Display panel

Abstract

The invention relates to a display panel. The display panel comprises a display area and a non-display area adjacent to the display area. The display panel further comprises a pixel definition layer, a printing layer and an absorption layer. A plurality of pixel openings located in the display area, an ink storage groove located in the non-display area and a first retaining wall arranged around the ink storage groove are formed in the pixel definition layer; the printing layer comprises pixel printing parts arranged in the plurality of pixel openings; the absorption layer is arranged in the non-display area; wherein the absorption layer is arranged on the first retaining wall and / or arranged in the ink storage groove, and the water absorption rate of the absorption layer is larger than 1; the amount of ink in the non-display area can be increased, the solvent atmosphere of the edge of the display panel can be increased, the solvent evaporation speed of different areas of the display panel can be balanced, then the film forming uniformity of the pixel printing part in the display panel can be effectively improved, and the light emitting efficiency and the yield of the display panel are improved.

Description

Technical Field

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

[0002] Organic Light-Emitting Diodes (OLEDs) are considered the next generation of display technology due to their self-luminescence, fast response, wide viewing angle, high brightness, vibrant colors, and thinness. Organic OLED thin film deposition methods primarily include vacuum evaporation and solution deposition. In inkjet printing, the solvent dries faster in the edge areas of inkjet printing than in the display area. To ensure uniform film formation between pixels and uniform brightness across the device, auxiliary pixels are typically placed in the edge areas. This means that ink is also printed within these auxiliary pixels, preventing them from emitting light when the device is turned on.

[0003] However, the amount of ink placed in the auxiliary pixel is currently limited, and the film formation uniformity of the pixel cannot be further improved. Summary of the Invention

[0004] The embodiment of the present application provides a display panel that can increase the amount of ink contained in the ink storage tank, thereby effectively improving the film formation uniformity of the pixel printing part.

[0005] An embodiment of the present application provides a display panel, comprising a display area and a non-display area adjacent to the display area;

[0006] The display panel further includes:

[0007] a pixel definition layer, wherein a plurality of pixel openings located in the display area, an ink storage tank located in the non-display area, and a first retaining wall disposed around the ink storage tank are formed in the pixel definition layer;

[0008] a printing layer comprising a pixel printing portion disposed within the plurality of pixel openings;

[0009] an absorption layer, disposed in the non-display area;

[0010] Wherein, the absorption layer is arranged on the first retaining wall and / or in the ink storage tank, and the water absorption rate of the absorption layer is greater than 1.

[0011] In one embodiment of the present application, a three-dimensional network structure and / or a porous structure is distributed in the absorption layer.

[0012] In one embodiment of the present application, the absorption layer is provided in the ink storage tank, and the absorption layer is located on the side wall and / or bottom surface of the ink storage tank.

[0013] In one embodiment of the present application, the absorption layer is located on at least a portion of the surface of the first retaining wall.

[0014] In one embodiment of the present application, the ink storage tank is arranged around the display area, and the absorption layer is arranged around the display area.

[0015] In one embodiment of the present application, the ink storage tank is divided into a plurality of first sub-slots and a plurality of second sub-slots along a direction surrounding the display area, wherein the first sub-slots are arranged near a corner of the display area, and the second sub-slots are located on a side of the first sub-slot away from the corner of the display area;

[0016] The first retaining wall includes a first sub-portion arranged around the first sub-groove and a second sub-portion arranged around the second sub-groove, the absorption layer includes a first absorption portion and a second absorption portion, the first absorption portion is arranged on the first sub-portion and / or in the first sub-groove, the second absorption portion is arranged on the second sub-portion and / or in the second sub-groove, and the water absorption of the first absorption portion is greater than the water absorption of the second absorption portion.

[0017] In one embodiment of the present application, the thickness of the first absorption part is greater than the thickness of the second absorption part.

[0018] In one embodiment of the present application, the water absorption rate of the material of the first absorption part is greater than the water absorption rate of the material of the second absorption part.

[0019] In one embodiment of the present application, within the display area, the plurality of pixel openings are arranged along a first direction and a second direction, and the first direction and the second direction intersect;

[0020] In the non-display area, the ink storage tank includes a plurality of third sub-tanks arranged along the first direction and the second direction.

