Display panel, manufacturing method and display device

Abstract

The present application discloses a display panel, a preparation method and a display device, which relate to the field of display technology, and can improve the problem that the setting of the existing metal isolation column easily causes electrochemical corrosion of the hole-dug OLED display panel, thereby causing the failure of the packaging film layer, and can improve the reliability of the display panel. The display panel includes: a non-display area, the non-display area includes an opening area and an isolation area, the isolation area surrounds the opening area; the isolation area includes at least one isolation groove, the isolation groove is used to block the electrical connection of the conductive layer and isolate the packaging layer.

Description

Technical Field

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

[0002] With the introduction of the concept of high screen-to-body ratio, OLED (Organic Light-Emitting Diode) display panel hole design products have become the mainstream of current mobile phone screens. However, moisture from the external environment will enter the display panel along the cut section formed by the opening or slot of the OLED display panel, which can easily cause display failure. At present, in order to solve the problem of moisture intrusion, isolation columns are usually set to block the moisture intrusion channel from the external environment.

[0003] However, the provision of metal isolation columns can easily lead to electrochemical corrosion of the hole-punched OLED display panel, thereby causing failure of the encapsulation film layer and reducing the reliability of the display panel. Summary of the invention

[0004] The embodiments of the present application provide a display panel, a preparation method and a display device, which can improve the problem that the setting of the existing metal isolation columns easily causes electrochemical corrosion of the hole-punched OLED display panel, thereby causing failure of the packaging film layer, and can improve the reliability of the display panel.

[0005] According to a first aspect of an embodiment of the present application, a display panel is provided, comprising:

[0006] a non-display area, the non-display area comprising an opening area and an isolation area, the isolation area surrounding the opening area;

[0007] The isolation region includes at least one isolation groove, and the isolation groove is used to block the electrical connection of the conductive layer and isolate the packaging layer.

[0008] In some embodiments, the display panel includes a substrate layer, and the conductive layer is disposed between the substrate layer and the encapsulation layer;

[0009] The conductive layer includes a light-emitting layer and a cathode layer. The light-emitting layer is arranged between the substrate layer and the cathode layer. The cathode layer is used to access a fixed potential.

[0010] In some embodiments, the display panel further includes:

[0011] a display area, the display area surrounding the non-display area, the conductive layer being disposed in the display area;

[0012] The conductive layer is not disposed in the isolation region.

[0013] In some embodiments, the encapsulation layer in the display area includes a first inorganic layer, an organic layer, and a second inorganic layer, and the organic layer is disposed between the first inorganic layer and the second inorganic layer;

[0014] The encapsulation layer in the isolation region includes the first inorganic layer and the second inorganic layer, the first inorganic layer is arranged between the substrate layer and the second inorganic layer, the organic layer is not arranged in the isolation region, and the first inorganic layer and the second inorganic layer in the isolation region are separated by the isolation groove.

[0015] In some embodiments, an isolation column is disposed in the display area and / or the isolation area, the isolation column is disposed between the substrate layer and the encapsulation layer, and the isolation column is used to isolate the conductive layer.

[0016] In some embodiments, a boundary defining structure is provided between the display area and the isolation area;

[0017] In the case where the isolation column is provided in the isolation region, the partition groove is provided between the boundary defining structure and the isolation column; and / or,

[0018] When the number of the isolation pillars in the isolation region is at least two, the partition groove is provided between any two of the isolation pillars; and / or,

[0019] The orthographic projection of the partition groove on the substrate layer at least partially overlaps with the orthographic projection of the isolation column on the substrate layer; and / or,

[0020] The partition groove is arranged on a side of the isolation column away from the boundary defining structure.

[0021] In some embodiments, the display panel further includes a signal electrode, and the isolation column and the signal electrode are manufactured through the same process.

[0022] In some embodiments, the isolation column includes a first electrode layer, a second electrode layer, and a third electrode layer, the second electrode layer is disposed between the first electrode layer and the third electrode layer, and a material of the second electrode layer includes aluminum.

[0023] In some embodiments, the isolation region further includes a metal layer, and the metal layer is disposed on a side of the packaging layer away from the substrate layer.

[0024] In some embodiments, the display panel further includes a touch electrode, which is disposed on a side of the encapsulation layer away from the substrate layer, and the metal layer and the touch electrode are manufactured through the same process.

[0025] In some embodiments, the isolation region further includes an inorganic insulating layer, the inorganic insulating layer is disposed on a side of the encapsulation layer away from the substrate layer, and the inorganic insulation covers the isolation trench.

[0026] A second aspect of the embodiments of the present application provides a method for preparing a display panel, which is used to prepare the display panel according to the first aspect, and the preparation method includes:

[0027] Providing a conductive layer and a packaging layer;

[0028] At least one isolation groove is set in the isolation area, so that the isolation groove blocks the electrical connection of the conductive layer and isolates the encapsulation layer to obtain a display panel, wherein the display panel includes a non-display area, the non-display area includes an opening area and the isolation area, and the isolation area surrounds the opening area.

