CN111736398B

CN111736398B - Display panel and display device

Info

Publication number: CN111736398B
Application number: CN202010540997.5A
Authority: CN
Inventors: 赵剑; 陈华
Original assignee: Shanghai Tianma Microelectronics Co Ltd
Current assignee: Shanghai Tianma Microelectronics Co Ltd
Priority date: 2017-02-28
Filing date: 2017-02-28
Publication date: 2023-05-05
Anticipated expiration: 2037-02-28
Also published as: CN111736395A; CN106773424A; CN111736395B; CN106773424B; CN111736398A

Abstract

The invention discloses a display panel and a display device, wherein the display panel comprises a substrate, a first electrode layer, a first insulating layer, a second electrode layer, a second insulating layer and a third electrode layer which are sequentially arranged on the substrate, and further comprises a first gate line, a second gate line, a line changing connecting block, a public electrode line and a first low-potential liner; the first electrode layer comprises a first gate line, the second electrode layer comprises a second gate line, the third electrode layer comprises a line changing connecting block, a first low-potential liner and a common electrode line, and the line changing connecting block is respectively and electrically connected with the first gate line and the second gate line through a via hole; at least part of the first low-potential liner is positioned between the line changing connecting block and the common electrode line, and the potential of the first low-potential liner is lower than the potential of the common electrode line and lower than the lowest potential of the line changing connecting block. The invention can protect the line changing connecting block area in the display panel from being corroded.

Description

Display panel and display device

Technical Field

The present invention relates to the technical field of display, and more particularly, to a display panel and a display device.

Background

The display panel is an important component of the display device and serves to provide a picture display for the display device, and generally, the display panel includes a display area and a frame area. In the display device, a screen is generated and displayed in a display area, and a peripheral circuit is provided in a frame area, which is not an effective screen display area. As the requirements of people on the display performance and the aesthetic degree of the display device are increasing, the narrow-frame display device becomes a direction pursued by more people.

In order to realize a narrow frame of a display device, a double-layer wiring design of a frame area is adopted at present, and the width of the frame area is reduced through double-layer wiring. The display panel of the display device in the prior art is provided with a common electrode line and a line changing connection block at the gate driving side. When the display panel works normally, the gate line is in a low potential state for most of the time, and is negative potential relative to the line changing connecting block and the public electrode line, so that an electrochemical corrosion positive electrode and an electrochemical corrosion negative electrode are formed, water, vapor or liquid crystal in the display device can be used as electrolyte, and after the line changing connecting block is used as the electrochemical corrosion negative electrode and is corroded and consumed, the gate line layer is corroded, and then the gate line layer is broken.

The existing data show: the corrosion disconnection on the gate driving side generally occurs for 500 to 600 hours, and there is no problem with respect to a general display device. However, in the case of a vehicle-mounted display device, the high-temperature and high-humidity test time is generally 500 to 1000 hours, and thus the problem of disconnection due to corrosion of the gate driving side is extremely likely to occur.

The method can also be adopted, and a channel mask is added, so that the grid lines are directly conducted through the channels, and the mode of bridging through a line changing connecting block is not adopted. So that all traces are under the passivation layer and no corrosion occurs. However, this approach not only increases the cost of the mask, but also affects the yield of the display device by one more process.

Therefore, it is a need in the art to provide a simple, convenient, and effective gate drive side corrosion protection scheme to extend the service life of a display panel in a display device.

Disclosure of Invention

In view of the above, the present invention provides a display panel and a display device including the same, which solves the technical problems of electrochemical corrosion on the gate driving side of the display panel of the display device and shortening the service life of the display panel of the display device in the prior art.

In order to solve the technical problems, the present invention provides a display panel, which comprises a substrate, and a first electrode layer, a first insulating layer, a second electrode layer, a second insulating layer, and a third electrode layer which are sequentially positioned on the substrate, wherein the display panel further comprises a first gate line, a second gate line, a line changing connection block, a common electrode line, and a first low-potential pad;

the first electrode layer comprises the first gate line, the second electrode layer comprises the second gate line, the third electrode layer comprises the line changing connecting block, the first low-potential liner and the common electrode line, and the line changing connecting block is respectively and electrically connected with the first gate line and the second gate line through a via hole;

at least part of the first low-potential liner is positioned between the line changing connecting block and the common electrode line, and the potential of the first low-potential liner is lower than that of the common electrode line and lower than the lowest potential of the line changing connecting block.

