Display panel, preparation method thereof and display device

Abstract

The invention discloses a display panel and a preparation method thereof and a display device.The display panel comprises a display area, the display area comprises an isolation area and a main screen area located on the periphery of the isolation area, the display panel comprises a substrate, an isolation column and a protection column, the isolation column is arranged on one side of the substrate and located in the isolation area, the isolation column comprises a first isolation layer, and the protection column comprises a second isolation layer; the material of the first isolation layer comprises a first material; the protection column and the isolation column are arranged on the same side of the substrate and located in the isolation area, the protection column comprises a first protection layer, the material of the first protection layer comprises a second material, the first protection layer is electrically connected with the first isolation layer, and the metal activity of the first material is higher than that of the second material. According to the display panel, the protection columns and the isolation columns are arranged, so that a primary battery structure is formed between the protection columns and the isolation columns, meanwhile, metal ions generated in the preparation process of the display panel can be deposited on the surfaces of the protection columns and cannot be deposited on the surfaces of the isolation columns, and the yield of the display panel is guaranteed.

Description

Technical Field

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

[0002] The current mainstream mobile phone screens pursue an ultra-high screen-to-body ratio close to 100%, that is, full-screen mobile phones. However, the front camera is indispensable in mobile phones. Therefore, the active matrix organic light-emitting diode (AMOLED) with an ultra-thin and flexible screen can be produced by combining the hole-punch screen technology. This display technology is the mainstream technical solution for mobile phone screens. Specifically, the hole-punch screen technology is to dig out a camera channel at the position of the screen camera for the front camera to use. This position is not used for display, so the selection of the hole diameter should consider reducing the impact on the screen display effect. However, the hole-punch technology in the prior art will have a negative impact on the yield and display effect of the display panel.

[0003] In order to improve the display effect and yield of the display panel, it is urgent to improve the display panel. Summary of the invention

[0004] The present application mainly provides a display panel and a manufacturing method thereof and a display device, which can improve the display effect and yield of the display panel.

[0005] In order to solve the above technical problems, the technical solution adopted in the present application is: a display panel is provided, which includes a display area, the display area includes an isolation area and a main screen area located outside the isolation area, the display panel includes a substrate, an isolation column and a protective column, wherein the isolation column is arranged on one side of the substrate and located in the isolation area, the isolation column includes a first isolation layer, and the material of the first isolation layer includes a first material; the protective column and the isolation column are arranged on the same side of the substrate and located in the isolation area, the protective column includes a first protective layer, and the material of the first protective layer includes a second material, wherein the first protective layer is electrically connected to the first isolation layer, and the metal activity of the first material is stronger than the metal activity of the second material.

[0006] To solve the above technical problems, another technical solution adopted in the present application is: providing a method for preparing a display panel, wherein the display panel includes an isolation area and a main screen area located outside the isolation area, and the isolation area also includes an opening area; the preparation method includes: forming an isolation column and a protective column on one side of a substrate, wherein the isolation column and the protective column are both located in the isolation area, and the isolation column includes a first isolation layer, the material of the first isolation layer includes a first material, the protective column includes a first protective layer, the material of the first protective layer includes a second material, the first protective layer is electrically connected to the first isolation layer, and the metal activity of the first material is stronger than the metal activity of the second material; digging a hole in the isolation area to form an opening area.

[0007] In order to solve the above technical problem, another technical solution adopted by the present application is: to provide a display device, which includes the display panel described in the above embodiment.

[0008] The beneficial effect of the present application is: in the present application, the metal activity of the first material is stronger than the metal activity of the second material, and the two are electrically connected, so that a primary battery structure is formed between the protective column and the isolation column. At the same time, the metal ions generated during the preparation of the display panel will be deposited on the surface of the protective column, and will not be deposited on the surface of the isolation column, thereby ensuring the yield of the display panel. BRIEF DESCRIPTION OF THE DRAWINGS

[0009] In order to more clearly illustrate the technical solutions in the embodiments of the present application, the following briefly introduces the drawings required for the description of the embodiments. Obviously, the drawings described below are only some embodiments of the present application. For ordinary technicians in this field, other drawings can be obtained based on these drawings without creative work. Among them:

