CN109728194B - Display panel and display device - Google Patents
Display panel and display device Download PDFInfo
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- CN109728194B CN109728194B CN201811622759.8A CN201811622759A CN109728194B CN 109728194 B CN109728194 B CN 109728194B CN 201811622759 A CN201811622759 A CN 201811622759A CN 109728194 B CN109728194 B CN 109728194B
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Abstract
The invention discloses a display panel and a display device. The display panel comprises a display area, a non-display area and at least one notch, wherein the display area comprises a data line extending along a first direction, the edge of the display panel is sunken towards the inside of the display area along a second direction to form the notch, and the non-display area comprises a first non-display area adjacent to the notch; a substrate base plate; the array layer is positioned on the substrate base plate; the display layer is positioned on one side of the array layer, which is far away from the substrate and is positioned in the display area; the packaging structure is positioned on one side of the display layer far away from the array layer and comprises at least one organic packaging layer; the first non-display area is provided with a first retaining wall, a second retaining wall and a slow flow retaining wall, wherein the second retaining wall is located on one side, away from the display area, of the first retaining wall, the slow flow retaining wall is located on one side, close to the display area, of the first retaining wall, and the organic packaging layer is stopped on one side, close to the display area, of the first retaining wall. The invention can ensure the reliability of the packaging effect.
Description
Technical Field
The present invention relates to the field of display technologies, and in particular, to a display panel and a display device.
Background
In the conventional display device technology, the display panel is mainly divided into two mainstream technologies, namely a liquid crystal display panel and an organic self-luminous display panel. The liquid crystal display panel forms an electric field capable of controlling the deflection of liquid crystal molecules by applying voltage on the pixel electrode and the common electrode, and further controls the transmission of light rays to realize the display function of the display panel; the organic self-luminous display panel adopts an organic electroluminescent material, and when current passes through the organic electroluminescent material, the luminescent material can emit light, so that the display function of the display panel is realized.
The organic light emitting display panel has advantages of self-luminescence, ultra-thinness, high contrast, ultra-wide viewing angle, low power consumption, high display brightness, bright color, and capability of manufacturing flexible display, and the like, and is a key point of attention.
Therefore, it is an urgent technical problem to be solved in the art to provide a display panel and a display device with good performance reliability.
Disclosure of Invention
In view of this, the present invention provides a display panel and a display device, which solve the technical problem of improving performance reliability.
In order to solve the above technical problem, in a first aspect, the present invention provides a display panel, including a display area, a non-display area surrounding the display area, and at least one notch, where the display area includes a plurality of data lines extending along a first direction, an edge of the display panel is recessed towards an inside of the display area along a second direction to form the notch, the second direction is crossed with the first direction, the non-display area includes a first non-display area, and the first non-display area is adjacent to the notch; further comprising:
a substrate base plate;
the array layer is positioned on the substrate base plate;
the display layer is positioned on one side of the array layer, which is far away from the substrate base plate, and is positioned in the display area;
the packaging structure is positioned on one side of the display layer, which is far away from the array layer, and comprises at least one organic packaging layer; wherein the content of the first and second substances,
the first non-display area is provided with a first retaining wall, a second retaining wall and a slow flow retaining wall, wherein the second retaining wall is located on one side, away from the display area, of the first retaining wall, the slow flow retaining wall is located on one side, close to the display area, of the first retaining wall, and the organic packaging layer is stopped on one side, close to the display area, of the first retaining wall.
Based on the same inventive concept, in a second aspect, the invention provides a display device comprising any one of the display panels provided by the invention.
Compared with the prior art, the display panel and the display device provided by the invention at least realize the following beneficial effects:
according to the display panel provided by the invention, the first retaining wall, the second retaining wall and the slow flow retaining wall are arranged in the first non-display area adjacent to the notch, when the display panel is used for manufacturing the organic packaging layer in the packaging structure, the slow flow retaining wall can play a role of slow flow blocking on the liquid organic packaging layer material, when the liquid organic packaging layer material delays from the display area to the first non-display area, the slow flow retaining wall can slow down the flow rate of the liquid organic packaging layer material, and the organic packaging layer can be ensured to be stopped at one side of the slow flow retaining wall close to the display area or between the slow flow retaining wall and the first retaining wall, so that the liquid organic packaging layer material can be prevented from being concentrated in the first non-display area and then spreading to pass through the second retaining wall. The edge of the organic packaging layer is guaranteed to be stopped at one side, close to the display area, of the first retaining wall through the arrangement of the slow flow retaining wall, and the edge of the inorganic packaging layer manufactured in the packaging structure is usually stopped between the first retaining wall and the second retaining wall or at one side, far away from the display area, of the second retaining wall.
Other features of the present invention and advantages thereof will become apparent from the following detailed description of exemplary embodiments thereof, 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 top view of a display panel according to an embodiment of the present invention;
FIG. 2 is a schematic cross-sectional view taken along line A-A' of FIG. 1;
FIG. 3 is another schematic cross-sectional view taken at line A-A' of FIG. 1;
FIG. 4 is a schematic cross-sectional view taken at the location of line C-C' of FIG. 1;
FIG. 5 is a schematic top view of an alternative embodiment of a display panel according to an embodiment of the invention;
FIG. 6 is a schematic top view of a portion of an alternative embodiment of a display panel according to an embodiment of the present invention;
FIG. 7 is a schematic top view of a portion of another alternative embodiment of a display panel according to an embodiment of the present invention;
FIG. 8 is a schematic top view of another alternative embodiment of a display panel according to an embodiment of the present invention;
FIG. 9 is a schematic partial cross-sectional view of another alternative embodiment of a display panel according to an embodiment of the present invention;
FIG. 10 is a schematic top view of a portion of another alternative embodiment of a display panel according to an embodiment of the present invention;
FIG. 11 is a schematic top view of a portion of another alternative embodiment of a display panel according to an embodiment of the present invention;
FIG. 12 is a schematic top view of a portion of another alternative embodiment of a display panel according to an embodiment of the present invention;
FIG. 13 is a schematic top view of a portion of another alternative embodiment of a display panel according to an embodiment of the present invention;
FIG. 14 is a schematic cross-sectional view of a display area of an alternative embodiment of a display panel according to an embodiment of the present invention;
FIG. 15 is a schematic top view of a portion of the display panel shown in FIG. 14;
FIG. 16 is a schematic top view of another alternative embodiment of a display panel according to an embodiment of the present invention
FIG. 17 is a schematic cross-sectional view of another alternative embodiment of a display panel according to an embodiment of the present invention;
FIG. 18 is a partially enlarged schematic view of another alternative embodiment of a display panel according to an embodiment of the invention;
FIG. 19 is a schematic top view of another alternative embodiment of a display panel according to an embodiment of the present invention;
FIG. 20 is a schematic top view of another alternative embodiment of a display panel according to an embodiment of the present invention;
FIG. 21 is a partially enlarged schematic view of another alternative embodiment of a display panel according to an embodiment of the invention;
fig. 22 is a schematic view of a display device according to an embodiment of the present 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, the numerical expressions and numerical values set forth in these embodiments do not limit the scope of the present invention unless specifically stated otherwise.
