Display panel and display device

Abstract

The embodiment of the present invention discloses a display panel and a display device, wherein a padding portion is arranged in a first gap (depression) between a retaining wall structure and a flat layer, and a touch electrode lead is arranged on a side of the retaining wall structure, the flat layer and the padding portion away from a substrate. Since the padding portion reduces the step difference between the retaining wall structure and the depression, when the touch electrode lead is manufactured by a photoresist process, the thickness of the photoresist in the depression reduces the thickness of the padding portion, and the photoresist residue and poor etching in the first gap can be avoided, thereby avoiding the problem of short circuit between the touch electrode leads.

Description

Technical Field

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

[0002] Organic Light Emitting Diode (OLED) is an active light-emitting display device with the advantages of self-luminescence, wide viewing angle, high contrast, low power consumption, and fast response speed. OLED displays are widely accepted by customers due to their bright colors, low power consumption, thinness, and flexibility. With the continuous development of display technology, OLED technology is increasingly used in various display devices, especially in smart terminal products such as mobile phones and tablets.

[0003] In the prior art, OLED display panels usually use an inorganic layer-organic layer-inorganic layer thin film encapsulation (TFE) structure to achieve encapsulation, so as to encapsulate the organic light-emitting material inside the panel, thereby blocking water and oxygen and protecting the organic light-emitting material.

[0004] In order to realize the touch display of OLED display panel, touch electrodes are usually made on the TFE film layer of OLED display panel. In order to realize the control of touch electrodes, it is necessary to form multiple metal leads on the TFE film layer that are electrically connected to the touch electrodes, and the multiple metal leads extend from the display area to the frame area. The inventors of this case found that in the process of testing metal leads, short circuits between different metal leads often occur, which reduces the product yield. Summary of the invention

[0005] The embodiments of the present invention provide a display panel and a display device, which can reduce photoresist residues and further reduce metal residues, so as to solve the short circuit problem between electrode leads of touch electrodes and improve the yield of display panel products.

[0006] An embodiment of the present invention provides a display panel, comprising:

[0007] A base substrate having a display area and a frame area surrounding the display area;

[0008] A retaining wall structure, located in the frame area of ​​the base substrate and surrounding the display area;

[0009] A flat layer, located on the base substrate, wherein an orthographic projection of the flat layer on the base substrate and an orthographic projection of the retaining wall structure on the base substrate do not overlap each other, and a first gap exists between the retaining wall structure and the flat layer;

[0010] A raised portion, located in the first gap;

[0011] A touch electrode lead is located on a side of the retaining wall structure, the flat layer and the raised portion away from the base substrate, and the touch electrode lead extends from the display area to the frame area.

[0012] Optionally, the above-mentioned display panel provided in an embodiment of the present invention further includes a connecting bridge located between the flat layer and the touch electrode lead, and the connecting bridge and the touch electrode lead are electrically connected; wherein the orthographic projection of the connecting bridge on the base substrate is located within the orthographic projection range of the flat layer on the base substrate.

[0013] Optionally, in the above-mentioned display panel provided by an embodiment of the present invention, the raised portion and the connecting bridge are provided in the same layer and with the same material.

[0014] Optionally, in the above display panel provided by an embodiment of the present invention, the raised portion is a closed annular structure.

[0015] Optionally, in the above-mentioned display panel provided in an embodiment of the present invention, the retaining wall structure includes a first retaining wall and a second retaining wall located between the first retaining wall and the display area, a second gap is provided between the first retaining wall and the second retaining wall, and the raised portion is provided in the second gap.

[0016] Optionally, in the above-mentioned display panel provided by the embodiment of the present invention, it further includes an insulating layer located between the connecting bridge and the touch electrode lead, and the connecting bridge and the touch electrode lead are electrically connected through a via hole penetrating the insulating layer.

