Display panel and display device

Abstract

Embodiments of the present application provide a display panel and a display device. The display panel comprises a through hole, a through hole non-display area and a display area, the through hole non-display area at least partially surrounds the through hole, and the display area at least partially surrounds the through hole non-display area; the substrate comprises a first base layer, a first inorganic layer and a second base layer, the first inorganic layer is located between the first base layer and the second base layer, and the first base layer is located on the side of the first inorganic layer close to the display layer; the substrate has a groove, the groove is located in the through hole non-display area, the groove comprises a first part and a second part which are in communication with each other, the first part penetrates part of the first inorganic layer, and the second part penetrates the first base layer; and the common functional layer in the display layer is disconnected at the groove. The present application can improve the packaging effect at the groove position and reduce the risk of packaging failure.

Description

TECHNICAL FIELD

[0001] The present application relates to the technical field of display, in particular to a display panel and a display device. BACKGROUND

[0002] In a display technology, a through hole is arranged in a display area of a display panel, and a sensing device such as a camera is arranged in the through hole, so that the space occupied by the device can be saved, and thus the width of the frame can be reduced. For an organic self-luminous display panel, after the through hole is made in the display area, the common functional layer exposed on the side wall of the through hole forms a channel for water and oxygen to enter, and the water and oxygen entering the pixel area will cause the pixel to display black spots, affecting the performance reliability of the product. Improving the packaging effect of the through hole area is a technical problem to be solved at present. SUMMARY

[0003] Embodiments of the present application provide a display panel and a display device to solve the technical problem of improving the packaging effect of the through hole area.

[0004] In a first aspect, embodiments of the present application provide a display panel, the display panel comprising a through hole, a through hole non-display area and a display area, the through hole non-display area at least partially surrounding the through hole, and the display area at least partially surrounding the through hole non-display area; the display panel further comprising:

[0005] a substrate and a display layer located on one side of the substrate, the substrate comprising a first base layer, a first inorganic layer and a second base layer, the first inorganic layer being located between the first base layer and the second base layer, and the first base layer being located on the side of the first inorganic layer close to the display layer;

[0006] the substrate has a groove, the groove being located in the through hole non-display area, and the groove comprising a first part and a second part that are in communication with each other, the first part penetrating part of the first inorganic layer, and the second part penetrating the first base layer;

[0007] the display layer comprises a common functional layer, and the common functional layer is disconnected at the groove.

[0008] In a second aspect, based on the same inventive concept, embodiments of the present application also provide a display device comprising the display panel provided by any of the embodiments of the present application.

[0009] The display panel and the display device provided by the embodiment of the present application have the following beneficial effects: a groove is made on the substrate as a partition structure, the common functional layer is partitioned by the groove, the common functional layer is discontinuous in the through-hole non-display area, and the path of water and oxygen entering the display area through the common functional layer is blocked. The groove penetrates at least part of the first inorganic layer, the first partition part formed by the partition of the groove is deposited on the groove bottom, the first partition part is in contact with the first inorganic layer, the inorganic encapsulation layer in the encapsulation layer is in contact with the sidewall of the first partition part, and the inorganic encapsulation layer is also in contact with the first partition part. The first inorganic layer and the inorganic encapsulation layer both belong to inorganic material layers, the inorganic encapsulation layer is in contact with the sidewall of the first partition part, the adhesion of the sidewall of the groove and the encapsulation layer can be enhanced, the water and oxygen blocking capability of the first inorganic layer is better than that of other organic base layers in the substrate, water and oxygen cannot invade from the bottom position of the groove, and the water and oxygen blocking capability at the groove position is improved. In addition, the first inorganic layer, the first partition part and the inorganic encapsulation layer are stacked in sequence at the groove position, forming a stacking structure similar to the inorganic / organic stacking structure in the encapsulation layer, the encapsulation effect at the groove position can be improved, and the risk of encapsulation failure can be reduced. BRIEF DESCRIPTION OF DRAWINGS

[0010] In order to more clearly illustrate the technical solutions in the embodiments of the present application or the prior art, the following will briefly introduce the drawings needed to be used in the embodiments or the prior art description. Obviously, the drawings in the following description are some embodiments of the present application, and other drawings can also be obtained by those skilled in the art without creative labor.