[0029] In some embodiments, providing at least one partitioning groove in the isolation region so that the partitioning groove blocks the electrical connection of the conductive layer and partitions the encapsulation layer to obtain a display panel includes:

[0030] The encapsulation layer and the conductive layer are sequentially etched to form at least one partition groove in the isolation region to obtain the display panel.

[0031] According to a third aspect of the embodiments of the present application, a display device is provided, including:

[0032] A display panel as described in the first aspect.

[0033] The display panel, preparation method and display device provided by the embodiments of the present application, by setting at least one partition groove in the isolation area, the partition groove blocks the electrical connection of the conductive layer, so that the conductive layer of the opening section of the opening area of ​​the display panel will not be connected to the electrical signal, and will not generate an electric field, so that electrochemical corrosion with certain substances in the polarizer can be avoided, and packaging defects or packaging failures can be further avoided, which can improve the yield and reliability of the display panel. The partition groove isolates the encapsulation layer, which can prevent the encapsulation layer in the isolation area from forming an invasion channel for water and oxygen, and can prevent the light-emitting device in the display area from being corroded by water and oxygen. The area outside the partition groove still retains the encapsulation layer, which can ensure the adhesion of the film layers on both sides of the encapsulation layer and avoid the problem of film peeling. BRIEF DESCRIPTION OF THE DRAWINGS

[0034] Figure 1 A schematic diagram of the structure of a display panel provided in an embodiment of the present application;

[0035] Figure 2 A schematic diagram of the structure of another display panel provided in an embodiment of the present application;

[0036] Figure 3 A schematic cross-sectional view of a display panel along line BB′ provided in an embodiment of the present application;

[0037] Figure 4 A partial cross-sectional schematic diagram of another display panel along BB′ provided in an embodiment of the present application;

[0038] Figure 5 A schematic diagram of a partial structure of another display panel provided in an embodiment of the present application;

[0039] Figure 6 A schematic flow chart of a method for preparing a display panel provided in an embodiment of the present application;

[0040] Figure 7 A schematic diagram of the structure of a display device provided in an embodiment of the present application. DETAILED DESCRIPTION

[0041] In order to better understand the technical solutions provided by the embodiments of this specification, the technical solutions of the embodiments of this specification are described in detail below through the accompanying drawings and specific embodiments. It should be understood that the embodiments of this specification and the specific features in the embodiments are detailed descriptions of the technical solutions of the embodiments of this specification, rather than limitations on the technical solutions of this specification. In the absence of conflict, the embodiments of this specification and the technical features in the embodiments can be combined with each other.

[0042] In this article, relational terms such as first and second, etc. are only used to distinguish one entity or operation from another entity or operation, and do not necessarily require or imply that there is any such actual relationship or order between these entities or operations. Moreover, the terms "include", "comprise" or any other variants thereof are intended to cover non-exclusive inclusion, so that the process, method, article or equipment including a series of elements includes not only those elements, but also includes other elements not explicitly listed, or also includes elements inherent to such process, method, article or equipment. In the absence of more restrictions, the elements limited by the statement "comprise one..." do not exclude the existence of other identical elements in the process, method, article or equipment including the elements. The term "more than two" includes two or more than two situations.

[0043] With the introduction of the concept of high screen-to-body ratio, OLED display panel hole-design products have become the mainstream of current mobile phone screens. However, moisture in the external environment will enter the display panel along the cut section formed by the opening or slot of the OLED display panel, which can easily lead to display failure. At present, in order to solve the problem of moisture intrusion, isolation columns are usually set to block the moisture intrusion channel from the external environment. However, the setting of isolation columns can easily lead to the failure of the encapsulation film layer of the OLED display panel, reducing the reliability of the display panel.

[0044] In view of this, the embodiments of the present application provide a display panel, a preparation method and a display device, which can improve the problem that the setting of the existing metal isolation columns easily causes electrochemical corrosion of the hole-punched OLED display panel, thereby causing failure of the packaging film layer, and can improve the reliability of the display panel.

[0045] According to a first aspect of an embodiment of the present application, a display panel is provided. Figure 1 A partial structural diagram of a display panel provided in an embodiment of the present application. Figure 1 As shown, the display panel provided in the embodiment of the present application includes: a non-display area NA, the non-display area NA includes an opening area NA1 and an isolation area NA2, and the isolation area NA2 surrounds the opening area NA1. Figure 1 As shown, the isolation region NA2 may completely surround the opening region NA1. Figure 2 This is a schematic diagram of the structure of another display panel provided in an embodiment of the present application. Figure 2 As shown, the isolation area NA2 may partially surround the opening area NA1, and may be set according to the functional requirements of the non-display area NA, which is not specifically limited in the embodiments of the present application. It should be noted that the opening area NA1 may be a hollow area formed by cutting the corresponding position of the display panel, and the opening area NA1 may be used to avoid the camera on the display device, avoid the lighting device, or avoid other functional devices, etc., which is not specifically limited in the embodiments of the present application. The display panel also includes a display area AA, and the isolation area NA2 is arranged between the display area AA and the opening area NA1, and the isolation area NA2 is used to play a transition role.

