Display panel and display device

Abstract

The invention relates to the technical field of display, and provides a display panel and a display device.The display panel comprises a display area and a non-display area, the non-display area at least partially surrounds the display area, the display panel further comprises a substrate, an organic insulating layer and a retaining wall, the organic insulating layer is located on one side of the substrate and located in the display area, and the retaining wall is located on the other side of the substrate. The organic insulating layer comprises a first organic insulating layer and a second organic insulating layer, and the second organic insulating layer is located on the side, back to the substrate, of the first organic insulating layer; the retaining wall is located on one side of the substrate and located in the non-display area, and a first through groove is defined by the end, close to the retaining wall, of the first organic insulating layer and the surface of the side, facing the display area, of the retaining wall; the maximum width of the first through groove is a first width, the minimum distance between the end, close to the retaining wall, of the second organic insulating layer and the surface of the side, facing the display area, of the retaining wall is a second width, the first width is smaller than the second width, and the first library width is smaller than 20 micrometers. The display effect of the display panel provided by the invention is improved.

Description

Technical Field

[0001] The present application belongs to the field of display technology, and more specifically, relates to a display panel and a display device. Background Art

[0002] Organic Light Emitting Diode (OLED) display panel is a display device that uses the self-luminous principle of organic light-emitting materials to achieve display; it has the advantages of fast response speed, high brightness, and full viewing angle, making it a very competitive type of display panel with good development prospects.

[0003] However, the display effects of current OLED display products need to be improved. Summary of the invention

[0004] The present application provides a display panel and a display device to improve the display effect of the display panel at least to a certain extent.

[0005] To achieve the above-mentioned purpose, the technical solution adopted in the present application is as follows: in the first aspect, a display panel is provided, the display panel comprising a display area and a non-display area, the non-display area at least partially surrounding the display area, the display panel further comprising a substrate, an organic insulating layer and a retaining wall, the organic insulating layer is located on one side of the substrate and in the display area, the organic insulating layer comprises a first organic insulating layer and a second organic insulating layer, the second organic insulating layer is located on the side of the first organic insulating layer facing away from the substrate; the retaining wall is located on one side of the substrate and in the non-display area, at least a portion of the retaining wall is arranged surrounding the display area, and a first through groove is formed between an end of the first organic insulating layer close to the retaining wall and a surface of the retaining wall facing the display area;

[0006] Among them, along the direction parallel to the plane where the substrate is located, the maximum width of the first through groove is a first width, the minimum distance between an end of the second organic insulating layer close to the retaining wall and a side surface of the retaining wall facing the display area is a second width, the first width is smaller than the second width and the first width is smaller than 20μm.

[0007] In the display panel provided in the embodiment of the present application, the space formed between the organic insulating layer and the retaining wall can be used to accommodate the packaging material in the subsequent process to achieve effective packaging of the display area. By adjusting the distribution range of the second organic insulating layer, the first width (i.e., the maximum width of the first through groove) is reduced, and the first width is made less than 20 μm, while ensuring that the second width indicating the distance between the second organic insulating layer and the retaining wall is always greater than the first width indicating the size of the first through groove. At this time, the purpose of reducing the border width of the display area can be achieved by reducing the width of the first through groove to less than 20 μm without changing the arrangement position of the retaining wall, that is, without changing the size of the display panel, thereby achieving the purpose of improving the display effect and visual effect of the display panel.

[0008] Optionally, an orthographic projection outer contour of the second organic insulating layer on the substrate is located within an orthographic projection outer contour of the first organic insulating layer on the substrate.

[0009] Optionally, an absolute value of a difference between the first width and the second width is greater than 5 μm.

[0010] Optionally, the second width is greater than 25 μm.

[0011] Optionally, the first width is not less than 5 μm.

[0012] Optionally, the second width is not greater than 55 μm;

[0013] Optionally, the material of the second organic insulating layer includes an organic material, and / or the material of the first organic insulating layer includes an organic material.

[0014] Optionally, the organic insulating layer further includes a third organic insulating layer, the third organic insulating layer is located on a side of the first organic insulating layer facing away from the second organic insulating layer, and the first organic insulating layer covers a surface of the third organic insulating layer facing away from the substrate.

[0015] Optionally, the first organic insulating layer covers a side wall surface of one end of the third organic insulating layer pointing to the retaining wall.

[0016] Optionally, the material of the third organic insulating layer includes organic material.

[0017] Optionally, the second organic insulating layer is provided with a second through groove.

[0018] Optionally, the number of the second through grooves is at least two.

[0019] Optionally, the display panel further includes a first encapsulation layer, and the first encapsulation layer is disposed on a side of the retaining wall facing the display area and covers the first through groove.

[0020] Optionally, an orthographic projection of the organic insulating layer on the substrate is located within an orthographic projection of the first encapsulation layer on the substrate.

[0021] Optionally, the material of the first encapsulation layer includes organic material.

[0022] Optionally, the display panel further includes a second encapsulation layer, and the second encapsulation layer is located on a side of the first encapsulation layer facing the substrate;

[0023] The second encapsulation layer extends from the display area to the non-display area, and an orthographic projection of the second encapsulation layer on the substrate covers an orthographic projection of the first encapsulation layer on the substrate and an orthographic projection of the retaining wall on the substrate.

[0024] Optionally, the material of the second encapsulation layer includes an inorganic material.

