Display panel and display device

Abstract

Embodiments of the present application disclose a display panel and a display device. A pixel definition structure layer includes a first pixel definition layer and a second pixel definition layer arranged on the first pixel definition layer. In a 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 flat layer. Embodiments of the present application directly expose the flat layer based on the redundant openings, that is, the area of the redundant openings is free of anodes, and therefore, compared with a display area, the depth of the redundant openings is greater than the depth of a pixel opening, so that the redundant openings can accommodate more solvents, to improve the thickness uniformity of an effective light-emitting functional layer and reduce the width of the redundant pixel area.

Description

TECHNICAL FIELD

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

[0002] For inkjet printing of an organic light-emitting diode panel, the drying atmosphere is different based on the different saturated vapor pressures of the traditional redundant pixel area and the display area, and the amount of solvent carried by the traditional redundant pixel area is limited and cannot completely eliminate the edge effect.

[0003] It should be noted that in the linear pixel definition layer, the printing ink of the whole column or row is connected by one-time printing of the sub-pixel openings of the whole column or row. Due to the influence of the edge effect, the evaporation speed of the edge area is faster, so that the solute of the ink will gradually move to the edge along with the solvent, thereby causing the film to be thicker closer to the edge. In order to ensure the uniformity of the printed film layer in the display area, the area of the redundant pixel area usually needs to be enlarged, resulting in an increase in the frame of the display substrate, which cannot achieve a narrow frame. SUMMARY

[0004] The 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] The embodiments of the present application provide a display panel, which comprises 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 comprises:

[0006] a planar layer;

[0007] an anode layer arranged on the planar layer, the anode layer comprising a plurality of anodes, and the anodes being arranged in the display area;

[0008] a pixel definition structure layer arranged on a side of the anode layer away from the planar layer, the pixel definition structure layer comprising a first pixel definition layer and a second pixel definition layer arranged on the first pixel definition layer, and the first pixel definition layer and the second pixel definition layer being arranged in cross connection;

[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 anodes; 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 comprises an effective light-emitting functional layer and a redundant light-emitting functional layer, the effective light-emitting functional layer is arranged in the pixel openings, and the redundant light-emitting functional layer is arranged in the redundant openings.

[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 pixel openings, and in the second direction, the first barrier 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 walls, and the fourth barrier walls 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] The plurality of first barrier walls and the plurality of second barrier walls are arranged in the display area and the redundant pixel area, the third barrier wall is arranged at the boundary between the display area and the redundant pixel area and is configured to separate the display area and the redundant pixel area, in the first direction, the fourth barrier wall is away from the display area and located at the outer edge of the redundant pixel area.

[0016] In the display area, the first barrier wall and the second barrier wall cross and connect 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 cross and connect to form a plurality of redundant openings.

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

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

[0019] Optionally, in some embodiments of the present application, the pixel definition structure layer further comprises a fifth barrier wall disposed at the edge region of the display area, the thickness of the fifth barrier wall is greater than the thickness of the second barrier wall, in the first direction, the fifth barrier wall is disposed at the side of the third barrier wall away from the fourth barrier wall, and the region 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 further comprises a sixth barrier wall disposed at the redundant pixel area, the thickness of the sixth barrier wall is greater than the thickness of the second barrier wall, in the first direction, the sixth barrier wall is disposed between the third barrier wall and the fourth barrier wall, the first redundant sub-area of the redundant pixel area is defined between the third barrier wall and the sixth barrier wall, and the 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 barrier wall and the fourth barrier 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 comprises a middle region and side regions located on both sides of the middle region, the fifth barrier wall is disposed at the boundary between the middle region and the side region and is configured to separate the middle region and the side region; the effective light emitting functional layer comprises a first light emitting part disposed in the middle region and a second light emitting part disposed in the side region.

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

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

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

[0026] In the first direction, the display area comprises a middle region and side regions located on both sides of the middle region, the fifth barrier wall is disposed at the boundary between the middle region and the side regions, and is configured to separate the middle region and the side regions, the side regions comprise first and second sub-regions;

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

[0028] In the first direction, the distance between the third barrier wall and the fourth barrier 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 opening in the second sub-region is greater than that in the first sub-region, and the opening area of the pixel opening in the first sub-region is greater than that in the middle region.