[0046] Figure 3 FIG. 1 is a schematic cross-sectional view of a display panel along line BB′ provided in an embodiment of the present application. Figure 3As shown, the isolation region NA2 includes at least one partition groove 100, and the partition groove 100 is used to block the electrical connection of the conductive layer 200. It should be noted that in order to achieve the partition groove 100 to block the electrical connection of the conductive layer 200 and to isolate the encapsulation layer 400, the conductive layer 200 and the encapsulation layer 400 in the partition groove 100 can be etched away by etching, or the conductive layer 200 and the encapsulation layer 400 at the corresponding position can be etched away to form the partition groove 100. The conductive layer 200 is disconnected, that is, the conductive layer 200 is cut off. Usually, the film layer below the conductive layer 200 in the isolation region NA2 is an insulating film layer. Therefore, the conductive layer 200 can be electrically blocked by etching. The encapsulation layer 400 is cut off, that is, the encapsulation layer 400 is cut off. The film layer below the conductive layer 200 of the isolation area NA2 can also be etched to obtain a partition groove, and the interior of the partition groove of the film layer can be uneven, so that the conductive layer 200 is discontinuous on the inner wall after being covered, and the electrical connection of the conductive layer 200 can also be blocked. The electrical connection of the conductive layer 200 can also be blocked by other means, which is not specifically limited in the embodiments of the present application.

[0047] In the prior art, the conductive layer 200 is usually a conductive film layer disposed on the entire surface of the display panel. After the opening area NA1 of the display panel is cut to obtain an opening, the conductive layer 200 of the cut section of the opening of the display panel is exposed. Due to the water absorption characteristics of the conductive layer 200 material, water vapor from the external environment will invade the interior of the display panel through the cut section of the conductive layer 200, causing display function failure, reduced reliability of the display panel, and other problems. In order to solve the problem of water vapor intrusion in the prior art, an isolation column is usually provided, and the isolation column can isolate the conductive layer and block the invasion channel of water vapor. However, usually due to space limitations and the need to ensure the isolation effect, the isolation column needs to be prepared by metal material, and the metal film layer is etched to obtain the isolation column. The boundary of the isolation column obtained by etching is clear, and no arc connection will be formed between the isolation columns. It should be noted that the arc connection will cause the conductive layer to be unable to break at the edge of the isolation column after covering the isolation column, making it difficult to block the water vapor invasion channel. Therefore, although the conductive layer is broken on the side of the isolation column, the broken conductive layer will overlap the side of the isolation column. Since the isolation column is made of metal material, the conductive layer is energized, and the broken conductive layer can still form an electrical connection through the isolation column. A polarizer will be attached to the light-emitting side of the display panel. After the conductive layer is energized, under the action of the electric field, certain chemical substances in the polarizer will react chemically with the cut section of the conductive layer to form electrochemical corrosion. The electrochemical corrosion will further corrode the packaging material, causing poor packaging or packaging failure, greatly reducing the reliability and yield of the display panel. In view of the problems existing in the prior art, the display panel provided by the embodiment of the present application, by setting at least one partition groove 100 in the isolation area NA2, the partition groove 100 blocks the electrical connection of the conductive layer 200, so that the conductive layer 200 of the opening section of the opening area NA1 of the display panel will not be connected to the electrical signal, and will not generate an electric field, so that electrochemical corrosion with certain substances in the polarizer can be avoided, and poor packaging or packaging failure can be further avoided, which can improve the yield and reliability of the display panel.

[0048] Continue to refer Figure 4 The encapsulation layer 400 is mainly used to protect the conductive layer 200. Since the conductive layer 200 easily absorbs water and conducts water oxygen, the encapsulation layer 400 can protect the conductive layer 200 from being corroded by the external environment. The encapsulation layer 400 is usually arranged on the entire surface of the display panel. The encapsulation layer 400 is separated by the partition groove 100. The encapsulation layer 400 in the partition groove 100 can be etched away by an etching process to achieve the partition groove 100 separating the encapsulation layer 400.

[0049] The display panel provided in the embodiment of the present application is provided with at least one partition groove 100 in the isolation area NA2. The partition groove 100 blocks the electrical connection of the conductive layer 200. Then, the conductive layer 200 in the opening section of the opening area NA1 of the display panel will not be connected to the electrical signal, and will not generate an electric field. This can avoid electrochemical corrosion with certain substances in the polarizer, further avoid poor packaging or packaging failure, and improve the yield and reliability of the display panel. The partition groove 100 isolates the encapsulation layer 400, which can prevent the encapsulation layer 400 in the isolation area NA2 from forming an invasion channel for water and oxygen, and can prevent the light-emitting device in the display area AA from being corroded by water and oxygen. The area outside the partition groove 100 still retains the encapsulation layer 400, which can ensure the adhesion of the film layers on both sides of the encapsulation layer 400 and avoid the problem of film peeling.

