Film layer structure, display panel and display device

Abstract

The invention provides a film layer structure, a display panel and a display device. The film layer structure is provided with a display area and a frame area surrounding the display area, the film layer structure comprises a substrate, the first surface of the substrate is provided with a groove, and the groove is located in the frame area and extends along the frame area; the packaging layer is arranged on the first surface; the first dam is located between the substrate and the packaging layer and is arranged in the groove; and the second dam is arranged between the first surface and the packaging layer and is positioned on one side, far away from the display area, of the first dam. The groove, the first dam and the second dam act together, the packaging effect between the packaging layer and the substrate can be guaranteed, overflow and other problems are avoided, on the basis, the first dam is located in the groove, the total width of the groove, the first dam and the second dam can be reduced, therefore, the width of the frame can be effectively reduced, the size of the frame can be reduced, and the size of the frame can be reduced. The requirement of a user on a narrow frame is met.

Description

Technical Field

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

[0002] In this era of rapid development, screen technology has also made unprecedented progress, and its form has been constantly evolving to meet the needs of today's diversified society. As users' requirements for product quality and reliability increase, their desire for narrow screen borders has become stronger. Therefore, how to further reduce the size of the screen border has become a key issue in the field of screen research and development. The current method of reducing the size of the screen border is likely to reduce the reliability of the package, and overflow is prone to occur, affecting the yield of the screen. Summary of the invention

[0003] The embodiments of the present application provide a film layer structure, a display panel, and a display device, which are used to ensure packaging reliability and prevent overflow when shrinking the frame size.

[0004] In a first aspect, a film layer structure is provided, wherein the film layer structure has a display area and a frame area surrounding the display area, and the film layer structure includes: a substrate, wherein a first surface of the substrate has a groove, and the groove is located in the frame area and extends along the frame area; an encapsulation layer is arranged on the first surface; a first dam is located between the substrate and the encapsulation layer and is arranged in the groove; and a second dam is arranged between the first surface and the encapsulation layer and is located on a side of the first dam away from the display area.

[0005] In combination with the first aspect, in certain implementations of the first aspect, the first dam includes: a plurality of protrusions extending along a first direction, and the plurality of protrusions are arranged in sequence and spaced apart along the extension direction of the groove, wherein the first direction is the direction from the substrate to the packaging layer.

[0006] In combination with the first aspect, in some implementations of the first aspect, in the first direction, a cross-sectional area of ​​the protrusion gradually decreases.

[0007] In combination with the first aspect, in certain implementations of the first aspect, the protrusion includes a plurality of constituent segments, and the plurality of constituent segments are arranged in sequence along the first direction; wherein, in the first direction, the cross-sectional area of ​​the constituent segments gradually decreases; wherein, between any two adjacent constituent segments, the maximum cross-sectional area of ​​the constituent segment located on the first direction side is smaller than the minimum cross-sectional area of ​​the other constituent segment.

[0008] In combination with the first aspect, in certain implementations of the first aspect, the outer contour shape of the orthographic projection of the protrusion on the substrate includes at least one of the following shapes: arrow-shaped, L-shaped, cross-shaped, dovetail-shaped, circular, fan-shaped, triangular, rectangular, diamond-shaped and hexagonal.

[0009] In combination with the first aspect, in certain implementations of the first aspect, the groove is an annular groove arranged around the outside of the display area, and the plurality of protrusions are arranged in a ring along the extension direction of the annular groove; preferably, the second dam is an annular structure, and the second dam is arranged around the outside of the annular groove.

[0010] In combination with the first aspect, in certain implementations of the first aspect, the spacing between one end of the protrusion connected to the substrate and one end of the adjacent protrusion connected to the substrate ranges from 50um to 600um; preferably, the length of one end of the protrusion connected to the bottom of the groove along the extension direction of the groove ranges from 9.5um to 10.5um; preferably, the height of the protrusion along the first direction ranges from 1.5um to 4.5um; preferably, the taper range of the protrusion is from 30° to 75°.

[0011] In combination with the first aspect, in some implementations of the first aspect, the encapsulation layer includes: a first inorganic encapsulation layer; preferably, the encapsulation layer further includes: an organic encapsulation layer located on a side of the first inorganic encapsulation layer away from the substrate and located on a side of the second dam close to the display area. Preferably, the encapsulation layer further includes: a second inorganic encapsulation layer located on a side of the first inorganic encapsulation layer and the organic encapsulation layer away from the substrate.

