Display panel and display device

Abstract

The present invention provides a display panel and a display device, which relate to the field of display technology. The display panel can effectively reduce the step difference between a portion of the encapsulation layer corresponding to a through hole and a portion of the encapsulation layer corresponding to a portion of the first flat layer that does not overlap with the first flat portion. The display panel has a plurality of through holes, and the through holes at least penetrate the first flat layer; the orthographic projection of the first flat portion on the substrate is located on the side of the through hole close to the display area, and the boundary of the first flat portion away from the display area does not overlap with the boundary of the through hole close to the display area; the distance from the portion of the encapsulation layer corresponding to the portion of the first flat layer that does not overlap with the first flat portion to the substrate is a first distance, and the distance from the portion of the encapsulation layer corresponding to the through hole to the substrate is a second distance, and the difference between the first distance and the second distance is within a preset range.

Description

Technical Field

[0001] The present invention relates to the field of display technology, and in particular to a display panel and a display device. Background Art

[0002] In current OLED (Organic Light-Emitting Diode) display panel products, slots are usually designed on the PLN (Planarization Layer) in the screen border area to release the gas generated by the PLN layer under high temperature and high humidity conditions. However, if the OLED display panel needs to integrate other functions, such as touch function, the touch line must cross the PLN Slot, which makes it easy for the touch line to remain in the PLN Slot, causing the touch line to be broken, thereby affecting the touch performance. Summary of the invention

[0003] Embodiments of the present invention provide a display panel and a display device, which can effectively reduce the step difference between a portion of the encapsulation layer corresponding to the through hole and a portion of the encapsulation layer corresponding to a portion of the first flat layer that does not overlap with the first flat portion, thereby effectively improving the performance of the display panel.

[0004] To achieve the above object, the embodiments of the present invention adopt the following technical solutions:

[0005] In one aspect, a display panel and a display device are provided, wherein the display panel comprises: a display area, a first circuit area and a second circuit area, wherein the first circuit area and the second circuit area are connected and arranged around the display area;

[0006] The display panel further includes a substrate and a first flat layer, a second flat layer and an encapsulation layer sequentially stacked on the substrate, the second flat layer at least includes a first flat portion, and the first flat layer, the first flat portion and the encapsulation layer are at least arranged in the first circuit area;

[0007] The display panel has a plurality of through holes, wherein the through holes at least penetrate the first flat layer; the orthographic projection of the first flat portion on the substrate is located on a side of the through hole close to the display area, and a boundary of the first flat portion away from the display area does not overlap with a boundary of the through hole close to the display area;

[0008] A distance from a portion of the encapsulation layer corresponding to a portion of the first flat layer that does not overlap with the first flat portion to the substrate is a first distance, and a distance from a portion of the encapsulation layer corresponding to the through hole to the substrate is a second distance, and a difference between the first distance and the second distance is within a preset range.

[0009] Optionally, the preset range includes 0.3-1.2 μm.

[0010] Optionally, the display panel further includes a touch control unit arranged on a side of the encapsulation layer away from the second planar layer.

[0011] Optionally, the display panel further comprises a driving circuit layer and an insulating layer arranged between the substrate and the first flat layer, the driving circuit layer being located on a side of the insulating layer away from the substrate; the driving circuit layer comprises a gate driving circuit and a light-emitting driving circuit which are not connected, and the gate driving circuit, the light-emitting driving circuit and the insulating layer are arranged at least in the first circuit area;

[0012] The through hole is configured to also penetrate a portion of the display panel between the gate driving circuit and the light emitting driving circuit to expose the insulating layer.

[0013] Optionally, the encapsulation layer includes a first inorganic encapsulation layer, an organic encapsulation layer and a second inorganic encapsulation layer.

[0014] Optionally, a plurality of the through holes are arranged in the first circuit area and distributed in a ring shape around the display area.

[0015] Optionally, the distances between two adjacent through holes arranged on the same ring are the same.

[0016] Optionally, the through hole has a shape of any one of a cylinder, a cube or a frustum.

[0017] Optionally, when the through hole is in the shape of a cylinder, the diameter of the cylinder ranges from 8 to 10 μm.