[0025] Optionally, the display panel further includes a third encapsulation layer, and the third encapsulation layer is located on a side of the first encapsulation layer facing away from the substrate;

[0026] The third encapsulation layer extends from the display area to the non-display area, and an orthographic projection of the third encapsulation layer on the substrate covers an orthographic projection of the first encapsulation layer on the substrate and an orthographic projection of the retaining wall on the substrate.

[0027] Optionally, an orthographic projection of the third encapsulation layer on the substrate covers an orthographic projection of the second encapsulation layer on the substrate.

[0028] Optionally, the material of the third encapsulation layer includes an inorganic material.

[0029] Optionally, the display panel further includes a light-emitting functional layer, the light-emitting functional layer is located on a side of the organic insulating layer facing away from the substrate, and the first encapsulation layer covers a surface of the light-emitting functional layer facing away from the substrate.

[0030] Optionally, along the thickness direction of the substrate, a driving circuit layer is provided between the second organic insulating layer and the substrate, and an orthographic projection outer contour of the driving circuit layer on the substrate is located within an orthographic projection outer contour of the second organic insulating layer on the substrate.

[0031] Optionally, the light-emitting functional layer includes an anode layer, and the anode layer covers a side of the second organic insulating layer facing away from the substrate.

[0032] In a second aspect, the present application further provides a display device, comprising any of the display panels described above.

[0033] The display device provided in the embodiment of the present application includes the above-mentioned display panel, so the display device at least includes the beneficial effects of any one or several of the above-mentioned display panels. The specific effects are described above and will not be repeated here.

[0034] The display panel and display device provided by the present application have the following beneficial effects: compared with the related art, the display panel provided by the present application can achieve the compression of the size of the first through groove in the direction parallel to the plane where the substrate is located without reducing the size of the space used to accommodate the packaging material by adjusting the distribution range of the first organic insulating layer and the second organic insulating layer to be different and the distribution range of the first organic insulating layer is larger than the distribution range of the second organic insulating layer, thereby taking into account the two requirements of the narrow frame of the display panel and preventing the overflow of the packaging material without changing the relevant process technology. This solution can effectively reduce the size of the non-display area of ​​the display panel without increasing the difficulty of the processing technology, and effectively improve the display effect and visual viewing effect of the display panel. BRIEF DESCRIPTION OF THE DRAWINGS

[0035] In order to more clearly illustrate the technical solutions in the embodiments of the present application, the drawings required for use in the embodiments or the description of the prior art 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 paying any creative work.

[0036] Figure 1 is a schematic diagram of the structure of a display panel in the related art;

[0037] Figure 2 A schematic diagram of the planar structure of a display panel provided in an embodiment of the present application;

[0038] Figure 3 for Figure 2 The AA cross-sectional view of the display panel shown;

[0039] Figure 4 for Figure 3 A magnified view of the structure in the middle B area;

[0040] Figure 5 for Figure 2 Another AA cross-sectional view of the display panel shown;

[0041] Figure 6 for Figure 2 Another AA cross-sectional view of the display panel shown;

[0042] Figure 7 A schematic diagram of the planar structure of a display device provided in an embodiment of the present application.

[0043] Among them, the reference numerals in the figure are:

[0044] 1. substrate; 2. organic insulating layer; 21. first organic insulating layer; 22. second organic insulating layer; 2201. second through-groove; 24. third organic insulating layer; 3. retaining wall; 4. first through-groove; 5. first encapsulation layer; 6. second encapsulation layer; 7. third encapsulation layer; 8. light-emitting functional layer; 81. anode layer; 9. driving circuit layer;

[0045] 10. Display panel; 110. Display area; 120. Non-display area; 100. Display device. DETAILED DESCRIPTION

[0046] In order to make the technical problems, technical solutions and beneficial effects to be solved by the present application more clearly understood, the present application is further described in detail below in conjunction with the accompanying drawings and embodiments. It should be understood that the specific embodiments described herein are only used to explain the present application and are not used to limit the present application.

[0047] It should be noted that when an element is referred to as being "fixed to" or "disposed on" another element, it can be directly on the other element or indirectly on the other element. When an element is referred to as being "connected to" another element, it can be directly connected to the other element or indirectly connected to the other element.

[0048] In the description of the present application, it should be understood that the terms "center", "longitudinal", "lateral", "length", "width", "thickness", "up", "down", "front", "back", "left", "right", "vertical", "horizontal", "top", "bottom", "inside", "outside", "clockwise", "counterclockwise", "axial", "radial", "circumferential" and the like 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, and do not indicate or imply that the referred device or element must have a specific orientation, be constructed and operated in a specific orientation, and therefore should not be understood as a limitation on the present application.

[0049] In addition, the terms "first" and "second" are used for descriptive purposes only and should not be understood as indicating or implying relative importance or implicitly indicating the number of the indicated technical features. Thus, a feature defined as "first" or "second" may explicitly or implicitly include one or more of the features. In the description of this application, the meaning of "plurality" is two or more, unless otherwise clearly and specifically defined.

[0050] In this application, unless otherwise clearly specified and limited, the terms "installed", "connected", "connected", "fixed" and the like 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, an electrical connection, or communication with each other; it can be a direct connection, or an indirect connection through an intermediate medium, it can be the internal connection of two elements or the interaction relationship between two elements, unless otherwise clearly defined. For ordinary technicians in this field, the specific meanings of the above terms in this application can be understood according to specific circumstances.

