Display panel, display device and preparation method of display panel

Abstract

The application discloses a display panel, a display device and a preparation method of the display panel. The display panel comprises a bending display area and a non-bending display area, and comprises a substrate, a light emitting device layer and a first encapsulation layer. The first encapsulation layer is located on a side of the light emitting device layer away from the substrate. The first encapsulation layer comprises a barrier wall, a first organic encapsulation part and a second organic encapsulation part. The barrier wall is arranged on both sides of a bending axis. The first organic encapsulation part is located on a side of the light emitting device layer away from the substrate and covers the barrier wall. The first organic encapsulation part has an opening located in the bending display area. The second organic encapsulation part fills the opening. The second organic encapsulation part is located between the barrier walls arranged at intervals. The extension direction of the wall surface of the opening intersects with the thickness direction of the display panel. According to the embodiments provided in the application, the display panel, the display device and the preparation method of the display panel can avoid or reduce the entry of external water vapor into the display panel to corrode the light emitting device layer.

Description

TECHNICAL FIELD

[0001] The present application relates to the field of display panels, in particular to a display panel, a display device and a preparation method of the display panel. BACKGROUND

[0002] With the development of science and technology, electronic devices have been developing towards larger display area, thinner, more portable and the like. For a flexible display module, with the wide application of the frameless technology, the screen ratio of the electronic device is close to the limit. If a larger screen display area is needed, the electronic device needs to have a larger volume. In order to break through the limitation of the volume of the electronic device on the screen display area, a foldable display panel is a relatively optimal solution. In the related art, the foldable display panel can have a larger display area when the screen is unfolded, and a smaller carrying volume when the screen is folded.

[0003] The display panel in the related art adopts an encapsulation layer to encapsulate a light emitting device layer, so as to avoid external water vapor from entering the light emitting device layer. In the process of folding multiple times, the encapsulation layer is prone to cracks extending along the thickness direction of the encapsulation layer under the action of the folding force, so that the external water vapor can enter the light emitting device layer through the cracks in the encapsulation layer, the water vapor affects the light emission of the light emitting unit in the light emitting device layer, and the display panel appears black spots, affecting the display effect of the display panel. SUMMARY

[0004] Embodiments of the present application provide a display panel, a display device and a preparation method of the display panel, aiming to avoid or reduce the entry of external water vapor into the display panel to corrode the light emitting device layer, and improve the display effect of the display panel.

[0005] Embodiments of the first aspect of the present application provide a display panel, the display panel comprising at least one folding display area foldable along a folding axis, and a plurality of non-folding display areas, the at least one folding display area separating the display panel into the plurality of non-folding display areas, the display panel comprising:

[0006] a substrate;

[0007] a light emitting device layer located on one side of the substrate;

[0008] a first encapsulation layer located on a side of the light emitting device layer away from the substrate, the first encapsulation layer comprising a barrier wall, a first organic encapsulation portion and a second organic encapsulation portion, the barrier wall being oppositely and spacedly arranged on both sides of the folding axis, the first organic encapsulation portion being arranged on the side of the light emitting device layer away from the substrate and covering the barrier wall, the first organic encapsulation portion being located in the non-folding display area and at least part of the folding display area, the first organic encapsulation portion having an opening located in the folding display area, the second organic encapsulation portion filling the opening, the second organic encapsulation portion being located between the barrier walls arranged at intervals, and the extension direction of the wall surface of the opening intersecting the thickness direction of the display panel.

[0009] According to an embodiment of the first aspect of the present application, the cross-sectional dimension of the opening along a direction perpendicular to the thickness direction gradually increases along a direction from the substrate to the first encapsulation layer.

[0010] According to an embodiment of the first aspect of the present application, the wall surface is an arc surface.

[0011] According to an embodiment of the first aspect of the present application, the side of the second organic encapsulation portion away from the substrate is a flat surface.

[0012] According to an embodiment of the first aspect of the present application, the first organic encapsulation portion comprises a first sub-portion, a second sub-portion and a third sub-portion connected in sequence, the first sub-portion is disposed on the side of the barrier wall away from the bending axis, the first sub-portion extends from the non-bending display area to the direction close to the bending display area, the second sub-portion is disposed on the side of the barrier wall away from the substrate, the third sub-portion is disposed on the side of the barrier wall close to the bending axis, and the opening is disposed on the third sub-portion.

[0013] According to an embodiment of the first aspect of the present application, the side of the first sub-portion, the second sub-portion and the second organic encapsulation portion away from the substrate is a flat surface and flush.

[0014] According to an embodiment of the first aspect of the present application, the barrier wall, the second sub-portion and the third sub-portion are all disposed in the bending display area.

[0015] According to an embodiment of the first aspect of the present application, the display panel further comprises a second encapsulation layer between the first encapsulation layer and the light-emitting device layer, and the second encapsulation layer is an organic encapsulation layer.

[0016] According to an embodiment of the first aspect of the present application, the second encapsulation layer and the first encapsulation layer are the same organic material.

