置。
背景技术
相关技术中，在显示面板制造过程以及可靠性测试中，往往会令显示面板产生断裂，尤其是可弯折显示面板，断裂的风险更高。因此，为了有效防止显示面板在生产或可靠性测试过程中产生断裂，如何有效检测显示面板上的裂纹是需要解决的一个技术问题。
发明内容
本公开提供一种显示面板和显示装置，以解决相关技术中的问题。
根据本公开实施例的第一方面，提供一种显示面板，包括：
显示区；
非显示区，所述非显示区位于所述显示区的外周；和
金属线，所述金属线位于所述非显示区；所述金属线包括至少一个往复弯折区段；
其中，在所述至少一个往复弯折区段中的至少一个往复弯折区段内，所述金属线的多个线段中的至少两个线段在延伸方向上的延伸线相交。
在一个实施例中，所述多个线段可分为多个金属线段组，每个金属线段组内的线段的延伸线可平行；不同的金属线段组内的线段的延伸线可相交。
在一个实施例中，所述多个金属线段组可包括第一金属线段组与第二金属线段组；所述第一金属线段组的延伸方向可与第二金属线段组的延伸方向垂直。
在一个实施例中，所述不同的金属线段组内的线段可交替排布并且首尾顺次相连。
在一个实施例中，所述多个线段的宽度可相同。
在一个实施例中，在同一往复弯折区段内的同一金属线段组中，相邻线段之间的距离可大于或者等于所述相邻线段中每个线段的宽度。
在一个实施例中，所述至少一个往复弯折区段可包括多个往复弯折区段，且所述多个往复弯折区段依次串联。
在一个示例中，所述多个往复弯折区段可在所述金属线上均匀分布。
在一个实施例中，所述至少一个往复弯折区段中的至少一个往复弯折区段可包括第一子区段与第二子区段；所述第一子区段与所述第二子区段串联；在所述第一子区段中，沿第一方向伸展的多个线段中每个的长度小于沿第二方向伸展的多个线段中每个的长度；在所述第二子区段中，沿所述第二方向伸展的多个线段中每个的长度小于沿所述第一方向伸展的多个线段中每个的长度；其中，所述第一方向与所述第二方向相交。
在所述第一子区段中，沿所述第一方向伸展的多个线段可沿所述第二方向依次排列；沿所述第二方向伸展的多个线段可沿所述第一方向依次排列；在所述第二子区段中，沿所述第一方向伸展的多个线段可沿所述第二方向依次排列，沿所述第二方向伸展的多个线段可沿所述第一方向依次排列。
在一个实施例中，显示面板还可包括驱动芯片；所述驱动芯片包括高电平引脚；
所述金属线的至少一个端点与所述高电平引脚电连接。
在一个实施例中，所述金属线的材料可包括钼。
在一个实施例中，显示面板还可包括多层无机层，所述金属线设置在所述多层无机层中的最下层与最上层之间的任一侧无机层上。
根据本公开实施例的第二方面，提供一种显示装置，包括上述的显示面板。
在一个实施例中，显示装置还可为低温多晶硅LTPS柔性屏。
根据上述实施例可知，由于在显示区外周的非显示区设置包括往复弯折区段的金属线，且在往复弯折区段内，金属线的多个线段中的至少两个的延伸方向相交，这样，可以提高金属线被裂纹截断的概率，进而提高检测到裂纹的概率，从而可以高效地检测出显示面板上是否存在裂纹。
以上的一般描述和后文的细节描述仅是示例性和解释性的，并不能限制本公开。
附图说明
此处的附图被并入说明书中并构成本说明书的一部分，示出了符合本公开的实施例，并与说明书一起用于解释本公开的原理。
图1是根据相关技术示出的一种显示面板的结构示意图；
图2是根据相关技术示出的另一种显示面板的结构示意图；
图3是根据本公开实施例示出的一种显示面板的结构示意图；
图4是图3所示的显示面板中A部分的放大示意图；
图5是根据本公开实施例示出的主延伸方向与往复弯折方向的关系示意图；
图6是根据本公开实施例示出的一种往复弯折区段的结构示意图；
图7是根据本公开实施例示出的一种往复弯折区段的结构示意图。
具体实施方式
这里将详细地对示例性实施例进行说明，其示例表示在附图中。下面的描述涉及附图时，除非另有表示，不同附图中的相同数字表示相同或相似的要素。以下示例性实施例中所描述的实施方式并不代表与本公开相一致的所有实施方式。相反，它们仅是与如所附权利要求书中所详述的、本公开的一些方面相一致的装置和方法的例子。
