Display panel and display equipment

Abstract

The embodiment of the invention discloses a display panel and a display device. A pixel definition structure layer comprises a first pixel definition layer and a second pixel definition layer arranged on the first pixel definition layer. In the redundant pixel region, the first pixel definition layer and the second pixel definition layer are connected in a crossed manner to form a plurality of redundant openings, and the redundant openings expose the flat layer. According to the embodiment of the invention, the flat layer is directly exposed based on the redundant opening, that is, the area of the redundant opening is not provided with an anode, so that compared with a display area, the depth of the redundant opening is larger than that of the pixel opening, the redundant opening can accommodate more solvents, the thickness uniformity of the effective light-emitting functional layer is improved, and the width of the redundant pixel area is reduced.

Description

Technical Field

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

[0002] For inkjet-printed organic light-emitting diode panels, the drying atmosphere is different due to the different saturated vapor pressures in the traditional redundant pixel area and the display area, and the traditional redundant pixel area carries a limited amount of solvent, which cannot completely eliminate the edge effect.

[0003] It should be noted that in the linear pixel definition layer, by printing the sub-pixel openings of the entire column or row at one time, the printing ink of the entire column or row is connected. Due to the edge effect, the evaporation rate of the edge area is faster, so that the solute of the ink will gradually move to the edge with the solvent, resulting in a thicker film closer to the edge. In order to ensure the uniformity of the printed film layer in the display area, it is usually necessary to expand the area of ​​the redundant pixel area, resulting in an increase in the border of the display substrate and an inability to achieve a narrow border. Summary of the invention

[0004] Embodiments of the present application provide a display panel and a display device, which can reduce the redundant pixel area to achieve a narrow frame.

[0005] An embodiment of the present application provides a display panel, including a display area and a redundant pixel area, wherein the redundant pixel area is arranged on at least one side of the display area, and the display panel includes:

[0006] Flat layer;

[0007] an anode layer, disposed on the flat layer, the anode layer comprising a plurality of anodes, and the anodes are disposed in the display area;

[0008] A pixel definition structure layer is arranged on a side of the anode layer away from the planar layer, the pixel definition structure layer comprises a first pixel definition layer and a second pixel definition layer arranged on the first pixel definition layer, the first pixel definition layer and the second pixel definition layer are arranged cross-connected;

[0009] In the display area, the first pixel definition layer and the second pixel definition layer are cross-connected to form a plurality of pixel openings, and the pixel openings expose the anode; in the redundant pixel area, the first pixel definition layer and the second pixel definition layer are cross-connected to form a plurality of redundant openings, and the redundant openings expose the planar layer.

[0010] Optionally, in some embodiments of the present application, the display panel includes an effective light-emitting functional layer and a redundant light-emitting functional layer, the effective light-emitting functional layer is arranged in the pixel opening, and the redundant light-emitting functional layer is arranged in the redundant opening;

[0011] The number of film layers of the redundant light-emitting functional layer is less than the number of film layers of the effective light-emitting functional layer.

[0012] Optionally, in some embodiments of the present application, the effective light-emitting functional layer includes a hole injection layer, a hole transport layer, a light-emitting layer, an electron transport layer and an electron injection layer, the redundant light-emitting functional layer includes the electron transport layer and the electron injection layer, and the redundant light-emitting functional layer does not include at least one of the hole injection layer, the hole transport layer and the light-emitting layer.

[0013] Optionally, in some embodiments of the present application, in the first direction in the display area, the hole injection layer, the hole transport layer and the light-emitting layer extend to cover a plurality of the pixel openings, and in the second direction, the first blocking wall simultaneously separates two adjacent hole injection layers, two adjacent hole transport layers and two adjacent light-emitting layers.

[0014] Optionally, in some embodiments of the present application, the first pixel definition layer includes a second barrier wall, the second pixel definition layer includes a first barrier wall, a third barrier wall and a fourth barrier wall, a plurality of the second barrier walls, the third barrier wall and the fourth barrier wall are arranged in the first direction, a plurality of the first barrier walls are arranged in the second direction, and the thickness of the first barrier wall, the third barrier wall and the fourth barrier wall is greater than the thickness of the second barrier wall;

[0015] A plurality of the first retaining walls and a plurality of the second retaining walls are arranged in the display area and the redundant pixel area; the third retaining wall is arranged at the junction of the display area and the redundant pixel area, and is configured to separate the display area and the redundant pixel area, and in the first direction, the fourth retaining wall is away from the display area and is located at the outer edge of the redundant pixel area;

[0016] In the display area, the first barrier wall and the second barrier wall are cross-connected to form a plurality of pixel openings, and the pixel openings expose the anode; in the redundant pixel area, the first barrier wall and the second barrier wall are cross-connected to form a plurality of redundant openings.

[0017] Optionally, in some embodiments of the present application, the third retaining wall and the fourth retaining wall are respectively arranged on the same layer as the first retaining wall and are integrally connected.

[0018] Optionally, in some embodiments of the present application, in the first direction, the distance between the third retaining wall and the fourth retaining wall is less than or equal to 1 mm.

[0019] Optionally, in some embodiments of the present application, the pixel definition structure layer also includes a fifth barrier wall arranged in an edge area of ​​the display area, the thickness of the fifth barrier wall is greater than the thickness of the second barrier wall, and in the first direction, the fifth barrier wall is arranged on a side of the third barrier wall away from the fourth barrier wall, and the area between the third barrier wall and the fifth barrier wall has a plurality of pixel openings.

[0020] Optionally, in some embodiments of the present application, the pixel definition structure layer also includes a sixth barrier wall arranged in the redundant pixel area, the thickness of the sixth barrier wall is greater than the thickness of the second barrier wall, and in the first direction, the sixth barrier wall is arranged between the third barrier wall and the fourth barrier wall, and a first redundant sub-area of ​​the redundant pixel area is defined between the third barrier wall and the sixth barrier wall, and a second sub-area of ​​the redundant pixel area is defined between the sixth barrier wall and the fourth barrier wall.

[0021] Optionally, in some embodiments of the present application, in the first direction, the distance between the third retaining wall and the fourth retaining wall is less than or equal to 0.5 mm.

[0022] Optionally, in some embodiments of the present application, in the first direction, the display area includes a middle area and side areas located on both sides of the middle area, the fifth retaining wall is arranged at the junction of the middle area and the side area, and is configured to separate the middle area from the side area; the effective light-emitting functional layer includes a first light-emitting portion arranged in the middle area and a second light-emitting portion arranged in the side area;

[0023] The plurality of pixel openings include a first opening disposed in the middle region and a second opening disposed in the side region, the first light-emitting portion is disposed in the first opening, and the second light-emitting portion is disposed in the second opening; the first light-emitting portion includes a first effective light-emitting sub-portion and a first edge sub-portion surrounding and connecting the first effective light-emitting sub-portion, the thickness of the first edge sub-portion is greater than the thickness of the first effective light-emitting sub-portion, the second light-emitting portion includes a second effective light-emitting sub-portion and a second edge sub-portion surrounding and connecting the second effective light-emitting sub-portion, the thickness of the second edge sub-portion is greater than the thickness of the second effective light-emitting sub-portion;

[0024] The thickness of the first effective light-emitting sub-portion is equal to the thickness of the second effective light-emitting sub-portion, and the thickness of the second edge sub-portion is greater than the thickness of the first edge sub-portion.

