Display panel and manufacturing method thereof

Abstract

The application discloses a display panel and a manufacturing method thereof. The display panel comprises a plurality of pixel unit regions arranged in an array along a first direction and a second direction, and the first direction is different from the second direction; the display panel further comprises a substrate, a pixel definition layer and an organic light-emitting layer; the pixel definition layer is arranged on the substrate and comprises a first barrier wall, and the first barrier wall is arranged around each pixel unit region; the organic light-emitting layer is arranged on the pixel definition layer and comprises a plurality of light-emitting pixels; at least two light-emitting pixels arranged along the second direction are arranged in each pixel unit region; a distance from an end of the first barrier wall away from the substrate to the substrate is greater than a distance from an end of each light-emitting pixel away from the substrate to the substrate; and the light-emitting colors of the light-emitting pixels in the same pixel unit region are the same. The application can improve the film uniformity and yield of the light-emitting pixels.

Description

Technical Field

[0001] This invention relates to the field of display technology, and in particular to a display panel and its manufacturing method. Background Technology

[0002] In recent years, organic light-emitting diode (OLED) displays have become a very popular emerging flat panel display product both domestically and internationally. This is because OLED displays have the characteristics of self-illumination, wide viewing angle, short response time, high luminous efficiency, wide color gamut, low operating voltage, thinness, ability to manufacture large-size and flexible displays, and simple manufacturing process. Moreover, it also has the potential for low cost.

[0003] Currently, in the manufacturing process of OLED displays, pixels are often fabricated using inkjet printing technology, such as line bank printing and side-by-side printing. For details on line bank printing, please refer to... Figure 1 It includes multiple sub-pixel areas 1, multiple vertically arranged baffles 2, and multiple horizontally arranged baffles 3, with the height of baffles 3 greater than the height of baffles 1. Therefore, during printing, the ink can be separated by the vertical baffles 2 and flow longitudinally through the multiple sub-pixel areas 1 and baffles 3, improving film uniformity. However, when inkjet fluctuations cause color mixing, all multiple vertical sub-pixel areas 1 will experience color mixing. For Side-by-Side printing processes, please refer to... Figure 2 It includes multiple sub-pixel areas 4 and a barrier 5 surrounding each sub-pixel area 4, which can confine the ink within each sub-pixel area 4 for film formation. Thus, when color mixing occurs, it generally only affects a single sub-pixel area 4. However, due to the small area of ​​the sub-pixel area 4, the inkjet printing precision requirements are high, and the ink flow area within the sub-pixel area 4 is small, which can easily lead to uneven film formation.

[0004] Therefore, existing technologies cannot improve the yield rate of inkjet printing while ensuring improved film uniformity. Summary of the Invention

[0005] This invention provides a display panel and its manufacturing method, which can improve the uniformity of film formation of light-emitting pixels and the yield rate.

[0006] This invention provides a display panel, which includes a plurality of pixel unit areas arranged in an array along a first direction and a second direction, wherein the first direction and the second direction are different.

[0007] The display panel also includes:

[0008] substrate;

[0009] A pixel definition layer is disposed on the substrate and includes a first barrier wall, the first barrier wall being disposed around each pixel unit area;

[0010] An organic light-emitting layer is disposed on the pixel definition layer and includes a plurality of light-emitting pixels. Each pixel unit area is provided with at least two light-emitting pixels arranged along the second direction. The distance from the end of the first barrier away from the substrate to the substrate is greater than the distance from the end of each light-emitting pixel away from the substrate to the substrate. The light-emitting pixels in the same pixel unit area have the same light-emitting color.

[0011] In one embodiment of the present invention, the display panel further includes a plurality of pixel unit groups arranged along the second direction, each pixel unit group having a plurality of pixel unit areas arranged along the first direction, and the number of light-emitting pixels in each pixel unit area within the same pixel unit group being the same.

[0012] In one embodiment of the present invention, the pixel definition layer further includes a plurality of second baffles extending along the first direction and arranged along the second direction. In each pixel unit group, a second baffle is provided between two adjacent light-emitting pixels in each pixel unit group, and the height of the second baffle is less than the thickness of each light-emitting pixel.