[0051] In the present application, unless otherwise clearly specified and limited, a first feature being “above” or “below” a second feature may mean that the first and second features are in direct contact, or the first and second features are in indirect contact through an intermediate medium. Moreover, a first feature being “above”, “above”, and “above” a second feature may mean that the first feature is directly above or obliquely above the second feature, or simply means that the first feature is higher in level than the second feature. A first feature being “below”, “below”, and “below” a second feature may mean that the first feature is directly below or obliquely below the second feature, or simply means that the first feature is lower in level than the second feature.

[0052] In the present application, the terms "one embodiment", "some embodiments", "example", "specific example", or "some examples" etc. mean that the specific features, structures, materials or characteristics described in conjunction with the embodiment or example are included in at least one embodiment or example of the present application. In this specification, the schematic representations of the above terms do not necessarily refer to the same embodiment or example. Moreover, the described specific features, structures, materials or characteristics may be combined in any one or more embodiments or examples in a suitable manner. In addition, those skilled in the art may combine and combine the different embodiments or examples described in this specification and the features of the different embodiments or examples, without contradiction.

[0053] The term "substrate" used in the text refers to a material on which a subsequent material layer is added, which is used to provide a bearing matrix for the layers above it. In some embodiments, the substrate can be flexible, stretchable, foldable, bendable or rollable, so that the display panel can be flexible, stretchable, foldable, bendable or rollable. The material of the substrate can be formed by any suitable insulating material with flexibility, such as polyimide (PI), polycarbonate (English name, P), polyether sulfone (English name, PES), and can also be formed by polymer materials such as polyethylene terephthalate (PET), polyethylene naphthalate (English name, PEN), polyarylate (English name, PR) or glass fiber reinforced plastic (English name, FRP). The substrate can be transparent, translucent or opaque. In some other embodiments, the substrate can also be hard, made of hard insulating materials, such as metal, ultra-thin glass, plastic or sapphire wafer. The substrate itself can be patterned. The material added to the substrate may be patterned, or may remain unpatterned.

[0054] The term "layer" or "element" used herein may refer to a structural layer or functional layer composed of different materials constituting the display panel structure, having a certain thickness and covering a certain area. A layer or element may extend over a complete layer or element structure located below or above, or have a smaller range than the layer or element structure located below or above. It should be noted that in the accompanying drawings, the sizes of layers and regions may be exaggerated for clarity of illustration. It is also understood that when a layer or element is referred to as "on" another layer or element, it may be directly on the other layer or element, or there may be a layer located between the two structures. In addition, it is understood that when a layer or element is referred to as "under" another layer or element, it may be directly under the other layer or element, or there may be more than one intermediate layer or element. It is also understood that when a layer or element is referred to as "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. In addition, a layer or element may be a region of a homogeneous or non-homogeneous continuous structure, the thickness of which is less than the thickness of the continuous structure. For example, a layer may be located between the top and bottom surfaces of the continuous structure or between any paired lateral planes at the top and bottom surfaces. A layer may extend laterally, vertically and / or along a tapered surface. A substrate may be a layer, and one or more layers may be included therein. For example, an interconnect layer may include one or more conductors and contact layers (in which contacts, interconnects and / or vias are formed) and one or more dielectric layers.

[0055] The term "and / or" in this application is only a description of the association relationship of associated objects, indicating that there can be three relationships. For example, A and / or B can represent: A exists alone, A and B exist at the same time, and B exists alone. In addition, the character " / " in this application generally indicates that the associated objects before and after are in an "or" relationship.

[0056] In the related art, an organic insulating film layer 2' is generally provided in the display area 110' of the display panel 10' to support the light-emitting element and to play a certain insulating role between the light-emitting element and the substrate 1'. In order to prevent corrosion by water, oxygen, etc., a certain distance is generally provided between the organic insulating film layer 2' and the retaining wall 3' located in the non-display area 120' to form a groove 4'. In the subsequent process, the encapsulation layer 5' can fill the groove 4' to effectively encapsulate the display area 110' of the display panel 10', please refer to Figure 1 .

[0057] With the development of technology, people have gradually higher requirements for the border part of the display panel. The current research and development direction tends to narrow the width of the border (i.e., the non-display area 120'), that is, to pursue a narrow border. In order to achieve this effect, it is generally necessary to directly compress the width of the groove 4' used to match the encapsulation layer 5' as mentioned above. However, this will affect other performances of the display panel, for example, it will reduce the encapsulation effect of the display panel. Once the encapsulation material overflows or the filling amount of the encapsulation material is insufficient, the encapsulation and even panel failure problems are likely to occur.

[0058] Based on this, the embodiment of the present application provides a display panel 10 and a display device 100 to alleviate or improve the above technical problems at least to a certain extent.

[0059] The embodiment of the present application provides a display panel 10, which includes a display area 110 and a non-display area 120, wherein at least a portion of the non-display area 120 is disposed around the display area 110. Of course, in the case where the display panel 10 is a perforated panel, the perforated area is also the non-display area 120, and the display area 110 is disposed around a portion of the non-display area 120.

[0060] For example, see Figure 2 The structure of the display panel 10 is further described below by taking the non-display area 120 as a border area surrounding the display area 110 as an example.