[0025] Optionally, in some embodiments of the present application, the pixel definition structure layer further includes a seventh barrier wall disposed in the display area, the thickness of the seventh barrier wall is greater than the thickness of the second barrier wall, and in the first direction, the seventh barrier wall is disposed between the third barrier wall and the fifth barrier wall;

[0026] In the first direction, the display area includes a middle area and side areas located on both sides of the middle area, the fifth retaining wall is arranged at the junction of the middle area and the side area, and is configured to separate the middle area from the side area, and the side area includes a first sub-area and a second sub-area;

[0027] The first sub-area is defined between the third retaining wall and the seventh retaining wall, and the second sub-area is defined between the seventh retaining wall and the fifth retaining wall;

[0028] In the first direction, a distance between the third retaining wall and the fourth retaining wall is less than or equal to 0.3 mm.

[0029] Optionally, in some embodiments of the present application, the depths of all the pixel openings in the display area are equal, the opening area of ​​the pixel openings in the second sub-area is larger than the opening area of ​​the pixel openings in the first sub-area, and the opening area of ​​the pixel openings in the first sub-area is larger than the opening area of ​​the pixel openings in the middle area.

[0030] Optionally, in some embodiments of the present application, an opening area of ​​the pixel opening in the second sub-region is larger than an opening area of ​​a redundant opening adjacent to the second sub-region in the redundant pixel area.

[0031] Optionally, in some embodiments of the present application, the effective light-emitting functional layer includes a first light-emitting portion arranged in the middle region, a second light-emitting portion arranged in the first sub-region, and a third light-emitting portion arranged in the second sub-region;

[0032] The plurality of pixel openings include a first opening arranged in the middle area, a second opening arranged in the first sub-area, and a third opening arranged in the second sub-area; the first light-emitting portion is arranged in the first opening, the second light-emitting portion is arranged in the second opening, and the third light-emitting portion is arranged in the third opening; the first light-emitting portion includes a first effective light-emitting sub-portion and a first edge sub-portion surrounding and connecting the first effective light-emitting sub-portion, the thickness of the first edge sub-portion is greater than the thickness of the first effective light-emitting sub-portion; the second light-emitting portion includes a second effective light-emitting sub-portion and a second edge sub-portion surrounding and connecting the second effective light-emitting sub-portion, the thickness of the second edge sub-portion is greater than the thickness of the second effective light-emitting sub-portion; the third light-emitting portion includes a third effective light-emitting sub-portion and a third edge sub-portion surrounding and connecting the third effective light-emitting sub-portion, the thickness of the third edge sub-portion is greater than the thickness of the third effective light-emitting sub-portion;

[0033] The thickness of the first effective light-emitting sub-portion, the thickness of the second effective light-emitting sub-portion and the thickness of the third effective light-emitting sub-portion are equal, the thickness of the second edge sub-portion is greater than the thickness of the first edge sub-portion, and the thickness of the third edge sub-portion is greater than the thickness of the second edge sub-portion.

[0034] Optionally, in some embodiments of the present application, the third retaining wall, the fourth retaining wall and the fifth retaining wall are respectively arranged on the same layer as the first retaining wall and are integrally connected.

[0035] Optionally, in some embodiments of the present application, the first retaining wall, the third retaining wall and the fourth retaining wall are connected to define a receiving groove, and the receiving groove is configured to accommodate a solvent of a corresponding ink material in a process of forming at least one of a hole injection layer, a hole transport layer and a light-emitting layer using an inkjet printing process.

[0036] Correspondingly, an embodiment of the present application further provides a display device, which includes a display panel as described in any one of the above embodiments.

[0037] The display panel and display device of the embodiment of the present application include a display area and a redundant pixel area, the redundant pixel area is arranged on at least one side of the display area, and the display panel includes a planar layer, an anode layer and a pixel definition structure layer. In the display area, the first pixel definition layer and the second pixel definition layer are cross-connected to form a plurality of pixel openings, and the pixel openings expose the anode; in the redundant pixel area, the first pixel definition layer and the second pixel definition layer are cross-connected to form a plurality of redundant openings, and the redundant openings expose the planar layer.

[0038] Since the redundant opening directly exposes the flat layer, that is, there is no anode in the area of ​​the redundant opening, the depth of the redundant opening is greater than the depth of the pixel opening compared to the display area, so that the redundant opening can accommodate more solvent to improve the thickness uniformity of the effective light-emitting functional layer and reduce the width of the redundant pixel area. BRIEF DESCRIPTION OF THE DRAWINGS

[0039] Figure 1 is a schematic diagram of a top view of the structure of a display panel provided in an embodiment of the present application;

[0040] Figure 2 is a schematic cross-sectional structural diagram of a display panel provided in an embodiment of the present application;

[0041] Figure 3 yes Figure 2 A magnified schematic diagram of the M1 part;

[0042] Figure 4 is another schematic diagram of a top view structure of a display panel provided in an embodiment of the present application;

[0043] Figure 5 is another schematic cross-sectional structure diagram of a display panel provided in an embodiment of the present application;

[0044] Figure 6 yes Figure 5 An enlarged schematic diagram of the M2 part;

[0045] Figure 7 is another schematic diagram of a top view structure of a display panel provided in an embodiment of the present application;

[0046] Figure 8 is another schematic cross-sectional structure diagram of a display panel provided in an embodiment of the present application;

[0047] Fig. 9 yes Figure 8 A partial enlarged schematic diagram of the M3 part;

[0048] Fig.10 It is a schematic diagram of the structure of the display device provided in an embodiment of the present application. DETAILED DESCRIPTION

[0049] 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 described embodiments 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. In addition, it should be understood that the specific implementation methods described herein are only used to illustrate and explain the present application, and are not used to limit the present application. In the present application, the various embodiments can be combined with each other but will not be repeated one by one, and in the absence of contrary instructions, the directional words used, such as "upper" and "lower", usually refer to the upper and lower parts of the device in actual use or working state, specifically the drawing direction in the drawings; while "inside" and "outside" refer to the outline of the device; the terms "first", "second", "third", etc. are used only as markings, and no numerical requirements are imposed or order is established.

[0050] The embodiments of the present application provide a display panel and a display device, which are described in detail below. It should be noted that the description order of the following embodiments is not intended to limit the preferred order of the embodiments.

[0051] exist Figure 1 , the first direction F1 may be a direction parallel to one side of the display panel 100 in a plan view, and may be, for example, a transverse direction of the display panel 100. The second direction F2 may be a direction parallel to the other side of the display panel 100 in a plan view, and may be a longitudinal direction of the display panel 100.