[0030] Optionally, in some embodiments of the present application, the opening area of the pixel opening in the second sub-region is greater than that of the 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 comprises a first light emitting part disposed in the middle region, a second light emitting part disposed in the first sub-region, and a third light emitting part disposed in the second sub-region;

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

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

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

[0035] Optionally, in some embodiments of the present application, the first barrier wall, the third barrier wall, and the fourth barrier wall are connected to define a containing groove configured to contain 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 by using an inkjet printing process.

[0036] Correspondingly, the present application also provides a display device including the display panel as described in any one of the above embodiments.

[0037] The display panel and the display device of the embodiments of the present application include a display region and a redundant pixel region, the redundant pixel region is disposed on at least one side of the display region, and the display panel includes a planar layer, an anode layer, and a pixel definition structure layer. In the display region, 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 region, 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] Based on the redundant opening directly exposing the flat layer, that is, the area of the redundant opening has no anode, so compared with the display area, the depth of the redundant opening is greater than the depth of the pixel opening, so that the redundant opening can accommodate more solvents to improve the thickness uniformity of the effective light-emitting functional layer and reduce the width of the redundant pixel area. BRIEF DESCRIPTION OF DRAWINGS

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

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

[0041] Figure 3 is Figure 2 is an enlarged schematic diagram of the M1 part in FIG. 8;

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

[0043] Figure 5 is another sectional view structural schematic diagram of a display panel provided by an embodiment of the present application;

[0044] Figure 6 is Figure 5 is an enlarged schematic diagram of the M2 part in FIG. 9;

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

[0046] Figure 8 is still another sectional view structural schematic diagram of a display panel provided by an embodiment of the present application;

[0047] Figure 9 is Figure 8 is a partial enlarged schematic diagram of the M3 part in FIG. 10;

[0048] Figure 10 is a structural schematic diagram of a display device provided by an embodiment of the present application. DETAILED DESCRIPTION

[0049] With reference to the drawings of the embodiments of the present application, the technical solutions in the embodiments of the present application will be clearly and completely described. Obviously, the described embodiments are only a part of the embodiments of the present application, rather than all the embodiments of the present application. Based on the embodiments of the present application, all the other embodiments obtained by those skilled in the art without creative efforts are within the scope of the present application. In addition, it should be understood that the specific implementations described herein are merely used to illustrate and explain the present application, and are not used to limit the present application. In the present application, the embodiments can be combined with each other, but are not described one by one, and the positional words such as "upper" and "lower" are generally used to refer to the upper and lower of the device in the actual use or working state, and the specific is the direction of the drawing surface in the drawing; and "inner" and "outer" are used in relation to the outline of the device; the words "first", "second", "third" and the like are only used as labels, and do not impose numerical requirements or establish sequences.

[0050] The present application provides 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 limited as the preferred order of the embodiments.

[0051] In Figure 1 , the first direction F1 can be a direction parallel to one side of the display panel 100 in a plan view, and for example, can be a transverse direction of the display panel 100. The second direction F2 can be a direction parallel to the other side of the display panel 100 in a plan view, and can 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 can be non-perpendicular intersection, or the first direction F1 and the second direction F2 can respectively intersect with the side of the display panel 100, that is, intersecting with the transverse 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 present application provides a display panel 100, which includes a display area AA and a redundant pixel area DA, and the redundant pixel area DA is arranged on at least one side of the display area AA. The display panel 100 includes a flat layer 11, an anode layer 12, a pixel definition structure layer 13, an effective light-emitting functional layer 141 and a redundant light-emitting functional layer 142.

