A display panel, a manufacturing method thereof, and a display device

Abstract

The present application provides a display panel, a manufacturing method thereof, and a display device, relating to the field of display technologies. The display panel, the manufacturing method thereof, and the display device provided by the present application mainly improve the structures of the planarization layer and the pixel definition layer in the display panel. Specifically, the planarization layer has a first portion located in the non-display area, and the pixel definition layer also has a second portion located in the non-display area and stacked on the first portion. The first portion and the second portion define the edge portion of the whole formed by the planarization layer and the pixel definition layer outside the display area on the substrate. Desiccant particles are provided inside the first portion and the second portion, so that the edge portion of the whole formed by the planarization layer and the pixel definition layer has a certain water-blocking ability, which can effectively prevent water vapor from laterally invading the display area along the edge of the display panel, and improve the reliability of the display panel.

Description

Technical Field

[0001] The present invention relates to the field of display technologies, and in particular, to a display panel, a manufacturing method thereof, and a display device. Background Art

[0002] Organic Light Emitting Diode (OLED) display panels have been widely developed and applied due to their simple structure, self-luminescence, fast response speed, ultra-thinness, low power consumption, etc. For existing OLED display panels, water and oxygen in the environment are likely to cause the failure of OLED devices inside the OLED display panels. Therefore, currently, after the OLED devices are fabricated on the substrate, a packaging film layer needs to be provided to prevent water and oxygen from eroding the OLED devices.

[0003] In the traditional method, a TFE packaging film layer is provided on the substrate of the OLED. The packaging film layer is specifically composed of a first inorganic film layer, an organic film layer, and a second inorganic film layer sequentially provided on the substrate. The first inorganic film layer and the second inorganic film layer play a role in blocking water and oxygen, while the organic film layer mainly plays a role in extending the water vapor transmission path and releasing the stress of other film layers, and contributes less to the water and oxygen blocking effect. The entire packaging film layer presents a form in which the first inorganic film layer and the second inorganic film layer wrap the organic film layer. To enable the packaging film layer to present this form, a retaining wall portion is provided inside the edge of the non-display area of the substrate to prevent the flowable organic material used to form the organic film layer from flowing in an unexpected direction and then moving to the outside of the non-display area.

[0004] Currently, as users' requirements for the display effect of OLED display panels continue to increase. In the prior art, some OLED display panels with narrow border designs have emerged. When manufacturing these OLED display panels, the final flow cut-off position of the flowable organic material for forming the organic film layer is relatively close to the boundary position between the first inorganic film layer and the second inorganic film layer. This will result in a small size of the directly overlapping portion between the first inorganic film layer and the second inorganic film layer, and water vapor is likely to laterally invade the display area of the display panel from the edge of the display panel, reducing the reliability of the product and making the entire display panel have a high risk of failure. Summary of the Invention

[0005] In summary, the technical problem to be solved by the present application is: to provide a display panel with strong resistance to lateral water vapor invasion.

[0006] In a first aspect, the present application provides a display panel, including:

[0007] A substrate, on a first surface of which a display area and a non-display area surrounding the display area are formed;

[0008] A flat layer, which is disposed on the substrate and has at least a first part in the non-display area;

[0009] A pixel definition layer, which is disposed on the substrate and has at least a second part in the non-display area, and the second part is stacked on the side of the first part facing away from the substrate;

[0010] Wherein, desiccant particles are provided inside the first part and the second part.

[0011] Optionally, in some embodiments of the present application, it further includes a barrier wall part disposed in the non-display area. The barrier wall part is located on the side of the first part and the second part away from the display area, and desiccant particles are provided inside the barrier wall part.

[0012] Optionally, in some embodiments of the present application, the barrier wall part includes a first barrier wall layer formed by patterning the same film layer as the first part and a second barrier wall layer formed by patterning the same film layer as the second part, and the second barrier wall layer is stacked on the side of the first barrier wall layer facing away from the substrate.

[0013] Optionally, in some embodiments of the present application, a first surface of the substrate has side edges defining its edge and a corner defined by two intersecting side edges. The first part includes a side part inside the side edge and a corner part inside the corner. The side part extends to the inside of the display area, and the corner part is outside the display area.

[0014] Optionally, in some embodiments of the present application, the density of the desiccant particles provided in the first part is greater than the density of the desiccant particles provided in the second part.