The following description of at least one exemplary embodiment is merely illustrative in nature and is in no way intended to limit the invention, its application, or uses.
Techniques, methods, and apparatus known to those 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 particular value should be construed as merely illustrative, and not limiting. Thus, other examples of the exemplary embodiments may have different values.
It should be noted that: like reference numbers and letters refer to like items in the following figures, and thus, once an item is defined in one figure, further discussion thereof is not required in subsequent figures.
Fig. 1 is a schematic top view of a display panel according to an embodiment of the invention, and fig. 2 is a schematic cross-sectional view taken along line a-a' of fig. 1. Fig. 3 is another schematic cross-sectional view taken at the position of line a-a' of fig. 1. Fig. 4 is a schematic cross-sectional view at the position of line C-C' of fig. 1. Fig. 5 is a schematic top view of an alternative embodiment of a display panel according to an embodiment of the invention.
As shown in fig. 1, the display panel includes a display area AA, a non-display area BA disposed around the display area AA, and at least one notch K, where the display area AA includes a plurality of data lines D (the number of the data lines is only schematically indicated in the figure) extending along a first direction a, and an edge B of the display panel is recessed toward the inside of the display area AA along a second direction B to form the notch K, where the edge B is an edge extending along the first direction a before being recessed toward the inside of the display area AA, and the second direction B intersects the first direction a, and optionally, the first direction a and the second direction B are perpendicular to each other. The non-display area BA includes a first non-display area BA1, and the first non-display area BA1 is adjacent to the notch K. The display panel may have two or more notches K, and fig. 1 is only schematically illustrated as having one notch K.
The display panel shown in fig. 2 includes a substrate base plate 101; the array layer 102 is located on the substrate base plate 101; the display layer 103 is located on one side of the array layer 102 away from the substrate base plate 101 and located in the display area AA; the encapsulation structure 104, located on the side of the display layer 103 away from the array layer 102, includes at least one organic encapsulation layer 104Y. Optionally, the package structure 104 further includes a first inorganic encapsulation layer 104W1 and a first inorganic encapsulation layer 104W2, the organic encapsulation layer 104Y is located between the first inorganic encapsulation layer 104W1 and the first inorganic encapsulation layer 104W2, and the cut-off positions of the edges of the first inorganic encapsulation layer 104W1 and the first inorganic encapsulation layer 104W2 are also only schematically shown. The first inorganic encapsulation layer 104W1 may be cut off between the first wall Q1 and the second wall Q2, or on the side of the second wall Q2 away from the display area AA. The second inorganic encapsulation layer 104W2 may be cut off between the first wall Q1 and the second wall Q2, or on the side of the second wall Q2 away from the display area AA. Alternatively, the display layer 103 includes a plurality of light emitting devices (not shown), which may be organic light emitting devices.
Referring to fig. 1 and fig. 2, a first retaining wall Q1, a second retaining wall Q2 and a slow flow retaining wall HQ are disposed in the first non-display area BA1, wherein the second retaining wall Q2 is located on a side of the first retaining wall Q1 away from the display area AA, the slow flow retaining wall HQ is located on a side of the first retaining wall Q1 close to the display area AA, and the organic encapsulation layer 104Y is stopped on a side of the first retaining wall Q1 close to the display area AA. The cut-off position of the organic encapsulation layer 104Y may be different at different positions of the first non-display area BA1, and a case where the edge of the organic encapsulation layer 104Y is cut off between the first retaining wall Q1 and the slow flow retaining wall HQ is shown in fig. 2. Alternatively, the edge of the organic encapsulation layer 104Y shown in fig. 3 may also be stopped at the side of the slow flow retaining wall HQ close to the display area AA. In the first non-display area BA1 of the display panel, the edge of the organic encapsulation layer 104Y may be stopped between the first retaining wall Q1 and the slow flow retaining wall HQ in some areas, and the edge of the organic encapsulation layer 104Y may be stopped on the side of the slow flow retaining wall HQ near the display area AA in other areas.
In fig. 1, the shape of the notch K is a rectangle, and optionally, the shape of the notch K may also be a triangle or other shapes. As shown in fig. 3, the notch K of the display panel may have a semicircular shape.
Optionally, the extending direction of the slow flow retaining wall is the same as the extending direction of the edge of the notch. Namely, a slow flow retaining wall HQ is provided along the edge B of the notch K in the first non-display area BA1 as illustrated in fig. 1 and 3.
It should be noted that fig. 1 and fig. 5 only illustrate a portion of the first retaining wall Q1 and the second retaining wall Q2 in the non-display area BA, and in practice, in order to ensure the encapsulation effect of the encapsulation structure on the display layer, in a top view of the display panel, the first retaining wall Q1 may be a closed figure surrounding the display area AA, and the second retaining wall Q2 may also be a closed figure surrounding the display area AA. Fig. 4 is a schematic cross-sectional view of the non-display region at another position in the display panel, where the edge of the organic encapsulation layer 104Y is cut off by the first retaining wall Q1 to be close to the display region AA. The first inorganic encapsulation layer 104W1 and the first inorganic encapsulation layer 104W2 of the package structure 104 are both cut off on the side of the second barrier Q2 away from the display area AA. When the display panel is cut, the second retaining wall Q2 is close to the cutting edge, and the inorganic packaging layer may crack due to large cutting stress during cutting, the second retaining wall Q2 arranged in the invention can prevent the crack generated by the inorganic packaging layer from extending into the display area AA to a certain extent, so that the crack of the inorganic packaging layer is prevented from being blocked at the position of the second retaining wall Q2, the crack is prevented from extending to the area where the organic packaging layer 104Y is located, the invasion of water and oxygen can be well prevented, and the packaging effect is ensured.