The invention also provides a display device which comprises the display panel.

Compared with the prior art, the display panel and the display device have the following beneficial effects:

(1) According to the display panel and the display device, the low-potential liner with lower potential is added beside the line changing connecting block in the display panel, and the cathode subjected to electrochemical corrosion in the display panel is changed from the gate line changing connecting block area to the low-potential liner with lower voltage, so that the low-potential liner area with lower voltage is corroded, the gate line changing connecting block area is protected from being corroded, and the service life of the display panel is prolonged.

(2) According to the display panel and the display device, the low-potential liner with lower potential is added beside the line-changing connecting block in the display panel, the cathode which is subjected to electrochemical corrosion is converted into the low-potential liner from the line-changing connecting block area, the double-layer wiring design of the frame area is not required to be changed, and the narrow frame requirement of the display panel can be met while the line-changing connecting block area is protected from corrosion.

(3) According to the display panel and the display device, the low-potential liner with lower potential is added beside the line-changing connecting block in the display panel, the cathode subjected to electrochemical corrosion is converted into the low-potential liner from the line-changing connecting block area, a mask process is not required to be added, the whole structure of the display panel is not required to be changed, and on the other hand, the low-potential liner is added beside the line-changing connecting block in the display panel, so that the anti-corrosion effect of the grid driving side can be simply, simply and effectively achieved.

(4) According to the display panel and the display device, the first low-potential gasket is added between the line changing connecting block and the common electrode line, the second low-potential gasket is added between the line changing connecting block and the peripheral circuit, and the cathode subjected to electrochemical corrosion is converted into the first low-potential gasket and the second low-potential gasket, so that the condition that the line changing connecting block in the display panel is corroded is further improved.

Of course, it is not necessary for any one product embodying the invention to achieve all of the technical effects described above at the same time.

Other features of the present invention and its advantages will become apparent from the following detailed description of exemplary embodiments of the invention, which proceeds with reference to the accompanying drawings.

Drawings

The accompanying drawings, which are incorporated in and constitute a part of this specification, illustrate embodiments of the invention and together with the description, serve to explain the principles of the invention.

FIG. 1 is a schematic diagram of a prior art display panel gate driving side;

FIG. 2 is a schematic diagram of a prior art line changing connection block of a display panel;

FIG. 3 is a schematic diagram of a display panel according to an embodiment of the invention;

FIG. 4 is a top view of the display panel of FIG. 3 according to an embodiment of the present invention;

FIG. 5 is a schematic diagram of another display panel according to an embodiment of the invention;

FIG. 6 is a top view of the display panel of FIG. 5 according to an embodiment of the present invention;

FIG. 7 is a schematic diagram of a display panel according to another embodiment of the present invention;

FIG. 8 is a schematic diagram illustrating an internal structure of the display panel of FIG. 7 according to an embodiment of the present invention;

FIG. 9 is a schematic diagram of a display panel according to another embodiment of the present invention;

FIG. 10 is a schematic view of the internal structure provided in FIG. 9 according to an embodiment of the present invention;

FIG. 11 is a schematic diagram illustrating a positional relationship between a first low-potential pad and a line changing connection block according to an embodiment of the present invention;

FIG. 12 is a schematic diagram showing a relationship between a first low-potential pad and a line changing connection block according to an embodiment of the present invention;

fig. 13 is a schematic diagram of a display device according to an embodiment of the invention.

Detailed Description

Various exemplary embodiments of the present invention will now be described in detail with reference to the accompanying drawings. It should be noted that: the relative arrangement of the components and steps, numerical expressions and numerical values set forth in these embodiments do not limit the scope of the present invention unless it is specifically stated otherwise.

The following description of at least one exemplary embodiment is merely exemplary in nature and is in no way intended to limit the invention, its application, or uses.