[0011] Figure 1 A display panel schematic diagram provided by the embodiment of the present application;

[0012] Figure 2 A display panel schematic diagram provided by the embodiment of the present application; Figure 1 A cross-sectional schematic diagram at the tangent A-A' position;

[0013] Figure 3 A display panel schematic diagram provided by the embodiment of the present application;

[0014] Figure 4 A display panel schematic diagram provided by the embodiment of the present application;

[0015] Figure 5 A display panel schematic diagram provided by the embodiment of the present application;

[0016] Figure 6 A display panel schematic diagram provided by the embodiment of the present application;

[0017] Figure 7 A display panel schematic diagram provided by the embodiment of the present application;

[0018] Figure 8 Another partial schematic view of a display panel is provided for an embodiment of the present application.

[0019] Figure 9 Another partial schematic view of a display panel is provided for an embodiment of the present application.

[0020] Figure 10 Another partial schematic view of a display panel is provided for an embodiment of the present application.

[0021] Figure 11 Another partial schematic view of a display panel is provided for an embodiment of the present application.

[0022] Figure 12 A schematic view of a display device is provided for an embodiment of the present application. DETAILED DESCRIPTION

[0023] In order to make the objects, technical solutions and advantages of embodiments of the present application clearer, the following will be combined with the accompanying drawings for the embodiments of the present application to make a clear and complete description of the technical solutions in the embodiments of the present application. Obviously, the described embodiments are some but not all of the embodiments of the present application. Based on the embodiments in the present application, all other embodiments obtained by those of ordinary skill in the art without creative work fall within the protection scope of the present application.

[0024] The terms used in the embodiments of the present application are merely for the purpose of describing particular embodiments and are not intended to limit the present application. The singular forms "a", "said" and "the" used in the embodiments of the present application and the appended claims are also intended to include the plural forms, unless the context clearly indicates otherwise.

[0025] In the prior art, in order to block the invasion of water and oxygen into the display area via the common functional layer, a partition structure is arranged in the via non-display area around the via, so as to block the common functional layer by using the partition structure. One design scheme is to make a groove on the organic layer of the substrate as the partition structure, and the organic layer has poor water and oxygen isolation capability. When a crack is generated in the via non-display area, a water and oxygen invasion path is formed at the groove position, resulting in a high risk of packaging failure.

[0026] In order to solve the problems in the prior art, the embodiments of the present application provide a display panel, a groove is made on a substrate as a partition structure, and the groove penetrates the inorganic layer and the groove bottom is exposed to the inorganic layer. When the groove is used to block the common functional layer, the material of the common functional layer is in contact with the inorganic layer in the groove bottom, and the stacked structure of the inorganic layer and the common functional layer is similar to the structure of the stacked inorganic packaging layer and the organic packaging layer in the packaging layer, so as to improve the packaging effect and reduce the risk of packaging failure.

[0027] Figure 1 A display panel schematic diagram provided by an embodiment of the present application, Figure 2 A Figure 1 A cross-sectional schematic diagram at the tangent position A-A'. As shown in the figure, Figure 1 The display panel includes a through hole K, a through hole non-display area NAK, and a display area AA, the through hole non-display area NAK surrounds the through hole K, the display area AA surrounds the through hole non-display area NAK, and the through hole K penetrates at least part of the film layer of the display panel. In some embodiments, the through hole non-display area NAK partially surrounds the through hole K, and the display area AA partially surrounds the through hole non-display area NAK, such as a water drop screen, which is not shown in the figure. In addition, the shape of the through hole K is not limited in the embodiment of the present application, Figure 1 In the embodiment, only the shape of the through hole K is circular. Figure 1 In the embodiment, the position of the through hole K on the display panel is also only schematically represented.