[0050] In some embodiments, continue to refer to Figure 3 , the display panel includes a substrate layer 300, and the conductive layer 200 is arranged between the substrate layer 300 and the encapsulation layer 400; the conductive layer 200 includes a light-emitting layer and a cathode layer, the light-emitting layer is arranged between the substrate layer and the cathode layer, and the cathode layer is used to access a fixed potential. Usually, a light-emitting layer needs to be arranged in an organic light-emitting display panel, and an anode and a cathode need to be arranged on both sides of the light-emitting layer. After the anode and the cathode are energized, they can drive the light-emitting layer to emit light to realize the picture display. The light-emitting layer usually also includes a hole generation layer, a hole transport layer, an electron transport layer and an electron generation layer. There are conductive particles (electrons or holes) in the light-emitting material, so the light-emitting layer can also be regarded as a conductive material. The material property of the light-emitting layer is that it is easy to conduct water vapor, which can be understood as the material of the light-emitting layer has a water absorption property. The light-emitting layer is usually arranged on the entire surface of the display panel, so the light-emitting layer on the cut section formed after the opening area NA1 is set is easy to become an invasion channel for water vapor. The cathode is usually arranged on the entire surface of the display panel, and the cathode arranged on the entire surface forms a cathode layer. The rated potential connected to the cathode layer can be a low level, for example, -5V to -3V, which is not specifically limited in the embodiment of the present application. It should be noted that, Figure 3 The opening area NA1 is not shown. Figure 3 It is only for illustration and is not intended to be a specific limitation of the embodiments of the present application.

[0051] The display panel provided in the embodiment of the present application has a partition groove 100 arranged in the isolation area NA2, and the isolation area NA2 belongs to the non-display area NA. The partition groove 100 blocks the electrical connection of the conductive layer 200, that is, the blocking of the electrical connection of the conductive layer in the non-display area NA will not affect the display of the display area AA, and can also block the electrical connection of the conductive layer 200 in the isolation area NA2, thereby preventing the substance in the polarizer from chemically reacting with the conductive layer 200 under the electric field formed by the continuously electrically connected conductive layer 200 to form electrochemical corrosion, further preventing the packaging material from being corroded, resulting in poor packaging or failure. The provision of the partition groove 100 can improve the reliability of the display panel.

[0052] In some embodiments, continue to refer to Figure 3 , combined with Figure 1 and Figure 3 The display panel provided in the embodiment of the present application further includes: a display area AA, the display area AA surrounds the non-display area NA, such as Figure 1 As shown, the display area AA may completely surround the non-display area NA. Figure 2 As shown, the display area AA may partially surround the non-display area NA, which is not specifically limited in the present embodiment of the application. Figure 3 , the conductive layer 200 is arranged between the substrate layer 300 and the encapsulation layer 400; the substrate layer 300 can be a glass substrate or a flexible substrate, which is not specifically limited in this application. The encapsulation layer 400 is mainly used to protect the light-emitting device formed by the light-emitting layer, the cathode layer and the anode. Due to the material characteristics of the light-emitting layer, it is easy to react with water and oxygen to cause light-emitting failure. Therefore, the encapsulation layer 400 can protect the light-emitting device from being corroded by the external environment. The encapsulation layer 400 is usually arranged on the entire surface of the display panel. The encapsulation layer 400 is separated by the partition groove 100. The encapsulation layer 400 in the partition groove 100 can be etched away by an etching process to achieve the partition groove 100 to separate the encapsulation layer 400.

[0053] In some embodiments, a conductive layer 200 is provided in the display area AA, and no conductive layer 200 is provided in the isolation area NA2. The conductive layer 200 in the isolation area NA2 can be completely removed, which can be achieved by etching or other methods, so that the material in the polarizer will not contact the conductive layer 200, and electrochemical corrosion will not occur, which can avoid corrosion of the encapsulation layer 400 and improve the reliability of the display panel.

[0054] For example, in order to ensure the packaging reliability of the organic light-emitting display panel, a variety of packaging solutions can be adopted, usually using isolation columns to isolate the conductive layer. However, since the isolation columns usually have good conductivity, the isolated conductive layers can be electrically connected, making the isolation area NA2 a negative electrode, which can cause electrochemical corrosion of the isolation area NA2 under certain conditions, thereby causing the packaging layer to fail and causing poor packaging. The display panel provided in the embodiment of the present application is provided with a partition groove 100 to block the electrical connection of the conductive layer 200, which can further enhance the packaging reliability of the isolation area NA2.

[0055] In some embodiments, Figure 4 FIG. 1 is a partial cross-sectional diagram of another display panel along the BB′ line provided in an embodiment of the present application. Figure 4 As shown, the encapsulation layer 400 in the display area AA includes a first inorganic layer 410, an organic layer 420 and a second inorganic layer 430, and the organic layer 420 is arranged between the first inorganic layer 410 and the second inorganic layer 430; the encapsulation layer 400 in the isolation area NA2 includes a first inorganic layer 410 and a second inorganic layer 430, and the first inorganic layer 410 is arranged between the substrate layer 300 and the second inorganic layer 430, and the organic layer 420 is not arranged in the isolation area NA2, and the first inorganic layer 410 and the second inorganic layer 430 in the isolation area NA2 are separated by the separation groove 100. Since the first inorganic layer 410 and the second inorganic layer 430 can be prepared by chemical vapor deposition, the organic layer 420 can be prepared by ink printing, and the organic layer 420 has strong water absorption, the organic layer 420 is not arranged in the isolation area NA2, which can avoid the organic layer 420 in the isolation area NA2 from forming a water-oxygen channel on the cut section, causing encapsulation failure, and can improve the reliability of the display panel.

