WO2020191869A1 - 一种显示面板 - Google Patents

一种显示面板 Download PDF

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Publication number
WO2020191869A1
WO2020191869A1 PCT/CN2019/086255 CN2019086255W WO2020191869A1 WO 2020191869 A1 WO2020191869 A1 WO 2020191869A1 CN 2019086255 W CN2019086255 W CN 2019086255W WO 2020191869 A1 WO2020191869 A1 WO 2020191869A1
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WO
WIPO (PCT)
Prior art keywords
metal
display panel
blocks
block
signal line
Prior art date
Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
Ceased
Application number
PCT/CN2019/086255
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English (en)
French (fr)
Inventor
吴绍静
Current Assignee (The listed assignees may be inaccurate. Google has not performed a legal analysis and makes no representation or warranty as to the accuracy of the list.)
Wuhan China Star Optoelectronics Semiconductor Display Technology Co Ltd
Original Assignee
Wuhan China Star Optoelectronics Semiconductor Display Technology Co Ltd
Priority date (The priority date is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the date listed.)
Filing date
Publication date
Application filed by Wuhan China Star Optoelectronics Semiconductor Display Technology Co Ltd filed Critical Wuhan China Star Optoelectronics Semiconductor Display Technology Co Ltd
Priority to US16/615,289 priority Critical patent/US11062630B2/en
Publication of WO2020191869A1 publication Critical patent/WO2020191869A1/zh
Anticipated expiration legal-status Critical
Ceased legal-status Critical Current

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Classifications

    • G—PHYSICS
    • G09—EDUCATION; CRYPTOGRAPHY; DISPLAY; ADVERTISING; SEALS
    • G09G—ARRANGEMENTS OR CIRCUITS FOR CONTROL OF INDICATING DEVICES USING STATIC MEANS TO PRESENT VARIABLE INFORMATION
    • G09G3/00—Control arrangements or circuits, of interest only in connection with visual indicators other than cathode-ray tubes
    • G09G3/006—Electronic inspection or testing of displays and display drivers, e.g. of LED or LCD displays
    • G—PHYSICS
    • G09—EDUCATION; CRYPTOGRAPHY; DISPLAY; ADVERTISING; SEALS
    • G09G—ARRANGEMENTS OR CIRCUITS FOR CONTROL OF INDICATING DEVICES USING STATIC MEANS TO PRESENT VARIABLE INFORMATION
    • G09G2300/00—Aspects of the constitution of display devices
    • G09G2300/04—Structural and physical details of display devices
    • G09G2300/0421—Structural details of the set of electrodes
    • G09G2300/0426—Layout of electrodes and connections
    • G—PHYSICS
    • G09—EDUCATION; CRYPTOGRAPHY; DISPLAY; ADVERTISING; SEALS
    • G09G—ARRANGEMENTS OR CIRCUITS FOR CONTROL OF INDICATING DEVICES USING STATIC MEANS TO PRESENT VARIABLE INFORMATION
    • G09G2330/00—Aspects of power supply; Aspects of display protection and defect management
    • G09G2330/12—Test circuits or failure detection circuits included in a display system, as permanent part thereof

Definitions

  • This application relates to the field of display technology, and in particular to a display panel.
  • Flat Plate Display FPD Fluorescent Plate Display
  • the production process of flat panel displays involves the process of cutting the display panel from the glass on which the functional layer is deposited.
  • cracks are prone to occur near the cutting path. If the cracks extend to the inside of the display panel (effective display area), the functional film may be damaged, thereby affecting the display quality.
  • crack protection is performed inside the cutting path. stop) design to prevent crack extension.
  • the current crack protection design is mostly based on the inorganic layer trenching design, which will have the problem of poor crack protection effect.
  • the crack detection circuit part is designed, which is not conducive to the design of the narrow frame display panel.
  • the present application provides a display panel, which can solve the problems that cracks generated during cutting of the display panel cause damage to the surface and the cracks cannot be monitored in time.
  • the present application provides a display panel, which includes a display area and a crack protection area arranged around the display area, and a cutting channel is arranged on the periphery of the crack protection area;
  • the display panel further includes a monitoring circuit, the monitoring circuit is used to monitor the condition of the cracks generated in the cutting path when the cutting path is cut;
  • the crack protection area is provided with a metal signal line surrounding the display area and electrically connected to the monitoring circuit, the shape of the orthographic projection of the metal signal line on the display panel is curved, and the metal
  • the signal line includes a first metal layer and a second metal layer electrically connected to the first metal layer through a via hole. The first metal layer and/or the second metal layer are used to block the cutting of the display panel. The generated cracks extend to the display area.
  • the first metal layer includes first metal blocks distributed at intervals
  • the second metal layer includes second metal blocks distributed at intervals.
  • the second metal blocks are all arranged along the crack protection area around the display area.
  • the first metal blocks in two adjacent rows/columns are arranged in a staggered arrangement, and the distance between two adjacent first metal blocks is smaller than that of the first metal blocks. Length, the second metal blocks are distributed in an array.
  • one second metal block connects two adjacent and staggered first metal blocks, and the second metal blocks in the same row/column are adjacent to each other through the via holes.
  • the first metal blocks in two rows/columns are electrically connected to form one metal signal line.
  • the shapes of the first metal block and the second metal block are both rectangular, and the first metal block and the second metal block are in the shape of bars or blocks ⁇ distribution.
  • the first metal blocks in two adjacent rows/columns are arranged in a staggered arrangement, and the distance between two adjacent first metal blocks is smaller than that of the first metal blocks.
  • Length; two adjacent rows/columns of the second metal blocks are arranged in a staggered arrangement, and the distance between two adjacent second metal blocks is smaller than the length of the second metal blocks.
  • one of the second metal blocks is correspondingly arranged at a gap position between two adjacent first metal blocks, so that one row/column of the second metal blocks passes through the
  • the via holes are correspondingly connected to one row/column of the first metal blocks to form the metal signal line.
  • the shapes of the first metal block and the second metal block are both U-shaped, and the U-shaped openings of the first metal block and the second metal block It is arranged in a reverse direction, so that the shape of the orthographic projection of the metal signal line on the display panel is curved.
  • the metal signal line is electrically connected to the monitoring circuit via a metal wiring, and the metal signal line is used to connect a constant voltage high-level signal/constant voltage low-level signal.
  • the monitoring circuit is also used to monitor the constant voltage high-level signal/the constant voltage low-level signal through the metal signal line, wherein the monitoring circuit responds to the constant voltage high-level signal/the constant voltage
  • the monitoring result of the low-level signal corresponds to whether the cutting line has abnormal cracks.
  • the present application also provides a display panel, including a display area and a crack protection area arranged around the display area, and a cutting channel is provided on the periphery of the crack protection area;
  • the display panel further includes a monitoring circuit, the monitoring circuit is used to monitor the condition of the cracks generated in the cutting path when the cutting path is cut;
  • the crack protection area is provided with a metal signal line surrounding the display area and electrically connected to the monitoring circuit, the metal signal line includes a first metal layer and is electrically connected to the first metal layer through a via hole
  • the second metal layer, the first metal layer and/or the second metal layer is used to block the cracks generated when the display panel is cut from extending to the display area.
  • the first metal layer includes first metal blocks distributed at intervals
  • the second metal layer includes second metal blocks distributed at intervals.
  • the second metal blocks are all arranged along the crack protection area around the display area.