[0012] In a second aspect, a display panel is provided, comprising the film layer structure as described in the first aspect.

[0013] In a third aspect, a display device is provided, comprising the film layer structure as described in the first aspect.

[0014] The present application provides a film layer structure, a display panel, and a display device, in which the groove, the first dam, and the second dam work together to ensure the packaging effect between the packaging layer and the substrate and avoid overflow and other problems. On this basis, the first dam is located in the groove, which can reduce the overall width of the groove, the first dam, and the second dam. Therefore, the width of the frame can be effectively reduced, which is conducive to shrinking the frame size and meeting the user's demand for a narrow frame. BRIEF DESCRIPTION OF THE DRAWINGS

[0015] The drawings described herein are used to provide a further understanding of the present application and constitute a part of the present application. The illustrative embodiments of the present application and their descriptions are used to explain the present application and do not constitute an improper limitation on the present application. In the drawings:

[0016] Figure 1 It is a schematic diagram of the membrane layer structure in the prior art.

[0017] Figure 2 It is a cross-sectional view of the border area in the prior art.

[0018] Figure 3 Schematic diagram of the film structure in one embodiment of the present application.

[0019] Figure 4 It is a cross-sectional view of a border area in a film layer structure in one embodiment of the present application.

[0020] Figure 5 Schematic diagram of the arrangement of protrusions in one embodiment of the present application.

[0021] Figure 6 This is a schematic diagram of an arrangement of protrusions in another embodiment of the present application.

[0022] Figure 7 It is a schematic diagram of the outer contour of the orthographic projection of a protrusion on a substrate in another embodiment of the present application.

[0023] Figure 8 It is a schematic diagram of the outer contour of the orthographic projection of a protrusion on a substrate in another embodiment of the present application.

[0024] Fig. 9 It is a schematic diagram of the outer contour of the orthographic projection of a protrusion on a substrate in another embodiment of the present application.

[0025] Fig.10 It is a schematic diagram of the outer contour of the orthographic projection of a protrusion on a substrate in another embodiment of the present application.

[0026] Fig.11 It is a schematic diagram of the outer contour of the orthographic projection of a protrusion on a substrate in another embodiment of the present application.

[0027] Fig.12 It is a schematic diagram of the outer contour of the orthographic projection of a protrusion on a substrate in another embodiment of the present application.

[0028] Fig.13 It is a schematic diagram of the outer contour of the orthographic projection of a protrusion on a substrate in another embodiment of the present application.

[0029] Fig.14 It is a schematic diagram of the outer contour of the orthographic projection of a protrusion on a substrate in another embodiment of the present application.

[0030] Fig.15 It is a schematic diagram of the outer contour of the orthographic projection of a protrusion on a substrate in another embodiment of the present application.

[0031] Fig.16 It is a schematic diagram of the outer contour of the orthographic projection of a protrusion on a substrate in another embodiment of the present application.

[0032] Fig.17 It is a schematic diagram of the outer contour of the orthographic projection of a protrusion on a substrate in another embodiment of the present application.

[0033] Reference numerals:

[0034] AA, display area; NA, frame area; Z, first direction; 100, substrate; 110, groove; 120, first surface; 500, encapsulation layer; 510, first inorganic encapsulation layer; 700, dam; 310, first dam; 311, protrusion; 320, second dam; 520, second inorganic encapsulation layer; 530, organic encapsulation layer. DETAILED DESCRIPTION

[0035] The technical solutions in the embodiments of the present application will be clearly and completely described below in conjunction with the drawings in the embodiments of the present application. In the detailed description below, many specific details are proposed to provide a comprehensive understanding of the present application. However, it is obvious to those skilled in the art that the present application can be implemented without the need for some of these specific details. The following description of the embodiments is only to provide a better understanding of the present application by illustrating examples of the present application. Obviously, the described embodiments are only a part of the embodiments of the present application, rather than all of the embodiments. Based on the embodiments in the present application, all other embodiments obtained by ordinary technicians in the field without making creative work are within the scope of protection of the present application. The features and exemplary embodiments of various aspects of the present application will be described in detail below.

