Narrow frame display panel and display device

Abstract

The present application relates to a narrow-frame display panel and a display device, the narrow-frame display panel comprising: a functional layer, the functional layer comprising a display area and a non-display area located outside the display area; a first encapsulation layer, the first encapsulation layer covers the display area and the non-display area of ​​the functional layer; a second encapsulation layer, the second encapsulation layer covers the surface of the first encapsulation layer, and the orthographic projection of the second encapsulation layer on the functional layer covers the display area; an annular retaining wall, the annular retaining wall is arranged on the surface of the first encapsulation layer, the annular retaining wall is arranged close to the edge of the first encapsulation layer, and the orthographic projection of the annular retaining wall on the functional layer is located in the non-display area, and the annular retaining wall blocks the second encapsulation layer to limit the overflow of the second encapsulation layer. The present application redesigns the layer structure of the display panel and adopts a single annular retaining wall to limit the overflow of the second encapsulation layer, while reducing the edge area of ​​the panel occupied by the annular retaining wall and reducing the frame width of the panel.

Description

Technical Field

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

[0002] Organic Light Emitting Diode (OLED) display is a self-luminous display. Compared with liquid crystal display (LCD), OLED display does not require a backlight, so OLED display is lighter and thinner. In addition, OLED display also has the advantages of high brightness, low power consumption, wide viewing angle, high response speed, wide operating temperature range, etc., and is increasingly used in various high-performance display fields.

[0003] In the related art, thin film encapsulation is often used to ensure that the organic light-emitting material and the electrode are not corroded by water vapor and oxygen in the external environment. Specifically, an inorganic encapsulation layer and an organic encapsulation layer are superimposed on the functional layer to achieve an encapsulation effect.

[0004] At the same time, in order to avoid the increase of the invalid area around the device due to the extension effect of the encapsulation layer, the prior art often etches a retaining wall on the surface of the functional layer. The retaining wall is arranged in a ring shape to shield the subsequent encapsulation layer and prevent the encapsulation layer from extending and overflowing and failing. Generally, two annular retaining walls are etched on the functional layer to prevent the encapsulation layer from failing.

[0005] However, due to the setting of the two retaining walls, the area of ​​the panel edge region occupied by the retaining walls is relatively large. In addition, the retaining walls are formed on the functional layer, and the inorganic layer will cover the retaining walls, further increasing the width of the retaining walls, resulting in a wider border of the formed panel, making it difficult to adapt to the display requirements of narrow borders and high screen-to-body ratio. Summary of the invention

[0006] The embodiments of the present application provide a narrow-frame display panel and a display device to solve the technical problem in the related art that the frame of the molded panel is relatively wide and it is difficult to adapt to the display requirements of narrow frame and high screen-to-body ratio.

[0007] In a first aspect, a narrow-border display panel is provided, comprising:

[0008] a functional layer, the functional layer comprising a display area and a non-display area located outside the display area;

[0009] A first encapsulation layer, wherein the first encapsulation layer covers the display area and the non-display area of ​​the functional layer;

[0010] A second encapsulation layer, wherein the second encapsulation layer covers a surface of the first encapsulation layer, and an orthographic projection of the second encapsulation layer on the functional layer covers the display area;

[0011] An annular retaining wall is arranged on the surface of the first encapsulation layer, the annular retaining wall is set close to the edge of the first encapsulation layer, and the positive projection of the annular retaining wall on the functional layer is located in the non-display area, and the annular retaining wall blocks the second encapsulation layer to limit the overflow of the second encapsulation layer.

[0012] In some embodiments, the annular retaining wall and the second packaging layer are both processed by inkjet printing.

[0013] In some embodiments, the inner side surface of the annular retaining wall is provided with a plurality of surface-increasing structures, and the plurality of surface-increasing structures are arranged at intervals along the extension direction of the annular retaining wall.

[0014] In some embodiments, the surface-enhancing structure includes convex strips or grooves.