[0013] In one embodiment of the present invention, the first retaining wall includes a plurality of first sub-parts extending along the second direction and arranged along the first direction, and at least one second sub-part extending along the first direction and arranged along the second direction. The first sub-part is disposed between any two adjacent pixel unit regions arranged along the first direction, and the second sub-part is disposed between any two adjacent pixel unit region groups arranged along the second direction.

[0014] The second barrier is further disposed between any two adjacent pixel unit groups arranged along the second direction, and between any two adjacent pixel unit groups arranged along the second direction, a second sub-part and a second barrier are stacked, with the second sub-part located on the side of the second barrier away from the substrate.

[0015] In one embodiment of the present invention, the sum of the heights of the stacked second sub-part and the second retaining wall is equal to the height of the portion of the first sub-part located between two adjacent pixel unit areas.

[0016] In one embodiment of the present invention, the materials of the first retaining wall and the second retaining wall are different, wherein the first retaining wall is hydrophobic and the second retaining wall is hydrophilic.

[0017] In one embodiment of the present invention, the material of the first retaining wall is the same as that of the second retaining wall, wherein both the first retaining wall and the second retaining wall are hydrophilic.

[0018] In one embodiment of the present invention, between two adjacent pixel unit regions along the second direction, the number of light-emitting pixels in one pixel unit region is the same as or different from the number of light-emitting pixels in the other pixel unit region.

[0019] In one embodiment of the present invention, the number of light-emitting pixels in each pixel unit area is less than or equal to 6.

[0020] According to the above-mentioned objectives of the present invention, embodiments of the present invention also provide a method for manufacturing a display panel, the display panel comprising a plurality of pixel unit regions arranged in an array along a first direction and a second direction, wherein the first direction and the second direction are different;

[0021] The method for manufacturing the display panel includes the following steps:

[0022] Provide substrate;

[0023] A pixel definition layer is formed on the substrate, the pixel definition layer including a first barrier wall, the first barrier wall being disposed around each pixel unit region;

[0024] An organic light-emitting layer is formed on the pixel definition layer. The organic light-emitting layer includes a plurality of light-emitting pixels. At least two light-emitting pixels arranged along the second direction are formed in each pixel unit area. The distance from the end of the first barrier away from the substrate to the substrate is greater than the distance from the end of each light-emitting pixel away from the substrate to the substrate. The light-emitting pixels in the same pixel unit area have the same light-emitting color.

[0025] The beneficial effects of the present invention are as follows: The present invention sets up multiple pixel unit regions arranged in an array along a first direction and a second direction. Each pixel unit region includes at least two light-emitting pixels arranged along the second direction. Each pixel unit region is surrounded by a first barrier wall, and the distance from the end of the first barrier wall away from the substrate to the substrate is greater than the distance from the end of the light-emitting pixel away from the substrate to the substrate. Therefore, during inkjet printing along the second direction, the ink can flow within the pixel unit region, increasing the ink flow area and improving the film uniformity of each light-emitting pixel. In addition, the ink flow in the second direction is blocked by the first barrier wall and confined within each pixel unit region. When color mixing occurs, it will not cause color mixing of the entire line of light-emitting pixels arranged along the second direction, thereby improving the film yield of the light-emitting pixels. Attached Figure Description

[0026] The technical solution and other beneficial effects of the present invention will become apparent from the following detailed description of specific embodiments of the invention, in conjunction with the accompanying drawings.

[0027] Figure 1 This is a schematic diagram of the planar distribution structure of an existing line bank type display panel;

[0028] Figure 2 This is a schematic diagram of the planar distribution structure of an existing side-by-side display panel.

[0029] Figure 3 This is a schematic diagram of a planar distribution structure of a display panel provided in an embodiment of the present invention;

[0030] Figure 4 This is a schematic diagram of another planar distribution structure of the display panel provided in an embodiment of the present invention;

[0031] Figure 5 A flowchart illustrating the manufacturing method of a display panel provided in an embodiment of the present invention;

[0032] Figure 6 and Figure 7 This is a schematic diagram illustrating the manufacturing process of a display panel provided in an embodiment of the present invention;

[0033] Figure 8 and Figure 9 This is a schematic diagram illustrating another manufacturing process of the display panel provided in an embodiment of the present invention. Detailed Implementation

[0034] The technical solutions of the embodiments of the present invention will be clearly and completely described below with reference to the accompanying drawings. Obviously, the described embodiments are only a part of the embodiments of the present invention, and not all of them. All other embodiments obtained by those skilled in the art based on the embodiments of the present invention without creative effort are within the scope of protection of the present invention.