相关技术中，在显示面板制造过程以及可靠性测试中，显示面板内部电路金属或其他材料(例如无机材料)由于承受应力的能力不足，往往会令显示面板产生断裂，尤其是可弯折显示面板，断裂的风险更高。因此，为了防止显示面板在生产或可靠性测试过程中产生断裂，通常在显示面板中设置裂纹检测(Panel Crack Detection，简称PCD)机制。
如图1所示，可以围绕显示面板11的显示区12设置一根金属线13，金属线13与显示区12边缘基本平行，金属线13的两端设有测点14、15，可以通过测点14、15检测金属线13的电阻来检测显示面板上是否存在裂纹。当金属线13的电阻无穷大或者比处于完好状态的金属线13的电阻大时，可确定显示面板上存在裂纹。
如图2所示，也可以在基板21上的显示区22外周的非显示区23设置金属线24，金属线24一端设有测点25，另一端通过晶体管T与测点26连接，晶体管T还与驱动 芯片27连接。其中，显示区22内设有像素组成的像素阵列，测点26通过晶体管T与像素阵列中的一列像素连接。通过测点25、26可以检测晶体管T对应的一列像素是否失控。当失控时，可以确定存在裂纹。
本公开实施例提供一种显示面板及显示装置，可以有效提高检测到裂纹的概率。
图3～图5是根据本公开实施例示出的一种显示面板31。该显示面板31包括非显示区32、显示区33以及金属线34。
如图3～图5所示，非显示区32位于所述显示区33的外周，环绕显示区33设置。金属线34位于所述非显示区32。所述金属线34包括往复弯折区段A。在所述往复弯折区段A内，所述金属线34的多个线段中的至少两个线段在延伸方向上的延伸线相交。例如，线段421沿第一方向X延伸，线段422沿第二方向Y延伸。线段421在延伸方向上的延伸线与线段422在延伸方向上的延伸线相交。线段421可以用于检测沿第二方向Y延伸的裂纹，线段422可以用于检测沿第一方向X延伸的裂纹。如果只设置沿第二方向Y延伸的金属线段，则可能会漏检沿第二方向Y延伸的裂纹。因此，与在金属线34上设置单一延伸方向的金属线段相比，在金属线34上设置不同延伸方向的金属线段，可以有效地检测出金属线被裂纹截断的事件发生，进而，可以有效提高检测到裂纹的概率，从而可以高效地检测出显示面板上是否存在裂纹。
本实施例中，由于在显示区外周的非显示区设置有包括至少一个往复弯折区段的金属线，且在该至少一个往复弯折区段中的至少一个内，金属线的多个线段中的至少两个线段在延伸方向上的延伸线相交。这样，可以提高金属线被裂纹截断的概率，进而提高检测到裂纹的概率，实现了裂纹的有效检测，提高了裂纹检测的灵敏度，从而可以高效地检测出显示面板上是否存在裂纹。
在一个实施例中，如图4所示，所述往复弯折区段A可包括第一子区段41与第二子区段42。所述第一子区段41与所述第二子区段42串联。在所述第一子区段41中，包括多个沿第一方向X延伸的线段411与多个沿第二方向Y延伸的线段412，其中，沿第一方向X延伸的线段411的长度小于沿第二方向Y延伸的线段412的长度，且多个沿第二方向Y延伸的线段412沿第一方向X依次排列。在所述第二子区段42中，包括多个沿第一方向X延伸的线段421与多个沿第二方向Y延伸的线段422。沿第二方向Y延伸的线段422的长度小于沿第一方向X延伸的线段421的长度。多个沿第一方向X延伸的线段421沿第二方向Y依次排列。所述第一方向X与所述第二方向Y相交。进一步地，所述第一方向X与所述第二方向Y垂直。由于在第一子区段41内在第二方向 Y上延伸的多个线段412较长，且沿第一方向X依次排列，因此，可以提高检测到沿第一方向X延伸的裂纹的概率，同理，第二子区段42可以提高检测沿第二方向Y延伸的裂纹的概率。综上所述，本实施例的技术方案可以有效提高检测到显示面板上在两个维度上延伸的裂纹的概率。