[0061] Specifically, the display panel 10 includes a substrate 1, an organic insulating layer 2 and a retaining wall 3. The organic insulating layer 2 is located on one side of the substrate 1 and in the display area 110. The organic insulating layer 2 is a stacked structure, including a first organic insulating layer 21 and a second organic insulating layer 22 stacked in layers. The second organic insulating layer 22 is located on the side of the first organic insulating layer 21 facing away from the substrate 1; the retaining wall 3 is located on one side of the substrate 1 and in the non-display area 120. The retaining wall 3 is at least partially arranged around the display area 110, and a first through groove 4 is formed between one end of the first organic insulating layer 21 close to the retaining wall 3 and the surface of the retaining wall 3 facing the display area 110.

[0062] See also Figure 3 , the orthographic outer contour of the second organic insulating layer 22 on the substrate 1 is located within the orthographic outer contour of the first organic insulating layer 21 on the substrate 1, so that the surface of the first organic insulating layer 21 on the side facing away from the substrate 1 is partially covered by the second organic insulating layer 22, and partially exposed relative to the second organic insulating layer 22. At least a portion of the surface of the first organic insulating layer 21 exposed relative to the second organic insulating layer 22 is closer to the retaining wall 3 than the unexposed area.

[0063] In this embodiment, the outer contour refers to the projection of the outer peripheral edge of the film layer on the substrate. The orthographic projection outer contour of the second organic insulating layer 22 on the substrate 1 is located within the orthographic projection outer contour of the first organic insulating layer 21 on the substrate 1, which means that the orthographic projection outer contour of the second organic insulating layer 22 on the substrate 1 falls within the closed graphic area enclosed by the orthographic projection outer contour of the first organic insulating layer 21 on the substrate 1.

[0064] The portion of the first organic insulating layer 21 that is exposed relative to the second organic insulating layer 22 and that faces away from the substrate 1 may cooperate with the first through groove 4 and be used to support and contain packaging materials in subsequent manufacturing processes.

[0065] See also Figure 3 , along a direction parallel to the plane where the substrate 1 is located, the maximum width of the first through groove 4 is the first width, the minimum distance between an end of the second organic insulating layer 22 pointing to the retaining wall 3 and a side surface of the retaining wall 3 facing the display area 110 is the second width, the first width is smaller than the second width and the first width is smaller than 20 μm.

[0066] It should be noted that the first width and the second width both correspond to the same area of ​​the retaining wall 3. The retaining wall 3 is arranged around the display area 110. At this time, there is a first through groove 4 between a section of the first organic insulating layer 21 pointing to the retaining wall 3 and a side surface of the retaining wall 3 facing the display area 110, and the maximum width of the first through groove 4 is the first width; accordingly, the minimum distance between the same surface of the second organic insulating layer 22 pointing to the retaining wall 3 is the second width, see Figure 2 and Figure 3 .

[0067] Since the first width is always smaller than the second width, along the extending direction of the retaining wall 3 , the outer contour of the second organic insulating layer 22 close to one end of the retaining wall 3 is always located inside the outer contour of the first organic insulating layer 21 .

[0068] It can be understood that the space formed between the organic insulating layer 2 and the retaining wall 3 is used to accommodate the packaging material in the subsequent process to achieve effective packaging of the display area 110 .

[0069] Under the premise of not changing the size of the space formed by the cooperation of the relevant film layers for accommodating the packaging material, the smaller the size of the first through groove 4 formed between the first organic insulating layer 21 and the retaining wall 3, that is, the smaller the first width, means that the width of the frame area of ​​the display panel 10 is smaller at this time, which is manifested as a narrowing of the width of the non-display area 120. At this time, the area proportion of the display area 110 in the display panel 10 on the display panel 10 is increased, which is manifested as the display panel 10 has a better visual effect and display effect.

[0070] By adjusting the distribution range of the second organic insulating layer 22, the first width (i.e., the maximum width of the first through groove 4) can be reduced while ensuring that the second width is always greater than the first width, so as to improve the display effect and visual effect of the display panel 10 by adjusting the width of the first through groove 4 to be less than 20 μm without changing the arrangement position of the retaining wall 3.

[0071] It should be noted that, in this embodiment, the area corresponding to the first through groove 4 belongs to the non-display area 120 .

[0072] In some embodiments, the absolute value of the difference between the first width and the second width may be set to be greater than 5 μm.

[0073] Since the first width is always smaller than the second width, the absolute value of the difference between the first width and the second width can be made greater than 5 μm by increasing the second width. At this time, relative to the outer edge of the first organic insulating layer 21 pointing to the side of the retaining wall 3, the side of the second organic insulating layer 22 pointing to the retaining wall 3 is appropriately moved inward toward the middle of the display area 110, which can ensure that the size of the space for accommodating the packaging material is not reduced, and can even be increased to a certain extent, so as to improve the influence of narrowing the width of the non-display area 120 on the packaging process and packaging effect, and improve the display effect of the display panel 10 while also improving the reliability and performance of the display panel 10.

[0074] By adjusting the end of the second organic insulating layer 22 pointing to the retaining wall 3 to move inward toward the middle of the display area 110 relative to the end of the first organic insulating layer 21 pointing to the retaining wall 3, the maximum width of the first through groove 4 can be reduced without reducing the above space. Finally, without changing the arrangement position of the retaining wall 3, that is, without changing the size of the display panel 10, it is helpful to reduce the frame width of the display area 110, thereby achieving the purpose of improving the display effect and visual effect of the display panel 10.