  • the first metal blocks in two adjacent rows/columns are arranged in a staggered arrangement, and the distance between two adjacent first metal blocks is smaller than that of the first metal blocks. Length, the second metal blocks are distributed in an array.
  • one second metal block connects two adjacent and staggered first metal blocks, and the second metal blocks in the same row/column are adjacent to each other through the via holes.
  • the first metal blocks in two rows/columns are electrically connected to form one metal signal line.
  • the shapes of the first metal block and the second metal block are both rectangular, and the first metal block and the second metal block are in the shape of bars or blocks ⁇ distribution.
  • the first metal blocks in two adjacent rows/columns are arranged in a staggered arrangement, and the distance between two adjacent first metal blocks is smaller than that of the first metal blocks.
  • Length; two adjacent rows/columns of the second metal blocks are arranged in a staggered arrangement, and the distance between two adjacent second metal blocks is smaller than the length of the second metal blocks.
  • one of the second metal blocks is correspondingly arranged at a gap position between two adjacent first metal blocks, so that one row/column of the second metal blocks passes through the
  • the via holes are correspondingly connected to one row/column of the first metal blocks to form the metal signal line.
  • the shapes of the first metal block and the second metal block are both U-shaped, and the U-shaped openings of the first metal block and the second metal block The setting is reversed.
  • the metal signal line is electrically connected to the monitoring circuit via a metal wiring, and the metal signal line is used to connect a constant voltage high-level signal/constant voltage low-level signal.
  • the monitoring circuit is also used to monitor the constant voltage high-level signal/the constant voltage low-level signal through the metal signal line, wherein the monitoring circuit responds to the constant voltage high-level signal/the constant voltage
  • the monitoring result of the low-level signal corresponds to whether the cutting line has abnormal cracks.
  • the beneficial effects of the present application are: compared with the existing display panel, the display panel provided by the present application is provided with a crack protection zone surrounding the display area inside the cutting path of the display panel, and a double layer is prepared in the crack protection zone
  • the metal signal line formed by metal matching, through the design of the double-layer metal structure and arrangement, so that the formed metal signal line can not only prevent the cracks generated when the display panel is cut from extending inward, but also the metal signal line It is also connected to the monitoring circuit of the display panel to form real-time monitoring of the abnormality of the crack in the cutting line; in addition, it is also beneficial to realize the narrow frame of the display panel.
  • FIG. 1 is a top view of a display panel provided by an embodiment of the application
  • FIG. 2 is a partial schematic diagram of the first metal layer of the crack protection area of the display panel provided in the first embodiment of the application;
  • FIG. 3 is a partial schematic diagram of a metal signal line in a crack protection area of a display panel provided by Embodiment 1 of the application;
  • FIG. 4 is a schematic diagram of a film cross-section of the crack protection area shown in FIG. 3 in a direction perpendicular to the metal signal line;
  • FIG. 5 is a schematic cross-sectional view of the film layer of the crack protection zone shown in FIG. 3 in a direction parallel to the metal signal line;
  • FIG. 6 is a schematic cross-sectional view of a display panel provided by Embodiment 1 of the application.
  • FIG. 7 is a schematic plan view of crack monitoring of a display panel provided by an embodiment of the application.
  • FIG. 8 is a partial schematic diagram of the first metal layer of the crack protection area of the display panel provided in the second embodiment of the application;
  • FIG. 9 is a partial schematic diagram of the second metal layer of the crack protection area of the display panel provided by the second embodiment of the application.
  • FIG. 10 is a partial schematic diagram of a metal signal line in a crack protection area of a display panel provided by the second embodiment of the application;
  • FIG. 11 is a schematic cross-sectional view of the film layer of the crack protection zone shown in FIG. 10 in a direction parallel to the metal signal line;
  • FIG. 12 is a schematic cross-sectional view of the film layer of the crack protection zone shown in FIG. 10 in a direction perpendicular to the metal signal line;
  • FIG. 13 is a schematic cross-sectional view of a display panel provided by Embodiment 2 of the application.
  • FIG. 14 is a schematic cross-sectional view of the film layer of the crack protection area of the display panel provided in the third embodiment of the application in a direction parallel to the metal signal line;
  • 15 is a schematic cross-sectional view of the film layer of the crack protection area of the display panel provided in the third embodiment of the application in the direction perpendicular to the metal signal line;
  • FIG. 16 is a schematic cross-sectional view of a display panel provided in Embodiment 3 of the application.
  • the present application is directed to the existing display panel, and there are technical problems that the cracks generated in the cutting process cause damage to the plane and the cracks cannot be monitored in time. This embodiment can solve the defects.
  • FIG. 1 it is a top view of a display panel provided by an embodiment of this application.
  • the display panel includes a display area 010, a cutting track 012 arranged around the display area 010, and a crack protection area 011 located between the display area 010 and the cutting track 012, and the crack protection area 011 surrounds
  • the display area 010 is set in a circle.
  • a cutting knife cuts the display panel along the cutting path 012, and the crack protection area 011 is used to block cracks generated at the edge of the display panel during the cutting process.
  • the display area 010 extends.
  • the display panel also includes a monitoring circuit (shown as 072 in FIG. 7), and the monitoring circuit is used to monitor the condition of the cracks generated in the cutting bead 012 when the cutting bead 012 is cut.
  • the crack protection area 011 is provided with a metal signal line (shown as 101 in FIG. 3) arranged around the display area 010, and the metal signal line passes through the via hole on the insulating layer and the second metal layer from the first metal layer.
  • the metal layer is formed by electrical connection. Wherein, the first metal layer and/or the second metal layer in the crack protection area 011 is used to block the cracks generated when the display panel is cut from extending into the display area 010.
  • the first metal layer includes a first metal block 135 and a first metal block 135' that are independent and interlaced with each other, and one row/column of the first metal block 135 and One row/column of the first metal blocks 135' are adjacent and alternately arranged, and the distance between two adjacent first metal blocks 135 (135') is smaller than that of the first metal blocks 135' (135 )length.
  • the first metal block 135 (135') is arranged along the crack protection area 011 around the display area 010.
  • the second metal layer includes second metal blocks 136 that are independent of each other and distributed in an array, and the second metal blocks 136 are arranged along the crack protection area 011 around the display area 010.
  • a second metal block 136 is connected to two adjacent and staggered first metal blocks through a via hole, that is, two ends of a second metal block 136 are electrically connected to a first The metal block 135 and the first metal block 135'.
  • the second metal blocks 136 in the same row/column are connected to the adjacent row/column of the first metal blocks 135 and the row/column of the first metal blocks 135' through the via holes, Thus, a metal signal line 101 is formed.
  • One or more metal signal lines 101 may be provided in the crack protection area 011.
  • the shapes of the first metal block 135 (135') and the second metal block 136 are both rectangular, but it is not limited thereto. And the first metal blocks 135 (135') and the second metal blocks 136 are distributed in strips or blocks, and the shape of the orthographic projection of the metal signal line 101 on the display panel is Curvilinear.
  • first metal block 135 is terminated. Part of the crack 150 extends to the first metal block 135', and ends when it encounters the first metal block 135'. Since the first metal blocks 135 and the first metal blocks 135' are arranged in a staggered arrangement, the path of the crack 150 will be terminated, effectively preventing the crack 150 from extending. It should be noted here that there is no essential difference between the first metal blocks 135 and the first metal blocks 135', and they are only arranged in a staggered manner.
  • FIG. 4 is a schematic cross-sectional view of the film layer of the crack protection area shown in FIG. 3 in a direction perpendicular to the metal signal line.