[0021] In one embodiment of the present application, the printing layer further includes a virtual printing portion disposed in the ink storage tank. When the absorption layer is disposed in the ink storage tank, the virtual printing portion is disposed on the absorption layer.

[0022] The present application provides a display panel, which provides an absorption layer on the first retaining wall of the pixel definition layer and / or in the ink storage tank, and the water absorption rate of the absorption layer is greater than 1. Therefore, during the manufacturing process of the display panel, the absorption layer can absorb ink, increase the amount of ink in the non-display area, increase the solvent atmosphere at the edge of the display panel, and balance the solvent evaporation rate in different areas of the display panel, thereby effectively improving the film formation uniformity of the pixel printing part in the display panel, and improving the luminous efficiency and yield of the display panel.

[0023] Other features and advantages of the present application will be described in detail in the subsequent detailed description. BRIEF DESCRIPTION OF THE DRAWINGS

[0024] To more clearly illustrate the technical solutions in the embodiments of the present application, the following briefly introduces the drawings required for describing the embodiments. Obviously, the drawings described below are only some embodiments of the present application. Those skilled in the art can also derive other drawings based on these drawings without inventive effort.

[0025] In order to more completely understand the present application and its beneficial effects, the following description will be given in conjunction with the accompanying drawings, wherein the same drawing numbers represent the same parts in the following description.

[0026] Figure 1 A schematic diagram of a first structure of a display panel provided in an embodiment of the present application;

[0027] Figure 2 A schematic diagram of a second structure of a display panel provided in an embodiment of the present application;

[0028] Figure 3 A third structural schematic diagram of a display panel provided in an embodiment of the present application;

[0029] Figure 4 A fourth structural schematic diagram of a display panel provided in an embodiment of the present application;

[0030] Figure 5 A fifth structural schematic diagram of a display panel provided in an embodiment of the present application;

[0031] Figure 6 A sixth structural diagram of a display panel provided in an embodiment of the present application;

[0032] Figure 7 A seventh structural schematic diagram of a display panel provided in an embodiment of the present application;

[0033] Figure 8 This is a schematic diagram of an eighth structure of a display panel provided in an embodiment of the present application;

[0034] Figure 9 A schematic diagram of a first planar distribution of a display panel provided in an embodiment of the present application;

[0035] Figure 10 A schematic diagram of the structure of the pixel definition layer in the display area provided in an embodiment of the present application;

[0036] Figure 11 A schematic diagram of a second planar distribution of the display panel provided in an embodiment of the present application;

[0037] Figure 12 A third planar distribution diagram of the display panel provided in an embodiment of the present application;

[0038] Figure 13 This is a schematic diagram of a fourth plane distribution of the display panel provided in an embodiment of the present application.

[0039] Description of reference numerals:

[0040] 10. Array substrate; 101. Display area; 102. Non-display area;

[0041] 20, pixel definition layer; 21, first retaining wall; 211, first sub-portion; 212, second sub-portion; 22, second retaining wall; 23, third retaining wall; 201, ink reservoir; 2011, first sub-slot; 2012, second sub-slot; 2013, third sub-slot; 202, pixel opening;

[0042] 30. Printing layer; 31. Pixel printing unit; 32. Virtual printing unit;

[0043] 40. Absorbent layer; 41. First absorbent portion; 42. Second absorbent portion;

[0044] 50. Anode layer; 51. First anode; 52. Second anode. DETAILED DESCRIPTION

[0045] The following will be combined with the drawings in the embodiments of the present application to clearly and completely describe the technical solutions in the embodiments of the present application. Obviously, the embodiments described are only part of the embodiments of the present application, not all of the embodiments. Based on the embodiments in the present application, all other embodiments obtained by those skilled in the art without creative work are within the scope of protection of the present application.

[0046] Please refer to Figure 1 An embodiment of the present application provides a display panel, which includes a display area 101 and a non-display area 102 adjacent to the display area 101; the display panel also includes a pixel definition layer 20, a printing layer 30 and an absorption layer 40.