[0015] Optionally, in some embodiments of the present application, the flat layer further has a third part in the display area, and the pixel definition layer has a fourth part in the display area and stacked on the side of the third part facing away from the substrate. No desiccant particles are provided inside the third part and the fourth part.

[0016] In a second aspect, the present application provides a method for manufacturing a display panel, including:

[0017] Providing a substrate, on a first surface of which a display area and a non-display area surrounding the display area are formed;

[0018] Disposing a flat layer on the substrate, the flat layer having at least a first part in the non-display area, and desiccant particles are provided inside the first part;

[0019] A pixel definition layer is provided on the substrate. The pixel definition layer has at least a second portion in the non-display area. The second portion is stacked on the side of the first portion facing away from the substrate, and desiccant particles are provided inside the second portion.

[0020] Optionally, in some embodiments of the present application, providing a planarization layer on the substrate includes:

[0021] Coating a first photoresist layer filled with desiccant particles on the substrate to form the first portion;

[0022] Providing the pixel definition layer on the substrate includes:

[0023] Coating a second photoresist layer filled with desiccant particles on the substrate to form the second portion.

[0024] Optionally, in some embodiments of the present application, providing the planarization layer on the substrate further includes:

[0025] Coating a third photoresist layer without desiccant particles provided inside on the substrate to form a third portion that constitutes a part of the planarization layer and is in the display area;

[0026] Providing the pixel definition layer on the substrate further includes:

[0027] Coating a fourth photoresist layer without desiccant particles provided inside on the substrate to form a fourth portion that constitutes a part of the pixel definition layer and is in the display area.

[0028] Optionally, in some embodiments of the present application, coating the first photoresist layer on the substrate to form the first portion includes:

[0029] Coating a first photoresist layer filled with desiccant particles on the substrate, and performing a patterning process on the first photoresist layer to form the first portion and a first barrier layer in the non-display area. The first barrier layer at least constitutes a part of the barrier portion.

[0030] Optionally, in some embodiments of the present application, coating the second photoresist layer filled with desiccant particles on the substrate to form the second portion includes:

[0031] A second photoresist layer filled with desiccant particles is coated on the substrate, and the second photoresist layer is patterned to form the second part and a second barrier layer in the non-display area. The second barrier layer is stacked on the side of the first barrier layer facing away from the substrate, and the whole formed by the first barrier layer and the second barrier layer at least constitutes a part of the barrier portion.

[0032] In a third aspect, the present application provides a display device, including a display panel, where the display panel is the display panel as described in the first aspect, or the display panel is manufactured by using the manufacturing method of the display panel as described in the second aspect.

[0033] Due to the adoption of the above technical solutions, the present application at least includes the following beneficial effects:

[0034] The display panel, its manufacturing method, and the display device provided by the present application mainly improve the structures of the planarization layer and the pixel definition layer in the display panel. Specifically, the planarization layer has a first part in the non-display area, and the pixel definition layer also has a second part in the non-display area and stacked on the first part. The first part and the second part define the edge part of the whole formed by the planarization layer and the pixel definition layer outside the display area on the substrate, and desiccant particles are provided inside the first part and the second part, so that the edge part of the whole formed by the planarization layer and the pixel definition layer outside the display area has a certain water-blocking ability, which can effectively prevent water vapor from laterally invading the display area from the edge of the display panel, and improve the reliability of the display panel. Description of the Drawings

[0035] In order to more clearly illustrate the technical solutions in the embodiments of the present application or the prior art, the following briefly introduces the drawings required to be used in the embodiments. The drawings in the following description are only partial embodiments of the present application. For those of ordinary skill in the art, other drawings can be obtained according to these drawings without creative efforts.

[0036] Figure 1 It is a schematic structural diagram of the first surface on the substrate in Embodiment 1 provided by the present invention;

[0037] Figure 2 It is Figure 1 a cross-sectional schematic diagram taken at A-A in;

[0038] Figure 3 It is a schematic structural diagram of the first photoresist layer after patterning in Embodiment 1 provided by the present invention;

[0039] Figure 4 It is a schematic structural diagram of the second photoresist layer after patterning in Embodiment 1 provided by the present invention;

[0040] Figure 5 Schematic diagram of the positions of the side part and the corner part in the first part in another embodiment provided by the present invention;

[0041] Figure 6 Schematic flow chart of the method for manufacturing a display panel in Embodiment 1 provided by the present invention;