[0010] Figure 1 This is a schematic structural diagram of an embodiment of a display panel in the present application;

[0011] Figure 2 for Figure 1 A schematic structural diagram of an implementation scheme of a display panel isolation area;

[0012] Figure 3 is a cross-sectional view of an embodiment of a display panel in the present application;

[0013] Figure 4 A top view of an implementation of a display panel isolation area in the present application;

[0014] Figure 5 A top view of another embodiment of the isolation area of ​​the display panel in the present application;

[0015] Figure 6 for Figure 5 A cross-sectional view of an embodiment of a display panel;

[0016] Figure 7 for Figure 5 A cross-sectional view of another embodiment of the display panel;

[0017] Figure 8 This is a schematic structural diagram of an implementation scheme of an isolation column and a protection column in a display panel in the present application;

[0018] Fig. 9 It is a schematic diagram of a process of an embodiment of a method for preparing a display panel in the present application;

[0019] Explanation of the reference numerals: 10 display panel; 11 opening area; 12 isolation area; 13 main screen area; 20 substrate; 30 isolation column; 31 first isolation layer; 32 second isolation layer; 33 third isolation layer; 40 protective column; 41 first protective layer; 42 second protective layer; 43 third protective layer; 51 light-emitting element; 52 first electrode; 53 light-emitting material layer; 54 second electrode; 60 connecting wiring; 61 wiring segment; 71 first hole area; 72 cutting area; 73 second hole area; 80 blocking wall; 90 organic layer. DETAILED DESCRIPTION

[0020] The following will be combined with the drawings in the embodiments of the present application to clearly and completely describe the technical solutions in the embodiments of the present application. Obviously, the described embodiments are only part of the embodiments of the present application, not all of the embodiments. Based on the embodiments in the present application, all other embodiments obtained by ordinary technicians in this field without creative work are within the scope of protection of this application.

[0021] Unless otherwise defined, all technical and scientific terms used herein have the same meaning as commonly understood by technicians in the technical field to which this application belongs; the terms used herein are only for the purpose of describing specific embodiments and are not intended to limit this application; the terms "including" and "having" in the specification and claims of this application and the above-mentioned figure descriptions and any variations thereof are intended to cover non-exclusive inclusions.

[0022] In the description of the embodiments of the present application, the technical terms "first", "second", etc. are only used to distinguish different objects, and cannot be understood as indicating or implying relative importance or implicitly indicating the number, specific order or primary and secondary relationship of the indicated technical features. In the description of the embodiments of the present application, the meaning of "multiple" is more than two, unless otherwise clearly and specifically defined.

[0023] Reference to "embodiments" herein means that a particular feature, structure, or characteristic described in conjunction with the embodiments may be included in at least one embodiment of the present application. The appearance of the phrase in various locations in the specification does not necessarily refer to the same embodiment, nor is it an independent or alternative embodiment that is mutually exclusive with other embodiments. It is explicitly and implicitly understood by those skilled in the art that the embodiments described herein may be combined with other embodiments.

[0024] In the description of the embodiments of the present application, unless otherwise clearly specified and limited, technical terms such as "installed", "connected", "connected", "fixed" and the like should be understood in a broad sense. For example, it can be a fixed connection, a detachable connection, or an integral connection; it can be a mechanical connection or an electrical connection; it can be a direct connection or an indirect connection through an intermediate medium, and it can be the internal connection of two elements or the interaction relationship between two elements. For those of ordinary skill in the art, the specific meanings of the above terms in the embodiments of the present application can be understood according to the specific circumstances.

[0025] The inventors found that the front camera is currently placed in the hole area of ​​the display panel, and isolation columns are placed around the hole area. The design of the isolation columns can effectively isolate the evaporated material, so that the water and oxygen in the hole area cannot invade the light-emitting elements in the display area, thereby preventing the occurrence of reliability corrosion; however, in the application of metal isolation technology, due to the difference in activity between metal elements, the metal ions in the etching groove during the manufacturing process will be deposited on the surface of the isolation column, and will be adsorbed on the surface of the light-emitting element in the subsequent process, causing the light-emitting element to fail and affecting the display effect.