[0017] According to an embodiment of the first aspect of the present application, the display panel further comprises a third encapsulation layer between the second encapsulation layer and the light-emitting device layer.

[0018] According to an embodiment of the first aspect of the present application, the display panel further comprises a fourth encapsulation layer on the side of the first encapsulation layer away from the light-emitting device layer.

[0019] According to an embodiment of the first aspect of the present application, the third encapsulation layer and the fourth encapsulation layer are both inorganic materials.

[0020] According to an embodiment of the first aspect of the present application, at least two of the first organic encapsulation portion, the second organic encapsulation portion and the barrier wall are the same organic material.

[0021] According to an embodiment of the first aspect of the present application, the barrier wall extends along the direction of the bending axis.

[0022] According to an embodiment of the first aspect of the present application, the display panel comprises side edges arranged opposite to each other along the direction of the bending axis, and the barrier wall is arranged apart from the side edges.

[0023] According to an embodiment of the first aspect of the present application, the barrier wall comprises a plurality of sub-barrier walls, the plurality of sub-barrier walls located on the same side of the bending axis are arranged apart from each other along the direction of the bending axis, and the first organic encapsulation part further comprises a fourth sub-part between adjacent sub-barrier walls located on the same side of the bending axis.

[0024] The embodiment of the second aspect of the present application provides a preparation method of a display panel, the preparation method comprising:

[0025] A workpiece to be processed is provided, the workpiece to be processed comprising a substrate and a light-emitting device layer located on one side of the substrate; the workpiece to be processed comprises at least one bending display area which can be bent along a bending axis and a plurality of non-bending display areas, and the at least one bending display area separates the display panel into a plurality of non-bending display areas;

[0026] A barrier wall is formed on the workpiece to be processed;

[0027] Excess first encapsulation material is coated on the workpiece to be processed and on the side of the barrier wall away from the bending axis, so that the first encapsulation material overflows to the side of the barrier wall close to the bending axis, the first encapsulation material overflowing to the side of the barrier wall is solidified to form a first organic encapsulation part with an opening, and the opening is located in the bending display area;

[0028] A second encapsulation material is filled in the opening and solidified to form a second organic encapsulation part.

[0029] The embodiment of the third aspect of the present application provides a display device, comprising:

[0030] The display panel provided in the first aspect.

[0031] In the display panel, the display device and the preparation method of the display panel provided in the embodiments of the present application, the first encapsulation layer is provided with a plurality of interfaces by arranging the barrier wall, the first organic encapsulation part and the second organic encapsulation part in the first encapsulation layer, which is beneficial to reducing cracks in the first encapsulation layer along the thickness direction. The second organic encapsulation part is arranged to fill the opening of the first organic encapsulation part, so that the second organic encapsulation part filled in the opening and the first organic encapsulation part forming the opening are in contact and a contact interface is formed between them. The second organic encapsulation part is arranged to be located between the barrier walls arranged at intervals, and the extending direction of the wall surface of the opening intersects with the thickness direction of the display panel, so that the extending direction of the contact interface intersects with the thickness direction of the display panel. Therefore, when the second organic encapsulation part located in the bending display area is bent and cracks occur, the cracks are more likely to extend along the extending direction of the contact interface, so that the cracks are to some extent avoided or reduced from extending along the thickness direction, so as to reduce the entry of external water vapor along the thickness direction into the side of the first encapsulation layer close to the light emitting device layer, so as to improve the service life of the light emitting device layer. BRIEF DESCRIPTION OF DRAWINGS

[0032] Other features, objects, and advantages of the present application will become more apparent from the following detailed description of non-limiting embodiments thereof as taken in conjunction with the accompanying drawings, in which like references denote like features, and in which:

[0033] Figure 1 is a structural schematic diagram of a display panel in a folded state provided by the first aspect of the present application;

[0034] Figure 2 is a structural schematic diagram of a display panel in an unfolded state provided by the first aspect of the present application;

[0035] Figure 3 is a cross-sectional structural schematic diagram of a display panel provided by the first aspect of the present application;

[0036] Figure 4 is a partial cross-sectional structural schematic diagram of a display panel provided by the first aspect of the present application;

[0037] Figure 5 is a preparation flow schematic diagram of a display panel provided by the first aspect of the present application;

[0038] Figure 6 is a partial planar structural schematic diagram of a display panel provided by the first aspect of the present application;

[0039] Figure 7 is a partial planar structural schematic diagram of a display panel provided by the first aspect of the present application.

[0040] KEY

[0041] 100, display panel; 10, non-bending display area; 20, bending display area; L, bending axis;

[0042] 1, substrate; 2, light emitting device layer; 3, first encapsulation layer; 31, barrier wall; 311, first notch; 312, second notch; 32, first organic encapsulation part; 321, first sub-part; 322, second sub-part; 323, third sub-part; 33, second organic encapsulation part; 34, opening; 341, wall surface; 35, second encapsulation layer; 4, third encapsulation layer; 5, fourth encapsulation layer; 6, driving circuit layer.