在一个实施例中，金属线34的所述多个线段可分为多个金属线段组，每个金属线段组内的线段的延伸方向平行；不同的金属线段组内的线段的延伸方向相交。其中，金属线段组的延伸方向为金属线段组内线段的延伸方向。在一个示例性实施例中，如图4所示，所述多个线段组可为第一金属线段组L1与第二金属线段组L2。所述第一金属线段组L1的延伸方向与第二金属线段组L2的延伸方向垂直。第一金属线段组L1可包括线段411与线段421，线段411与线段421的延伸方向为第一方向X。所述第二金属线段组L2可包括线段412与线段422，线段412与线段422的延伸方向为第二方向Y。
在一个实施例中，不同金属线段组的线段交替排布并且首尾顺次相连。如图4所示，继续上述的示例性实施例，第一金属线段组L1内的线段与第二金属线段组L2内的线段交替排布并且首尾顺次相连。具体地，在第一子区段41中，第一金属线段组L1中的线段411与第二金属线段组L2中的线段412交替排布并且首尾顺次相连。在第二子区段42中，第一金属线段组L1中的线段421与第二金属线段组L2中的线段422交替排布并且首尾顺次相连。
在一个实施例中，如图3所示，所述往复弯折区段A的数目可为多个，并且依次串联。在一个示例中，多个所述往复弯折区段A可在所述金属线34上均匀分布。这样，可以对显示面板边缘多处的裂纹进行检测。而且，当检测结果为显示面板上存在裂纹时，可以通过定位存在断点的往复弯折区段来定位裂纹。又由于多个往复弯折区段在金属线上均匀分布，因此，有利于定位存在断点的往复弯折区段。综上所述，多个往复弯折区段在金属线上均匀分布，有利于在检测到裂纹时及时定位裂纹，提高检测效率。
在一个实施例中，所述往复弯折区段A的位置可与所述非显示区32远离所述显示区33的侧边的等分位置相对应。例如，如图3所示，侧边B为所述非显示区32远离所述显示区33的一条侧边，往复弯折区段A的位置可与侧边B的五等分位置相对应，也可以与侧边B的三等分位置相对应。这样，有利于在检测到裂纹时及时定位裂纹，提高检测效率。
在实际应用时，往复弯折区段A的位置也可与所述非显示区32远离所述显示区33的侧边的等分位置不对应。
在一个实施例中，所述多个线段的宽度可相同。例如，如图4所示，线段411、412、421、422的宽度w可相同。在一个示例中，线段的宽度范围可以为2微米～4微米。这样，可便于制备金属线。
在一个实施例中，在同一往复弯折区段内的同一金属线段组中，相邻线段之间的距离大于或者等于所述线段的宽度。例如，在同一往复弯折区段A内的第一金属线段组L1中，相邻的线段411之间的距离大于或者等于线段411的宽度，相邻的线段421之间的距离大于或者等于线段421的宽度。这样，既便于制备，减小工艺难度，也可以减小相邻金属线段之间的相互影响，提高裂纹检测的准确性。
在一个实施例中，所述多个线段组为第一金属线段组L1与第三金属线段组(未示出)；所述第一金属线段组L1在延伸方向上的延伸线与第三金属线段组在延伸方向上的延伸线相交，且夹角为第一夹角。为避免内容冗余，下面以第二子区段42为例进行说明。
如图6所示，在所述第二子区段42中，第一金属线段组L1中的线段421与第三金属线段组中的线段423交替排布并且首尾顺次相连。线段421沿所述第一方向X延伸，所述第一方向X可以为由所述显示区33的第一侧边a指向第二侧边c的方向，所述第一侧边a与所述第二侧边c相对，如图3所示。在本实施例中，第一方向X垂直于第一侧边a，也就是平行于显示区33的第三侧边b与第四侧边d。线段423的延伸方向与第一方向X之间的夹角为第一夹角。
在实际应用中，所述多个线段组可被分为三个金属线段组或者三个以上的金属线段组。在一个实施例中，所述多个线段组可为第一金属线段组L1、第三金属线段组(未示出)以及第四金属线段组(未示出)。所述第一金属线段组L1的延伸方向与第三金属线段组的延伸方向相交，且夹角为第一夹角，所述第一金属线段组L1的延伸方向与第四金属线段组的延伸方向相交，且夹角为第二夹角。为避免内容冗余，下面以第二子区段42为例进行说明。
如图7所示，在所述第二子区段42中，第一金属线段组L1中的线段421、第三金属线段组中的线段423以及第四金属线段组中的线段424交替排布并且首尾顺次相连。