[0026] Among them, in the application of metal partition technology, due to the use of different metal elements, a substitution reaction between metals occurs. The most typical one is the substitution reaction between the isolation structure using titanium, aluminum, and titanium and the pixel electrode using indium tin oxide, silver, and indium tin oxide. Since the metallic activity of aluminum is stronger than that of silver, during the patterning process of the pixel electrode, the silver (Ag) ions in the etching groove are replaced by a large amount of silver single substance adsorbed on the surface or side of the isolation structure; the adsorbed Ag particles are easily washed to the display area to cause a short circuit between the anode and cathode of the pixel; in addition to the pixel short circuit problem, the reduced Ag single substance will also destroy the structure of the multi-layer thin film stacking package, which is easy to cause cracks in the thin film packaging process, and cannot effectively block water and oxygen, resulting in packaging failure, corrosion of organic light-emitting materials, and large-area black spots and display abnormalities.

[0027] See also Figure 1 , Figure 2 and Figure 3 The present application provides a display panel 10, which includes a display area, the display area includes an isolation area 12 and a main screen area 13 located outside the isolation area 12, the display panel 10 includes a substrate 20, an isolation column 30 and a protective column 40, wherein the isolation column 30 is arranged on one side of the substrate 20 and located in the isolation area 12, the isolation column 30 includes a first isolation layer 31, and the material of the first isolation layer 31 includes a first material; the protective column 40 and the isolation column 30 are arranged on the same side of the substrate 20 and located in the isolation area 12, the protective column 40 includes a first protective layer 41, and the material of the first protective layer 41 includes a second material, wherein the first protective layer 41 is electrically connected to the first isolation layer 31, and the metal activity of the first material is stronger than the metal activity of the second material.

[0028] Specifically, the display area of ​​the display panel 10 includes an isolation area 12 and a main screen area 13, and the main screen area 13 is mainly used for display. The display panel 10 includes a substrate 20, an isolation column 30 and a protective column 40. The isolation column 30 is arranged in the isolation area 12 to prevent water and oxygen from invading the display area. The protective column 40 is arranged on the same side as the isolation column 30, both are located on the same side of the substrate 20, and both are located in the isolation area 12. The isolation column 30 includes a first isolation layer 31 made of a first material, and the protective column 40 includes a first protective layer 41 made of a second material. The metal activity of the first material is stronger than the metal activity of the second material, and the two are electrically connected, so that a galvanic cell structure is formed between the protective column 40 and the isolation column 30, and the protective column 40 is the positive electrode of the galvanic cell, and the isolation column 30 is the negative electrode of the galvanic cell. During the preparation process of the display panel 10, the metal ions in the etching groove will be deposited on the surface of the protective column 40, and will not be deposited on the surface of the isolation column 30, thereby ensuring the yield of the display panel 10.

[0029] Please continue reading Figure 3 , the display panel 10 includes a light-emitting layer, which is arranged on one side of the substrate 20. The light-emitting layer includes a light-emitting element 51 located in the main screen area 13. The light-emitting element 51 includes a first electrode 52, a light-emitting material layer 53 and a second electrode 54 which are sequentially arranged in a direction away from the substrate 20, wherein the protective column 40 is arranged in the same layer as the first electrode 52 and is made of the same material. Specifically, the light-emitting layer, the isolation column 30 and the protective column 40 are arranged on the same side, the light-emitting layer is located in the main screen area 13, the light-emitting element 51 includes a first electrode 52, a light-emitting material layer 53 and a second electrode 54. After the first electrode 52 and the second electrode 54 are energized, the light-emitting material layer 53 is controlled to emit light, and the light-emitting element 51 emits light, thereby realizing the display function of the main screen area 13. In one embodiment, the protective column 40 and the first electrode 52 are arranged in the same layer, which can save the volume of the display panel 10. The protective column 40 and the first electrode 52 are made of the same material, which can save the preparation process and facilitate the preparation of the protective column 40.