[0047] The pixel definition layer 20 is formed with a plurality of pixel openings 202 located in the display area 101, an ink storage tank 201 located in the non-display area 102, and a first retaining wall 21 arranged around the ink storage tank 201; the printing layer 30 includes a pixel printing portion 31 arranged in the plurality of pixel openings 202; and the absorption layer 40 is arranged in the non-display area 102.

[0048] The absorption layer 40 is disposed on the first retaining wall 21 and / or in the ink storage tank 201 , and the water absorption rate of the absorption layer 40 is greater than 1.

[0049] During the implementation and application process, the embodiment of the present application sets an absorption layer 40 on the first retaining wall 21 of the pixel definition layer 20 and / or in the ink storage tank 201, and the water absorption rate of the absorption layer 40 is greater than 1. Therefore, in the process of manufacturing the display panel, the absorption layer 40 can absorb ink, increase the amount of ink in the non-display area 102, increase the solvent atmosphere at the edge of the display panel, and balance the solvent evaporation rate in different areas of the display panel, thereby effectively improving the film formation uniformity of the pixel printing part 31 in the display panel, and improving the luminous efficiency and yield of the display panel.

[0050] For details, please refer to Figure 1 The display panel includes an array substrate 10 and a pixel definition layer 20 and a printing layer 30 disposed on the array substrate 10 .

[0051] In some embodiments, the array substrate 10 includes a substrate and a thin film transistor layer disposed on the substrate.

[0052] In some embodiments, the substrate may be a rigid substrate, such as a glass substrate; or the substrate may be a flexible substrate, such as a polyimide substrate. When the substrate is a flexible substrate, the substrate may be formed of multiple sub-substrates made of the same material, such as polyimide, with adjacent sub-substrates bonded together by adhesive sub-layers.

[0053] In some embodiments, the thin film transistor layer includes a thin film transistor, which includes a semiconductor located on the substrate. The semiconductor may be formed of polysilicon or a metal oxide (such as indium gallium zinc oxide). The semiconductor is divided into a channel region and source and drain regions formed on either side of the channel region. The thin film transistor layer also includes a first gate insulating layer that covers the semiconductor. The thin film transistor also includes a first gate formed on the first gate insulating layer, overlapping the channel region. The first gate may be formed as multiple layers or a single layer comprising a low-resistance material such as Al, Ti, Mo, Cu, Ni, or alloys thereof, or a material with high corrosion resistance. The thin film transistor layer also includes a second gate insulating layer that covers the first gate. The thin film transistor also includes a second gate located on the second gate insulating layer, overlapping the first gate. The second gate may be formed as multiple layers or a single layer comprising a low-resistance material such as Al, Ti, Mo, Cu, Ni, or alloys thereof, or a material with high corrosion resistance. The thin film transistor layer also includes a first interlayer insulating layer formed on the second gate. The first interlayer insulating layer, the first gate insulating layer, and the second gate insulating layer include a source contact hole and a drain contact hole, and the source region and the drain region are exposed through the source contact hole and the drain contact hole, respectively.

[0054] The thin film transistor also includes a source and a drain arranged in the same layer, and the source and the drain are both formed on the first interlayer insulating layer. The source is connected to the source region through the source contact hole, and the drain is connected to the drain region through the drain contact hole. The source and the drain can be multiple layers or a single layer formed of a low-resistance material such as Al, Ti, Mo, Cu, Ni, or an alloy thereof, or a material with high corrosion resistance. For example, the source and the drain can be a triple layer of Ti / Cu / Ti, Ti / Ag / Ti, Ti / Al / Ti or Mo / Al / Mo, or other single or multilayer structures.

[0055] In some embodiments, the thin film transistor layer further includes a planar layer located on a side of the first interlayer insulating layer away from the substrate, and the planar layer covers the source electrode and the drain electrode.

[0056] In some embodiments, the display panel also includes an anode layer 50 disposed on the array substrate 10, and the anode layer 50 may include a plurality of first anodes 51 disposed in the display area 101 and spaced apart, and the first anodes 51 may be connected to the source or drain in the array substrate 10 to achieve signal transmission.

