Flexible display panel packaging structure, flexible display panel and display device

Abstract

The utility model provides a flexible display panel packaging structure, a flexible display panel and a display device, the flexible display panel packaging structure comprises an insulating layer and a contact hole layer which are arranged in a display area and a non-display area, a composite layer is arranged between the insulating layer and the contact hole layer, the composite layer comprises a metal layer and a first inorganic layer, the first inorganic layer is arranged on the side, away from the contact hole layer, of the metal layer, the contact hole layer and the composite layer are provided with first grooves formed in the contact hole layer and the composite layer to expose the first inorganic layer, the first inorganic layer is provided with at least one second groove, and the second grooves and the first grooves are matched to form physical isolation and protection on the flexible display panel. According to the utility model, the composite layer is arranged between the insulating layer and the contact hole layer and comprises the metal layer and the first inorganic layer, so that the overall strength and stability of the packaging structure are enhanced. The internally tangent groove arranged on the first inorganic layer can effectively reduce the stress of the film layer and reduce the risk of packaging failure.

Description

Technical Field

[0001] The utility model relates to the field of display panel structures, in particular to a flexible display panel packaging structure. Background Art

[0002] In the manufacturing process of flexible display panels, the design and implementation of the packaging structure is one of the key factors affecting the performance and reliability of the display panel. With the widespread application of organic electroluminescent display devices (OLED), flexible display panels have gradually become the mainstream of the market due to their superior display effects and bending characteristics. However, in the packaging process of flexible display panels, due to the complex packaging layer structure and large interlayer stress, packaging failure and film cracking are often caused, which directly affects the service life and display quality of the panel.

[0003] In the prior art, such as Figure 1 As shown, the packaging structure of the flexible display panel, especially the through-hole packaging structure of the flexible display panel, generally includes a multi-layer polyimide (PI) layer, an inorganic film layer (PI buffer), a contact hole (CT) layer and other functional layers. The difference in material properties between the polyimide (PI) layer and the inorganic film layer (PI buffer) is used to form an undercut structure to achieve a better packaging effect. However, there are some technical problems in the prior art. First, the packaging structure relies on the undercut stacking of the inorganic film layer (PI buffer) and the organic layer (PI), and only the first inorganic layer (such as silicon dioxide SiOx) deposited by the CVD1 and CVD2 processes is used to block water and oxygen. However, if cracks appear in the packaging layer, water and oxygen can easily invade, causing packaging failure. Secondly, the problem of disconnection of the OLED layer in a fixed area. The existing packaging structure prevents the OLED layer from reacting with water and oxygen in the air and failing by disconnecting the OLED layer in a fixed area. However, this structural design will lead to a decrease in the rigidity and toughness of the PI2 layer, making the upper film layer in this area more prone to cracking risks, further leading to packaging failure.

[0004] It should be noted that the information disclosed in the above background technology section is only used to enhance the understanding of the background of the utility model, and therefore may include information that does not constitute the prior art known to ordinary technicians in the field. Utility Model Content

[0005] In view of this, the utility model provides a flexible display panel packaging structure, which improves the reliability and durability of the packaging by optimizing the arrangement of film layers and the selection of materials.

[0006] One aspect of the utility model provides a flexible display panel packaging structure, including an insulating layer and a contact hole layer arranged in a display area and a non-display area, a composite layer is arranged between the insulating layer and the contact hole layer, the composite layer includes a metal layer and a first inorganic layer, the first inorganic layer is arranged on the side of the metal layer away from the contact hole layer, the contact hole layer and the composite layer have a first groove formed therein to expose the first inorganic layer, the first inorganic layer is provided with at least one second groove, the second groove cooperates with the first groove to form physical isolation and protection for the flexible display panel.

[0007] Furthermore, the first groove is located above the non-display area, and the first groove is a circular or polygonal hole, a slit or a groove.

[0008] Furthermore, the diameter of the second groove is larger than that of the first groove.

