Display panel, display device and mobile terminal

Abstract

The invention discloses a display panel, a display device and a mobile terminal, the display panel is provided with a display area and a non-display area surrounding the display area, the display panel comprises a substrate, a plurality of retaining walls and a packaging layer, the retaining walls are arranged on the substrate at intervals, and the retaining walls are located in the non-display area. The packaging layer comprises a plurality of sub-layers, and at least one sub-layer extends from the display area to the non-display area and covers the plurality of retaining walls. Wherein in at least two adjacent retaining walls, the extension height of one retaining wall close to the display area in the thickness direction of the display panel is larger than the extension height of one retaining wall far away from the display area in the thickness direction, so that the step difference between the non-display area and the display area is reduced; the possibility that the packaging layer is stripped and cracks are generated due to stress concentration caused by overlarge step difference in the bending process is reduced, and the packaging effect of the display panel is further improved.

Description

Technical Field

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

[0002] Flat display panels such as Liquid Crystal Display (LCD) panels, Organic Light Emitting Display (OLED) panels and display panels using Light Emitting Diode (LED) devices are widely used in various consumer electronic products such as mobile phones, televisions, personal digital assistants, digital cameras, laptops, desktop computers, etc. due to their advantages such as high image quality, power saving, thin body and wide application range, becoming the mainstream in display devices.

[0003] Due to the difference in structural design between the border area and the display area of ​​OLED display devices, packaging failure is likely to occur at the border position when the product is bent. Summary of the invention

[0004] The embodiments of the present application provide a display panel, a display device and a mobile terminal, aiming to improve the packaging effect of the display panel.

[0005] An embodiment of the first aspect of the present application provides a display panel, the display panel having a display area and a non-display area arranged around the display area, the display panel comprising: a substrate; a plurality of retaining walls arranged at intervals on the substrate and located in the non-display area, wherein at least two adjacent retaining walls, the one close to the display area has a greater extension height in the thickness direction of the display panel than the one far from the display area; an encapsulation layer arranged on the substrate, the encapsulation layer comprising a plurality of sub-layers, at least one of the sub-layers extending from the display area to the non-display area and covering the plurality of retaining walls.

[0006] According to an implementation of the first aspect of the present application, among any two adjacent ones of the plurality of retaining walls, the extending height of the one close to the display area is greater than the extending height of the one away from the display area.

[0007] According to any of the aforementioned embodiments of the first aspect of the present application, the retaining wall includes a first side surface and a second side surface, one of the first side surface and the second side surface faces the display area, and the other faces away from the display area, and the distance between the first side surface and the second side surface gradually decreases in the direction away from the substrate.

[0008] According to any of the aforementioned embodiments of the first aspect of the present application, a first preset angle is provided between the first side surface and the reference surface, a second preset angle is provided between the second side surface and the reference surface, the reference surface is perpendicular to the thickness direction, and among the multiple retaining walls, the first preset angle of the one close to the display area is greater than the first preset angle of the one away from the display area, and / or the second preset angle of the one close to the display area is greater than the second preset angle of the one away from the display area.

[0009] According to any of the aforementioned embodiments of the first aspect of the present application, the first preset angle is greater than the second preset angle.

[0010] According to any of the aforementioned embodiments of the first aspect of the present application, the first side surface is a curved surface, the first preset angle is the angle between the tangent plane of the first side surface and the reference plane, and / or the second side surface is a curved surface, and the second preset angle is the angle between the tangent plane of the second side surface and the reference plane.

[0011] According to any of the aforementioned embodiments of the first aspect of the present application, the encapsulation layer includes a first encapsulation layer, a second encapsulation layer and a third encapsulation layer arranged in sequence on the side away from the substrate, the second encapsulation layer is located in the display area, and the first encapsulation layer and the third encapsulation layer extend from the display area to the non-display area and cover the retaining wall.

[0012] According to any of the aforementioned embodiments of the first aspect of the present application, the first encapsulation layer and the third encapsulation layer are inorganic encapsulation layers.

[0013] According to any of the aforementioned embodiments of the first aspect of the present application, the second encapsulation layer is an organic encapsulation layer.

[0014] According to any of the aforementioned embodiments of the first aspect of the present application, a buffer layer is provided on a side of the third encapsulation layer facing away from the substrate.

[0015] According to any of the aforementioned implementations of the first aspect of the present application, the buffer layer includes a first sub-portion, the first sub-portion is located in the non-display area, and at least a portion of the first sub-portion is filled between two adjacent retaining walls.