[0036] Figure 1 is a schematic diagram of the membrane layer structure in the prior art, Figure 2 is a cross-sectional view of the border area in the prior art. Figure 1 and Figure 2 As shown, the screen body can be divided into a display area AA and a frame area NA, and its film layer structure is also divided into a display area AA and a frame area NA accordingly. Figure 2 It can be seen that the groove 110 and two dams 700 of the film structure in the prior art are arranged in sequence along the direction from the display area AA to the frame area NA to achieve packaging, and the groove 110 and the two dams 700 in this arrangement occupy a large space. In order to shrink the frame size, the common practice is to reduce the width of the dam 700, remove one of the dams 700, or remove the groove 110 structure, which will reduce the reliability of packaging and easily cause overflow. The film structure, display panel, and display device of the present application are intended to solve this problem.

[0037] Figure 3 This is a schematic diagram of a film structure in one embodiment of the present application. Figure 4It is a cross-sectional view of a border area in a film layer structure in one embodiment of the present application.

[0038] like Figure 3 and Figure 4 As shown, the film structure of this embodiment has a display area AA and a frame area NA surrounding the display area AA, wherein the shapes of the display area AA and the frame area NA can be flexibly selected as needed, for example Figure 3 As shown in FIG. 1 , the display area AA is a rectangular area, and the frame area NA is a rectangular annular area arranged outside the display area AA.

[0039] The film layer structure includes a substrate 100, a first dam 310, a second dam 320 and an encapsulation layer 500. The first surface 120 ( Figure 4 The upper surface of the substrate 100 has a groove 110, and the groove 110 is located in the frame area NA and extends along the frame area NA. The encapsulation layer 500 is disposed on the first surface 120. The first dam 310 is located between the substrate 100 and the encapsulation layer 500, and is disposed in the groove 110. The second dam 320 is disposed between the first surface 120 and the encapsulation layer 500, and the second dam 320 is located in the frame area NA, and is spaced from the first dam 310. The second dam 320 is located on a side of the first dam 310 away from the display area AA.

[0040] In this embodiment, the main function of the groove 110 is to slow down the flow rate of the organic encapsulation layer 530 in the display area AA and increase the encapsulation effect. The first dam 310 and the second dam 320 act as a retaining wall to block the organic encapsulation layer 530 in the display area AA. The first dam 310 is arranged in the groove 110 to form a combined structure that has both the slow flow and the retaining wall functions. By arranging the first dam 310 in the groove 110, the interval between the first dam 310 and the groove 110 can be omitted, so that the border area NA has a smaller width. It has been verified that this method can reduce the width of the border by about 200um, which is conducive to meeting the user's narrow border requirements. In addition, the combined effect of the groove 110, the first dam 310 and the second dam 320 in this embodiment can ensure the reliability of the package and prevent overflow, which is conducive to ensuring the yield and reliability of the screen.

[0041] Alternatively, if Figure 4 As shown, the width of the groove 110 gradually increases from the bottom to the opening position, thereby, on the one hand, facilitating the molding process of the groove 110 and the first dam 310 , and on the other hand, forming a better flow slowing and blocking effect.

[0042] Combination Figure 3 , Figure 5 and Figure 6In one embodiment, the first dam 310 includes a plurality of protrusions 311, the protrusions 311 extend along the first direction Z, one end of the protrusions 311 is fixedly connected to the bottom of the groove 110, and the other end extends to the outside of the groove 110 along the first direction Z. The plurality of protrusions 311 are sequentially arranged at intervals along the extension direction of the groove 110. For example, when the groove 110 extends along a straight line, the plurality of protrusions 311 are linearly arranged in the groove 110 along the extension direction of the groove 110, or, when the extension path of the groove 110 is annular (circular or square), the plurality of protrusions 311 are annularly arranged in the groove 110 along the extension direction of the groove 110.

[0043] Gaps are formed between adjacent protrusions 311 , and the sizes of the multiple gaps formed by the multiple protrusions 311 may be the same or different, and are flexibly determined according to the slow flow requirements at the locations of the protrusions 311 .

[0044] Preferably, among the plurality of protrusions 311 , the sizes of the gaps formed between adjacent protrusions 311 are all equal, so as to improve the uniformity, which is beneficial to ensure that different positions have a good packaging effect.

[0045] Preferably, the spacing a between one end of the protrusion 311 connected to the substrate 100 and one end of the adjacent protrusion 311 connected to the substrate 100 ranges from 50um to 600um, for example, 50um, 60um, 100um, 200um, 700um, 400um, 500um or 600um.