在一个实施例中，如图3所示，金属线34可环绕所述显示区33设置。其中，可在显示区33的第一侧边a、第二侧边c、第三侧边b对应的非显示区32设置所述金属线34。第一侧边a、第二侧边c、第三侧边b各自对应的非显示区32内可以分别设置多个 往复弯折区段A。金属线34的两个端点35、36可同位于所述显示区33的第四侧边d的一侧。
在本公开实施例中，如图3～图4所示，所述金属线34包括多个线段；所述多个线段之间依次串联。具体地，金属线34可包括多个依次串联的往复弯折区段，每个往复弯折区段内的线段也依次串联。在本实施例中，不但金属线布线简单，易于制备，而且，使得裂纹检测结果简单，有利于提高裂纹检测的正确率，避免因检测结果复杂引入的误判。
在一个实施例中，所述金属线34的材料可为钼。当在显示面板上制备的金属线的材料为钼时，这种材料的金属线容易随着显示面板产生裂纹而发生裂纹，因此，可以提高裂纹检测的准确性。
在一个实施例中，显示面板31可包括多层无机层，金属线34可设置在最下层的无机层与最上层的无机层之间的任意一侧无机层上。
在一个实施例中，显示面板31还包括：驱动芯片(未示出)。所述驱动芯片包括高电平引脚，所述金属线34的两个端点35、36与所述高电平引脚电连接。一方面，金属线的端点引脚悬空后，由于天线效应，会吸引周围的电荷，对显示面板造成静电击伤；因此，金属线的端点连接在驱动芯片的高电平引脚上，可以避免天线效应，防止在金属线的端点处电荷积累击伤显示面板。另一方面，显示面板处于各种电信号比较复杂的环境中，外界电信号会对显示面板内的电信号产生干扰。因此，金属线的端点连接在驱动芯片的高电平引脚上后，外界电信号遇到金属线上的恒压高电平信号会被中和，外界电信号会融合到恒压高电平信号中去，呈现高电平的电压，显示面板内的电路环境会变得相对安静。所以，金属线的端点连接在驱动芯片的高电平引脚上后，可以为显示面板内相应的电信号提供相对安静的信号环境，防止外部电信号干扰。
当检测上述显示面板31上的裂纹时，可以通过检测金属线34的电阻值来检测显示面板上是否存在裂纹。具体地，可以在对显示面板进行切割或者进行可靠性测试前，将两个端点35、36分别接入万用表，检测金属线34的电阻值，作为参考电阻值。在对显示面板进行切割后或者在进行可靠性测试后，可以再次将两个端点35、36分别接入万用表，检测金属线34的电阻值，作为测试电阻值。当测试电阻值与参考电阻值相同时，表示金属线上不存在断点，显示面板上不存在裂纹。当测试电阻值比参考电阻值大，且测试电阻值与参考电阻值的差值大于预设阈值，但小于无穷大时，表示金属线未完全断裂，显示面板上存在细小裂纹。当测试电阻值为无穷大(比如测试电阻值为1MΩ)时， 表示金属线完全断裂，显示面板上存在裂纹。
在本公开中，虽然往复弯折区段A的数目可以为多个，但是，往复弯折区段A的具体数目还需要根据检测机台的检测极限设置，因为，如果往复弯折区段A的数目过多，会导致金属线的电阻值过大，进而导致不能实现裂纹检测的目的，或者导致检测结果不准确。
本公开的实施例还提出了一种显示装置，包括显示模组，还包括上述任一实施例所述的显示面板。
在一个实施例中，显示装置可以是LTPS(Low Temperature Poly-silicon，低温多晶硅)柔性屏，但不限于此。
本实施例中，由于在显示区外周的非显示区设置包括往复弯折区段的金属线，且在往复弯折区段内，金属线的多个线段中的至少两个的延伸方向相交，这样，可以提高金属线被裂纹截断的概率，进而提高检测到裂纹的概率，从而可以高效地检测出显示面板上是否存在裂纹。
本公开实施例提供的显示装置，不仅可以在生产或可靠性测试中进行裂纹检测，即使在形成产品后也可以进行裂纹检测，实用性强。
本实施例中的显示装置可以为：电子纸、手机、平板电脑、电视机、笔记本电脑、数码相框、导航仪等任何具有显示功能的产品或部件。
在本公开的附图中，为了图示的清晰可能夸大了层和区域的尺寸。当元件或层被称为在另一元件或层“上”时，它可以直接在其他元件上，或者可以存在中间的层。另外，当元件或层被称为在另一元件或层“下”时，它可以直接在其他元件下，或者可以存在一个以上的中间的层或元件。另外，当层或元件被称为在两层或两个元件“之间”时，它可以为两层或两个元件之间唯一的层，或还可以存在一个以上的中间层或元件。通篇相似的参考标记指示相似的元件。