[0016] According to any of the aforementioned embodiments of the first aspect of the present application, the buffer layer further includes a second section, the thickness of the second encapsulation layer decreases in a direction approaching the retaining wall to form a gap between the second encapsulation layer and the retaining wall, and at least part of the second section is located in the gap.

[0017] According to any of the aforementioned embodiments of the first aspect of the present application, the material of the buffer layer includes an organic material.

[0018] According to any of the aforementioned embodiments of the first aspect of the present application, the surface of the third encapsulation layer facing away from the substrate includes a first sub-segment and a second sub-segment, the first sub-segment is not covered by the buffer layer, the second sub-segment is covered by the buffer layer, and the first sub-segment smoothly transitions to the surface of the buffer layer facing away from the substrate.

[0019] According to any of the aforementioned embodiments of the first aspect of the present application, an insulating layer is also included between the substrate and the encapsulation layer, and the insulating layer is recessed toward the substrate to form a groove. The groove is located on the side of the retaining wall away from the display area, and the groove extends along a first direction, and the first direction is perpendicular to the thickness direction and the direction from the display area to the non-display area.

[0020] According to any of the aforementioned implementations of the first aspect of the present application, the groove is arranged around the display area.

[0021] According to any of the aforementioned embodiments of the first aspect of the present application, there are multiple grooves.

[0022] According to any of the aforementioned embodiments of the first aspect of the present application, the plurality of grooves are arranged at intervals along a direction from the display area to the non-display area.

[0023] According to any of the aforementioned embodiments of the first aspect of the present application, the insulating layer includes at least one of a planarization layer and an interlayer dielectric layer.

[0024] An embodiment of a second aspect of the present application provides a display device, comprising the display panel as described above.

[0025] An embodiment of a third aspect of the present application provides a mobile terminal, comprising the display device as described above.

[0026] In the display panel provided in the embodiment of the present application, the display panel has a display area and a non-display area arranged around the display area, the display area is used to set the light-emitting unit to realize the display function of the display panel, and the non-display area is used to arrange the metal wiring. The display panel includes a substrate, a plurality of retaining walls arranged at intervals on the substrate, and an encapsulation layer, wherein the plurality of retaining walls are located in the non-display area. When the encapsulation layer includes an organic material, the retaining wall can be used to stop the organic material in the display area from overflowing to the non-display area. The encapsulation layer includes a plurality of sublayers, and the sealing effect of the encapsulation layer is improved by setting the plurality of sublayers. At least one of the plurality of sublayers extends from the display area to the non-display area and covers the plurality of retaining walls, which can improve the water vapor from entering the display area along the retaining wall, and further improve the sealing effect. Among them, among at least two adjacent retaining walls, the extension height of the one close to the display area in the thickness direction of the display panel is greater than the extension height of the one far from the display area in the thickness direction, thereby reducing the step difference between the non-display area and the display area, reducing the possibility of stress concentration peeling and cracking of the encapsulation layer due to excessive step difference during bending, and thus improving the encapsulation effect of the display panel. BRIEF DESCRIPTION OF THE DRAWINGS

[0027] Other features, objects and advantages of the present application will become more apparent by reading the following detailed description of non-limiting embodiments with reference to the accompanying drawings, in which the same or similar reference numerals represent the same or similar features and the accompanying drawings are not drawn to scale.

[0028] Figure 1 is a schematic top view of a display panel provided in an embodiment of the present application;

[0029] Figure 2 This is one of the structural schematic diagrams of a display panel provided according to an embodiment of the present application;

[0030] Figure 3 This is a second structural schematic diagram of a display panel provided according to an embodiment of the present application;

[0031] Figure 4 This is a third structural schematic diagram of a display panel provided according to an embodiment of the present application;

[0032] Figure 5 This is a fourth structural schematic diagram of a display panel provided according to an embodiment of the present application;

[0033] Figure 6 This is a fifth structural schematic diagram of a display panel provided according to an embodiment of the present application;

[0034] Figure 7 This is a sixth structural schematic diagram of a display panel provided according to an embodiment of the present application;

[0035] Figure 8 is a seventh structural schematic diagram of a display panel provided according to an embodiment of the present application;

[0036] Fig. 9 This is an eighth structural schematic diagram of a display panel provided according to an embodiment of the present application.