[0017] Optionally, in the above display panel provided by an embodiment of the present invention, the flat layer includes a first flat portion and a second flat portion, the first flat portion is surrounded by the retaining wall structure, and the second flat portion surrounds the retaining wall structure; the first flat portion and the retaining wall structure are both provided with the first gap, and the second flat portion and the retaining wall structure are both provided with the connecting bridge on one side of the first flat portion and the second flat portion facing away from the base substrate;

[0018] The vias include a first via and a second via, the connection bridge on the side of the first flat portion facing away from the base substrate and the touch electrode lead are electrically connected through the first via, and the connection bridge on the side of the second flat portion facing away from the base substrate and the touch electrode lead are electrically connected through the second via.

[0019] Optionally, in the above display panel provided by the embodiment of the present invention, it further includes: an encapsulation layer located between the flat layer and the raised portion and covering the flat layer, the first gap and the retaining wall structure, and a barrier layer located between the raised portion and the encapsulation layer;

[0020] The encapsulation layer includes organic layers and inorganic layers that are alternately stacked, the inorganic layers cover the display area and the frame area, and the organic layers cover the display area and stop at a side of the second retaining wall close to the display area.

[0021] Optionally, in the above-mentioned display panel provided in an embodiment of the present invention, the display area includes: a pixel defining layer located between the planar layer and the encapsulation layer, and a spacer layer located between the pixel defining layer and the encapsulation layer; the retaining wall structure reuses at least one of the planar layer, the pixel defining layer, and the spacer layer.

[0022] Correspondingly, an embodiment of the present invention further provides a display device, comprising any one of the above-mentioned display panels provided by the embodiment of the present invention.

[0023] The beneficial effects of the embodiments of the present invention are as follows:

[0024] In a display panel and a display device provided by an embodiment of the present invention, a padding portion is provided in a first gap (depression) between a retaining wall structure and a flat layer, and a touch electrode lead is provided on a side of the retaining wall structure, the flat layer and the padding portion away from the substrate. Since the padding portion reduces the step difference between the retaining wall structure and the depression, when the touch electrode lead is manufactured by a photoresist process, the thickness of the photoresist in the depression reduces the thickness of the padding portion, and the photoresist residue and poor etching in the first gap can be avoided, thereby avoiding the problem of short circuit between the touch electrode leads. BRIEF DESCRIPTION OF THE DRAWINGS

[0025] Figure 1A is a schematic diagram of the planar structure of a display panel;

[0026] Figure 1B for Figure 1A Schematic diagram of the cross section along CC' direction;

[0027] Figure 1C for Figure 1B A schematic diagram of a whole bottom metal layer deposited to make bottom metal leads;

[0028] Figure 1D for Figure 1C Schematic diagram of applying photoresist when making the bottom metal lead;

[0029] Figure 1E This is a schematic diagram of metal residues that appear when making the bottom metal lead;

[0030] Figure 2 A schematic diagram of the structure of a display panel provided by an embodiment of the present invention;

[0031] Figure 3 for Figure 2Schematic diagram of the structure of the middle membrane layer;

[0032] Figure 4 for Figure 3 The corresponding planar structure diagram;

[0033] Figure 5 A schematic diagram of photoresist applied when making touch electrode leads;

[0034] Figure 6 This is a plan view of the touch electrode leads after fabrication. DETAILED DESCRIPTION

[0035] In order to make the purpose, technical solutions and advantages of the present invention clearer, the specific implementation of the display panel and the display device provided by the embodiments of the present invention are described in detail below in conjunction with the accompanying drawings. It should be understood that the preferred embodiments described below are only used to illustrate and explain the present invention, and are not used to limit the present invention. In addition, the embodiments in this application and the features in the embodiments can be combined with each other if there is no conflict.

[0036] The thickness, size and shape of each film layer in the drawings do not reflect the actual proportion of the display panel, and the purpose is only to illustrate the content of the present invention.

[0037] After the OLED display panel adopts the inorganic layer-organic layer-inorganic layer thin film encapsulation structure (TFE), the organic light-emitting material can be encapsulated inside the panel, which improves the panel's water and oxygen barrier performance. However, the combination of the inorganic layer (material such as silicon nitride) and its lower side material cannot achieve a completely ideal water and oxygen barrier effect. Water and oxygen may still invade the interior of the OLED from the peripheral position of the TFE film layer along the interface between the TFE and the lower side film layer.