[0030] In one embodiment, the protective column 40 and the isolation column 30 are disposed in the same layer. Specifically, the same layer arrangement can save the volume required for preparing the protective column 40 and the isolation column 30 in the display panel 10.

[0031] In one embodiment, the first material includes aluminum, and the second material includes silver. Specifically, the metal activity of the first material is stronger than the metal activity of the second material. When the first material includes aluminum, the second material may include zinc, iron, tin, lead, copper, mercury, silver, platinum, and gold. When the second material includes silver, the first material may include potassium, calcium, sodium, magnesium, aluminum, zinc, iron, tin, lead, copper, and mercury. The first material and the second material are various and can be selected according to actual needs.

[0032] Please continue reading Figure 2 , Figure 3 and Figure 4 , the number of isolation columns 30 is multiple, and the multiple isolation columns 30 are arranged in concentric rings. The display panel 10 further includes a connecting wire 60, which electrically connects the first isolation layer 31 of the multiple isolation columns 30 and the first protective layer 41; wherein the protective column 40 is arranged on the inner side of the multiple isolation columns 30, and the multiple isolation columns 30 are arranged around the protective column 40, or the protective column 40 is arranged around the multiple isolation columns 30. Specifically, the multiple isolation columns 30 are arranged in concentric rings, and the shape of the isolation columns 30 matches the shape of the opening area 11. In another embodiment, the hole area is square in design, and the multiple isolation columns 30 can also be square in design. The connecting wire 60 electrically connects the first isolation layer 31 and the first protective layer 41, so that the original battery structure formed by the isolation columns 30 and the protective columns 40 is conductive.

[0033] In one embodiment, the protective column 40 is disposed inside the plurality of isolation columns 30, and the plurality of isolation columns 30 are disposed around the protective column 40. In another embodiment, the protective column 40 is disposed around the plurality of isolation columns 30. The relative positions of the protective column 40 and the isolation column 30 can be changed according to the actual use scenario.

[0034] Please continue reading Figure 4 The connecting wire 60 is a continuous wire arranged on the same side of the isolation column 30 and the protection column 40, and the orthographic projection of the connecting wire 60 on the substrate 20 intersects with the orthographic projection of the isolation column 30 on the substrate 20 and the orthographic projection of the protection column 40 on the substrate 20. Specifically, the connecting wire 60 intersects with the orthographic projections of the isolation column 30 and the protection column 40 on the substrate 20, so that the isolation column 30 and the protection column 40 are electrically connected through the connecting wire 60. At the same time, the connecting wire 60 is a continuous wire, which facilitates the preparation of the connecting wire 60.

[0035] In one embodiment, the material of the connecting wire 60 includes molybdenum. Molybdenum material is easy to obtain, which is beneficial to the preparation of the connecting wire 60.

[0036] See also Figure 5 The connecting wire 60 includes a plurality of wire segments 61, the first isolation layers 31 in two adjacent isolation columns 30 are electrically connected through a wire segment 61, and the protection column 40 is also electrically connected to the adjacent isolation column 30 through a wire segment 61. Specifically, the design of the plurality of wire segments 61 can ensure the electrical connection between the isolation column 30 and the protection column 40, and the design of the wire segments 61 is flexible.

[0037] In one embodiment, at least some adjacent routing segments 61 are staggered. By staggering some adjacent routing segments 61, stress can be dispersed in the subsequent cutting process to avoid cracks in the isolation area 12, thereby ensuring the processing effect and improving the product yield.

[0038] Please continue reading Figure 5 and Figure 6 , display panel 10, the isolation area 12 in the display panel 10 also includes an opening area 11, the opening area 11 includes a first hole area 71, a cutting area 72 surrounding the first hole area 71, and a second hole area 73 surrounding the cutting area 72, and a plurality of isolation columns 30 are distributed in the first hole area 71, the cutting area 72, and the second hole area 73; wherein, the routing segments 61 distributed in the first hole area 71 are all located on the same side of the isolation column 30 and the protective column 40, and the routing segments 61 distributed in the first hole area 71 are continuous and uninterrupted. Specifically, the opening area 11 is located at the center of the isolation area 12, and the outer contour of the opening area 11 and the outer contour of the isolation area 12 are concentric circles. The first hole area 71, the cutting area 72, and the second hole area 73 are sequentially arranged in the opening area 11. In the first hole area 71, the routing segments 61 are all located on the same side of the isolation column 30 and the protection column 40. Specifically, in the direction shown in the figure, in one embodiment, the routing segments 61 are all located on the left side of the isolation column 30 and the protection column 40, or the routing segments 61 are all located on the right side of the isolation column 30 and the protection column 40. At the same time, the routing segments 61 are continuous and uninterrupted, which facilitates the preparation of the routing segments 61.