[0018] On the other hand, a display device is provided, comprising the above-mentioned display panel.

[0019] An embodiment of the present invention provides a display panel, which includes a display area, a first circuit area and a second circuit area, wherein the first circuit area and the second circuit area are connected and arranged around the display area; the display panel also includes a substrate and a first flat layer, a second flat layer and an encapsulation layer stacked on the substrate in sequence, wherein the second flat layer includes at least a first flat portion, and the first flat layer, the first flat portion and the encapsulation layer are arranged at least in the first circuit area; the display panel has a plurality of through holes, wherein the through holes at least penetrate the first flat layer; the orthographic projection of the first flat portion on the substrate is located on a side of the through hole close to the display area, and the boundary of the first flat portion away from the display area does not overlap with the boundary of the through hole close to the display area; the distance from the portion of the encapsulation layer corresponding to the non-overlapping portion of the first flat layer to the substrate is a first distance, and the distance from the portion of the encapsulation layer corresponding to the through hole to the substrate is a second distance, and the difference between the first distance and the second distance is within a preset range. Thus, there is almost no step difference between the portion of the encapsulation layer corresponding to the through hole and the portion of the encapsulation layer corresponding to the non-overlapping portion of the first flat layer. In this way, if it is necessary to subsequently graphically form other functional film layers or other functional film layer routings on the packaging layer, the functional film layer or the functional film layer routings in the through hole can be effectively removed by exposure, and electrical connection between the functional film layer or the functional film layer routings and the functional film layer or the functional film layer routings in the through hole can be avoided as much as possible, thereby improving the performance of the functional film layer and then improving the performance of the display panel.

[0020] The above description is only an overview of the technical solution of the present application. In order to more clearly understand the technical means of the present application, it can be implemented in accordance with the contents of the specification. In order to make the above and other purposes, features and advantages of the present application more obvious and easy to understand, the specific implementation methods of the present application are listed below. BRIEF DESCRIPTION OF THE DRAWINGS

[0021] In order to more clearly illustrate the embodiments of the present invention or the technical solutions in the prior art, the drawings required for use in the embodiments or the description of the prior art will be briefly introduced below. Obviously, the drawings described below are only some embodiments of the present invention. For ordinary technicians in this field, other drawings can be obtained based on these drawings without paying creative work.

[0022] Figure 1 A cross-sectional view of a display panel in a related art provided by an embodiment of the present invention;

[0023] Figure 2 for Figure 1 SEM images of some membrane layers in the structure;

[0024] Figure 3 A schematic diagram of the structure of a display panel provided by an embodiment of the present invention;

[0025] Figure 4 for Figure 3 Cross-sectional view of the structure along the EE direction;

[0026] Figure 5 A schematic diagram of the structure of another display panel provided by an embodiment of the present invention;

[0027] Figure 6 A schematic diagram of a touch electrode structure provided by an embodiment of the present invention;

[0028] Figure 7 A schematic diagram of the structure of another display panel provided by an embodiment of the present invention;

[0029] Figure 8 A schematic diagram of a through hole structure provided by an embodiment of the present invention;

[0030] Fig. 9 A schematic diagram of another through hole structure provided by an embodiment of the present invention;

[0031] Fig.10 A schematic diagram of another through hole structure provided by an embodiment of the present invention;

[0032] Fig.11 A schematic diagram of another through-hole structure provided in an embodiment of the present invention. DETAILED DESCRIPTION

[0033] The following will be combined with the drawings in the embodiments of the present invention to clearly and completely describe the technical solutions in the embodiments of the present invention. Obviously, the described embodiments are only part of the embodiments of the present invention, not all of the embodiments. Based on the embodiments of the present invention, all other embodiments obtained by ordinary technicians in this field without creative work are within the scope of protection of the present invention.

[0034] In the embodiments of the present invention, words such as "first" and "second" are used to distinguish between identical or similar items with substantially the same functions and effects. This is only for the purpose of clearly describing the technical solutions of the embodiments of the present invention, and shall not be understood as indicating or implying relative importance or implicitly indicating the number of the indicated technical features.

[0035] In the embodiments of the present invention, "plurality" means two or more.