[0052] But not limited to this, for example, the first direction F1 and the second direction F2 may be non-vertically intersecting, or the first direction F1 and the second direction F2 may intersect with the side of the display panel 100 respectively, that is, intersect in the lateral direction of the display panel 100, and the first direction F1 and the second direction F2 are inclined directions.

[0053] Please refer to Figures 1 to 3 The embodiment of the present application provides a display panel 100, including a display area AA and a redundant pixel area DA, wherein the redundant pixel area DA is disposed on at least one side of the display area AA. The display panel 100 includes a planar layer 11, an anode layer 12, a pixel definition structure layer 13, an effective light-emitting function layer 141, and a redundant light-emitting function layer 142.

[0054] The anode layer 12 is disposed on the planar layer 11. The anode layer 12 includes a plurality of anodes 12a, and the anodes 12a are disposed in the display area AA.

[0055] The pixel definition structure layer 13 is disposed on the side of the anode layer 12 away from the planar layer 11. The pixel definition structure layer 13 includes a first pixel definition layer p1 and a second pixel definition layer p2 disposed on the first pixel definition layer p1, and the first pixel definition layer p1 and the second pixel definition layer p2 are cross-connected.

[0056] In the display area AA, the first pixel definition layer p1 and the second pixel definition layer p2 are cross-connected to form a plurality of pixel openings 13a, and the pixel openings 13a expose the anode 12a. In the redundant pixel area DA, the first pixel definition layer p1 and the second pixel definition layer p2 are cross-connected to form a plurality of redundant openings 13b, and the redundant openings 13b expose the planar layer 11. The effective light-emitting function layer 141 covers the pixel openings 13a, and the redundant light-emitting function layer 142 covers the redundant openings 13b.

[0057] It can be understood that the display panel 100 of the embodiment of the present application directly exposes the flat layer 11 based on the redundant opening 13b, that is, there is no anode in the area of ​​the redundant opening 13b. Therefore, compared with the display area AA, the depth of the redundant opening 13b is greater than the depth of the pixel opening 13a, so that the redundant opening 13b can accommodate more solvent to improve the thickness uniformity of the effective light-emitting functional layer and reduce the width of the redundant pixel area DA.

[0058] Optionally, in some embodiments, the pixel definition structure layer 13 includes a first retaining wall 131, a second retaining wall 132, a third retaining wall 133 and a fourth retaining wall 134, a plurality of second retaining walls 132, a third retaining wall 133 and a fourth retaining wall 134 are arranged in the first direction F1, and a plurality of first retaining walls 131 are arranged in the second direction F2. The thickness of the first retaining wall 131, the third retaining wall 133 and the fourth retaining wall 134 is greater than the thickness of the second retaining wall 132.

[0059] A plurality of first retaining walls 131 and a plurality of second retaining walls 132 are disposed in the display area AA and the redundant pixel area DA. A third retaining wall 133 is disposed at the junction of the display area AA and the redundant pixel area DA and is configured to separate the display area AA from the redundant pixel area DA. In the first direction F1, the fourth retaining wall 134 is away from the display area AA and is located at the outer edge of the redundant pixel area DA.

[0060] In the display area AA, the first barrier wall 131 and the second barrier wall 132 are cross-connected to form a plurality of pixel openings 13a, and the pixel openings 13a expose the anode 12a. In the redundant pixel area DA, the first barrier wall 131 and the second barrier wall 132 are cross-connected to form a plurality of redundant openings 13b.

[0061] Optionally, the first pixel definition layer p1 includes the second retaining wall 132, and the second pixel definition layer p2 includes the first retaining wall 131, the third retaining wall 133 and the fourth retaining wall 134. It should be noted that the first retaining wall 131, the second retaining wall 132, the third retaining wall 133 and the fourth retaining wall 134 are not limited to forming the above-mentioned first pixel definition layer p1 and the second pixel definition layer p2, and the four may also be in other same-layer forms, such as the second retaining wall 132, the third retaining wall 133 and the fourth retaining wall 134 are located in the same layer, or any two of the first retaining wall 131, the second retaining wall 132, the third retaining wall 133 and the fourth retaining wall 134 are in one layer, and so on.

[0062] It can be understood that the display panel 100 of the embodiment of the present application uses the third blocking wall 133 to separate the display area AA and the redundant pixel area DA, so that the ink communication channels of the sub-pixel rows arranged along the first direction F1 are blocked, so that in the process of drying the ink material film layer, the risk of the solute of the ink in the display area AA moving to the redundant pixel area DA due to the edge effect is avoided, thereby improving the uniformity of the effective light-emitting functional layer in the display area AA; in addition, based on the fact that the third blocking wall 133 and the fourth blocking wall 134 are relatively high, more solvents can be accommodated to balance the drying atmosphere of the display area AA and the redundant pixel area DA, thereby reducing the width of the redundant pixel area DA and further improving the uniformity of the ink material film layer.

[0063] It should be understood that the material of at least part of the film layer of the pixel definition structure layer is flat. Therefore, under the same thickness of flat material, since there is no anode, the flat height of the flat material is not overlapped with the thickness of the anode, so that the depth of the redundant opening 13b can be deeper, so as to accommodate more solvent.

[0064] Optionally, the redundant pixel area DA is arranged around the edges of the display area AA. In the first direction F1, the third retaining wall 133 and the fourth retaining wall 134 define a first redundant area of ​​the redundant pixel area DA, and the two first redundant areas are arranged on opposite sides of the display area AA; in the second direction F2, a third retaining wall 133 and two first retaining walls 131 define a second redundant area of ​​the redundant pixel area DA, and the two second redundant areas are arranged on another opposite side of the display area AA.

[0065] It can be understood that the display panel 100 also includes a driving substrate having a planar layer 11, the driving substrate includes a substrate, a thin film transistor structure layer arranged on the substrate, and a planar layer 11 arranged on the thin film transistor structure layer, and the driving substrate is configured to drive the effective light-emitting functional layer 141 to emit light.

[0066] Optionally, the effective light-emitting functional layer 141 is disposed in the pixel opening 13 a , and the redundant light-emitting functional layer 142 is disposed in the redundant opening 13 b , wherein the number of film layers of the redundant light-emitting functional layer 142 is less than the number of film layers of the effective light-emitting functional layer 141 .

[0067] It can be understood that the first retaining wall 131, the third retaining wall 133 and the fourth retaining wall 134 are connected to define a receiving groove 13c, and the receiving groove 13c is configured to receive the solvent of the ink material in the process of forming the ink material film layer by the inkjet printing process. The ink material includes a solute and a solvent, and the ink material forms a film layer in the effective light-emitting functional layer after drying.

[0068] Based on the ink material being printed in the display area AA in the process of forming the ink material film layer by the inkjet printing process, the redundant pixel area DA only prints the solvent in the ink material, and the solvent volume per unit area in the redundant pixel area DA is greater than the solvent volume per unit area in the display area AA, so that during the drying process, the saturated vapor pressure of the redundant pixel area DA and the display area AA can be balanced, thereby balancing the overall drying atmosphere and improving the film formation uniformity of the ink material film layer in the display area AA. Secondly, the receiving groove 13c can accommodate more solvent without expanding the width of the redundant pixel area DA, and based on the fact that the receiving groove 13c can accommodate more solvent, the effect of reducing the width of the redundant pixel area DA can be achieved.