[0042] Figure 7 Schematic flow chart of the method for manufacturing a display panel in Embodiment 1 provided by the present invention after further refinement;

[0043] Explanation of reference numerals:

[0044] 100 - Substrate, 110 - First surface, 110a - Side, 110b - Corner;

[0045] 200 - Flat layer, 210 - First part, 210a - Side part, 210b - Corner part, 220 - Third part;

[0046] 300 - Pixel definition layer, 310 - Second part, 320 - Fourth part;

[0047] 400 - Barrier wall part, 410 - First barrier wall, 420 - Second barrier wall, 430 - First barrier wall layer, 440 - Second barrier wall layer;

[0048] 500 - Encapsulation film layer, 510 - First inorganic film layer, 520 - Organic film layer, 530 - Second inorganic film layer. Detailed implementation manners

[0049] Next, the technical solutions in the embodiments of the present application will be clearly and completely described in conjunction with the accompanying drawings in the embodiments of the present application. Obviously, the described embodiments are only a part of the embodiments of the present invention, rather than all the embodiments. Based on the embodiments of the present invention, all other embodiments obtained by those skilled in the art without creative efforts belong to the scope of protection of the present invention.

[0050] In the description of the present invention, it should be understood that the orientation or positional relationships indicated by the terms "center", "longitudinal", "transverse", "length", "width", "thickness", "upper", "lower", "front", "rear", "left", "right", "vertical", "horizontal", "top", "bottom", "inner", "outer", etc. are based on the orientation or positional relationships shown in the drawings, and are only for facilitating the description of the present invention and simplifying the description, rather than indicating or implying that the device or element referred to must have a unique orientation, be constructed and operated in a specific orientation, and thus cannot be construed as a limitation to the present invention. In addition, the terms "first" and "second" are only used for descriptive purposes and cannot be construed as indicating or implying relative importance or implying the number of indicated technical features. Thus, the features defined with "first" and "second" may explicitly or implicitly include one or more features. In the description of the present invention, "a plurality" means two or more unless otherwise specifically defined.

[0051] In the application, the term "exemplary" is used to mean "serving as an example, illustration, or explanation". Any embodiment described as "exemplary" in this application is not necessarily to be construed as more preferred or advantageous than other embodiments. The following description is provided to enable any person skilled in the art to make and use the present invention. In the following description, details are set forth for purposes of explanation. It should be understood that those of ordinary skill in the art can recognize that the present invention can be practiced without these specific details. In other instances, well-known structures and processes are not elaborated in detail to avoid obscuring the description of the present invention with unnecessary details. Therefore, the present invention is not intended to be limited to the embodiments shown, but is to be accorded the widest scope consistent with the principles disclosed in this application.

[0052] Embodiment 1

[0053] The main body of this embodiment is a display panel. Please refer to Figure 1 and Figure 2 , which are respectively the schematic structural diagram of the first surface 110 of the substrate 100 in the display panel provided in this embodiment, and Figure 1 the cross-sectional schematic diagram taken along line A-A in

[0054] Substrate 100, on the first surface 110 of the substrate 100, a display area AA and a non-display area NA surrounding the display area AA are formed;

[0055] Flat layer 200, the flat layer 200 is disposed on the substrate 100 and at least has a first portion 210 in the non-display area NA;

[0056] The pixel definition layer 300 is disposed on the substrate 100 and has at least a second portion 310 in the non-display area NA. The second portion 310 is stacked on the side of the first portion 210 facing away from the substrate 100.

[0057] Wherein, desiccant particles are provided inside the first portion 210 and the second portion 310.

[0058] In the technical solution provided in this embodiment, structural improvements are mainly made to the overall structure formed by the planarization layer 200 and the pixel definition layer 300. Specifically, the first portion 210 of the planarization layer 200 in the non-display area NA and the second portion 310 of the pixel definition layer 300 in the non-display area NA are stacked on top of each other, so that the first portion 210 and the second portion 320 define or at least partially define the edge portion of the overall structure formed by the planarization layer 200 and the pixel definition layer 300 outside the display area AA, and desiccant particles (such as calcium oxide particles, aluminum oxide particles, etc.) are provided inside both of them. In this way, the edge portion of the overall structure formed by the planarization layer 200 and the pixel definition layer 300 outside the display area AA has a strong ability to prevent water vapor from invading, ensuring the normal operation of the display area AA inside the non-display area NA and improving the reliability of the display panel.