When the encapsulation structure is fabricated on the display layer, the organic encapsulation layer is usually fabricated by an inkjet printing method, and is in a flowable liquid state at an initial stage, the liquid organic encapsulation layer material may spread toward the non-display region, and when the display panel is in a regular shape (such as a rectangle), the liquid organic encapsulation layer material may uniformly spread toward the peripheral non-display region. In the display panel with the notch, the display panel is in an irregular shape due to the existence of the notch, when the organic packaging layer material spreads towards the first non-display area adjacent to the notch, a large amount of liquid organic packaging layer material can be concentrated in the first non-display area, the edge of the organic packaging layer possibly exceeds the preset edge position, the inorganic packaging layer in the packaging structure cannot effectively coat the organic packaging layer, the packaging effect of the packaging structure is influenced, and the performance of the display panel is further influenced.
According to the display panel provided by the invention, the first retaining wall, the second retaining wall and the slow flow retaining wall are arranged in the first non-display area adjacent to the notch, when the display panel is used for manufacturing the organic packaging layer in the packaging structure, the slow flow retaining wall can play a role of slow flow blocking on the liquid organic packaging layer material, when the liquid organic packaging layer material delays from the display area to the first non-display area, the slow flow retaining wall can slow down the flow rate of the liquid organic packaging layer material, and the organic packaging layer can be ensured to be stopped at one side of the slow flow retaining wall close to the display area or between the slow flow retaining wall and the first retaining wall, so that the liquid organic packaging layer material can be prevented from being concentrated in the first non-display area and then spreading to pass through the second retaining wall. The edge of the organic packaging layer is guaranteed to be stopped at one side, close to the display area, of the first retaining wall through the arrangement of the slow flow retaining wall, and the edge of the inorganic packaging layer manufactured in the packaging structure is usually stopped between the first retaining wall and the second retaining wall or at one side, far away from the display area, of the second retaining wall. In the invention, the extending direction of the slow flow retaining wall arranged in the first non-display area is the same as the extending direction of the edge of the notch, namely, the slow flow retaining wall is in a non-closed shape and is only arranged in the first non-display area adjacent to the notch. The first retaining wall and the second retaining wall can be arranged in other non-display areas of the display panel as shown in fig. 4, the boundary of a normal display area (a display area which is not adjacent to the first non-display area) in the display panel is basically in a regular shape, when the organic packaging layer is manufactured, the liquid organic packaging layer material is uniformly diffused from the display area to the non-display area, at the moment, the first retaining wall can be used for blocking the organic packaging layer and ensuring that the organic packaging layer is stopped in the first retaining wall, meanwhile, the second retaining wall is arranged for preventing cracks of the inorganic packaging layer caused by cutting stress from extending to an area where the organic packaging layer is located, and good packaging effect can be ensured by arranging the two retaining walls. Assume that in other non-display areas not adjacent to the gap: the slow flow retaining wall is also arranged on one side, close to the display area, of the first retaining wall, so that the space of the non-display area is occupied, the frame is widened, the overall size of the display panel (including the size of the display area and the size of the whole non-display area) is increased, and the screen occupation ratio of the display panel is also influenced. In the invention, the slow flow retaining wall is only arranged in the first non-display area adjacent to the notch, and the slow flow retaining wall only causes the notch to be reduced after the width of the first non-display area is increased, so that the overall size of the display panel is not influenced. In addition, the notch arranged in the invention is equivalent to the recess of the non-display area towards the inside of the display area, the shape of the boundary of the display area adjacent to the first non-display area is approximately the same as the edge shape of the notch, when the organic packaging layer is manufactured, the liquid organic packaging material is easy to intensively spread at the position, the slow flow retaining wall is arranged for slowing down the flow rate of the organic packaging material, and the organic packaging layer is ensured to be stopped at one side of the first retaining wall close to the display area, so that the reliability of the packaging effect is ensured.
In addition, in the display panel with the notch, the mask plate used in manufacturing the display layer (such as used in a cathode layer manufacturing process or other organic film layer manufacturing processes) can be correspondingly deformed and designed at the notch position to adapt to the shape of the notch, and due to the influence of the manufacturing precision and the alignment precision of the mask plate in the film layer evaporation process, the mask plate near the notch has a large scratch on a pixel definition layer in the display panel, which may further cause packaging failure. Meanwhile, after the slow flow retaining wall is arranged in the first non-display area, three retaining walls including the first retaining wall, the second retaining wall and the slow flow retaining wall are arranged in the first non-display area, and the height fluctuation of each packaging film layer (including an organic packaging layer and an inorganic packaging layer) in the packaging structure can be increased, so that the adhesion between each packaging film layer and the array layer can be increased, and the film layer stripping phenomenon in the packaging structure when the area around the notch is bent is avoided.
With continued reference to FIG. 2, the slow flow retaining wall HQ has a first surface M1 on the side away from the substrate base plate 101, the first surface M1 being at a distance d1 from the substrate base plate 101; the first retaining wall Q1 has a second surface M2 on the side away from the substrate base plate 101, the second surface M2 is at a distance d2 from the substrate base plate 101; the second barrier Q2 has a third surface M3 on the side away from the substrate base 101, and the distance from the third surface M3 to the substrate base 101 is d 3; wherein d1 is not less than d2, and d1 is not less than d 3. Optionally, d2 and d3 may be equal or unequal. In fig. 2, d1, d2, and d3 are each calculated as a distance from the surface of the substrate base 101 on the side close to the array layer 102. In this embodiment, the display panel is provided with first barricade, second barricade and slow flow barricade in the first non-display area adjacent with the breach, and when making organic encapsulation layer, the slow flow barricade can play the effect that the slow flow blockked to liquid organic encapsulation layer material, can slow down the velocity of flow of liquid organic encapsulation layer material, guarantees that organic encapsulation layer can end at the slow flow barricade and is close to display area one side, perhaps ends between slow flow barricade and first barricade. The packaging structure can ensure that the inorganic packaging layer in the packaging structure effectively coats the organic packaging layer, and can ensure the reliability of the packaging effect. Meanwhile, the distance between the slow flow retaining wall and the substrate base plate is smaller than or equal to the distance between the first retaining wall and the substrate base plate, and smaller than or equal to the distance between the second retaining wall and the substrate base plate, and the slow flow retaining wall can delay the flow rate of the liquid organic packaging layer material, so that the slow flow retaining wall does not influence the whole thickness of the display panel, and the thinning requirement of the display panel is met. If the height of the slow flow retaining wall is higher than that of the first retaining wall and the second retaining wall, excessive interception of the organic encapsulating material is caused at the position of the slow flow retaining wall, excessive accumulation of the organic encapsulating material at the position of the slow flow retaining wall is caused, and the height of the organic encapsulating material relative to the substrate is caused to be higher than that of the first retaining wall and the second retaining wall. Therefore, d1 is not less than d2, and d1 is not less than d3 in this embodiment, which can avoid the above-mentioned situation, ensure that the slow flow retaining wall can slow down the flow rate of the organic encapsulating material, and avoid the organic encapsulating material from being excessively accumulated at the position of the slow flow retaining wall.