[0009] Furthermore, the composite layer is a storage capacitor layer, the metal layer is a molybdenum layer, and the first inorganic layer is a silicon nitride layer.

[0010] Furthermore, at least two isolation support structures are arranged on the contact hole layer, and the first groove and the second groove are arranged between the isolation support structures.

[0011] Furthermore, a gate layer is disposed on a side of the composite layer away from the contact hole layer.

[0012] Furthermore, a second inorganic layer is disposed on a side of the gate layer away from the contact hole layer.

[0013] Furthermore, a second inorganic buffer layer is disposed on a side of the second inorganic layer away from the contact hole layer.

[0014] Furthermore, a barrier layer is provided on the side of the second inorganic buffer layer away from the contact hole layer, and the insulating layer is located on the side of the barrier layer away from the contact hole layer.

[0015] Another aspect of the utility model further provides a flexible display panel, wherein the display panel is provided with a through hole, and the packaging structure around the through hole adopts the above-mentioned flexible display panel packaging structure.

[0016] Another aspect of the present invention further provides a display device, which includes the above-mentioned flexible display panel.

[0017] Compared with the prior art, the utility model has at least the following advantages:

[0018] Improve package reliability: By setting a composite layer between the insulating layer and the contact hole layer, including a metal layer and a first inorganic layer, the overall strength and stability of the package structure are enhanced. The inscribed grooves set in the first inorganic layer can effectively reduce the stress of the film layer and reduce the risk of package failure.

[0019] Enhanced crack resistance: The newly added film layer structure, including the metal layer (such as molybdenum layer) and the first inorganic layer (such as silicon nitride layer), is set at the position of the inscribed groove to have better crack resistance. This design can effectively avoid film layer cracking caused by interlayer stress and improve the durability of the package.

[0020] Simplified manufacturing process: By optimizing the hierarchical arrangement and material selection of the packaging structure, the manufacturing process is simplified. Specifically, in some embodiments, a gas mixture of carbon tetrafluoride and oxygen can be used to etch the inscribed groove, avoiding a complex multi-step etching process and reducing production costs and difficulty.

[0021] Enhanced protection effect: The structure formed by the inner groove and the first groove can provide better physical isolation and protection effect. This design not only improves the sealing of the package, but also effectively prevents the invasion of harmful substances such as water and oxygen, thereby extending the service life of the display panel.

[0022] Reduce the risk of water and oxygen intrusion: By optimizing the stacking design of the first inorganic layer and the organic layer, the crack problem that is prone to occur in the traditional packaging structure is overcome. The setting of the composite layer effectively isolates the intrusion path of water and oxygen, greatly reducing the probability of packaging failure.

[0023] Improved display quality: The improved packaging structure reduces the risk of film cracking and packaging failure, thereby maintaining the high-quality display effect of the OLED display panel. The stability and reliability of the packaging structure directly affect the performance of the display panel. The technical solution of this utility model ensures the stability and durability of the display quality.

[0024] It should be understood that the above general description and the following detailed description are exemplary and explanatory only and are not restrictive of the present invention. BRIEF DESCRIPTION OF THE DRAWINGS

[0025] The drawings herein are incorporated into the specification and constitute a part of the specification, showing embodiments consistent with the present utility model, and together with the specification, are used to explain the principles of the present utility model. Obviously, the drawings described below are only some embodiments of the present utility model, and for ordinary technicians in this field, other drawings can be obtained based on these drawings without creative work.

[0026] Figure 1 A schematic diagram of a packaging structure of a display panel in the prior art is shown;

[0027] Figure 2 A schematic cross-sectional structure diagram of a flexible display panel packaging structure provided in a specific embodiment of the present utility model is shown;

[0028] Figure 3A schematic diagram showing a top view of a flexible display panel packaging structure provided in a specific embodiment of the present invention is shown;

[0029] Figure 4 A schematic diagram showing a structural comparison of a cross section and a top view of a packaging structure at a through hole of a flexible display surface provided in a specific embodiment of the utility model.

