CN210294768U

CN210294768U - Display panel and display device

Info

Publication number: CN210294768U
Application number: CN201920872951.6U
Authority: CN
Inventors: 常红燕
Original assignee: Beihai HKC Optoelectronics Technology Co Ltd; Chuzhou HKC Optoelectronics Technology Co Ltd
Current assignee: Beihai HKC Optoelectronics Technology Co Ltd; Chuzhou HKC Optoelectronics Technology Co Ltd
Priority date: 2019-06-11
Filing date: 2019-06-11
Publication date: 2020-04-10
Anticipated expiration: 2029-06-11

Abstract

The application discloses a display panel and a display device. The display panel is divided into a display area and a non-display area and comprises a substrate, a public bus and a retaining wall, wherein an active switch for controlling the display of the display panel is formed on the substrate; the common bus is formed on the substrate and is positioned in the non-display area of the display panel; the retaining wall is located above the public bus, wherein the public bus comprises a hollow-out part and a connecting part surrounding the hollow-out part. The PI liquid flow control device is used for reducing diffusion of PI (polyimide) liquid out of a public bus, partial public bus is hollowed out to form a plurality of hollowed-out parts, partial PI liquid flows into the hollowed-out parts when the PI liquid flows through the public bus, the hollowed-out parts can store partial PI liquid, a buffering effect is achieved, the trend that the PI liquid continues to flow out of the public bus is reduced, a retaining wall is correspondingly arranged on the public bus, the difficulty of the PI liquid flowing out of the public bus is improved, diffusion and overflow of the PI liquid are effectively prevented, the PI liquid is prevented from flowing to a frame glue position, frame glue is polluted, and solidification of the frame glue is influenced.

Description

Display panel and display device

Technical Field

The application relates to the technical field of display, in particular to a display panel and a display device.

Background

In a process of manufacturing a TFT (Thin Film Transistor) display panel, an alignment layer is generally formed on a substrate (including an array substrate and a color filter substrate), and an alignment angle is formed on the alignment layer so that liquid crystal molecules are aligned in advance in the direction of the alignment angle. The orientation angle means an angle at which the liquid crystal molecules are tilted along the plane of the substrate. One way to form the orientation angle is to rub the orientation layer with lint in a certain direction so that microscopic grooves are formed on the surface of the orientation layer, and the long axes of the liquid crystal molecules are arranged along the grooves to achieve the pre-alignment effect.

However, when the alignment layer is formed by coating the alignment liquid, the alignment liquid often overflows to the sealant in the non-display region of the display panel, which affects the curing of the sealant.

SUMMERY OF THE UTILITY MODEL

The application aims to provide a display panel and a display device capable of reducing PI liquid overflow.

The application discloses a display panel, which is divided into a display area and a non-display area and comprises a substrate, a public bus and a retaining wall, wherein an active switch for controlling the display of the display panel is formed on the substrate; the public bus is formed on the substrate and is positioned in a non-display area of the display panel; and the retaining wall is positioned above the public bus; wherein the common bus comprises a hollowed-out portion and a connecting portion surrounding the hollowed-out portion; the retaining walls are correspondingly arranged on the public bus.

Optionally, the hollow portion comprises a plurality of hollow through grooves, and the hollow through grooves are evenly distributed.

Optionally, the hollowed-out through grooves are divided into a plurality of through groove groups, each through groove group is uniformly distributed in the long edge direction of the public bus in a plurality of the hollowed-out through grooves, each hollowed-out through groove is a rectangular hollowed-out through groove, and the long edge direction of each rectangular hollowed-out through groove is consistent with the long edge direction of the public bus.

Optionally, the connection portion includes a plurality of connection lines in a direction consistent with a long side direction of the common bus, and the connection lines are mutually communicated at two ends of the common bus; and the adjacent two connecting wires are hollowed, and the formed hollowed parts are strip-shaped hollowed through grooves.

Optionally, the retaining wall is arranged above the connecting line on one side, away from the display area, of each strip-shaped hollow through groove; the retaining wall is long-strip-shaped, and the length of the retaining wall is consistent with that of the public bus.