[0015] In some embodiments, some of the plurality of surface-enhancing structures include convex strips, and another portion includes concave grooves.

[0016] In some embodiments, the orthographic projection of the protruding surface of the protruding strip on the first encapsulation layer is a plurality of line segments, at least one circular arc segment, or a combination of a plurality of line segments and at least one circular arc segment;

[0017] The orthographic projection of the groove wall of the groove on the first packaging layer is a plurality of line segments, at least one circular arc segment, or a combination of at least one line segment and at least one circular arc segment.

[0018] In some embodiments, the annular retaining wall includes at least one inner corner, and the inner corner of the annular retaining wall has an arc transition.

[0019] In some embodiments, a hydrophobic layer is provided on the surface of the annular retaining wall.

[0020] In some embodiments, the narrow-border display panel further includes a reinforcement structure, and the reinforcement structure includes:

[0021] A reinforcement recess, wherein the reinforcement recess is provided on the surface of the first packaging layer;

[0022] A reinforcement protrusion, wherein the reinforcement protrusion is integrally formed on the bottom surface of the annular retaining wall; wherein,

[0023] The annular retaining wall and the first packaging layer are plug-fitted through the reinforcement recess and the reinforcement protrusion.

[0024] The beneficial effects of the technical solution provided by this application include:

[0025] The embodiment of the present application provides a narrow-frame display panel, which is only arranged with one annular retaining wall to limit the overflow of the second encapsulation layer and prevent it from failing, thereby reducing the edge area of ​​the panel occupied by the annular retaining wall and reducing the frame width of the panel. The first encapsulation layer is first formed on the functional layer, and then the annular retaining wall is arranged on the first encapsulation layer. Since the first encapsulation layer is not covered by the annular retaining wall, the width of the annular retaining wall will not be further widened, thereby reducing the edge area of ​​the panel occupied by the annular retaining wall and reducing the frame width of the panel. In addition, the annular retaining wall is directly in contact with the second encapsulation layer and limits the overflow of the second encapsulation layer, so that the extension of the second encapsulation layer is blocked by changing the material properties of the annular retaining wall to prevent the failure of the second encapsulation layer.

[0026] In a second aspect, a display device is provided, comprising the narrow-border display panel as described above.

[0027] Another embodiment of the present application provides a display device. Since the display device includes the narrow-border display panel described above, the beneficial effects of the display device are consistent with the beneficial effects of the narrow-border display panel described above, which will not be repeated here. BRIEF DESCRIPTION OF THE DRAWINGS

[0028] In order to more clearly illustrate the technical solutions in the embodiments of the present application, the drawings required for use in the description of the embodiments will be briefly introduced below. Obviously, the drawings described below are only some embodiments of the present application. For ordinary technicians in this field, other drawings can be obtained based on these drawings without creative work.

[0029] Figure 1 A schematic diagram of a narrow-border display panel provided in an embodiment of the present application;

[0030] Figure 2 A cross-sectional view of a narrow-border display panel provided in an embodiment of the present application;

[0031] Figure 3 A schematic diagram of a surface enhancement structure provided in an embodiment of the present application as a groove;

[0032] Figure 4 A schematic diagram of a convex surface structure provided in an embodiment of the present application;

[0033] Figure 5 A schematic diagram of a plurality of surface-enhancing structures provided in an embodiment of the present application, some of which are protrusions and others are grooves;

[0034] Figure 6 A schematic diagram of a specific shape of a surface enhancement structure provided in an embodiment of the present application;

[0035] Figure 7 A schematic diagram of another specific shape of the surface enhancement structure provided in an embodiment of the present application;

[0036] Figure 8 A schematic diagram of another specific shape of the surface enhancement structure provided in an embodiment of the present application;

[0037] Fig. 9 A schematic diagram of another specific shape of the surface enhancement structure provided in an embodiment of the present application;

[0038] Fig.10 A schematic diagram of a reinforcement structure provided in an embodiment of the present application.