[0035] The following disclosure provides many different embodiments or examples for implementing various structures of the invention. To simplify the disclosure, specific examples of components and arrangements are described below. These are merely examples and are not intended to limit the invention. Furthermore, reference numerals and / or letters may be repeated in different examples; such repetition is for simplification and clarity and does not in itself indicate a relationship between the various embodiments and / or arrangements discussed. In addition, examples of various specific processes and materials are provided in this invention, but those skilled in the art will recognize the application of other processes and / or the use of other materials.

[0036] This invention provides a display panel, please refer to... Figure 3 The display panel includes a plurality of pixel unit areas 101 arranged in an array along a first direction X and a second direction Y, wherein the first direction X and the second direction Y are different.

[0037] The display panel also includes a substrate, a pixel definition layer 10, and an organic light-emitting layer; wherein, the pixel definition layer 10 includes a first barrier 11, which surrounds each pixel unit area 101; the organic light-emitting layer is disposed on the pixel definition layer 10 and includes a plurality of light-emitting pixels 20, and each pixel unit area 101 has at least two light-emitting pixels 20 arranged along the second direction Y, and the distance from the end of the first barrier 11 away from the substrate to the substrate is greater than the distance from the end of each light-emitting pixel 20 away from the substrate to the substrate, and the light-emitting color of each light-emitting pixel 20 in the same pixel unit area 101 is the same.

[0038] In the implementation process, the embodiments of the present invention set up a plurality of pixel unit regions 101 arranged in an array along the first direction X and the second direction Y. Each pixel unit region 101 includes at least two light-emitting pixels 20 arranged along the second direction Y. Each pixel unit region 101 is surrounded by a first barrier 11, and the distance from the end of the first barrier 11 away from the substrate to the substrate is greater than the distance from the end of the light-emitting pixel 20 away from the substrate to the substrate. In the process of inkjet printing along the second direction Y, the ink can flow within the pixel unit region 101, increasing the area of ​​ink flow and improving the film uniformity of each light-emitting pixel 20. In addition, the flow of ink in the second direction Y will be blocked by the first barrier 11 and confined within each pixel unit region 101. When color mixing occurs, the entire line of light-emitting pixels 20 arranged along the second direction Y will not be mixed, thereby improving the film yield of the light-emitting pixels 20.

[0039] Specifically, in one embodiment of the present invention, please refer to Figure 3 The display panel provided in this embodiment of the invention includes a substrate, a pixel definition layer 10 disposed on the substrate, and an organic light-emitting layer disposed on the pixel definition layer 10.

[0040] Furthermore, the display panel also includes a plurality of pixel unit areas 101 arranged in an array along the first direction X and the second direction Y, and the first direction X may be perpendicular to the second direction Y.

[0041] The pixel definition layer 10 includes a first barrier 11 disposed around the pixel unit area 101. It should be noted that, in the embodiments of the present invention, the first barrier 11 is disposed around each pixel unit area 101. Specifically, the first barrier 11 includes a plurality of first sub-parts 111 extending along the second direction Y and arranged along the first direction X, and at least one second sub-part 112 extending along the first direction X and arranged along the second direction Y.

[0042] The display panel further includes multiple pixel unit groups 102 arranged along the second direction Y, and each pixel unit group 102 includes multiple pixel unit areas 101 arranged along the first direction X. That is, each row of pixel unit areas 101 arranged along the first direction X is set as a pixel unit group 102. A first sub-part 111 is provided between any two adjacent pixel unit areas 101 arranged along the first direction X, and a second sub-part 112 is provided between any two adjacent pixel unit groups 102 arranged along the second direction.