[0043] Specific embodiments

[0044] Features and exemplary embodiments of various aspects of the present application will be described below in detail, in order to make the purposes, technical solutions and advantages of the present application more clear and apparent, the present application will be further described in detail below in combination with the 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. The present application can be implemented without some of these specific details for those skilled in the art. The following description of the embodiments is only to provide a better understanding of the present application by showing examples of the present application.

[0045] It should be noted that, in this paper, relationship terms such as first and second are only used to distinguish one entity or operation from another entity or operation, and do not necessarily require or imply any such actual relationship or order between the entities or operations. Moreover, the terms "include", "contain" or any other variants thereof are intended to cover non-exclusive inclusion, so that the process, method, article or equipment including a series of elements not only includes those elements, but also includes other elements not explicitly listed, or includes elements inherent to such process, method, article or equipment. Without more limitations, the elements defined by the statement "include" do not exclude the presence of other identical elements in the process, method, article or equipment including the elements.

[0046] It should be understood that when describing the structure of a component, when a layer, a region is referred to as being "on" or "above" another layer, another region, it can be directly above the other layer, another region, or other layers or regions are included between it and the other layer, another region. And if the component is turned over, the layer, the region will be "under" or "below" the other layer, another region.

[0047] In the related art, in the process of repeated folding, the encapsulation layer is prone to cracks extending along the thickness direction of the encapsulation layer under the action of the bending force, so that external moisture can enter the light emitting device layer through the cracks in the encapsulation layer, the moisture affects the light emitting unit in the light emitting device layer to emit light, and the display panel appears black spots, affecting the display effect of the display panel.

[0048] The existing solutions cannot well solve the above technical problems. To solve the above problems, the embodiments of the present application provide a display panel, a display device and a preparation method of the display panel. The embodiments of the display panel, the display device and the preparation method of the display panel will be described below with reference to the accompanying drawings.

[0049] Please refer to Figure 1 and Figure 2 The first aspect of the application provides a display panel 100, which comprises at least one bending display area 20 that can be bent along a bending axis L, and a plurality of non-bending display areas 10 (which can be flat display areas), and the at least one bending display area 20 separates the display panel 100 into a plurality of non-bending display areas 10.

[0050] The display panel 100 can be used to display images. The display panel 100 has a folded state and an unfolded state. When the display panel 100 is folded, the bending display area 20 is at least partially curved into an arc shape around the bending axis L, and the non-bending display area 10 connected to the bending display area 20 can be stacked, thereby reducing the volume of the display panel 100, as shown in the embodiment of Figure 1 , which is a structural schematic view of the display panel 100 in the folded state. Figure 1 The bending display area 20 is unfolded, so that the bending display area 20 and the non-bending display area 10 connected to the bending display area 20 can be unfolded together for display, thereby obtaining a larger display area, as shown in the embodiment of Figure 2 , which is a structural schematic view of the display panel 100 in the unfolded state. Figure 2 Optionally, the number of bending display areas 20 can be one, and the number of non-bending display areas 10 is two, and the two non-bending display areas 10 are arranged on both sides of the bending axis L.

[0051] Please refer to Figure 3 and Figure 4The display panel 100 comprises a substrate 1, a light emitting device layer 2 and a first encapsulation layer 3. The light emitting device layer 2 is located on one side of the substrate 1. The first encapsulation layer 3 is located on the side of the light emitting device layer 2 away from the substrate 1. The first encapsulation layer 3 comprises a barrier wall 31, a first organic encapsulation part 32 and a second organic encapsulation part 33. The barrier wall 31 is arranged on both sides of the bending axis L in a relative manner. The first organic encapsulation part 32 is arranged on the side of the light emitting device layer 2 away from the substrate 1 and covers the barrier wall 31. The first organic encapsulation part 32 is located in the non-bending display area 10 and at least part of the bending display area 20. The first organic encapsulation part 32 has an opening located in the bending display area 20. The second organic encapsulation part 33 fills the opening. The second organic encapsulation part 33 is located between the barrier walls 31 arranged in a spaced manner. The first organic encapsulation part 32 comprises a wall surface 341 defining the opening. The extension direction of the wall surface 341 intersects the thickness direction X of the display panel 100.

[0052] The substrate 1 can be a flexible film, so that the substrate 1 can be bent. The material of the flexible film includes flexible materials such as polyimide (PI). The light emitting device layer 2 is a functional layer with light emitting display capability. The light emitting device layer 2 comprises a pixel definition layer and a plurality of light emitting units. The pixel definition layer comprises a plurality of pixel openings. The light emitting units are arranged in the pixel openings. In an example, the light emitting units can be prepared by using organic light emitting diodes (OLEDs). Alternatively, the light emitting units can be micro light emitting diodes (Micro-LEDs) or quantum dot light emitting diodes (QLEDs). The first organic encapsulation part 32 can be considered as two, corresponding to the bending display areas 20 on both sides of the bending display area 20 along the first direction. The two first organic encapsulation parts 32 can be located on both sides of the bending axis L along the first direction. The first direction can be perpendicular to the extension direction of the bending axis L.