[0037] Description of reference numerals:

[0038] 10. Display panel;

[0039] 100. Substrate;

[0040] 200, retaining wall; 210, first side surface; 220, second side surface;

[0041] 300, encapsulation layer; 310, first encapsulation layer; 320, second encapsulation layer; 330, third encapsulation layer; 331, first subsection; 332, second subsection; 340, buffer layer; 341, first subsection; 342, second subsection;

[0042] 400, insulating layer; 410, groove;

[0043] α i , a first preset angle; β i , a second preset angle;

[0044] Z, thickness direction; X, first direction; O, reference plane;

[0045] AA, display area; NA, non-display area. DETAILED DESCRIPTION

[0046] The features and exemplary embodiments of various aspects of the present application will be described in detail below. In order to make the purpose, technical solutions and advantages of the present application clearer, the present application will be further described in detail below in conjunction with the accompanying drawings and specific embodiments. It should be understood that the specific embodiments described herein are only configured to explain the present application and are not configured to limit the present application. For those skilled in the art, 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 the examples of the present application.

[0047] It should be noted that, 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 existence of other identical elements in the process, method, article or device including the elements.

[0048] It should be understood that when describing the structure of a component, when a layer or a region is referred to as being "on" or "over" another layer or another region, it may mean that it is directly on the other layer or another region, or that other layers or regions are included between it and the other layer or another region. Moreover, if the component is turned over, the layer or a region will be "below" or "beneath" another layer or another region.

[0049] On electronic devices such as mobile phones and tablet computers, it is necessary to integrate photosensitive components such as a front camera, an infrared light sensor, a proximity light sensor, etc. on one side of the display panel. In some embodiments, a light-transmitting display area can be provided on the above electronic device, and the photosensitive component can be provided on the back of the light-transmitting display area, so as to realize full-screen display of the electronic device while ensuring the normal operation of the photosensitive component.

[0050] The display panel includes an array substrate and a light-emitting device layer disposed on the array substrate, and an encapsulation layer for encapsulating the light-emitting device layer. In the related art, the light-emitting device layer includes a light-emitting unit, the light-emitting unit includes an organic light-emitting material, and the encapsulation layer also includes an organic material. When the display panel is not tightly encapsulated, water vapor may penetrate into the organic material. On the one hand, the water vapor will diffuse in the organic material to the display area and affect the display of the display panel. On the other hand, the organic material may swell when absorbing water, resulting in peeling of the film layer, which in turn causes problems such as poor sealing.

[0051] In order to solve the above problems, the embodiments of the present application provide a display panel, a display device and a method for manufacturing the display panel. The embodiments of the display panel and the display device will be described below in conjunction with the accompanying drawings.

[0052] An embodiment of the present application provides a display panel, which may be an organic light emitting diode (OLED) display panel.

[0053] See also Figures 1 to 3 , Figure 1 is a schematic top view of a display panel 10 provided according to an embodiment of the present application. Figure 2 is one of the structural schematic diagrams of a display panel 10 provided according to an embodiment of the present application; Figure 3 This is a second structural schematic diagram of a display panel 10 provided according to an embodiment of the present application.

[0054] like Figure 1 and Figure 2 As shown, the display panel 10 provided by the embodiment of the first aspect of the present application has a display area AA and a non-display area NA arranged around the display area AA, and the display panel 10 includes: a substrate 100, a plurality of retaining walls 200, and an encapsulation layer 300. The plurality of retaining walls 200 are arranged at intervals on the substrate 100 and located in the non-display area NA, and at least two adjacent retaining walls 200, the one close to the display area AA has a greater extension height in the thickness direction Z of the display panel 10 than the one away from the display area AA. The encapsulation layer 300 is arranged on the substrate 100, and the encapsulation layer 300 includes a plurality of sub-layers, at least one of which extends from the display area AA to the non-display area NA and covers the plurality of retaining walls 200.

[0055] In the display panel 10 provided in the embodiment of the present application, the display panel 10 has a display area AA and a non-display area NA arranged around the display area AA, the display area AA is used to set the light-emitting unit to realize the display function of the display panel 10, and the non-display area NA is used to arrange metal wiring. The display panel 10 includes a substrate 100, a plurality of retaining walls 200 spaced apart on the substrate 100, and an encapsulation layer 300, wherein the plurality of retaining walls 200 are located in the non-display area NA. When the encapsulation layer 300 includes an organic material, the retaining wall 200 can be used to stop the organic material of the display area AA from overflowing to the non-display area NA. The encapsulation layer 300 includes a plurality of sub-layers, and the sealing effect of the encapsulation layer 300 is improved by setting the plurality of sub-layers. At least one of the plurality of sub-layers extends from the display area AA to the non-display area NA and covers the plurality of retaining walls 200, which can improve the entry of water vapor into the display area AA along the retaining walls and further improve the sealing effect. Among them, among at least two adjacent retaining walls 200, the one closer to the display area AA has a greater extension height in the thickness direction Z of the display panel 10 than the one farther away from the display area AA, thereby reducing the step difference between the non-display area NA and the display area AA, and reducing the possibility of stress concentration and peeling of the encapsulation layer 300 due to excessive step difference during bending, thereby generating cracks, thereby improving the encapsulation effect of the display panel 10.