[0038] In order to avoid the intrusion of water and oxygen, before the TFE packaging process is carried out, a retaining wall structure is made on the periphery of the display area, that is, the frame area. The retaining wall structure generally includes at least one retaining wall. Take two retaining walls as an example, such as a first retaining wall close to the display area and a second retaining wall located on the side of the first retaining wall away from the display area. The retaining wall structure (the first retaining wall and the second retaining wall) is covered with a first inorganic layer and a second inorganic layer of TFE. In the aging test, it was found that in a high temperature and high humidity environment, compared with a display panel with a retaining wall structure, the organic light-emitting material of the display panel without a retaining wall structure is prone to problems more quickly. Therefore, after the retaining wall structure is set, the water and oxygen barrier performance of the display panel is greatly improved.

[0039] Figure 1A This is a schematic diagram of the planar structure after the touch electrodes are set on the OLED display panel. Figure 1B for Figure 1AA plurality of touch electrodes 1 and a plurality of touch electrode leads 2 are arranged on the TFE film layer of the OLED display panel, and the touch electrode leads 2 are electrically connected to the corresponding touch electrode rows or touch electrode columns. The touch electrode leads 2 extend from the display area AA to the frame area BB, as shown in FIG. Figure 1A The touch electrode lead 2 needs to cross the retaining wall structure (the first retaining wall 3 and the second retaining wall 4). The first retaining wall 3 and the second retaining wall 4 can be formed by stacking sub-retaining walls arranged at the same layer as the flat layer, pixel defining layer, and spacer layer in the display area, as shown in FIG. Figure 1B As shown, the first retaining wall 3 is composed of sub-retaining walls (31 and 32) arranged at the same layer as the flat layer 5 and the pixel defining layer 6 in the display area, and the second retaining wall 4 is composed of sub-retaining walls (41 and 42) arranged at the same layer as the flat layer 5 and the pixel defining layer 6 in the display area. Usually, the height of the first retaining wall 3 close to the display area is less than the height of the second retaining wall 4. Of course, the height of the first retaining wall 3 can also be equal to the height of the second retaining wall 4 (taking the height of the two retaining walls as the same as an example). Figure 1B As shown, the first inorganic layer 7 and the second inorganic layer 8 in the TFE cover the first retaining wall 3 and the second retaining wall 4, and the boundary of the organic layer 9 in the TFE generally ends at the side of the first retaining wall 3 close to the display area, and the touch electrode lead 2 needs to cross the first retaining wall 3 and the second retaining wall 4 and lead to the frame area. Figure 1B As shown, in order to reduce the resistance of the touch electrode lead 2, the touch electrode lead 2 generally uses a double-layer metal wiring (21 and 22), and the double-layer metal wiring (21 and 22) is electrically connected through a via hole penetrating the insulating layer 11. Each layer of metal wiring is formed by a photoresist process. When forming the bottom metal wiring 21 of the touch electrode lead 2, a whole layer of the bottom metal layer is first deposited, such as Figure 1C as shown; Figure 1D As shown, a photoresist 12 is coated on a whole layer of the bottom metal layer. Since there is a height difference between the low-lying areas around the first retaining wall 3 and the second retaining wall 4 and the first retaining wall 3 and the second retaining wall 4, the photoresist 12 is thickly accumulated in the low-lying areas around the first retaining wall 3 and the second retaining wall 4 (the thickness of the photoresist 12 accumulated in the low-lying areas is shown by the double-headed arrow H), which is difficult to be effectively removed by exposure and development, resulting in photoresist residues, which in turn leads to poor etching, thereby forming metal residues in the low-lying areas. Figure 1E As shown, Figure 1E for Figure 1C The schematic plan view of the bottom metal wiring 21 after etching, the residual metal 13 causes short circuits between different bottom metal wirings 21, reducing the product yield.