  • the display panel includes a substrate 121, and the substrate 121 includes a flexible layer, a buffer layer, and the like.
  • a first insulating layer 122 is also prepared on the substrate 121, and the first insulating layer 122 may be a first gate insulating layer.
  • a first metal layer is prepared on the first insulating layer 122. After the first metal layer is patterned, the first metal blocks 135 (135') distributed at intervals are formed.
  • the first metal layer may be a first metal layer.
  • a gate metal layer is a gate metal layer.
  • the second insulating layer 123 is prepared on the first metal layer, and the second insulating layer 123 may be a second gate insulating layer (if the second metal layer is a second gate metal layer), or the The second insulating layer 123 may be an interlayer insulating layer (if the second metal layer is a source-drain metal layer).
  • the second metal layer is used as a source-drain metal layer for description, wherein the second insulating layer A via hole exposing part of the first metal layer is prepared on 123.
  • the second metal layer is prepared on the second insulating layer 123, and after patterning, a second metal pattern 136 is formed, and a planarization layer 124 is formed on the second metal pattern 136.
  • first metal blocks 135 and the first metal blocks 135' are arranged adjacently and staggered in a positional relationship, and the second metal blocks 136 are arranged in a direction perpendicular to the metal signal line 101
  • the via holes on the second insulating layer 123 are respectively overlapped with the first metal block 135 and the first metal block 135' to connect the first metal block 135 and the first metal block 135
  • a metal pattern 135' is alternately connected to form the metal signal line 101.
  • FIG. 5 is a schematic cross-sectional view of the film layer of the crack protection zone shown in FIG. 3 in a direction parallel to the metal signal line.
  • the figure is a schematic cross-sectional view of the first metal block 135 in the same row/column.
  • the cross-sectional view of the first metal block 135' is similar to it, except that the positional relationship is staggered.
  • FIG. 6 is a schematic cross-sectional view of a display panel provided by Embodiment 1 of the application.
  • the crack protection area 011 On the left side of the boundary line 191 is the crack protection area 011, and on the right side of the boundary line 191 is the functional area of the display panel (including the GOA area and the display area 010).
  • a semiconductor active layer 134 is also prepared on the substrate 121.
  • a gate is also formed at the same time.
  • a source is also formed at the same time. Drain.
  • the first metal block 135 and the first metal block 135' will prevent the crack 150 from extending to the display area . Since the first metal blocks 135 and the first metal blocks 135' are arranged alternately, the extension path of the crack 150 will be greatly increased. This design can greatly reduce the extension of the crack 150 to the display area. probability.
  • FIG. 7 is a schematic plan view of the display panel crack monitoring provided by the embodiment of the application
  • the different metal signal lines are wound around the display area 010 in the crack protection area 011 and connected into one
  • the signal line becomes the crack monitoring line.
  • a monitoring circuit 072 is provided on one side of the display area 010, and the monitoring circuit 072 is located between the display area 010 and the crack protection area 011.
  • the metal signal line in the crack protection zone 011 is electrically connected to the monitoring circuit 072 via a metal trace 071, and the metal signal line is connected to a constant voltage high level signal/constant voltage through the metal trace 071 Low level signal 073, the monitoring circuit 072 is also used to monitor the constant voltage high level signal/constant voltage low level signal 073 through the metal signal line, wherein the monitoring circuit 072 is for the constant voltage
  • the monitoring result of the high-level signal/constant-voltage low-level signal 073 corresponds to whether there is an abnormal crack in the cutting line 012.
  • the cutting line 012 has no abnormal cracks; otherwise, The cutting line 012 has a crack abnormality.
  • the metal signal line around the display area 010 is not broken, and can transmit the constant voltage high level signal/constant voltage low level signal Signal 073, the monitoring circuit 072 can detect the constant voltage high level signal/constant voltage low level signal 073, and there will be no abnormality during the light emitting test of the display panel.
  • the constant voltage high level signal/constant voltage low level signal 073 cannot be normally transmitted on the metal signal line, and the monitoring circuit 072 cannot detect the Constant voltage high-level signal/constant voltage low-level signal 073, in a specific light-emitting test mode (such as testing the red screen), at the position where the monitoring circuit 072 is connected to the metal trace 071, the screen will display an abnormality. If bright lines/dark lines 074 appear in the display area 010 as shown in the figure, it can be determined that a serious crack has occurred, and the purpose of crack monitoring is achieved.
  • the display panel of the present application can not only block the cracks generated during cutting from extending in the plane, but also can monitor the crack abnormality of the cutting bead in real time; in addition, because the monitoring circuit of the present application is simple, there are It is helpful to realize the narrow frame of the display panel.
  • FIG. 8 is a partial schematic diagram of the first metal layer of the crack protection area of the display panel provided in the second embodiment of the application.
  • the first metal layer includes a first metal block 235 and a first metal block 235' that are independent and interlaced with each other, one row/column of the first metal block 235 and one row/column
  • the first metal blocks 235' are adjacently arranged in a staggered manner, and the distance between two adjacent first metal blocks 235 (235') is smaller than the length of the first metal blocks 235' (235).
  • the second metal layer includes a second metal block 236 and a second metal block 236' that are independent and interlaced with each other, one row/column of the second metal block 236 and one row/column
  • the second metal blocks 236' are adjacent and staggered in positional relationship, and the distance between two adjacent second metal blocks 236 (236') is smaller than that of the second metal blocks 236' (236 )length.
  • the first metal block 235 (235') and the second metal block 236 (236') are both arranged along the crack protection area 011 around the display area 010.
  • one of the second metal blocks 236 (236') is correspondingly disposed at the gap between two adjacent first metal blocks 235 (235'), so that the row/column of the The second metal block 236 (236') is correspondingly connected to the first metal block 235 (235') in one row/column through the via hole to form the metal signal line 201.
  • the shapes of the first metal block 235 (235') and the second metal block 236 (236') are both U-shaped, but not limited to this. Moreover, the U-shaped openings of the first metal block 235 (235') and the second metal block 236 (236') are arranged in opposite directions, so that the metal signal line 201 is positioned on the display panel. The shape of the projection is curved.
  • the crack 250 When a crack 250 is generated near the cutting lane 212, the crack 250 will extend to the inside of the panel. When the crack 250 encounters the first metal block 235 (235'), it will stop extending. Because the first metal block 235 and the first metal block 235' are arranged alternately, the crack The extension path of the 250 is greatly increased, thereby reducing the chance of cracks in the panel. Similarly, when the crack 250 encounters the second metal block 236 (236'), it will stop extending. Because the second metal block 236 and the second metal block 236' are staggered, the The extension path of the crack 250 will also be greatly increased.
  • the second metal block 236 overlaps two adjacent first metal blocks 235, and the second metal block 236' overlaps two adjacent first metal blocks 235.
  • the blocks 235' are overlapped to form at least two metal signal lines 201. It should be noted here that there is no essential difference between the first metal block 235 and the first metal block 235', and the second metal block 236 and the second metal block 236'. It is staggered.
  • the display panel includes a substrate 221, and the substrate 221 includes a flexible layer, a buffer layer, and the like.
  • the substrate 221 includes a flexible layer, a buffer layer, and the like.
  • a first insulating layer 222, a first metal layer (235, 235'), a second insulating layer 223, a second metal layer (236, 236'), a planarization layer 224, etc. are sequentially prepared.