[0056] It should be noted that the display area AA is also provided with structures such as driving devices and light emitting devices. Due to limited space, Figure 4 Other film layers may be disposed between the substrate layer 300 and the isolation column 500 , which are not listed one by one in the embodiment of the present application.

[0057] In some embodiments, an isolation column is provided in the display area AA and / or the isolation area NA2, and the isolation column is provided between the substrate layer 300 and the encapsulation layer 400, and the isolation column is used to isolate the conductive layer 200. The isolation column can be provided only in the display area AA, or only in the isolation area NA2, or both in the isolation area NA2 and in the display area AA. The number of isolation columns and the number of isolation grooves 100 are not specifically limited in this application. The dual barrier of the isolation column and the isolation groove 100 for the conductive layer 200 can completely disconnect the invasion channel of water and oxygen, and block the electrical connection of the conductive layer 200 between the display area AA and the isolation area NA2, avoiding electrochemical corrosion, and further avoiding affecting the packaging effect and the reliability of the display panel.

[0058] In some embodiments, a boundary defining structure is provided between the display area AA and the isolation area NA2. The boundary defining structure may be formed by stacking a plurality of film layers. The boundary defining structure may be used to define the boundary between the display area AA and the isolation area NA2, and may prevent the material of the organic layer 420 from extending into the isolation area NA2 during the preparation of the organic layer 420 by the ink printing process. The number of isolation columns may be one, two or more, and the number of partition grooves 100 may be one, two or more. In the case where an isolation column is provided in the isolation area NA2, the partition groove 100 may be provided between the boundary defining structure and the isolation column. In the case where the number of isolation columns in the isolation area NA2 is at least two, the partition groove may be provided between any two isolation columns. The orthographic projections of a part or all of the partition grooves 100 on the substrate layer 300 at least partially overlap with the orthographic projections of the isolation columns on the substrate layer 300. The partition groove 100 may also be provided on the side of the isolation column away from the boundary defining structure, that is, the isolation groove is provided at the edge of one side of the isolation area NA2 close to the opening area NA1. The isolation column is arranged in the display area AA, which can form the last line of defense for isolating water vapor at the boundary of the display area AA, thereby enhancing the effect of isolating water vapor and fully ensuring that the display area is not affected by the invasion of water vapor.

[0059] For example, continue to refer to Figure 4 Isolation columns 500 are disposed in both the isolation area NA2 and the display area AA, and a boundary defining structure 600 is disposed between the display area AA and the isolation area NA2. Figure 4 The number of isolation columns 500 and the number of partition grooves 100 shown are only schematic. An insulating layer PLN and a pixel defining layer PDL are sequentially arranged between the substrate layer 300 and the conductive layer 200. The pixel defining layer PDL is used to define the boundary of the pixel. The boundary defining structure 600 is formed based on the stacking of the pixel defining layer PDL and the subsequent encapsulation layer 400. An inorganic insulating layer 700 and a top protective layer 800 are sequentially arranged on the side of the encapsulation layer 400 away from the substrate layer 300.

[0060] Continue to refer Figure 4 The partitioning groove 100 in the isolation area NA2 may include a first partitioning groove 110, a second partitioning groove 120 and a third partitioning groove 130, and the first partitioning groove 110 is disposed between the boundary defining structure 600 and the isolation column 500. The first partitioning groove 110 blocks the electrical connection of the conductive layer 200 between the boundary defining structure 600 and the isolation column 500, which can effectively block the electrical connection of the conductive layer 200 and avoid electrochemical corrosion.

[0061] Continue to refer Figure 4 , the second partition groove 120 is arranged above the isolation column 500, that is, the orthographic projection of the second partition groove 120 on the substrate layer 300 covers the orthographic projection of the isolation column 500 on the substrate layer 300; the orthographic projection of the third partition groove 130 on the substrate layer 300 covers the orthographic projection of the isolation column 500 on the substrate layer 300, and the projection coverage can be full coverage or partial coverage. It can also be understood that the orthographic projection of the second partition groove 120 on the substrate layer 300 and the orthographic projection of the isolation column 500 on the substrate layer 300 are at least partially overlapped; the orthographic projection of the third partition groove 130 on the substrate layer 300 and the orthographic projection of the isolation column 500 on the substrate layer 300 are at least partially overlapped, and the isolation column 500 can be formed before the partition groove 100, so the partition groove 100 can be arranged above the isolation column 500, which can save the layout space of the partition groove 100 and the isolation column 500, and more partition grooves 100 and more isolation columns 500 can be arranged in a limited space. The stacking arrangement of the partition groove 100 and the isolation column 500 can further enhance the electrical connection blocking effect of the conductive layer 200 .