[0054] The anode layer 12 is arranged on the flat layer 11. The anode layer 12 includes a plurality of anodes 12a, and the anodes 12a are arranged 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 functional layer 141 covers the pixel openings 13a, and the redundant light-emitting functional 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 planar layer 11 based on the redundant openings 13b, that is, the area of the redundant openings 13b does not have the anode, and therefore, compared with the display area AA, the depth of the redundant openings 13b is greater than the depth of the pixel openings 13a, so that the redundant openings 13b can accommodate more solvents 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 barrier wall 131, a second barrier wall 132, a third barrier wall 133, and a fourth barrier wall 134. A plurality of second barrier walls 132, third barrier walls 133, and fourth barrier walls 134 are arranged in the first direction F1, and a plurality of first barrier walls 131 are arranged in the second direction F2. The thickness of the first barrier wall 131, the third barrier wall 133, and the fourth barrier wall 134 is greater than the thickness of the second barrier wall 132.

[0059] The plurality of first barrier walls 131 and the plurality of second barrier walls 132 are disposed in the display area AA and the redundant pixel area DA. The third barrier wall 133 is disposed at the boundary between 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 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 barrier wall 132, and the second pixel definition layer p2 includes the first barrier wall 131, the third barrier wall 133 and the fourth barrier wall 134. It should be noted that the first barrier wall 131, the second barrier wall 132, the third barrier wall 133 and the fourth barrier wall 134 are not limited to forming the first pixel definition layer p1 and the second pixel definition layer p2 described above. The four can also be other same layer forms, such as the second barrier wall 132, the third barrier wall 133 and the fourth barrier wall 134 being located in the same layer, or any two of the first barrier wall 131, the second barrier wall 132, the third barrier wall 133 and the fourth barrier wall 134 being a layer, and the like.

[0062] It can be understood that the display panel 100 of the embodiment of the present application uses the third barrier 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 solute of the ink in the display area AA moving to the redundant pixel area DA due to 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 higher third barrier wall 133 and the fourth barrier wall 134, more solvent 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 film formation.

[0063] It should be understood that at least part of the film layer of the pixel definition structure layer has flatness, so that in the same thickness of the flat material, without an anode, the flat height of the flat material is not superimposed on the thickness of the anode, so that the depth of the redundant opening 13b can be deeper, and more solvent can be accommodated.

[0064] Optionally, the redundant pixel area DA surrounds the four peripheral edges of the display area AA. In the first direction F1, the third barrier wall 133 and the fourth barrier 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 barrier wall 133 and two first barrier walls 131 define a second redundant area of the redundant pixel area DA, and the two second redundant areas are arranged on the other opposite sides of the display area AA.

[0065] It can be understood that the display panel 100 further includes a driving substrate having a flat layer 11, the driving substrate including a substrate, a thin film transistor structure layer disposed on the substrate, and the flat layer 11 disposed 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 13a, and the redundant light-emitting functional layer 142 is disposed in the redundant opening 13b. The redundant light-emitting functional layer 142 has a smaller number of film layers than the effective light-emitting functional layer 141.

[0067] It can be understood that the first barrier wall 131, the third barrier wall 133, and the fourth barrier wall 134 are connected to define a containing groove 13c configured to contain solvent of ink material in a process of forming a film layer of the ink material by using the inkjet printing process. The ink material includes a solute and a solvent, and the ink material is dried to form a certain film layer in the effective light-emitting functional layer.

[0068] Based on the fact that the ink material is jet-printed in the display area AA in the process of forming the film layer of the ink material by using the inkjet printing process, the redundant pixel area DA only prints the solvent in the ink material, and the volume of the solvent per unit area in the redundant pixel area DA is greater than the volume of the solvent per unit area in the display area AA, so that the saturated vapor pressure of the redundant pixel area DA and the display area AA can be balanced in the drying process, thereby balancing the overall drying atmosphere and improving the film formation uniformity of the film layer of the ink material in the display area AA. In addition, the containing groove 13c can contain more solvent without expanding the width of the redundant pixel area DA, and the containing groove 13c can contain more solvent, so that the width of the redundant pixel area DA can be reduced.