[0040] In order to solve the above technical problems, an embodiment of the present invention provides a display panel such as Figure 2 As shown, including:

[0041] The base substrate 10 has a display area AA and a frame area BB surrounding the display area AA;

[0042] The retaining wall structure 20 is located in the frame area BB of the base substrate 10 and surrounds the display area AA;

[0043] A flat layer 30 is located on the base substrate 10, the orthographic projection of the flat layer 30 on the base substrate 10 and the orthographic projection of the retaining wall structure 20 on the base substrate 10 do not overlap each other, and a first gap DD is formed between the retaining wall structure 20 and the flat layer 30;

[0044] The raised portion 40 is located in the first gap DD;

[0045] The touch electrode lead 50 is located on a side of the retaining wall structure 20 , the flat layer 30 and the raised portion 40 away from the base substrate 10 . The touch electrode lead 50 extends from the display area AA to the frame area BB.

[0046] In the display panel provided by the embodiment of the present invention, the padding portion 40 is arranged in the first gap DD (depression) between the retaining wall structure 20 and the flat layer 30, and the touch electrode lead 50 is arranged on the side of the retaining wall structure 20, the flat layer 30 and the padding portion 40 away from the base substrate 10. Since the padding portion 40 reduces the step difference between the retaining wall structure 20 and the depression, when the touch electrode lead 50 is manufactured by using a photoresist process, the thickness of the photoresist in the depression reduces the thickness of the padding portion 40, which can avoid the photoresist residue and poor etching in the first gap DD, thereby avoiding the problem of short circuit between the touch electrode leads 50.

[0047] In a specific implementation, the retaining wall structure may include only one retaining wall. However, in order to prevent the organic layer from crossing the retaining wall during subsequent TFE encapsulation, the retaining wall structure generally includes two retaining walls, such as Figure 2 As shown, the retaining wall structure 20 provided in the embodiment of the present invention includes a first retaining wall 21 and a second retaining wall 22 located between the first retaining wall 21 and the display area AA, and a second gap EE is provided between the first retaining wall 21 and the second retaining wall 22, and a padding portion 40 is provided in the second gap EE. That is, when the retaining wall structure 20 includes only one retaining wall, a padding portion 40 is provided in the first gap DD between the retaining wall structure 20 and the flat layer 30; when the retaining wall structure 20 includes the first retaining wall 21 and the second retaining wall 22, a padding portion 40 is provided in the first gap DD between the first retaining wall 21 and the flat layer 30, in the first gap DD between the second retaining wall 22 and the flat layer 30, and in the second gap EE between the first retaining wall 21 and the second retaining wall 22. Of course, the embodiment of the present invention is not limited to the first retaining wall 21 and the second retaining wall 22, and more retaining walls can be provided as needed, but a padding portion 40 needs to be provided in the first gap between the retaining wall and the flat layer and in the second gap between adjacent retaining walls.

[0048] In a specific implementation, in order to reduce the resistance of the touch electrode lead to improve the touch effect, in the above-mentioned display panel provided by the embodiment of the present invention, as Figure 2 As shown, it also includes a connecting bridge 60 located between the flat layer 30 and the touch electrode lead 50. The connecting bridge 60 and the touch electrode lead 50 are electrically connected. The connecting bridge 60 and the touch electrode lead 50 are equivalent to being connected in parallel. The resistance after the parallel connection is less than the resistance of the touch electrode lead 50 before the connecting bridge 60 is set, so the resistance of the touch electrode lead 50 can be reduced; since the orthographic projection of the flat layer 30 on the base substrate 10 and the orthographic projection of the retaining wall structure 20 on the base substrate 10 do not overlap with each other, the orthographic projection of the connecting bridge 60 on the base substrate 10 is located within the orthographic projection range of the flat layer 30 on the base substrate 10. Therefore, when the connecting bridge 60 is manufactured by using a photoresist process, it is equivalent to retaining only the part located on the flat layer 30 as the connecting bridge 60. The surface of the flat layer 30 is relatively flat, and there is no residue after photoresist etching. Independently set connecting bridges 60 can be etched out, and no short circuit will occur between adjacent connecting bridges 60.