[0046] In this embodiment, the structural form of multiple spaced protrusions 311 located in the groove 110 can form a wavy area in the extension direction of the groove 110 and in the direction from the display area AA to the non-display area (i.e., the frame area) NA, which can better block the organic encapsulation layer 530 in the encapsulation layer 500 and slow down its flow rate so that the organic encapsulation layer 530 can be stuck in the gap between the protrusions 311 and cut off. In addition, it can make the inorganic encapsulation layer in the encapsulation layer 500 more closely combined with the first dam 310, thereby improving the encapsulation reliability.

[0047] Combination Figure 6In one embodiment, in the first direction Z, the cross-sectional area of ​​the protrusion 311 parallel to the substrate 100 gradually decreases, wherein the first direction Z is the direction from the substrate 100 to the protrusion 311, thereby enabling the protrusion 311 to form a taper with a gradually decreasing cross-sectional area from the end connected to the bottom of the groove 110 to the end away from the bottom of the groove 110. This not only enables the inorganic encapsulation layer in the encapsulation layer 500 to be more closely combined with the first dam 310, thereby improving the encapsulation reliability, but also reduces the processing difficulty of the protrusion 311, and increases the connection strength between the protrusion 311 and the bottom of the groove 110. Preferably, the taper range of the protrusion 311 is: 30° to 75°, for example, 30°, 45°, 60° or 75°.

[0048] Figure 7 FIG. 3 is a front view of a protrusion 311 in another embodiment of the present application. Figure 7 As shown, in some embodiments, the protrusion 311 includes a plurality of constituent segments, and the plurality of constituent segments extend along the first direction Z, and the plurality of constituent segments are sequentially arranged along the first direction Z. In the first direction Z, the cross-sectional area of ​​the constituent segments gradually decreases. The above cross section is a cross section perpendicular to the first direction Z. This embodiment does not specifically limit the number of constituent segments in the protrusion 311, for example, the number of constituent segments in the protrusion 311 is 2, 3 or 4, etc. Preferably, the protrusion 311 includes 2 constituent segments, and the 2 constituent segments are sequentially arranged along the first direction Z.

[0049] Preferably, between any two adjacent constituent segments, the maximum cross-sectional area of ​​the constituent segment located on the side of the first direction Z is smaller than the minimum cross-sectional area of ​​the other constituent segment. The cross section is a cross section perpendicular to the first direction Z. Since the cross-sectional area of ​​the constituent segment in the first direction Z gradually decreases, the maximum cross-sectional area of ​​the constituent segment located on the side of the first direction Z and the minimum cross-sectional area of ​​the other constituent segment in the two adjacent constituent segments are both located at the junction of the two adjacent constituent segments. When the maximum cross-sectional area of ​​the constituent segment located on the side of the first direction Z in the two adjacent constituent segments is smaller than the minimum cross-sectional area of ​​the other constituent segment, a step-like structure can be formed between the two adjacent constituent segments. This can further enhance the tightness between the inorganic encapsulation layer in the encapsulation layer 500 and the first dam 310, thereby improving the encapsulation reliability.

[0050] In some embodiments, the outer contour shape of the orthographic projection of the protrusion 311 on the substrate 100 includes at least one of the following shapes: an arrow shape (see Figure 5 ), L-shaped (see Figure 8 ), swallowtail (see Fig. 9 ), cross (see Fig.10 ), triangle (see Fig.11 ), rectangle (see Fig.12 ), rhombus (see Fig.13), hexagon (see Fig.14 ), round (see Fig.15 ) and fan-shaped (see Fig.16 and Fig.17 ). Among them, the arrow shape, L shape and dovetail shape are similar cross-sections, and are all composed of a first part and a second part that are arranged crosswise. The difference is that: in the arrow shape and dovetail shape, the corner formed by the intersection of the first part and the second part faces the display area AA, and when the outer contour of the orthographic projection of the protrusion 311 on the substrate 100 is L-shaped, one side of the first part faces the display area AA; in the arrow shape and L shape, the side of the first part away from the second part is arranged crosswise with the side of the second part away from the first part, and in the dovetail shape, the side of the first part away from the second part is arranged parallel to the side of the second part away from the first part.

[0051] The above-mentioned shapes are only examples of the outer contour shape of the orthographic projection of the protrusion 311 on the substrate 100. In some other embodiments, it can also be an elliptical shape, an irregular shape, etc., which should all be within the protection scope of the embodiments of the present application.