在本公开中，术语“第一”、“第二”仅用于描述目的，而不能理解为指示或暗示相对重要性。术语“多个”指两个或两个以上，除非另有明确的限定。
本领域技术人员在考虑说明书及实践这里公开的公开后，将容易想到本公开的其它实施方案。本公开旨在涵盖本公开的任何变型、用途或者适应性变化，这些变型、用途或者适应性变化遵循本公开的一般性原理并包括本公开未公开的本技术领域中的公知常识或惯用技术手段。说明书和实施例仅被视为示例性的，本公开的真正范围和精神由 下面的权利要求指出。

Claims (15)

  1. 一种显示面板，其中，包括：
    显示区；
    非显示区，所述非显示区位于所述显示区的外周；和
    金属线，所述金属线位于所述非显示区；所述金属线包括至少一个往复弯折区段；
    其中，在所述至少一个往复弯折区段中的至少一个往复弯折区段内，所述金属线的多个线段中的至少两个线段在延伸方向上的延伸线相交。
  2. 根据权利要求1所述的显示面板，其中，所述多个线段分为多个金属线段组，每个金属线段组内的线段的延伸线平行；
    不同的金属线段组内的线段的延伸线相交。
  3. 根据权利要求2所述的显示面板，其中，所述多个金属线段组包括第一金属线段组与第二金属线段组；
    所述第一金属线段组的延伸方向与第二金属线段组的延伸方向垂直。
  4. 根据权利要求2或3所述的显示面板，其中，所述不同的金属线段组内的线段交替排布并且首尾顺次相连。
  5. 根据权利要求1-3中任一项所述的显示面板，其中，所述多个线段的宽度相同。
  6. 根据权利要求5所述的显示面板，其中，在同一往复弯折区段内的同一金属线段组中，相邻线段之间的距离大于或者等于所述相邻线段中每个线段的宽度。
  7. 根据权利要求1所述的显示面板，其中，所述至少一个往复弯折区段包括多个往复弯折区段，并且所述多个往复弯折区段依次串联。
  8. 根据权利要求7所述的显示面板，其中，所述多个往复弯折区段在所述金属线上均匀分布。
  9. 根据权利要求1所述的显示面板，其中，所述至少一个往复弯折区段中的至少一个往复弯折区段包括第一子区段与第二子区段；所述第一子区段与所述第二子区段串联；
    在所述第一子区段中，沿第一方向伸展的多个线段中每个的长度小于沿第二方向伸展的多个线段中每个的长度；
    在所述第二子区段中，沿所述第二方向伸展的多个线段中每个的长度小于沿所述第一方向伸展的多个线段中每个的长度；
    其中，所述第一方向与所述第二方向相交。
  10. 根据权利要求9所述的显示面板，其中，
    在所述第一子区段中，沿所述第一方向伸展的多个线段沿所述第二方向依次排列；沿所述第二方向伸展的多个线段沿所述第一方向依次排列；
    在所述第二子区段中，沿所述第一方向伸展的多个线段沿所述第二方向依次排列，沿所述第二方向伸展的多个线段沿所述第一方向依次排列。
  11. 根据权利要求1所述的显示面板，其中，还包括驱动芯片，所述驱动芯片包括高电平引脚；
    所述金属线的至少一个端点与所述高电平引脚电连接。
  12. 根据权利要求1所述的显示面板，其中，所述金属线的材料包括钼。
  13. 根据权利要求1所述的显示面板，其中，还包括多层无机层，所述金属线设置在所述多层无机层中的最下层与最上层之间的任一侧无机层上。
  14. 一种显示装置，其中，包括权利要求1～13任一项所述的显示面板。
  15. 根据权利要求14所述的显示装置，其中，所述显示装置为低温多晶硅LTPS柔性屏。
PCT/CN2019/076510 2018-10-24 2019-02-28 显示面板和显示装置 WO2020082657A1 (zh)

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