[0030] Reference numerals:

[0031] 110 contact hole layer 121 metal layer

[0032] 122 first inorganic layer 130 gate layer

[0033] 140 second inorganic layer 150 second inorganic layer buffer layer

[0034] 160 barrier layer 170PI2 layer

[0035] 180Barrier1 layer190PI1 layer

[0036] 210 Isolation support structure 211 PLN layer

[0037] 212 Pixel definition layer 213 SP layer

[0038] 220 anode layer 310 first groove

[0039] 320 second groove 910 center

[0040] 920 Boundary DETAILED DESCRIPTION

[0041] Example embodiments will now be described more fully with reference to the accompanying drawings. However, example embodiments can be implemented in a variety of forms and should not be construed as limited to the embodiments set forth herein. Instead, these embodiments are provided so that the present invention will be comprehensive and complete and fully convey the concepts of the example embodiments to those skilled in the art. The same reference numerals in the figures represent the same or similar structures, and thus their repeated description will be omitted.

[0042] The words "first", "second" and similar words used in the specific description do not indicate any order, quantity or importance, but are only used to distinguish different components. In addition, in the description of the present invention, the directions or positional relationships indicated by the terms "upper" and "lower" are based on the directions or positional relationships shown in the drawings, which are only for the convenience of description, and do not indicate or imply that the devices or elements referred to must have a specific direction, be constructed and operate in a specific direction, and therefore cannot be understood as limiting the present invention.

[0043] The present application provides a flexible display panel packaging structure, including an insulating layer and a contact hole layer arranged in a display area and a non-display area. A composite layer is arranged between the insulating layer and the contact hole layer, the composite layer includes a metal layer and a first inorganic layer, the first inorganic layer is arranged on the side of the metal layer away from the contact hole layer, the contact hole layer and the composite layer have a first groove formed therein to expose the first inorganic layer, the first inorganic layer is provided with at least one second groove, and the second groove cooperates with the first groove to form physical isolation and protection for the flexible display panel. Through the above structural design, the utility model provides a new type of flexible display panel packaging structure, wherein the composite layer not only enhances the strength of the overall structure, but also effectively reduces the stress concentration phenomenon during the packaging process. In particular, the combined use of the first inorganic layer and the metal layer enables the packaging layer to protect its lower structure and maintain good integrity and stability when facing external mechanical stress. In addition, the matching arrangement of the inscribed groove and the first groove enables the packaging structure to provide a better sealing effect, further preventing the intrusion of external harmful substances such as water and oxygen. In this way, the durability and reliability of the packaging structure are significantly improved, effectively extending the service life of the flexible display panel.

[0044] Combine the following Figures 2-3 The flexible display panel packaging structure of an embodiment of the present application is specifically described. It is understandable that the following description is only an example and is not intended to limit the scope of protection of the present application. Figures 2-3 As shown, in this embodiment, the flexible display panel packaging structure includes an insulating layer, a composite layer and a contact hole layer 110. The insulating layer is divided into a display area and a non-display area, the composite layer is located between the insulating layer and the contact hole layer 110, and the composite layer includes a metal layer 121 and a first inorganic layer 122. The first inorganic layer 122 is arranged on the side of the metal layer 121 away from the contact hole layer 110. The contact hole layer 110 and the composite layer have a first groove 310 formed therein to expose the first inorganic layer 122, and the silicon nitride layer is provided with at least one second groove 320, and the second groove 320 cooperates with the first groove 310 to form physical isolation and protection for the flexible display panel. The packaging structure provided by the utility model is used for the packaging of a flexible display panel, especially the packaging at the through hole of a flexible OLED display panel. By improving the packaging layer and material selection, the intrusion of external substances such as water and oxygen is effectively prevented, and the problems of packaging failure and film cracking that are easy to occur in the traditional packaging structure are solved, and the reliability and service life of the display panel are significantly improved.