[0075] Specifically, the first width of the first through groove 4 may be reduced, while the second width is increased.

[0076] See also Figure 3 After the second organic insulating layer 22 is appropriately moved inward relative to the retaining wall 3 toward the middle of the display area 110 , the width of the non-display area 120 can be narrowed by reducing the first width.

[0077] Considering that the display area 110 has the function of emitting light when powered on, in order to ensure the normal operation of the display area 110 and prevent the inwardly moved second organic insulating layer 22 from affecting the light-emitting function of the display area 110 , it needs to be limited.

[0078] The display panel 10 further includes a light-emitting functional layer 8, which is located on the side of the organic insulating layer 2 facing away from the substrate 1. The encapsulation material covers the surface of the light-emitting functional layer 8 facing away from the substrate 1 to encapsulate the light-emitting functional layer 8 and prevent the material from corroding the light-emitting functional layer 8 by water and oxygen.

[0079] At the same time, the display panel 10 also includes a driving circuit layer 9 connected to the light-emitting functional layer 8 and used to control the signal conduction of the light-emitting functional layer 8. The driving circuit layer 9 is located on the side of the second organic insulating layer 22 facing away from the light-emitting functional layer 8, and the orthographic projection outer contour of the driving circuit layer 9 on the substrate 1 is located within the orthographic projection outer contour of the second organic insulating layer 22 on the substrate 1. Figure 4 .

[0080] In some embodiments, the driving circuit layer 9 may be disposed between the second organic insulating layer 22 and the substrate 1 , or may be further disposed between the second organic insulating layer 22 and the first organic insulating layer 21 .

[0081] When the second organic insulating layer 22 moves inwardly toward the middle of the display area 110 relative to the retaining wall 3, it is necessary to ensure that the second organic insulating layer 22 always covers the driving circuit layer 9 and ensures that the driving circuit layer 9 and the light-emitting functional layer 8 will not be conductively connected on the side of the second organic insulating layer 22 pointing to the retaining wall 3, so as not to affect the normal operation of the driving circuit layer 9 and the light-emitting functional layer 8.

[0082] In some embodiments, the light-emitting functional layer 8 includes an anode layer 81 , and the anode layer 81 is in contact with a surface of the second organic insulating layer 22 that is opposite to the substrate 1 .

[0083] The anode layer 81 covers the surface of the second organic insulating layer 22 facing away from the substrate 1 and the side of the second organic insulating layer 22 facing the end of the retaining wall 3. At this time, the second organic insulating layer 22 is used to block the anode layer 81 and the driving circuit layer 9, see Figure 4 The second organic insulating layer 22 is made of insulating material. Of course, the light-emitting functional layer 8 includes a cathode layer and a light-emitting material layer in addition to the anode layer 81, which will not be described in detail here.

[0084] Exemplarily, the driving circuit layer 9 may include a gate switch circuit (Gate On Array, GOA) of a thin film transistor, and may also include a dimming circuit (Emission circuit, EM) for controlling the light-emitting time of the light-emitting functional layer 8. The specific structure and function of the above circuits, as well as the conduction position and conduction method with the light-emitting functional layer 8, have been disclosed in the relevant technology and will not be repeated here.

[0085] On the premise that the distribution range and distribution area of ​​the above-mentioned driving circuit layer 9 remain unchanged, the distribution range of the second organic insulating layer 22 and the maximum value of the second width can be limited by this range, that is, to ensure that the orthographic projection of the driving circuit layer 9 on the substrate 1 is always within the orthographic projection range of the second organic insulating layer 22 on the substrate 1, so as to achieve the limitation of the maximum range of the inward movement of the end of the second organic insulating layer 22 relative to the retaining wall 3 toward the middle of the display area 110.

[0086] See also Figure 3 , the absolute value of the difference between the first width and the second width is greater than 5 μm.

[0087] Specifically, the first width is less than 20 μm, and the second width is greater than 25 μm.

[0088] In some embodiments, the first width may be limited to be no less than 5 μm.

[0089] Specifically, the first width ranges from 5 μm to 19 μm.

[0090] For example, the first width may be any value of 5 μm, 7 μm, 9 μm, 11 μm, 13 μm, 15 μm, 17 μm, 19 μm, etc., or other values ​​not listed but within the range. The specific numerical range can be adaptively adjusted according to actual design requirements.

[0091] In other embodiments, the second width may be limited to be no greater than 55 μm.

[0092] For example, the second width may be any value of 25 μm, 30 μm, 35 μm, 40 μm, 45 μm, 50 μm, 55 μm, etc., or other values ​​not listed but within the range. The specific numerical range can be adaptively adjusted according to actual design requirements.

[0093] In some embodiments, the material of the second organic insulating layer 22 includes an organic material, and / or the material of the first organic insulating layer 21 includes an organic material.

[0094] Of course, there may be other film structures between the second organic insulating layer 22 and the first organic insulating layer 21. The other film formed between the first organic insulating layer 21 and the second organic insulating layer 22 may be a film layer including at least one of an inorganic material and a metal material. Its structure and use have been disclosed in the relevant art and will not be repeated here.