[0053] The display panel 100 of the embodiment can further comprise a driving circuit layer 6, a support layer and a touch layer. The driving circuit layer 6 is used to control whether the light emitting units emit light and the light emitting duration. The driving circuit layer 6 can comprise a gate metal layer, a source / drain metal layer, an active layer and the like. In the case that the substrate 1 is a flexible film, the substrate 1 cannot completely support the layer structure. A support layer can be arranged to reinforce the support of the substrate 1. In the case that the display panel 100 is in a folded state, the support layer, the substrate 1 and the first encapsulation layer 3 are bent together. The material of the support layer includes hard materials such as stainless steel (SUS). The support layer is not easy to deform under stress. The support layer can well guarantee the bending shape of the display panel 100 and further reinforce the structure of the display panel 100.

[0054] The first encapsulation layer 3 is located on the side of the light emitting device layer 2 away from the substrate 1, and the first encapsulation layer 3 can prevent external moisture from entering the light emitting device layer 2. The barrier walls 31, the first organic encapsulation part 32, and the second organic encapsulation part 33 can all be made of encapsulation materials with moisture barrier properties. The first organic encapsulation part 32 not only covers the barrier walls 31, but also can cover the entire non-bending display area 10, so that the first organic encapsulation part 32 can prevent external moisture from entering the light emitting device layer 2 located in the non-bending display area 10. The first organic encapsulation part 32 has an opening located in the bending display area 20, and the second organic encapsulation part 33 fills the opening and is located between the barrier walls 31 arranged at intervals, that is, the opening is also located between the barrier walls 31 arranged at intervals. The opening is located in the bending display area 20, that is, the second organic encapsulation part 33 is also located in the bending display area 20. When the display panel 100 is in a folded state, the barrier walls 31 and the second organic encapsulation part 33 are bent together, so compared with the region of the first organic encapsulation part 32 located in the non-bending display area 10, the second organic encapsulation part 33 needs to be repeatedly bent according to different states of the display panel 100. The repeatedly bent second organic encapsulation part 33 is more prone to cracking. Since the second organic encapsulation part 33 is filled in the opening formed by the first organic encapsulation part 32, the second organic encapsulation part 33 filled in the opening and the first organic encapsulation part 32 forming the opening are in contact and form a contact interface therebetween. The extension direction of the contact interface is the same as the extension direction of the wall surface 341 of the opening. Since the extension direction of the wall surface 341 of the opening is not the same as the thickness direction X of the display panel 100, the extension direction of the contact interface is not the same as the thickness direction X of the display panel 100. Therefore, when the second organic encapsulation part 33 located in the bending display area 20 is bent and cracks, the crack is more likely to extend along the extension direction of the contact interface, thereby to some extent avoiding or reducing the extension of the crack along the thickness direction X, so as to reduce the entry of external moisture along the thickness direction X into the side of the first encapsulation layer 3 close to the light emitting device layer 2, and to improve the service life of the light emitting device layer 2.

[0055] The opening 34 can be formed by opening or slotting on the prepared first organic encapsulation part 32, that is, in some embodiments, the first organic encapsulation part 32 can be formed first, and then the opening 34 is arranged on the first organic encapsulation part 32. In some embodiments, the first organic encapsulation part 32 and the opening 34 can also be prepared together. Figure 5 (a), when the first encapsulation layer 3 is prepared, the barrier walls 31 can be prepared first, as shown in Figure 5(b), then coating the encapsulating material with fluidity on the side of the dam 31 away from the bending axis L, to ensure that the encapsulating material can be coated uniformly on the side of the dam 31 away from the bending axis L, and that the excess encapsulating material can overflow the dam 31 to the space between the spaced-apart dams 31, with a portion of the encapsulating material overflowing from one side of a dam 31 to the other side of the dam 31 in the positive direction Y1, a portion of the encapsulating material overflowing from one side of another dam 31 to the other side of the dam 31 in the negative direction Y2, and the two portions of the encapsulating material overflowing to the space between the spaced-apart dams 31 in the positive direction Y1 and the negative direction Y2, respectively, as shown in Figure 5 (c), by adjusting the height of the dam 31 and the volume of the coated encapsulating material, the volume of the encapsulating material overflowing to the space between the dams 31 can be adjusted, so that the two portions of the encapsulating material can form the first organic encapsulating portion 32 with the opening 34 after solidification, as shown in Figure 5 (d), the encapsulating material is arranged in the opening 34 to form the second organic encapsulating portion 33. The dam 31, the first organic encapsulating portion 32 and the second organic encapsulating portion 33 can be made of the same material or different materials, but the dam 31, the first organic encapsulating portion 32 and the second organic encapsulating portion 33 are prepared at different times, so that the first encapsulating layer 3 has multiple interfaces, which is beneficial to reducing the cracks in the first encapsulating layer 3 in the thickness direction X.