[0039] In the figure: 1, functional layer; 1a, display area; 1b, non-display area; 2, first packaging layer; 3, second packaging layer; 4, annular retaining wall; 5, surface enhancement structure; 6, reinforcement structure; 61, reinforcement depression; 62, reinforcement protrusion. DETAILED DESCRIPTION

[0040] In order to make the purpose, technical solution and advantages of the embodiments of the present application clearer, the technical solution 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. Obviously, the described embodiments are part of the embodiments of the present application, not all of the embodiments. Based on the embodiments in the present application, all other embodiments obtained by ordinary technicians in this field without making creative work are within the scope of protection of this application.

[0041] The embodiment of the present application provides a narrow-frame display panel and a display device. The narrow-frame display panel redesigns its layer structure and adopts a single annular retaining wall to limit the overflow of the second encapsulation layer while reducing the edge area of ​​the panel occupied by the annular retaining wall and reducing the frame width of the panel. The present application solves the technical problem that the frame of the molded panel in the related art is wide and it is difficult to adapt to the display requirements of narrow frame and high screen ratio.

[0042] Reference Figure 1 and Figure 2 , a narrow-frame display panel, comprising a functional layer 1, a first encapsulation layer 2, a second encapsulation layer 3 and an annular retaining wall 4.

[0043] Reference Figure 1 and Figure 2 The functional layer 1 includes a display area 1a and a non-display area 1b located outside the display area 1a, wherein the display area 1a is the light-emitting part of the panel, and the non-display area 1b is the frame part of the panel.

[0044] Reference Figure 1 and Figure 2, the first encapsulation layer 2 covers the display area 1a and the non-display area 1b of the functional layer 1, that is, the first encapsulation layer 2 covers the entire functional layer 1. In this embodiment, the first encapsulation layer 2 is an inorganic encapsulation layer, specifically, a chemical vapor deposition layer. The functional layer 1 is covered by the first encapsulation layer 2, and the functional layer 1 is encapsulated, so that the display area 1a of the functional layer 1 is isolated from water vapor and oxygen in the external environment, so as to prevent the display area 1a of the functional layer 1 from being corroded, and ensure the normal operation of the display area 1a.

[0045] Reference Figure 1 and Figure 2 , the second encapsulation layer 3 covers the surface of the first encapsulation layer 2, and the orthographic projection of the second encapsulation layer 3 on the functional layer 1 covers the display area 1a. The second encapsulation layer 3 is an organic encapsulation layer. The second encapsulation layer 3 encapsulates the display area 1a of the functional layer 1, so that the display area 1a of the functional layer 1 is isolated from water vapor and oxygen in the external environment, and the display area 1a of the functional layer 1 is prevented from being corroded, so as to ensure the normal operation of the display area 1a. The first encapsulation layer 2 and the second encapsulation layer 3 are combined to realize the complete encapsulation of the display area 1a of the functional layer 1, so as to prevent the display area 1a of the functional layer 1 from being corroded, and ensure the normal operation of the panel.

[0046] Reference Figure 1 and Figure 2 The annular retaining wall 4 is arranged on the surface of the first encapsulation layer 2, and the annular retaining wall 4 is arranged close to the edge of the first encapsulation layer 2. The positive projection of the annular retaining wall 4 on the functional layer 1 is located in the non-display area 1b, and the annular retaining wall 4 blocks the second encapsulation layer 3 to limit the overflow of the second encapsulation layer 3. In this way, the shape of the second encapsulation layer 3 is stable, and the encapsulation stability of the display area 1a of the functional layer 1 is ensured.