[0095] See also Figure 4 , Figure 4 The first organic insulating layer 21 and the second organic insulating layer 22 are drawn as single-layer structures for illustration only. In actual preparation, the first organic insulating layer 21 is a laminated structure made of different materials, and the second organic insulating layer 22 can be a single-layer structure or a laminated structure.

[0096] See also Figure 3 and Figure 4 In some embodiments, the organic insulating layer 2 further includes a third organic insulating layer 24 .

[0097] The third organic insulating layer 24 is located on a side of the first organic insulating layer 21 facing away from the second organic insulating layer 22 , and the first organic insulating layer 21 covers a surface of the third organic insulating layer 24 facing away from the substrate 1 .

[0098] During actual preparation, the distribution range of the third organic insulating layer 24 is slightly smaller than that of the first organic insulating layer 21 . Therefore, the side of the third organic insulating layer 24 pointing to the retaining wall 3 is covered by the first organic insulating layer 21 .

[0099] Specifically, the first organic insulating layer 21 covers the side wall surface of one end of the third organic insulating layer 24 pointing to the retaining wall 3 .

[0100] In the embodiment of the present application, the material of the third organic insulating layer 24 includes organic material. Figure 3 and Figure 4 The single-layer third organic insulating layer 24 is only for illustration. In actual preparation, the third organic insulating layer 24 is a stacked structure made of different materials.

[0101] Similarly, there may be other film structures between the third organic insulating layer 24 and the first organic insulating layer 21. The other film formed between the first organic insulating layer 21 and the third organic insulating layer 24 may be a film layer including at least one of an inorganic material and a metal material. Its structure and use have been disclosed in the relevant art and will not be described in detail here.

[0102] In some embodiments, the display panel 10 includes a first encapsulation layer 5 , which is disposed on a side of the retaining wall 3 facing the display area 110 and covers the first through groove 4 .

[0103] See also Figure 3 The first encapsulation layer 5 may not only cover the first through groove 4 formed between the first organic insulating layer 21 and the retaining wall 3 , but also cover the area of ​​the first organic insulating layer 21 that is exposed relative to the second organic insulating layer 22 on the side surface facing away from the substrate 1 .

[0104] Specifically, the first encapsulation layer 5 covers the surface of the light-emitting functional layer 8 which is opposite to the substrate 1 , so as to achieve encapsulation of the light-emitting functional layer 8 .

[0105] For example, the total amount of packaging material constituting the first packaging layer 5 is 134 μm 3 , the first width is 5μm, and the second width is 55μm. When the structures such as the second organic insulating layer 22 and the retaining wall 3 remain unchanged, only reducing the first width will cause part of the encapsulation material constituting the first encapsulation layer 5 to overflow relative to the retaining wall 3; at this time, under the premise of not changing the structure of the retaining wall 3 and not changing the total amount of encapsulation material constituting the first encapsulation layer 5, increasing the second width can make the excess encapsulation material fill the space enclosed by the second organic insulating layer 22, the first organic insulating layer 21 and the retaining wall 3, so as to overcome the overflow problem of the encapsulation material.

[0106] Specifically, the orthographic projection of the organic insulating layer 2 on the substrate 1 is located within the orthographic projection of the first encapsulation layer 5 on the substrate 1 .

[0107] In order to further improve the encapsulation effect of the first encapsulation layer 5 , in some embodiments, the material used to form the first encapsulation layer 5 includes an organic material.

[0108] For example, the first encapsulation layer 5 may be prepared by inkjet printing (IJP) technology. The first encapsulation layer 5 prepared by IJP can achieve uniform spreading of the film layer, and has good leveling performance, can effectively cover and fill the uneven complex film layer morphology formed by the inner retreat of the first organic insulating layer 21 and the second organic insulating layer 22, improve the flatness of the surface of the display panel 10, and help improve the encapsulation effect and reliability of the display panel 10.

[0109] See also Figure 3 The display panel 10 further includes a second encapsulation layer 6 and a third encapsulation layer 7 , and the first encapsulation layer 5 is located between the second encapsulation layer 6 and the third encapsulation layer 7 .

[0110] Specifically, the second encapsulation layer 6 is located on a side of the first encapsulation layer 5 facing the substrate 1 .

[0111] The second encapsulation layer 6 extends from the display area 110 to the non-display area 120 , and the orthographic projection of the second encapsulation layer 6 on the substrate 1 covers the orthographic projection of the first encapsulation layer 5 on the substrate 1 and the orthographic projection of the retaining wall 3 on the substrate 1 .

[0112] The second encapsulation layer 6 also covers the first through groove 4. The first encapsulation layer 5 is located on the side of the second encapsulation layer 6 facing away from the substrate 1 and fills the first through groove 4.

[0113] In some embodiments, the material of the second encapsulation layer 6 includes an inorganic material.

[0114] In some embodiments, the second encapsulation layer 6 can be prepared by chemical vapor deposition (CVD).

[0115] The second encapsulation layer 6 prepared by chemical vapor deposition technology has good adhesion and step coverage ability, and can better cover the surface of the film layer with complex morphology, so as to ensure that the surface of the prepared display panel 10 can be uniformly encapsulated and protected.

[0116] In addition, the film layer prepared by chemical vapor deposition technology also has the advantages of relatively uniform thickness and good density, which can effectively block the intrusion of external water vapor, oxygen, impurities, etc., and help improve the stability and reliability of the device.