[0052] In this embodiment, the outer contour shape of the orthographic projection of the protrusion 311 on the substrate 100 can be one of the above shapes or any combination of two or more. Through a variety of optional shapes, the screen design can be more compatible and it is also helpful to reduce process requirements and implementation difficulty.

[0053] See you later Figure 3 In one embodiment, the groove 110 is an annular groove disposed around the outside of the display area AA. For example, if the display area AA is rectangular, the groove 110 is a rectangular annular groove disposed around the outside of the display area AA. Further, the plurality of protrusions 311 are arranged in an annular manner along the extension direction of the annular groove. Furthermore, the second dam 320 is an annular structure, and the second dam 320 is located outside the annular groove.

[0054] Thus, a good package can be formed around the display area AA, and the frame area NA around it can have a smaller width, thereby better meeting the user's narrow frame requirements.

[0055] Combination Figure 5 Preferably, the length c of one end of the protrusion 311 connected to the bottom of the groove 110 along the extension direction of the groove 110 ranges from 9.5um to 10.5um; for example, 9.5um, 10um or 10.5um.

[0056] Combination Figure 5 Preferably, the width d of one end of the protrusion 311 connected to the bottom of the groove 110 along the direction from the display area to the non-display area ranges from 9.5um to 10.5um; for example, 9.5um, 10um or 10.5um.

[0057] Combination Figure 6 Preferably, the height b of the protrusion 311 along the first direction Z ranges from 1.5um to 4.5um, for example, 1.5um, 2um, 2.5um, 3um, 3.5um, 4um or 4.5um.

[0058] In some embodiments, the protrusion 311 is formed by patterning and filling the groove 110 formed by etching.

[0059] Combination Figure 4 In one embodiment, the encapsulation layer 500 includes a first inorganic encapsulation layer 510, and the first inorganic encapsulation layer 510 is respectively attached to the first surface 120 of the substrate 100, the first dam 310, and the second dam 320. Preferably, the encapsulation layer 500 also includes an organic encapsulation layer 530, and the organic encapsulation layer 530 is located on the side of the first inorganic encapsulation layer 510 away from the substrate 100, and the organic encapsulation layer 530 is located on the side of the second dam 320 close to the display area AA. Preferably, the encapsulation layer 500 also includes a second inorganic encapsulation layer 520, and the second inorganic encapsulation layer 520 is located on the side of the first inorganic encapsulation layer 510 and the organic encapsulation layer 530 away from the substrate 100.

[0060] In this embodiment, the first inorganic encapsulation layer 510 and the second inorganic encapsulation layer 520 usually have high hardness and wear resistance, and mainly play the role of blocking external water and ions. The first inorganic encapsulation layer 510 and the second inorganic encapsulation layer 520 are attached to each other, which can improve the encapsulation effect, reduce the impact of water and oxygen in the environment on the display panel, and also improve the mechanical strength of the display panel.

[0061] The organic encapsulation layer 530 generally has good flexibility and mainly plays a planarization role. It can also serve as a buffer layer between the inorganic encapsulation layer and the light-emitting device to reduce the influence of stress on the light-emitting device.

[0062] In this embodiment, the first inorganic encapsulation layer 510 and the second inorganic encapsulation layer 520 are mainly composed of inorganic materials, such as metal oxides, nitrides or carbides, etc. The organic encapsulation layer 530 is usually made of polymer materials, such as polyimide, polyamide, polyparaxylene, etc.

[0063] In this embodiment, under the joint action of the groove 110, the first dam 310 and the second dam 320 and the first inorganic encapsulation layer 510 and the second inorganic encapsulation layer 520, the organic encapsulation layer 530 can be blocked on the side of the second dam 320 close to the display area AA to prevent overflow.

[0064] The present application also provides a display panel, comprising any of the above-mentioned film layer structures.

[0065] Optionally, the display panel of the present application may further include a light-emitting unit, etc., which is not specifically limited here.

[0066] The present application also provides a display device, comprising any of the above-mentioned film layer structures. The display device can be a notebook computer, a tablet computer, a mobile phone, a wearable device, etc., and the present application does not make any specific restrictions on this.

[0067] The display panel and display device provided in any embodiment of the present application belong to the same inventive concept as the film layer structure provided in the embodiment of the present application and have corresponding beneficial effects. Details not fully described in the embodiments of the display panel and display device can be found in the embodiment of the film layer structure and will not be repeated here.