[0056] In this embodiment, the dam 31, the first organic encapsulating portion 32 and the second organic encapsulating portion 33 are arranged in the first encapsulating layer 3, so that the first encapsulating layer 3 has multiple interfaces, which is beneficial to reducing the cracks in the first encapsulating layer 3 in the thickness direction X; the second organic encapsulating portion 33 is arranged to fill the opening of the first organic encapsulating portion 32, so that the second organic encapsulating portion 33 filled in the opening and the first organic encapsulating portion 32 forming the opening are in contact and form a contact interface therebetween, and the second organic encapsulating portion 33 is arranged between the spaced-apart dams 31, so that the extension direction of the contact interface is different from the thickness direction X of the display panel 100, and thus when the second organic encapsulating portion 33 located in the bending display area 20 is bent and cracks, the cracks are more likely to extend along the extension direction of the contact interface, thereby avoiding or reducing the extension of the cracks in the thickness direction X to some extent, reducing the entry of external moisture into the first encapsulating layer 3 close to the light emitting device layer 2 in the thickness direction X, and improving the service life of the light emitting device layer 2.

[0057] Please refer to Figure 3 and Figure 4 In some embodiments, the cross-sectional dimension of the opening perpendicular to the thickness direction X gradually increases in the direction of the substrate 1 pointing to the first encapsulating layer 3.

[0058] Since the wall surface 341 can be formed by overflow of the encapsulation material from the side of the barrier wall 31 away from the bending axis L, under the combined action of the flowability of the encapsulation material, the friction between the functional layer coated by the encapsulation material and the encapsulation material, the gravity experienced by the encapsulation material, and other parameters, the encapsulation material that flows and solidifies at the same time can form an opening gradually increasing in size along the direction from the substrate 1 to the first encapsulation layer 3. Alternatively, along the direction from the substrate 1 to the first encapsulation layer 3, the size of the opening in the first direction perpendicular to the bending axis L gradually increases. The first direction can be perpendicular to the thickness direction of the display panel.

[0059] In some embodiments, under the surface tension of the encapsulation material, the wall surface 341 is an arc surface. Those skilled in the art can adjust the flowability of the encapsulation material, the friction between the functional layer coated by the encapsulation material and the encapsulation material, the gravity experienced by the encapsulation material, and other parameters to form wall surfaces 341 with different curvatures. For example, the greater the flowability of the encapsulation material, the steeper the wall surface 341, the smaller the angle between the extension direction of the wall surface 341 and the thickness direction X, the smaller the flowability of the encapsulation material, the flatter the wall surface 341, and the greater the angle between the extension direction of the wall surface 341 and the thickness direction X; the greater the friction between the functional layer coated by the encapsulation material and the encapsulation material, the steeper the wall surface 341, the smaller the angle between the extension direction of the wall surface 341 and the thickness direction X, the smaller the friction between the functional layer coated by the encapsulation material and the encapsulation material, the flatter the wall surface 341, and the greater the angle between the extension direction of the wall surface 341 and the thickness direction X.

[0060] Of course, during the preparation of the first organic encapsulation part 32, the encapsulation material can also be pushed to flow between the barrier walls 31 arranged at intervals by external force, so that part of the encapsulation material in the wall surface 341 formed flows under the action of gravity and gradually solidifies during the flow, and part of the encapsulation material flows under the combined action of gravity and external force and gradually solidifies during the flow, thereby obtaining wall surfaces 341 with different curvatures.

[0061] In an embodiment, the second organic encapsulation part 33 is a plane away from the substrate 1, to facilitate the arrangement of other functional layers on the side of the second organic encapsulation part 33 away from the substrate 1.

[0062] In some embodiments, the first organic encapsulation part 32 includes a first sub-part 321, a second sub-part 322, and a third sub-part 323 connected in sequence, the first sub-part 321 is located on the side of the barrier wall 31 away from the bending axis L, the first sub-part 321 extends from the non-bending display area 10 to the direction close to the bending display area 20, the second sub-part 322 is located on the side of the barrier wall 31 away from the substrate 1, and the third sub-part 323 is located on the side of the barrier wall 31 close to the bending axis L, and the opening is arranged in the third sub-part 323.

[0063] The opening can be a through hole penetrating the first encapsulation layer 3 along the thickness direction X, or a groove recessed from the side of the first encapsulation layer 3 away from the substrate 1, i.e. the opening does not penetrate the first encapsulation layer 3 along the thickness direction X. During the preparation of the first organic encapsulation portion 32, the flow rate of the encapsulation material flowing towards the barrier wall 31 and the solidification time can be controlled to form a through hole-shaped opening or a groove-shaped opening. Optionally, along the direction close to the bending axis L, the third sub-portion 323 gradually decreases in the dimension along the thickness direction of the display panel (i.e. the thickness of the third sub-portion 323).

[0064] The opposite sides of the barrier wall 31 can form contact interfaces with the first sub-portion 321 and the third sub-portion 323 respectively, and the side of the barrier wall 31 away from the substrate 1 can form a contact interface with the second sub-portion 322. The wall surface 341 of the opening defined by the third sub-portion 323 forms a contact interface with the second organic encapsulation portion 33. By forming multiple contact interfaces, it is beneficial to reduce the cracks along the thickness direction X in the first encapsulation layer 3. By extending the first sub-portion 321 from the non-bending display area 10 to the bending display area 20, the first sub-portion 321 can be placed to protect the light emitting device layer 2 in the non-bending display area 10 from external moisture.