In addition, set up the slow flow barricade in the first non-display area adjacent with the breach in this embodiment, in the rete coating by vaporization technology in the preparation display layer, the slow flow barricade can be used for supporting the mask plate to avoid the mask plate to cause the fish tail to pixel definition layer. Meanwhile, after the slow flow retaining wall is arranged in the first non-display area, three retaining walls including the first retaining wall, the second retaining wall and the slow flow retaining wall are arranged in the first non-display area, and the height fluctuation of each packaging film layer (including an organic packaging layer and an inorganic packaging layer) in the packaging structure can be increased, so that the adhesion between each packaging film layer and the array layer can be increased, and the film layer stripping phenomenon in the packaging structure when the area around the notch is bent is avoided.
In an embodiment, fig. 6 is a schematic partial top view of an alternative embodiment of the display panel according to an embodiment of the present invention, as shown in fig. 6, the slow flow retaining wall HQ has at least one first fracture DK1, and the slow flow retaining wall HQ is discontinuous at the first fracture DK 1. In this embodiment, the slow flow retaining wall is a discontinuous structure, and when the organic encapsulation layer is manufactured, and the liquid organic encapsulation layer material is spread to the position of the slow flow retaining wall from the display area, part of the organic encapsulation layer material passes through the slow flow retaining wall from the first fracture and then spreads to the first retaining wall, and part of the organic encapsulation layer material turns over the slow flow retaining wall and then spreads to the first retaining wall. The arrangement of the first fracture is equivalent to being capable of eliminating excessive aggregation of the organic encapsulating layer material in a local area, for example, the instantaneous impact force which is possibly larger when a large amount of liquid organic encapsulating layers are aggregated together to break through a continuous slow flow retaining wall, and after the first fracture is arranged, part of the organic encapsulating layer material passes through the slow flow retaining wall through the first fracture, which is equivalent to dispersing part of the impact force, and the flow speed of the organic encapsulating layer after passing through the slow flow retaining wall is slowed down. In addition, the setting of first fracture is guaranteeing that the slow flow barricade is to the organic encapsulation layer slow flow effect the time, also can reduce the preparation material of slow flow barricade, is favorable to saving the cost of manufacture. In addition, the slow flow retaining wall is arranged into a discontinuous structure in the first non-display area, and when the notch position of the display panel is bent, the first fracture can provide a bending path, so that the bending gravitation borne by the display panel is reduced, and the bending resistance at the notch position is improved. The notch is equivalent to the recess from the non-display area to the inside of the display area, the boundary shared by the display area adjacent to the first non-display area and the first non-display area is recessed to the inside of the display area, when the organic packaging layer is manufactured, the liquid organic packaging material spreads from the display area to the peripheral non-display area, and the amount of the organic packaging material spreading to the first non-display area is more than that spreading to other non-displays, so that the organic packaging material is easily accumulated at the position of the slow flow retaining wall after being intercepted by the slow flow retaining wall.
Alternatively, as shown with continued reference to fig. 5 described above, the density of the first fractures DK1 in the region Z1 may be set higher than the density of the first fractures DK1 in the region Z2 in the slow flow retaining wall HQ, wherein the region Z1 is closer to the center of the display area AA in the second direction b than the region Z2. The setting density refers to the number of first fractures in a unit distance along the extending direction of the slow flow retaining wall.
Alternatively, the total length of the plurality of first fractures provided in the region Z1 of the slow flow retaining wall HQ may be greater than the total length of the plurality of first fractures DK1 in the region Z2. The total length of the first interruption DK1 is the total length of a plurality of first interruptions per unit distance along the extension direction of the slow flow retaining wall. When the organic packaging layer is manufactured, the position of the region Z1 is closer to the center of the display region AA, the amount of the organic packaging material intercepted by the slow flow retaining wall HQ at the position is more than that of the slow flow retaining wall HQ at the position of the region Z2, namely, the accumulation of the organic packaging material is more easily caused at the position of the region Z1.
In an embodiment, fig. 7 is a schematic partial top view of another alternative embodiment of the display panel according to the embodiment of the present invention, as shown in fig. 7, the first retaining wall Q1 has at least one second fracture DK2, the first retaining wall Q1 is discontinuous at the second fracture, and the slow flow retaining wall HQ points to the direction of the first retaining wall Q1: the second discontinuity DK2 does not overlap with the first discontinuity DK 1. In the embodiment, the arrangement of the first fracture can eliminate excessive accumulation of the organic encapsulating layer material in a local area, the first fracture and the second fracture are not overlapped, and part of the organic encapsulating layer material passing through the slow flow retaining wall from the first fracture can be stopped by the first retaining wall, so that the slow flow effect on the liquid organic encapsulating layer material caused by the overlapping of the first fracture and the second fracture is prevented from being weakened. In addition, the arrangement of the first fracture and the second fracture can reduce the use of manufacturing materials of the slow flow retaining wall and the first retaining wall, and the manufacturing cost is saved. In addition, the first fracture and the second fracture that set up in a staggered manner all can release bending stress to promote display panel's resistant bending performance, the first fracture and the second fracture that set up in a staggered manner can block the extension passageway of bending crack respectively in a plurality of positions moreover, avoid the crack to extend to the display area, and this embodiment can further increase the separation ability of water oxygen. The slow flow retaining wall in the first non-display area is far away from one side of the array layer, and metal wires may need to be arranged, due to the fact that after the structures of the first retaining wall, the second retaining wall and the slow flow retaining wall are arranged, a fault exists in the first non-display area, and wire breakage or circuit breaking of the metal wires is easily caused.