[0056] Optionally, there are many ways to set the substrate 100. For example, the substrate 100 can be an array substrate. The substrate 100 includes a substrate and a driving circuit layer arranged on the substrate. The driving circuit layer can be located in the display area AA domain, and the retaining wall 200 can be directly formed on the substrate.

[0057] Optionally, the number of the retaining walls 200 is two or more, and the more than two retaining walls 200 are spaced apart in a direction away from the display area AA. Arranging a plurality of retaining walls 200 can further improve the effect of reducing the step difference between the display area and the non-display area.

[0058] In some optional embodiments, among any two adjacent ones of the plurality of blocking walls 200 , the extending height of the one close to the display area AA is greater than the extending height of the one away from the display area AA.

[0059] In these optional embodiments, the extension height of any two adjacent ones of the plurality of retaining walls 200, the one close to the display area AA, is greater than the one away from the display area AA. That is, among the plurality of retaining walls 200, the extension height of the plurality of retaining walls 200 gradually decreases in the direction from the display area AA toward the non-display area NA. Thus, the step difference between the non-display area NA and the display area AA is reduced in a step-like manner, further reducing the possibility of the encapsulation layer 300 peeling off and generating cracks due to stress concentration caused by excessive step difference during the bending process, thereby improving the encapsulation effect of the display panel 10.

[0060] In some optional embodiments, the retaining wall 200 includes a first side surface 210 and a second side surface 220, one of the first side surface 210 and the second side surface 220 faces the display area AA, and the other faces away from the display area AA, and the distance between the first side surface 210 and the second side surface 220 gradually decreases in the direction away from the substrate 100.

[0061] In these optional embodiments, the retaining wall 200 includes a first side surface 210 and a second side surface 220, and the distance between the first side surface 210 and the second side surface 220 gradually decreases in the direction away from the substrate 100. The first side surface 210 and the second side surface 220 are arranged tilted, and when the first side surface 210 is located on the side of the retaining wall 200 close to the display area AA, in the direction from the display area AA to the non-display area NA, the height of the retaining wall 200 gradually increases due to the inclination of the first side surface 210, thereby reducing the possibility of stress concentration in the encapsulation layer 300 due to excessive step difference during the bending process, resulting in peeling and cracking.

[0062] In some optional embodiments, the first side surface 210 and the reference surface O have a first preset angle α i , a second preset angle β is formed between the second side surface 220 and the reference surface O i The reference plane O is perpendicular to the thickness direction Z. Among the plurality of retaining walls 200, the first preset angle α of one of the retaining walls 200 close to the display area AA is i greater than a first predetermined angle α away from the display area AA i .

[0063] In these optional embodiments, the first preset angle α i and the second preset angle β i are the slope angles between the first side surface 210 and the reference surface O and between the second side surface 220 and the reference surface O. Wherein, i can be a positive integer. In the direction from the display area AA to the non-display area NA, the first preset angles α of the plurality of retaining walls are i They can be α1, α2, ... α i , a second preset angle β of the plurality of retaining walls i They can be β1, β2, ... β i .

[0064] Among them, the first preset angle α i It can be located on the side close to the display area AA or on the side away from the display area AA. Figure 2 As shown, the first side surface 210 may face the display area AA, and the second side surface 220 may face away from the display area AA.

[0065] Optional, such as Figure 3As shown, the first side surface 210 may be located at a side away from the display area AA, and the second side surface 220 may be located toward a side of the display area AA.

[0066] For ease of understanding, the embodiment of the present application is described with the first side surface 210 being the side facing the display area AA and the second side surface 220 being the side away from the display area AA.

[0067] When the first side surface 210 is located at a side facing the display area AA and the second side surface 220 is located at a side away from the display area AA, as shown in FIG. Figure 4 As shown, among the plurality of retaining walls 200, the first preset angle α of one of the retaining walls 200 close to the display area AA is i greater than a first predetermined angle α away from the display area AA i , that is, α1>α2>α3>……α i As a result, in the direction away from the display area AA, the slope angle of the first side surface 210 of the retaining wall 200 gradually decreases, and the height of the retaining wall 200 gradually decreases.