Optionally, the common bus includes a first common bus disposed on a first side of the display panel and a second common bus disposed on a second side of the display panel, the first common bus and the second common bus are communicated with each other, and a strip-shaped hollowed through groove corresponding to the first common bus and a strip-shaped hollowed through groove corresponding to the second common bus are communicated with each other.

Optionally, the hollow part includes a plurality of isosceles triangle hollow through grooves uniformly arranged along the long side direction of the public bus, and/or a plurality of diamond hollow through grooves uniformly arranged along the long side direction of the public bus; the hollow parts hollow out the common buses to form the connecting parts in a twill grid shape; the barricade is formed on the connecting portion, the shape of barricade is sawtooth shape.

Optionally, the retaining wall is formed above the connection portion and completely covers the connection portion.

The application also discloses a display panel, which is divided into a display area and a non-display area and comprises a substrate, a first metal layer, a first insulating layer, a second metal layer and a second insulating layer, wherein an active switch for controlling the display of the display panel is formed on the substrate; the first metal layer is formed on the substrate and is positioned in a non-display area of the display panel; the first insulating layer is positioned on the first metal layer; the second metal layer is positioned on the first insulating layer; the second insulating layer is positioned on the second metal layer; the common bus is formed on the first metal layer and comprises a hollow part and a connecting part surrounding the hollow part; the public bus is hollowed to form the hollowed part; the second metal layer forms a retaining wall positioned on the first insulating layer, and the retaining wall is correspondingly arranged on the public bus; the connecting part comprises a plurality of connecting wires consistent with the long side direction of the public bus, and the connecting wires are mutually communicated at two ends of the public bus; hollowing between two adjacent connecting lines to form a hollow part which is a strip-shaped hollow through groove; the retaining wall is arranged above the connecting line on one side, away from the display area, of each strip-shaped hollow through groove; the retaining wall is long-strip-shaped, and the length of the retaining wall is consistent with that of the public bus.

The application also discloses a display device, which comprises the driving circuit board and the display panel.

Compared with the scheme that the PI liquid is only blocked by the public bus, the scheme has the advantages that the diffusion of the PI liquid out of the public bus is reduced, part of the public bus is hollowed out to form a plurality of hollowed-out parts, the hollowed-out parts are equivalent to grooves, the upper surfaces of the hollowed-out parts are lower than the upper surface of the public bus, when the PI liquid flows through the public bus, part of the PI liquid flows into the hollowed-out parts, the hollowed-out parts can store part of the PI liquid, a buffering effect is achieved, the trend that the PI liquid continues to flow out of the public bus is reduced, the retaining wall is correspondingly arranged on the public bus, the difficulty of the PI liquid flowing out of the public bus is improved, the PI liquid is effectively blocked from diffusing and overflowing, the PI liquid is prevented from flowing to the frame glue to pollute the frame glue, and the solidification of.

Drawings

The accompanying drawings, which are included to provide a further understanding of the embodiments of the application, are incorporated in and constitute a part of this specification, illustrate embodiments of the application and together with the description serve to explain the principles of the application. It is obvious that the drawings in the following description are only some embodiments of the application, and that for a person skilled in the art, other drawings can be derived from them without inventive effort. In the drawings:

FIG. 1 is a schematic view of an exemplary substrate;

FIG. 2 is a schematic diagram of a display device according to an embodiment of the present application;

fig. 3 is a schematic structural view of a retaining wall and a hollow through groove according to an embodiment of the present application;

FIG. 4 is a schematic structural view of another retaining wall and hollowed through groove according to an embodiment of the present application;

FIG. 5 is a schematic structural view of another retaining wall and hollowed through groove according to an embodiment of the present application;

FIG. 6 is a schematic structural view of another retaining wall and hollowed through groove according to an embodiment of the present application;

FIG. 7 is a schematic structural view of another retaining wall and hollowed through groove according to an embodiment of the present application;

FIG. 8 is a schematic structural view of another retaining wall and hollowed through groove according to an embodiment of the present application;

FIG. 9 is a schematic illustration of a cross-sectional configuration as in the direction of FIG. 8A-A of an embodiment of the present application.