[0043] The organic light-emitting layer includes a plurality of light-emitting pixels 20, and each pixel unit region 101 is provided with at least two light-emitting pixels 20 arranged along the second direction Y. The light-emitting pixels 20 in the same pixel unit region 101 have the same light emission color, and the light emission colors of any two adjacent pixel unit regions 101 arranged along the second direction Y are all the same. However, between any two adjacent pixel unit regions 101 arranged along the first direction X, the light emission color of the light-emitting pixel 20 in one pixel unit region 101 is different from the light emission color of the light-emitting pixel 20 in the other pixel unit region 101.

[0044] Optionally, the plurality of light-emitting pixels 20 includes a first light-emitting pixel 21, a second light-emitting pixel 22, and a third light-emitting pixel 23. In this embodiment of the invention, the plurality of first light-emitting pixels 21 are arranged in an array along a first direction X and a second direction Y, the plurality of second light-emitting pixels 22 are arranged in an array along the first direction X and the second direction Y, and the plurality of third light-emitting pixels 23 are arranged in an array along the first direction X and the second direction Y. The arrangement of the plurality of light-emitting pixels 20 can be such that a column of first light-emitting pixels 21, a column of second light-emitting pixels 22, and a column of third light-emitting pixels 23 constitute a pixel group, and the plurality of pixel groups are arranged along the first direction X. Further, the first light-emitting pixel 21 can be a red light-emitting pixel, the second light-emitting pixel 22 can be a green light-emitting pixel, and the third light-emitting pixel 23 can be a blue light-emitting pixel.

[0045] It should be noted that, in this embodiment of the invention, within the same pixel unit area group 102, the number of light-emitting pixels 20 in each pixel unit area 101 is the same, that is, the number of light-emitting pixels 20 in each pixel unit area 101 in the same row is the same. However, between two adjacent pixel unit areas 101 arranged along the second direction Y, the number of light-emitting pixels 20 in one pixel unit area 101 may be the same as or different from the number of light-emitting pixels 20 in the other pixel unit area 101. This embodiment of the invention uses the example of one pixel unit area 101 having the same number of light-emitting pixels 20 as another pixel unit area 101 for illustration.

[0046] Optionally, the number of light-emitting pixels 20 in each pixel unit area 101 can be greater than or equal to 2 and less than or equal to 6. In this embodiment, the example is that the number of light-emitting pixels 20 in each pixel unit area 101 is 3.

[0047] Wherein, the distance from the end of the first barrier 11 away from the substrate to the substrate is greater than the distance from the end of each light-emitting pixel 20 away from the substrate to the substrate, thereby the first barrier 11 can make each pixel unit area 101 be arranged at intervals.

[0048] Furthermore, the pixel definition layer 10 also includes a plurality of second baffles 12 extending along the first direction X and arranged along the second direction Y. In each pixel unit group 102, a second baffle 12 is provided between two adjacent light-emitting pixels 20 in each pixel unit group 101. That is, each second baffle 12 is provided between two adjacent rows of light-emitting pixels 20 in the same pixel unit group 102, and the height of the second baffle 12 is less than the thickness of each light-emitting pixel 20.

[0049] In this embodiment of the invention, a second barrier wall 12 is provided between any two adjacent rows of light-emitting pixels 20 along the second direction Y. Furthermore, a second barrier wall 12 and a second sub-part 112 are provided between two adjacent pixel unit areas 101 along the second direction Y. The second sub-part 112 is stacked with the second barrier wall 12, and the second sub-part 112 is located on the side of the second barrier wall 12 away from the substrate.

[0050] It is understandable that, since the height of the second barrier 12 is less than the thickness of each light-emitting pixel 20, in each pixel unit area 101, between any two adjacent light-emitting pixels 20, one light-emitting pixel 20 extends onto the second barrier 12 and is connected to the other light-emitting pixel 20.

[0051] Continuing from the above, in this embodiment of the invention, the first barrier 11 is set to space the light-emitting pixels 20 arranged along the second direction Y. As a result, in the inkjet printing process of the light-emitting pixels 20, the ink flows within each pixel unit area 101. Compared with the existing side-by-side printing process where the ink only flows within a single sub-pixel area, the ink flow area in this embodiment of the invention is increased, which can improve the film uniformity of each light-emitting pixel 20 and reduce the requirements for printing accuracy. In addition, in this embodiment of the invention, the ink is blocked by the second sub-section 112 during the flow along the second direction Y. Therefore, when ink jet fluctuations cause color mixing, it only affects the three light-emitting pixels 20 belonging to the same pixel unit area 101. Compared with the existing line bank printing process, which directly affects an entire sub-pixel area in the vertical direction, this embodiment of the invention can improve the yield of the light-emitting pixels 20.