[0059] First of all, it should be noted that without affecting the purpose of the invention, those skilled in the art can adjust the distribution form of the above-mentioned desiccant particles inside the first portion 210 and the second portion 310 according to the actual situation and specific needs. The desiccant particles can be uniformly mixed in the first portion 210 and the second portion 310 as shown in this embodiment, or can be unevenly mixed in the first portion 210 and the second portion 310. This application does not make special limitations on the specific situation of the desiccant particles distributed inside the first portion 210 and the second portion 310. However, it can be understood that as long as desiccant particles are mixed inside the first portion 210 and the second portion 310, the water blocking performance of the first portion 210 and the second portion 310 as film layer structures with certain water vapor permeability will be improved. In addition, the above-mentioned desiccant particles can be selected as nano desiccant particles in order to improve the water blocking performance of the first portion 210 and the second portion 310.

[0060] It is worth mentioning that compared with the technical solutions that only provide desiccant particles in the first portion 210 and only provide desiccant particles in the second portion 310, the technical solution provided in this embodiment effectively ensures the ability to prevent water vapor from invading at the stacked interface of the first portion 210 and the second portion 310, that is, at the edge portion of the stacked interface of the planarization layer 200 and the pixel definition layer 300, by providing desiccant particles in both the first portion 210 and the second portion 310 at the same time.

[0061] It should also be noted that those skilled in the art can understand that: the above-mentioned substrate 100 mainly refers to the array substrate 100 used to form a light-emitting device. The first surface 110 of the substrate 100 corresponds to the part of the display panel where the picture is displayed to form the display area AA of the first surface 110 of the substrate 100, and the part of the first surface 110 of the substrate 100 that does not correspond to the part of the display panel where the picture is displayed forms the non-display area NA of the first surface 110 of the substrate 100; the above-mentioned planarization layer 200 is mainly a film layer on the substrate 100 that provides mechanical support and flatness to other film layers such as the pixel definition layer 300; and the above-mentioned pixel definition layer 300 is mainly used to form a pixel opening for accommodating the light-emitting device layer. In this embodiment, the pixel definition layer 300 is disposed on the side of the planarization layer 200 facing away from the substrate 100.

[0062] In addition, in another embodiment, the density of the desiccant particles provided in the first part 210 is greater than the density of the desiccant particles provided in the second part 310. Among them, since the first part 210 and the substrate 100 are stacked on each other, when water vapor invades, there will be some water vapor invading along the stacked interface between the first part 210 and the substrate 100. For the second part 310, since the first inorganic film layer 510 is stacked on the second part 310, the first inorganic film layer 510 itself has good water vapor barrier properties, and the first inorganic film layer 510 can effectively prevent water vapor from invading along the stacked interface between the second part 310 and the first inorganic film layer 510. Therefore, the density of the desiccant particles provided in the first part 210 can be greater than the density of the desiccant particles provided in the second part 310 to reduce the risk of water vapor invading along the stacked interface between the first part 210 and the substrate 100.

[0063] It can be understood that the first part 210 and the second part 310 can also extend from the non-display area NA to the display area AA and cover the display area AA, that is, the first part 210 forms the planarization layer, and the second part 310 forms the pixel definition layer 300. In this case, the overall formed by the planarization layer 200 and the pixel definition layer 300 still has a high water blocking ability at the edge part outside the display area AA. However, the desiccant particles inside the first part 210 and the second part 310 are relatively active and may react unexpectedly with the light-emitting device layer, affecting the formation of the light-emitting device layer in the corresponding pixel opening or affecting the normal operation of the light-emitting device layer.

[0064] Corresponding to this, please refer to again Figure 2, in this embodiment, the flat layer 200 further has a third part 220 in the display area AA, and the pixel defining layer 300 has a fourth part 320 in the display area AA and stacked on the side of the third part 220 facing away from the substrate 100. No desiccant particles are provided in the third part 220 and the fourth part 320. The third part 220 is connected to the first part 210, and the fourth part 320 is connected to the second part 310. That is to say, the technical solution provided in this embodiment divides the flat layer 200 into a first part 210 and a third part 220, and divides the pixel defining layer 300 into a second part 310 and a fourth part 320. Pixel openings are provided on the fourth part 320 for accommodating the light-emitting device layer. As the film layers in the display area AA, no desiccant particles are provided inside the third part 220 and the fourth part 320, thus avoiding the influence of desiccant particles on the deposition of the light-emitting device layer and ensuring the normal operation of the light-emitting device layer.