[0049] In specific implementation, Figure 2 As shown, in the embodiment of the present invention, the padding portion 40 can be firstly made in the first gap DD and the second gap EE, and then a whole layer of metal layer is deposited, and the metal layer is exposed, developed and etched to form a connecting bridge 60 located only above the flat layer 30, and the metal layer at the rest of the position is completely etched away. However, the process of making the padding portion 40 and the connecting bridge 60 using different composition processes will increase one mask and increase the process cost. Therefore, in order to reduce the step difference between the retaining wall structure 20 and the low-lying part, simplify the process steps and reduce the process cost, the embodiment of the present invention sets the padding portion 40 and the connecting bridge 60 with the same layer and the same material, so that the padding portion 40 and the connecting bridge 60 can be made through one composition process. The pattern of the padding portion 40 and the connecting bridge 60 is formed, thereby simplifying the process steps and reducing the process cost; wherein, the padding portion 60 is located in the first gap DD and the second gap EE, which can reduce the step difference between the retaining wall structure 20 and the low-lying part. When the touch electrode lead 50 is subsequently made by the photoresist process, the thickness of the photoresist in the low-lying part can be reduced, and the residual photoresist and poor etching in the first gap DD and the second gap EE can be avoided, thereby avoiding the problem of short circuit between the touch electrode leads 50; the connecting bridge 60 is located above the flat layer 30, and the connecting bridge 60 is electrically connected to the touch electrode lead 50, which can reduce the resistance of the touch electrode lead 50 and improve the touch effect.

[0050] like Figure 3 and Figure 4 As shown, Figure 3 This is a cross-sectional view of the connection bridge 60 and the raised portion 40 after they are manufactured. Figure 4 for Figure 3From the schematic diagram of the partial membrane layer, it can be seen that the connecting bridges 60 are only located on the flat layer 30, and the raised portion 40 is located in the low-lying area around the retaining wall structure (21 and 22). The connecting bridges 60 and the raised portion 40 are disconnected to avoid the problem of short circuit of the connecting bridges 60 in the low-lying area, and the raised portion 40 can reduce the step difference between the retaining wall structure and the low-lying area. Figure 5 As shown, Figure 5 FIG. 1 is a schematic diagram of coating a photoresist 70 when manufacturing a touch electrode line 50. Since the thickness of the entire metal layer deposited to manufacture the touch electrode lead 50 is substantially equal at each position, Figure 5 The entire metal layer deposited to form the touch electrode leads 50 is not shown, only the photoresist 70 is shown. It can be seen that the thickness of the photoresist 70 in the low-lying area is reduced by the thickness of the pad 40, thereby avoiding the photoresist residue and poor etching in the low-lying area, thereby avoiding the problem of short circuit between the touch electrode leads 50. Figure 6 As shown, Figure 6 To complete the plan view of the touch electrode leads 50 , due to the effect of the raised portion 40 , when the entire metal layer used to make the touch electrode leads 50 is etched, the metal layer will not remain, thereby obtaining independently arranged touch electrode leads 50 .

[0051] In a specific implementation, in the above-mentioned display panel provided in an embodiment of the present invention, since the first retaining wall and the second retaining wall are both closed annular structures surrounding the display area, in order to avoid the problem of short circuit between any two adjacent touch electrode leads, the raised portion is a closed annular structure, so that the photoresist will not remain or be poorly etched at any position in the low-lying area.

[0052] In a specific implementation, in the above display panel provided in the embodiment of the present invention, if Figure 2 As shown, an insulating layer 80 is also included between the connecting bridge 60 and the touch electrode lead 50, and the connecting bridge 60 and the touch electrode lead 50 are electrically connected through vias (V1 and V2) penetrating the insulating layer 80. Specifically, the material of the insulating layer 80 can be silicon nitride or the like.

[0053] In a specific implementation, in the above display panel provided in the embodiment of the present invention, if Figure 2 As shown, the flat layer 30 includes a first flat portion 31 and a second flat portion 32, the first flat portion 31 is surrounded by the retaining wall structure 20, and the second flat portion 32 surrounds the retaining wall structure 20; a first gap DD is provided between the first flat portion 31 and the retaining wall structure 20, and between the second flat portion 32 and the retaining wall structure 20, and a connecting bridge 60 is provided on the side of the first flat portion 31 and the second flat portion 32 facing away from the base substrate 10, so as to further reduce the resistance of the touch electrode lead 50;

[0054] The vias (V1 and V2) include a first via V1 and a second via V2. The connecting bridge 60 and the touch electrode lead 50 on the side of the first flat portion 31 away from the base substrate 10 are electrically connected through the first via V1. The connecting bridge 60 and the touch electrode lead 50 on the side of the second flat portion 32 away from the base substrate 10 are electrically connected through the second via V2.