Techniques, methods, and apparatus known to one of ordinary skill in the relevant art may not be discussed in detail, but are intended to be part of the specification where appropriate.

In all examples shown and discussed herein, any specific values should be construed as merely illustrative, and not a limitation. Thus, other examples of exemplary embodiments may have different values.

It should be noted that: like reference numerals and letters denote like items in the following figures, and thus once an item is defined in one figure, no further discussion thereof is necessary in subsequent figures.

As shown in fig. 1, a schematic diagram of a structure of a gate driving side of a display panel in a prior art display device is provided, from a display area to a frame area, with edge non-display pixels (also called protection pixels) 101, a common electrode line 102, an electrostatic discharge device bar 103, an electrostatic discharge device 104, a line changing connection block 105, and a gate line area 106. The common electrode line 102 may be a continuous wire or may be discontinuous conductive blocks on the same line, and only one common electrode line 102 is shown in the figure. When the wire-changing connecting block works normally, after being corroded and consumed as a cathode of electrochemical corrosion, the grid wire layer is corroded, so that the grid wire layer is broken. The structure of the present line changing connection block is shown in FIG. 2, and the display panel comprises a substrate, a first electrode layer 141, a first insulating layer 142, a second electrode layer 143, and a second insulating layer 144 and a third electrode layer 145, the first electrode layer 141 includes a first gate line, the second electrode layer 143 includes a second gate line, the third electrode layer 145 includes a line changing connection block, the line changing connection block 105 included In the third electrode layer 145 is made of indium tin oxide (ITO for short), the chemical formula: in ₂ O ₃ SnO ₂ ) The wire-changing connection block is electrically connected to the first gate wire of the first electrode layer 141 and the second gate wire of the second electrode layer 143 through the via holes in the first insulating layer 142 and the second insulating layer 144, thereby realizing a wire-changing function of changing the gate wire from the first electrode layer 141 to the second electrode layer 143. The ITO at the wire-changing connecting block is easy to generate electrochemical corrosion in a high-temperature high-humidity experiment and is consumed, and then the ITO is corroded to the grid wire layer, so that the risk of wire breakage of the grid wire layer can be caused, and the service life of the display panel is finally shortened. Based on the above technical problems, the present application provides the following solutions.

Fig. 3 and fig. 4 show a schematic structural diagram of a display panel according to the present embodiment; fig. 4 is a top view of the display panel provided in fig. 3. The display panel includes: a display region 313 and a non-display region 314 surrounding the display region 313, wherein the non-display region 314 comprises a substrate 301, and a first electrode layer 302, a first insulating layer 303, a second electrode layer 304, a second insulating layer 305 and a third electrode layer 306 sequentially disposed on the substrate 301; the display panel further includes a first gate line 307, a second gate line 308, a line changing connection block 309, a common electrode line 310, and a first low potential pad 311.

In some alternative embodiments, the first insulating layer 303 and the second insulating layer 305 may be formed using CVD or PVD vapor deposited silicon oxide-silicon nitride or the like. The first electrode layer and the second electrode layer are internally provided with the gate lines, and the insulativity between the first electrode layer and the second electrode layer is ensured through the first insulating layer between the first electrode layer and the second electrode layer.

The first electrode layer 302 includes a first gate line 307, the second electrode layer 304 includes a second gate line 308, the third electrode layer 306 includes a line changing connection block 309, a first low potential pad 311 and a common electrode line 310, and the line changing connection block 309 is electrically connected to the first gate line 307 and the second gate line 308 through a via 312, respectively. The first grid line is changed into the second grid line of the second electrode layer through the through hole, so that the purpose of double-layer wiring is achieved, and meanwhile, the two layers are prevented from being mutually influenced by conduction. In some alternative embodiments, the first gate lines 307 and the second gate lines 308 are alternately arranged, and the first gate lines and the second gate lines are alternately arranged on two layers of the line replacement, so that the problem that the arrangement width of the gate lines is increased due to the disordered arrangement of the line replacement can be avoided, and the narrow frame requirement of the display panel is also facilitated to a certain extent. In other alternative embodiments, the second electrode layer 304 further includes a third gate line, where the second gate line and the third gate line respectively extend in a direction parallel to the common electrode line and are alternately arranged perpendicular to the common electrode line.