[0057] In some embodiments, a pixel definition layer 20 is disposed on the array substrate 10, and a plurality of pixel openings 202 located in the display area 101 and an ink storage tank 201 located in the non-display area 102 are formed in the pixel definition layer 20; the plurality of pixel openings 202 and the plurality of first anodes 51 can be arranged in a one-to-one correspondence, and each pixel opening 202 can expose the surface of the corresponding first anode 51 away from the array substrate 10.

[0058] Furthermore, the printing layer 30 is arranged on the pixel definition layer 20, and the printing layer 30 includes a plurality of pixel printing portions 31 arranged in the display area 101, and the plurality of pixel printing portions 31 and the plurality of pixel openings 202 can be arranged in a one-to-one correspondence, each pixel printing portion 31 is arranged in the corresponding pixel opening 202, and is located on the side of the corresponding first anode 51 away from the array substrate 10.

[0059] The pixel definition layer 20 further includes an ink reservoir 201 formed in the non-display area 102 . The ink reservoir 201 can be used to store ink during the manufacturing process of the display panel.

[0060] It should be noted that the display panel provided in the embodiment of the present application needs to adopt an inkjet printing process to form the printing layer 30, and the printing layer 30 includes a plurality of pixel printing parts 31 formed in the pixel opening 202, and the pixel printing part 31 can be prepared by an inkjet printing process. In the inkjet printing process, after the ink of the pixel printing part 31 is formed, it needs to be cured to form a film so that the solvent of the ink evaporates. However, the solvent evaporates faster at the edge of the display panel, which easily leads to uneven film thickness of the pixel printing part 31. In order to make the solvent atmosphere above the display panel uniform to ensure the thickness uniformity of the pixel printing part 31, the embodiment of the present application sets an ink storage tank 201 in the non-display area 102 to accommodate ink during the process, so as to increase the solvent atmosphere at the edge of the display panel and balance the solvent evaporation rate in different areas of the display panel, thereby effectively improving the film uniformity of the pixel printing part 31 in the display panel and improving the luminous efficiency and yield of the display panel.

[0061] In some embodiments, the pixel printing portion 31 may include at least one of a hole injection layer, a hole transport layer, and a light-emitting layer arranged in the pixel opening 202; wherein the hole injection layer is located between the hole transport layer and the anode, the hole transport layer is located on the side of the hole injection layer away from the anode, and the light-emitting layer is located on the side of the hole transport layer away from the hole injection layer; and the hole injection layer, the hole transport layer, and the light-emitting layer can all be prepared by inkjet printing technology; when the pixel printing portion 31 contains a light-emitting layer, the pixel printing portion 31 has a light-emitting function.

[0062] It is understandable that the display panel may further include an electron transport layer and an electron injection layer sequentially arranged on a side of the printed layer 30 away from the array substrate 10 , and the electron transport layer and the electron injection layer may be prepared by an evaporation process.

[0063] In an embodiment of the present application, the pixel definition layer 20 includes a first retaining wall 21 arranged around the ink storage tank 201; and the display panel also includes an absorption layer 40, and the absorption layer 40 is arranged on the first retaining wall 21 and / or in the ink storage tank 201, and the water absorption rate of the absorption layer 40 is greater than 1; therefore, the embodiment of the present application provides the absorption layer 40 on the first retaining wall 21 of the pixel definition layer 20 and / or in the ink storage tank 201, and the water absorption rate of the absorption layer 40 is greater than 1, and then in the process of manufacturing the display panel, the absorption layer 40 can effectively absorb ink, increase the amount of ink in the non-display area 102, increase the solvent atmosphere at the edge of the display panel, balance the solvent evaporation rate of different areas of the display panel, and thus effectively improve the film formation uniformity of the pixel printing part 31 in the display panel, and improve the luminous efficiency and yield of the display panel.

[0064] It is understandable that the absorption layer 40 can effectively absorb the ink. When the absorption layer 40 absorbs the ink during the inkjet printing process, the ink absorbed in the absorption layer 40 can evaporate in the subsequent curing film forming process to increase the solvent atmosphere.