[0069] At the same time, based on the fact that the redundant pixel area DA only prints the solvent, the redundant pixel area DA has no ink material layer. Optionally, the ink material includes at least one of a hole injection material, a hole transport material, and a light-emitting material. For example, when the light-emitting material is printed in the display area AA, the solvent of the light-emitting material is printed in the redundant pixel area DA, and after drying and film formation, the light-emitting material forms a light-emitting layer, and the solvent in the redundant pixel area DA is volatilized, and the redundant opening 13b is still 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 containing groove 13c is configured to contain solvent of 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 by using the 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 the electron transport layer 14d and the 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 the corresponding solvent can be printed in the redundant pixel area DA during the preparation of all the film layers.

[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 a plurality of pixel openings 13a. In the second direction F2, the first barrier 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, the two adjacent first barrier walls 131 define a row of sub-pixels. Since the second barrier wall 132 is relatively low, the adjacent pixel openings 13a separated by the second barrier wall 132 can be connected, so that when performing inkjet printing in the display area AA, an ink layer can be printed at one time, thereby reducing the printing difficulty and improving the printing efficiency.

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

[0076] It can be understood that, in the process of the pixel definition structure layer 13, the second barrier wall 132 is first formed on the planar layer 11. The material of the second barrier wall 132 is an organic material, such as transparent photoresist, polyimide, etc. Subsequently, the first barrier wall 131, the third barrier wall 133, and the fourth barrier wall 134 are formed at one time by using the same mask on the second barrier wall 132, so as to save the process steps.

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

[0078] Optionally, in some embodiments, the first barrier wall 131, the third barrier wall 133 and the fourth barrier wall 134 in the redundant pixel area DA can also be formed by using a half-tone mask plate, wherein the thickness of the first barrier wall 131, the third barrier wall 133 and the fourth barrier wall 134 in the redundant pixel area DA is greater than the thickness of the first barrier wall 131 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, the distance between the third barrier wall 133 and the fourth barrier wall 134 in the first direction F1 is less than or equal to 1 mm.

[0080] It can be understood that the accommodation groove 13c formed by the redundant pixel area DA surrounded by the first barrier wall 131, the third barrier wall 133 and the fourth barrier wall 134 has a larger volume and can accommodate more solvent. In fact, in order to prevent the solvent from overflowing the redundant pixel area DA and without expanding the display area AA, due to the greater thickness of the first barrier wall 131, the third barrier wall 133 and the fourth barrier wall 134, the depth of the accommodation groove 13c is greater, and based on the consideration of the drying atmosphere balance of the redundant pixel area DA and the display area AA, the solvent can be lower in height, and the width of the redundant pixel area DA can be larger. Therefore, based on the requirement of not expanding the display area AA and slightly reducing the width of the redundant pixel area DA, the distance between the third barrier wall 133 and the fourth barrier wall 134 in the first direction F1 can be less than or equal to 1 mm, such as 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 preparation method of the display panel 100 of some embodiments of the present application includes the following steps:

[0082] Step B01, providing a printing substrate, wherein the printing substrate includes a flat 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, and the larger the area of the redundant pixel area DA, the shallower the depth of the solvent. The first solvent is printed first, which plays a protective effect on the printing atmosphere.

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

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

[0086] Step B05, continuing to dry the solvent to remove the solvent. It can be understood that, since the solvent amount of the redundant pixel area DA is larger, the solvent of the display area AA will be evaporated first, and the solvent of the redundant pixel area DA will be left, so it is necessary to continue to dry to remove the solvent.

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

[0088] For example, first, the solvent of the hole injection layer 14a is printed in the redundant pixel area DA, then the ink of the hole injection layer 14a is printed in the display area AA, 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. In this way, a cycle step of preparing a film layer is completed. 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, then the ink of the hole transport layer 14b is printed in the display area AA, 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, then the ink of the light-emitting layer 14c is printed in the display area AA, 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, sequentially forming an electron transport layer 14d, an electron injection layer 14f and a cathode 15 on the light-emitting layer 14c.

[0090] Optionally, the electron transport layer 14d, the electron injection layer 14f and the cathode 15 can be formed by an evaporation process or a sputtering process.

[0091] The electron transport layer 14d, the electron injection layer 14f and the cathode 15 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 the effective light-emitting functional layer 141. The electron transport layer 14d and the electron injection layer 14f of the redundant pixel area DA form the redundant light-emitting functional layer 142.