[0047] In this embodiment, only one annular retaining wall 4 is provided, and the annular retaining wall 4 is arranged on the surface of the first encapsulation layer 2, which is consistent with the surface where the second encapsulation layer 3 is arranged. Therefore:

[0048] On the one hand, the inner side of the annular retaining wall 4 is in direct contact with the second encapsulation layer 3, which is convenient for changing the material properties of the annular retaining wall 4 to prevent the second encapsulation layer 3 from overflowing through the form of a single annular retaining wall 4, thereby ensuring the encapsulation stability of the functional layer 1. Compared with the traditional form in which the inorganic encapsulation layer is covered on the surface of the annular retaining wall 4 and the inorganic encapsulation layer is in contact with the second encapsulation layer 3, the material of the inorganic encapsulation layer is difficult to change, so it is necessary to adopt the form of multiple annular retaining walls 4 to prevent the second encapsulation layer 3 from overflowing. Therefore, the traditional encapsulation structure results in a larger area of ​​the non-display area 1b reserved for the functional layer 1, which is reflected in the wider frame of the panel. The arrangement positions of the first encapsulation layer 2, the second encapsulation layer 3 and the annular retaining wall 4 introduced in this embodiment, the material selection of the annular retaining wall 4 is flexible, and it is convenient to suppress the overflow of the second encapsulation layer 3 through the material properties of the annular retaining wall 4, so only one annular retaining wall 4 is required. Therefore, in this embodiment, the non-display area 1b required to be reserved for the functional layer 1 is smaller, which is reflected in the narrower frame of the panel.

[0049] Secondly, since the first packaging layer 2 no longer covers the annular retaining wall 4, the first packaging layer 2 will not widen the annular retaining wall 4, further reducing the area of ​​the non-display region 1b required to be reserved for the functional layer 1, which is reflected in a narrower frame of the panel.

[0050] Furthermore, the annular retaining wall 4 and the second encapsulation layer 3 are both processed by inkjet printing. Specifically, the annular retaining wall 4 is partially processed by inkjet printing using electrofluidic technology, which has high printing accuracy and can achieve precise processing of the annular retaining wall 4, ensure the molding position of the annular retaining wall 4, reduce the width change caused by the molding position deviation of the annular retaining wall 4, and ensure that the position occupied by the annular retaining wall 4 is in the non-display area 1b, which is reflected in the frame of the panel being easier to control.

[0051] The second encapsulation layer 3 is processed by spray printing using piezoelectric technology or electrofluid technology. In this embodiment, the second encapsulation layer 3 is processed by spray printing using piezoelectric technology, which has sufficient printing accuracy and low processing cost.

[0052] Reference Figure 1 and Figure 2 In addition, since the annular retaining wall 4 and the second encapsulation layer 3 are both formed on the surface of the first encapsulation layer 2, the annular retaining wall 4 and the second encapsulation layer 3 can be printed and processed at the same time, which greatly reduces the processing time. The annular retaining wall 4 is no longer formed on the functional layer 1 by etching technology, which saves one step of the processing process. The forming process of the annular retaining wall 4 is merged into the forming step of the second encapsulation layer 3, and the processing efficiency of the panel is higher.

[0053] In this embodiment, a hydrophobic layer is provided on the surface of the annular retaining wall 4, and the hydrophobic layer is covered on the surface of the annular retaining wall 4 by inkjet printing technology. Due to the provision of the hydrophobic layer, the second encapsulation layer 3 is restricted from spreading onto the annular retaining wall 4 to prevent the second encapsulation layer 3 from overflowing from the annular retaining wall 4, ensuring that a single layer of the annular retaining wall 4 can block the second encapsulation layer 3. In this embodiment, the hydrophobic layer includes a fluorine layer.

[0054] Reference Figure 3 , wherein the inner side surface of the annular retaining wall 4 is provided with a plurality of surface-increasing structures 5, and the plurality of surface-increasing structures 5 are arranged at intervals along the extension direction of the annular retaining wall 4. The surface-increasing structures 5 are used to increase the total area of ​​the inner wall of the annular retaining wall 4, thereby increasing the contact area between the annular retaining wall 4 and the second encapsulation layer 3, and improving the limiting ability of the second encapsulation layer 3.