[0045] In order to further avoid the problem of the flexible display panel failing due to reaction with water and oxygen in the air, the first groove 310 is located above the non-display area. The first groove 310 is a circular or polygonal hole, a slit or a groove. The first groove 310 is obtained by etching the contact hole layer 110 and the composite layer in the fixed area. By providing the first groove 310 between the contact hole layer 110 and the composite layer, a physical barrier is formed to effectively prevent the intrusion of external harmful substances such as water and oxygen, thereby avoiding the problem of the flexible display panel, especially the OLED layer, failing due to reaction with water and oxygen in the air.

[0046] In order to further improve the packaging effect, the diameter of the second groove 320 is larger than the first groove 310. Figure 2 As shown, the second groove 320 is an inscribed groove formed by etching again based on the first groove 310 using the material property difference of the contact hole layer 110 and the composite layer, so the diameter of the inscribed groove is larger than the first groove 310. The design of the second groove 320, i.e., the inscribed groove structure, makes the packaging structure more stable and further improves the packaging effect by optimizing the size of the groove and the etching process.

[0047] In order to further improve the water and oxygen corrosion resistance and packaging effect of the flexible display panel packaging structure, the composite layer is designed as a storage capacitor layer GL2 to ensure that it has good electrical properties and stability. In the composition of the storage capacitor layer GL2, the metal layer 121 uses a molybdenum layer, namely GL2-MO. The molybdenum MO metal has excellent electrical conductivity and chemical stability, and can effectively protect the packaging layer and display elements during the flexible display panel packaging process. The first inorganic layer 122 uses a silicon nitride layer, namely GL2-SiNx, because it has high water and oxygen corrosion resistance and good mechanical strength, and can effectively block the penetration of water and oxygen, thereby improving the stability and reliability of the packaging layer. The technical effect of this design scheme is that it can effectively prevent water and oxygen from corroding the packaging structure of the flexible display panel, extend its service life, and at the same time improve the protection effect of the packaging layer on the display element, reduce the risk of packaging failure and film cracking, thereby improving the performance and reliability of the flexible display panel.

[0048] In order to further improve the water and oxygen corrosion resistance and packaging effect of the flexible display panel packaging structure, the second groove 320 of the utility model is formed by using CF 4 &O 2That is, the gas mixture of carbon tetrafluoride and oxygen continues to etch the contact hole layer 110 and the composite layer area, and then forms an inscribed groove structure. This gas mixture can effectively control the etching rate and surface quality during the etching process, and at the same time has good selectivity, and can achieve precise processing of the second groove 320, ensuring the accuracy and surface quality of the groove formation. The technical effect of this technical means is that by using a gas mixture of carbon tetrafluoride and oxygen to etch the second groove 320, it is possible to achieve precise processing of the flexible display panel packaging structure, ensuring the accuracy and surface quality of the groove formation, thereby improving the stability and reliability of the packaging layer, extending the service life of the flexible display panel, and reducing the risk of packaging failure.

[0049] In order to further improve the stability and water and oxygen corrosion resistance of the flexible display panel packaging structure, at least two isolation support structures 210 are arranged on the contact hole layer 110, and the first groove 310 and the second groove 320 are arranged between the isolation support structures 210. Figure 1 It is called a bank, and the function of the bank is to block the overflow of TFE ink. In this embodiment, a better packaging effect can be achieved by using a bank structure. The specific number of banks can be adjusted according to the specific situation. The number of banks for each product may be different, and the specific number is not limited. The technical effect of this technical means is that by providing an isolation support structure 210 (bank) on the contact hole layer 110, the overflow of TFE ink can be effectively blocked to prevent its impact on the packaging structure, while further enhancing the mechanical strength and stability of the packaging layer. Such a design can reduce the risk of packaging failure and film cracking, and improve the reliability and service life of the flexible display panel.

[0050] In order to further improve the stability and electrical performance of the flexible display panel packaging structure, a gate layer 130 is provided on the side of the composite layer away from the contact hole layer 110. In this embodiment, the gate layer 130 is GL1 (Gate Line 1), which serves as a "hub" for controlling the switch of the thin film transistor (TFT).