[0092] Figure 4 Fig. 4 shows another top view structural schematic diagram of the display panel 100 according to an embodiment of the present application, Figure 5 Fig. 5 shows a top view structural schematic diagram of a display panel 100 based on Figure 4A cross-sectional structural schematic diagram of the display panel 100.

[0093] In Figure 4 and Figure 5 , parts different from some of the above embodiments 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 comprises a fifth barrier wall 135 arranged at 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 arranged on the 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 can be understood that the redundant pixel area DA can accommodate more solvent, so the width of the redundant pixel area DA can be further reduced by printing deeper solvent, and the display area AA can be enlarged. Secondly, the fifth barrier wall 135 is used to separate the two side regions and the middle region of the display area AA, which further reduces the risk of solvent flowing from the middle region of the display area AA to the two side regions, and improves the film uniformity of the ink material layer in the display area AA.

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

[0097] Optionally, in some embodiments of the present application, the pixel definition structure layer 13 further comprises a sixth barrier wall 136 arranged 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, in the first direction F1, the sixth barrier wall 136 is arranged between the third barrier wall 133 and the fourth barrier wall 134, the third barrier wall 133 and the sixth barrier wall 136 define a first redundant sub-area DA1 of the redundant pixel area DA, and the sixth barrier wall 136 and the fourth barrier wall 134 define a second sub-area DA2 of the redundant pixel area DA.

[0098] It can be understood that the gas pressure saturation degree of the area away from the edge is lower, 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 degree, to better maintain the uniformity of the dry atmosphere, and to further improve the film uniformity.

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

[0100] It can be understood 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 by using the same mask, so as to save the process steps.

[0101] Optionally, 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 made of the same material and have the same thickness.

[0102] Optionally, in some embodiments, 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 can also be formed by using a multi-tone mask plate, 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 region AA1 and side regions AA2 located on both sides of the middle region AA1. The fifth barrier wall 135 is arranged at the boundary between the middle region AA1 and the side region AA2, and is configured to separate the middle region AA1 and the side region AA2. The effective light-emitting functional layer 141 includes a first light-emitting part 411 arranged in the middle region AA1 and a second light-emitting part 412 arranged in the side region AA2.

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

[0105] The thickness of the first effective light-emitting sub-section 41a is equal to the thickness of the second effective light-emitting sub-section 41c. The thickness of the second edge sub-section 41d is greater than the thickness of the first edge sub-section 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, the coffee ring effect is also affected, that is, due to the faster evaporation speed of the peripheral edge area, the solute in the middle area is accumulated to the peripheral edge area with the solvent, forming a film layer phenomenon of low middle and high periphery, and the middle area of the film layer is the effective area for light emission, so the thickness uniformity of the middle area of the film layer is a decisive factor of the overall light emission uniformity of the display panel 100.

[0107] Based on this, because the drying speed of the area farther out is relatively fast, the solute flows and accumulates more to the periphery, and the display area AA expands, further increasing the difference in film thickness between the side area AA2 and the middle area AA1, so 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, so that the thickness of the first effective light-emitting sub-section 41a is equal to the thickness of the second effective light-emitting sub-section 41c, thereby improving the film layer uniformity of the display panel 100.

[0108] Figure 7 Fig. 7 shows another top view structural schematic diagram of the display panel 100 of the embodiment of the present application, Figure 8 Fig. 8 shows a cross-sectional structural schematic diagram of the display panel 100 based on Figure 7 .

[0109] In Figure 7 and Figure 8 , the parts different from the above-mentioned embodiments 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 comprises 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 a side area located on both sides of the middle area AA1, the fifth barrier 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] The third barrier wall 133 and the seventh barrier wall 137 define a second sub-area a22, and the seventh barrier wall 137 and the fifth barrier wall 135 define a first sub-area a21.