[0028] As shown in the figure, Figure 2 The display panel includes a substrate 10 and a display layer 20 located on one side of the substrate 10, the substrate 10 includes a first base layer 11, a first inorganic layer 12, and a second base layer 13, the first inorganic layer 12 is located between the first base layer 11 and the second base layer 13, and the first base layer 11 is located on the side of the first inorganic layer 12 close to the display layer 20.

[0029] The materials of the first base layer 11 and the second base layer 12 include organic materials, for example, at least one of polyimide, polyethylene naphthalate, polyethylene terephthalate glycol, and polycarbonate. The first base layer 11 and the second base layer 12 have a certain flexibility, so that the overall substrate 10 is a flexible substrate, which is conducive to realizing the flexibility of the overall display panel. However, the water and oxygen blocking ability of the first base layer 11 and the second base layer 12 is relatively poor, and the arrangement of the first inorganic layer 12 can improve the overall water and oxygen blocking ability of the substrate 10. The material of the first inorganic layer 12 can include at least one of silicon oxide, silicon nitride, and amorphous silicon.

[0030] The display layer 20 includes a common functional layer 21, and the common functional layer 21 includes at least one of a hole transport layer, a hole injection layer, an electron transport layer, an electron injection layer, a light emitting material layer, and a common electrode layer. During the manufacturing of the display panel, the common functional layer 21 is manufactured by using an open mask. In the display panel with the through hole K, the common functional layer 21 extends from the display area AA to the through hole non-display area NAK. Figure 2 In the embodiment, the light emitting material layer 22, the first electrode 23, and the second electrode 24 are schematically shown, the first electrode 23 is a patterned structure, the second electrode 24 is a common electrode, and the stacked first electrode 23, light emitting material layer 22, and second electrode 24 constitute a light emitting device. In an embodiment, the first electrode 23 is an anode, and the second electrode 24 is a cathode.

[0031] The display panel further comprises an array layer 30 and an encapsulation layer 40, the array layer 30 is located between the display layer 20 and the substrate 10, and the array layer 30 is provided with pixel circuits for driving the light emitting devices. The encapsulation layer 40 is used to isolate water and oxygen to protect the light emitting devices in the display layer 20. The encapsulation layer 40 comprises at least one organic encapsulation layer 41 and at least one inorganic encapsulation layer 42, Figure 2 In some embodiments, the encapsulation layer 40 only comprises a three-layer structure, and one organic encapsulation layer 41 is arranged between the two inorganic encapsulation layers 42.

[0032] An encapsulation barrier 43 is further arranged in the through-hole non-display area NAK, and the encapsulation barrier 43 is used to define the encapsulation boundary of the encapsulation layer 40. Figure 2 In some embodiments, only one encapsulation barrier 43 is shown. In some embodiments, two encapsulation barriers 43 with different heights are arranged in the through-hole non-display area NAK, which is not shown in the drawings.

[0033] The substrate 10 has a groove C, the groove C is located in the through-hole non-display area NAK, and the groove C comprises a first part C1 and a second part C2 which are in communication with each other, the first part C1 penetrates the first inorganic layer 12, and the second part C2 penetrates the first base layer 11. That is, the groove bottom of the groove C exposes the first inorganic layer 12. Among them, the common functional layer 21 is disconnected at the groove C.

[0034] As Figure 2 shown, the common functional layer 21 comprises a first cut-off part 21a, which is the part cut off by the groove C. The first cut-off part 21a is located in the groove C and is in contact with the first inorganic layer 12, and the inorganic encapsulation layer 42 in the groove C is in contact with the first cut-off part 21a.