[0039] In one embodiment, the wiring segments 61 distributed in the cutting area 72 are staggered. The staggered arrangement facilitates the dispersion of stress during cutting, effectively protects the display panel 10, and improves the yield.

[0040] In one embodiment, the wiring segments 61 distributed in the second hole area 73 are staggered. The staggered arrangement facilitates the dispersion of stress during cutting, effectively protects the display panel 10, and improves the yield.

[0041] In one embodiment, the material of the wiring segments 61 distributed in the first hole area 71 includes molybdenum. The molybdenum material is easy to obtain, which is beneficial to the preparation of the connecting wiring 60.

[0042] In one embodiment, the routing segments 61 distributed in the cutting area 72 are arranged in the same layer and made of the same material as the isolation column 30. Specifically, the routing segments 61 distributed in the cutting area 72 can be prepared at the same time as the isolation column 30. In this case, the routing segments 61 and the isolation column 30 are arranged in the same layer and made of the same material, thereby improving the preparation efficiency.

[0043] In one embodiment, the routing segments 61 distributed in the second hole area 73 are arranged in the same layer and made of the same material as the isolation column 30. Specifically, the routing segments 61 distributed in the second hole area 73 can be prepared at the same time as the isolation column 30. In this case, the routing segments 61 and the isolation column 30 are arranged in the same layer and made of the same material, thereby improving the preparation efficiency.

[0044] See also Figure 7The display panel 10 further includes a blocking wall 80, which is disposed between the isolation column 30 and the protective column 40. Specifically, the blocking wall 80 is disposed between the isolation column 30 and the protective column 40. When metal is deposited on the surface of the protective column 40, the design of the blocking wall 80 can prevent the metal from falling on the surface of the isolation column 30, thereby further improving the yield of the display panel 10.

[0045] In one embodiment, the isolation column 30, the protection column 40 and the blocking wall 80 all include an annular structure. Specifically, the isolation column 30, the protection column 40 and the blocking wall 80 are all designed around the opening area 11. The annular design has a compact structure and ensures the protection effect of the main screen area 13 of the display panel 10.

[0046] See also Figure 5 and Figure 7 The display panel 10 further includes an organic layer 90, which is disposed on the surface of the protective column 40 on the side away from the substrate 20. Specifically, the organic layer 90 is disposed on the surface of the protective column 40 on the side away from the substrate 20, so that the elemental metal deposited on the surface of the protective column 40 after reduction cannot overflow and is covered by the organic layer 90, thereby improving the yield of the display panel 10.

[0047] See also Figure 8 The isolation column 30 further includes a second isolation layer 32 and a third isolation layer 33. The second isolation layer 32, the first isolation layer 31 and the third isolation layer 33 are stacked in sequence in a direction away from the substrate 20. Specifically, the isolation column 30 includes a three-layer structure, and the isolation effect is better through the combination of the three-layer structure.

[0048] In one embodiment, the second isolation layer 32 and the third isolation layer 33 are made of the same material. Specifically, when the second isolation layer 32 and the third isolation layer 33 are made of the same material, it is easy to prepare and the preparation efficiency can be improved. Of course, in other embodiments, the second isolation layer 32 and the third isolation layer 33 may also be made of different materials.

[0049] In one embodiment, the material of the second isolation layer 32 and the third isolation layer 33 includes titanium. Specifically, titanium material is easy to obtain, which is conducive to the preparation of the second isolation layer 32 and the third isolation layer 33. Of course, in other embodiments, the material of the second isolation layer 32 and the third isolation layer 33 may also include other materials.