[0052] Furthermore, in this embodiment of the invention, the first barrier 11 is hydrophobic, which can better prevent ink overflow, and the material of the first barrier 11 may include an acrylic material containing hydrophobic groups, which may be fluoride ions; while the second barrier 12 is hydrophilic, which can better allow ink to flow within the same pixel unit area 101 and improve film uniformity, and the material of the second barrier 12 may be an acrylic material containing hydrophilic groups, and is different from the material of the first barrier 11.

[0053] Optionally, the height of the first barrier 11 is greater than or equal to 1 micrometer and less than or equal to 1.5 micrometers, while the height of the second barrier 12 is greater than or equal to 0.3 micrometers and less than or equal to 0.5 micrometers. Furthermore, in the pixel definition layer 10, there are barrier overlapping positions, such as the position where the first sub-part 111 overlaps with the second barrier 12 and the position where the second sub-part 112 overlaps with the second barrier 12. The height of the barrier overlapping positions is the same as the height of other positions where only the first barrier 11 is provided, that is, the end of the first barrier 11 away from the substrate is flush with the first barrier 11 at any position.

[0054] In another embodiment of the present invention, please continue to refer to Figure 3 The difference between this embodiment and the previous embodiment is that a second sub-part 112 or a second barrier 12 is provided between any two adjacent light-emitting pixels 20 arranged along the second direction Y. That is, only the second sub-part 112 is provided between any two adjacent pixel unit areas 101 arranged along the second direction Y, and the second barrier 12 is not provided, so that the orthographic projection of the second sub-part 112 on the substrate does not overlap with the orthographic projection of the second barrier 12 on the substrate.

[0055] In another embodiment of the present invention, please continue to refer to Figure 3 The difference between this embodiment and the first embodiment is that the materials of the first retaining wall 11 and the second retaining wall 12 are the same, that is, the first retaining wall 11 and the second retaining wall 12 are integrally formed.

[0056] Preferably, both the first barrier 11 and the second barrier 12 are hydrophilic to improve the flow of ink on the second barrier 12 during inkjet printing.

[0057] In other embodiments of the present invention, the first barrier 11 and the second barrier 12 may also be hydrophobic to improve the blocking effect of the first barrier 11 on ink.

[0058] In another embodiment of the present invention, please refer to Figure 4 The difference between this embodiment and the first embodiment is that the number of light-emitting pixels 20 in each pixel unit area 101 is 5.

[0059] In summary, because the second sub-part 112 in this embodiment of the invention spaces the pixel unit areas 101 arranged along the second direction Y, the ink flows within each pixel unit area 101 during the inkjet printing process of the light-emitting pixel 20. Compared to the existing side-by-side printing process where the ink only flows within a single sub-pixel area, the ink flow area in this embodiment of the invention is increased, which can improve the film uniformity of each light-emitting pixel 20 and reduce the requirements for printing accuracy. Furthermore, in this embodiment of the invention, the ink is blocked by the second sub-part 112 during the flow along the second direction Y, so that when inkjet fluctuations cause color mixing, it only affects the three light-emitting pixels 20 belonging to the same pixel unit area 101. Compared to the existing line bank printing process, which directly affects an entire sub-pixel area in the vertical direction, this embodiment of the invention can improve the yield of the light-emitting pixel 20.

[0060] In addition, this embodiment of the invention also provides a method for manufacturing the display panel described in the above embodiments. Please refer to... Figure 3 as well as Figure 5 The display panel includes a plurality of pixel unit areas 101 arranged in an array along a first direction X and a second direction Y, wherein the first direction X and the second direction Y are opposite, and the method for manufacturing the display panel includes the following steps:

[0061] S10, Provide a substrate.

[0062] S20. A pixel definition layer 10 is formed on the substrate. The pixel definition layer 10 includes a first barrier 11, which is disposed around each pixel unit area 101.