  • first metal block 235 and the first metal block 235' are arranged adjacently and staggered in a positional relationship
  • the second metal block 236 and the second metal block 236' are arranged Adjacent and staggered in position.
  • the second metal block 236 overlaps two adjacent first metal blocks 235 in a direction parallel to the metal signal line 201 to form the The metal signal line 201; the second metal block 236' overlaps two adjacent second metal blocks 235' in a direction parallel to the metal signal line 201 to form the metal signal line 201.
  • the first metal blocks 235 (235') and the second metal blocks 236 (236') are alternately arranged, and the first A metal block 235 is adjacent to the first metal block 235' and arranged alternately, and the second metal block 236 is adjacent to the second metal block 236' and arranged alternately.
  • FIG. 13 it is a schematic cross-sectional view of the display panel provided in the second embodiment of this application.
  • the crack protection area 011 On the left side of the boundary line 291 is the crack protection area 011, and on the right side of the boundary line 291 is the functional area of the display panel (including the GOA area and the display area 010).
  • a semiconductor active layer 234 is also prepared on the substrate 221.
  • a gate is also formed at the same time.
  • a source is also formed at the same time. Drain.
  • the second metal block 236 and the second metal block 236' will also prevent the crack 250 from extending to the display area. Since the first metal block 235 and the first metal block 235', and the second metal block 236 and the second metal block 236' are all arranged in a staggered arrangement, the crack 250 The extension path will be greatly increased, thereby greatly reducing the probability of the crack 250 extending to the display area.
  • the crack monitoring method of the display panel provided in the second embodiment of the present application is the same as the crack monitoring method in the above embodiment 1.
  • FIGS. 14 to 16 are schematic cross-sectional views of the display panel provided in the third embodiment of this application.
  • the third embodiment is a further improvement on the basis of the above-mentioned second embodiment.
  • the schematic plan view of the display panel provided in the third embodiment can refer to FIGS. 8-10, and the first metal layer (335, 335') and the second The metal layers (336, 336') are respectively arranged in a staggered pattern, which will not be repeated here.
  • the display panel includes a substrate 321, and a first insulating layer 322, a first metal layer (335, 335'), a second insulating layer 323, The second metal layer (336, 336'), the planarization layer 324, etc.
  • the first metal layer forms first metal blocks 335 and first metal blocks 335' that are staggered
  • the second metal layer forms second metal blocks 336 and second metal blocks 336' that are staggered.
  • the second metal block 336 overlaps two adjacent first metal blocks 335 in a direction parallel to the metal signal line (201 in FIG. 10) , Forming the metal signal line; the second metal block 336' overlaps two adjacent first metal blocks 335' in a direction parallel to the metal signal line to form the metal signal line .
  • the first metal block 335 (335') and the second metal block 336 (336') ) Staggered arrangement the first metal blocks 335 and the first metal blocks 335' are adjacent and staggered, and the second metal blocks 336 and the second metal blocks 336' are adjacent and staggered Set up.
  • first metal layer (335, 335') is directly prepared on the substrate 321 through a hole in the first insulating layer 322, which is different from cutting