[0051] In order to further improve the stability and mechanical properties of the flexible display panel packaging structure, a second inorganic layer 140 is disposed on the side of the gate layer 130 away from the contact hole layer 110. In this embodiment, the second inorganic layer 140 is a PS layer, which crystallizes amorphous silicon into polysilicon.

[0052] In order to further improve the overall performance and reliability of the flexible display panel packaging structure, a second inorganic layer buffer layer 150 is provided on the side of the second inorganic layer 140 away from the contact hole layer 110. In this embodiment, the second inorganic layer buffer layer 150 is a PS Buffer layer, which can effectively buffer external stress and internal stress, and reduce the risk of film cracking and packaging failure caused by interlayer stress in the packaging structure.

[0053] In order to further improve the stability and durability of the flexible display panel packaging structure, a barrier layer 160 is provided on the side of the second inorganic layer buffer layer 150 away from the contact hole layer 110, and at the same time, the insulating layer is ensured to be located on the side of the barrier layer 160 away from the contact hole layer 110. In this embodiment, the barrier layer 160 is a Barrier2 layer. The function of the barrier layer 160 is to effectively prevent the penetration of harmful substances such as moisture and oxygen, and prevent them from corroding the internal structure and components of the display panel, thereby improving the stability and reliability of the packaging structure.

[0054] Optionally, an OLED layer is disposed on the side of the contact hole layer 110 away from the composite layer. Accordingly, the OLED layer located on the display area of ​​the insulating layer emits light, while the OLED layer located on the non-display area of ​​the insulating layer does not emit light.

[0055] like Figure 4 Shown is a schematic diagram of the cross-section and top view of the packaging structure at the through hole of the flexible display panel provided in this embodiment. The through hole is usually used to arrange light sensors, front cameras, etc. After drilling, packaging technology must be used around the through hole to ensure that the fine wires and various light-emitting materials around the through hole are not damaged due to exposure to the air. At the same time, it is also necessary to ensure that the image quality of the display area outside the through hole is not affected by the through hole. The through hole is through and no light is emitted from under the through hole. The through hole of the display panel corresponds to the non-display area of ​​the insulating layer, and the display area of ​​the insulating layer is located outside the through hole, which is not shown in the figure. The top view is a schematic diagram of a view from the top to the bottom of the display panel, and the cross-sectional view is a schematic diagram of the stacked structure of the display panel perpendicular to the up and down directions. In this embodiment, the through hole is circular, but the utility model is not limited to this. The relationship between the top view and the cross-sectional view is as shown in FIG. Figure 4 As shown, it is a cross-sectional view at a semicircle of a circular through hole. The flexible display panel packaging structure includes an insulating layer, a composite layer and a contact hole layer 110. The insulating layer adopts a double-layer PI (Polyimide) structure, in which a Barrier1 layer 180 is arranged between the lower PI1 layer 190 and the upper PI2 layer 170, and PI is polyimide. The contact hole layer 110 is a CT (Contact hole) layer, which is used to conduct the Gate drive MOS signal to the Data line through the contact hole.