[0036] In the embodiments of the present invention, the orientation or positional relationship indicated by the term "on" or the like is based on the orientation or positional relationship shown in the accompanying drawings, and is only for the convenience of describing the present invention and simplifying the description, rather than indicating or implying that the device or element referred to must have a specific orientation, be constructed and operated in a specific orientation, and therefore cannot be understood as a limitation on the present invention.

[0037] At present, display panels often use organic materials to make PLN (Planarization Layer), which causes the PLN layer to generate gas under high temperature and high humidity conditions. The gas needs to be released to avoid deformation of the PLN layer. Therefore, reference Figure 1 As shown, the related art usually designs an opening 82 (such as Figure 1 (shown in the dotted box) to release the gas generated by the PLN1 layer 81.

[0038] However, if Figure 2 As shown, Figure 2 for Figure 1 SEM (Scanning Electron Microscope) image of the middle film layer. Figure 1 and Figure 2 As shown, when the PLN2 layer 83 is patterned on the PLN1 layer 81, due to the existence of the above-mentioned opening 82, the side of the PLN2 layer 83 close to the opening 82 is at a certain distance from the side of the PLN1 layer 81 close to the opening 82, so that the step difference of the PLN2 layer 83 at the opening 82 is much larger than the distance between the PLN2 layer 83 and the PLN1 layer 81. In this way, when a subsequent film layer is fabricated on the PLN2 layer 83, for example, when a CVD (Chemical Vapor Deposition) layer 84 is fabricated on the PLN2 layer (the CVD layer includes a CVD1 layer and a CVD2 layer), the difference between the distance from the portion of the CVD layer 84 corresponding to the opening 82 to the substrate 1 and the distance from the portion of the CVD layer 84 corresponding to the non-overlapping portion of the PLN1 layer 81 and the PLN2 layer 83 to the substrate 1 is large, that is, the step difference between the portion of the CVD layer 84 corresponding to the opening 82 and the portion of the CVD layer 84 corresponding to the non-overlapping portion of the PLN1 layer 81 and the PLN2 layer 83 is large, which can be explained by Figure 2 As a result, if other functional film layers are continuously produced on the CVD layer so that the display panel has certain properties, the functional film layers are easily deposited in the openings, and there is a risk that it is difficult to remove the functional film layers in the openings by exposure when the functional layers are patterned, resulting in failure of the functional film layers and affecting the performance of the display panel.

[0039] It should be noted that the reference Figure 1As shown, the display panel includes a frame area connected to the display area AA, and the frame area includes an ILD (Inter Layer Dielectric) layer 85, a first metal wiring layer 86, a PLN1 layer 81, a second metal wiring layer 87, a PLN2 layer 83, an anode 88, an interlayer dielectric layer 89, a light-emitting layer 90 and a cathode 91 stacked on a substrate 1. The frame area is far away from the edge of the display area and also has a first dam portion 92 (Dam1), a second dam portion 93 (Dam2), a crack dam portion 94 (Crack Dam) and a crack detection line 95. The above structures and wiring can be obtained according to relevant technologies and will not be described in detail here.

[0040] Based on this, an embodiment of the present invention provides a display panel, referring to Figure 3 As shown, the display panel includes: a display area AA, a first circuit area B1 and a second circuit area B2. The first circuit area B1 and the second circuit area B2 are connected and arranged around the display area AA.

[0041] Figure 3 The partial cross-sectional view of the display panel along the EE direction is shown in FIG. Figure 4 Reference Figure 4 As shown, the display panel further includes a substrate 1 and a first flat layer 2, a second flat layer and an encapsulation layer 4 sequentially stacked on the substrate 1, the second flat layer at least includes a first flat portion 31, and the first flat layer 2, the first flat portion 31 and the encapsulation layer 4 are at least arranged in the first circuit area B1. The display panel has a plurality of through holes h, and the through holes h at least penetrate the first flat layer 2; the orthographic projection E1 of the first flat portion 2 on the substrate 1 is located on a side of the through hole h close to the display area, and the boundary L1 of the first flat portion 31 away from the display area AA does not overlap with the boundary L2 of the through hole h close to the display area AA.