[0063] S30. An organic light-emitting layer is formed on the pixel definition layer 10. The organic light-emitting layer includes a plurality of light-emitting pixels 20. At least two light-emitting pixels 20 arranged along the second direction Y are formed in each pixel unit region 101. The distance from the end of the first barrier 11 away from the substrate to the substrate is greater than the distance from the end of each light-emitting pixel 20 away from the substrate to the substrate. The light-emitting colors of each light-emitting pixel 20 in the same pixel unit region 101 are different.

[0064] In one embodiment of the present invention, please refer to Figure 3 , Figure 5 , Figure 6 as well as Figure 7 The manufacturing method of this display panel includes:

[0065] Multiple second barriers 12 are formed on a substrate using an acrylic material with hydrophilic groups, extending along a first direction X and arranged along a second direction Y.

[0066] In this embodiment of the invention, the display panel may be defined as including a plurality of sub-pixel areas 1011 arranged in an array along a first direction X and a second direction Y, for subsequent formation of a plurality of light-emitting pixels 20. Furthermore, a second barrier 12 is provided within any two adjacent rows of sub-pixel areas 1011 arranged along the second direction Y.

[0067] Next, an acrylic material with hydrophobic groups is used to form a first barrier 11 on the substrate, wherein the display panel is defined to include a plurality of pixel unit regions 101 arranged in an array along the first direction X and the second direction Y, and each pixel unit region 101 includes at least two sub-pixel regions 1011 arranged along the second direction Y. In this embodiment, each pixel unit region 101 includes three sub-pixel regions 1011 as an example.

[0068] The first barrier 11 is arranged around each pixel unit area 101. Specifically, the first barrier 11 includes a plurality of first sub-parts 111 extending along the second direction Y and arranged along the first direction X, and at least one second sub-part 112 extending along the first direction X and arranged along the second direction Y. The setting display panel also includes a plurality of pixel unit area groups 102 arranged along the second direction Y, and each pixel unit area group 102 includes a plurality of pixel unit areas 101 arranged along the first direction X. That is, each row of pixel unit areas 101 arranged along the first direction X is set as a pixel unit area group 102. A first sub-part 111 is provided between any two adjacent pixel unit areas 101 arranged along the first direction X, and a second sub-part 112 is provided between any two adjacent pixel unit area groups 102 arranged along the second direction.

[0069] In this embodiment of the invention, the height of the first retaining wall 11 is greater than the height of the second retaining wall 12.

[0070] Furthermore, a second barrier 12 is formed between any two adjacent sub-pixel regions 1011 arranged along the second direction Y. Thus, between any two adjacent pixel unit regions 101 arranged along the second direction Y, the second sub-part 112 and the second barrier 12 are stacked, and the second sub-part 112 is located on the side of the second barrier 12 away from the substrate.

[0071] Optionally, the height of the first barrier 11 is greater than or equal to 1 micrometer and less than or equal to 1.5 micrometers, while the height of the second barrier 12 is greater than or equal to 0.3 micrometers and less than or equal to 0.5 micrometers. Furthermore, in the pixel definition layer 10, there are barrier overlapping positions, such as the position where the first sub-part 111 overlaps with the second barrier 12 and the position where the second sub-part 112 overlaps with the second barrier 12. The height of the barrier overlapping positions is the same as the height of other positions where only the first barrier 11 is provided.

[0072] Then, an inkjet printing process is used to form multiple light-emitting pixels 20 in the pixel unit area 101, and the multiple light-emitting pixels 20 are set in a one-to-one correspondence with multiple sub-pixel areas 1011. The ink flows in each pixel unit area 101 and is dried to form a film, so as to obtain multiple light-emitting pixels 20 located in each sub-pixel area 1011.

[0073] In this embodiment of the invention, the light-emitting pixels 20 formed in a whole sub-pixel area 1011 arranged along the second direction Y have the same color, and the three light-emitting pixels 20 in the same pixel unit area 101 are connected to cover the second barrier wall 12 located between adjacent light-emitting pixels 20.