[0056] The insulating layer is divided into a display area and a non-display area. The composite layer is located between the insulating layer and the contact hole layer 110. The composite layer is a storage capacitor layer GL2. The composite layer includes a metal layer 121 and a first inorganic layer 122. The metal layer 121 uses a molybdenum layer, namely GL2-MO, and the first inorganic layer 122 uses a silicon nitride layer, namely GL2-SiNx. The first inorganic layer 122 is arranged on the side of the metal layer 121 away from the contact hole layer 110. The contact hole layer 110 and the composite layer have a first groove 310 formed therein to expose the first inorganic layer 122. The first groove 310 is obtained by etching the contact hole layer 110 and the composite layer in a fixed area, that is, Figure 4 The number of the first groove 310 Slit is at least one. The first inorganic layer 122 is provided with at least one second groove 320. The second groove 320 is formed by etching again with a gas mixture of carbon tetrafluoride (CF4) and oxygen (O2) on the basis of forming the first groove 310 by utilizing the material property difference of the contact hole layer 110 and the composite layer. The second groove 320 cooperates with the first groove 310 to form physical isolation and protection for the flexible display panel. The setting of the first groove 310, i.e., Slit, is not limited in the present invention. Figure 4 The number and manner of setting the first groove 310 (Slite) and the second groove 320 (inscribed groove) are only an exemplary embodiment. Figure 4 Slit1 is arranged on the side of the boundary 920 of the through hole away from the center 910 relative to Bank, and Slit2 is arranged on the side of the boundary 920 of the through hole away from the center 910 relative to Bank. There is no specific restriction on the number of Slits arranged between Bank and the center 910; the opening width of each Slit is not unique, and the utility model does not impose specific restrictions on the specific width data. Other settings or combinations that can achieve the technical effect of this utility model belong to the protection scope of this utility model. The design of the edge Slit takes into account that the OLED material is evaporated on the entire surface, and the OLED evaporated material and the cathode are blocked by the Dam step difference to achieve a lateral encapsulation effect. Optionally, the second groove 320 is not arranged in the non-display area corresponding to the insulating layer, and only the inscribed groove, i.e., the second groove 320, is arranged at the through hole.

[0057] A gate layer 130 is provided on the side of the composite layer away from the contact hole layer 110. The gate layer 130 is GL1 (Gate Line 1), which serves as the "hub" for controlling the switch of the thin film transistor (TFT). A second inorganic layer 140 is provided on the side of the polar layer away from the contact hole layer 110. The second inorganic layer 140 is a PS layer. The PS (Poly Silicon) layer crystallizes amorphous silicon (Amorphous Silicon) into polycrystalline silicon (Poly Silicon). A second inorganic layer buffer layer 150 is provided on the side of the second inorganic layer 140 away from the contact hole layer 110. The second inorganic layer buffer layer 150 is a PS Buffer layer. The PS Buffer layer can effectively buffer external stress and internal stress, and reduce the risk of film cracking and packaging failure caused by interlayer stress in the packaging structure. A barrier layer 160 is provided on the side of the second inorganic layer buffer layer 150 away from the contact hole layer 110, and at the same time, it is ensured that the insulating layer is located on the side of the barrier layer 160 away from the contact hole layer 110. In this embodiment, the barrier layer 160 is a Barrier2 layer.

[0058] like Figure 2 As shown, the contact hole layer 110 is provided with a planarization layer 211 away from the composite layer. The planarization layer 211 is a PLN (Planarization) layer, which is used to eliminate the ups and downs caused by different patterns of the previous layer. The specific width of the planarization layer 211 can be set as needed, such as Figure 2 and Figure 4 The width setting in is only an exemplary setting, and the utility model does not make specific limitations. A pixel definition layer 212 is arranged on the side of the flat layer 211 away from the contact hole layer 110. The pixel definition layer 212 is a PD (Pixel Design) layer, which defines the area of ​​the RGB luminescent material. The specific width setting of the pixel definition layer 212 can be set as needed, such as Figure 2 and Figure 4 The width setting in is only an exemplary setting, and the utility model does not make specific limitations. Optionally, a SP layer 213 is provided on the side of the pixel definition layer 212 away from the flat layer 211, SP (Photo Spacer), which is used to maintain the uniformity and impact resistance of the gap. The specific width setting of the SP layer 213 can be set as needed, such as Figure 2 and Figure 4 The width setting in the example is only an exemplary setting and is not specifically limited in the present invention. The Bank is composed of a flat layer 211, a pixel definition layer 212 and an SP layer 213. The specific width setting of each Bank can be set as required, such as Figure 2 and Figure 4The width setting in is only an exemplary setting, and the utility model does not make specific limitations. Optionally, the side of the pixel definition layer 212 away from the flat layer 211 is provided with an anode layer 220, the anode layer 220 is the AE (Anode Electrode) layer, Ag is used as the OLED reflective layer, and the Top ITO is used as the anode. The specific width setting of the anode layer 220 can be set as needed, such as Figure 2 and Figure 4 The width setting in is only an exemplary setting, and the present invention does not make any specific limitation. Through the above structural design, the packaging effect and reliability of the flexible display panel are significantly improved. The multi-level structural design not only ensures the effective performance of the functions of each layer, but also enhances the stability and durability of the overall structure.