100, a display device; 200. a display panel; 300. a drive circuit board; 210. a substrate; 220. a first metal layer; 221. a common bus; 222. a hollow-out section; 226. hollowing out the through groove; 2210. a first through groove group; 2212. a second through slot group; 2213. a third tee joint groove group; 223. a connecting portion; 227. a connecting wire; 224. a first common bus; 225. a second common bus; 230. a first insulating layer; 240. a second metal layer; 241. retaining walls; 242. a first retaining wall; 243. a second retaining wall; 270. a second insulating layer; 280. a transparent conductive layer; 250. a display area; 260. a non-display area.

Detailed Description

It is to be understood that the terminology, the specific structural and functional details disclosed herein are for the purpose of describing particular embodiments only, and are representative, but that the present application may be embodied in many alternate forms and should not be construed as limited to only the embodiments set forth herein.

In the description of the present application, the terms "first", "second" are used for descriptive purposes only and are not to be construed as indicating relative importance or as implicitly indicating the number of technical features indicated. Thus, unless otherwise specified, a feature defined as "first" or "second" may explicitly or implicitly include one or more of that feature; "plurality" means two or more. The terms "comprises" and "comprising," and any variations thereof, are intended to cover a non-exclusive inclusion, such that one or more other features, integers, steps, operations, elements, components, and/or combinations thereof may be present or added.

Further, terms of orientation or positional relationship indicated by "center", "lateral", "upper", "lower", "left", "right", "vertical", "horizontal", "top", "bottom", "inner", "outer", and the like, are described based on the orientation or relative positional relationship shown in the drawings, are simply for convenience of description of the present application, and do not indicate that the referred device or element must have a specific orientation, be constructed and operated in a specific orientation, and thus, should not be construed as limiting the present application.

Furthermore, unless expressly stated or limited otherwise, the terms "mounted," "connected," and "connected" are to be construed broadly and may include, for example, fixed connections, removable connections, and integral connections; can be mechanically or electrically connected; either directly or indirectly through intervening media, or through both elements. The specific meaning of the above terms in the present application can be understood by those of ordinary skill in the art as appropriate.

LCD (Liquid Crystal Display) has many advantages such as thin body, power saving, and no radiation, and is widely used. The liquid crystal display device is mostly a backlight type liquid crystal display device, and includes a liquid crystal display panel and a backlight module. Generally, a Liquid Crystal display panel is composed of a CF (Color Film), a TFT (Thin Film Transistor), an LC (Liquid Crystal) between the Color Film and the TFT, and a Seal (Seal); in general, an alignment film is respectively disposed on the thin film transistor substrate and the color filter substrate, and after the alignment film contacts with the LC, the alignment film can make the LC generate a pretilt angle in a certain direction, so as to provide an angle for liquid crystal molecules (the pretilt angle has an important influence on driving voltage, contrast, response time, viewing angle, and the like of the TFT-LCD), and the alignment film is usually formed by applying PI (Polyimide) material onto the substrate.

In the liquid crystal segment process of the liquid crystal display panel, the PI alignment film is a medium for the alignment of liquid crystal molecules. In order to prevent PI overflow, a ring of PI retaining wall is added on the periphery of the PI at the CF side. And at the TFT side, the PI has no retaining wall, so that the PI is easy to overflow to the frame glue to pollute the frame glue and influence the solidification of the frame glue.

As shown in fig. 1, the array substrate 210 sequentially includes a display region 250, a non-display region 260, a diffused PI solution, a common bus 221, and a sealant from inside to outside, so as to prevent the phenomenon that the adhesive force of the sealant is deteriorated and bubbles occur due to the overlapping of the PI solution and the sealant; therefore, the coating accuracy of the PI liquid is very high, and the PI coating process faces the diffusion phenomenon after PI coating. The common bus 221 does not function sufficiently to prevent the PI liquid from spreading, and a retaining wall 241 needs to be provided at a portion of the common bus 221 to enhance the function of blocking the PI liquid from spreading. In the display panel, the sealant coating area of the non-display area 260 is usually not provided with a barrier layer, and the edge of the alignment layer is surrounded by the provided common line, so as to prevent a part of PI (Polyimide) liquid from overflowing from the edge of the alignment layer.