[0065] In some embodiments, the water absorption of the absorption layer 40 is greater than the water absorption of the first retaining wall 21, and the water absorption rate of the absorption layer 40 may be greater than or equal to 5; further, the water absorption rate of the absorption layer 40 may be greater than or equal to 10; further, the water absorption rate of the absorption layer 40 may be greater than or equal to 50; further, the water absorption rate of the absorption layer 40 may be greater than or equal to 100.

[0066] In addition, since the ink storage capacity in the non-display area 102 can be increased by adding an absorption layer 40 in the embodiment of the present application, the embodiment of the present application can also reduce the width of the ink storage tank 201 on the basis of ensuring the same ink storage capacity, and thus reduce the width of the non-display area 102, which is conducive to achieving a narrow frame of the display panel.

[0067] In some embodiments, a three-dimensional network structure and / or a porous structure is distributed in the absorption layer 40 , thereby resulting in more micro spaces in the absorption layer 40 , which can facilitate the absorption of ink by the absorption layer 40 .

[0068] In some embodiments, the water absorption rate of the absorption layer 40 can be greater than or equal to 100 times and less than or equal to 1000 times, and the material of the absorption layer 40 can be a highly absorbent resin material, for example, it can include one or more highly absorbent resins such as polyvinyl alcohol (PVA), polyacrylic acid (PAA) and PVV-PAA copolymer.

[0069] Among them, the absorption layer 40 can use the above-mentioned materials, and use solution coating method, inkjet printing method and other methods to form an intermediate film on the first retaining wall 21 and / or in the ink storage tank 201, and then solidify the intermediate film to form the absorption layer 40, and the formed absorption layer 40 has a three-dimensional network structure and / or porous structure, which is conducive to achieving high water absorption of the absorption layer 40.

[0070] In some embodiments, please refer to Figure 1 The absorption layer 40 can be located on the side of the first retaining wall 21 away from the array substrate 10 and on the side wall and bottom surface of the ink storage tank 201. That is to say, the absorption layer 40 can cover the entire non-display area 102. When ink is formed in the non-display area 102, the absorption layer 40 can absorb the ink to the greatest extent, so as to more effectively increase the solvent atmosphere in the edge area of the display panel.

[0071] In some embodiments, please refer to Figure 2 An absorption layer 40 is provided in the ink storage tank 201 , and the absorption layer 40 is located on the bottom surface of the ink storage tank 201 , thereby being able to effectively absorb the ink formed in the ink storage tank 201 .

[0072] In some embodiments, please refer to Figure 3 An absorption layer 40 is provided in the ink storage tank 201 , and the absorption layer 40 is located on the side wall of the ink storage tank 201 , thereby being able to effectively absorb the ink formed in the ink storage tank 201 .

[0073] In some embodiments, please refer to Figure 4 An absorption layer 40 is provided in the ink storage tank 201 , and the absorption layer 40 is located on the side wall and bottom surface of the ink storage tank 201 , thereby being able to effectively absorb the ink formed in the ink storage tank 201 .

[0074] In some embodiments, please refer to Figure 5 The absorption layer 40 is located on a side of the first retaining wall 21 away from the array substrate 10 , and can effectively absorb ink dropped on the first retaining wall 21 .

[0075] In some embodiments, please refer to Figure 6 The absorption layer 40 is located on a side of the first retaining wall 21 away from the array substrate 10 and on a side of the first retaining wall 21 , thereby effectively absorbing ink dripping on the first retaining wall 21 and ink formed in the ink storage tank 201 .

[0076] In some embodiments, when the ink formed in the non-display area 102 is a pure solvent, the ink in the ink reservoir 201 may all evaporate without forming a film. Figure 1 shown.

[0077] In some embodiments, please refer to Figure 7 When the ink formed in the non-display area 102 has a solute, the ink in the ink storage tank 201 can form a film; wherein, the printing layer 30 also includes a virtual printing portion 32 formed in the non-display area 102, and the virtual printing portion 32 is located in the ink storage tank 201.