[0117] After the first through groove 4, the organic insulating layer 2, the retaining wall 3 and other structures are covered by the second encapsulation layer 6 on the side facing away from the substrate 1, the first encapsulation layer 5 is prepared on the side facing away from the substrate 1 of the second encapsulation layer 6 to fill and cover the surface of the second encapsulation layer 6, so as to achieve a better encapsulation effect.

[0118] The third encapsulation layer 7 is located on the side of the first encapsulation layer 5 facing away from the substrate 1, and also extends from the display area 110 to the non-display area 120. The orthographic projection of the third encapsulation layer 7 on the substrate 1 covers the orthographic projection of the first encapsulation layer 5 on the substrate 1 and the orthographic projection of the retaining wall 3 on the substrate 1.

[0119] The distribution range of the third encapsulation layer 7 on the display panel 10 is substantially consistent with the distribution range of the second encapsulation layer 6. In some embodiments, the orthographic projection of the third encapsulation layer 7 on the substrate 1 covers the orthographic projection of the second encapsulation layer 6 on the substrate 1, or the orthographic projection of the third encapsulation layer 7 on the substrate 1 coincides with the orthographic projection of the second encapsulation layer 6 on the substrate 1, or the orthographic projection of the third encapsulation layer 7 on the substrate 1 coincides with the orthographic projection of the second encapsulation layer 6 on the substrate 1 at least partially.

[0120] See also Figure 3 Above the side surface of the retaining wall 3 facing away from the substrate 1 , the side surface of the second encapsulation layer 6 facing away from the substrate 1 is in contact with the side surface of the third encapsulation layer 7 facing the substrate 1 .

[0121] In order to further improve the preparation diversity of the space for accommodating the packaging material, in some embodiments, the second organic insulating layer 22 is provided with a second through groove 2201 .

[0122] See also Figure 5 The second through groove 2201 is a through structure that penetrates the second organic insulating layer 22 along the thickness direction of the substrate 1 , and the orthographic projection of the second through groove 2201 on the substrate 1 is located within the outer contour of the orthographic projection of the second organic insulating layer 22 on the substrate 1 .

[0123] In other similar embodiments, the second through-groove 2201 may be set as an opening structure extending from the side surface of the second organic insulating layer 22 facing away from the substrate toward the side surface close to the substrate 1 along the thickness direction of the substrate 1, and the opening structure may be a non-penetrating structure. In this case, the thickness of the second organic insulating layer 22 located in the orthographic projection area of ​​the second through-groove 2201 on the substrate 1 is reduced to a certain extent relative to the second organic insulating layer located in other areas.

[0124] In some embodiments, the number of the second through-grooves 2201 is at least one; in other embodiments, the number of the second through-grooves 2201 may also be two or more. When the number of the second through-grooves 2201 is at least two, the orthographic projections of the plurality of second through-grooves 2201 on the substrate 1 are arranged at intervals.

[0125] The second through groove 2201 can be obtained by patterning and etching the second organic insulating layer 22 .

[0126] Exemplarily, the second organic insulating layer 22 may be patterned and etched by yellow light photolithography or other similar methods to prepare the second through groove 2201 on the second organic insulating layer 22 .

[0127] Taking the second through groove 2201 penetrating the second organic insulating layer 22 as an example, the second through groove 2201 may include regularly or irregularly distributed dot grooves, strip grooves, block grooves, etc., or may be annular grooves nested in sequence. The through grooves cooperate with each other to improve the fluidity of the encapsulation material constituting the first encapsulation layer 5 within a certain range, so as to help improve its leveling effect within a certain range, thereby improving the flatness of the surface of the prepared first encapsulation layer 5 on the side facing away from the substrate 1. In addition, since the fluidity of the encapsulation material is enhanced, the structural design can also improve the preparation efficiency of the first encapsulation layer 5 to a certain extent.

[0128] The above-mentioned patterning process can adjust the second width formed between the second organic insulating layer 22 and the retaining wall 3, see Figure 5 At this time, one end of the second organic insulating layer 22 close to the retaining wall 3 moves moderately inward toward the middle of the display area 110 relative to the first organic insulating layer 21 .

[0129] In other similar embodiments, the above-mentioned patterning process may be set to etch only the non-edge region of the second organic insulating layer 22, and in this case, the size of the second width formed between the second organic insulating layer 22 and the retaining wall 3 does not change. Figure 6 , the dimension (ie, the second width) of the second organic insulating layer 22 in the organic insulating layer 2 toward the barrier wall 3 does not change (at this time, the absolute value of the difference between the first width and the second width may be equal to or less than 5 μm).

[0130] Based on the same inventive concept, the embodiment of the present application further provides a display device 100, including any of the display panels 10 described above, see Figure 7 .

[0131] Regarding the specific structure of the display panel 10 , please refer to the specific description in the aforementioned embodiment, which will not be repeated here.

[0132] The display device 100 provided in this embodiment can be a mobile phone, a notebook, a tablet computer, a smart watch, a smart bracelet, a navigator, a display, a personal digital assistant (PDA), and other products or components with display functions.

[0133] Since the display device 100 has the above-mentioned display panel 10 , the display device 100 at least includes the beneficial effects of any one or several of the above-mentioned display panels 10 . The specific effects are described above and will not be repeated here.