In an embodiment, fig. 8 is a schematic top view of another alternative implementation of the display panel according to the embodiment of the present invention, as shown in fig. 8, the non-display area BA further includes a second non-display area BA2, the second non-display area BA2 is adjacent to the first non-display area BA1 and is not adjacent to the notch K; an extended retaining wall YQ extending in the first direction a is disposed in the second non-display area BA2, and the extended retaining wall YQ is connected to the slow flow retaining wall HQ. As shown in fig. 8, the display panel includes two second non-display areas BA2, and the extended barriers YQ may be provided only in the second non-display area BA2 on one side, or in both of the two second non-display areas BA 2. In this embodiment, a slow flow retaining wall is first disposed in the first non-display area, and the slow flow retaining wall can slow down the flow rate of the liquid organic encapsulation layer, so as to ensure that the organic encapsulation layer can be stopped at one side of the slow flow retaining wall close to the display area, or between the slow flow retaining wall and the first retaining wall, and the edge of the inorganic encapsulation layer manufactured in the encapsulation structure is usually stopped between the first retaining wall and the second retaining wall, or at one side of the second retaining wall far from the display area. Secondly set up in the second non-display area and extend the barricade, it is connected with the slow flow barricade to extend the barricade, extend the barricade and can play the effect that slows down the velocity of flow of liquid organic packaging layer material equally, guarantee also can effectually slow down the velocity of flow of organic packaging layer in the position adjacent with first non-display area, avoid causing the concentrated of liquid organic packaging layer to spread in the position that first non-display area and second non-display area are connected, thereby further guaranteed that organic packaging layer can end near display area one side at first barricade, and then guarantee the reliability of encapsulation effect. In the display panel with the notch provided by the invention, the non-display area is sunken towards the inside of the display area due to the notch, namely the first non-display area is sunken towards the inside of the display area, when the organic encapsulation layer is manufactured, the liquid organic encapsulation material spreads from the display area to the peripheral non-display area, the liquid organic encapsulation material firstly spreads to the first non-display area and is intercepted by the slow flow retaining wall, the amount of the organic encapsulation material intercepted in the first non-display area is more than that of other non-display areas, and under the condition that the extension retaining wall is not arranged, a large amount of the organic encapsulation material intercepted by the slow flow retaining wall can be poured out at the stopping position of the slow flow retaining wall (the slow flow retaining wall is in a non-closed design, so that an edge, namely the stopping position exists certainly) to cause the organic encapsulation material to overflow the first retaining wall. In the invention, the extending retaining wall extending into the second non-display area is arranged, so that the organic packaging material intercepted by the slow flow retaining wall in the first non-display area can be extended into the second non-display area along the extending retaining wall, thereby sharing part of the organic packaging material piled by the slow flow retaining wall through the second non-display area adjacent to the first non-display area. Meanwhile, the length of the extended retaining wall can be properly adjusted, and the occupation of excessive second non-display area is avoided. With continued reference to FIG. 8, the length of the extended wall YQ in the first direction is d4, where d4 is 10 μm or less and 200 μm or less. As shown in fig. 8, the display panel includes two second non-display areas BA2, and it should be noted that the lengths of the extended retaining walls YQ disposed in the two second non-display areas BA2 may be equal or unequal. In this embodiment, set up in the second non-display area and extend the barricade, extend the barricade and be connected with the slow flow barricade, extend the barricade and can play the effect that slows down the velocity of flow of liquid organic packaging layer material equally, avoid causing the concentrated of liquid organic packaging layer to spread in the position that first non-display area and second non-display area are connected to it can end at first barricade near display area one side to have further guaranteed organic packaging layer, and then guarantees the reliability of encapsulation effect. The length that sets up the barricade of extending simultaneously satisfies certain limit, avoids extending the length undersize of barricade to the ability undersize that slows down of organic encapsulation layer velocity of flow, avoids extending the length overlength of barricade simultaneously, leads to extending the barricade and occupy the space too big in the second non-display area.
In an embodiment, fig. 9 is a schematic partial cross-sectional view of another alternative embodiment of the display panel according to the embodiment of the present invention, as shown in fig. 9, a slow flow groove HC is further disposed in the first non-display area BA1, the slow flow groove HC is located in the array layer 102, a notch of the slow flow groove HC is located on a surface of the array layer 102 on a side away from the substrate base plate 101, and a projection of the slow flow groove HC on the substrate base plate 101 is a first projection; the projection of the first retaining wall Q1 on the substrate base plate 101 is a second projection, the projection of the boundary of the display area AA on the substrate base plate 101 is a third projection, and the first projection is located between the second projection and the third projection. It should be noted that the orthographic projection onto the substrate is a projection in a direction perpendicular to the display panel, and when the display panel is viewed in the direction e in fig. 9, the slow flow groove HC coincides with the first projection, the first wall Q1 coincides with the second projection, and the boundary of the display area AA coincides with the third projection, so the first projection, the second projection, and the third projection are not marked in fig. 9. When the display panel is viewed in the direction e, the slow flow groove HC is located between the first wall Q1 and the boundary of the display area AA. The boundary of the display area AA is a boundary of an area that can be used for display in the display panel, the area that can be used for display in the display panel is provided with a plurality of pixels, and the boundary of the display area AA is a boundary between a non-display area formed by edges of a plurality of pixels adjacent to the non-display area and adjacent to the non-display area. In this embodiment, set up the unhurried current barricade in the first non-display area adjacent with the breach, the unhurried current barricade can slow down the velocity of flow of liquid organic packaging layer material, guarantees that organic packaging layer can end near display area one side at the unhurried current barricade, perhaps ends between unhurried current barricade and first barricade to can avoid liquid organic packaging layer material to cause in first non-display area to concentrate the back and stretch the second barricade. The invention can ensure that the inorganic packaging layer in the packaging structure effectively coats the organic packaging layer and can ensure the reliability of the packaging effect. In addition, still be provided with the unhurried current recess at the array layer, the unhurried current recess is located between the border of unhurried current barricade and display area, and when the organic encapsulation layer of preparation, the liquid organic encapsulation layer need flow through the unhurried current recess at first just can reach the unhurried current barricade, has certain space in the unhurried current recess, can guarantee that partial organic encapsulation layer material is filled in the unhurried current recess, then just can stretch to the direction of unhurried current barricade. In addition, after the slow flow groove is arranged in the first non-display area, the flow speed of the organic packaging material can be further slowed down, the organic packaging material is ensured to uniformly spread in the first non-display area, and the phenomenon that the thickness of the organic packaging layer is uneven after film forming due to local accumulation (namely, the thickness of the slow flow retaining wall is higher in a region and the thickness of other regions is lower) to cause line breakage or short circuit due to uneven film coating when other film layer structures are manufactured on the organic packaging layer is avoided. In addition, due to the fact that a plurality of retaining wall structures are arranged in the first non-display area, breaking difference exists on the packaging structure of the first non-display area, and disconnection or open circuit of metal wires is easily caused, when layer changing routing is needed for metal routing, incomplete punching process or over-etching of the punching process may occur.