[0078] It can be understood that the area corresponding to the pixel printing portion 31 can be used for luminescence, while the area corresponding to the virtual printing portion 32 does not have the function of luminescence; when an absorption layer 40 is formed in the ink storage tank 201, the virtual printing portion 32 is arranged on the absorption layer 40, specifically, it can be located on the side of the absorption layer 40 away from the array substrate 10, or on the side of the absorption layer 40 away from the first retaining wall 21.

[0079] In some embodiments, please refer to Figure 8The anode layer 50 may further include a second anode 52 arranged in the non-display area 102. The second anode 52 is arranged on the array substrate 10 and corresponds to the ink storage tank 201. The ink storage tank 201 exposes a side of the second anode 52 away from the array substrate 10, and the virtual printing portion 32 is arranged on a side of the second anode 52 away from the array substrate 10.

[0080] It is understandable that the second anode 52 is separated from the first anode 51 and is insulated, and the second anode 52 may not be connected to the thin film transistor in the array substrate 10, and no signal is loaded, so that the area where the virtual printing part 32 is located does not have the function of emitting light.

[0081] Furthermore, the structure of the ink storage tank 201 in the non-display area 102 is described below, and the absorption layer 40 covering the surface of the first retaining wall 21, the sidewall and the bottom surface of the ink storage tank 201 are used as an example for description.

[0082] In a specific embodiment of this application, please combine Figure 1 、 Figure 9 as well as Figure 10 The ink storage tank 201 can be arranged around the display area 101, and then the absorption layer 40 can also be arranged around the display area 101, which can enhance the solvent atmosphere on all four edges of the display area 101 and further improve the film formation uniformity of multiple pixel printing parts 31.

[0083] In the embodiment of the present application, the pixel definition layer 20 further includes a plurality of second retaining walls 22 and a plurality of third retaining walls 23 disposed within the display area 101 , wherein the second retaining walls 22 extend along the first direction X, and the plurality of second retaining walls 22 are arranged along the second direction Y, the third retaining walls 23 extend along the second direction Y, and the plurality of third retaining walls 23 are arranged along the first direction X, and thus the plurality of second retaining walls 22 and the plurality of third retaining walls 23 intersect to enclose and form a plurality of pixel openings 202 .

[0084] The height of the second retaining wall 22 is greater than that of the third retaining wall 23 , and the plurality of pixel printing portions 31 extending along the first direction X are connected, while two adjacent pixel printing portions 31 along the second direction Y are spaced apart.

[0085] During the manufacturing process of the display panel, ink can flow between two adjacent second blocking walls 22 along the first direction X and be blocked by the second blocking walls 22 in the second direction Y.

[0086] Furthermore, the display area 101 includes a plurality of sub-pixel areas, and the plurality of sub-pixel areas are arranged in an array along the first direction X and the second direction Y. A pixel opening 202 may be provided in each sub-pixel area, and a pixel printing portion 31 is correspondingly provided in each sub-pixel area.

[0087] It can be understood that each pixel opening 202 in the figure corresponds to a sub-pixel area.

[0088] Among them, multiple sub-pixel areas arranged along the first direction X can emit light of the same color, and then multiple pixel printing parts 31 in the multiple sub-pixel areas arranged along the first direction X can print the same ink, so that the ink can flow between two adjacent second retaining walls 22 along the first direction X.

[0089] In some embodiments, the first retaining wall 21 and the second retaining wall 22 can be formed in the same process, so that the height of the first retaining wall 21 is sufficient to block the ink formed in the ink storage tank 201 .

[0090] In which, there can be one ink storage tank 201, and one ink storage tank 201 is arranged around the display area 101, or the ink storage tank 201 can be divided into multiple sub-tanks along the direction surrounding the display area 101, wherein the multiple sub-tanks can be connected end to end to surround the display area 101.

[0091] For example Figure 9 In the embodiment, the ink storage tank 201 is divided into four sub-tanks, and the four sub-tanks are respectively arranged parallel to the four sides of the display area 101.