The line changing connection block 309 is made of conductive materials, and the line changing connection block 309 is used for changing the first gate line 307 from the first electrode layer 302 to the second gate line 308 of the second electrode layer 304, so that the design of double-layer wiring in the frame area of the display panel is realized, and compared with the arrangement of the gate lines in the same layer, the arrangement width of the gate lines in the frame area is greatly reduced, and the effect of narrowing the frame of the display panel can be achieved. Optionally, the wire-changing connection block may be a conductive connection block such as a conductive connection wire or connection block, and more preferably may be a metal connection block. In some alternative embodiments, the line changing connection block is made of indium tin oxide, and the line changing connection block in this embodiment functions to change the line of the first gate line from the first electrode layer to the second gate line of the second electrode layer, and the shape structure of the line changing connection block itself is not limited, so long as the line changing connection block structure capable of realizing the above functions is within the scope of this embodiment.

At least a part of the first low potential pad 311 is located between the line changing connection block 309 and the common electrode line 310, the potential of the first low potential pad 311 is lower than the potential of the common electrode line 310, and the potential of the first low potential pad 311 is also lower than the lowest potential of the line changing connection block 309.

In some alternative embodiments, the potential of the first low potential pad 311 is a constant potential, and the constant potential of the first low potential pad 311 is beneficial to ensure the stability of the potential in the display panel, however, the present embodiment does not limit whether the potential of the first low potential pad 311 is a constant potential, as long as the potential of the first low potential pad 311 can be made lower than the potential of the common electrode line 310, and the setting manner that the potential of the first low potential pad 311 is also lower than the lowest potential of the line changing connection block 309 is within the scope of the present embodiment.

In other alternative embodiments, the first low-potential pad 311 is a conductive block, and the conductive block is used as the first low-potential pad 311 to facilitate the placement of the first low-potential pad 311 between the line-changing connection block 309 and the common electrode line 310, because the lines and layers in the display panel are more, the first low-potential pad 311 with linearity can easily touch other structures in the display panel, thereby improving the complexity of the wiring design, and the placement position of the conductive block has stronger maneuverability, so that the complexity of the process is reduced. However, the present embodiment is not limited to the shape of the first low potential pad 311, as long as the potential of the first low potential pad 311 can be made lower than the potential of the common electrode line 310, and the arrangement manner in which the potential of the first low potential pad 311 is also lower than the lowest potential of the line change connection block 309 is within the scope of the present embodiment.

In other alternative embodiments, as shown in fig. 11, the positional relationship between the first low-potential pad 311 and the circumferential line connecting block 309 in this embodiment is shown. The pattern of the first low potential pad 311 is a closed pattern surrounding and insulated from the line changing connection block 309. In the display panel, the line changing connection block 309 is surrounded by other devices, the line changing connection block 309 is not protected from electrochemical corrosion in all directions, and the surrounding first low-potential liner 311 can protect the line changing connection block 309 from electrochemical corrosion in all directions, so that the line changing connection block 309 can be better protected. The shape of the first low potential pad 311 is not limited in this embodiment, and in other alternative embodiments, the first low potential pad 311 may be a conductive line parallel to the common electrode line 310, as shown in fig. 12.

In other alternative embodiments, the common electrode lines 310 may also be conductive blocks, where the conductive blocks are designed to facilitate the arrangement of the common electrode lines 310 in the display panel, and further facilitate reducing the complexity of traversing other structures by the common electrode lines 310 in the display panel.

And a first low-potential liner with lower potential is arranged between the line-changing connecting block and the public electrode line, and an electrochemical corrosion cathode in the display panel is converted into the first low-potential liner from the line-changing connecting block area, so that stronger corrosion occurs at the first low-potential liner, and the line-changing connecting block area is not corroded.