In the display panel, a plurality of boundaries exist between the boundary of the display area and the first bank, such as the boundary of the cathode layer, the boundary of the pixel definition layer, the boundary of the peripheral circuit, and the like, and fig. 10 is a partial top view schematic diagram of another alternative embodiment of the display panel according to the embodiment of the present invention. As shown in fig. 10, the first non-display area BA1 of the display panel includes a boundary of the cathode layer (a first boundary J1), a region where the peripheral circuit Z is located, and a boundary of the pixel defining layer, where the pixel defining layer includes at least two boundaries (a second boundary J2 and a third boundary J3, it should be noted that the second boundary J2 and the third boundary J3 are only used as names and do not represent the second boundary and the third boundary of the pixel defining layer), wherein a PDL island is formed in a region O between the second boundary J2 and the third boundary J3, that is, the pixel defining layer is patterned in the region O, and the cathode layer is electrically connected to the underlying metal cathode layer in the region O, so that the metal trace can apply a voltage signal to the metal cathode layer. The second boundary J2 is the boundary of the PDL island on the side close to the display area AA, and the third boundary J3 is the boundary of the PDL island on the side far from the display area AA. Alternatively, the pixel defining layer may further have a fourth boundary J4, i.e., a boundary naturally formed when the pixel defining layer is laid over the entire surface, and when the pixel defining layer is patterned to form the PDL island, the fourth boundary J4 may be etched away so that only the second boundary J2 and the third boundary J3 of the pixel defining layer exist within the first non-display area BA 1; or, the fourth boundary J4 may not be etched so that the second boundary J2, the third boundary J3, and the fourth boundary J4 exist within the first non-display area BA 1.
In an embodiment, fig. 11 is a schematic partial top view of another alternative implementation of a display panel according to an embodiment of the present disclosure. As shown in fig. 11, the slow flow groove HC is located between the second boundary J2 of the pixel defining layer and the slow flow retaining wall HQ. Fig. 11 only schematically shows one slow flow groove HC, and alternatively, the display panel may have a plurality of slow flow grooves at the same time. The slow current groove is located in an array layer of the display panel, the pixel definition layer is manufactured in a manufacturing process of the display layer, namely the pixel definition layer is located on the array layer, a top view in fig. 11 is that the slow current groove HC is viewed in a direction perpendicular to the display panel, and the slow current groove HC may be overlapped with the PDL island region O.
In an embodiment, fig. 12 is a schematic partial top view of another alternative implementation of a display panel according to an embodiment of the disclosure. As shown in fig. 12, the slow flow groove HC is located between the third boundary J3 of the pixel defining layer and the slow flow retaining wall HQ.
In an embodiment, fig. 13 is a schematic partial top view of another alternative implementation of the display panel according to the embodiment of the present disclosure. As shown in fig. 13, the slow flow groove HC is located between the fourth boundary J4 of the pixel defining layer and the slow flow retaining wall HQ.
In an embodiment, fig. 14 is a schematic cross-sectional view of a display area of another alternative implementation of the display panel according to the embodiment of the present disclosure. Fig. 15 is a schematic top view of a partial region of the display panel shown in fig. 14, where as shown in fig. 14, the display layer 103 includes a cathode layer 1031, a light emitting layer 1032, and an anode layer 1033, and the display layer 103 may further include at least one of a Hole Injection Layer (HIL), a Hole Transport Layer (HTL), an Electron Transport Layer (ETL), and an Electron Injection Layer (EIL).
As shown in fig. 15, the cathode layer 1031 includes a first boundary J1 located in the first non-display area BA1, a projection of the first boundary J1 on the substrate base is a fourth projection Y4, and a projection of the slow flow groove HC on the substrate base is a first projection Y1; the projection of the boundary of the display area AA on the substrate base plate is a third projection Y3, and the first projection Y1 is located between the fourth projection Y4 and the third projection Y3. In this embodiment, through set up the unhurried current barricade in the first non-display area adjacent with the breach, the speed of flow that the liquid organic packaging layer material can be slowed down to the barricade of slowly flowing, guarantees that organic packaging layer can end first barricade and be close to display area one side, can guarantee the effectual organic packaging layer of cladding of the inorganic packaging layer among the packaging structure, can guarantee the reliability of encapsulation effect. In addition, the array layer is also provided with a slow flow groove between the slow flow retaining wall and the boundary of the display area, so that the flow speed of the liquid organic packaging layer material can be further slowed down, and the organic packaging layer can be ensured to be stopped at one side of the first retaining wall close to the display area through the combined action of the slow flow retaining wall and the slow flow groove. Meanwhile, the slow flow grooves are arranged between the boundary of the cathode layer and the boundary of the display area, namely, the array layer between the boundary of the cathode layer and the boundary of the display area is thinned, when film layers (such as a hole injection layer, a hole transmission layer and the like) in the display layer are manufactured by adopting an evaporation process, the edge of the mask plate used by a part of the film layers is positioned between the boundary of the cathode layer and the boundary of the display area, and the design of the invention can prevent the edge of the mask plate used by evaporation from scratching a pixel defining layer, thereby ensuring the performance reliability of the display panel.
In an embodiment, fig. 16 is a schematic top view of another alternative embodiment of the display panel according to the embodiment of the present invention, as shown in fig. 16, a peripheral circuit Z is disposed in the first non-display area BA1, and the slow flow groove HC is located between the boundary AAB of the display area AA and the peripheral circuit Z. The peripheral circuit may include a gate driving circuit including a shift register for driving gate lines in the display panel and some circuit traces. When the film layer in the display layer is manufactured by adopting an evaporation process, the edge of the mask plate used by a part of the film layer is positioned between the peripheral circuit and the boundary of the display area.
Fig. 11, 12 and 13 are all illustrated by the display panel including a peripheral circuit Z in the first non-display region. The peripheral circuit can be a gate driving circuit or only a part of circuit traces. Optionally, in the above embodiment, the first non-display area may not be provided with a peripheral circuit, which is beneficial to realizing the narrowing of the first non-display area.
The array layer comprises a buffer layer, a gate insulating layer, an interlayer insulating layer or a planarization layer and the like which extend into the first non-display area. The buffer layer may be fabricated before an active layer fabrication process of the thin film transistor, the gate insulating layer may be fabricated after a gate fabrication process of the thin film transistor, the interlayer insulating layer may be fabricated after a source and drain fabrication process of the thin film transistor, and optionally, a planarization layer may be fabricated on the interlayer insulating layer.
Optionally, the slow flow groove is formed in at least one membrane layer in the array layer. In one embodiment, the planarization layer may be etched to form a slow flow recess. In another embodiment, the planarization layer and the interlayer insulating layer may be etched to form a slow flow groove. In another embodiment, the planarization layer, the interlayer insulating layer, and the gate insulating layer may be etched to form a slow flow groove. In another embodiment, all the insulating film layers above the substrate in the array layer may be etched away to form the slow flow grooves.