[0069] At the same time, since only the solvent is printed in the redundant pixel area DA, there is no ink material layer in the redundant pixel area DA. Optionally, the ink material includes at least one of a hole injection material, a hole transport material, and a luminescent material. For example, when the luminescent material is printed in the display area AA, the solvent of the luminescent material is printed in the redundant pixel area DA. After drying and forming a film, the luminescent material forms a luminescent layer, the solvent in the redundant pixel area DA is volatilized, and the redundant opening 13b remains blank.

[0070] Optionally, in some embodiments, the effective light-emitting functional layer 141 includes a hole injection layer 14a, a hole transport layer 14b, a light-emitting layer 14c, an electron transport layer 14d, and an electron injection layer 14f. Based on this, the receiving groove 13c is configured to receive a solvent of a corresponding ink material in a process of forming at least one of the hole injection layer 14a, the hole transport layer 14b, and the light-emitting layer 14c using an inkjet printing process.

[0071] Optionally, in some embodiments of the present application, the effective light-emitting functional layer 141 includes a hole injection layer 14a, a hole transport layer 14b, a light-emitting layer 14c, an electron transport layer 14d and an electron injection layer 14f, and the redundant light-emitting functional layer 142 includes an electron transport layer 14d and an electron injection layer 14f. The redundant light-emitting functional layer 142 does not include at least one of the hole injection layer 14a, the hole transport layer 14b, and the light-emitting layer 14c.

[0072] It can be understood that in the process of preparing the hole injection layer 14a, the hole transport layer 14b, and the light-emitting layer 14c, the corresponding solvent can be printed in the redundant pixel area DA during the preparation of any one of the film layers; or the corresponding solvent can be printed in the redundant pixel area DA during the preparation of any two of the film layers; or, in the preparation of all the film layers, the corresponding solvent can be printed in the redundant pixel area DA.

[0073] In some embodiments of the present application, in the first direction F1 in the display area AA, the hole injection layer 14a, the hole transport layer 14b, and the light emitting layer 14c extend to cover the plurality of pixel openings 13a. In the second direction F2, the first retaining wall 131 simultaneously separates two adjacent hole injection layers 14a, two adjacent hole transport layers 14b, and two adjacent light emitting layers 14c.

[0074] It can be understood that two adjacent first retaining walls 131 define a row of sub-pixels. Since the second retaining wall 132 is shorter, the adjacent pixel openings 13a separated by the second retaining wall 132 can be connected. Therefore, when inkjet printing is performed in the display area AA, an ink layer can be printed in a row at one time to reduce the printing difficulty and improve the printing efficiency.

[0075] Optionally, in some embodiments of the present application, the third retaining wall 133 and the fourth retaining wall 134 are respectively arranged on the same layer as the first retaining wall 131 and are integrally connected.

[0076] It is understandable that in the process of forming the pixel definition structure layer 13, the second retaining wall 132 is first formed on the flat layer 11, wherein the material of the second retaining wall 132 is an organic material, such as transparent photoresist, polyimide, etc. Then, the first retaining wall 131, the third retaining wall 133 and the fourth retaining wall 134 are formed on the second retaining wall 132 at one time using the same photomask to save process steps.

[0077] Optionally, the first retaining wall 131 , the third retaining wall 133 , and the fourth retaining wall 134 are made of the same material and have the same thickness.

[0078] Optionally, in some embodiments, a half-tone mask may be used to form the first barrier wall 131, the third barrier wall 133 and the fourth barrier wall 134, wherein the thickness of the first barrier wall 131, the third barrier wall 133 and the fourth barrier wall 134 located in the redundant pixel area DA is greater than the thickness of the first barrier wall 131 located in the display area AA, so as to increase the solvent capacity of the redundant pixel area DA and further reduce the width of the redundant pixel area DA.

[0079] Optionally, in some embodiments of the present application, in the first direction F1, the distance between the third retaining wall 133 and the fourth retaining wall 134 is less than or equal to 1 mm.

[0080] It can be understood that the receiving groove 13c formed based on the redundant pixel area DA formed by the first retaining wall 131, the third retaining wall 133 and the fourth retaining wall 134 has a larger volume and can accommodate more volume. In fact, in order to ensure that the solvent does not overflow the redundant pixel area DA and without expanding the display area AA, since the thickness of the first retaining wall 131, the third retaining wall 133 and the fourth retaining wall 134 is relatively large, the depth of the receiving groove 13c is relatively large. Based on the consideration of the balanced drying atmosphere of the redundant pixel area DA and the display area AA, the height of the solvent can be relatively low and the width of the redundant pixel area DA can be relatively large. Therefore, based on the requirements of not expanding the display area AA and slightly reducing the redundant pixel area DA, the distance between the third retaining wall 133 and the fourth retaining wall 134 in the first direction F1 can be selected to be less than or equal to 1 mm, for example, it can be 1 mm, 0.9 mm, 0.8 mm, 0.7 mm, 0.6 mm, 0.5 mm, 0.4 mm, 0.3 mm, 0.2 mm or 0.1 mm, etc.

[0081] The method for manufacturing the display panel 100 in some embodiments of the present application includes the following steps:

[0082] Step B01 , providing a printed substrate, wherein the printed substrate includes a planar layer 11 , an anode layer 12 and a pixel definition structure layer 13 .

[0083] Step B02, printing a solvent in the redundant pixel area DA. The depth of the solvent can be adaptively adjusted according to the area of ​​the redundant pixel area DA. The larger the area of ​​the redundant pixel area DA, the shallower the depth of the solvent can be. The first solvent is printed first to protect the printing atmosphere.

[0084] Step B03, printing the corresponding ink in the display area AA. For example, if the solvent is the solvent of the hole injection layer 14a, the ink is the material ink of the hole injection layer 14a; if the solvent is the solvent of the hole transport layer 14b, the ink is the material ink of the hole transport layer 14b; if the solvent is the solvent of the light-emitting layer 14c, the ink is the material ink of the light-emitting layer 14c.

[0085] Step B04 , drying the ink to form a layer of the effective light-emitting functional layer 141 .

[0086] Step B05, continue to dry the solvent to remove the solvent. It is understandable that, since the amount of solvent in the redundant pixel area DA is larger, the solvent in the display area AA will evaporate first, while the solvent in the redundant pixel area DA will remain, so it is necessary to continue to dry and remove the solvent.

[0087] It should be noted that step B02 to step B05 is a cycle step. When an ink material layer is formed, the next cycle begins until all ink material layers form the film layer of the effective light-emitting functional layer 141 .