[0068] Optional, such as Figure 5 As shown, among the plurality of retaining walls 200, the second preset angle β1 of the one close to the display area AA is greater than the second preset angle β2 of the one away from the display area AA, that is, β1>β2>β3>...β i As a result, in the direction away from the display area AA, the slope angle of the first side surface 210 of the retaining wall 200 gradually decreases, and the height of the retaining wall 200 gradually decreases.

[0069] Optional, such as Figure 6 As shown, among the plurality of retaining walls 200, a first preset angle α may be set close to the display area AA. i greater than a first predetermined angle α away from the display area AA i , and at the same time setting a second preset angle β close to the display area AA i A second predetermined angle β greater than the one away from the display area AA i The step difference between the encapsulation layer in the display area AA and the non-display area NA can be further reduced, thereby improving the encapsulation effect of the display panel.

[0070] Optionally, the first preset angles α of different retaining walls 200 may be adjusted simultaneously. i Or the second preset angle β i For example, Figure 7 As shown, in the direction from the display area AA to the non-display area NA, the first preset angle α of the first retaining wall 200 can be adjusted. i Greater than the first preset angle α of the second retaining wall 200 i , and the first preset angle α of the first retaining wall 200 iEqual to the first preset angle α of the third retaining wall 200 i . Set the second preset angle β of the first retaining wall 200 i Equal to the second preset angle β of the second retaining wall 200 i , and the second preset angle β of the first retaining wall 200 i A second preset angle β greater than the third retaining wall 200 i As long as the first preset angle α of each retaining wall 200 can be adjusted i Or the second preset angle β i Thereby, the extension height of the retaining wall 200 can be adjusted.

[0071] Optionally, the first preset angle α corresponding to the adjacent retaining walls 200 is i and the second preset angle β corresponding to the adjacent retaining wall 200 i The value of the difference is not specifically limited, and the first preset angle α corresponding to the adjacent retaining walls 200 i and the second preset angle β corresponding to the adjacent retaining wall 200 i The difference can be equal or unequal, which can be selected in the specific production process.

[0072] Optionally, the shapes of the plurality of retaining walls 200 are not specifically limited, and the retaining walls 200 may be of a symmetrical structure or an asymmetrical structure, as long as the retaining walls 200 gradually decrease in height as they extend from the display area AA toward the non-display area NA.

[0073] For example, in some optional embodiments, the first preset angle α i Greater than the second preset angle βi.

[0074] In these optional embodiments, when the first side surface 210 faces the display area AA and the second side surface 220 faces away from the display area AA, the first preset angle α i Greater than the second preset angle β i It can be understood that the first side surface 210 and the second side surface 220 can be arranged asymmetrically, and the slope corresponding to the second side surface 220 is gentler than the slope corresponding to the first side surface 210, so as to reduce the occupied area of ​​the plurality of retaining walls 200 in the non-display area NA.

[0075] Optionally, the retaining wall 200 may have a variety of shapes. For example, the first side surface 210 of the retaining wall 200 may be a curved surface, and the first preset angle α i The angle φ is the included angle between the cut surface of the first side surface 210 and the reference plane O, which can improve the possibility of the barrier wall 200 damaging the encapsulation layer 300 and generating cracks when the encapsulation layer 300 is deposited.

[0076] Optionally, the second side surface 220 may also be a curved surface, and the second preset angle βi The angle φ is the included angle between the cut surface of the second side surface 220 and the reference plane O, which can further improve the possibility of the barrier wall 200 damaging the encapsulation layer 300 and generating cracks when the encapsulation layer 300 is deposited.

[0077] Optionally, the first side surface 210 and the second side surface 220 may both be curved surfaces, so as to facilitate manufacturing and further improve the packaging effect.

[0078] In some optional embodiments, the encapsulation layer 300 includes a first encapsulation layer 310, a second encapsulation layer 320 and a third encapsulation layer 330 which are arranged in sequence on the side facing away from the substrate 100, the second encapsulation layer 320 is located in the display area AA, and the first encapsulation layer 310 and the third encapsulation layer 330 extend from the display area AA to the non-display area NA and cover the retaining wall 200.