[0065] In an embodiment, the side of the first sub-portion 321, the second sub-portion 322 and the second organic encapsulation portion 33 away from the substrate 1 is planar and flush, so as to facilitate the arrangement of other functional layers on the side of the second organic encapsulation portion 33 away from the substrate 1.

[0066] In some embodiments, the barrier wall 31, the second sub-portion 322 and the third sub-portion 323 are all arranged in the bending display area 20, so that the contact interfaces formed between the barrier wall 31, the second sub-portion 322 and the third sub-portion 323 are all located in the bending display area 20, which can reduce the cracks along the thickness direction X in the first encapsulation layer 3 located in the bending display area 20.

[0067] In an embodiment, the display panel 100 further comprises a second encapsulation layer 35 located between the first encapsulation layer 3 and the light emitting device layer 2, and the second encapsulation layer 35 is an organic encapsulation layer.

[0068] Since the second encapsulation layer 35, the first organic encapsulation portion 32 and the second organic encapsulation portion 33 are all organic materials, they have the same or similar physical and chemical properties, so that the contact interface between the first encapsulation layer 3 and the second encapsulation layer 35 has small differences, and the first encapsulation layer 3 and the second encapsulation layer 35 are more closely connected.

[0069] Optionally, the second encapsulation layer 35 and the first encapsulation layer 3 are the same organic material, further reducing or eliminating the material difference between the second encapsulation layer 35 and the first encapsulation layer 3, thereby improving the connection tightness of the first encapsulation layer 3 and the second encapsulation layer 35.

[0070] In some embodiments, at least two of the first organic encapsulation part 32, the second organic encapsulation part 33 and the barrier wall 31 are the same organic material, using the same organic material so that the structure made of the same organic material is connected tightly. Optionally, the first organic encapsulation part 32, the second organic encapsulation part 33 and the barrier wall 31 are all the same organic material. The organic material can be one or more of polyimide (PI), polyethylene terephthalate (PET), polyethylene naphthalate and polycarbonate, so that the first organic encapsulation part 32 can relieve the stress between adjacent functional layers in the display panel 100.

[0071] In some embodiments, the display panel 100 further comprises a third encapsulation layer 4 located between the second encapsulation layer 3 and the light emitting device layer 2. The third encapsulation layer 4 can be an inorganic material.

[0072] In addition to the first encapsulation layer 3, other encapsulation layers can also be provided as needed to improve the protection of the light emitting device layer 2.

[0073] In another embodiment, the display panel 100 further comprises a fourth encapsulation layer 5 located on the side of the first encapsulation layer 3 away from the light emitting device layer 2. The fourth encapsulation layer 5 can be an inorganic material.

[0074] The third encapsulation layer 4 and the fourth encapsulation layer 5 are both inorganic materials to improve the role of the encapsulation layer in isolating water vapor. Optionally, the inorganic material is SiNx, SiOx, SiOxNx, etc. In order to facilitate the preparation of the fourth encapsulation layer 5, the thickness of the first organic encapsulation part 32 can be kept consistent with the thickness of the second organic encapsulation part 33, so that the surface of the first encapsulation layer 3 away from the substrate 1 is a plane.

[0075] Please refer to Figure 6In some embodiments, the barrier wall 31 extends along the direction of the bending axis L. In the case where the number of the barrier walls 31 is two, the two barrier walls 31 can be arranged at two sides of the bending axis L, respectively, and the first sub portion 321 is arranged at a side of the two barrier walls 31 away from the bending axis L, and the third sub portion 323 is arranged between the two barrier walls 31, and the encapsulation material can extend along the direction of the bending axis L through the opening formed by the two barrier walls 31. In the direction perpendicular to the bending axis L, the distance between the two barrier walls 31 and the bending axis L is the same, and the barrier wall is symmetrical about the bending axis L, which can ensure that the appearance of the second organic encapsulation portion 33 is regular, and the stress of the bending display area 20 is uniform when the bending display area 20 is bent. The opening can be symmetrical about the bending axis L.

[0076] In the case where the display panel 100 is in the folded state, by arranging the barrier wall 31 to extend along the direction of the bending axis L, the stress in the barrier wall 31 is reduced, and the barrier wall 31 is prevented from cracking.

[0077] In some embodiments, the display panel 100 includes side edges arranged opposite to each other along the direction of the bending axis L, and the barrier wall 31 is arranged apart from the side edges. The barrier wall 31 and the side edges are arranged apart to form a first gap 311, and in the preparation of the first organic encapsulation portion 32, the flowing encapsulation material can directly flow to the direction close to the bending axis L through the first gap 311, so that there is no opening or the size of the partial opening of the first organic encapsulation portion 32 gradually decreases from the center of the display panel 100 to the direction close to the side edge, to avoid or reduce the second organic encapsulation portion 33 filled in the opening from flowing out from the side edge, to facilitate the preparation of the second organic encapsulation portion 33.