[0088] For example, the solvent of the hole injection layer 14a is first printed in the redundant pixel area DA, and then the ink of the hole injection layer 14a is printed in the display area AA, and then the ink of the hole injection layer 14a is dried to form the hole injection layer 14a, and finally the solvent of the hole injection layer 14a is dried to remove, thus completing the cycle step of preparing a film layer. After the hole injection layer 14a is formed, the next cycle is entered, the solvent of the hole transport layer 14b is printed in the redundant pixel area DA, and then the ink of the hole transport layer 14b is printed in the display area AA, and then the ink of the hole transport layer 14b is dried to form the hole transport layer 14b, and finally the solvent of the hole transport layer 14b is dried to remove. After the hole transport layer 14b is formed, the next cycle is entered, the solvent of the light-emitting layer 14c is printed in the redundant pixel area DA, and then the ink of the light-emitting layer 14c is printed in the display area AA, and then the ink of the light-emitting layer 14c is dried to form the light-emitting layer 14c, and finally the solvent of the light-emitting layer 14c is dried to remove.

[0089] Step B06, forming an electron transport layer 14d, an electron injection layer 14f and a cathode 15 in sequence on the light emitting layer 14c.

[0090] Optionally, an evaporation process or a sputtering process may be used to form the entire electron transport layer 14d, the electron injection layer 14f and the cathode 15.

[0091] The electron transport layer 14d, the electron injection layer 14f and the cathode 15 all cover the display area AA and the redundant pixel area DA. The hole injection layer 14a, the hole transport layer 14b, the light emitting layer 14c, the electron transport layer 14d and the electron injection layer 14f of the display area AA form an effective light emitting functional layer 141. The electron transport layer 14d and the electron injection layer 14f of the redundant pixel area DA form a redundant light emitting functional layer 142.

[0092] Figure 4 FIG. 1 is another schematic diagram of a top view of the display panel 100 according to an embodiment of the present application. Figure 5 The shown is based on Figure 4Schematic diagram of a cross-sectional structure of a display panel 100.

[0093] exist Figure 4 and Figure 5 In the present invention, parts different from those of the above-described embodiment will be described to avoid redundant description.

[0094] Please refer to Figure 4 and Figure 5 In some embodiments of the present application, the pixel definition structure layer 13 further includes a fifth barrier wall 135 disposed in the edge region of the display area AA. The thickness of the fifth barrier wall 135 is greater than the thickness of the second barrier wall 132. In the first direction F1, the fifth barrier wall 135 is disposed on a side of the third barrier wall 133 away from the fourth barrier wall 134. The area between the third barrier wall 133 and the fifth barrier wall 135 has a plurality of pixel openings 13a.

[0095] It is understandable that, since the redundant pixel area DA can accommodate more solvent, the width of the redundant pixel area DA can be further reduced by printing a darker solvent, and the display area AA can be expanded. Secondly, the fifth retaining wall 135 is used to separate the two side areas and the middle area of ​​the display area AA, further reducing the risk of the solvent in the middle area of ​​the display area AA flowing to the two side areas, and improving the film formation uniformity of the ink material layer in the display area AA.

[0096] Optionally, in the first direction F1, the distance between the third retaining wall 133 and the fourth retaining wall 134 is less than or equal to 0.5 mm, for example, 0.5 mm, 0.4 mm, 0.3 mm, 0.2 mm or 0.1 mm.

[0097] Optionally, in some embodiments of the present application, the pixel definition structure layer 13 also includes a sixth barrier wall 136 disposed in the redundant pixel area DA, the thickness of the sixth barrier wall 136 is greater than the thickness of the second barrier wall 132, and in the first direction F1, the sixth barrier wall 136 is disposed between the third barrier wall 133 and the fourth barrier wall 134, and a first redundant sub-area DA1 of the redundant pixel area DA is defined between the third barrier wall 133 and the sixth barrier wall 136, and a second sub-area DA2 of the redundant pixel area DA is defined between the sixth barrier wall 136 and the fourth barrier wall 134.

[0098] It can be understood that the gas pressure saturation is lower in the area closer to the edge, so less solvent can be printed in the first redundant sub-area DA1 and more solvent can be printed in the second sub-area DA2 to better balance the overall gas pressure saturation, to better maintain the uniformity of the drying atmosphere, and to further improve the uniformity of the film formation.

[0099] Optionally, in some embodiments of the present application, the third retaining wall 133 , the fourth retaining wall 134 , the fifth retaining wall 135 and the sixth retaining wall 136 are respectively arranged on the same layer as the first retaining wall 131 and are integrally connected.

[0100] It is understandable that the first barrier wall 131 , the third barrier wall 133 , the fourth barrier wall 134 , the fifth barrier wall 135 and the sixth barrier wall 136 are formed on the second barrier wall 132 at one time using the same photomask to save process steps.

[0101] Optionally, the materials and thicknesses of the first retaining wall 131 , the third retaining wall 133 , the fourth retaining wall 134 , the fifth retaining wall 135 and the sixth retaining wall 136 are all the same.

[0102] Optionally, in some embodiments, a multi-tone mask template may be used to form the first barrier wall 131, the third barrier wall 133, the fourth barrier wall 134, the fifth barrier wall 135 and the sixth barrier wall 136, wherein the thickness of the first barrier wall 131, the third barrier wall 133, the fourth barrier wall 134 and the sixth barrier wall 136 located in the first redundant area DA1 is greater than the thickness of the first barrier wall 131 located in the display area AA, and the thickness of the first barrier wall 131, the fourth barrier wall 134 and the sixth barrier wall 136 located in the second redundant area DA2 is greater than the thickness of the third barrier wall 133, so as to further reduce the width of the redundant pixel area DA.

[0103] Please refer to Figure 5 and Figure 6 In some embodiments of the present application, in the first direction F1, the display area AA includes a middle area AA1 and side areas AA2 located on both sides of the middle area AA1. The fifth retaining wall 135 is disposed at the junction of the middle area AA1 and the side area AA2, and is configured to separate the middle area AA1 from the side area AA2. The effective light-emitting functional layer 141 includes a first light-emitting portion 411 disposed in the middle area AA1 and a second light-emitting portion 412 disposed in the side area AA2.

[0104] The plurality of pixel openings 13a include a first opening 311 disposed in the middle area AA1 and a second opening 312 disposed in the side area AA2, and a first light-emitting portion 411 is disposed in the first opening 311. The second light-emitting portion 412 is disposed in the second opening 312. The first light-emitting portion 411 includes a first effective light-emitting sub-portion 41a and a first edge sub-portion 41b surrounding and connecting the first effective light-emitting sub-portion 41a, and the thickness of the first edge sub-portion 41b is greater than the thickness of the first effective light-emitting sub-portion 41a. The second light-emitting portion 412 includes a second effective light-emitting sub-portion 41c and a second edge sub-portion 41d surrounding and connecting the second effective light-emitting sub-portion 41c, and the thickness of the second edge sub-portion 41d is greater than the thickness of the second effective light-emitting sub-portion 41c.

[0105] The thickness of the first effective light emitting sub-portion 41a is equal to the thickness of the second effective light emitting sub-portion 41c. The thickness of the second edge sub-portion 41d is greater than the thickness of the first edge sub-portion 41b.