[0050] Please continue reading Figure 8 The protective column 40 further includes a second protective layer 42 and a third protective layer 43, and the second protective layer 42, the first protective layer 41 and the third protective layer 43 are stacked in a direction away from the substrate 20. Specifically, the protective column 40 has a better application effect by combining the second protective layer 42, the first protective layer 41 and the third protective layer 43.

[0051] In one embodiment, the second protective layer 42 and the third protective layer 43 are made of the same material. Specifically, when the second protective layer 42 and the third protective layer 43 are made of the same material, it is easy to prepare and the preparation efficiency can be improved. Of course, in other embodiments, the second protective layer 42 and the third protective layer 43 may also be made of different materials.

[0052] In one embodiment, the material of the second protective layer 42 and the third protective layer 43 includes indium tin oxide ITO. Specifically, ITO material is easy to obtain, which is conducive to the preparation of the second protective layer 42 and the third protective layer 43. Of course, in other embodiments, the material of the second protective layer 42 and the third protective layer 43 may also include other materials.

[0053] See also Fig. 9 The present application also provides a method for preparing a display panel 10, wherein the display panel 10 includes an isolation area 12 and a main screen area 13 located outside the isolation area 12, and the isolation area 12 also includes an opening area 11; the preparation method includes:

[0054] S10: An isolation column 30 and a protective column 40 are formed on one side of the substrate 20, wherein the isolation column 30 and the protective column 40 are both located in the isolation region 12, and the isolation column 30 includes a first isolation layer 31, the material of the first isolation layer 31 includes a first material, the protective column 40 includes a first protective layer 41, the material of the first protective layer 41 includes a second material, the first protective layer 41 is electrically connected to the first isolation layer 31, and the metal activity of the first material is stronger than the metal activity of the second material.

[0055] Specifically, an isolation column 30 and a protective column 40 are prepared on one side of the substrate 20, and the substrate 20 plays a supporting role. The isolation column 30 includes a first isolation layer 31 made of a first material, and the protective column 40 includes a first protective layer 41 made of a second material. The metal activity of the first material is stronger than the metal activity of the second material, and the two are electrically connected, so that a galvanic cell structure is formed between the protective column 40 and the isolation column 30, and the protective column 40 is the positive electrode of the galvanic cell, and the isolation column 30 is the negative electrode of the galvanic cell. During the preparation process of the display panel 10, the metal ions in the etching groove will be deposited on the surface of the protective column 40, and will not be deposited on the surface of the isolation column 30, thereby ensuring the yield of the display panel 10.

[0056] S20: digging a hole in the isolation area 12 to form an opening area 11.

[0057] Specifically, the opening area 11 is located at the center of the isolation area 12, and the center positions of the two are the same. A hole is dug in the center of the isolation area 12 to form the opening area 11, and the opening area 11 can be used to place a camera or a sensor.

[0058] The present application also provides a display device, which includes the display panel 10 described in the above embodiment. The display device in the embodiment of the present invention can be any product or component with display function, such as electronic paper, mobile phone, tablet computer, television, monitor, notebook computer, digital photo frame or navigator.

[0059] The above description is only an implementation method of the present application, and does not limit the patent scope of the present application. Any equivalent structure or equivalent process transformation made using the contents of the present application specification and drawings, or directly or indirectly used in other related technical fields, are also included in the patent protection scope of the present application.

Claims

1. A display panel, characterized in that: The display panel includes a display area, the display area includes an isolation area and a main screen area located outside the isolation area, and the display panel also includes: substrate; An isolation column, disposed at one side of the substrate and located in the isolation region, the isolation column comprising a first isolation layer, the material of the first isolation layer comprising a first material; A protective column is arranged on the same side of the substrate as the isolation column and is located in the isolation area, the protective column includes a first protective layer, the material of the first protective layer includes a second material, wherein the first protective layer is electrically connected to the first isolation layer, and the metal activity of the first material is stronger than the metal activity of the second material.