[0035] The display panel provided by the embodiment of the present application has a groove C made on the substrate 10 as a partition structure, and the common functional layer 21 is partitioned by the groove C, so that the common functional layer 21 is discontinuous in the through-hole non-display area NAK, thereby blocking the path of water and oxygen entering the display area AA through the common functional layer 21. The groove C penetrates at least part of the first inorganic layer 12, and the common functional layer 21 partitioned by the groove C (i.e., the first partition part 21a) is deposited on the groove bottom of the groove C, the first partition part 21a is in contact with the first inorganic layer 12, and the inorganic encapsulation layer 42 in the encapsulation layer 40 is in contact with the sidewall of the first part C1 and also in contact with the first partition part 21a. The first inorganic layer 12 and the inorganic encapsulation layer 42 both belong to inorganic material layers, so that the inorganic encapsulation layer 42 is in contact with the sidewall of the first part C1, which can enhance the adhesion of the sidewall of the groove C and the encapsulation layer 40, and the water and oxygen blocking capability of the first inorganic layer 12 is better than that of other organic base layers in the substrate 10, so that water and oxygen cannot enter from the bottom position of the groove C, thereby improving the water and oxygen blocking capability at the position of the groove C. In addition, the first inorganic layer 12, the first partition part 21a and the inorganic encapsulation layer 42 are stacked in sequence at the position of the groove C, which forms a structure similar to the inorganic / organic stacking structure in the encapsulation layer 40, thereby improving the encapsulation effect at the position of the groove C and reducing the risk of encapsulation failure.

[0036] In the embodiment of the present application, the first part C1 has a certain height in the direction perpendicular to the plane where the substrate 10 is located, and the penetration depth of the first part C1 in the first inorganic layer 12 is not specifically limited, as long as the film layer exposed by the groove C bottom is the first inorganic layer 12.

[0037] In some embodiments, Figure 3 Another partial schematic view of a display panel provided by the embodiment of the present application is shown in FIG. 6, which is similar to the display panel shown in FIG. 5, and the difference between them is that the display panel shown in FIG. 6 has a groove C1 in the first inorganic layer 12, and the groove C1 is in contact with the first partition part 21a and the inorganic encapsulation layer 42. Figure 3As shown, in the first direction x, the length of the side of the first section C1 away from the second section C2 is d1, and the length of the side of the second section C2 close to the first section C1 is d2, d1>d2, and the first direction x is parallel to the plane in which the substrate 10 lies. In terms of the first section C1 of the first inorganic layer 12 penetrating the part as a sub-slot of the groove C, the side of the second section C2 close to the first section C1 is the slot opening of the sub-slot, and the area size of the slot bottom of the sub-slot in which the first section C1 lies is greater than the area size of the slot opening. In this way, at the position of the groove C, the sidewall of the first base layer 11 forming the second section C2 extends out of the sidewall of the first inorganic layer 12 forming the first section C1. In other words, the sidewall of the first section C1 is recessed inwardly of the first inorganic layer 12 relative to the second section C2, so that an inverse step is formed at the position where the first inorganic layer 12 and the first base layer 11 are in contact within the groove C (in the direction looking from the common functional layer 21 to the second base layer 13). In this way, the common functional layer 21 can be disconnected at the position of the groove C.

[0038] In some embodiments, Figure 4 Another partial schematic view of a display panel according to an embodiment of the present application is provided as follows. Figure 4 As shown, the second section C2 includes a first sub-section 51 and a second sub-section 52, and the second sub-section 52 is located on the side of the first sub-section 51 away from the first section C1; in the direction e perpendicular to the plane in which the substrate 10 lies, the sidewall of the first section C1 and the sidewall of the second section C2 are misaligned. That is, the sidewall of the first section C1 and the sidewall of the second section C2 are not aligned in the direction e. Figure 4 A center line Z of the groove C is shown in the middle, the extension direction of the center line Z is parallel to the direction e perpendicular to the plane in which the substrate 10 lies, and the center line Z can be considered as the center of the groove C. In the first direction x, the minimum distance of the sidewall of the second sub-section 52 from the center of the groove C is greater than the maximum distance of the sidewall of the first sub-section 51 from the center of the groove C. In this embodiment, the first sub-section 51 and the second sub-section 52 are both formed by etching the first base layer 11, and the arrangement of the first sub-section 51 and the second sub-section 52 in the groove C causes the sidewall of the first base layer 11 to form a stepped shape, and this arrangement can increase the total length of the sidewall of the first base layer 11 in the groove C, and the length of the encapsulation layer 40 covering the sidewall of the first base layer 11 is also increased, thereby increasing the effective encapsulation path and further improving the encapsulation capability.