In an embodiment, fig. 17 is a schematic cross-sectional view of another alternative implementation of the display panel according to the embodiment of the present disclosure. As shown in fig. 17, the array layer 102 includes a buffer layer 1021 and a plurality of thin film transistors T; in the display area AA, the buffer layer 1021 is located between the thin film transistor T and the substrate 101, the thickness of the buffer layer 1021 in the display area AA is d5, the buffer layer 1021 extends to the first non-display area BA1, and the thickness of the buffer layer 1021 in the region of the slow flow groove HC is d6, wherein d6< d 5. Fig. 17 is a simplified diagram showing only a part of the structure of the display panel. In this embodiment, through set up the unhurried current barricade in the first non-display area adjacent with the breach, the speed of flow that the liquid organic packaging layer material can be slowed down to the barricade of slowly flowing, guarantees that organic packaging layer can end first barricade and be close to display area one side, can guarantee the effectual organic packaging layer of cladding of the inorganic packaging layer among the packaging structure, can guarantee the reliability of encapsulation effect. In addition, the array layer is also provided with a slow flow groove between the slow flow retaining wall and the boundary of the display area, so that the flow speed of the liquid organic packaging layer material can be further slowed down, and the organic packaging layer can be ensured to be stopped at one side of the first retaining wall close to the display area through the combined action of the slow flow retaining wall and the slow flow groove. The thickness of the buffer layer in the film structure of the array layer is usually set to be thicker, and in the embodiment, a part of the buffer layer is etched in the first non-display area to form the slow flow groove, so that the manufacturing process on the buffer layer is not changed, and the process is relatively simple.
In one embodiment, the length of the slow flow groove is less than or equal to the length of the slow flow retaining wall along the extending direction of the edge of the notch. In the display panel provided by the invention, the shape of the notch can be polygonal or semicircular, so that the edge shape of the notch is not fixed, but no matter the edge of the notch is in any shape, when the edge of the notch is locally enlarged, the edge approaches a straight line, and the edge of the notch in an enlarged state is only shown below. Fig. 18 is a partially enlarged schematic view of another alternative implementation of the display panel according to the embodiment of the present invention. As shown in fig. 18, only a partial area of the display panel is shown, the edge of the notch is B, and the length d7 of the slow flow groove HC is smaller than the length d8 of the slow flow retaining wall HQ in the extending direction of the edge B. In the embodiment, one side of the slow flow retaining wall close to the display area is a slow flow groove, and the length of the slow flow groove is less than or equal to that of the slow flow retaining wall, after the organic packaging material overflows the slow flow groove, when the organic packaging material overflows from the edge of the slow flow groove, the organic packaging material can be ensured to be further blocked by the slow flow retaining wall at the position corresponding to the edge of the slow flow groove, the liquid organic packaging material can be prevented from directly spreading to the first retaining wall after overflowing from the edge position of the slow flow groove, the implementation mode ensures that the liquid organic packaging layer material can spread to the first retaining wall after two times of slow flow action, realizes that the boundary of the organic packaging layer is effectively stopped at one side of the first retaining wall close to the display area, and then can guarantee the effectual cladding organic packaging layer of inorganic packaging layer among the packaging structure, can guarantee the reliability of encapsulation effect.
In one embodiment, a plurality of slow flow grooves are arranged in sequence along the extending direction of the edge of the notch. Fig. 19 is a schematic top view of another alternative embodiment of a display panel according to an embodiment of the invention. As shown in fig. 19, the shape of the notch K is merely a rectangle, and the plurality of slow flow grooves HC are arranged in order along the extending direction of the edge B of the notch K. Set up a plurality of slow flow recesses in this embodiment, when the organic encapsulating layer of preparation display panel, a plurality of slow flow recesses play the delay effect to spreading of liquid organic encapsulating layer material simultaneously in the different positions of first non-display area, guarantee as far as possible that liquid organic encapsulating layer material can be in even spreading in first non-display area, avoid spreading in local concentration and surpassing predetermined position (first barricade is close to display area one side), influence encapsulation effect. In addition, in the embodiment, a plurality of slow flow grooves can be uniformly arranged between the slow flow retaining wall and the boundary of the display area, so that the structural uniformity of the first non-display area is ensured, and the stability of mechanical strength is ensured. In addition, reading a slow flow recess and can providing the bending path for the breach position when taking place to buckle, reduce the bending stress that the first non-demonstration of display panel bore, improve resistant bending performance.
In an embodiment, fig. 20 is a schematic top view of another alternative implementation of the display panel according to the embodiment of the present disclosure. As shown in fig. 20, the slow flow retaining wall HQ has at least one first break DK1, the slow flow retaining wall HQ being discontinuous at the first break DK 1; in the direction from the display area AA to the first retaining wall Q1, the interval between two adjacent slow flow grooves HC is staggered with respect to the first fracture DK 1. In this embodiment, the liquid organic encapsulating layer material spreads from the display area to the first non-display area, the liquid organic encapsulating layer material at the position of the slow flow groove can spread toward the first fracture after filling the slow flow groove, and the slow flow retaining wall corresponding to the spacing position between two adjacent slow flow grooves can block the organic encapsulating layer material, so as to prevent the organic encapsulating layer material from spreading over the slow flow groove and then spreading directly via the first fracture due to the corresponding spacing position between two adjacent slow flow grooves and the first fracture, thereby weakening the slow flow effect of the organic encapsulating layer material. The invention ensures that the organic packaging layer is stopped at one side of the first retaining wall close to the display area through the matching of the slow flow groove and the slow flow retaining wall.
In one embodiment, the length of the slow flow groove is greater than or equal to the length of the first fracture along the extending direction of the edge of the notch. Fig. 21 is a partially enlarged schematic view of another alternative implementation of the display panel according to the embodiment of the present invention. As shown in fig. 21, only a partial area of the display panel is shown, the edge of the notch is B, the length of the slow flow groove HC in the extending direction of the edge B is d9, and the length of the first break DK1 is d 10. In this embodiment, it is equivalent to setting the length-size relationship between the slow flow groove and the first fracture corresponding to the display area in the direction pointing to the first non-display area, and it is ensured that in the display panel provided with the first fracture, part of the organic encapsulating layer material fills the slow flow groove and then spreads to the first fracture position, and part of the organic encapsulating layer material not filling the slow flow groove is directly blocked by the slow flow retaining wall, and it is ensured that the organic encapsulating layer material overflowing from the edge of the slow flow groove is also blocked by the slow flow retaining wall, and it is ensured that the slow flow groove and the slow flow retaining wall are mutually matched, and the organic encapsulating layer is effectively stopped at the first retaining wall near one side of the display area.