[0079] In these optional embodiments, Figure 4 As shown, the encapsulation layer 300 includes a first encapsulation layer 310, a second encapsulation layer 320 and a third encapsulation layer 330 which are sequentially arranged on the side away from the substrate 100, the second encapsulation layer 320 is located in the display area AA, and the first encapsulation layer 310 and the third encapsulation layer 330 extend from the display area AA to the non-display area NA and cover the retaining wall 200. The display panel 10 is encapsulated to ensure the effectiveness of the encapsulation.

[0080] Optionally, the first encapsulation layer 310 is an inorganic encapsulation layer 300 , and the inorganic encapsulation layer 300 may be prepared by chemical vapor deposition, which can improve the compactness of the first encapsulation layer 310 , thereby improving the encapsulation effect of the encapsulation layer 300 .

[0081] Optionally, the encapsulation layer 300 further includes a second encapsulation layer 320 located on the side of the first encapsulation layer 310 away from the substrate 100, and the material of the second encapsulation layer 320 includes an organic material. That is, the second encapsulation layer 320 is an organic encapsulation layer 300, and the organic encapsulation layer 300 can be prepared by inkjet printing, so that the encapsulation layer 300 has a suitable thickness.

[0082] Optionally, the encapsulation layer 300 may further include a third encapsulation layer 330 located on the side of the second encapsulation layer 320 away from the substrate 100, and the material of the third encapsulation layer 330 includes an inorganic material. That is, the third encapsulation layer 330 is an inorganic encapsulation layer 300, and further adding an inorganic encapsulation layer 300 outside the organic encapsulation layer 300 can further improve the encapsulation effect of the encapsulation layer 300.

[0083] Optionally, the material of the first encapsulation layer 310 is the same as the material of the third encapsulation layer 330 , so that the first encapsulation layer 310 and the third encapsulation layer 330 can be prepared using the same equipment, which can simplify the preparation process of the display panel 10 .

[0084] In some optional embodiments, such as Figure 8 As shown, a buffer layer 340 is disposed on the side of the third encapsulation layer 330 facing away from the substrate 100 .

[0085] In these optional embodiments, the buffer layer 340 can further protect and encapsulate the non-display area NA to increase the effectiveness of the encapsulation. At the same time, the buffer layer 340 can be prepared by inkjet printing to have a suitable thickness.

[0086] Optionally, the buffer layer 340 includes a first sub-portion 341, the first sub-portion 341 is located in the non-display area NA, and at least a portion of the first sub-portion 341 is filled between two adjacent retaining walls 200. The buffer layer 340 can have a suitable thickness, further reducing the step difference between the display area AA and the non-display area NA, while saving process steps.

[0087] Optionally, the buffer layer 340 further includes a second sub-portion 342, and the thickness of the second encapsulation layer 320 decreases in the direction close to the retaining wall 200, so as to form a gap between the second encapsulation layer 320 and the retaining wall 200, and at least part of the second sub-portion 342 is located in the gap. This can reduce the step difference between the second encapsulation layer 320 and the retaining wall 200 closest to the display area AA, further improve the possibility of stress concentration in the gap causing peeling and cracking, and thus improve the encapsulation effect of the display panel 10.

[0088] Optionally, the material of the buffer layer 340 includes an organic material, that is, the buffer layer 340 may be an organic buffer layer 340 . The buffer layer 340 may be prepared by inkjet printing, so that the buffer layer 340 has a suitable thickness.

[0089] In some optional embodiments, such as Fig. 9 As shown, the surface of the third encapsulation layer 330 facing away from the substrate 100 includes a first subsegment 331 and a second subsegment 332, the first subsegment 331 is not covered by the buffer layer 340, the second subsegment 332 is covered by the buffer layer 340, and the first subsegment 331 smoothly transitions to the surface of the buffer layer 340 facing away from the substrate 100.

[0090] In these optional embodiments, the first sub-segment 331 is not covered by the buffer layer 340, and the second sub-segment 332 is covered by the buffer layer 340. A smooth transition is made from the first sub-segment 331 to the surface of the buffer layer 340 facing away from the substrate 100, thereby achieving the continuity of the buffer layer 340 and making the extension height of the buffer layer 340 along the thickness direction Z toward the side facing away from the display area AA decrease in a step-like manner, thereby reducing the step difference between the non-display area NA and the display area AA, and reducing the possibility of the encapsulation layer 300 peeling off and generating cracks due to stress concentration caused by excessive step difference during bending, thereby improving the encapsulation effect of the display panel 10.

[0091] In some optional embodiments, such as Fig. 9 As shown, an insulating layer 400 is further included between the substrate 100 and the encapsulation layer 300. The insulating layer 400 is recessed toward the substrate 100 to form a groove 410. The groove 410 is located on the side of the retaining wall 200 away from the display area AA, and the groove 410 extends along a first direction X. The first direction X is perpendicular to the thickness direction Z and the direction from the display area AA to the non-display area NA.