The display panel of this embodiment is particularly suitable for being used in vehicle-mounted flat panel display and other flat panel displays with high reliability requirements, under the specification of the vehicle-mounted display, the double-layer wiring and the line changing of the line changing connecting block can be adopted in the frame of the display panel of this embodiment, the line changing connecting block area is protected from corrosion by the low-potential liner (the first low-potential liner and the second low-potential liner), the condition that the line changing connecting block area is broken is avoided, the mask process is not required to be increased, and the narrow frame requirements of the vehicle-mounted flat panel display and other flat panel displays with high reliability requirements are ensured to a certain extent.

As shown in fig. 5 and fig. 6, fig. 5 is a schematic structural diagram of another display panel according to the present embodiment; FIG. 6 is a top view of the display panel provided in FIG. 5, the display panel including a display region 501 and a non-display region 514 surrounding the display region 501, the non-display region 514 including a first electrode layer 502, a first insulating layer 503, a second electrode layer 504, a second insulating layer 505 and a third electrode layer 506; the display panel further includes a first gate line 507, a second gate line 508, a line changing connection block 509, a common electrode line 510, a first low potential pad 511 and a second low potential pad 512.

The first electrode layer 502 includes a first gate line 507, the second electrode layer 504 includes a second gate line 508, the third electrode layer 506 includes a line changing connection block 509, a first low-potential pad 511 and a common electrode line 510, and the line changing connection block 509 is electrically connected to the first gate line 507 and the second gate line 508 through a via 513, respectively.

The line changing connecting block 509 is made of conductive materials, and the first gate line 507 is changed from the first electrode layer 502 to the second gate line 508 of the second electrode layer 504 through the line changing connecting block 509, so that the design of double-layer wiring in the frame area of the display panel is realized, and compared with the arrangement of the gate lines in the same layer, the arrangement width of the gate lines in the frame area is greatly reduced, and the effect of narrowing the frame of the display panel can be achieved. Alternatively, the wire-changing connection block may be a conductive connection block such as a conductive connection wire or a metal connection block.

The first low-potential pad 511 is located between the line-changing connection block 509 and the common electrode line 510, the potential of the first low-potential pad 511 is lower than the potential of the common electrode line 510, and the potential of the first low-potential pad 511 is also lower than the lowest potential of the line-changing connection block 509.

The third electrode layer 506 includes a wire-changing connection block 509, a second low-potential pad 512 and a common electrode wire 510, the potential of the second low-potential pad 512 is lower than that of the wire-changing connection block 509, and the wire-changing connection block 509 is located between the first low-potential pad 511 and the second low-potential pad 512.

In some alternative embodiments, the first low potential pad and the second low potential pad comprise at least one material of molybdenum, aluminum, a stack of molybdenum and aluminum, indium tin oxide.

The second low-potential gaskets are arranged beside the line-changing connecting block, the line-changing connecting block is positioned between the first low-potential gaskets and the second low-potential gaskets, the lower low-potential gaskets are arranged on two sides of the line-changing connecting block, and when electrochemical corrosion occurs, the first low-potential gaskets and the second low-potential gaskets on two sides of the line-changing connecting block can replace the line-changing connecting block to serve as cathodes of the electrochemical corrosion, so that the line-changing connecting block is protected from the electrochemical corrosion of the two side surfaces. In the present embodiment, the number and the positions of the low-potential pads around the line-changing connection block are not limited, and the arrangement of the low-potential pads having a potential lower than that of the line-changing connection block should be within the scope of the present embodiment.

In other alternative embodiments, the second low-potential pad 512 is a conductive block, and the conductive block is used as the second low-potential pad 512 to be conveniently placed, because the lines and layers in the display panel are more, the linear second low-potential pad 512 is easy to touch other structures in the display panel, so that the complexity of wiring design is improved, and the placement position of the conductive block is utilized to have stronger flexibility, so that the complexity of the process is reduced. However, the present embodiment is not limited to the shape of the second low potential pad 512, as long as the potential of the second low potential pad 512 can be made lower than the potential pad of the common electrode line 510, and the arrangement manner in which the potential of the second low potential pad 512 is also lower than the lowest potential of the line change connection block 509 is within the scope of the present embodiment. In other alternative embodiments, the second low-potential pad 512 may also be a conductive line parallel to the common electrode line 510.