[0042] refer to Figure 4 As shown, the distance from the portion of the encapsulation layer 4 corresponding to the non-overlapping portion of the first flat layer 2 and the first flat portion 31 to the substrate 1 is a first distance d1, and the distance from the portion of the encapsulation layer 4 corresponding to the through hole h to the substrate 1 is a second distance d2, and the difference between the first distance d1 and the second distance d2 is within a preset range.

[0043] The display area (Active Area, AA) of the display panel is the area used for display. In the display area, the light-emitting area (also known as the pixel opening area) is the area where the light-emitting unit is arranged, and the light-emitting unit may include an anode, an organic light-emitting functional layer and a cathode.

[0044] There is no specific limitation on the type, structure, etc. of the above-mentioned first circuit area. For example, the first circuit area may include a chip area and a wiring area. In this case, the chip area and the wiring area may be integrated together, and of course the chip area and the wiring area may also be independently set. Alternatively, the first circuit area may only include a wiring area. In this case, the first circuit area may be a whole, and of course it may also be composed of multiple independent parts. Figure 3 The first circuit area B1 is taken as an example of a wiring area as a whole. The wiring area can be used to set signal lines such as a power signal line ELVSS.

[0045] There is no specific limitation on the type and structure of the second circuit area. For example, the second circuit area may include a Fanout area and a Bonding area. In this case, the Fanout area and the Bonding area cannot be bent. Of course, the Fanout area and the Bonding area can also be bent; or, the second circuit area may only include the Bonding area. Figure 3 The second circuit area is taken as a bonding area for example.

[0046] The first circuit area and the second circuit area are connected and arranged around the display area. The relative positions of the first circuit area and the second circuit area are not specifically limited here. For example, when the shape of the display panel is Figure 1 The rectangle shown is referenced Figure 3 As shown, the first circuit area B1 is disposed on the left side, the upper side and the right side of the display area AA, and the second circuit area B2 is disposed on the lower side of the display area AA.

[0047] The second flat layer at least including the first flat portion means that the second flat layer may only include the first flat portion. Of course, the first flat portion may also include other flat portions except the first flat portion. Figure 4 Taking the second flat layer including the first flat portion 31 and the second flat portion 32 as an example, the first flat portion 31 and the second flat portion 32 are spaced apart, and the through hole h corresponds to the space between the first flat portion 31 and the second flat portion 32 .

[0048] The first flat layer and the first flat portion are provided at least in the first circuit area, which means that the first flat layer and the first flat portion can be provided only in the first circuit area, or the first flat layer and the first flat portion can be provided in both the first circuit area and the second circuit area, which is not specifically limited here.

[0049] The materials of the first flat layer and the first flat portion are not specifically limited here. For example, the materials of the first flat layer and the first flat portion may both be organic materials.

[0050] There is no specific limitation on the structure and materials of the encapsulation layer. The encapsulation layer may be a single-layer structure composed of inorganic materials; or, the encapsulation layer may be a multi-layer structure composed of inorganic materials and organic materials. For example, the multi-layer structure may be a stacked structure composed of a first inorganic layer, an organic layer and a second inorganic layer.

[0051] The encapsulation layer is at least provided in the first circuit area, which means that the encapsulation layer can be provided only in the first circuit area; or the encapsulation layer can be provided in both the first circuit area and the second circuit area, which is not specifically limited here.

[0052] The size of the preset range is not limited here. The preset range only needs to ensure that there is almost no height difference between the portion of the packaging layer corresponding to the through hole and the portion of the packaging layer corresponding to the portion of the first flat layer that does not overlap with the first flat portion.

[0053] The material of the substrate is not limited here, and it may include a flexible material, such as polyimide (PI); or a rigid material, such as glass.