[0092] In these optional embodiments, the insulating layer 400 is located between the substrate 100 and the encapsulation layer 300, and the insulating layer 400 is recessed toward the substrate 100 to form a groove 410. The groove 410 is located on the side of the retaining wall 200 away from the display area AA. The insulating layer 400 is partially disconnected at the non-display area NA to reduce the stress generated when the display panel 10 is bent, thereby increasing the service life of the display panel 10.

[0093] Optionally, the groove 410 is disposed around the display area AA to reduce stress generated in the non-display area NA and improve the service life of the display panel 10 .

[0094] Optionally, there are multiple grooves 410 , and the multiple grooves 410 can further release the stress generated when the display panel 10 is bent, thereby improving the service life of the display panel 10 .

[0095] Optionally, a plurality of grooves 230 are arranged at intervals along a direction from the display area AA to the non-display area NA to reduce stress between the display area AA and the non-display area NA when the display panel 10 is bent.

[0096] Optionally, the insulating layer 400 may be an organic layer or an inorganic layer. For example, the insulating layer 400 may be at least one of a planarization layer, an interlayer dielectric layer, etc., so as to facilitate the formation of the groove 410 .

[0097] An embodiment of a second aspect of the present application provides a display device, including a display panel 10 .

[0098] The display device provided in the embodiment of the present application includes a display panel 10, and the display panel 10 has a display area AA and a non-display area NA arranged around the display area AA. The display area AA is used to set a light-emitting unit to realize the display function of the display panel 10, and the non-display area NA is used to arrange metal wiring. The display panel 10 includes a substrate 100, a plurality of retaining walls 200 spaced apart on the substrate 100, and an encapsulation layer 300, and the plurality of retaining walls 200 are located in the non-display area NA. When the encapsulation layer 300 includes an organic material, the retaining wall 200 can be used to stop the organic material of the display area AA from overflowing to the non-display area NA. The encapsulation layer 300 includes a plurality of sub-layers, and the sealing effect of the encapsulation layer 300 is improved by setting the plurality of sub-layers. At least one of the plurality of sub-layers extends from the display area AA to the non-display area NA and covers the plurality of retaining walls 200, which can improve the entry of water vapor into the display area AA along the retaining walls and further improve the sealing effect. Among them, among at least two adjacent retaining walls 200, the one closer to the display area AA has a greater extension height in the thickness direction Z of the display panel 10 than the one farther away from the display area AA, thereby reducing the step difference between the non-display area NA and the display area AA, and reducing the possibility of stress concentration and peeling of the encapsulation layer 300 due to excessive step difference during bending, thereby generating cracks, thereby improving the encapsulation effect of the display panel 10.

[0099] The display device in the embodiments of the present application includes but is not limited to mobile phones, personal digital assistants (PDAs), tablet computers, e-books, televisions, access control systems, smart landline phones, consoles, and other devices with display functions.

[0100] An embodiment of a third aspect of the present application provides a mobile terminal, including a display device.

[0101] The mobile terminal provided in the embodiment of the present application includes a display device, and the display device includes a display panel 10. The display panel 10 has a display area AA and a non-display area NA arranged around the display area AA. The display area AA is used to set a light-emitting unit to realize the display function of the display panel 10, and the non-display area NA is used to arrange metal wiring. The display panel 10 includes a substrate 100, a plurality of retaining walls 200 spaced apart on the substrate 100, and an encapsulation layer 300, and the plurality of retaining walls 200 are located in the non-display area NA. When the encapsulation layer 300 includes an organic material, the retaining wall 200 can be used to stop the organic material of the display area AA from overflowing to the non-display area NA. The encapsulation layer 300 includes a plurality of sub-layers, and the sealing effect of the encapsulation layer 300 is improved by setting the plurality of sub-layers. At least one of the plurality of sub-layers extends from the display area AA to the non-display area NA and covers the plurality of retaining walls 200, which can improve the entry of water vapor into the display area AA along the retaining walls and further improve the sealing effect. Among them, among at least two adjacent retaining walls 200, the one closer to the display area AA has a greater extension height in the thickness direction Z of the display panel 10 than the one farther away from the display area AA, thereby reducing the step difference between the non-display area NA and the display area AA, and reducing the possibility of stress concentration and peeling of the encapsulation layer 300 due to excessive step difference during bending, thereby generating cracks, thereby improving the encapsulation effect of the display panel 10.