[0059] This structural design effectively improves the packaging effect and reliability of the flexible display panel through multi-layer materials and multi-level groove settings. The double-layer PI structure provides good insulation and mechanical strength, and the Barrier1 layer 180 further enhances the barrier effect against water and oxygen. The combination of the metal layer 121 and the inorganic layer not only improves the electrical performance, but also increases the stability of the structure. The design of multiple grooves can effectively relieve the stress in the packaging structure and prevent the generation of cracks, thereby extending the service life of the flexible display panel and improving its durability and reliability.

[0060] The utility model also provides a flexible display panel. The display panel is provided with a through hole. The packaging structure around the through hole adopts the above-mentioned flexible display panel packaging structure.

[0061] The utility model also provides a display device, which includes the above-mentioned flexible display panel.

[0062] It should be noted that, in the absence of conflict, the embodiments of the present invention and the features in different embodiments may be combined with each other.

[0063] The above contents are further detailed descriptions of the present invention in combination with specific preferred implementations, and the specific implementation of the present invention cannot be considered to be limited to these descriptions. For ordinary technicians in the technical field to which the present invention belongs, several simple deductions or substitutions can be made without departing from the concept of the present invention, which should be regarded as falling within the protection scope of the present invention.

Claims

1. A flexible display panel packaging structure, comprising an insulating layer arranged in a display area and a non-display area, and a contact hole layer, characterized in that: A composite layer is arranged between the insulating layer and the contact hole layer, and the composite layer includes a metal layer and a first inorganic layer. The first inorganic layer is arranged on the side of the metal layer away from the contact hole layer. The contact hole layer and the composite layer have a first groove formed therein to expose the first inorganic layer. The first inorganic layer is provided with at least one second groove, and the second groove cooperates with the first groove to form physical isolation and protection for the flexible display panel.

2. The flexible display panel packaging structure according to claim 1, characterized in that: The first groove is located above the non-display area, and the first groove is a circular or polygonal hole, a slit or a groove.

3. The flexible display panel packaging structure according to claim 2, characterized in that: The diameter of the second groove is larger than that of the first groove.

4. The flexible display panel packaging structure according to claim 1, characterized in that: The composite layer is a storage capacitor layer, the metal layer is a molybdenum layer, and the first inorganic layer is a silicon nitride layer.

5. The flexible display panel packaging structure according to claim 1, characterized in that: At least two isolation support structures are arranged on the contact hole layer, and the first groove and the second groove are arranged between the isolation support structures.

6. The flexible display panel packaging structure according to claim 1, characterized in that: A gate layer is arranged on a side of the composite layer away from the contact hole layer.

7. The flexible display panel packaging structure according to claim 6, characterized in that: A second inorganic layer is disposed on a side of the gate layer away from the contact hole layer.

8. The flexible display panel packaging structure according to claim 7, characterized in that: A second inorganic buffer layer is disposed on a side of the second inorganic layer away from the contact hole layer.

9. The flexible display panel packaging structure according to claim 8, characterized in that: A barrier layer is disposed on the side of the second inorganic buffer layer away from the contact hole layer, and the insulating layer is located on the side of the barrier layer away from the contact hole layer.

10. A flexible display panel, characterized in that: The display panel is provided with a through hole, and the packaging structure around the through hole adopts the flexible display panel packaging structure described in any one of claims 1-9.

11. A display device, characterized in that: The display device comprises the flexible display panel according to claim 10.

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