The effect of the common line for blocking the PI liquid is poor, and part of the PI liquid still flows to the frame glue by crossing the common line, so that the quality of the liquid crystal is influenced.

The application is further described with reference to the drawings and alternative embodiments.

As shown in fig. 1 in combination with fig. 2 and fig. 3, an embodiment of the present application discloses a display device 100 including a driving circuit board 300 and a display panel 200. The display panel 200 is divided into a display area 250 and a non-display area 260, the display panel 200 includes a substrate 210, a common bus 221 and a retaining wall 241, and an active switch for controlling the display of the display panel 200 is formed on the substrate 210; the common bus 221 is formed on the substrate 210 and located in the non-display region 260 of the display panel 200; and a retaining wall 241 is located above the common bus 221; wherein the common bus 221 includes a hollow portion 222 and a connection portion 223 surrounding the hollow portion 222; the retaining wall 241 is correspondingly arranged on the common bus 221.

In the application, a groove is formed in the public bus 221 of the substrate 210 and cooperates with the retaining wall 241 to block the setting of the PI liquid, specifically, in order to reduce the diffusion of the PI liquid out of the public bus 221, a part of the public bus 221 is hollowed out to form a plurality of hollowed-out portions 222, the hollowed-out portions 222 are equivalent to grooves, the upper surfaces of the hollowed-out portions 222 are lower than the upper surface of the public bus 221, when the PI liquid flows through the public bus 221, a part of the PI liquid flows into the hollowed-out portions 222, and can store a part of the PI liquid, so that the trend that the PI liquid continues to flow out of the public bus 221 is reduced, and the retaining wall 241 is correspondingly arranged on the public bus 221, so that the depth and the capacity of the groove are correspondingly increased, the difficulty of the PI liquid flowing out of the public bus 221 is improved, the diffusion overflow of the PI liquid is effectively blocked, the PI liquid flows to the.

The substrate 210 is an array substrate 210, but may also be a COA substrate 210.

The hollow part 222 comprises a plurality of hollow through grooves 226, and the plurality of hollow through grooves 226 are uniformly distributed; the plurality of hollow through slots 226 are arranged in a grid shape. The resistance value of the public bus 221 is not greatly influenced while the PI liquid is prevented from flowing back, the plurality of hollowed-out through grooves 226 block the PI liquid from overflowing and diffusing layer by layer, and the effect of blocking the PI liquid is improved.

As shown in fig. 3, the hollow through groove 226 is divided into a plurality of through groove groups 2210, each through groove group 2210 is uniformly distributed with a plurality of hollow through grooves 226 along the long side direction of the common bus 221, the hollow through groove 226 is a rectangular hollow through groove 226, and the long side direction of the rectangular hollow through groove 226 is the same as the long side direction of the common bus 221; a strip-shaped retaining wall 241 is arranged between the two through groove groups 2210. A retaining wall 241 is long-shaped and is arranged between every two through groove groups 2210, and the distribution direction of the retaining wall 241 is vertical to the diffusion direction of the PI liquid, so that the PI liquid can be effectively prevented from overflowing. Of course, as shown in fig. 4, a retaining wall 241 may be disposed in every third through groove set 2210.

As shown in fig. 5 in combination with fig. 3, the through groove set 2210 may include a first through groove set 2211, a second through groove set 2212 and a third through groove set 2213, a plurality of first retaining walls 242 are arranged between the first through groove set 2211 and the second through groove set 2212 at intervals, a plurality of second retaining walls 243 are arranged between the second through groove set 2212 and the third through groove set 2213 at intervals, the first retaining walls 242 and the second retaining walls 243 are staggered and connected by connecting walls to form a continuous arcuate retaining wall 241, similar to a right-angled folding shape, when PI solution passes through the hollowed through groove 226 and is blocked by the arcuate retaining wall 241, a buffering force is obtained to be distributed to both sides, thereby enhancing the resistance to PI solution diffusion.