[0055] In a specific implementation, in the above display panel provided in the embodiment of the present invention, if Figure 2 As shown, it also includes: an encapsulation layer 90 located between the flat layer 30 and the raised portion 40 and covering the flat layer 30, the first gap DD and the retaining wall structure 20, and a barrier layer (not shown) located between the raised portion 40 and the encapsulation layer 90;

[0056] The encapsulation layer 90 includes organic layers and inorganic layers that are alternately stacked. In the embodiment of the present invention, the encapsulation layer 90 includes a first inorganic layer 91, an organic layer 92, and a second inorganic layer 93 that are alternately stacked as an example. The first inorganic layer 91 and the second inorganic layer 93 cover the display area AA and the frame area BB, and the organic layer 92 covers the display area AA and stops at the side of the second retaining wall 22 close to the display area AA.

[0057] In a specific implementation, in the above display panel provided in the embodiment of the present invention, if Figure 2 As shown, the display area AA includes: a pixel defining layer 100 located between the flat layer 30 and the encapsulation layer 90, and a spacer layer (not shown) located between the pixel defining layer 100 and the encapsulation layer 90; the retaining wall structure 20 reuses at least one of the flat layer 30, the pixel defining layer 100, and the spacer layer. In the embodiment of the present invention, the retaining wall structure 20 reuses the flat layer 30 and the pixel defining layer 100, that is, the first retaining wall 21 includes a first sub-retaining wall 211 arranged at the same layer as the flat layer 30 and a second sub-retaining wall 212 arranged at the same layer as the pixel defining layer 100, and the second retaining wall 22 includes a third sub-retaining wall 221 arranged at the same layer as the flat layer 30 and a fourth sub-retaining wall 222 arranged at the same layer as the pixel defining layer 100.

[0058] In a specific implementation, in the above display panel provided in the embodiment of the present invention, if Figure 2 As shown, it also includes a touch electrode 110 located in the display area AA and located on the insulating layer 80. The touch electrode 110 is arranged in the same layer as the touch electrode lead 50, and the touch electrode lead 50 is electrically connected to the corresponding touch electrode row or touch electrode column. It also includes a bridging electrode (not shown) located in the display area AA. The bridging electrode is used to electrically connect two adjacent touch electrodes in the touch electrode column or touch electrode row. The bridging electrode can be arranged in the same layer as the connecting bridge 60.

[0059] In a specific implementation, in the above display panel provided in the embodiment of the present invention, if Figure 2As shown, it also includes: an anode 120 located between the pixel defining layer 100 and the planar layer 30, an organic light-emitting layer 130 located between the anode 120 and the encapsulation layer 90, and a cathode 140 located between the organic light-emitting layer 130 and the encapsulation layer 90; of course, the display panel provided in the embodiment of the present invention also includes other functional film layers well known to those skilled in the art, which will not be described in detail here.

[0060] In summary, when manufacturing the connection bridge 60, the embodiment of the present invention simultaneously manufactures the connection bridge 60 for connecting in parallel with the touch electrode lead 50 and the raised portion 40 located in the low-lying area around the retaining wall structure 20 through a single patterning process. The connection bridge 60 is only located on the flat layer 30 and is disconnected from the raised portion 40 located in the low-lying area, which can avoid the problem of the above-mentioned problems in the related art. Figure 1E In that way, a whole bottom metal trace 21 is manufactured, and metal residues are formed in the low-lying areas, resulting in short circuits between different bottom metal traces 21. In addition, the raised portion 40 can reduce the thickness of the photoresist 70 in the low-lying areas by an amount equivalent to the thickness of the raised portion 40, thereby avoiding residues and poor etching of the photoresist used in the subsequent manufacture of the touch electrode leads 50 in the low-lying areas, thereby avoiding short circuits between the touch electrode leads 50.