  • the conditions of the film layer near the channel 312 are the same. If the first insulating layer 322 produces a crack 350 when the display panel is cut, the first metal layer (335, 335') can also prevent the crack 350 from extending. The crack protection effect of the display panel is better.
  • FIG. 16 it is a schematic cross-sectional view of the display panel provided in the third embodiment of this application.
  • the crack protection area 011 on the left side of the boundary line 391 is the crack protection area 011
  • the functional area of the display panel on the right side of the boundary line 391 is the functional area of the display panel (including the GOA area and the display area 010).
  • a semiconductor active layer 334 is also prepared on the substrate 321. After the first metal layer is patterned, a gate is also formed at the same time. After the second metal layer is patterned, a source is also formed at the same time. Drain.
  • the first metal block 335 and the first metal block 335' will prevent the crack 350 from extending to the display area .
  • the second metal block 336 and the second metal block 336' will also prevent the crack 350 from extending to the display area. With this staggered arrangement, the extension path of the crack 350 will be greatly increased, so that the probability of the crack 350 extending to the display area can be greatly reduced.
  • the crack monitoring method of the display panel provided in the third embodiment of the present application is the same as the crack monitoring method in the foregoing embodiment 1.
  • a crack protection zone surrounding the display area is arranged inside the cutting path of the display panel, and a metal signal line formed by a double-layer metal matching is prepared in the crack protection zone.
  • the structure and arrangement of the double-layer metal are designed so that the formed metal signal line can not only block the cracks generated when the display panel is cut from extending inward, but also the metal signal line is connected to the monitor circuit of the display panel to form a pair Real-time monitoring of cracks in the cutting lane; in addition, it is also conducive to achieving a narrow frame of the display panel.

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  • Engineering & Computer Science (AREA)
  • Physics & Mathematics (AREA)
  • Computer Hardware Design (AREA)
  • General Physics & Mathematics (AREA)
  • Theoretical Computer Science (AREA)
  • Devices For Indicating Variable Information By Combining Individual Elements (AREA)

Abstract

本申请提供一种显示面板，包括显示区及显示区外围的裂纹防护区，裂纹防护区外围设有切割道；显示面板还包括监测电路，用于监测显示面板切割时切割道所产生裂纹的情况；裂纹防护区内设置有环绕显示区并电连接监测电路的金属信号线，金属信号线由双层金属电连接形成，金属信号线用于阻挡裂纹向显示区延伸。

Description

一种显示面板 技术领域
本申请涉及显示技术领域，尤其涉及一种显示面板。
 背景技术
平板显示器FPD（Flat Plate Display）已逐渐成为人们工作学习中不可或缺的工具，平板显示器的制作过程中，涉及到显示面板从蒸镀了功能层的玻璃上切割下来的过程，目前面板行业中存在多次切割的工艺，得到最后的显示面板。切割过程中在切割道附近容易产生裂纹（crack），若裂纹延伸至显示面板内部（有效显示区域），可能会破坏功能膜层，从而影响显示质量，通常会在切割道内侧进行裂纹防护（crack stop）设计，防止裂纹的延伸。目前裂纹防护设计多以无机层挖槽设计为主，会存在裂纹防护效果不佳的问题，另外，为了监测良率，会设计裂纹检测电路部分，不利于窄边框显示面板的设计。
因此，现有技术存在缺陷，急需改进。
 技术问题
本申请提供一种显示面板，能够解决显示面板在切割时所产生的裂纹对面内造成损伤以及无法及时监测裂纹情况的问题。
 技术解决方案
为解决上述问题，本申请提供的技术方案如下：
本申请提供一种显示面板，包括显示区以及围绕所述显示区设置的裂纹防护区，在所述裂纹防护区的外围设置有切割道；
所述显示面板还包括监测电路，所述监测电路用于监测针对所述切割道进行切割时所述切割道所产生的裂纹的情况；
其中，所述裂纹防护区内设置有环绕所述显示区并电连接所述监测电路的金属信号线，所述金属信号线在所述显示面板上的正投影的形状为曲线状，所述金属信号线包括第一金属层以及通过过孔与所述第一金属层电连接的第二金属层，所述第一金属层和/或所述第二金属层用于阻挡所述显示面板切割时产生的裂纹向所述显示区延伸。
在本申请的显示面板中，所述第一金属层包括间隔分布的第一金属图块，所述第二金属层包括间隔分布的第二金属图块，所述第一金属图块与所述第二金属图块均沿所述裂纹防护区围绕所述显示区设置。
在本申请的显示面板中，相邻两行/列的所述第一金属图块呈交错排列，且相邻两所述第一金属图块之间的距离小于所述第一金属图块的长度，所述第二金属图块呈阵列分布。
在本申请的显示面板中，一所述第二金属图块连接相邻且交错的两所述第一金属图块，同一行/列所述第二金属图块通过所述过孔将相邻两行/列的所述第一金属图块电性连接形成一条所述金属信号线。
在本申请的显示面板中，所述第一金属图块与所述第二金属图块的形状均为矩形，且所述第一金属图块与所述第二金属图块呈条状或者块状分布。
在本申请的显示面板中，相邻两行/列的所述第一金属图块呈交错排列，且相邻两所述第一金属图块之间的距离小于所述第一金属图块的长度；相邻两行/列的所述第二金属图块呈交错排列，且相邻两所述第二金属图块之间的距离小于所述第二金属图块的长度。
在本申请的显示面板中，一所述第二金属图块对应设置于相邻两所述第一金属图块之间的间隙位置，使得一行/列的所述第二金属图块通过所述过孔对应连接一行/列的所述第一金属图块，以形成所述金属信号线。