[0092] In another specific embodiment of this application, please combine Figure 1 、 Figure 11 as well as Figure 12 The ink storage tank 201 can be divided into multiple sub-grooves along the direction surrounding the display area 101. Specifically, the ink storage tank 201 is divided into multiple first sub-grooves 2011 and multiple second sub-grooves 2012 along the direction surrounding the display area 101. The first sub-grooves 2011 are arranged close to the corner of the display area 101, and the second sub-grooves 2012 are located on the side of the first sub-grooves 2011 away from the corner of the display area 101; that is, the minimum distance between the first sub-grooves 2011 and the corner of the display area 101 is smaller than the minimum distance between the second sub-grooves 2012 and the corner of the display area 101.

[0093] The first retaining wall 21 includes a first sub-portion 211 arranged around the first sub-groove 2011 and a second sub-portion 212 arranged around the second sub-groove 2012; it should be noted that the first sub-portion 211 and the second sub-portion 212 are integrally formed. In order to describe the distinction, the embodiment of the present application divides the first retaining wall 21 into different sub-portions in different areas according to the different sub-grooves they surround.

[0094] The absorption layer 40 includes a first absorption part 41 and a second absorption part 42. The first absorption part 41 is arranged on the first sub-part 211 and / or in the first sub-groove 2011, and the second absorption part 42 is arranged on the second sub-part 212 and / or in the second sub-groove 2012. The water absorption of the first absorption part 41 is greater than the water absorption of the second absorption part 42.

[0095] Specifically, in this embodiment, the first absorbing portion 41 is disposed on the first sub-portion 211 and in the first sub-groove 2011, and the second absorbing portion 42 is disposed on the second sub-portion 212 and in the second sub-groove 2012; and the water absorbency of the first absorbing portion 41 is greater than that of the second absorbing portion 42. It should be noted that, through research conducted by the present application, it has been found that because the pixel printing portions 31 located in the corners of the display area 101 are more concentrated, they are more prone to uneven film formation. Therefore, in the embodiment of the present application, by differentially disposing the absorbing layer 40 in different areas, the ink storage capacity in the ink reservoir 201 near the corners of the display area 101 can be increased, thereby further facilitating the uniformity of film formation in the pixel printing portions 31 in the four corners of the display area 101.

[0096] In some embodiments, the thickness of the first absorption part 41 is greater than the thickness of the second absorption part 42 ; thus, the water absorption of the first absorption part 41 can be greater than the water absorption of the second absorption part 42 .

[0097] In some embodiments, the water absorption rate of the material of the first absorption part 41 is greater than the water absorption rate of the material of the second absorption part 42; that is, by using a material with a higher water absorption rate to prepare the first absorption part 41, the water absorption of the first absorption part 41 can be made greater than the water absorption of the second absorption part 42.

[0098] In another specific embodiment of this application, please combine Figure 1 as well as Figure 13 In the display area 101, a plurality of pixel openings 202 are arranged along a first direction X and a second direction Y, and the first direction X and the second direction Y intersect; in the non-display area 102, the ink storage tank 201 includes a plurality of third sub-grooves 2013 arranged along the first direction X and the second direction Y.

[0099] That is, the arrangement of the plurality of third sub-grooves 2013 is the same as that of the plurality of pixel openings 202 , and the size of the third sub-grooves 2013 may also be the same as that of the pixel openings 202 .

[0100] In some embodiments, a portion of the first retaining wall 21 can be manufactured in the same process as the second retaining wall 22 , and another portion of the first retaining wall 21 can be manufactured in the same process as the third retaining wall 23 .

[0101] In addition, in an embodiment of the present application, the display panel may further include an electron transport layer arranged on the side of the printed layer 30 away from the anode layer 50, an electron injection layer arranged on the side of the electron transport layer away from the printed layer 30, a cathode layer arranged on the side of the electron injection layer away from the electron transport layer, and an encapsulation layer arranged on the side of the cathode layer away from the electron injection layer.

[0102] The electron transport layer, the electron injection layer and the cathode layer can be made by an evaporation process, and the encapsulation layer covers the side of the cathode layer away from the electron injection layer to encapsulate and protect the underlying film layer.