[0078] Please refer to Figure 7 In other embodiments, the barrier wall 31 includes a plurality of sub barrier walls 31, and the plurality of sub barrier walls 31 located at the same side of the bending axis L are arranged apart along the direction of the bending axis L, and the first organic encapsulation portion 32 further includes a fourth sub portion between adjacent sub barrier walls 31 located at the same side of the bending axis L.

[0079] The second gap 312 is formed between the adjacent sub barrier walls 31 along the direction of the bending axis L, and the encapsulation material located in the second gap 312 is solidified to form the fourth sub portion. In the preparation of the first organic encapsulation portion 32, part of the flowing encapsulation material can directly flow to the direction close to the bending axis L through the second gap 312, and part of the flowing encapsulation material needs to flow to the direction close to the bending axis L through the barrier wall 31, so that the flow rate of the encapsulation material flowing between the barrier walls 31 is different, and the opening formed thereby has a variable shape, to complicate the contact interface between the first organic encapsulation portion 32 and the second organic encapsulation portion 33, and the complicated and variable contact interface can effectively block the continuous extension of the crack.

[0080] Optionally, the sub-walls 31 on both sides of the bending axis L can be arranged directly in the direction perpendicular to the bending axis L, or can be arranged in a staggered manner. The distance between the side surface of the sub-wall 31 on one side of the bending axis L and the bending axis L can be the same.

[0081] In a second aspect, the embodiments of the present application further provide a preparation method of a display panel, which can be used to prepare the display panel 100 in the above embodiments. The preparation method comprises:

[0082] S10, providing a workpiece to be processed, the workpiece to be processed comprising a substrate and a light-emitting device layer on one side of the substrate; the workpiece to be processed comprises at least one bending display area 20 which can be bent along the bending axis L and a plurality of non-bending display areas 10 (i.e. flat display areas), and the at least one bending display area 20 separates the workpiece to be processed into a plurality of non-bending display areas 10.

[0083] S20, forming a wall on the workpiece to be processed;

[0084] S30, coating an excess of first encapsulation material on one side of the workpiece to be processed and the wall away from the bending axis, so that the first encapsulation material overflows to the side of the wall close to the bending axis, the first encapsulation material overflowing to the side of the wall is solidified to form a first organic encapsulation part with an opening, and the opening is located in the bending display area;

[0085] S40, filling a second encapsulation material in the opening and solidifying to form a second organic encapsulation part.

[0086] The first encapsulation material can be coated in two times, i.e. first coating an excess of first encapsulation material on the first side of the bending axis L, the side of the wall close to the bending axis L on the first side of the bending axis L is overflowed, after solidification, coating an excess of first encapsulation material on the second side of the bending axis L, the side of the wall close to the bending axis L on the second side of the bending axis L is overflowed, after solidification, S40 is executed. The first side and the second side of the bending axis L can be opposite in the first direction. The excess of first encapsulation material can also be coated on the first side and the second side of the bending axis L at the same time, and solidified at the same time.

[0087] The workpiece to be processed can further comprise the third encapsulation layer 4 described above, and after the second encapsulation material filled in S40 is solidified, a fourth encapsulation layer 5 can be formed on the first organic encapsulation part 32 and the second organic encapsulation part 33.

[0088] In S30, the first encapsulation material can be placed on the side of the workpiece far from the bending axis L, and the first encapsulation material can flow from the side to the direction close to the bending axis L under the action of gravity, or move from the side to the direction close to the bending axis L under the action of the force applied by the preparer, until overflow to the side of the dam 31 close to the bending axis L, so as to ensure that the first encapsulation material uniformly covers the side of the dam 31 far from the bending axis L before the first encapsulation material solidifies. Since the non-bending display area 10 is arranged on both sides of the bending display area 20, the first encapsulation material can be placed on both sides of the bending axis L, and the first encapsulation material can overflow from the two non-bending display areas 10 to the side of the dam 31 close to the bending axis L. Alternatively, the first encapsulation material and the second encapsulation material are the same material.

[0089] In the method for manufacturing the display panel 100 provided in the embodiments of the present application, the display panel 100 has the related structures described above, and can refer to the display panel 100 provided in the embodiments described above, and has all the beneficial effects of the display panel 100 described above, which will not be repeated here.

[0090] In an embodiment, between S10 and S20, the method further comprises:

[0091] forming the second encapsulation layer on the workpiece;

[0092] S20 comprises:

[0093] forming the dam on the second encapsulation layer.

[0094] The second encapsulation layer 35 is formed on the workpiece, and the dam 31 is arranged on the second encapsulation layer 35. Of course, the encapsulation material used to form the first organic encapsulation part 32 can be coated on the second encapsulation layer 35, so that the first encapsulation layer 3 prepared is located on the side of the second encapsulation layer 35 far from the substrate 1.

[0095] In a third aspect, the embodiments of the present application also provide a display device, which can be a mobile phone, a tablet computer, a notebook computer, a palm computer, etc. having the display panel 100, and can also be a personal computer (PC), a television (TV), a teller machine or a self-service machine, etc., which is not limited in the embodiments of the present application.