在本申请的显示面板中，所述第一金属图块与所述第二金属图块的形状均为U形，且所述第一金属图块与所述第二金属图块的U形开口呈反向设置，使得所述金属信号线在所述显示面板上的正投影的形状为曲线状。
在本申请的显示面板中，所述金属信号线经由金属走线与所述监测电路电连接，所述金属信号线用于接入恒压高电平信号/恒压低电平信号，所述监测电路还用于通过所述金属信号线监测所述恒压高电平信号/所述恒压低电平信号，其中，所述监测电路针对所述恒压高电平信号/所述恒压低电平信号的监测结果与所述切割道是否出现裂纹异常对应。
在本申请的显示面板中，在所述显示面板的切割制程中，当所述监测电路持续的监测到所述恒压高电平信号/所述恒压低电平信号时，则所述切割道无裂纹异常；否则所述切割道出现裂纹异常。
为解决上述问题，本申请还提供一种显示面板，包括显示区以及围绕所述显示区设置的裂纹防护区，在所述裂纹防护区的外围设置有切割道；
所述显示面板还包括监测电路，所述监测电路用于监测针对所述切割道进行切割时所述切割道所产生的裂纹的情况；
其中，所述裂纹防护区内设置有环绕所述显示区并电连接所述监测电路的金属信号线，所述金属信号线包括第一金属层以及通过过孔与所述第一金属层电连接的第二金属层，所述第一金属层和/或所述第二金属层用于阻挡所述显示面板切割时产生的裂纹向所述显示区延伸。
在本申请的显示面板中，所述第一金属层包括间隔分布的第一金属图块，所述第二金属层包括间隔分布的第二金属图块，所述第一金属图块与所述第二金属图块均沿所述裂纹防护区围绕所述显示区设置。
在本申请的显示面板中，相邻两行/列的所述第一金属图块呈交错排列，且相邻两所述第一金属图块之间的距离小于所述第一金属图块的长度，所述第二金属图块呈阵列分布。
在本申请的显示面板中，一所述第二金属图块连接相邻且交错的两所述第一金属图块，同一行/列所述第二金属图块通过所述过孔将相邻两行/列的所述第一金属图块电性连接形成一条所述金属信号线。
在本申请的显示面板中，所述第一金属图块与所述第二金属图块的形状均为矩形，且所述第一金属图块与所述第二金属图块呈条状或者块状分布。
在本申请的显示面板中，相邻两行/列的所述第一金属图块呈交错排列，且相邻两所述第一金属图块之间的距离小于所述第一金属图块的长度；相邻两行/列的所述第二金属图块呈交错排列，且相邻两所述第二金属图块之间的距离小于所述第二金属图块的长度。
在本申请的显示面板中，一所述第二金属图块对应设置于相邻两所述第一金属图块之间的间隙位置，使得一行/列的所述第二金属图块通过所述过孔对应连接一行/列的所述第一金属图块，以形成所述金属信号线。
在本申请的显示面板中，所述第一金属图块与所述第二金属图块的形状均为U形，且所述第一金属图块与所述第二金属图块的U形开口呈反向设置。
在本申请的显示面板中，所述金属信号线经由金属走线与所述监测电路电连接，所述金属信号线用于接入恒压高电平信号/恒压低电平信号，所述监测电路还用于通过所述金属信号线监测所述恒压高电平信号/所述恒压低电平信号，其中，所述监测电路针对所述恒压高电平信号/所述恒压低电平信号的监测结果与所述切割道是否出现裂纹异常对应。
在本申请的显示面板中，在所述显示面板的切割制程中，当所述监测电路持续的监测到所述恒压高电平信号/所述恒压低电平信号时，则所述切割道无裂纹异常；否则所述切割道出现裂纹异常。
 有益效果
本申请的有益效果为：相较于现有的显示面板，本申请提供的显示面板，通过在显示面板的切割道内侧设置环绕显示区的裂纹防护区，并在裂纹防护区内制备有双层金属搭配形成的金属信号线，通过对该双层金属的结构及排布方式进行设计，使得形成的金属信号线不仅能阻挡切割显示面板时所产生的裂纹向面内延伸，而且该金属信号线还通过与显示面板的监测电路连接形成对切割道裂纹异常的实时监控；另外，还有利于实现显示面板的窄边框化。
 附图说明
为了更清楚地说明实施例或现有技术中的技术方案，下面将对实施例或现有技术描述中所需要使用的附图作简单介绍，显而易见地，下面描述中的附图仅仅是申请的一些实施例，对于本领域普通技术人员来讲，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为本申请实施例提供的显示面板的俯视图；
图2为本申请实施例一提供的显示面板的裂纹防护区的第一金属层的局部示意图；
图3为本申请实施例一提供的显示面板的裂纹防护区的金属信号线的局部示意图；
图4为图3中所示的裂纹防护区在垂直于金属信号线方向上的膜层截面示意图；
图5为图3中所示的裂纹防护区在平行于金属信号线方向上的膜层截面示意图；
图6为本申请实施例一提供的显示面板的截面示意图；
图7为本申请实施例提供的显示面板裂纹监测的平面示意图；
图8为本申请实施例二提供的显示面板的裂纹防护区的第一金属层的局部示意图；
图9为本申请实施例二提供的显示面板的裂纹防护区的第二金属层的局部示意图；
图10为本申请实施例二提供的显示面板的裂纹防护区的金属信号线的局部示意图；
图11为图10中所示的裂纹防护区在平行于金属信号线方向上的膜层截面示意图；
图12为图10中所示的裂纹防护区在垂直于金属信号线方向上的膜层截面示意图；
图13为本申请实施例二提供的显示面板的截面示意图；
图14为本申请实施例三提供的显示面板的裂纹防护区在平行于金属信号线方向上的膜层截面示意图；
图15为本申请实施例三提供的显示面板的裂纹防护区在垂直于金属信号线方向上的膜层截面示意图；
图16为本申请实施例三提供的显示面板的截面示意图。
 本发明的实施方式
以下各实施例的说明是参考附加的图示，用以例示本申请可用以实施的特定实施例。本申请所提到的方向用语，例如[上]、[下]、[前]、[后]、[左]、[右]、[内]、[外]、[侧面]等，仅是参考附加图式的方向。因此，使用的方向用语是用以说明及理解本申请，而非用以限制本申请。在图中，结构相似的单元是用以相同标号表示。
本申请针对现有的显示面板，存在切割制程中所产生的裂纹对面内造成损伤以及无法及时监测裂纹情况的技术问题，本实施例能够解决该缺陷。
如图1所示，为本申请实施例提供的显示面板的俯视图。所述显示面板包括显示区010，以及围绕所述显示区010设置的切割道012，以及位于所述显示区010与所述切割道012之间的裂纹防护区011，所述裂纹防护区011围绕所述显示区010设置一圈。在所述显示面板的切割制程中，切割刀沿所述切割道012对所述显示面板进行切割，所述裂纹防护区011用于阻断在切割制程中所述显示面板边缘产生的裂纹向所述显示区010内延伸。
所述显示面板还包括监测电路（如图7中072所示），所述监测电路用于监测针对所述切割道012进行切割时所述切割道012所产生的裂纹的情况。所述裂纹防护区011内设置有围绕所述显示区010设置的金属信号线(如图3中101所示),所述金属信号线由第一金属层通过绝缘层上的过孔与第二金属层实现电连接形成的。其中，所述裂纹防护区011内的所述第一金属层和/或所述第二金属层用于阻挡所述显示面板切割时产生的裂纹向所述显示区010内延伸。
请参照图2和图3所示，所述第一金属层包括相互独立且相互交错的第一金属图块135和第一金属图块135’，一行/列所述第一金属图块135与一行/列所述第一金属图块135’相邻且交错设置，且相邻两所述第一金属图块135（135’）之间的距离小于所述第一金属图块135’（135）的长度。其中，所述第一金属图块135（135’）沿所述裂纹防护区011围绕所述显示区010设置。
所述第二金属层包括相互独立且阵列分布的第二金属图块136，所述第二金属图块136沿所述裂纹防护区011围绕所述显示区010设置。
其中，一所述第二金属图块136通过过孔连接相邻且交错的两所述第一金属图块，即一所述第二金属图块136的两端分别电连接一所述第一金属图块135和一所述第一金属图块135’。同一行/列所述第二金属图块136通过所述过孔连接在位置关系上相邻的一行/列所述第一金属图块135和一行/列所述第一金属图块135’，从而形成一条金属信号线101。所述裂纹防护区011内可设置一条或一条以上的所述金属信号线101。
在本实施例中，所述第一金属图块135（135’）与所述第二金属图块136的形状均为矩形，但并不以此为限。且所述第一金属图块135（135’）与所述第二金属图块136呈条状或者块状分布，并且使得所述金属信号线101在所述显示面板上的正投影的形状为曲线状。
所述显示面板若沿切割道112切割的过程中产生裂纹150，所述裂纹150会由所述切割道112向内侧延伸，部分所述裂纹150延伸至所述第一金属图块135处，遇到所述第一金属图块135则终止。部分所述裂纹150延伸至所述第一金属图块135’处，遇到所述第一金属图块135’则终止。由于所述第一金属图块135与所述第一金属图块135’交错排列，因此所述裂纹150延伸的路径均会被终止，有效的防止了所述裂纹150的延伸。此处需要注意的是，所述第一金属图块135和所述第一金属图块135’无本质区别，仅仅是交错排列。