[0065] Further, please refer to again Figure 2 , in this embodiment, a packaging film layer 500 is further provided on the substrate 100. The packaging film layer 500 includes a first inorganic film layer 510, an organic film layer 520, and a second inorganic film layer 530 sequentially provided on the substrate 100. The first inorganic film layer 510 covers the whole formed by the first part 210, the second part 310, the third part 220, and the fourth part 320. Among them, the organic film layer 520 is deposited by a solution method. Therefore, in order to limit the flow boundary range of the fluid organic material forming the organic film layer 520, as Figure 1 and Figure 2 shown, in this embodiment, the display panel further includes a barrier rib portion 400. The barrier rib portion 400 is provided in the non-display area NA and located on the side of the first part 210 and the second part 310 away from the display area AA.

[0066] For the barrier rib portion 400, the barrier rib portion 400 is mainly used to limit the flow boundary range of the fluid organic material forming the organic film layer 520 and to further improve the water vapor intrusion prevention performance on the side of the display panel. In this embodiment, desiccant particles are provided in the barrier rib portion 400. Among them, since the barrier rib portion 400 is in the non-display area NA outside the display area AA, and the barrier rib portion 400 is given a high water resistance due to the desiccant particles existing inside itself, the barrier rib portion 400 can effectively prevent water vapor from laterally invading into the display area AA from the edge of the display panel. Consistent with the previous description, the above-mentioned desiccant particles can be uniformly mixed in the barrier rib portion 400, and the above-mentioned desiccant particles can also be non-uniformly mixed in the barrier rib portion 400.

[0067] More specifically, in this embodiment, the number of components of the retaining wall in the retaining wall portion 400 is two groups, namely the first retaining wall 410 and the second retaining wall 420. The first retaining wall 410 and the second retaining wall 420 are arranged in sequence in the non-display area NA along the direction away from the display area AA. It can be understood that the description of the retaining wall portion 400 here is only for illustration. In other embodiments, the retaining wall portion 400 may include any one or both of the first retaining wall 410 and the second retaining wall 420. The retaining wall portion 400 may also include other retaining walls in addition to the first retaining wall 410 and the second retaining wall 420. That is, the present application does not impose any special restrictions on the number of components of the retaining wall in the retaining wall portion 400.

[0068] Regarding the arrangement manner of the retaining wall portion 400, on the premise of not affecting the invention purpose, the implementer can select the above arrangement manner of the retaining wall portion 400 according to his own needs. For example, the retaining wall portion 400 is formed by an independent process. In this embodiment, for the convenience of forming the retaining wall portion 400, the second retaining wall 420 includes a first retaining wall layer 430 formed by patterning the same film layer as the first part 210 and a second retaining wall layer 440 formed by patterning the same film layer as the second part 310. The second retaining wall layer 440 is stacked on the side of the first retaining wall layer 430 facing away from the substrate 100, while the first retaining wall 410 only includes the first retaining wall layer 430.

[0069] Please refer to Figure 3 and Figure 4 , the technical solution provided in this embodiment configures the first retaining wall layer 430 and the first part 210 to be in the same layer and adjacent, so that the two can be formed by patterning the same film layer, simplifying the forming process of the retaining wall portion 400; by the same principle, the technical solution provided in this embodiment also configures the second retaining wall layer 440 and the second part 310 to be in the same layer and adjacent, so that the two can also be formed by patterning the same film layer, further simplifying the forming process of the retaining wall portion 400. At the same time, the first retaining wall 410 and the second retaining wall 420 can also naturally form a certain height difference along with the process.

[0070] Furthermore, in a conventional display panel, the first surface 110 of the substrate 100 and the display area AA generally form two rectangles or squares with parallel same-side edges. At this time, please refer to again Figure 1, it can be seen that the linear distances D1 from the side edges 110a defining the edge of the first surface 110 on the substrate 100 to the display area AA and D2 from the corner 110b defined by the two intersecting side edges 110a to the display area AA are not of the same size. Specifically, the linear distance D1 from the side edge 110a to the display area AA is smaller than the linear distance D2 from the corner 110b to the display area AA. Since the linear distance D1 from the side edge 110a to the display area AA is smaller than the linear distance D2 from the corner 110b to the display area AA, when water vapor intrusion occurs, the water vapor is more likely to invade into the display area AA along the path from the side edge 110a to the display area AA. If the width of the first part 210 is the same everywhere in the direction around the display area AA, it does not match the specific situation of water vapor intrusion, which will lead to a decrease in the reliability of the display panel.