Fig. 7 and 8 show a schematic structural diagram of a display area and a frame area in a display panel according to another embodiment; fig. 8 is a schematic diagram illustrating an internal structure of the display panel provided in fig. 7. The display panel comprises a substrate 701, a first electrode layer 702, a first insulating layer 703, a second electrode layer 704, a second insulating layer 705 and a third electrode layer 706 which are sequentially arranged on the substrate; and the display panel further includes a first gate line 707, a second gate line 708, a line changing connection block 709, a common electrode line 710, a first low potential pad 711, and a second low potential pad 712.

The first electrode layer 702 includes a first gate line 707, the second electrode layer 704 includes a second gate line 708, the third electrode layer 706 includes a wire-change connection block 709, and the wire-change connection block 709 is electrically connected to the first gate line 707 and the second gate line 708 through a via hole 713, respectively.

The line changing connection block 709 is made of conductive materials, and the line changing connection block 709 is used for changing the first gate line 707 from the first electrode layer 702 to the second gate line 708 of the second electrode layer 704, so that the design of double-layer wiring in the frame area of the display panel is realized, and compared with the arrangement of the gate lines in the same layer, the arrangement width of the gate lines in the frame area is greatly reduced, and the effect of narrowing the frame of the display panel can be achieved. Alternatively, the wire-changing connection block may be a conductive connection block such as a conductive connection wire or a metal connection block.

The first low-potential pad 711 is located between the line-changing connection block 709 and the common electrode line 710, and the third electrode layer 706 includes the line-changing connection block 709, the first low-potential pad 711 and the common electrode line 710, wherein the potential of the first low-potential pad 711 is lower than the potential of the common electrode line 710, and the potential of the first low-potential pad 711 is also lower than the lowest potential of the line-changing connection block 709.

The third electrode layer 706 further includes a second low-potential pad 712, the second low-potential pad 712 has a potential lower than that of the wire-changing connection block 709, and the wire-changing connection block 709 is located between the first low-potential pad 711 and the second low-potential pad 712.

The display panel comprises a display area 716 and a frame area 717 surrounding the display area 716, wherein the frame area 717 comprises a line changing connection block 709 and a second low-potential pad 712, the frame area 717 is further provided with a peripheral circuit 718, and the second low-potential pad 712 is located between the line changing connection block 709 and the peripheral circuit 718. In some alternative embodiments, the first electrode layer 702, the first insulating layer 703, the second electrode layer 704, the second insulating layer 705, the third electrode layer 706, the first gate line 707, the second gate line 708, the line changing connection block 709, the common electrode line 710, the first low potential pad 711, and the second low potential pad 712 are all located in the frame region 717.

In some alternative embodiments, the peripheral circuit 718 is an electrostatic discharge circuit or a shift register circuit. The circuit of the display panel can be protected from being damaged by electrostatic discharge through the electrostatic discharge circuit in the display panel; for the shift register circuit, it is usually fabricated directly on the substrate of the display panel through a semiconductor process, and a plurality of gate signals are sequentially output through a plurality of shift registers connected in series to drive the pixel array of the display panel. Therefore, the electrostatic discharge circuit, the shift register circuit or other peripheral circuits have a certain potential in the working process, and the line changing connection block has a lower potential in the working process, which causes electrochemical corrosion of the line changing connection block with the peripheral circuit with a higher potential under the condition that water, water vapor or liquid crystal is used as electrolyte in the display panel, and finally the line changing connection block area is corroded and consumed at one side close to the peripheral circuit. In the embodiment, the second low-potential pad is arranged between the line-changing connecting block and the peripheral circuit, and the electrochemical corrosion is performed by replacing the line-changing connecting block with the second low-potential pad with lower potential, so that one side, close to the peripheral circuit, of the line-changing connecting block can be conveniently and effectively protected from being consumed by the electrochemical corrosion.