[0054] In the display panel provided by the embodiment of the present invention, the distance from the portion of the encapsulation layer corresponding to the non-overlapping portion of the first flat layer and the first flat portion to the substrate is the first distance, and the distance from the portion of the encapsulation layer corresponding to the through hole to the substrate is the second distance. The difference between the first distance and the second distance is within a preset range, that is, the portion of the encapsulation layer corresponding to the through hole and the portion of the encapsulation layer corresponding to the non-overlapping portion of the first flat layer and the first flat portion have almost no step difference. In this way, if it is necessary to graphically form other functional film layers or wiring of other functional film layers on the encapsulation layer later, the functional film layer or wiring of the functional film layer in the through hole can be effectively removed by exposure, and the functional film layer or wiring of the functional film layer can be avoided as much as possible from being electrically connected to the functional film layer or wiring of the functional film layer in the through hole, thereby improving the performance of the functional film layer, and then improving the performance of the display panel.

[0055] In order to facilitate manufacturing while ensuring that there is almost no height difference between the portion of the encapsulation layer corresponding to the through hole and the portion of the encapsulation layer corresponding to the portion of the first flat layer that does not overlap with the first flat portion, optionally, the preset range includes 0.3-1.2 μm.

[0056] There is no limitation on the specific numerical value of the preset range. For example, the preset range may be 0.3 μm, 0.5 μm, 0.7 μm or 1.2 μm.

[0057] Optional, reference Figure 4 As shown, the display panel further includes a touch control unit 5 arranged on a side of the encapsulation layer 4 away from the second planar layer 3 .

[0058] The specific position of the touch control unit is not limited here. For example, the touch control unit may be located in the display area and the first drive circuit area; or the touch control unit may be located in the display area, the first drive circuit area, and the second drive circuit area.

[0059] The specific structure of the touch control unit is not limited here, and is for example only. Figure 5 As shown, the touch unit 5 includes a first touch layer 51, a first insulating layer 52, a second touch layer 53 and a second insulating layer 54 which are sequentially stacked on the substrate; the first touch layer 51 and the second touch layer 53 can both be located in the display area, and the first insulating layer 52 and the second insulating layer 54 can be located in the display area, the first circuit area and the second circuit area; wherein, one of the first touch layer and the second touch layer is a metal grid electrode layer, and the other is a bridging metal layer. Specifically, the above-mentioned first touch layer can be a metal grid electrode layer, and at the same time, the second touch layer can be a bridging metal layer; or, the above-mentioned first touch layer can be a bridging metal layer, and at the same time, the second touch layer can be a metal grid electrode layer. In order to obtain a better touch effect, the latter can be selected. The material of the first insulating layer and the second insulating layer here can be any one of silicon nitride, silicon oxide or silicon oxynitride.

[0060] refer to Figure 6 As shown, the metal grid electrode layer 55 may include a driving electrode (TMA electrode) 551 and a sensing electrode (TMB electrode) 552. Each column of driving electrodes 551 is directly connected and electrically connected to the touch driving unit through a TMA line; each row of sensing electrodes 552 is electrically connected to the bridging metal layer through a via penetrating the first insulating layer, and electrically connected to the touch driving unit through a TMB line. Among them, the metal grid electrode layer 55 can be located in the display area, and the TMA line, TMB line, and touch driving unit can be located in the first circuit area. Of course, the TMA line, TMB line, and touch driving unit can also be located in the first circuit area and the second circuit area. The structure of the touch unit belongs to the FMLOC (Flexible Multi-Layer On Cell) touch structure, which can reduce the thickness of the screen, thereby facilitating folding; at the same time, there is no fitting tolerance, which can reduce the frame width; in addition, it can also reduce the risk of cracks.

[0061] The structure of the touch control unit is not limited here. For example, the touch control unit can adopt a mutual capacitance touch control structure or a self capacitance touch control structure. The mutual capacitance touch control structure or the self capacitance touch control structure can be obtained according to relevant technologies and will not be described in detail here.

[0062] In the display panel of the embodiment of the present invention, since there is almost no step difference between the portion of the packaging layer corresponding to the through hole and the portion of the packaging layer corresponding to the portion of the first flat layer that does not overlap with the first flat portion, when structures such as touch wiring are formed on the packaging layer of the first circuit area and / or the second circuit area, the touch wiring is used as an example to illustrate that the wiring material existing in the through hole can be effectively removed by exposure to prevent the touch wiring on the packaging layer from being electrically connected to the wiring material in the through hole, thereby minimizing failure of the touch function and improving the performance of the display panel.