[0071] Therefore, please refer to Figure 5 , in another embodiment, the first part 210 further includes a side part 210a inside the side edge 110a and a corner part 210b inside the corner 110b. The side part 210a extends to the inside of the display area AA, and the corner part 210b is outside the display area AA. Since the side part 210a extends from the non-display area NA to the inside of the display area AA, under the same conditions, compared with the corner part 210b only in the non-display area NA, the side part 210a has a stronger ability to prevent water vapor intrusion and can effectively prevent water vapor from laterally invading into the display area AA from the side edge 110a at the edge of the display panel, so that the arrangement of the first part 210 can match the specific situation of water vapor intrusion, thereby improving the reliability of the display panel.

[0072] The manufacturing method of the display panel provided in this embodiment will be further introduced below.

[0073] Please refer to Figure 6 , the flow schematic diagram of the manufacturing method of the display panel provided in this embodiment. In this embodiment, the manufacturing method of the above display panel includes the steps:

[0074] S100. Provide a substrate 100, on the first surface 110 of the substrate 100, a display area AA and a non-display area NA surrounding the display area AA are formed;

[0075] S200. Set a planarization layer 200 on the substrate 100, the planarization layer 200 at least has a first part 210 in the non-display area NA, and desiccant particles are arranged inside the first part 210;

[0076] S300. A pixel definition layer 300 is provided on the substrate 100. The pixel definition layer 300 has at least a second portion 310 in the non-display area NA. The second portion 310 is stacked on the side of the first portion 210 facing away from the substrate 100, and desiccant particles are provided inside the second portion 310.

[0077] The method for manufacturing a display panel provided in this embodiment improves the structures of the planarization layer 200 and the pixel definition layer 300, forming a first portion 210 and a second portion 310 that are stacked on each other and have desiccant particles provided inside. As a result, both the edge portion of the overall formed by the planarization layer 200 and the pixel definition layer 300 outside the display area AA and the lamination interface between the two have a strong ability to prevent moisture intrusion, ensuring the normal operation of the display area AA inside the non-display area NA and improving the reliability of the display panel.

[0078] For more details, please refer to Figure 7 , the flow schematic diagram further refined for the method for manufacturing a display panel provided in this embodiment. In this embodiment, step S200 of providing the planarization layer 200 on the substrate 100 includes:

[0079] S210. A first photoresist layer filled with desiccant particles is coated on the substrate 100 to form a first portion 210 in the non-display area NA.

[0080] S220. A third photoresist layer without desiccant particles provided inside is coated on the substrate 100 to form a third portion 220 that constitutes a part of the planarization layer 200 and is in the display area AA.

[0081] And step S300 of providing the pixel definition layer 300 on the substrate 100 includes:

[0082] S310. A second photoresist layer filled with desiccant particles is coated on the substrate 100 to form a second portion 310 in the non-display area NA.

[0083] S320. A fourth photoresist layer without desiccant particles provided inside is coated on the substrate 100 to form a fourth portion 320 that constitutes a part of the pixel definition layer 300 and is in the display area AA.

[0084] That is to say, for the technical solution provided in this embodiment, a first photoresist layer is used to form a partial planarization layer 200, thereby forming a first part 210, and a second photoresist layer is used to form a partial pixel definition layer 300, thereby forming a second part 310. Compared with other technical means for forming the first part 210 and the second part 310, the flowable organic material for forming the photoresist layer can directly fill the desiccant particles before coating, so that the finally obtained photoresist layer is provided with desiccant particles inside, which makes it easier to form the first part 210 and the second part 310 with desiccant particles mixed inside.

[0085] It should be noted here that for steps S210 and S220, this embodiment adopts a method of coating in batches to form the planarization layer 200. The implementer can select the forming order of the first part 210 and the third part 220 according to the actual situation, and is not limited to the order of forming the first part 210 first and then the third part 220 shown in this embodiment. The same is true for steps S310 and S320. The implementer can select the forming order of the second part 310 and the fourth part 320 according to the actual situation, and is not limited to the order of forming the second part 310 first and then the fourth part 320 shown in this embodiment.