[0039] In addition, in the embodiment of the present invention, by changing the morphology of the side wall of the first base layer 11 in the groove C to extend the encapsulation path of the encapsulation layer 40, the depth of the groove C does not need to be increased. Compared with the solution of increasing the groove depth, the embodiment of the present invention is not limited by the thickness of the substrate 10, and can extend the encapsulation path of the encapsulation layer 40 in a limited space, which has more advantages in design. Moreover, the side wall of the first base layer 11 in the groove C is formed into a stepped shape, and the morphology is relatively gentle. When the inorganic encapsulation layer 42 in the encapsulation layer 40 is deposited at this position, it can transition smoothly and is not likely to break, thereby further improving the encapsulation reliability.

[0040] In some embodiments, as Figure 4 shown, in the direction e perpendicular to the plane of the substrate 10, the height of the first sub - part 51 is h1, and the height of the second sub - part is h2; │h1 - h2│ / (h1 + h2) ≤ 1 / 3. h1 + h2 is the total thickness of the first base layer 11. In this embodiment, the difference in the height between the first sub - part 51 and the second sub - part 52 is set to be small, which can make the side wall of the first base layer 11 in the groove C form an obvious stepped morphology, so as to ensure an increase in the total side wall length of the first base layer 11 in the groove C. At the same time, when the inorganic encapsulation layer 42 is deposited on the side wall of the first base layer 11, it can transition smoothly and is not likely to break. [[ID=⑥]] [[ID=⑦]]

[0041] [[ID=⑧]]In some embodiments, [[ID=⑨]] Figure 5 [[ID=⑩]]Another partial schematic diagram of a display panel provided by an embodiment of the present invention, as [[ID=⑪]] Figure 5 [[ID=⑫]]shown, in the first direction x, the length of the second sub - part 52 on the side away from the first sub - part 51 is d3, and the length of the second sub - part 52 on the side close to the first sub - part 51 is d4, d3 < d4, and the first direction x is parallel to the plane of the substrate 10. That is to say, the area size of the second sub - part 52 on the side away from the first sub - part 51 is smaller than the area size of the second sub - part 52 on the side close to the first sub - part 51. Such a setting not only makes the side walls of the second sub - part 52 and the first sub - part 51 form a stepped morphology, but also can use the side walls and step surfaces in the stepped shape to partition the common functional layer 21, such as [[ID=⑬]] Figure 5 [[ID=⑭]]the position where the second partition part 21b is located in. This embodiment can partition the common functional layer 21 multiple times at the position of the groove C, improving the partitioning performance of the common functional layer 21. [[ID=⑮]] [[ID=⑯]]

[0042] [[ID=⑰]] Figure 5 [[ID=⑱]]In the embodiment, the shape of the side wall of the second sub - part 52 is only shown schematically and is not a limitation to the present invention. [[ID=⑲]] [[ID=⑳]]

[0043] [[ID=㉑]]In some embodiments, [[ID=㉒]] Figure 6 [[ID=㉓]]Another partial schematic diagram of a display panel provided by an embodiment of the present invention, as [[ID=㉔]] Figure 6As shown, the substrate 10 also includes a second inorganic layer 14, which is located on the side of the first base layer 11 closer to the display layer 20, that is, on the side of the first base layer 11 away from the first inorganic layer 12. The groove C also includes a third portion C3 that communicates with the first portion C1 and the second portion C2, and the third portion C3 penetrates the second inorganic layer 14. In the direction e perpendicular to the plane of the substrate 10, the sidewalls of the third portion and the second portion C2 are misaligned; that is, the sidewalls of the third portion and the second portion C2 are not aligned in the direction e. Figure 4 The diagram illustrates the centerline Z of the groove C. The extension direction of the centerline Z is parallel to the direction e perpendicular to the plane containing the substrate 10, and the centerline Z can be considered the center of the groove C. In the first direction x, the minimum distance from the sidewall of the third portion to the center of the groove C is greater than the maximum distance from the sidewall of the second portion C2 to the center of the groove C. This arrangement causes the sidewalls of the second inorganic layer 14 and the first substrate layer 11 within the groove C to connect and form a stepped morphology, increasing the total length of the sidewalls within the groove C. The length of the encapsulation layer 40 covering the sidewalls of the groove C is also increased, thereby lengthening the effective encapsulation path and further improving the encapsulation capability. In addition, in this embodiment, the second inorganic layer 14 can act as a buffer layer to provide a certain buffering effect. The second inorganic layer 14 can also play a planarization role, providing a relatively flat surface for the array layer fabricated on the substrate 10.