[0063] Optional, reference Figure 4 As shown, the display panel further includes a driving circuit layer and an insulating layer 7 disposed between the substrate 1 and the first flat layer 2, the driving circuit layer being located on the side of the insulating layer 7 away from the substrate; the driving circuit layer includes an unconnected gate driving circuit 61 and a light-emitting driving circuit 62, the gate driving circuit 61, the light-emitting driving circuit 62 and the insulating layer 7 being disposed at least in the first circuit area; the through hole is configured to also penetrate the portion of the display panel located between the gate driving circuit 61 and the light-emitting driving circuit 62 to expose the insulating layer 7. In this way, the through hole will neither affect the manufacture and performance of the gate driving circuit and the light-emitting driving circuit, nor affect the manufacture of subsequent film layers.

[0064] The type of the insulating layer is not specifically limited here. For example, the insulating layer may include only one layer, such as an interlayer dielectric layer or a buffer layer. Of course, the insulating layer may also be a multi-layer structure. Figure 4 The insulating layer is taken as an ILD layer for illustration.

[0065] The above-mentioned gate drive circuit, light-emitting drive circuit and insulating layer are arranged in at least the first circuit area, which means that the gate drive circuit, light-emitting drive circuit and insulating layer are only arranged in the first circuit area. Of course, the gate drive circuit, light-emitting drive circuit and insulating layer can be arranged in both the first circuit area and the second circuit area, and no specific limitation is made here.

[0066] Optionally, the encapsulation layer includes a first inorganic encapsulation layer, an organic encapsulation layer, and a second inorganic encapsulation layer. In this way, the first inorganic encapsulation layer is first formed on the second flat layer, and the first inorganic encapsulation layer can be continuously formed through the through hole, so that there is almost no step difference between the portion of the first inorganic encapsulation layer corresponding to the through hole and the portion of the first inorganic encapsulation layer corresponding to the portion of the first flat layer that does not overlap with the first flat portion, which is conducive to reducing the step difference of subsequent film layers.

[0067] The specific manufacturing process of the first inorganic encapsulation layer, the organic encapsulation layer, and the second inorganic encapsulation layer is not limited here. For example, the first inorganic encapsulation layer and the second inorganic encapsulation layer can be formed by chemical vapor deposition process, but not limited thereto, or physical vapor deposition process, etc. The organic encapsulation layer can be formed by inkjet printing process, but not limited thereto, or spraying process, etc.

[0068] The materials of the first inorganic encapsulation layer and the second inorganic encapsulation layer are not specifically limited here. For example, the materials of the first inorganic encapsulation layer and the second inorganic encapsulation layer may include any one of silicon nitride, silicon oxide or silicon oxynitride.

[0069] For ease of arrangement, optional, refer to Figure 7 As shown, a plurality of through holes h are disposed in the first circuit area B1 and are distributed in a ring shape around the display area AA.

[0070] The shape of the through hole is not specifically limited here, but is exemplified. Figure 7 The through hole is illustrated as a cylinder as an example.

[0071] The number of the rings is not specifically limited here. For example, the plurality of through holes may be distributed in a ring shape, or may be distributed in a plurality of ring shapes. Figure 7 The illustration is made by taking a case where a plurality of through holes are distributed in a ring shape as an example.

[0072] In order to make the through holes on the same ring evenly distributed, optionally, the distances between two adjacent through holes on the same ring are the same.

[0073] For ease of production, optional, reference Figure 8 , Fig. 9 , Fig.10 and Fig.11 As shown, the shape of the through hole h includes any one of a cylinder, a cube or a truncated cone.

[0074] It should be noted that the shape of the through hole may also be other regular or irregular shapes, which is not specifically limited here.

[0075] In order to facilitate the manufacturing process and not affect the performance of the film layer around the through hole, optionally, when the through hole is in the shape of a cylinder, the diameter of the cylinder ranges from 8 to 10 μm.

[0076] There is no specific limitation on the diameter of the cylinder. For example, the diameter of the cylinder may be 8 μm, 9 μm or 10 μm.