[0086] In addition, please refer to Figure 3 , for step S210, in this embodiment, step S210 specifically includes:

[0087] Coat a first photoresist layer filled with desiccant particles on the substrate 100, and perform patterning on the first photoresist layer to form a first part 210 and a first barrier layer 430 in the non-display area NA;

[0088] Meanwhile, please refer to Figure 4 , step S310 specifically includes:

[0089] Coat a second photoresist layer filled with desiccant particles on the substrate 100, and perform patterning on the second photoresist layer to form a second part 310 and a second barrier layer 440 in the non-display area NA. The second barrier layer 440 is stacked on the side of the first barrier layer 430 facing away from the substrate 100.

[0090] That is to say, in this embodiment, the first barrier layer 430 is formed by patterning a first photoresist layer and is spaced from the first part 210, while the second barrier layer 440 is formed by patterning a second photoresist layer and is spaced from the third part 220. Thus, on the basis of simplifying the forming method of the barrier part 400, desiccant particles can be mixed inside the barrier part 400 to enhance the ability of the display panel edge to prevent water vapor intrusion. More specifically, in this embodiment, the above-mentioned first photoresist layer and second photoresist layer are both patterned by exposure, development, and etching. Without affecting the purpose of the invention, those skilled in the art can select the patterning methods of the above-mentioned first photoresist layer and second photoresist layer according to the actual situation.

[0091] Embodiment 2

[0092] The main body of Embodiment 2 is a display device, including a display panel, which is the display panel described in Embodiment 1 or is manufactured by using the manufacturing method of the display panel described in Embodiment 1. It should be noted here that the display device provided in this embodiment is any product or component with a display function, such as a mobile phone, a television, a tablet computer, a monitor, a VR / AR device, a computer, a vehicle-mounted display, etc. Those skilled in the art can make a choice according to their own needs, and this application does not make any special limitations.

[0093] The basic concepts have been described above. Obviously, for those skilled in the art, the above detailed disclosure is only an example and does not constitute a limitation to this application. Although not explicitly stated here, those skilled in the art may make various modifications, improvements, and corrections to this application. Such modifications, improvements, and corrections are proposed in this application, so such modifications, improvements, and corrections still belong to the spirit and scope of the exemplary embodiments of this application.

[0094] At the same time, this application uses specific terms to describe the embodiments of this application. Such as "one embodiment", "an embodiment", and / or "some embodiments" mean a certain feature, structure, or characteristic related to at least one embodiment of this application. Therefore, it should be emphasized and noted that the "one embodiment" or "an embodiment" or "an alternative embodiment" mentioned twice or more at different positions in this specification does not necessarily refer to the same embodiment. In addition, certain features, structures, or characteristics in one or more embodiments of this application can be appropriately combined.

[0095] Similarly, it should be noted that, in order to simplify the description disclosed in this application and thus help the understanding of one or more embodiments of the invention, in the foregoing description of the embodiments of this application, sometimes multiple features are merged into one embodiment, drawing, or description thereof. However, this disclosure method does not mean that the features required by the subject matter of this application are more than those mentioned in the claims. In fact, the features of the embodiments are fewer than all the features of the single embodiment disclosed above.

[0096] In some embodiments, numbers are used to describe components and the quantity of attributes. It should be understood that such numbers used for the description of embodiments are modified by the modifiers "about", "approximately", or "substantially" in some examples. Unless otherwise specified, "about", "approximately", or "substantially" indicates that the number allows a change of ±%. Accordingly, in some embodiments, the numerical parameters used in the specification and claims are approximate values, and such approximate values may change according to the characteristics required by individual embodiments. In some embodiments, the numerical parameters should consider the specified significant digits and adopt the method of retaining the general number of digits. Although the numerical ranges and parameters used in some embodiments of this application to confirm the breadth of their scope are approximate values, in specific embodiments, the setting of such numerical values is as precise as possible within the feasible range.

[0097] For each patent, patent application, patent application publication, and other materials cited in this application, such as articles, books, specifications, publications, documents, etc., their entire contents are hereby incorporated into this application by reference, except for the application history documents that are inconsistent with or conflict with the content of this application, and also except for the documents that limit the broadest scope of the claims of this application (currently or subsequently appended to this application). It should be noted that if there are inconsistencies or conflicts between the descriptions, definitions, and / or uses of terms in the attached materials of this application and the content of this application, the descriptions, definitions, and / or uses of terms in this application shall prevail.