请参照图4~图6所示，图4为图3中所示的裂纹防护区在垂直于金属信号线方向上的膜层截面示意图。所述显示面板包括衬底121，所述衬底121上包括柔性层、缓冲层等。所述衬底121上还制备有第一绝缘层122，所述第一绝缘层122可以为第一栅绝缘层。所述第一绝缘层122上制备有第一金属层，所述第一金属层图案化后形成间隔分布的所述第一金属图块135（135’），所述第一金属层可以为第一栅极金属层。第二绝缘层123制备于所述第一金属层上，所述第二绝缘层123可以为第二栅绝缘层（若所述第二金属层为第二栅极金属层），或者，所述第二绝缘层123可以为层间绝缘层（若所述第二金属层为源漏金属层），此处以所述第二金属层为源漏金属层进行说明，其中，所述第二绝缘层123上制备有露出部分所述第一金属层的过孔。所述第二金属层制备于所述第二绝缘层123上，图案化后形成第二金属图块136，所述第二金属图块136上制备有平坦化层124。
其中，所述第一金属图块135和所述第一金属图块135’在位置关系上相邻且交错的排列，所述第二金属图块136在垂直于所述金属信号线101的方向通过所述第二绝缘层123上的所述过孔分别与所述第一金属图块135和所述第一金属图块135’搭接，将所述第一金属图块135和所述第一金属图块135’交替的连接成所述金属信号线101。
图5为图3中所示的裂纹防护区在平行于金属信号线方向上的膜层截面示意图。图中为同一行/列所述第一金属图块135的截面示意图，所述第一金属图块135’的截面图与之相似，只是在位置关系上交错。
图6为本申请实施例一提供的显示面板的截面示意图。在界线191左侧为所述裂纹防护区域011，所述界线191右侧为所述显示面板的功能区（包括GOA区和所述显示区010）。在所述显示区内，所述衬底121上还制备有半导体有源层134，所述第一金属层图案化后还同时形成栅极，所述第二金属层图案化后还同时形成源漏极。当所述显示面板沿所述切割道112切割的过程中产生裂纹150时，所述第一金属图块135和所述第一金属图块135’会阻挡所述裂纹150向所述显示区延伸。由于所述第一金属图块135与所述第一金属图块135’交错排列，使得所述裂纹150的延伸路径将大大增加，此设计可以大大减小所述裂纹150向所述显示区延伸几率。
如图7所示，为本申请实施例提供的显示面板裂纹监测的平面示意图，不同的所述金属信号线在所述裂纹防护区011内沿所述显示区010绕线一周，且连接成一根信号线，成为裂纹的监测线路。所述显示区010的一侧设置有监测电路072，所述监测电路072位于所述显示区010与所述裂纹防护区011之间。所述裂纹防护区011内的所述金属信号线经由金属走线071与所述监测电路072电连接，所述金属信号线通过所述金属走线071接入恒压高电平信号/恒压低电平信号073，所述监测电路072还用于通过所述金属信号线监测所述恒压高电平信号/恒压低电平信号073，其中，所述监测电路072针对所述恒压高电平信号/恒压低电平信号073的监测结果与所述切割道012是否出现裂纹异常对应。
在所述显示面板的切割制程中，当所述监测电路072持续的监测到所述恒压高电平信号/恒压低电平信号073时，则所述切割道012无裂纹异常；否则所述切割道012出现裂纹异常。
具体地，在正常情况下，或是裂纹不严重的情况下，绕所述显示区010一周的所述金属信号线未发生断裂，能够传输所述恒压高电平信号/恒压低电平信号073，所述监测电路072能够监测到所述恒压高电平信号/恒压低电平信号073，在所述显示面板发光测试时不会有异常。当裂纹严重使所述金属信号线发生断裂时，则所述金属信号线上无法正常传输所述恒压高电平信号/恒压低电平信号073，所述监测电路072无法监测到所述恒压高电平信号/恒压低电平信号073，在特定的发光测试模式下（如测试红画面），在所述监测电路072连接所述金属走线071的位置，画面会显示异常，所述显示区010出现如图中所示的亮线/暗线074，则可判定发生了严重的裂纹，达到裂纹监测目的。
通过上述设计，使得本申请的所述显示面板不仅能阻挡切割时所产生的裂纹向面内延伸，而且还可以对切割道裂纹异常进行实时监控；另外，由于本申请的监测线路简单，还有利于实现显示面板的窄边框化。
请参照图8~图10所示，图8为本申请实施例二提供的显示面板的裂纹防护区的第一金属层的局部示意图。在本实施例中，所述第一金属层包括相互独立且相互交错的第一金属图块235和第一金属图块235’，一行/列所述第一金属图块235与一行/列所述第一金属图块235’相邻且交错设置，且相邻两所述第一金属图块235（235’）之间的距离小于所述第一金属图块235’（235）的长度。
如图9所示，所述第二金属层包括相互独立且相互交错的第二金属图块236和第二金属图块236’，一行/列所述第二金属图块236与一行/列所述第二金属图块236’在位置关系上相邻且交错设置，且相邻两所述第二金属图块236（236’）之间的距离小于所述第二金属图块236’（236）的长度。
结合图1所示，其中，所述第一金属图块235（235’）以及所述第二金属图块236（236’）均沿所述裂纹防护区011围绕所述显示区010设置。
如图10所示，一所述第二金属图块236（236’）对应设置于相邻两所述第一金属图块235（235’）之间的间隙位置，使得一行/列的所述第二金属图块236（236’）通过所述过孔对应连接一行/列的所述第一金属图块235（235’），以形成所述金属信号线201。
其中，所述第一金属图块235（235’）与所述第二金属图块236（236’）的形状均为U形，但并不以此为限。且所述第一金属图块235（235’）与所述第二金属图块236（236’）的U形开口呈反向设置，使得所述金属信号线201在所述显示面板上的正投影的形状为曲线状。
当切割道212附近产生裂纹250时，所述裂纹250会向面板内侧延伸。当所述裂纹250遇到所述第一金属图块235（235’）时会终止延伸，由于所述第一金属图块235与所述第一金属图块235’交错排列，使得所述裂纹250的延伸路径大大增加，从而减少了面板内部产生裂纹的几率。同理当所述裂纹250遇到所述第二金属图块236（236’）时会终止延伸，由于所述第二金属图块236与所述第二金属图块236’交错排列，使得所述裂纹250的延伸路径也会大大增加。通过层间绝缘层的开孔，所述第二金属图块236将相邻两所述第一金属图块235搭接，所述第二金属图块236’将相邻两所述第一金属图块235’搭接，形成至少两条所述金属信号线201。此处需要注意的是，所述第一金属图块235和所述第一金属图块235’，以及所述第二金属图块236和所述第二金属图块236’无本质区别，仅仅是交错排列。
采用此设计，使得相邻的所述第一金属图块235与所述第一金属图块235’、以及相邻的所述第二金属图块236与所述第二金属图块236’之间的间隙变小，从而使得所述裂纹250被终止延伸的几率进一步增大；另外，又由于采用U形结构设计，使得所述裂纹250在这种复杂的形貌下很难向其他方向延伸，又进一步增大了所述裂纹250被终止延伸的几率。
请参照图11~图13，如图11所示，所述显示面板包括衬底221，所述衬底221上包括柔性层、缓冲层等。所述衬底221上还依次制备有第一绝缘层222、第一金属层（235、235’）、第二绝缘层223、第二金属层（236、236’）、平坦化层224等。
其中，所述第一金属图块235和所述第一金属图块235’在位置关系上相邻且交错的排列，所述第二金属图块236和所述第二金属图块236’在位置关系上相邻且交错的排列。通过所述第二绝缘层223上的过孔，所述第二金属图块236在平行于所述金属信号线201的方向将相邻两所述第一金属图块235搭接，形成所述金属信号线201；所述第二金属图块236’在平行于所述金属信号线201的方向将相邻两所述第二金属图块235’搭接，形成所述金属信号线201。
如图12所示，在垂直于所述金属信号线201的方向上，所述第一金属图块235（235’）与所述第二金属图块236（236’）交错设置，所述第一金属图块235与所述第一金属图块235’相邻并交错设置，所述第二金属图块236与所述第二金属图块236’相邻并交错设置。
如图13所示，为本申请实施例二提供的显示面板的截面示意图。在界线291左侧为所述裂纹防护区域011，所述界线291右侧为所述显示面板的功能区（包括GOA区和所述显示区010）。在所述显示区内，所述衬底221上还制备有半导体有源层234，所述第一金属层图案化后还同时形成栅极，所述第二金属层图案化后还同时形成源漏极。当所述显示面板沿所述切割道212切割的过程中产生裂纹250时，所述第一金属图块235和所述第一金属图块235’会阻挡所述裂纹250向所述显示区延伸。同时，所述第二金属图块236和所述第二金属图块236’也会阻挡所述裂纹250向所述显示区延伸。由于所述第一金属图块235与所述第一金属图块235’、以及所述第二金属图块236和所述第二金属图块236’均采用交错排列，使得所述裂纹250的延伸路径将大大增加，从而可以大大减小所述裂纹250向所述显示区延伸几率。
本申请实施例二提供的显示面板的裂纹监测方式与上述实施例一中的裂纹监测方式一样，具体请参照上述实施例一中的描述，此处不再赘述。