[0068] It should be noted that in the drawings of the present application document, the sizes of layers and regions may be exaggerated for clarity of illustration. It is also understood that when an element or layer is referred to as being "on" another element or layer, it may be directly on the other element, or there may be an intermediate layer. In addition, it is understood that when an element or layer is referred to as being "under" another element or layer, it may be directly under the other element, or there may be more than one intermediate layer or element. In addition, it is also understood that when a layer or element is referred to as being "between" two layers or two elements, it may be the only layer between the two layers or two elements, or there may also be more than one intermediate layer or element. Similar reference numerals throughout the text indicate similar elements.

[0069] In addition, 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 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 a process, method, article or device including a series of elements includes not only those elements, but also other elements not explicitly listed, or also includes elements inherent to such process, method, article or device. In the absence of further restrictions, the elements defined by the statement "include..." do not exclude the presence of other identical elements in the process, method, article or device including the elements.

[0070] The technical features of the above embodiments may be arbitrarily combined. To make the description concise, not all possible combinations of the technical features in the above embodiments are described. However, as long as there is no contradiction in the combination of these technical features, they should be considered to be within the scope of this specification.

[0071] The above are only preferred embodiments of the present application and are not intended to limit the present application. Any modifications, equivalent substitutions, etc. made within the spirit and principles of the present application should be included in the protection scope of the present application.

Claims

1. A film structure, characterized in that: The film layer structure has a display area and a frame area surrounding the display area, and the film layer structure includes: A substrate, wherein a first surface of the substrate has a groove, and the groove is located in the frame area and extends along the frame area; An encapsulation layer, disposed on the first surface; A first dam is located between the substrate and the packaging layer and is disposed in the groove; The second dam is disposed between the first surface and the encapsulation layer and is located on a side of the first dam away from the display area.

2. The film structure according to claim 1, characterized in that: The first dam comprises: A plurality of protrusions are provided, wherein the protrusions extend along a first direction, and the plurality of protrusions are sequentially spaced apart along the extending direction of the groove, wherein the first direction is a direction from the substrate to the packaging layer.

3. The film structure according to claim 2, characterized in that: In the first direction, the cross-sectional area of ​​the protrusion gradually decreases.

4. The film structure according to claim 3, characterized in that: The protrusion includes a plurality of constituent segments, and the plurality of constituent segments are arranged in sequence along the first direction; wherein, in the first direction, the cross-sectional area of ​​the constituent segments gradually decreases; Among them, between any two adjacent constituent segments, the maximum cross-sectional area of ​​the constituent segment located on the first direction side is smaller than the minimum cross-sectional area of ​​the other constituent segment.

5. The film structure according to any one of claims 2 to 4, characterized in that: The outer contour shape of the orthographic projection of the protrusion on the substrate includes at least one of the following shapes: arrow shape, L shape, cross shape, dovetail shape, circle, fan shape, triangle, rectangle, diamond shape and hexagon.

6. The film structure according to any one of claims 2 to 4, characterized in that: The groove is an annular groove arranged around the outer side of the display area, and the plurality of protrusions are arranged in an annular manner along the extending direction of the annular groove; Preferably, the second dam is an annular structure, and the second dam is arranged around the outer side of the annular groove.

7. The film structure according to claim 3 or 4, characterized in that: The spacing between one end of the protrusion connected to the substrate and one end of the adjacent protrusion connected to the substrate ranges from 50um to 600um; Preferably, the length of one end of the protrusion connected to the bottom of the groove along the extending direction of the groove ranges from 9.5um to 10.5um; Preferably, the width of one end of the protrusion connected to the groove bottom of the groove along the direction from the display area to the non-display area ranges from 9.5um to 10.5um; Preferably, the height of the protrusion along the first direction ranges from 1.5um to 4.5um; Preferably, the taper of the protrusion ranges from 30° to 75°.

8. The film structure according to any one of claims 2 to 4, characterized in that: The encapsulation layer comprises: a first inorganic encapsulation layer; Preferably, the encapsulation layer further comprises: an organic encapsulation layer, located on a side of the first inorganic encapsulation layer away from the substrate and on a side of the second dam close to the display area; Preferably, the encapsulation layer further comprises: The second inorganic encapsulation layer is located on a side of the first inorganic encapsulation layer and the organic encapsulation layer away from the substrate.

9. A display panel, characterized in that: The invention comprises the film layer structure as claimed in any one of claims 1 to 8.

10. A display device, characterized in that: The invention comprises the film layer structure as claimed in any one of claims 1 to 8.

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