[0062] In some embodiments, the display panel also includes a signal electrode, and the isolation column 500 can be prepared by the same process as the signal electrode. The signal electrode can be used to access a data signal, and the signal electrode can also be used to access a fixed high level, which is not specifically limited in the embodiments of the present application. The isolation column 500 is prepared by the same process as the signal electrode, and there is no need to increase the process flow to set the isolation column, which does not affect the production efficiency of the display panel. It should be noted that the signal electrode can be prepared by the source and drain metal layer of the driving device of the display panel, that is, the signal electrode can be the source and drain electrode of the driving device, which is not specifically limited in the present application.

[0063] In some embodiments, the isolation column 500 includes a first electrode layer, a second electrode layer and a third electrode layer, the second electrode layer is arranged between the first electrode layer and the third electrode layer, and the material of the second electrode layer may include aluminum. The film structure of the isolation column 500 may be titanium-aluminum-titanium, molybdenum-aluminum-molybdenum, etc. The film structure of the isolation column 500 is the same as the film structure of the signal electrode, and the embodiment of the present application is not specifically limited. The conductive layer 200 is usually broken at the edge of the isolation column 500, and the broken end of the broken conductive layer 200 is usually overlapped on the second electrode layer, that is, it will overlap on the aluminum material. The conductivity requirements of the signal electrode are high, and the conductivity of the aluminum material is better, but the hardness of the aluminum material is low and the stability is insufficient. Titanium or molybdenum needs to be set on both sides of the aluminum to meet the hardness requirements and obtain better conductivity.

[0064] In some embodiments, the isolation area NA2 also includes a metal layer, and the metal layer is arranged on the side of the packaging layer 400 away from the substrate layer 300. Exemplarily, the display panel also includes a touch electrode, and the touch electrode is arranged on the side of the packaging layer 400 away from the substrate layer 300. The metal layer can be prepared by the same process as the touch electrode. The touch electrode usually includes two layers for realizing the touch function. The metal layer can be arranged in the same layer as any layer of the touch electrode, or the metal layer includes two layers of materials of the touch electrode. The preparation of the metal layer does not need to increase the process flow and does not affect the production efficiency. Although the isolation column 500 and the partition groove 100 can isolate the conductive layer 200, since the boundary between the isolation area NA2 and the opening area NA1 is a cutting section, cutting cracks are easily formed in the cutting process. The metal layer can cover the isolation area NA2. Compared with the isolation column, the metal layer has a better blocking effect on crack extension. The partition groove 100 can also block the crack from extending into the display area AA to a certain extent, which can prevent the crack from damaging the devices and circuits in the display area AA. Exemplarily, the metal layer may be made of titanium-aluminum-titanium, which is not specifically limited in the embodiments of the present application.

[0065] In some embodiments, the isolation area NA2 further includes an inorganic insulating layer 700, and the inorganic insulating layer 700 is disposed on the side of the encapsulation layer 400 away from the substrate layer 300. The inorganic insulating layer 700 can be disposed between the encapsulation layer 400 and the top protective layer 800, and the inorganic insulating layer 700 can cover the entire display panel. The inorganic insulating layer 700 can be used for insulation between two layers of touch electrodes, and the inorganic insulating layer 700 can cover the isolation groove 100. The inorganic insulating layer 700 can be a material such as silicon nitride, which is not specifically limited in the embodiments of the present application. The inorganic insulating layer 700 is an inorganic material that can prevent water vapor from invading and can also block crack expansion. The inorganic insulating layer 700 can be used together with a metal layer to block crack expansion, or only a metal layer can be set to block crack expansion, or only an inorganic insulating layer 700 can be set to block crack expansion, which is not specifically limited in the embodiments of the present application. The top protective layer 800 can be a film layer disposed on the display panel on the entire surface, which is used to flatten the display panel and protect the display panel.

[0066] For example, Figure 5 A partial structural diagram of another display panel provided in an embodiment of the present application. Figure 5 As shown, the first partition groove 110, the second partition groove 120, the third partition groove 130 and the fourth partition groove 140 are arranged in the isolation area, the first partition groove 110 is arranged between the isolation column 500 and the boundary defining structure 600, the orthographic projections of the second partition groove 120 and the third partition groove 130 on the substrate layer overlap with the orthographic projections of the corresponding isolation column 500 on the substrate layer, and the fourth partition groove 140 is arranged between the opening area NA1 and the isolation column 500. Figure 5 The size ratio of the opening area NA1 to the isolation area is only illustrative, and the sizes of the plurality of isolation pillars 500 may be different, and the sizes of the plurality of partition grooves 100 may also be different.

[0067] A second aspect of the embodiments of the present application provides a method for preparing a display panel, which is used to prepare the display panel as described in the first aspect. Figure 6 The following is a schematic flow chart of a method for manufacturing a display panel provided in an embodiment of the present application. Figure 6 As shown, the method for preparing a display panel provided in an embodiment of the present application includes:

[0068] S901: Provide a conductive layer and a packaging layer. The conductive layer may be provided on the entire surface, and the conductive layer may be used to access electrical signals, which is not specifically limited in the present embodiment.