[0134] The above description is only a preferred embodiment of the present application and is not intended to limit the present application. Any modifications, equivalent substitutions and improvements made within the spirit and principles of the present application should be included in the protection scope of the present application.

Claims

1. A display panel, characterized in that: The display panel (10) comprises a display area (110) and a non-display area (120), wherein the non-display area (120) at least partially surrounds the display area (110), and the display panel (10) further comprises: Substrate (1); an organic insulating layer (2), located on one side of the substrate (1) and located in the display area (110), the organic insulating layer (2) comprising a first organic insulating layer (21) and a second organic insulating layer (22), the second organic insulating layer (22) being located on a side of the first organic insulating layer (21) facing away from the substrate (1); A retaining wall (3) is located on one side of the substrate (1) and in the non-display area (120); at least a portion of the retaining wall (3) is arranged around the display area (110); an end of the first organic insulating layer (21) close to the retaining wall (3) and a surface of the retaining wall (3) facing the display area (110) form a first through groove (4); Wherein, along a direction parallel to the plane where the substrate (1) is located, the maximum width of the first through groove (4) is a first width, the minimum distance between an end of the second organic insulating layer (22) close to the retaining wall (3) and a surface of a side of the retaining wall (3) facing the display area (110) is a second width, the first width is smaller than the second width and the first width is smaller than 20 μm.

2. The display panel according to claim 1, characterized in that: An orthographic projection outer contour of the second organic insulating layer (22) on the substrate (1) is located within an orthographic projection outer contour of the first organic insulating layer (21) on the substrate (1).

3. The display panel according to claim 1, characterized in that: The absolute value of the difference between the first width and the second width is greater than 5 μm; Preferably, the second width is greater than 25 μm; Preferably, the first width is not less than 5 μm; Preferably, the second width is not greater than 55 μm; Preferably, the material of the second organic insulating layer (22) includes an organic material, and / or the material of the first organic insulating layer (21) includes an organic material; Preferably, the organic insulating layer (2) further comprises a third organic insulating layer (24), the third organic insulating layer (24) being located on a side of the first organic insulating layer (21) facing away from the second organic insulating layer (22), and the first organic insulating layer (21) covering a surface of the third organic insulating layer (24) facing away from the substrate (1); Preferably, the first organic insulating layer (21) covers the side wall surface of one end of the third organic insulating layer (24) pointing toward the retaining wall (3); Preferably, the material of the third organic insulating layer (24) comprises organic material.

4. The display panel according to any one of claims 1 to 3, characterized in that: The second organic insulating layer (22) is provided with a second through groove (2201); Preferably, the number of the second through grooves (2201) is at least two.

5. The display panel according to claim 1, characterized in that: The display panel (10) further comprises a first encapsulation layer (5), wherein the first encapsulation layer (5) is arranged on a side of the retaining wall (3) facing the display area (110) and covers the first through groove (4); Preferably, the orthographic projection of the organic insulating layer (2) on the substrate (1) is located within the orthographic projection of the first encapsulation layer (5) on the substrate (1); Preferably, the material of the first encapsulation layer (5) comprises organic material.

6. The display panel according to claim 5, characterized in that: The display panel (10) further comprises a second encapsulation layer (6), wherein the second encapsulation layer (6) is located on a side of the first encapsulation layer (5) facing the substrate (1); The second encapsulation layer (6) extends from the display area (110) to the non-display area (120), and the orthographic projection of the second encapsulation layer (6) on the substrate (1) covers the orthographic projection of the first encapsulation layer (5) on the substrate (1) and the orthographic projection of the retaining wall (3) on the substrate (1); Preferably, the material of the second encapsulation layer (6) comprises an inorganic material.

7. The display panel according to claim 6, characterized in that: The display panel (10) further comprises a third encapsulation layer (7), wherein the third encapsulation layer (7) is located on a side of the first encapsulation layer (5) facing away from the substrate (1); The third encapsulation layer (7) extends from the display area (110) to the non-display area (120), and the orthographic projection of the third encapsulation layer (7) on the substrate (1) covers the orthographic projection of the first encapsulation layer (5) on the substrate (1) and the orthographic projection of the retaining wall (3) on the substrate (1); Preferably, the orthographic projection of the third encapsulation layer (7) on the substrate (1) covers the orthographic projection of the second encapsulation layer (6) on the substrate (1); Preferably, the material of the third encapsulation layer (7) comprises an inorganic material.

8. The display panel according to claim 5, characterized in that: The display panel (10) further comprises a light-emitting functional layer (8), wherein the light-emitting functional layer (8) is located on a side of the organic insulating layer (2) facing away from the substrate (1), and the first encapsulation layer (5) covers a surface of the light-emitting functional layer (8) facing away from the substrate (1).

9. The display panel according to claim 8, characterized in that: Along the thickness direction of the substrate (1), a driving circuit layer (9) is provided between the second organic insulating layer (22) and the substrate (1), and an orthographic projection outer contour of the driving circuit layer (9) on the substrate (1) is located within an orthographic projection outer contour of the second organic insulating layer (22) on the substrate (1); Preferably, the light-emitting functional layer (8) comprises an anode layer (81), and the anode layer (81) covers a side of the second organic insulating layer (22) facing away from the substrate (1).

10. A display device, characterized in that: A display panel (10) comprising any one of claims 1 to 9.

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