[0113] It can be understood that the redundant pixel area DA can accommodate more solvent, so the redundant pixel area DA width can be further reduced and the display area AA can be enlarged by printing deeper solvent, such as full solvent printing. In addition, the seventh barrier wall 137 is used to separate the two side areas AA2 of the display area AA, which further reduces the risk of solvent flowing to the side edge of the side area AA2 of the display area AA, and improves the film uniformity of the ink material layer in the display area AA.

[0114] Optionally, in the first direction F1, the distance between the third barrier wall 133 and the fourth barrier 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, such as 0.3 mm, 0.2 mm or 0.1 mm.

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

[0116] It can be understood 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 at one time by using the same mask on the second barrier wall 132, so as to save the process steps.

[0117] Optionally, the materials and thicknesses of 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 the same.

[0118] Optionally, in some embodiments, 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 can also be formed by using a half-tone mask, wherein the thicknesses of the first barrier wall 131, the third barrier wall 133 and the fourth barrier wall 134 located in the redundant pixel area DA are greater than the thickness of the first barrier wall 131 located in the display area AA, so as to improve 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 opening 13a in the second sub-area a22 is greater than the opening area of the pixel opening 13a in the first sub-area a21, and the opening area of the pixel opening 13a in the first sub-area a21 is greater than the opening area of the pixel opening 13a in the middle area AA1.

[0120] It can be understood that by improving the opening area of the pixel opening 13a, the volume is increased, more ink is contained, and the uniformity of the film layer is improved.

[0121] Optionally, in some embodiments, the width of the pixel opening 13a in the middle region AA1 is smaller than the width of the pixel opening 13a in the first sub-region a21, and the width of the pixel opening 13a in the first sub-region a21 is smaller than the width of the pixel opening 13a in the second sub-region a22.

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

[0123] It can be understood that based on the fact that the redundant pixel region DA only prints solvent, the redundant opening 13b contains more solvent under the same opening volume, and by increasing the opening area of the pixel opening 13a in the second sub-region a22, the amount of solvent contained by the edge region of the display region 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 in the middle region AA1 is smaller than the volume of the pixel opening 13a in the first sub-region a21, and the volume of the pixel opening 13a in the first sub-region a21 is smaller than the volume of the pixel opening 13a in the second sub-region a22.

[0125] It can be understood that in the display region AA, the volume of the pixel opening 13a increases in the direction from the middle region AA1 to the edge, and the ink that can be contained increases in a increasing trend, thereby the saturation of the vapor around the display region AA can be improved to balance the overall drying atmosphere and improve the uniformity of the film layer.

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

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

[0128] Optionally, please refer to Figure 9In some embodiments of the present application, the effective light-emitting functional layer 141 includes a first light-emitting part 411 disposed in the middle region AA1, a second light-emitting part 412 disposed in the first sub-region a21, and a third light-emitting part 413 disposed in the second sub-region a22.

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

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

[0131] Because the drying speed of the outer regions is relatively fast, the solute flows and accumulates more in the surrounding, and the display region AA expands, further increasing the difference in film thickness between the side region AA2 and the middle region AA1. Therefore, the display panel 100 of the present application prints the most ink in the second sub-region a22, the second most ink in the first sub-region a21, and the least ink in the middle region AA1, so that, after drying, the thickness of the first effective light-emitting sub-part 41a, the thickness of the second effective light-emitting sub-part 41c, and the thickness of the third effective light-emitting sub-part 41e are equal, thereby improving the film layer uniformity of the display panel 100.

[0132] Please refer to Figure 10 The present application also provides a display device 1000 including the display panel 100 of any one of the above embodiments.

[0133] It should be noted that the structure of the display panel 100 of the display device 1000 in the embodiment of the present application is similar or identical to that of the display panel 100 in the above-mentioned embodiments, and specific details can be referred to the corresponding descriptions of the above-mentioned embodiments. Figures 1 to 8