[0069] S902: at least one partitioning groove is provided in the isolation area, so that the partitioning groove blocks the electrical connection of the conductive layer and isolates the encapsulation layer to obtain a display panel, wherein the display panel includes a non-display area, the non-display area includes an opening area and an isolation area, and the isolation area surrounds the opening area. Figure 1 , the isolation region NA2 may completely surround the opening region NA1. Figure 2 , the isolation area NA2 may partially surround the opening area NA1. It should be noted that the opening area NA1 may be a hollow area formed by cutting the corresponding position of the display panel, and the opening area NA1 may be used to avoid the camera on the display device, avoid the lighting device, or avoid other functional devices, etc., which is not specifically limited in this application. The display panel also includes a display area AA, and the isolation area NA2 is arranged between the display area AA and the opening area NA1, and the isolation area NA2 is used to play a transition role.

[0070] In the prior art, the conductive layer 200 is usually a conductive film layer disposed on the entire surface of the display panel. After the opening area NA1 of the display panel is cut to obtain an opening, the conductive layer 200 of the cut section of the opening of the display panel is exposed. Due to the water absorption characteristics of the conductive layer 200 material, water vapor from the external environment will invade the interior of the display panel through the cut section of the conductive layer 200, causing display function failure, reduced reliability of the display panel, and other problems. In order to solve the problem of water vapor intrusion in the prior art, an isolation column is usually provided, and the isolation column can isolate the conductive layer and block the invasion channel of water vapor. However, usually due to space limitations and the need to ensure the isolation effect, the isolation column needs to be prepared by metal material, and the metal film layer is etched to obtain the isolation column. The boundary of the isolation column obtained by etching is clear, and no arc connection will be formed between the isolation columns. It should be noted that the arc connection will cause the conductive layer to be unable to break at the edge of the isolation column after covering the isolation column, making it difficult to block the water vapor invasion channel. Therefore, although the conductive layer is broken on the side of the isolation column, the broken conductive layer will overlap the side of the isolation column. Since the isolation column is made of metal material, the conductive layer is energized, and the broken conductive layer can still form an electrical connection through the isolation column. A polarizer will be attached to the light-emitting side of the display panel. After the conductive layer is energized, under the action of the electric field, certain chemical substances in the polarizer will react chemically with the cut section of the conductive layer to form electrochemical corrosion. The electrochemical corrosion will further corrode the packaging material, causing poor packaging or packaging failure, greatly reducing the reliability and yield of the display panel. In view of the problems existing in the prior art, the display panel provided by the embodiment of the present application, by setting at least one partition groove 100 in the isolation area NA2, the partition groove 100 blocks the electrical connection of the conductive layer 200, so that the conductive layer 200 of the opening section of the opening area NA1 of the display panel will not be connected to the electrical signal, and will not generate an electric field, so that electrochemical corrosion with certain substances in the polarizer can be avoided, and poor packaging or packaging failure can be further avoided, which can improve the yield and reliability of the display panel.

[0071] Continue to refer Figure 4The encapsulation layer 400 is mainly used to protect the conductive layer 200. Since the conductive layer 200 easily absorbs water and conducts water oxygen, the encapsulation layer 400 can protect the conductive layer 200 from being corroded by the external environment. The encapsulation layer 400 is usually arranged on the entire surface of the display panel. The encapsulation layer 400 is separated by the partition groove 100. The encapsulation layer 400 in the partition groove 100 can be etched away by an etching process to achieve the partition groove 100 separating the encapsulation layer 400.

[0072] The method for preparing a display panel provided in an embodiment of the present application provides at least one partitioning groove 100 in the isolation area NA2, and the partitioning groove 100 blocks the electrical connection of the conductive layer 200. Then, the conductive layer 200 in the open section of the opening area NA1 of the display panel will not be connected to the electrical signal, and will not generate an electric field, thereby avoiding electrochemical corrosion with certain substances in the polarizer, further avoiding poor packaging or packaging failure, and improving the yield and reliability of the display panel. The partitioning groove isolates the encapsulation layer, which can prevent the encapsulation layer in the isolation area from forming an invasion channel for water and oxygen, and can prevent the light-emitting device in the display area from being corroded by water and oxygen. The area outside the partitioning groove still retains the encapsulation layer, which can ensure the adhesion of the film layers on both sides of the encapsulation layer and avoid the problem of film peeling.

[0073] In some implementations, step S902 may include:

[0074] The encapsulation layer and the conductive layer are sequentially etched to form at least one partition groove in the isolation region to obtain a display panel. Figure 3 In order to achieve the electrical connection blocking of the conductive layer 200 by the partition groove 100, the conductive layer 200 in the partition groove 100 can be etched away by etching to disconnect the conductive layer 200, that is, the conductive layer 200 is cut off. Usually, the film layer below the conductive layer 200 in the isolation area NA2 is an insulating film layer. Therefore, the electrical connection blocking of the conductive layer 200 can be achieved by etching. The film layer below the conductive layer 200 in the isolation area NA2 can also be etched to obtain a partition groove, and the interior of the partition groove of the film layer can be uneven, so that the conductive layer 200 is discontinuous on the inner wall after being covered, and the electrical connection blocking of the conductive layer 200 can also be achieved. The electrical connection blocking of the conductive layer 200 can also be achieved by other methods, which are not specifically limited in the embodiments of the present application.