[0106] It can be understood that in the process of drying the ink material layer, in addition to the influence of the edge effect, it is also affected by the coffee ring effect, wherein the coffee ring effect is caused by the faster evaporation rate of the surrounding edge areas, which causes the solute in the middle area to accumulate with the solvent to the surrounding edge areas to form a film layer with a low middle and high surrounding areas. The middle area of ​​the film layer is the effective area for luminescence, so the thickness uniformity of the middle area of ​​the film layer is the decisive factor for the overall luminescence uniformity of the display panel 100.

[0107] Based on this, since the drying speed is relatively faster in the areas further outward, the solute flows and accumulates more around, and the display area AA is expanded, which further increases the difference in film thickness between the side area AA2 and the middle area AA1. Therefore, the display panel 100 of the embodiment of the present application prints more ink in the side area AA2 and less ink in the middle area AA1. After drying, the thickness of the first effective light-emitting sub-portion 41a is equal to the thickness of the second effective light-emitting sub-portion 41c, thereby improving the uniformity of the film layer of the display panel 100.

[0108] Figure 7 FIG. 1 shows another schematic diagram of a top view of the display panel 100 according to an embodiment of the present application. Figure 8 The shown is based on Figure 7 Schematic diagram of a cross-sectional structure of a display panel 100.

[0109] exist Figure 7 and Figure 8 In the present invention, parts different from those of the above-described embodiment will be described to avoid redundant description.

[0110] Please refer to Figure 7 and Figure 8 In some embodiments of the present application, the pixel definition structure layer 13 further includes a seventh barrier wall 137 disposed in the display area AA, and the thickness of the seventh barrier wall 137 is greater than the thickness of the second barrier wall 132. In the first direction F1, the seventh barrier wall 137 is disposed between the third barrier wall 133 and the fifth barrier wall 135.

[0111] In the first direction F1, the display area AA includes a middle area and side areas located on both sides of the middle area AA1, and the fifth retaining wall 135 is disposed at the junction of the middle area AA1 and the side area AA2, and is configured to separate the middle area AA1 and the side area AA2. The side area AA2 includes a first sub-area a21 and a second sub-area a22.

[0112] A second sub-area a22 is defined between the third retaining wall 133 and the seventh retaining wall 137 , and a first sub-area a21 is defined between the seventh retaining wall 137 and the fifth retaining wall 135 .

[0113] It is understandable that, since the redundant pixel area DA can accommodate more solvent, the width of the redundant pixel area DA can be further reduced and the display area AA can be expanded by printing a deeper solvent, such as full solvent printing. Secondly, the seventh retaining wall 137 is used to separate the two side areas AA2 of the display area AA, further reducing the risk of the solvent in the side area AA2 of the display area AA flowing to the side edge, and improving the uniformity of the film formation of the ink material layer in the display area AA.

[0114] Optionally, in the first direction F1, the distance between the third retaining wall 133 and the fourth retaining wall 134 is less than or equal to 0.3 mm, that is, the width of the redundant pixel area DA is less than or equal to 0.3 mm, for example, may be 0.3 mm, 0.2 mm or 0.1 mm.

[0115] In some embodiments of the present application, the third retaining wall 133 , the fourth retaining wall 134 , the fifth retaining wall 135 and the seventh retaining wall 137 are respectively arranged at the same layer as the first retaining wall 131 and are integrally connected.

[0116] It is understandable that the first barrier wall 131 , the third barrier wall 133 , the fourth barrier wall 134 , the fifth barrier wall 135 and the seventh barrier wall 137 are formed on the second barrier wall 132 at one time using the same photomask to save process steps.

[0117] Optionally, the materials and thicknesses of the first retaining wall 131 , the third retaining wall 133 , the fourth retaining wall 134 , the fifth retaining wall 135 and the seventh retaining wall 137 are all the same.

[0118] Optionally, in some embodiments, a half-tone mask may be used to form the first barrier wall 131, the third barrier wall 133, the fourth barrier wall 134, the fifth barrier wall 135 and the seventh barrier wall 137, wherein the thickness of the first barrier wall 131, the third barrier wall 133 and the fourth barrier wall 134 located in the redundant pixel area DA is greater than the thickness of the first barrier wall 131 located in the display area AA, so as to increase the solvent capacity of the redundant pixel area DA and further reduce the width of the redundant pixel area DA.

[0119] Optionally, in some embodiments of the present application, the depths of all the pixel openings 13a in the display area AA are equal, the opening area of ​​the pixel openings 13a in the second sub-area a22 is larger than the opening area of ​​the pixel openings 13a in the first sub-area a21, and the opening area of ​​the pixel openings 13a in the first sub-area a21 is larger than the opening area of ​​the pixel openings 13a in the intermediate area AA1.

[0120] It can be understood that by improving the opening area of ​​the pixel opening 13a, its volume is increased to accommodate more ink, thereby improving the uniformity of the film layer.

[0121] Optionally, in some embodiments, the volume of the pixel opening 13a can also be increased by adjusting the width of the pixel opening 13a. For example, the width of the pixel opening 13a located in the middle area AA1 is smaller than the width of the pixel opening 13a located in the first sub-area a21, and the width of the pixel opening 13a located in the first sub-area a21 is smaller than the width of the pixel opening 13a located in the second sub-area a22.

[0122] Optionally, in some embodiments of the present application, an opening area of ​​the pixel opening 13a in the second sub-region a22 is larger than an opening area of ​​the redundant opening 13b adjacent to the second sub-region a22 in the redundant pixel area DA.

[0123] It can be understood that, based on the fact that only solvent is printed in the redundant pixel area DA, the redundant opening 13b accommodates more solvent under the same opening volume, and by increasing the opening area of ​​the pixel opening 13a of the second sub-area a22, the amount of solvent accommodated in the edge area of ​​the display area AA can be increased to balance the overall vapor atmosphere and improve the uniformity of the film layer.

[0124] Optionally, in some embodiments, the volume of the pixel opening 13a located in the middle area AA1 is smaller than the volume of the pixel opening 13a located in the first sub-area, and the volume of the pixel opening 13a located in the first sub-area a21 is smaller than the volume of the pixel opening 13a located in the second sub-area a22.

[0125] It can be understood that in the display area AA, the volume of the pixel opening 13a increases from the middle area AA1 toward the edge, and the ink that can be accommodated shows an increasing trend, thereby increasing the saturation of the steam around the display area AA to balance the overall dry atmosphere and improve the uniformity of the film layer.

[0126] Optionally, in some embodiments, the depth of the pixel opening 13a located in the middle area AA1 is less than the depth of the pixel opening 13a located in the first sub-area a21, and the depth of the pixel opening 13a located in the first sub-area a21 is less than the depth of the pixel opening 13a located in the second sub-area a22.

[0127] It is understandable that by improving the depth of the pixel opening 13a and increasing its volume, the consistency of the panel resolution can be maintained, the display uniformity can be improved, and more ink can be accommodated to improve the uniformity of the film layer.