[0096] In the display device provided in the embodiments of the present application, the display panel 100 has the related structures described above, and can refer to the display panel 100 provided in the embodiments described above, and has all the beneficial effects of the display panel 100 described above, which will not be repeated here.

[0097] In accordance with the embodiments of the application described above, these embodiments are not meant to be exhaustive or limiting of the application. Many alternatives, modifications, and variations will be apparent to those skilled in the art in light of the above teachings. Accordingly, the scope of the present application should be determined not with reference to the above description, but with reference to the appended claims along with their full scope of equivalents.

Claims

1. A display panel, characterized by, The display panel comprises at least one bending display area which can bend along a bending axis, and a plurality of non-bending display areas, the at least one bending display area separating the display panel into a plurality of non-bending display areas, the display panel comprising: a substrate; a light-emitting device layer on one side of the substrate; a first encapsulation layer on a side of the light-emitting device layer away from the substrate, the first encapsulation layer comprising a barrier wall, a first organic encapsulation portion, and a second organic encapsulation portion, the barrier wall being oppositely spaced on both sides of the bending axis, the first organic encapsulation portion being disposed on a side of the light-emitting device layer away from the substrate and covering the barrier wall, the first organic encapsulation portion being located in the non-bending display area and at least part of the bending display area, the first organic encapsulation portion having an opening in the bending display area, the second organic encapsulation portion filling the opening, the second organic encapsulation portion being located between the barrier walls which are spaced apart, and the extension direction of the wall surface of the opening intersecting the thickness direction of the display panel.

2. The display panel of claim 1, wherein, The cross-sectional dimension of the opening perpendicular to the thickness direction gradually increases in the direction of the substrate pointing to the first encapsulation layer.

3. The display panel of claim 2, wherein, The wall surface is an arc surface.

4. The display panel of claim 2, wherein, The side of the second organic encapsulation portion away from the substrate is a plane.

5. The display panel of claim 1, wherein, The first organic encapsulation portion comprises a first sub-portion, a second sub-portion, and a third sub-portion connected in sequence, the first sub-portion being located on a side of the barrier wall away from the bending axis, the first sub-portion extending from the non-bending display area to the direction close to the bending display area, the second sub-portion being located on a side of the barrier wall away from the substrate, the third sub-portion being located on a side of the barrier wall close to the bending axis, and the opening being disposed in the third sub-portion.

6. The display panel of claim 5, wherein, The side of the first sub-portion, the second sub-portion, and the second organic encapsulation portion away from the substrate is a plane and flush.

7. The display panel of claim 5, wherein, The barrier wall, the second sub-portion, and the third sub-portion are all disposed in the bending display area.

8. The display panel of claim 1, wherein, The display panel further comprises a second encapsulation layer between the first encapsulation layer and the light-emitting device layer, the second encapsulation layer being an organic encapsulation layer.

9. The display panel of claim 8, wherein, The second encapsulation layer and the first encapsulation layer are the same organic material.

10. The display panel of claim 8, wherein The display panel further comprises a third encapsulation layer between the second encapsulation layer and the light-emitting device layer.

11. The display panel of claim 10, wherein, The display panel further comprises a fourth encapsulation layer on a side of the first encapsulation layer away from the light-emitting device layer.

12. The display panel of claim 11, wherein, The third encapsulation layer and the fourth encapsulation layer are both inorganic materials.

13. The display panel of claim 1, wherein, At least two of the first organic encapsulation portion, the second organic encapsulation portion, and the barrier wall are the same organic material.

14. The display panel of claim 1, wherein, The barrier wall extends in the direction of the bending axis.

15. The display panel of claim 14, wherein, The display panel comprises side edges oppositely spaced in the direction of the bending axis, and the barrier wall is spaced apart from the side edges.

16. The display panel of claim 14, wherein, The barrier wall comprises a plurality of sub-barrier walls, a plurality of the sub-barrier walls located on the same side of the bending axis being sequentially and spaced apart in the direction of the bending axis, and the first organic encapsulation portion further comprising a fourth sub-portion between adjacent sub-barrier walls located on the same side of the bending axis.

17. A method for manufacturing a display panel, characterized by, The preparation method comprises: providing a workpiece to be processed, the workpiece to be processed comprising a substrate and a light-emitting device layer on one side of the substrate; the workpiece to be processed comprising at least one bending display area which can be bent along a bending axis and a plurality of non-bending display areas, the at least one bending display area separating the workpiece to be processed into a plurality of non-bending display areas, forming a dam on the workpiece to be processed; applying an excess of a first encapsulating material on the workpiece to be processed and on a side of the dam away from the bending axis, so that the first encapsulating material overflows to a side of the dam close to the bending axis, the first encapsulating material which has overflowed to the side of the dam solidifying to form a first organic encapsulating portion having an opening, and the opening being located in the bending display area; filling a second encapsulating material into the opening and solidifying to form a second organic encapsulating portion.

18. A display device comprising: The display panel comprises: the display panel as claimed in any one of claims 1-16.

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