[0044] In some implementations, such as Figure 2 As shown, at least one groove C is located on the side of the encapsulation barrier 43 away from the display area AA. The encapsulation barrier 43 is used to define the boundary of the encapsulation layer 40. By placing the groove C on the outside of the encapsulation layer 40, the common functional layer 21 is first isolated from the outside to prevent water and oxygen from penetrating into the inside of the encapsulation layer 40. The number of grooves C located on the side of the encapsulation barrier 43 away from the display area AA can be set according to design requirements.

[0045] In some implementations... Figure 7 A partial schematic diagram of another display panel provided in an embodiment of the present invention, as shown below. Figure 7 As shown, at least one groove C is located on the side of the encapsulation barrier 43 near the display area AA. This embodiment is equivalent to setting the groove C within the encapsulation layer 40, thereby isolating the common functional layer 21 at multiple different locations and further ensuring that the path of water and oxygen intruding into the display area AA via the common functional layer 21 is effectively blocked. The number of grooves C located on the side of the encapsulation barrier 43 near the display area AA can be set according to design requirements.

[0046] In the above embodiments, the sidewalls of each portion in the schematic groove C are basically planar. In some embodiments, the sidewalls of each portion in the groove C may also be curved. In practice, the materials of the base layer and the inorganic layer are different, and the shape of the sidewalls formed after etching may vary slightly.

[0047] In some implementations... Figure 8 A partial schematic diagram of another display panel provided in an embodiment of the present invention, as shown below. Figure 8 As shown, in the direction from the common functional layer 21 to the second base layer 13, the length of the first sub-part 51 gradually increases in the first direction x, and the length of the second sub-part 52 also gradually increases in the first direction x. This arrangement results in the sidewall of the second sub-part C2 having a stepped morphology, making the sidewall of the second sub-part C2 more gentle. When the inorganic encapsulation layer 42 in the encapsulation layer 40 is deposited at this location, it can transition smoothly, making it less prone to breakage and improving encapsulation reliability.

[0048] In some implementations... Figure 9 A partial schematic diagram of another display panel provided in an embodiment of the present invention, as shown below. Figure 9 As shown, the sidewall of the first portion C1 has a chamfered shape at the end near the second portion C2. This design causes the sidewall of the first portion C1 to be recessed into the first inorganic layer 12 relative to the sidewall of the second portion C2, forming a reverse step at the contact point between the first inorganic layer 12 and the first base layer 11 within the groove C. This design allows the common functional layer 21 to be disconnected at the groove C.

[0049] In some implementations... Figure 10 This is a partial schematic diagram of another display panel provided in an embodiment of the present invention. Figure 10 A partial top view is shown, such as Figure 10 As shown, the groove C surrounds the through hole K. The groove C can isolate the common functional layer 21 in all directions surrounding the through hole K, effectively preventing water and oxygen from entering the display area AA through the common functional layer 21.

[0050] Figure 10 Only one groove C is shown in the diagram. The number of grooves C in the non-display area (NAK) of the through-hole can be set according to specific requirements. The shape of the groove C can be set according to the shape of the through-hole K.

[0051] In some embodiments, the groove C at least partially surrounds the through hole K. Figure 11 A partial schematic diagram of another display panel provided in an embodiment of the present invention, as shown below. Figure 11 As shown, two mutually spaced grooves C are provided along the periphery of the through hole K. In the top view, the two mutually spaced grooves form a non-closed shape.

[0052] Optionally, three or more grooves C can be arranged along the circumferential direction of the hole K.