[0103] In summary, the embodiment of the present application sets an absorption layer 40 on the first retaining wall 21 of the pixel definition layer 20 and / or in the ink storage tank 201, and the water absorption rate of the absorption layer 40 is greater than 1. Therefore, in the process of manufacturing the display panel, the absorption layer 40 can absorb ink, increase the amount of ink in the non-display area 102, increase the solvent atmosphere at the edge of the display panel, and balance the solvent evaporation rate in different areas of the display panel, thereby effectively improving the film formation uniformity of the pixel printing part 31 in the display panel, and improving the luminous efficiency and yield of the display panel.

[0104] In addition, an embodiment of the present application further provides a display device, which may include the display panel described in the above embodiment.

[0105] It can be understood that, since the display device has the same display panel as that in the above embodiment, the display device has the same beneficial effects as the display panel, which will not be described in detail here.

[0106] In the description of this application, the terms "first" and "second" are used for descriptive purposes only and should not be understood to indicate or imply relative importance or implicitly specify the number of technical features indicated. Therefore, a feature defined as "first" or "second" may explicitly or implicitly include one or more features. In the description of this application, "plurality" means two or more, unless otherwise specifically defined.

[0107] In the above embodiments, the description of each embodiment has its own focus. For parts that are not described in detail in a certain embodiment, reference can be made to the relevant descriptions of other embodiments.

[0108] The embodiments, implementation methods and related technical features of the present application can be combined and replaced with each other without conflict.

[0109] The above are merely preferred embodiments of the present application and do not constitute any form of limitation to the present application. However, any simple modifications, equivalent changes, and modifications made to the above embodiments based on the technical essence of the present application without departing from the content of the technical solution of the present application are still within the scope of the technical solution of the present application.

Claims

1. A display panel, characterized in that: The display panel includes a display area and a non-display area adjacent to the display area; The display panel further includes: a pixel definition layer, wherein a plurality of pixel openings located in the display area, an ink storage tank located in the non-display area, and a first retaining wall disposed around the ink storage tank are formed in the pixel definition layer; a printing layer comprising a pixel printing portion disposed within the plurality of pixel openings; an absorption layer, disposed in the non-display area; Wherein, the absorption layer is arranged on the first retaining wall and / or in the ink storage tank, and the water absorption rate of the absorption layer is greater than 1.

2. The display panel according to claim 1, wherein: The absorption layer has a three-dimensional network structure and / or a porous structure distributed therein.

3. The display panel according to claim 1, wherein: The absorption layer is provided in the ink storage tank, and the absorption layer is located on the side wall and / or bottom surface of the ink storage tank.

4. The display panel according to claim 1, wherein: The absorption layer is located on at least a portion of the surface of the first retaining wall.

5. The display panel according to any one of claims 1 to 4, characterized in that: The ink storage tank is arranged around the display area, and the absorption layer is arranged around the display area.

6. The display panel according to claim 5, wherein: The ink storage tank is divided into a plurality of first sub-slots and a plurality of second sub-slots along a direction surrounding the display area, wherein the first sub-slots are arranged near a corner of the display area, and the second sub-slots are located on a side of the first sub-slot away from the corner of the display area; The first retaining wall includes a first sub-portion arranged around the first sub-groove and a second sub-portion arranged around the second sub-groove, the absorption layer includes a first absorption portion and a second absorption portion, the first absorption portion is arranged on the first sub-portion and / or in the first sub-groove, the second absorption portion is arranged on the second sub-portion and / or in the second sub-groove, and the water absorption of the first absorption portion is greater than the water absorption of the second absorption portion.

7. The display panel according to claim 6, wherein: The thickness of the first absorbent portion is greater than that of the second absorbent portion.

8. The display panel according to claim 6, wherein: The water absorption rate of the material of the first absorption part is greater than the water absorption rate of the material of the second absorption part.

9. The display panel according to any one of claims 1 to 4, characterized in that: In the display area, the plurality of pixel openings are arranged along a first direction and a second direction, and the first direction and the second direction intersect; In the non-display area, the ink storage tank includes a plurality of third sub-tanks arranged along the first direction and the second direction.

10. The display panel according to any one of claims 1 to 4, characterized in that: The printing layer further includes a dummy printing portion disposed in the ink storage tank. When the absorbing layer is disposed in the ink storage tank, the dummy printing portion is disposed on the absorbing layer.

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