As shown in fig. 6, the connection part 223 includes a plurality of connection lines 227 aligned with the longitudinal direction of the common bus 221, and the connection lines 227 are communicated with each other at both ends of the common bus 221; the connecting lines 227 are hollowed out to form a hollow-out portion 222 as a strip-shaped hollow-out through groove 226. The strip-shaped hollow through groove 226 can contain more PI liquid, and the impact force generated when the PI liquid flows is weakened layer by the multi-layer strip-shaped hollow through groove 226.

The retaining wall 241 is arranged above the connecting line 227 on one side of each strip-shaped hollow through groove 226, which is far away from the display area 250; the retaining wall 241 is a long strip, and the length of the retaining wall 241 is consistent with that of the common bus 221. In the process of PI liquid diffusion, a part of PI liquid is accommodated by the groove and the impact force is weakened by the groove, the PI with the reduced impact force touches the retaining wall 241 again, the possibility that the PI liquid crosses the retaining wall 241 or the impact force is reduced, and the PI liquid can be prevented from diffusing into the frame glue and influencing the solidification of the frame glue due to the weakening of the multiple layers of grooves and the retaining wall 241.

The common bus 221 includes a first common bus 224 disposed on a first side of the display panel 200, and a second common bus 225 disposed on a second side of the display panel 200, where the first common bus 224 and the second common bus 225 are communicated with each other, and a strip-shaped hollow through groove 226 corresponding to the first common bus 224 and a strip-shaped hollow through groove 226 corresponding to the second common bus 225 are communicated with each other. Wherein the first side and the second side are adjacent sides of the display panel 200; the first common bus 224 and the second common bus 225 form an L-shaped common bus 221, the L-shaped common bus 221 is provided with a plurality of L-shaped hollow through grooves 226, PI liquid is easy to accumulate at corners of the L-shaped common bus 221, the hollow through grooves 226 at the corners of the L-shaped common bus 221 can dredge the PI liquid flowing to the positions to two sides through the hollow through grooves 226, PI liquid accumulation and overflow are improved, the number of the common buses 221 arranged at the other two sides of the display panel 200 is small, and therefore the PI liquid can be blocked by retaining walls 241 in other arrangement modes; of course, the common bus 221 may be disposed on the other two sides of the display panel 200, and the hollow portion 222 and the retaining wall 241 may be correspondingly disposed.

As shown in fig. 7, the hollow portion 222 includes a plurality of isosceles triangle hollow through slots 226 uniformly arranged along the long side direction of the common bus 221, and/or a plurality of diamond hollow through slots 226 uniformly arranged along the long side direction of the common bus 221; the hollow part 222 hollows out the common bus 221 to form the connection part 223 in a twill grid shape; the retaining wall 241 is formed on the connection part 223, and the shape of the retaining wall 241 is a zigzag shape.

The hollowed-out through groove 226 with the bevel edge can enhance the buffering effect of PI liquid overflow, more PI liquid can be reserved in the hollowed-out through groove 226, each edge of the zigzag retaining wall 241 has a certain included angle, when the PI liquid flows through the hollowed-out through groove 226 to the zigzag retaining wall 241, the PI liquid can touch the sharp corner of the retaining wall 241 first, at the moment, the PI liquid is guided to be shunted to two sides, the impact direction of the PI liquid is dispersed, the buffering effect is achieved, the impact pressure of a subsequent groove and the retaining wall 241 can be weakened, the zigzag retaining wall 241 is difficult to pass through again, the total amount of the PI liquid impacting the retaining wall 241 is reduced, the PI liquid is difficult to flow through the retaining wall 241, and the PI liquid overflow degree is reduced.

As shown in fig. 8 and 9, the retaining wall 241 is formed above the connection part 223 and completely covers the connection part 223. The retaining wall 241 is located above the connecting portion 223, and the depth of the hollow through groove 226 is added, so that the section difference is correspondingly improved to the greatest extent, and the PI liquid is difficult to flow through the retaining wall 241. The retaining wall 241 may also partially cover the connecting portion 223.