[0128] Optional, see Fig. 9In some embodiments of the present application, the effective light-emitting functional layer 141 includes a first light-emitting portion 411 disposed in the middle area AA1, a second light-emitting portion 412 disposed in the first sub-area a21, and a third light-emitting portion 413 disposed in the second sub-area a22.

[0129] The plurality of pixel openings 13a include a first opening 311 disposed in the middle area AA1, a second opening 312 disposed in the first sub-area a21, and a third opening 313 disposed in the second sub-area a22. A first light-emitting portion 411 is disposed in the first opening 311, a second light-emitting portion 412 is disposed in the second opening 312, and a third light-emitting portion 413 is disposed in the third opening 313. The first light-emitting portion 411 includes a first effective light-emitting sub-portion 41a and a first edge sub-portion 41b surrounding and connecting the first effective light-emitting sub-portion 41a, and the thickness of the first edge sub-portion 41b is greater than the thickness of the first effective light-emitting sub-portion 41a. The second light-emitting portion 412 includes a second effective light-emitting sub-portion 41c and a second edge sub-portion 41d surrounding and connecting the second effective light-emitting sub-portion 41c, and the thickness of the second edge sub-portion 41d is greater than the thickness of the second effective light-emitting sub-portion 41c. The third light emitting portion 413 includes a third effective light emitting sub-portion 41 e and a third edge sub-portion 41 f surrounding and connecting the third effective light emitting sub-portion 41 e , and the thickness of the third edge sub-portion 41 f is greater than the thickness of the third effective light emitting sub-portion 41 e .

[0130] The thickness of the first effective light-emitting sub-portion 41a, the thickness of the second effective light-emitting sub-portion 41c and the thickness of the third effective light-emitting sub-portion 41e are equal, the thickness of the second edge sub-portion 41d is greater than the thickness of the first edge sub-portion 41b, and the thickness of the third edge sub-portion 41f is greater than the thickness of the second edge sub-portion 41d.

[0131] Because the drying speed is relatively faster in the areas further outward, more solute flows and accumulates around, and the display area AA expands, further increasing the difference in film thickness between the side area AA2 and the middle area AA1. Therefore, the display panel 100 of the embodiment of the present application prints the most ink in the second sub-area a22, the second most ink in the first sub-area a21, and the least ink in the middle area AA1. After drying, the thickness of the first effective light-emitting sub-portion 41a, the thickness of the second effective light-emitting sub-portion 41c, and the thickness of the third effective light-emitting sub-portion 41e are equal, thereby improving the uniformity of the film layer of the display panel 100.

[0132] Please refer to Fig.10 The embodiment of the present application further provides a display device 1000, which includes a display panel 100 as described in any one of the above embodiments.

[0133] It should be noted that the structure of the display panel 100 of the display device 1000 of the embodiment of the present application is similar to or the same as the structure of the display panel 100 of the above embodiment. Figures 1 to 8 The relevant explanation will not be repeated here.

[0134] The display device 1000 of the embodiment of the present application includes a display area AA and a redundant pixel area DA, the redundant pixel area DA is arranged on at least one side of the display area AA, and the display panel 100 includes a planar layer 11, an anode layer 12 and a pixel definition structure layer 13. The pixel definition structure layer 13 includes a third barrier wall 133 and a fourth barrier wall 134, and the thickness of the third barrier wall 133 and the fourth barrier wall 134 is greater than the thickness of the second barrier wall 132. The third barrier wall 133 is arranged at the junction of the display area AA and the redundant pixel area DA, and is configured to separate the display area AA and the redundant pixel area DA. In the first direction F1, the fourth barrier wall 134 is away from the display area AA and is located at the outer edge of the redundant pixel area DA. In the display area AA, the first barrier wall 131 and the second barrier wall 132 are cross-connected to form a plurality of pixel openings 13a, and the pixel openings 13a expose the anode 12a. In the redundant pixel area DA, the first barrier wall 131 and the second barrier wall 132 are cross-connected to form a plurality of redundant openings 13b, and the redundant openings 13b expose the planar layer 11.

[0135] It can be understood that the third retaining wall 133 is used to separate the display area AA and the redundant pixel area DA, so that the ink communication channels of the sub-pixel rows arranged along the first direction F1 are blocked, so that in the process of drying the ink material film layer, the risk of the solute of the ink in the display area AA moving to the redundant pixel area DA due to the edge effect is avoided, thereby improving the uniformity of the effective light-emitting functional layer in the display area AA; in addition, based on the fact that the third retaining wall 133 and the fourth retaining wall 134 are relatively high, more solvents can be accommodated to balance the drying atmosphere of the display area AA and the redundant pixel area DA, thereby reducing the width of the redundant pixel area DA and further improving the uniformity of the ink material film layer.

[0136] Secondly, since the redundant opening 13b directly exposes the planar layer 11, that is, there is no anode in the area of ​​the redundant opening 13b, the depth of the redundant opening 13b is greater than the depth of the pixel opening 13a compared to the display area AA, so that the redundant opening 13b can accommodate more solvent to improve the thickness uniformity of the effective light-emitting functional layer and reduce the width of the redundant pixel area DA.

[0137] The above is a detailed introduction to a display panel and a display device provided in the embodiments of the present application. Specific examples are used herein to illustrate the principles and implementation methods of the present application. The description of the above embodiments is only used to help understand the method of the present application and its core idea. At the same time, for technical personnel in this field, according to the idea of ​​the present application, there will be changes in the specific implementation methods and application scope. In summary, the content of this specification should not be understood as a limitation on the present application.

Claims

1. A display panel, comprising a display area and a redundant pixel area, wherein the redundant pixel area is arranged on at least one side of the display area, characterized in that: The display panel comprises: Flat layer; an anode layer, disposed on the flat layer, the anode layer comprising a plurality of anodes, and the anodes are disposed in the display area; A pixel definition structure layer is arranged on a side of the anode layer away from the planar layer, the pixel definition structure layer comprises a first pixel definition layer and a second pixel definition layer arranged on the first pixel definition layer, the first pixel definition layer and the second pixel definition layer are arranged cross-connected; In the display area, the first pixel definition layer and the second pixel definition layer are cross-connected to form a plurality of pixel openings, and the pixel openings expose the anode; in the redundant pixel area, the first pixel definition layer and the second pixel definition layer are cross-connected to form a plurality of redundant openings, and the redundant openings expose the planar layer.

2. The display panel according to claim 1, characterized in that: The display panel comprises an effective light-emitting function layer and a redundant light-emitting function layer, wherein the effective light-emitting function layer is arranged in the pixel opening, and the redundant light-emitting function layer is arranged in the redundant opening; The number of film layers of the redundant light-emitting functional layer is less than the number of film layers of the effective light-emitting functional layer.

3. The display panel according to claim 2, characterized in that: The effective light-emitting functional layer includes a hole injection layer, a hole transport layer, a light-emitting layer, an electron transport layer and an electron injection layer, the redundant light-emitting functional layer includes the electron transport layer and the electron injection layer, and the redundant light-emitting functional layer does not include at least one of the hole injection layer, the hole transport layer and the light-emitting layer.