[0053] Based on the same inventive concept, the embodiments of the present application also provide a display device, Figure 12 The display device provided by the embodiments of the present application is shown in the schematic diagram as Figure 12 As shown in the schematic diagram, the display device comprises the display panel 100 provided by any of the embodiments of the present application. The structure of the display panel 100 has been described in the above embodiments, and thus will not be repeated here. The display device can be, for example, a mobile phone, a computer, a television, a vehicle-mounted display device, a wearable device, or the like.

[0054] The above merely provides the preferred embodiments of the present application, and is not intended to limit the present application. Any modification, equivalent replacement, improvement, and the like within the spirit and principle of the present application shall be included in the protection scope of the present application.

[0055] Finally, it should be noted that: the above embodiments are only used to illustrate the technical solutions of the present application, and not to limit them; although the present application has been described in detail with reference to the above embodiments, those skilled in the art should understand that: it can still modify the technical solutions recorded in the above embodiments, or make equivalent replacement for part or all of the technical features; and these modifications or replacements do not make the essence of the corresponding technical solutions deviate from the scope of the technical solutions of the embodiments of the present application.

Claims

1. A display panel, characterized by, The display panel comprises a through hole, a through hole non-display area and a display area, the through hole non-display area at least partially surrounds the through hole, and the display area at least partially surrounds the through hole non-display area; the display panel further comprises: a substrate and a display layer located on one side of the substrate, the substrate comprising a first base layer, a first inorganic layer and a second base layer, the first inorganic layer being located between the first base layer and the second base layer, and the first base layer being located on the side of the first inorganic layer close to the display layer; the substrate has a groove, the groove being located in the through hole non-display area, and the groove comprising a first part and a second part in communication with each other, the first part penetrating part of the first inorganic layer, and the second part penetrating the first base layer; the display layer comprises a common functional layer, and the common functional layer is disconnected at the groove; the second part comprises a first subpart and a second subpart, and the second subpart is located on the side of the first subpart away from the first part; in a direction perpendicular to the plane in which the substrate is located, the sidewall of the first subpart and the sidewall of the second subpart are misaligned, and the minimum distance from the sidewall of the second subpart to the center of the groove is greater than the maximum distance from the sidewall of the first subpart to the center of the groove.

2. The display panel of claim 1, wherein in a first direction parallel to the plane in which the substrate is located, the length of the side of the first part away from the second part is d1, and the length of the side of the second part close to the first part is d2, d1>d2.

3. The display panel of claim 1, wherein in a direction perpendicular to the plane in which the substrate is located, the height of the first subpart is h1, and the height of the second subpart is h2; |h1-h2| / (h1+h2)≤1 / 3.

4. The display panel of claim 1, wherein in a first direction parallel to the plane in which the substrate is located, the length of the side of the second subpart away from the first subpart is d3, and the length of the side of the second subpart close to the first subpart is d4, d3 5. The display panel of claim 1, wherein the substrate further comprises a second inorganic layer, and the second inorganic layer is located on the side of the first base layer close to the display layer; the groove further comprises a third part in communication with the first part and the second part, and the third part penetrates the second inorganic layer; in a direction perpendicular to the plane in which the substrate is located, the sidewall of the third part and the sidewall of the second part are misaligned, and the minimum distance from the sidewall of the third part to the center of the groove is greater than the maximum distance from the sidewall of the second part to the center of the groove.

6. The display panel of claim 1, wherein the common functional layer comprises a first partition part, and the first partition part is located in the groove and in contact with the first inorganic layer. The display panel further comprises an encapsulation layer located on a side of the display layer away from the substrate, the encapsulation layer comprising an inorganic encapsulation layer in contact with the first partition. 7.The display panel of claim 1, wherein, The through-hole non-display region comprises an encapsulation barrier wall. At least one of the grooves is located on a side of the encapsulation barrier wall away from the display region, and / or at least one of the grooves is located on a side of the encapsulation barrier wall close to the display region. 8.The display panel of claim 1, wherein, The groove at least partially surrounds the through-hole. 9.The display panel of claim 1, wherein, The material of the first base layer and the second base layer comprises an organic material.

10. A display device, characterized by comprising: A display panel comprising any one of claims 1 to 9.

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