The embodiment of the present application further discloses a display panel 200, wherein the display panel 200 is divided into a display area 250 and a non-display area 260, and includes a substrate 210, a first metal layer 220, a first insulating layer 230, a second metal layer 240 and a second insulating layer 270, and the substrate 210 is formed with an active switch for controlling the display of the display panel 200; the first metal layer 220 is formed on the substrate 210 and located in the non-display region 260 of the display panel 200; a first insulating layer 230 on the first metal layer 220; the second metal layer 240 is located on the first insulating layer 230; the second insulating layer 270 is located on the second metal layer 240; a common bus 221 is formed on the first metal layer 220, wherein the common bus 221 includes a hollow portion 222 and a connection portion 223 surrounding the hollow portion 222; the public bus 221 is hollowed to form the hollowed part 222; the second metal layer 240 forms a retaining wall 241 on the first insulating layer 230, and the retaining wall 241 is correspondingly disposed on the common bus 221; the connection part 223 includes a plurality of connection lines 227 aligned with the longitudinal direction of the common bus 221, and the connection lines 227 are communicated with each other at both ends of the common bus 221; the connecting lines 227 are hollowed out to form a hollow-out portion 222 as a strip-shaped hollow-out through groove 226. The retaining wall 241 is arranged above the connecting line 227 on one side of each strip-shaped hollow through groove 226, which is far away from the display area 250; the retaining wall 241 is a long strip, and the length of the retaining wall 241 is consistent with that of the common bus 221.

The substrate 210 is an array substrate 210, in order to reduce the diffusion of the PI liquid out of the common bus 221, a part of the common bus 221 is hollowed to form a plurality of hollowed-out portions 222, the hollowed-out portions 222 are equivalent to grooves, the upper surfaces of the hollowed-out portions 222 are lower than the upper surfaces of the common bus 221, when the PI liquid flows through the common bus 221, a part of the PI liquid flows into the hollowed-out portions 222, the part of the PI liquid can be stored, the tendency that the PI liquid continues to flow out of the common bus 221 is reduced, and the common bus 221 is further correspondingly provided with retaining walls 241, so that the difficulty of the PI liquid flowing out of the common bus 221 is improved, the PI liquid is effectively prevented from diffusing and overflowing, the PI liquid is prevented from flowing to the frame glue, the frame glue is prevented from being polluted. The first metal layer 220 forms a common bus 221 through etching, the first insulating layer 230 has an anti-corrosion insulating effect, the first insulating layer 230 is laid on the common bus 221, the second metal layer 240 is arranged on the first insulating layer 230 as a retaining wall 241, the second metal layer 240 can be made of metal materials such as copper and aluminum, the same materials or different materials are selected as the first metal layer 220, and can also be made of nonmetal materials, in order to improve the effect of preventing the PI liquid from overflowing, the shape of the hollow through groove 226 is changed slightly, the shape of the hollow through groove 226 is a long strip, the length direction of the long strip-shaped hollow through groove 226 is consistent with the routing arrangement direction of the common bus 221, firstly, the capacity of the hollow through groove 226 can be improved, more PI liquid can be contained, the buffering effect is improved, and secondly, most of non-hollow local areas formed by the long strip-shaped hollow through groove 226 are also long strip, the long retaining wall 241 is arranged on the upper surface and serves as a second protective barrier, and the extending direction of the retaining wall 241 is perpendicular to the overflowing direction of the PI liquid, so that the PI liquid is effectively prevented from overflowing.

In addition, the second insulating layer 270 is located on the second metal layer 240 to protect the second metal layer 240, the transparent conductive layer 280 is further disposed on the second metal layer, the transparent conductive layer 280 can also be used as a retaining wall, which is equivalent to increasing the height of the metal retaining wall and improving the capability of blocking the diffusion of the PI solution, the second metal layer 240 and the first metal layer 220 can be used together as a common bus, so as to reduce the resistance of the common bus, and the second metal layer 240 can also be used alone as a retaining wall without being communicated with the first metal layer 220.