[0055] It should be noted that a hydrophobic layer is also provided on the surface of the surface-enhancing structure 5 of the annular retaining wall 4 .

[0056] Reference Figure 3-Figure 5 Specifically, the surface-enhancing structure 5 includes convex strips or grooves.

[0057] Reference Figure 3 In this embodiment, the multiple surface-increasing structures 5 on the inner side of the annular retaining wall 4 all include grooves, and the length direction of the grooves is arranged perpendicular to the first packaging layer 2. Since the annular retaining wall 4 is processed by inkjet printing technology, both ends of the grooves are opened, and one end of the groove is blocked by the first packaging layer 2.

[0058] Reference Figure 4 In some embodiments, the plurality of surface-increasing structures 5 on the inner side of the annular retaining wall 4 all include convex strips, and the convex strips are arranged perpendicular to the first packaging layer 2 .

[0059] Reference Figure 5 In some embodiments, some of the surface-increasing structures 5 on the inner side surfaces of the annular retaining walls 4 are grooves, and the other parts are convex strips. The convex strips and the grooves are alternately arranged in the extending direction of the annular retaining walls 4.

[0060] By providing the convex strips and / or grooves on the inner wall of the annular retaining wall 4, the total area of ​​the inner side of the annular retaining wall 4 is increased, and the contact area between the annular retaining wall 4 and the second encapsulation layer 3 is increased. On the one hand, when the second encapsulation layer 3 is not yet solidified, the annular retaining wall 4 is used to limit the overflow of the second encapsulation layer 3; on the other hand, due to the provision of the convex strips and / or grooves, after the second encapsulation layer 3 is solidified, it is better combined with the annular retaining wall 4, and the second encapsulation layer 3 and the annular retaining wall 4 are more integrated, thereby improving the molding quality of the display panel.

[0061] Reference Figure 6-Figure 9Furthermore, the orthographic projection of the protruding surface of the convex strip on the first packaging layer 2 is a plurality of line segments, at least one circular arc segment, or a combination of a line segment and at least one circular arc segment.

[0062] The orthographic projection of the groove wall of the groove on the first packaging layer 2 is a plurality of line segments, at least one circular arc segment, or a combination of at least one line segment and at least one circular arc segment.

[0063] It should be noted that, since the annular retaining wall 4 is formed by inkjet printing, the processing and forming of convex strips and grooves of various shapes can be easily achieved through printing pattern planning.

[0064] Specifically, the schematic diagram of the orthographic projection of the protruding surface of the convex strip on the first packaging layer 2 as multiple line segments can be referred to Figure 6 .

[0065] The schematic diagram of the orthographic projection of the protruding surface of the convex strip on the first packaging layer 2 as at least one arc segment can be referred to Figure 7 and Figure 8 The schematic diagram of the orthographic projection of the protruding surface of the convex strip on the first packaging layer 2 as a single arc segment is as follows: Figure 7 The schematic diagram of the orthographic projection of the convex surface of the convex strip on the first packaging layer 2 as a combination of multiple arc segments is as follows: Figure 8 .

[0066] The schematic diagram of the orthographic projection of the convex surface of the convex strip on the first packaging layer 2 as a combination of a line segment and at least one arc segment can be referred to Fig. 9 .

[0067] The schematic diagram of the orthographic projection of the groove wall on the first packaging layer 2 as multiple line segments can be referred to Figure 6 .

[0068] The schematic diagram of the groove wall of the groove being projected on the first packaging layer 2 as at least one arc segment can be referred to Figure 7 and Figure 8 The schematic diagram of the orthographic projection of the groove wall of the groove on the first packaging layer 2 as a single arc segment is as follows: Figure 7 The schematic diagram of the orthographic projection of the groove wall on the first packaging layer 2 as a combination of multiple arc segments is as follows: Figure 8 .

[0069] The schematic diagram of the groove wall of the groove being a combination of a line segment and at least one arc segment on the first packaging layer 2 can be referred to Fig. 9 .