Fig. 22 is a schematic view of a display device according to an embodiment of the present invention, and fig. 22 illustrates a display panel 100 according to any embodiment of the present invention. The display device provided by the embodiment of the invention can be any electronic product with a display function, including but not limited to the following categories: the mobile terminal comprises a television, a notebook computer, a desktop display, a tablet computer, a digital camera, a mobile phone, an intelligent bracelet, intelligent glasses, a vehicle-mounted display, medical equipment, industrial control equipment, a touch interaction terminal and the like.
As can be seen from the above embodiments, the display panel and the display device provided by the present invention at least achieve the following beneficial effects:
according to the display panel provided by the invention, the first retaining wall, the second retaining wall and the slow flow retaining wall are arranged in the first non-display area adjacent to the notch, when the display panel is used for manufacturing the organic packaging layer in the packaging structure, the slow flow retaining wall can play a role of slow flow blocking on the liquid organic packaging layer material, when the liquid organic packaging layer material delays from the display area to the first non-display area, the slow flow retaining wall can slow down the flow rate of the liquid organic packaging layer material, and the organic packaging layer can be ensured to be stopped at one side of the slow flow retaining wall close to the display area or between the slow flow retaining wall and the first retaining wall, so that the liquid organic packaging layer material can be prevented from being concentrated in the first non-display area and then spreading to pass through the second retaining wall. The edge of the organic packaging layer is guaranteed to be stopped at one side, close to the display area, of the first retaining wall through the arrangement of the slow flow retaining wall, and the edge of the inorganic packaging layer manufactured in the packaging structure is usually stopped between the first retaining wall and the second retaining wall or at one side, far away from the display area, of the second retaining wall.
Although some specific embodiments of the present invention have been described in detail by way of examples, it should be understood by those skilled in the art that the above examples are for illustrative purposes only and are not intended to limit the scope of the present 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 (15)
1. A display panel is characterized by comprising a display area, a non-display area and at least one notch, wherein the non-display area is arranged around the display area, the display area comprises a plurality of data lines extending along a first direction, the edge of the display panel is sunken towards the inside of the display area along a second direction to form the notch, the second direction is crossed with the first direction, the non-display area comprises a first non-display area, and the first non-display area is adjacent to the notch; further comprising:
a substrate base plate;
the array layer is positioned above the substrate base plate;
the display layer is positioned on one side, far away from the substrate base plate, of the array layer and positioned in the display area;
the packaging structure is positioned on one side of the display layer, which is far away from the array layer, and comprises at least one organic packaging layer; wherein the content of the first and second substances,
a first retaining wall, a second retaining wall and a slow flow retaining wall are arranged in the first non-display area, wherein the second retaining wall is positioned on one side, away from the display area, of the first retaining wall, the slow flow retaining wall is positioned on one side, close to the display area, of the first retaining wall, and the organic packaging layer is stopped on one side, close to the display area, of the first retaining wall;
the slow flow retaining wall is provided with at least one first fracture, and the slow flow retaining wall is discontinuous at the first fracture; the arrangement density of the first fracture in the first region of the slow flow retaining wall is greater than that of the first fracture in the second region of the slow flow retaining wall.
2. The display panel according to claim 1,
the slow flow retaining wall is provided with a first surface at one side far away from the substrate base plate, and the distance from the first surface to the substrate base plate is d 1;
the first retaining wall is provided with a second surface far away from one side of the substrate base plate, and the distance between the second surface and the substrate base plate is d 2;
the second baffle wall is provided with a third surface far away from one side of the substrate base plate, and the distance between the third surface and the substrate base plate is d 3; wherein the content of the first and second substances,
d1 is not less than d2, and d1 is not less than d 3.
3. The display panel according to claim 1,
first barricade has at least one second fracture, first barricade is in second fracture department is discontinuous, by the barricade of slowly flowing points to in the direction of first barricade: the second discontinuity does not overlap the first discontinuity.
4. The display panel according to claim 1,
the non-display area further comprises a second non-display area, and the second non-display area is adjacent to the first non-display area and is not adjacent to the notch;
and an extension retaining wall extending along the first direction is arranged in the second non-display area, and the extension retaining wall is connected with the slow flow retaining wall.
5. The display panel according to claim 4,
the length of the extended retaining wall in the first direction is d4, wherein d4 is not less than 10 mu m and not more than 200 mu m.
6. The display panel according to claim 1,
a slow flow groove is further formed in the first non-display area, the slow flow groove is located in the array layer, a notch of the slow flow groove is located on the surface of one side, away from the substrate base plate, of the array layer, and the projection of the slow flow groove on the substrate base plate is a first projection; the first retaining wall is in the projection of substrate base plate is the second projection, the boundary in display area is in the projection of substrate base plate is the third projection, first projection is located the second projection with between the third projection.
7. The display panel according to claim 6,
the display layer comprises a cathode layer, the cathode layer comprises a first boundary located in the first non-display area, the projection of the first boundary on the substrate base plate is a fourth projection, and the first projection is located between the fourth projection and the third projection.
8. The display panel according to claim 6,
and a peripheral circuit is arranged in the first non-display area, and the slow flow groove is positioned between the boundary of the display area and the peripheral circuit.
9. The display panel according to claim 6,
the first non-display area comprises a boundary of a pixel definition layer, and the slow flow groove is located between the boundary of the pixel definition layer and the slow flow retaining wall.
10. The display panel according to claim 6,
the array layer comprises a buffer layer and a plurality of thin film transistors;
in the display region, the buffer layer is located between the thin film transistor and the substrate, and the thickness of the buffer layer in the display region is d5,
the buffer layer extends to the first non-display area, and the thickness of the buffer layer in the region where the slow flow grooves are located is d6, wherein d6< d 5.
11. The display panel according to claim 6,
and in the extending direction of the edge of the notch, the length of the slow flow groove is less than or equal to that of the slow flow retaining wall.
12. The display panel according to claim 6,
and the slow flow grooves are sequentially arranged along the extending direction of the edge of the notch.
13. The display panel according to claim 10,
the slow flow retaining wall is provided with at least one first fracture, and the slow flow retaining wall is discontinuous at the first fracture;
and the display area points to the direction of the first retaining wall, and the interval between two adjacent slow flow grooves and the first fracture are arranged in a staggered mode.
14. The display panel according to claim 13,
and in the extending direction of the edge of the notch, the length of the slow flow groove is greater than or equal to that of the first fracture.
15. A display device characterized by comprising the display panel according to any one of claims 1 to 14.
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