[0074] As mentioned above, in this embodiment of the invention, the second sub-part 112 is set to space the pixel unit areas 101 arranged along the second direction Y. Therefore, in the inkjet printing process of the light-emitting pixel 20, the ink flows within each pixel unit area 101. Compared with the existing side-by-side printing process where the ink only flows within a single sub-pixel area, the ink flow area in this embodiment of the invention is increased, which can improve the film uniformity of each light-emitting pixel 20 and reduce the requirements for printing accuracy. In addition, in this embodiment of the invention, the ink is blocked by the second sub-part 112 during the flow along the second direction Y. Therefore, when ink mixing occurs due to inkjet fluctuations, it only affects the three light-emitting pixels 20 belonging to the same pixel unit area 101. Compared with the existing line bank printing process, which directly affects an entire sub-pixel area in the vertical direction, this embodiment of the invention can improve the yield of the light-emitting pixel 20.

[0075] In another embodiment of the invention, please refer to Figure 3 as well as Figure 8 The difference between the manufacturing method of the display panel in this embodiment and the manufacturing method of the display panel in the previous embodiment is that a second sub-part 112 or a second barrier 12 is provided between any two adjacent light-emitting pixels 20 arranged along the second direction Y. That is, only the second sub-part 112 is provided between any two adjacent pixel unit areas 101 arranged along the second direction Y, and no second barrier 12 is provided, so that the orthographic projection of the second sub-part 112 on the substrate does not overlap with the orthographic projection of the second barrier 12 on the substrate.

[0076] In another embodiment of the invention, please refer to Figure 3 as well as Figure 9 The method for manufacturing the display panel in this embodiment, compared to the method for manufacturing the display panel in the first embodiment, includes the following steps:

[0077] A barrier material layer is formed on a substrate using an acrylic material with hydrophilic groups. Then, a semi-transparent mask is used to pattern the barrier material layer to form a first barrier 11 and a second barrier 12.

[0078] Optionally, an acrylic material with hydrophobic groups may be used to form a barrier material layer on the substrate, which is not limited here.

[0079] The difference between this embodiment and the previous embodiment is that, in this embodiment, the first barrier 11 and the second barrier 12 are formed by a semi-transparent mask plate in a photomask process, and the specific setting position and size of the first barrier 11 and the second barrier 12 can be the same as in the previous embodiment, which will not be repeated here.

[0080] In another embodiment of the present invention, please refer to Figure 4 The difference between this embodiment and the first embodiment is that the number of light-emitting pixels 20 in each pixel unit area 101 is 5.

[0081] In summary, because the second sub-part 112 in this embodiment of the invention spaces the pixel unit areas 101 arranged along the second direction Y, the ink flows within each pixel unit area 101 during the inkjet printing process of the light-emitting pixel 20. Compared to the existing side-by-side printing process where the ink only flows within a single sub-pixel area, the ink flow area in this embodiment of the invention is increased, which can improve the film uniformity of each light-emitting pixel 20 and reduce the requirements for printing accuracy. Furthermore, in this embodiment of the invention, the ink is blocked by the second sub-part 112 during the flow along the second direction Y, so that when inkjet fluctuations cause color mixing, it only affects the three light-emitting pixels 20 belonging to the same pixel unit area 101. Compared to the existing line bank printing process, which directly affects an entire sub-pixel area in the vertical direction, this embodiment of the invention can improve the yield of the light-emitting pixel 20.

[0082] In the above embodiments, the descriptions of each embodiment have different focuses. For parts not described in detail in a certain embodiment, please refer to the relevant descriptions in other embodiments.

[0083] The above provides a detailed description of a display panel and its manufacturing method according to embodiments of the present invention. Specific examples have been used to illustrate the principles and implementation methods of the present invention. The description of the above embodiments is only for the purpose of helping to understand the technical solutions and core ideas of the present invention. Those skilled in the art should understand that modifications can still be made to the technical solutions described in the foregoing embodiments, or equivalent substitutions can be made to some of the technical features. These modifications or substitutions do not cause the essence of the corresponding technical solutions to deviate from the scope of the technical solutions of the embodiments of the present invention.