[0077] It should be noted that the reference Fig.10 and Fig.11As shown, when the shape of the through hole along the cross-sectional direction parallel to the substrate and the shape of the hole along the cross-sectional direction perpendicular to the substrate are both square, the side length of the through hole can be 4.5 μm.

[0078] An embodiment of the present invention further provides a display device, comprising the above-mentioned display panel.

[0079] The above-mentioned display device may be a flexible display device (also known as a flexible screen), which is not limited here. For example, the display device may be an OLED (Organic Light-Emitting Diode) display device. The above-mentioned display device may be an OLED without a touch function, or an OLED with a touch function, such as FMLOC. The above-mentioned display device is widely used in the fields of identity recognition, medical equipment, etc. Products that have been promoted or have good promotion prospects include mobile phones, security identity authentication, smart door locks, medical image acquisition, etc. The display device has the advantages of good touch performance, good display effect, long life, high stability, high contrast, etc.

[0080] An “embodiment” referred to herein means that a particular feature, structure, or characteristic described in connection with the embodiment is included in at least one embodiment of the present application.

[0081] In the description provided herein, a large number of specific details are described. However, it is understood that the embodiments of the present application can be practiced without these specific details. In some instances, well-known methods, structures and techniques are not shown in detail so as not to obscure the understanding of this description.

[0082] Finally, it should be noted that the above embodiments are only used to illustrate the technical solutions of the present application, rather than to limit it. Although the present application has been described in detail with reference to the aforementioned embodiments, those skilled in the art should understand that they can still modify the technical solutions described in the aforementioned embodiments, or make equivalent replacements for some of the technical features therein. However, these modifications or replacements do not deviate the essence of the corresponding technical solutions from the spirit and scope of the technical solutions of the embodiments of the present application.

Claims

1. A display panel, characterized in that: It includes a display area, a first circuit area and a second circuit area, wherein the first circuit area and the second circuit area are connected and arranged around the display area; The display panel further includes a substrate and a first flat layer, a second flat layer and an encapsulation layer sequentially stacked on the substrate, the second flat layer at least includes a first flat portion, and the first flat layer, the first flat portion and the encapsulation layer are at least arranged in the first circuit area; The display panel has a plurality of through holes, wherein the through holes at least penetrate the first flat layer; the orthographic projection of the first flat portion on the substrate is located on a side of the through hole close to the display area, and a boundary of the first flat portion away from the display area does not overlap with a boundary of the through hole close to the display area; A distance from a portion of the encapsulation layer corresponding to a portion of the first flat layer that does not overlap with the first flat portion to the substrate is a first distance, and a distance from a portion of the encapsulation layer corresponding to the through hole to the substrate is a second distance, and a difference between the first distance and the second distance is within a preset range; The preset range includes 0.3-1.2 μm; The encapsulation layer comprises a first inorganic encapsulation layer, an organic encapsulation layer, and a second inorganic encapsulation layer; The through hole may have a shape of a cylinder, a cube or a truncated cone.

2. The display panel according to claim 1, characterized in that: The display panel further includes a touch control unit disposed on a side of the encapsulation layer away from the second planar layer.

3. The display panel according to claim 1, characterized in that: The display panel further comprises a driving circuit layer and an insulating layer arranged between the substrate and the first flat layer, wherein the driving circuit layer is located on a side of the insulating layer away from the substrate; the driving circuit layer comprises an unconnected gate driving circuit and a light-emitting driving circuit, wherein the gate driving circuit, the light-emitting driving circuit and the insulating layer are arranged at least in the first circuit area; The through hole is configured to also penetrate a portion of the display panel between the gate driving circuit and the light emitting driving circuit to expose the insulating layer.

4. The display panel according to claim 1, characterized in that: The plurality of through holes are disposed in the first circuit area and are distributed in a ring shape around the display area.

5. The display panel according to claim 4, characterized in that: The distances between two adjacent through holes arranged on the same ring are the same.

6. The display panel according to claim 1, characterized in that: In the case where the through hole is in the shape of a cylinder, the diameter of the cylinder may range from 8 to 10 μm.

7. A display device, characterized in that: A display panel comprising any one of claims 1 to 6.

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