The technical scheme of the present application can be widely applied to various display panels, such as TN (Twisted Nematic) display panel, IPS (In-Plane Switching) display panel, VA (Vertical Alignment) display panel, and MVA (Multi-Domain Vertical Alignment) display panel, and all of them can be applied to the above scheme.

The foregoing is a more detailed description of the present application in connection with specific alternative embodiments, and the present application is not intended to be limited to the specific embodiments shown. For those skilled in the art to which the present application pertains, several simple deductions or substitutions may be made without departing from the concept of the present application, and all should be considered as belonging to the protection scope of the present application.

Claims

1. A display panel divided into a display area and a non-display area, comprising:

a substrate on which an active switch for controlling display of the display panel is formed;

the public bus is formed on the substrate and is positioned in a non-display area of the display panel; and

a retaining wall located above the common bus;

wherein the common bus includes a hollowed-out portion and a connection portion surrounding the hollowed-out portion;

the retaining walls are correspondingly arranged on the public bus.

2. The display panel of claim 1, wherein the hollow portion comprises a plurality of hollow through grooves, and the plurality of hollow through grooves are uniformly arranged.

3. The display panel according to claim 2, wherein the hollow through grooves are divided into a plurality of through groove groups, each through groove group is provided with a plurality of hollow through grooves uniformly arranged along a long side direction of the common bus, the hollow through grooves are rectangular hollow through grooves, and the long side direction of the rectangular hollow through grooves is consistent with the long side direction of the common bus.

4. The display panel according to claim 1, wherein the connection portion includes a plurality of connection lines aligned in a longitudinal direction of the common bus line, the plurality of connection lines being communicated with each other at both ends of the common bus line;

and the adjacent two connecting wires are hollowed, and the formed hollowed parts are strip-shaped hollowed through grooves.

5. The display panel according to claim 4, wherein the retaining wall is disposed above the connecting line on a side of each of the strip-shaped hollow through grooves away from the display area;

the retaining wall is long-strip-shaped, and the length of the retaining wall is consistent with that of the public bus.

6. The display panel according to claim 3, wherein the common bus lines include a first common bus line disposed on a first side of the display panel and a second common bus line disposed on a second side of the display panel, the first common bus line and the second common bus line are in communication with each other, and the elongated through-slits corresponding to the first common bus line and the elongated through-slits corresponding to the second common bus line are in communication with each other.

7. The display panel according to claim 1, wherein the hollowed-out portion comprises a plurality of isosceles triangle hollowed-out through grooves uniformly arranged along the long side direction of the common bus, and/or a plurality of diamond hollowed-out through grooves uniformly arranged along the long side direction of the common bus;

the hollow parts hollow out the common buses to form the connecting parts in a twill grid shape;

the barricade is formed on the connecting portion, the shape of barricade is sawtooth shape.

8. The display panel according to claim 1, wherein the dam is formed above the connection portion and completely covers the connection portion.

9. A display panel divided into a display area and a non-display area, comprising:

the first metal layer is formed on the substrate and is positioned in a non-display area of the display panel;

a first insulating layer on the first metal layer;

a second metal layer on the first insulating layer;

the second insulating layer is positioned on the second metal layer;

the common bus is formed on the first metal layer and comprises a hollow part and a connecting part surrounding the hollow part; the public bus is hollowed to form the hollowed part; the second metal layer forms a retaining wall positioned on the first insulating layer, and the retaining wall is correspondingly arranged on the public bus;

the connecting part comprises a plurality of connecting wires consistent with the long side direction of the public bus, and the connecting wires are mutually communicated at two ends of the public bus;

hollowing between two adjacent connecting lines to form a hollow part which is a strip-shaped hollow through groove;

the retaining wall is arranged above the connecting line on one side, away from the display area, of each strip-shaped hollow through groove;

10. A display device comprising a driver circuit board and the display panel according to any one of claims 1 to 9.