[0134] The display device 1000 in the embodiment of the present application includes a display area AA and a redundant pixel area DA, the redundant pixel area DA is arranged 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 thicknesses of the third barrier wall 133 and the fourth barrier wall 134 are 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 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 cross and connect 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 cross and connect 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 barrier wall 133 separates 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 solute of the ink in the display area AA moving to the redundant pixel area DA due to 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 higher third barrier wall 133 and the fourth barrier wall 134, more solvent 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, based on the fact that the redundant openings 13b directly expose the planar layer 11, that is, the area of the redundant openings 13b does not have an anode, the depth of the redundant openings 13b is greater than the depth of the pixel openings 13a compared to the display area AA, so that the redundant openings 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 describes in detail the display panel and the display device provided by the embodiments of the present application. The principles and implementation manners of the present application are described by using specific examples. The above description of the embodiments is only used to help understand the method of the present application and its core idea. Meanwhile, for those skilled in the art, the specific implementation manners and application ranges can be changed according to the idea of the present application. In conclusion, the content of the specification should not be understood as a limitation of the present application.

Claims

1. A display panel comprising a display area and a redundant pixel area, the redundant pixel area being provided at least at one side of the display area, characterized in that, The display panel comprises: a flat layer; an anode layer disposed on the flat layer, the anode layer comprising a plurality of anodes disposed in the display area; a pixel definition structure layer disposed on a side of the anode layer away from the flat layer, the pixel definition structure layer comprising a first pixel definition layer and a second pixel definition layer disposed on the first pixel definition layer, the first pixel definition layer and the second pixel definition layer being disposed in cross connection; 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, the pixel openings exposing the anodes; 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, the redundant openings exposing the flat layer, the depth of the redundant openings being greater than the depth of the pixel openings.

2. The display panel of claim 1, wherein, The display panel comprises an effective light-emitting functional layer and a redundant light-emitting functional layer, the effective light-emitting functional layer being disposed in the pixel openings, and the redundant light-emitting functional layer being disposed in the redundant openings. 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 of claim 2, wherein, The effective light-emitting functional layer comprises 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 comprises the electron transport layer and the electron injection layer, and the redundant light-emitting functional layer does not comprise at least one of the hole injection layer, the hole transport layer, and the light-emitting layer.

4. The display panel of claim 1, wherein, The first pixel definition layer comprises second spacers, the second pixel definition layer comprises first spacers, third spacers, and fourth spacers, a plurality of the second spacers, the third spacers, and the fourth spacers are arranged in a first direction, a plurality of the first spacers are arranged in a second direction, the thickness of the first spacers, the third spacers, and the fourth spacers is greater than the thickness of the second spacers; a plurality of the first spacers and a plurality of the second spacers are disposed in the display area and the redundant pixel area; the third spacers are disposed at the boundary between the display area and the redundant pixel area, and are configured to separate the display area and the redundant pixel area, in the first direction, the fourth spacers are away from the display area and located at the outer edge of the redundant pixel area; in the display area, the first spacers and the second spacers are cross-connected to form a plurality of pixel openings, the pixel openings exposing the anodes; in the redundant pixel area, the first spacers and the second spacers are cross-connected to form a plurality of redundant openings.

5. The display panel of claim 4, wherein, The third spacers and the fourth spacers are integrally connected with the first spacers, respectively.

6. The display panel of claim 4, wherein, In the first direction, the distance between the third spacers and the fourth spacers is less than or equal to 1 millimeter.

7. The display panel of claim 4, wherein, The pixel definition structure layer further comprises fifth spacers disposed in the edge region of the display area, the thickness of the fifth spacers is greater than the thickness of the second spacers, in the first direction, the fifth spacers are disposed on a side of the third spacers away from the fourth spacers, and the area between the third spacers and the fifth spacers has a plurality of the pixel openings.

8. The display panel of claim 7, wherein, The pixel definition structure layer further comprises a sixth barrier wall disposed in the redundant pixel region, a thickness of the sixth barrier wall is greater than a thickness of the second barrier wall, in the first direction, the sixth barrier wall is disposed between the third barrier wall and the fourth barrier wall, a first redundant sub-region of the redundant pixel region is defined between the third barrier wall and the sixth barrier wall, and a second redundant sub-region of the redundant pixel region is defined between the sixth barrier wall and the fourth barrier wall.

9. The display panel of claim 8, wherein, In the first direction, a distance between the third barrier wall and the fourth barrier wall is less than or equal to 0.5 mm.