[0061] Based on the same inventive concept, an embodiment of the present invention further provides a display device, including the above-mentioned display panel provided in an embodiment of the present invention. The display device can be any product or component with a display function, such as a mobile phone, a tablet computer, a television, a monitor, a notebook computer, a digital photo frame, a navigator, etc. The implementation of the display device can refer to the above-mentioned embodiment of the display panel, and the repeated parts will not be repeated.

[0062] In a display panel and a display device provided by an embodiment of the present invention, a padding portion is provided in a first gap (depression) between a retaining wall structure and a flat layer, and a touch electrode lead is provided on a side of the retaining wall structure, the flat layer and the padding portion away from the substrate. Since the padding portion reduces the step difference between the retaining wall structure and the depression, when the touch electrode lead is manufactured by a photoresist process, the thickness of the photoresist in the depression reduces the thickness of the padding portion, and the photoresist residue and poor etching in the first gap can be avoided, thereby avoiding the problem of short circuit between the touch electrode leads.

[0063] Obviously, those skilled in the art can make various changes and modifications to the present invention without departing from the spirit and scope of the present invention. Thus, if these modifications and variations of the present invention fall within the scope of the claims of the present invention and their equivalents, the present invention is also intended to include these modifications and variations.

Claims

1. A display panel, characterized in that: include: A base substrate having a display area and a frame area surrounding the display area; A retaining wall structure, located in the frame area of ​​the base substrate and surrounding the display area; A flat layer, located on the base substrate, wherein an orthographic projection of the flat layer on the base substrate and an orthographic projection of the retaining wall structure on the base substrate do not overlap each other, and a first gap exists between the retaining wall structure and the flat layer; A raised portion, located in the first gap; A touch electrode lead is located on a side of the retaining wall structure, the flat layer and the raised portion away from the base substrate, and the touch electrode lead extends from the display area to the frame area; It also includes a connecting bridge located between the flat layer and the touch electrode lead, the connecting bridge and the touch electrode lead are electrically connected; wherein the orthographic projection of the connecting bridge on the substrate is located within the orthographic projection range of the flat layer on the substrate; The raised portion and the connecting bridge are provided in the same layer and with the same material.

2. The display panel according to claim 1, characterized in that: The raised portion is a closed annular structure.

3. The display panel according to any one of claims 1 or 2, characterized in that: The retaining wall structure includes a first retaining wall and a second retaining wall located between the first retaining wall and the display area. A second gap is provided between the first retaining wall and the second retaining wall. The raising portion is provided in the second gap.

4. The display panel according to claim 3, characterized in that: It also includes an insulating layer located between the connecting bridge and the touch electrode lead, and the connecting bridge and the touch electrode lead are electrically connected through a via hole penetrating the insulating layer.

5. The display panel according to claim 4, characterized in that: The flat layer comprises a first flat portion and a second flat portion, wherein the first flat portion is surrounded by the retaining wall structure, and the second flat portion surrounds the retaining wall structure; the first gap is provided between the first flat portion and the retaining wall structure, and the first gap is provided between the second flat portion and the retaining wall structure, and the connecting bridge is provided on the side of the first flat portion and the second flat portion facing away from the substrate; The vias include a first via and a second via, the connection bridge on the side of the first flat portion facing away from the base substrate and the touch electrode lead are electrically connected through the first via, and the connection bridge on the side of the second flat portion facing away from the base substrate and the touch electrode lead are electrically connected through the second via.

6. The display panel according to claim 5, characterized in that: Also includes: an encapsulation layer located between the flat layer and the raised portion and covering the flat layer, the first gap and the retaining wall structure, and a barrier layer located between the raised portion and the encapsulation layer; The encapsulation layer includes organic layers and inorganic layers that are alternately stacked, the inorganic layers cover the display area and the frame area, and the organic layers cover the display area and stop at a side of the second retaining wall close to the display area.

7. The display panel according to claim 6, characterized in that: The display area includes: a pixel defining layer located between the planar layer and the encapsulation layer, and a spacer layer located between the pixel defining layer and the encapsulation layer; the retaining wall structure reuses at least one of the planar layer, the pixel defining layer and the spacer layer.

8. A display device, characterized in that: Comprising the display panel according to any one of claims 1-7.

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