4. The display panel according to claim 1, characterized in that: The first pixel definition layer includes a second barrier wall, the second pixel definition layer includes a first barrier wall, a third barrier wall and a fourth barrier wall, a plurality of the second barrier walls, the third barrier wall and the fourth barrier wall are arranged in the first direction, a plurality of the first barrier walls are arranged in the second direction, and the thickness of the first barrier wall, the third barrier wall and the fourth barrier wall is greater than the thickness of the second barrier wall; A plurality of the first retaining walls and a plurality of the second retaining walls are arranged in the display area and the redundant pixel area; the third retaining wall is arranged at the junction of the display area and the redundant pixel area, and is configured to separate the display area and the redundant pixel area, and in the first direction, the fourth retaining wall is away from the display area and is located at the outer edge of the redundant pixel area; In the display area, the first barrier wall and the second barrier wall are cross-connected to form a plurality of pixel openings, and the pixel openings expose the anode; in the redundant pixel area, the first barrier wall and the second barrier wall are cross-connected to form a plurality of redundant openings.

5. The display panel according to claim 4, characterized in that: The third retaining wall and the fourth retaining wall are respectively connected integrally with the first retaining wall.

6. The display panel according to claim 4, characterized in that: In the first direction, a distance between the third retaining wall and the fourth retaining wall is less than or equal to 1 mm.

7. The display panel according to claim 4, characterized in that: The pixel definition structure layer also includes a fifth barrier wall arranged in an edge area of ​​the display area, the thickness of the fifth barrier wall is greater than the thickness of the second barrier wall, and in the first direction, the fifth barrier wall is arranged on a side of the third barrier wall away from the fourth barrier wall, and the area between the third barrier wall and the fifth barrier wall has a plurality of pixel openings.

8. The display panel according to claim 7, characterized in that: The pixel definition structure layer also includes a sixth barrier wall arranged in the redundant pixel area, the thickness of the sixth barrier wall is greater than the thickness of the second barrier wall, and in the first direction, the sixth barrier wall is arranged between the third barrier wall and the fourth barrier wall, and a first redundant sub-area of ​​the redundant pixel area is defined between the third barrier wall and the sixth barrier wall, and a second redundant sub-area of ​​the redundant pixel area is defined between the sixth barrier wall and the fourth barrier wall.

9. The display panel according to claim 8, characterized in that: In the first direction, a distance between the third retaining wall and the fourth retaining wall is less than or equal to 0.5 mm.

10. The display panel according to claim 8, characterized in that: In the first direction, the display area includes a middle area and side areas located on both sides of the middle area, the fifth retaining wall is arranged at the junction of the middle area and the side area, and is configured to separate the middle area from the side area; the effective light-emitting functional layer includes a first light-emitting portion arranged in the middle area and a second light-emitting portion arranged in the side area; The plurality of pixel openings include a first opening disposed in the middle region and a second opening disposed in the side region, the first light-emitting portion is disposed in the first opening, and the second light-emitting portion is disposed in the second opening; the first light-emitting portion includes a first effective light-emitting sub-portion and a first edge sub-portion surrounding and connecting the first effective light-emitting sub-portion, the thickness of the first edge sub-portion is greater than the thickness of the first effective light-emitting sub-portion, the second light-emitting portion includes a second effective light-emitting sub-portion and a second edge sub-portion surrounding and connecting the second effective light-emitting sub-portion, the thickness of the second edge sub-portion is greater than the thickness of the second effective light-emitting sub-portion; The thickness of the first effective light-emitting sub-portion is equal to the thickness of the second effective light-emitting sub-portion, and the thickness of the second edge sub-portion is greater than the thickness of the first edge sub-portion.

11. The display panel according to claim 7, characterized in that: The pixel definition structure layer further includes a seventh barrier wall disposed in the display area, the thickness of the seventh barrier wall is greater than the thickness of the second barrier wall, and in the first direction, the seventh barrier wall is disposed between the third barrier wall and the fifth barrier wall; In the first direction, the display area includes a middle area and side areas located on both sides of the middle area, the fifth retaining wall is arranged at the junction of the middle area and the side area, and is configured to separate the middle area from the side area, and the side area includes a first sub-area and a second sub-area; The first sub-region is defined between the third retaining wall and the seventh retaining wall, and the second sub-region is defined between the seventh retaining wall and the fifth retaining wall.

12. The display panel according to claim 11, characterized in that: The depths of all the pixel openings in the display area are equal, the opening area of ​​the pixel openings in the second sub-area is larger than the opening area of ​​the pixel openings in the first sub-area, and the opening area of ​​the pixel openings in the first sub-area is larger than the opening area of ​​the pixel openings in the middle area.

13. The display panel according to claim 12, characterized in that: An opening area of ​​the pixel opening in the second sub-region is larger than an opening area of ​​a redundant opening in the redundant pixel region adjacent to the second sub-region.

14. The display panel according to claim 11, characterized in that: In the first direction, a distance between the third retaining wall and the fourth retaining wall is less than or equal to 0.3 mm.

15. The display panel according to claim 11, characterized in that: The effective light-emitting functional layer includes a first light-emitting portion arranged in the middle region, a second light-emitting portion arranged in the first sub-region, and a third light-emitting portion arranged in the second sub-region; The plurality of pixel openings include a first opening arranged in the middle area, a second opening arranged in the first sub-area, and a third opening arranged in the second sub-area; the first light-emitting portion is arranged in the first opening, the second light-emitting portion is arranged in the second opening, and the third light-emitting portion is arranged in the third opening; the first light-emitting portion includes a first effective light-emitting sub-portion and a first edge sub-portion surrounding and connecting the first effective light-emitting sub-portion, the thickness of the first edge sub-portion is greater than the thickness of the first effective light-emitting sub-portion; the second light-emitting portion includes a second effective light-emitting sub-portion and a second edge sub-portion surrounding and connecting the second effective light-emitting sub-portion, the thickness of the second edge sub-portion is greater than the thickness of the second effective light-emitting sub-portion; the third light-emitting portion includes a third effective light-emitting sub-portion and a third edge sub-portion surrounding and connecting the third effective light-emitting sub-portion, the thickness of the third edge sub-portion is greater than the thickness of the third effective light-emitting sub-portion; The thickness of the first effective light-emitting sub-portion, the thickness of the second effective light-emitting sub-portion and the thickness of the third effective light-emitting sub-portion are equal, the thickness of the second edge sub-portion is greater than the thickness of the first edge sub-portion, and the thickness of the third edge sub-portion is greater than the thickness of the second edge sub-portion.

16. The display panel according to claim 4, characterized in that: The first retaining wall, the third retaining wall and the fourth retaining wall are connected to define a receiving groove, and the receiving groove is configured to receive a solvent of a corresponding ink material in a process of forming at least one of a hole injection layer, a hole transport layer and a light-emitting layer using an inkjet printing process.

17. A display device, characterized in that: Comprising a display panel as described in any one of claims 1-16.

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