10. The display panel of claim 8, wherein, In the first direction, the display region comprises a middle region and side regions located on both sides of the middle region, the fifth barrier wall is disposed at a boundary between the middle region and the side regions, and is configured to separate the middle region and the side regions; the effective light-emitting functional layer comprises a first light-emitting part disposed in the middle region and a second light-emitting part disposed in the side region. A plurality of the pixel openings comprise first openings disposed in the middle region and second openings disposed in the side region, a first light-emitting part is disposed in the first opening, and the second light-emitting part is disposed in the second opening; the first light-emitting part comprises a first effective light-emitting sub-part and a first edge sub-part surrounding the first effective light-emitting sub-part, a thickness of the first edge sub-part is greater than a thickness of the first effective light-emitting sub-part, the second light-emitting part comprises a second effective light-emitting sub-part and a second edge sub-part surrounding the second effective light-emitting sub-part, and a thickness of the second edge sub-part is greater than a thickness of the second effective light-emitting sub-part. The thickness of the first effective light-emitting sub-part is equal to the thickness of the second effective light-emitting sub-part, and the thickness of the second edge sub-part is greater than the thickness of the first edge sub-part.

11. The display panel of claim 7, wherein, The pixel definition structure layer further comprises a seventh barrier wall disposed in the display region, a thickness of the seventh barrier wall is greater than a 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 region comprises a middle region and side regions located on both sides of the middle region, the fifth barrier wall is disposed at a boundary between the middle region and the side regions, and is configured to separate the middle region and the side regions, and the side regions comprise a first sub-region and a second sub-region. The third barrier wall and the seventh barrier wall define the first sub-region, and the seventh barrier wall and the fifth barrier wall define the second sub-region.

12. The display panel of claim 11, wherein, All the pixel openings in the display region have equal depths, an opening area of a pixel opening in the second sub-region is greater than an opening area of a pixel opening in the first sub-region, and an opening area of a pixel opening in the first sub-region is greater than an opening area of a pixel opening in the middle region.

13. The display panel of claim 12, wherein, An opening area of a pixel opening in the second sub-region is greater than an opening area of a redundant opening adjacent to the second sub-region in the redundant pixel region.

14. The display panel of claim 11, wherein, In the first direction, a distance between the third barrier wall and the fourth barrier wall is less than or equal to 0.3 mm.

15. The display panel of claim 11, wherein, The effective light-emitting functional layer comprises a first light-emitting part arranged in the middle region, a second light-emitting part arranged in the first sub-region, and a third light-emitting part arranged in the second sub-region. The plurality of pixel openings comprise a first opening arranged in the middle region, a second opening arranged in the first sub-region, and a third opening arranged in the second sub-region, the first light-emitting part is arranged in the first opening, the second light-emitting part is arranged in the second opening, and the third light-emitting part is arranged in the third opening; the first light-emitting part comprises a first effective light-emitting sub-part and a first edge sub-part surrounding the first effective light-emitting sub-part, the thickness of the first edge sub-part is greater than the thickness of the first effective light-emitting sub-part, the second light-emitting part comprises a second effective light-emitting sub-part and a second edge sub-part surrounding the second effective light-emitting sub-part, the thickness of the second edge sub-part is greater than the thickness of the second effective light-emitting sub-part; the third light-emitting part comprises a third effective light-emitting sub-part and a third edge sub-part surrounding the third effective light-emitting sub-part, the thickness of the third edge sub-part is greater than the thickness of the third effective light-emitting sub-part; The thickness of the first effective light-emitting sub-part, the thickness of the second effective light-emitting sub-part, and the thickness of the third effective light-emitting sub-part are equal, the thickness of the second edge sub-part is greater than the thickness of the first edge sub-part, and the thickness of the third edge sub-part is greater than the thickness of the second edge sub-part.

16. The display panel of claim 4, wherein, The first barrier wall, the third barrier wall, and the fourth barrier wall are connected to define a containing groove configured to contain 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 by A display panel comprising any one of claims 1-16.

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