请参照图14~图16所示，为本申请实施例三提供的显示面板的截面示意图。实施例三是在上述实施例二的基础上进一步改进，实施例三提供的显示面板的平面示意图可参考图8~图10，同样将所述第一金属层（335、335’）和第二金属层（336、336’）分别交错图案化排列，此处不再赘述。
如图14所示，所述显示面板包括衬底321，以及依次层叠制备于所述衬底321上的第一绝缘层322、第一金属层（335、335’）、第二绝缘层323、第二金属层（336、336’）、平坦化层324等。所述第一金属层形成交错排列的第一金属图块335和第一金属图块335’，所述第二金属层形成交错排列的第二金属图块336和第二金属图块336’。通过所述第二绝缘层323上的过孔，所述第二金属图块336在平行于金属信号线（如图10中的201）方向将相邻两所述第一金属图块335搭接，形成所述金属信号线；所述第二金属图块336’在平行于所述金属信号线的方向别将相邻两所述第一金属图块335’搭接，形成所述金属信号线。
如图15所示，在垂直于所述金属信号线（如图10中的201）的方向上，所述第一金属图块335（335’）与所述第二金属图块336（336’）交错设置，所述第一金属图块335与所述第一金属图块335’相邻并交错设置，所述第二金属图块336与所述第二金属图块336’相邻并交错设置。
本实施例与上述实施例二的区别在于：所述第一金属层（335、335’）通过所述第一绝缘层322上的挖孔，直接制备在了所述衬底321上，与切割道312附近的膜层情况一致，若所述显示面板切割时导致所述第一绝缘层322产生裂纹350，所述第一金属层（335、335’）同样能够阻止所述裂纹350的延伸，使得所述显示面板的裂纹防护效果更好。
如图16所示，为本申请实施例三提供的显示面板的截面示意图。并结合图1，在界线391左侧为所述裂纹防护区域011，所述界线391右侧为所述显示面板的功能区（包括GOA区和所述显示区010）。在所述显示区内，所述衬底321上还制备有半导体有源层334，所述第一金属层图案化后还同时形成栅极，所述第二金属层图案化后还同时形成源漏极。当所述显示面板沿所述切割道312切割的过程中产生裂纹350时，所述第一金属图块335和所述第一金属图块335’会阻挡所述裂纹350向所述显示区延伸。同时，所述第二金属图块336和所述第二金属图块336’也会阻挡所述裂纹350向所述显示区延伸。采用此种交错排列的方式，使得所述裂纹350的延伸路径将大大增加，从而可以大大减小所述裂纹350向所述显示区延伸几率。
本申请实施例三提供的显示面板的裂纹监测方式与上述实施例一中的裂纹监测方式一样，具体请参照上述实施例一中的描述，此处不再赘述。
综上所述，本申请提供的显示面板，通过在显示面板的切割道内侧设置环绕显示区的裂纹防护区，并在裂纹防护区内制备有双层金属搭配形成的金属信号线，通过对该双层金属的结构及排布方式进行设计，使得形成的金属信号线不仅能阻挡切割显示面板时所产生的裂纹向面内延伸，而且该金属信号线还通过与显示面板的监测电路连接形成对切割道裂纹异常的实时监控；另外，还有利于实现显示面板的窄边框化。
综上所述，虽然本申请已以优选实施例揭露如上，但上述优选实施例并非用以限制本申请，本领域的普通技术人员，在不脱离本申请的精神和范围内，均可作各种更动与润饰，因此本申请的保护范围以权利要求界定的范围为准。

Claims (20)

  1. 一种显示面板，其包括显示区以及围绕所述显示区设置的裂纹防护区，在所述裂纹防护区的外围设置有切割道；
    所述显示面板还包括监测电路，所述监测电路用于监测针对所述切割道进行切割时所述切割道所产生的裂纹的情况；
    其中，所述裂纹防护区内设置有环绕所述显示区并电连接所述监测电路的金属信号线，所述金属信号线在所述显示面板上的正投影的形状为曲线状，所述金属信号线包括第一金属层以及通过过孔与所述第一金属层电连接的第二金属层，所述第一金属层和/或所述第二金属层用于阻挡所述显示面板切割时产生的裂纹向所述显示区延伸。
  2. 根据权利要求1所述的显示面板，其中，所述第一金属层包括间隔分布的第一金属图块，所述第二金属层包括间隔分布的第二金属图块，所述第一金属图块与所述第二金属图块均沿所述裂纹防护区围绕所述显示区设置。
  3. 根据权利要求2所述的显示面板，其中，相邻两行/列的所述第一金属图块呈交错排列，且相邻两所述第一金属图块之间的距离小于所述第一金属图块的长度，所述第二金属图块呈阵列分布。
  4. 根据权利要求3所述的显示面板，其中，一所述第二金属图块连接相邻且交错的两所述第一金属图块，同一行/列所述第二金属图块通过所述过孔将相邻两行/列的所述第一金属图块电性连接形成一条所述金属信号线。
  5. 根据权利要求3所述的显示面板，其中，所述第一金属图块与所述第二金属图块的形状均为矩形，且所述第一金属图块与所述第二金属图块呈条状或者块状分布。
  6. 根据权利要求2所述的显示面板，其中，相邻两行/列的所述第一金属图块呈交错排列，且相邻两所述第一金属图块之间的距离小于所述第一金属图块的长度；相邻两行/列的所述第二金属图块呈交错排列，且相邻两所述第二金属图块之间的距离小于所述第二金属图块的长度。
  7. 根据权利要6所述的显示面板，其中，一所述第二金属图块对应设置于相邻两所述第一金属图块之间的间隙位置，使得一行/列的所述第二金属图块通过所述过孔对应连接一行/列的所述第一金属图块，以形成所述金属信号线。
  8. 根据权利要求6所述的显示面板，其中，所述第一金属图块与所述第二金属图块的形状均为U形，且所述第一金属图块与所述第二金属图块的U形开口呈反向设置，使得所述金属信号线在所述显示面板上的正投影的形状为曲线状。
  9. 根据权利要求1所述的显示面板，其中，所述金属信号线经由金属走线与所述监测电路电连接，所述金属信号线用于接入恒压高电平信号/恒压低电平信号，所述监测电路还用于通过所述金属信号线监测所述恒压高电平信号/所述恒压低电平信号，其中，所述监测电路针对所述恒压高电平信号/所述恒压低电平信号的监测结果与所述切割道是否出现裂纹异常对应。
  10. 根据权利要求9所述的显示面板，其中，在所述显示面板的切割制程中，当所述监测电路持续的监测到所述恒压高电平信号/所述恒压低电平信号时，则所述切割道无裂纹异常；否则所述切割道出现裂纹异常。
  11. 一种显示面板，其包括显示区以及围绕所述显示区设置的裂纹防护区，在所述裂纹防护区的外围设置有切割道；
    所述显示面板还包括监测电路，所述监测电路用于监测针对所述切割道进行切割时所述切割道所产生的裂纹的情况；
    其中，所述裂纹防护区内设置有环绕所述显示区并电连接所述监测电路的金属信号线，所述金属信号线包括第一金属层以及通过过孔与所述第一金属层电连接的第二金属层，所述第一金属层和/或所述第二金属层用于阻挡所述显示面板切割时产生的裂纹向所述显示区延伸。
  12. 根据权利要求11所述的显示面板，其中，所述第一金属层包括间隔分布的第一金属图块，所述第二金属层包括间隔分布的第二金属图块，所述第一金属图块与所述第二金属图块均沿所述裂纹防护区围绕所述显示区设置。
  13. 根据权利要求12所述的显示面板，其中，相邻两行/列的所述第一金属图块呈交错排列，且相邻两所述第一金属图块之间的距离小于所述第一金属图块的长度，所述第二金属图块呈阵列分布。
  14. 根据权利要求13所述的显示面板，其中，一所述第二金属图块连接相邻且交错的两所述第一金属图块，同一行/列所述第二金属图块通过所述过孔将相邻两行/列的所述第一金属图块电性连接形成一条所述金属信号线。
  15. 根据权利要求13所述的显示面板，其中，所述第一金属图块与所述第二金属图块的形状均为矩形，且所述第一金属图块与所述第二金属图块呈条状或者块状分布。
  16. 根据权利要求12所述的显示面板，其中，相邻两行/列的所述第一金属图块呈交错排列，且相邻两所述第一金属图块之间的距离小于所述第一金属图块的长度；相邻两行/列的所述第二金属图块呈交错排列，且相邻两所述第二金属图块之间的距离小于所述第二金属图块的长度。
  17. 根据权利要16所述的显示面板，其中，一所述第二金属图块对应设置于相邻两所述第一金属图块之间的间隙位置，使得一行/列的所述第二金属图块通过所述过孔对应连接一行/列的所述第一金属图块，以形成所述金属信号线。
  18. 根据权利要求16所述的显示面板，其中，所述第一金属图块与所述第二金属图块的形状均为U形，且所述第一金属图块与所述第二金属图块的U形开口呈反向设置。
  19. 根据权利要求11所述的显示面板，其中，所述金属信号线经由金属走线与所述监测电路电连接，所述金属信号线用于接入恒压高电平信号/恒压低电平信号，所述监测电路还用于通过所述金属信号线监测所述恒压高电平信号/所述恒压低电平信号，其中，所述监测电路针对所述恒压高电平信号/所述恒压低电平信号的监测结果与所述切割道是否出现裂纹异常对应。
  20. 根据权利要求19所述的显示面板，其中，在所述显示面板的切割制程中，当所述监测电路持续的监测到所述恒压高电平信号/所述恒压低电平信号时，则所述切割道无裂纹异常；否则所述切割道出现裂纹异常。
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