2. The display panel according to claim 1, characterized in that: The display panel comprises: a light-emitting layer, arranged on one side of the substrate, comprising a light-emitting element located in the main screen area, wherein the light-emitting element comprises a first electrode, a light-emitting material layer and a second electrode arranged in sequence in a direction away from the substrate, wherein the protection column is arranged in the same layer as the first electrode; Preferably, the protective column is made of the same material as the first electrode; Preferably, the protection column and the isolation column are arranged in the same layer; Preferably, the first material comprises aluminum, and the second material comprises silver.

3. The display panel according to claim 1 or 2, characterized in that: The number of the isolation columns is multiple, and the multiple isolation columns are arranged in concentric rings. The display panel further includes: Connecting wires to electrically connect the first isolation layer and the first protection layer of the plurality of isolation columns; Wherein, a plurality of the isolation columns are arranged around the protection column, or the protection column is arranged around a plurality of the isolation columns; Preferably, the connecting line is a continuous line arranged on the same side of the isolation column and the protection column, and the orthographic projection of the connecting line on the substrate intersects with the orthographic projection of the isolation column on the substrate and the orthographic projection of the protection column on the substrate; Preferably, the material of the connecting wire includes molybdenum.

4. The display panel according to claim 3, characterized in that: The connecting wiring includes a plurality of wiring segments, the first isolation layers in two adjacent isolation columns are electrically connected through one of the wiring segments, and the protection column and the adjacent isolation column are also electrically connected through one of the wiring segments; Preferably, at least some of the adjacent routing segments are staggered.

5. The display panel according to claim 4, characterized in that: The isolation area in the display panel further includes an opening area, the opening area includes a first hole area, a cutting area surrounding the first hole area, and a second hole area surrounding the cutting area, and a plurality of isolation columns are distributed in the first hole area, the cutting area, and the second hole area; The routing segments distributed in the first hole area are all located on the same side of the isolation column and the protection column, and the routing segments distributed in the first hole area are continuous and uninterrupted; and / or, the routing segments distributed in the cutting area are arranged in a staggered manner, And / or, the routing segments distributed in the second hole area are staggered; Preferably, the material of the routing segments distributed in the first hole area includes molybdenum; Preferably, the routing segments distributed in the cutting area are arranged in the same layer as the isolation columns and are made of the same material; Preferably, the routing segments distributed in the second hole region are arranged in the same layer as the isolation columns and are made of the same material.

6. The display panel according to claim 1, characterized in that: The display panel further comprises: A blocking wall is arranged between the isolation column and the protection column; Preferably, the isolation column, the protection column and the blocking wall all comprise annular structures.

7. The display panel according to claim 1, characterized in that: The display panel further comprises: The organic layer is arranged on the surface of the protection column which is away from the substrate.

8. The display panel according to claim 1, characterized in that: The isolation column further includes a second isolation layer and a third isolation layer, wherein the second isolation layer, the first isolation layer and the third isolation layer are stacked in sequence in a direction away from the substrate; Preferably, the second isolation layer and the third isolation layer are made of the same material; Preferably, the material of the second isolation layer and the third isolation layer includes titanium; And / or, the protective column further comprises a second protective layer and a third protective layer, and the second protective layer, the first protective layer and the third protective layer are stacked in a direction away from the substrate; Preferably, the second protective layer and the third protective layer are made of the same material; Preferably, the material of the second protective layer and the third protective layer includes ITO.

9. A method for preparing a display panel, characterized in that: The display panel includes an isolation area and a main screen area located outside the isolation area, and the isolation area also includes an opening area; the preparation method includes: An isolation column and a protection column are formed on one side of the substrate, wherein the isolation column and the protection column are both located in the isolation region, and the isolation column includes a first isolation layer, the material of the first isolation layer includes a first material, the protection column includes a first protection layer, the material of the first protection layer includes a second material, the first protection layer is electrically connected to the first isolation layer, and the metal activity of the first material is stronger than the metal activity of the second material; A hole is dug in the isolation area to form an open area.

10. A display device, characterized in that: The display device comprises a display panel, and the display panel is manufactured by the manufacturing method according to claim 9.

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