As shown in fig. 9 and 10, fig. 9 is a schematic structural diagram of a display area and a frame area in a display panel according to another embodiment; fig. 10 is a schematic diagram of an internal structure of the display panel provided in fig. 9. The display panel includes a display area 1016 and a frame area 1017 surrounding the display area 1016, wherein the frame area 1017 includes: a substrate 1001, and a first electrode layer 1002, a first insulating layer 1003, a second electrode layer 1004, a second insulating layer 1005, and a third electrode layer 1006 which are sequentially provided over the substrate 1001; the display panel further includes a first gate line 1007, a second gate line 1008, a line changing connection block 1009, a common electrode line 1010, a first low potential pad 1011, a second low potential pad 1012, a flexible circuit board 1018, and an integrated circuit 1019.

The first electrode layer 1002 includes a first gate line 1007, the second electrode layer 1004 includes a second gate line 1008, the third electrode layer 1006 includes a line changing connection block 1009, a first low potential pad 1011, and a common electrode line 1010, and the line changing connection block 1009 is electrically connected to the first gate line 1007 and the second gate line 1008 through a via 1013, respectively.

The line changing connecting block 1009 is made of conductive materials, and the first grid line 1007 is changed from the first electrode layer 1002 to the second grid line 1008 of the second electrode layer 1004 through the line changing connecting block 1009, so that the design of double-layer wiring in the frame area of the display panel is realized, and compared with the design that the grid lines are all arranged on the same layer, the arrangement width of the grid lines in the frame area is greatly reduced, and the effect of narrowing the frame of the display panel can be achieved. Alternatively, the wire-changing connection block may be a conductive connection block such as a conductive connection wire or a metal connection block.

The first low potential pad 1011 is located between the wire-changing connection block 1009 and the common electrode wire 1010, the first low potential pad 1011 and the third electrode layer 1006 comprises the wire-changing connection block 1009, the first low potential pad 1011 and the common electrode wire 1010, the potential of the first low potential pad 1011 is lower than the potential of the common electrode wire 1010, and the potential of the first low potential pad 1011 is also lower than the lowest potential of the wire-changing connection block 1009.

The third electrode layer 1006 further includes a second low potential pad 1012, the second low potential pad 1012 has a potential lower than that of the wire-changing connection block 1009, and the wire-changing connection block 1009 is located between the first low potential pad 1011 and the second low potential pad 1012.

The first low potential pad 1011 and the second low potential pad 1012 are electrically connected to the flexible circuit board 1018 or the integrated circuit 1019. In this embodiment, the flexible circuit board or the integrated circuit in the display panel supplies power to the first low-potential pad and the second low-potential pad, so that the electric energy of the display panel is utilized to ensure the normal operation of the first low-potential pad and the second low-potential pad, the self structure of the display panel is not changed, the manufacturing process of rewiring is saved, and the yield of the display panel is improved.

In some alternative embodiments, the flexible circuit board 1018 and the integrated circuit 1019 may be located anywhere in a display area or a bezel area in the display panel, and the location of the flexible circuit board 1018 and the integrated circuit 1019 is not limited in this embodiment. In fig. 9, only the first low-potential pad is electrically connected to the flexible circuit board, and the second low-potential pad is electrically connected to the integrated circuit, and the form of the first low-potential pad and the second low-potential pad electrically connected to the flexible circuit board or the integrated circuit is not limited. It is also possible that the first low potential pad and the second low potential pad are both electrically connected to the flexible circuit board, or that the first low potential pad and the second low potential pad are both electrically connected to the integrated circuit, or that the first low potential pad is electrically connected to the integrated circuit and the second low potential pad is electrically connected to the flexible circuit board.

In some alternative embodiments, the display panel includes a low potential signal line 1020, one end of the low potential signal line 1020 is connected with the first low potential pad or the second low potential pad; while the other end of the low potential signal line 1020 is electrically connected to the flexible circuit board 1018 or the integrated circuit 1019.

In other alternative embodiments, the low potential signal line 1020 is co-layered with the first electrode layer or the second electrode layer; the low potential signal line 1020 is connected to the first low potential pad or the second low potential pad through a via hole. In this embodiment, the arrangement positions of the low-potential signal lines of the first low-potential pad and the second low-potential pad are not limited, and in fig. 10, only the low-potential signal line of the first low-potential pad and the second electrode layer are co-layered, and the low-potential signal line of the second low-potential pad and the first electrode layer are schematically illustrated, and in other alternative embodiments, the low-potential signal lines of the first low-potential pad and the second low-potential pad may be co-layered with the first electrode layer or the second electrode layer; the low potential signal line of the first low potential pad may be provided in the same layer as the first electrode layer, and the low potential signal line of the second low potential pad may be provided in the same layer as the second electrode layer.