Claims

1. A display panel, characterized in that, Comprising: A substrate, on a first surface of which a display area and a non-display area surrounding the display area are formed; A planarization layer, which is disposed on the substrate and has at least a first portion in the non-display area; A pixel definition layer, which is disposed on the substrate and has at least a second portion in the non-display area, and the second portion is stacked on a side of the first portion facing away from the substrate; Wherein, desiccant particles are provided inside the first portion and the second portion; The display panel further includes a barrier rib portion disposed in the non-display area, the barrier rib portion is located on a side of the first portion and the second portion away from the display area, the barrier rib portion includes a first barrier rib layer formed by patterning the same film layer as the first portion and a second barrier rib layer formed by patterning the same film layer as the second portion, and the second barrier rib layer is stacked on a side of the first barrier rib layer facing away from the substrate; desiccant particles are provided inside the first barrier rib layer and the second barrier rib layer.

2. The display panel according to claim 1, wherein The first surface of the substrate has side edges defining its edge and a corner defined by two intersecting side edges, the first portion includes a side portion inside the side edges and a corner portion inside the corner, the side portion extends inside the display area, and the corner portion is outside the display area.

3. The display panel according to claim 1, wherein, The density of the desiccant particles provided inside the first portion is greater than the density of the desiccant particles provided inside the second portion.

4. The display panel according to any one of claims 1 to 3, characterized in that, The planarization layer further has a third portion in the display area, the pixel definition layer has a fourth portion in the display area and stacked on a side of the third portion facing away from the substrate, and no desiccant particles are provided inside the third portion and the fourth portion.

5. A method for manufacturing a display panel, characterized in that, Comprising: Providing a substrate, on a first surface of which a display area and a non-display area surrounding the display area are formed; Disposing a planarization layer on the substrate, the planarization layer has at least a first portion in the non-display area, and desiccant particles are provided inside the first portion; Disposing a pixel definition layer on the substrate, the pixel definition layer has at least a second portion in the non-display area, the second portion is stacked on a side of the first portion facing away from the substrate, and desiccant particles are provided inside the second portion; The display panel further includes a barrier rib portion disposed in the non-display area, the barrier rib portion is located on a side of the first portion and the second portion away from the display area, the barrier rib portion includes a first barrier rib layer formed by patterning the same film layer as the first portion and a second barrier rib layer formed by patterning the same film layer as the second portion, and the second barrier rib layer is stacked on a side of the first barrier rib layer facing away from the substrate; desiccant particles are provided inside the first barrier rib layer and the second barrier rib layer.

6. The method for manufacturing a display panel according to claim 5, wherein The disposing the planarization layer on the substrate includes: Coating a first photoresist layer filled with desiccant particles on the substrate to form the first portion; The disposing the pixel definition layer on the substrate includes: Coat a second photoresist layer filled with desiccant particles on the substrate to form the second part.

7. The method for manufacturing a display panel according to claim 6, wherein, The step of disposing a planarization layer on the substrate further includes: Coat a third photoresist layer without desiccant particles disposed therein on the substrate to form a third part that constitutes a part of the planarization layer and is located in the display area. The step of disposing a pixel definition layer on the substrate further includes: Coat a fourth photoresist layer without desiccant particles disposed therein on the substrate to form a fourth part that constitutes a part of the pixel definition layer and is located in the display area.

8. The method for manufacturing a display panel according to claim 6, wherein, The step of coating a first photoresist layer on the substrate to form the first part includes: Coat a first photoresist layer filled with desiccant particles on the substrate, and pattern the first photoresist layer to form the first part and a first barrier layer in the non-display area, where the first barrier layer at least constitutes a part of the barrier portion.

9. The method for manufacturing a display panel according to claim 8, wherein, The step of coating a second photoresist layer filled with desiccant particles on the substrate to form the second part includes: Coat a second photoresist layer filled with desiccant particles on the substrate, and pattern the second photoresist layer to form the second part and a second barrier layer in the non-display area. The second barrier layer is stacked on a side of the first barrier layer facing away from the substrate, and the whole formed by the first barrier layer and the second barrier layer at least constitutes a part of the barrier portion.

10. A display device, comprising a display panel, characterized in that, The display panel is the display panel according to any one of claims 1 to 4, or the display panel is manufactured by using the manufacturing method of the display panel according to any one of claims 5 to 9.

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