[0102] The mobile terminal in the embodiment of the present application may be a wearable display product such as a mobile phone, a tablet computer, a smart foldable watch, etc.

[0103] According to the embodiments of the present application as above, these embodiments do not describe all the details in detail, nor do they limit the invention to specific embodiments. Obviously, many modifications and changes can be made based on the above description. This specification selects and specifically describes these embodiments in order to better explain the principles and practical applications of the present application, so that those skilled in the art can make good use of the present application and the modifications based on the present application. The present application is only limited by the claims and their full scope and equivalents.

Claims

1. A display panel, characterized in that: The display panel has a display area and a non-display area surrounding the display area, and the display panel includes: substrate; A plurality of retaining walls are arranged at intervals on the substrate and located in the non-display area, wherein at least two adjacent retaining walls have a height extending in the thickness direction of the display panel from one of the retaining walls close to the display area to a greater extent than one of the retaining walls far from the display area to the thickness direction; The encapsulation layer is disposed on the substrate, and the encapsulation layer includes a plurality of sub-layers, at least one of the sub-layers extends from the display area to the non-display area and covers a plurality of the retaining walls.

2. The display panel according to claim 1, characterized in that: Among any two adjacent ones of the plurality of blocking walls, the extending height of the one close to the display area is greater than the extending height of the one away from the display area.

3. The display panel according to claim 1, characterized in that: The retaining wall includes a first side surface and a second side surface, one of the first side surface faces the display area, and the other faces away from the display area, and a distance between the first side surface and the second side surface gradually decreases in a direction away from the substrate.

4. The display panel according to claim 3, characterized in that: A first preset angle is defined between the first side surface and a reference surface, a second preset angle is defined between the second side surface and the reference surface, the reference surface is perpendicular to the thickness direction, and among the plurality of retaining walls, the first preset angle of the one close to the display area is greater than the first preset angle of the one away from the display area, and / or the second preset angle of the one close to the display area is greater than the second preset angle of the one away from the display area.

5. The display panel according to claim 4, characterized in that: The first preset angle is greater than the second preset angle; Preferably, the first side surface is a curved surface, and the first preset angle is the angle between the tangent plane of the first side surface and the reference plane, and / or the second side surface is a curved surface, and the second preset angle is the angle between the tangent plane of the second side surface and the reference plane.

6. The display panel according to claim 1, characterized in that: The encapsulation layer comprises a first encapsulation layer, a second encapsulation layer and a third encapsulation layer which are sequentially arranged on a side away from the substrate, the second encapsulation layer is located in the display area, and the first encapsulation layer and the third encapsulation layer extend from the display area to the non-display area and cover the retaining wall; Preferably, the first encapsulation layer and the third encapsulation layer are inorganic encapsulation layers; Preferably, the second encapsulation layer is an organic encapsulation layer.

7. The display panel according to claim 6, characterized in that: A buffer layer is provided on a side of the third encapsulation layer facing away from the substrate; Preferably, the buffer layer includes a first sub-portion, the first sub-portion is located in the non-display area, and at least a portion of the first sub-portion is filled between two adjacent retaining walls; Preferably, the buffer layer further includes a second sub-portion, the thickness of the second encapsulation layer decreases in a direction close to the retaining wall to form a gap between the second encapsulation layer and the retaining wall, and at least part of the second sub-portion is located in the gap; Preferably, the material of the buffer layer includes organic material; Preferably, the surface of the third encapsulation layer facing away from the substrate includes a first subsegment and a second subsegment, the first subsegment is not covered by the buffer layer, the second subsegment is covered by the buffer layer, and the first subsegment smoothly transitions to the surface of the buffer layer facing away from the substrate.

8. The display panel according to claim 1, characterized in that: An insulating layer is further provided between the substrate and the encapsulation layer, the insulating layer is recessed toward the substrate to form a groove, the groove is located on a side of the retaining wall away from the display area, and the groove extends along a first direction, the first direction is perpendicular to the thickness direction and the direction from the display area to the non-display area; Preferably, the groove is arranged around the display area; Preferably, there are multiple grooves; Preferably, the plurality of grooves are arranged at intervals along the direction from the display area to the non-display area; Preferably, the insulating layer includes at least one of a planarization layer and an interlayer dielectric layer.

9. A display device, characterized in that: A display panel comprising any one of claims 1 to 8.

10. A mobile terminal, characterized in that: A display device comprising the display device according to claim 9.

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