The present embodiment further provides a display apparatus, as shown in fig. 9, where the display apparatus 900 includes the display panel described in the foregoing embodiment, and the display apparatus 900 may be a mobile phone, a tablet computer, a wearable display device, or the like, as shown in fig. 13. It can be understood that when the display panel is a liquid crystal display device, the display device 900 may further include a backlight source, a light guide plate, and a liquid crystal layer, an alignment film, a protective glass, and other well-known structures between the array substrate and the color film substrate, which are not described herein.

According to the embodiment, the display panel and the display device have the following beneficial effects:

A computer program product. Accordingly, the present invention may take the form of an entirely hardware embodiment, an entirely software embodiment or an embodiment combining software and hardware aspects.

While certain specific embodiments of the invention have been described in detail by way of example, it will be appreciated by those skilled in the art that the above examples are for illustration only and are not intended to limit the scope of the invention. It will be appreciated by those skilled in the art that modifications may be made to the above embodiments without departing from the scope and spirit of the invention. The scope of the invention is defined by the appended claims.

Claims

1. The display panel is characterized by comprising a display area, a frame area surrounding the display area, a substrate, a first electrode layer, a first insulating layer, a second electrode layer, a second insulating layer and a third electrode layer, wherein the first electrode layer, the first insulating layer, the second electrode layer, the second insulating layer and the third electrode layer are sequentially arranged on the substrate;

the display panel also comprises a first gate line, a second gate line, a line changing connecting block, a common electrode line and a first low-potential liner, wherein the first gate line, the second gate line, the line changing connecting block, the common electrode line and the first low-potential liner are arranged in the frame area, and the first low-potential liner is a wire parallel to the common electrode line;

the first electrode layer comprises the first gate line, the second electrode layer comprises the second gate line, the third electrode layer comprises the line changing connecting block, the first low-potential liner and the common electrode line, the line changing connecting block is respectively and electrically connected with the first gate line and the second gate line through a via hole, and the line changing connecting block is a metal connecting block or is composed of indium tin oxide;

at least part of the first low-potential liner is positioned between the line changing connecting block and the common electrode line, and the potential of the first low-potential liner is lower than the potential of the common electrode line and lower than the lowest potential of the line changing connecting block;

the low potential signal line is connected to the first low potential pad through a via hole, and the low potential signal line is in the same layer as the first gate line.

2. The display panel according to claim 1, wherein a potential of the first low potential spacer is a constant potential.

3. The display panel of claim 1, wherein the third electrode layer further comprises a second low potential pad having a potential lower than a potential of the line change connection block, and the line change connection block is located between the first low potential pad and the second low potential pad.

4. The display panel according to claim 3, wherein the second low-potential pad is located in the frame area, the frame area is further provided with a peripheral circuit, and the second low-potential pad is located between the line changing connection block and the peripheral circuit.

5. The display panel of claim 3, further comprising a flexible circuit board and an integrated circuit, wherein the first low-potential pad and the second low-potential pad are each electrically connected to the flexible circuit board or the integrated circuit.

6. The display panel according to claim 5, wherein one end of the low potential signal line is connected to the first low potential pad, and the other end of the low potential signal line is electrically connected to the flexible circuit board or the integrated circuit.

7. The display panel according to claim 6, wherein the low potential signal line is in the same layer as the first electrode layer; the low potential signal line is connected to the first low potential pad through a via hole.

8. The display panel of claim 3, wherein the first low potential pad and the second low potential pad comprise at least one material of molybdenum, aluminum, a molybdenum aluminum laminate, indium tin oxide.

9. The display panel of claim 1, wherein the first low-potential pad is a conductive bump.

10. A display device comprising a display panel according to any one of claims 1-9.