[0070] Since the annular retaining wall 4 is processed by inkjet printing, the specific shape of the annular retaining wall 4 and the shape of the inner side surface of the annular retaining wall 4 can be specifically set, and the contact area between part of the annular retaining wall 4 and the second packaging layer 3 can be specifically increased to meet the blocking requirements of the second packaging layer 3, and can meet the processing requirements of a variety of different display panels.

[0071] The display panel may be a circular panel, an elliptical panel or a polygonal panel, etc. Specifically, the display area 1a of the functional layer 1 is circular, elliptical or polygonal in shape. Correspondingly, the inner ring of the annular retaining wall 4 is circular, elliptical or polygonal in shape.

[0072] Reference Figure 1 , the annular retaining wall 4 includes at least one inner corner, and the inner corner of the annular retaining wall 4 is transitioned by an arc. In this embodiment, the display area 1a of the functional layer 1 is square, the annular retaining wall 4 includes four inner corners, and the four inner corners of the annular retaining wall 4 are transitioned by an arc.

[0073] This arrangement increases the area of ​​the corner of the inner wall of the annular retaining wall 4 to limit the overflow of the second packaging layer 3 from the corner of the annular retaining wall 4 .

[0074] Reference Fig.10 Furthermore, the narrow-frame display panel further includes a reinforcement structure 6. The reinforcement structure 6 includes a reinforcement recess 61 and a reinforcement protrusion 62.

[0075] The reinforcement recess 61 is formed on the surface of the first packaging layer 2, and the reinforcement protrusion 62 is integrally formed on the bottom surface of the annular retaining wall 4. The annular retaining wall 4 and the first packaging layer 2 are plug-fitted through the reinforcement recess 61 and the reinforcement protrusion 62.

[0076] With such arrangement, the reinforcement structure 6 improves the connection strength between the annular retaining wall 4 and the first packaging layer 2 , and improves the integrity of the annular retaining wall 4 and the first packaging layer 2 .

[0077] Specifically, the reinforcement recess 61 includes a hole or a groove, and correspondingly, the reinforcement protrusion 62 includes a rod-shaped member or a strip-shaped member.

[0078] In this embodiment, when the first packaging layer 2 is formed, a reinforcement recess 61 is prefabricated on its surface. When the annular retaining wall 4 is processed by inkjet printing technology, the printing material falls onto the surface of the first packaging layer 2 and fills the reinforcement recess 61 to form a reinforcement protrusion 62.

[0079] The embodiment of the present application provides a narrow-frame display panel, which is only arranged with an annular retaining wall 4 to limit the overflow of the second encapsulation layer 3 and prevent it from failing, thereby reducing the edge area of ​​the panel occupied by the annular retaining wall 4 and reducing the frame width of the panel. The first encapsulation layer 2 is first formed on the functional layer 1, and then the annular retaining wall 4 is arranged on the first encapsulation layer 2. Since the first encapsulation layer 2 is not covered by the annular retaining wall 4, the width of the annular retaining wall 4 will not be further widened, thereby reducing the edge area of ​​the panel occupied by the annular retaining wall 4 and reducing the frame width of the panel. In addition, the annular retaining wall 4 is directly in contact with the second encapsulation layer 3 and limits the overflow of the second encapsulation layer 3, so as to block the extension of the second encapsulation layer 3 by changing the material properties of the annular retaining wall 4, so as to prevent the failure of the second encapsulation layer 3.

[0080] Another embodiment of the present application provides a display device, including the narrow-frame display panel as described above. The display device includes a mobile phone, a watch, a display screen, etc.

[0081] Another embodiment of the present application provides a display device. Since the display device includes the narrow-border display panel described above, the beneficial effects of the display device are consistent with the beneficial effects of the narrow-border display panel described above, which will not be repeated here.