Claims

1. A display panel, characterized in that, The display panel includes a plurality of pixel unit areas arranged in an array along a first direction and a second direction, wherein the first direction and the second direction are different. The display panel also includes a plurality of pixel unit area groups arranged along the second direction, wherein each pixel unit area group is provided with a plurality of pixel unit areas arranged along the first direction. The display panel also includes: substrate; A pixel definition layer is disposed on the substrate and includes a first barrier wall. The first barrier wall is disposed around each pixel unit area. The first barrier wall includes a plurality of first sub-parts extending along the second direction and arranged along the first direction and at least one second sub-part extending along the first direction and arranged along the second direction. A first sub-part is disposed between any two adjacent pixel unit areas arranged along the first direction, and a second sub-part is disposed between any two adjacent pixel unit areas arranged along the second direction. The heights of the first sub-part and the second sub-part are equal. An organic light-emitting layer is disposed on the pixel definition layer and includes a plurality of light-emitting pixels. Each pixel unit area is provided with at least two light-emitting pixels arranged along the second direction. The distance from the end of the first barrier away from the substrate to the substrate is greater than the distance from the end of each light-emitting pixel away from the substrate to the substrate. The light-emitting pixels in the same pixel unit area have the same light-emitting color. The pixel definition layer further includes a plurality of second baffles extending along the first direction and arranged along the second direction. In each pixel unit group, a second baffle is provided between two adjacent light-emitting pixels in each pixel unit group, and the height of the second baffle is less than the thickness of each light-emitting pixel. The second barrier is also disposed between any two adjacent pixel unit groups arranged along the second direction, and between any two adjacent pixel unit groups arranged along the second direction, a second sub-part and a second barrier are stacked, with the second sub-part located on the side of the second barrier away from the substrate.

2. The display panel according to claim 1, characterized in that, Within the same pixel unit group, the number of light-emitting pixels in each pixel unit area is the same.

3. The display panel according to claim 2, characterized in that, The sum of the heights of the stacked second sub-part and the second retaining wall is equal to the height of the portion of the first sub-part located between two adjacent pixel unit areas.

4. The display panel according to claim 2, characterized in that, The first retaining wall is made of a different material than the second retaining wall. The first retaining wall is hydrophobic, while the second retaining wall is hydrophilic.

5. The display panel according to claim 2, characterized in that, The first retaining wall is made of the same material as the second retaining wall, and both the first retaining wall and the second retaining wall are hydrophilic.

6. The display panel according to claim 1, characterized in that, Between two adjacent pixel unit regions along the second direction, the number of light-emitting pixels in one pixel unit region may be the same as or different from the number of light-emitting pixels in the other pixel unit region.

7. The display panel according to claim 1, characterized in that, The number of light-emitting pixels in each pixel unit area is less than or equal to 6.

8. A method for manufacturing a display panel, characterized in that, The display panel includes a plurality of pixel unit areas arranged in an array along a first direction and a second direction, wherein the first direction and the second direction are different. The display panel also includes a plurality of pixel unit area groups arranged along the second direction, wherein each pixel unit area group is provided with a plurality of pixel unit areas arranged along the first direction. The method for manufacturing the display panel includes: Provide substrate; A pixel definition layer is formed on the substrate. The pixel definition layer includes a first barrier and a second barrier. The second barrier extends along the first direction and is arranged along the second direction. The first barrier surrounds each pixel unit region. The first barrier includes a plurality of first sub-parts extending along the second direction and arranged along the first direction and at least one second sub-part extending along the first direction and arranged along the second direction. A first sub-part is disposed between any two adjacent pixel unit regions arranged along the first direction, and a second sub-part is disposed between any two adjacent pixel unit regions arranged along the second direction. An organic light-emitting layer is formed on the pixel definition layer. The organic light-emitting layer includes a plurality of light-emitting pixels. At least two light-emitting pixels are formed in each pixel unit area and arranged along the second direction. The distance from the end of the first barrier away from the substrate to the substrate is greater than the distance from the end of each light-emitting pixel away from the substrate to the substrate. The light-emitting pixels in the same pixel unit area have the same light-emitting color. The second barrier is further disposed between any two adjacent pixel unit groups arranged along the second direction, and between any two adjacent pixel unit groups arranged along the second direction, a second sub-part and a second barrier are stacked, with the second sub-part located on the side of the second barrier away from the substrate. Within each pixel unit group, a second barrier is provided between two adjacent light-emitting pixels in each pixel unit group, and the height of the second barrier is less than the thickness of each light-emitting pixel, and the heights of the first sub-part and the second sub-part are equal.

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