[0075] According to a third aspect of the embodiments of the present application, a display device is provided. Figure 7 This is a schematic diagram of the structure of a display device provided in an embodiment of the present application. Figure 7As shown, the display device provided in the embodiment of the present application includes: the display panel 1000 as described in the first aspect. It should be noted that the display device provided in the embodiment of the present application may include a smart phone, a tablet computer, a laptop computer, a television set, and other displays, etc. The display device may also include a camera, a lighting device, or other functional devices, etc. The camera, the lighting device, or other functional devices, etc. may be arranged at a position corresponding to the opening area NA1 of the display panel 1000.

[0076] Although the preferred embodiments of this specification have been described, those skilled in the art may make additional changes and modifications to these embodiments once they have learned the basic creative concept. Therefore, the appended claims are intended to be interpreted as including the preferred embodiments and all changes and modifications that fall within the scope of this specification.

[0077] Obviously, those skilled in the art can make various changes and modifications to this specification without departing from the spirit and scope of this specification. Thus, if these modifications and variations of this specification fall within the scope of the claims of this specification and their equivalents, this specification is also intended to include these modifications and variations.

Claims

1. A display panel, characterized in that: include: a non-display area, the non-display area comprising an opening area and an isolation area, the isolation area surrounding the opening area; The isolation region includes at least one isolation groove, and the isolation groove is used to block the electrical connection of the conductive layer and isolate the packaging layer; The display panel comprises a substrate layer, and the conductive layer is arranged between the substrate layer and the encapsulation layer; The conductive layer includes a light-emitting layer and a cathode layer, the light-emitting layer is arranged between the substrate layer and the cathode layer, and the cathode layer is used to connect to a fixed potential; An isolation column is arranged in the display area and / or the isolation area, the isolation column is arranged between the substrate layer and the encapsulation layer, and the isolation column is used to isolate the conductive layer; The display panel further includes a signal electrode, and the isolation column and the signal electrode are prepared by the same process; The isolation column comprises a first electrode layer, a second electrode layer and a third electrode layer, the second electrode layer is arranged between the first electrode layer and the third electrode layer, and the material of the second electrode layer comprises aluminum; The isolation region also includes an inorganic insulating layer, which is arranged on a side of the encapsulation layer away from the substrate layer, and covers the partition groove.

2. The display panel according to claim 1, characterized in that: Also includes: a display area, the display area surrounding the non-display area, the conductive layer being disposed in the display area; The conductive layer is not disposed in the isolation region.

3. The display panel according to claim 1, characterized in that: The encapsulation layer in the display area includes a first inorganic layer, an organic layer, and a second inorganic layer, wherein the organic layer is disposed between the first inorganic layer and the second inorganic layer; The encapsulation layer in the isolation region includes the first inorganic layer and the second inorganic layer, the first inorganic layer is arranged between the substrate layer and the second inorganic layer, the organic layer is not arranged in the isolation region, and the first inorganic layer and the second inorganic layer in the isolation region are separated by the isolation groove.

4. The display panel according to claim 1, characterized in that: A boundary defining structure is provided between the display area and the isolation area; In the case where the isolation column is provided in the isolation region, the partition groove is provided between the boundary defining structure and the isolation column; and / or, When the number of the isolation pillars in the isolation region is at least two, the partition groove is provided between any two of the isolation pillars; and / or, The orthographic projection of the partition groove on the substrate layer at least partially overlaps with the orthographic projection of the isolation column on the substrate layer; and / or, The partition groove is arranged on a side of the isolation column away from the boundary defining structure.

5. The display panel according to claim 1, characterized in that: The isolation region also includes a metal layer, and the metal layer is arranged on a side of the packaging layer away from the substrate layer.

6. The display panel according to claim 5, characterized in that: The display panel further includes a touch electrode, which is disposed on a side of the packaging layer away from the substrate layer. The metal layer and the touch electrode are manufactured through the same process.

7. A method for preparing a display panel, characterized in that: Used to prepare a display panel according to any one of claims 1 to 6, the preparation method comprising: Providing a conductive layer and a packaging layer; At least one isolation groove is set in the isolation area, so that the isolation groove blocks the electrical connection of the conductive layer and isolates the encapsulation layer to obtain a display panel, wherein the display panel includes a non-display area, the non-display area includes an opening area and the isolation area, and the isolation area surrounds the opening area.

8. The method for preparing a display panel according to claim 7, characterized in that: The method of providing at least one partitioning groove in the isolation region so that the partitioning groove blocks the electrical connection of the conductive layer and partitions the encapsulation layer to obtain a display panel comprises: The encapsulation layer and the conductive layer are sequentially etched to form at least one partition groove in the isolation region to obtain the display panel.

9. A display device, characterized in that: include: A display panel as claimed in any one of claims 1 to 6.

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