[0082] In the description of the present application, it should be noted that the terms "upper", "lower", etc. indicate orientations or positional relationships based on the orientations or positional relationships shown in the accompanying drawings, and are only for the convenience of describing the present application and simplifying the description, rather than indicating or implying that the device or element referred to must have a specific orientation, be constructed and operated in a specific orientation, and therefore cannot be understood as a limitation on the present application. Unless otherwise clearly specified and limited, the terms "installed", "connected", and "connected" should be understood in a broad sense, for example, it can be a fixed connection, a detachable connection, or an integral connection; it can be a mechanical connection or an electrical connection; it can be a direct connection, or it can be an indirect connection through an intermediate medium, or it can be a connection between the two elements. For those of ordinary skill in the art, the specific meanings of the above terms in the present application can be understood according to the specific circumstances.

[0083] It should be noted that, in this application, relational terms such as "first" and "second" 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 sentence "comprise a ..." do not exclude the presence of other identical elements in the process, method, article or device including the elements.

[0084] The above description is only a specific implementation of the present application, so that those skilled in the art can understand or implement the present application. Various modifications to these embodiments will be apparent to those skilled in the art, and the general principles defined herein can be implemented in other embodiments without departing from the spirit or scope of the present application. Therefore, the present application will not be limited to the embodiments shown herein, but will conform to the widest range consistent with the principles and novel features applied for herein.

Claims

1. A narrow-frame display panel, characterized in that: It includes: a functional layer, the functional layer comprising a display area and a non-display area located outside the display area; A first encapsulation layer, wherein the first encapsulation layer covers the display area and the non-display area of ​​the functional layer; A second encapsulation layer, wherein the second encapsulation layer covers a surface of the first encapsulation layer, and an orthographic projection of the second encapsulation layer on the functional layer covers the display area; an annular retaining wall, the annular retaining wall is arranged on the surface of the first encapsulation layer, the annular retaining wall is arranged close to the edge of the first encapsulation layer, and the positive projection of the annular retaining wall on the functional layer is located in the non-display area, and the annular retaining wall blocks the second encapsulation layer to limit the overflow of the second encapsulation layer; wherein, The annular retaining wall and the second encapsulation layer are both processed by inkjet printing, and the annular retaining wall and the second encapsulation layer are printed at the same time.

2. The narrow-frame display panel according to claim 1, characterized in that: The inner side surface of the annular retaining wall is provided with a plurality of surface-increasing structures, and the plurality of surface-increasing structures are arranged at intervals along the extending direction of the annular retaining wall.

3. The narrow-frame display panel according to claim 2, wherein: The surface-increasing structure includes convex strips or concave grooves.

4. The narrow-frame display panel according to claim 2, wherein: Some of the plurality of surface-enhancing structures include convex strips, and another portion includes concave grooves.

5. The narrow-frame display panel according to claim 3 or 4, characterized in that: The orthographic projection of the protruding surface of the protruding strip on the first encapsulation layer is a plurality of line segments, at least one circular arc segment, or a combination of a plurality of line segments and at least one circular arc segment; The orthographic projection of the groove wall of the groove on the first packaging layer is a plurality of line segments, at least one circular arc segment, or a combination of at least one line segment and at least one circular arc segment.

6. The narrow-frame display panel according to claim 1, wherein: The annular retaining wall comprises at least one inner corner, and the inner corner of the annular retaining wall is in an arc transition.

7. The narrow-frame display panel according to claim 1, wherein: A hydrophobic layer is provided on the surface of the annular retaining wall.

8. The narrow-frame display panel according to claim 1, wherein: Also included is a reinforcement structure, the reinforcement structure comprising: A reinforcement recess, wherein the reinforcement recess is provided on the surface of the first packaging layer; A reinforcement protrusion, wherein the reinforcement protrusion is integrally formed on the bottom surface of the annular retaining wall; wherein, The annular retaining wall and the first packaging layer are plug-fitted through the reinforcement recess and the reinforcement protrusion.

9. A display device, characterized in that: Comprising the narrow-border display panel as claimed in any one of claims 1 to 8.

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