Display Panel

Abstract

The present application discloses a display panel. The display panel includes a substrate and a plurality of pixel groups. The plurality of pixel groups are arranged on the substrate. The pixel groups include a first pixel group, a second pixel group and a third pixel group. Along the second direction, a plurality of first pixel groups and a plurality of second pixel groups are alternately arranged to form a first pixel row, and a plurality of third pixel groups are arranged to form a second pixel row. Along the first direction, at least one second pixel row is provided between each two adjacent first pixel rows. Among them, the first pixel group includes at least two first sub-pixels arranged along the second direction, the second pixel group includes at least two second sub-pixels arranged along the second direction, and the third pixel group includes at least one third sub-pixel arranged along the second direction. The present application can improve the yield rate and pixel resolution of the display panel while maintaining the accuracy of the inkjet printing device.

Description

Technical Field

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

[0002] OLED (Organic Light Emitting Diode) has the advantages of being fully solid-state, ultra-thin, no viewing angle limitation, fast response, working at room temperature, and easy to realize flexible display and 3D display. It is unanimously recognized as the mainstream technology for the next generation of display. At present, there are two main ways to form the light-emitting layer of OLED, namely vacuum thermal evaporation and inkjet printing. Compared with vacuum thermal evaporation, inkjet printing does not require the use of a mask, and the material utilization rate can reach 100%.

[0003] The high-precision inkjet heads used in conventional printing technology can produce droplet sizes ranging from 1 to 10pL (picoliters). Higher resolutions require the use of smaller and more precise print heads, which increases hardware costs. At the same time, due to the influence of inkjet accuracy, printing is generally performed in a direction perpendicular to the nozzles, allowing more nozzles to inject ink droplets into sub-pixels. At present, the pixel arrangements are mainly SBS (side by side) architecture and LB (line bank) architecture. The advantage of the SBS architecture is that it saves more ink materials, but it has high requirements for the inkjet accuracy of the hardware. The LB architecture has low requirements for accuracy perpendicular to the printing direction and is more suitable for printing high-resolution products, but it consumes more ink, and if there is a problem with the retaining wall somewhere, it will cause a large range of pixels to be affected, affecting the product yield.

[0004] Therefore, it is urgent to design a new pixel arrangement architecture that can improve the product yield and be suitable for display panels with higher pixel resolution without changing the accuracy of the inkjet printing device. Summary of the invention

[0005] The present application provides a display panel, so as to provide a display panel with a novel pixel arrangement structure, which can improve the product yield and pixel resolution while maintaining the accuracy of the inkjet printing device.

[0006] The present application provides a display panel, comprising:

[0007] substrate;

[0008] A plurality of pixel groups, wherein the plurality of pixel groups are arranged on the substrate, the pixel groups include a first pixel group, a second pixel group and a third pixel group, the plurality of the first pixel groups and the plurality of the second pixel groups are alternately arranged along a second direction to form a first pixel row, the plurality of the third pixel groups are arranged along the second direction to form a second pixel row, and along the first direction, at least one second pixel row is arranged between every two adjacent first pixel rows, and the second direction intersects the first direction;

[0009] The first pixel group includes at least two first sub-pixels arranged along the second direction, the second pixel group includes at least two second sub-pixels arranged along the second direction, and the third pixel group includes at least one third sub-pixel arranged along the second direction.

[0010] Optionally, in some embodiments of the present application, in the first pixel group, a plurality of the first sub-pixels are arranged into two rows along the first direction, and the number of the first sub-pixels in each row is equal; in the second pixel group, a plurality of the second sub-pixels are arranged into two rows along the first direction, and the number of the second sub-pixels in each row is equal; in the third pixel group, a plurality of the third sub-pixels are arranged into a row along the first direction.

[0011] Optionally, in some embodiments of the present application, in the first pixel group and the second pixel group, a plurality of the first sub-pixels and a plurality of the second sub-pixels are axially symmetrically arranged, and the first pixel group and the second pixel group are alternately arranged along the first direction.

[0012] Optionally, in some embodiments of the present application, in the first pixel group and the second pixel group, multiple first sub-pixels and multiple second sub-pixels are axially symmetrically arranged, and along the second direction, the first pixel group and the second pixel group are located in different columns.

[0013] Optionally, in some embodiments of the present application, along the second direction, the display panel has a first end and a second end that are oppositely arranged, the first pixel group includes a first pixel structure, a second pixel structure and a third pixel structure, the first pixel structure extends along the first direction, the second pixel structure extends from the first pixel structure to the first end, the third pixel structure extends from the first pixel structure to the second end, the second pixel structure and the third pixel structure are located in different rows, and the second pixel group has the same structure as the first pixel group;

[0014] Two second pixel rows are arranged between every two adjacent first pixel rows, and each of the third sub-pixels corresponds to one first sub-pixel and one second sub-pixel.

[0015] Optionally, in some embodiments of the present application, the first pixel structure includes two first sub-pixels arranged along the first direction, the second pixel structure and the third pixel structure each include one first sub-pixel, and the third pixel group includes two third sub-pixels.

[0016] Optionally, in some embodiments of the present application, in the first pixel group, a plurality of the first sub-pixels are arranged in a row along the first direction, and in the second pixel group, a plurality of the second sub-pixels are arranged in a row along the first direction, and the first pixel row and the second pixel row are alternately arranged along the first direction.

[0017] Optionally, in some embodiments of the present application, in the first pixel group, a plurality of the first sub-pixels are arranged in a row along the first direction, and in the second pixel group, a plurality of the second sub-pixels are arranged in a row along the first direction, and along the first direction, in every four adjacent rows of the pixel group, two rows of the second pixels are arranged between two rows of the first pixels;

[0018] Among them, the first sub-pixel is one of a red sub-pixel and a green sub-pixel, the second sub-pixel is the other of the red sub-pixel and the green sub-pixel, the third sub-pixel is a blue sub-pixel, and one adjacent first sub-pixel, one adjacent second sub-pixel and two adjacent third sub-pixels constitute a pixel unit.

[0019] Optionally, in some embodiments of the present application, along the first direction, the first pixel groups located in two adjacent first pixel rows are arranged in a one-to-one correspondence or in an alternating arrangement.

[0020] Optionally, in some embodiments of the present application, the display panel further includes a first retaining wall and a second retaining wall;

[0021] The first retaining wall is arranged on the substrate and located in the gap between adjacent sub-pixels in the same pixel group. The second retaining wall is arranged on the substrate and located in the gap between adjacent pixel groups. The height of the first retaining wall is less than the height of the second retaining wall.

[0022] Optionally, in some embodiments of the present application, the first retaining wall is also located between adjacent pixel groups, and the second retaining wall at least covers a portion of the first retaining wall.

[0023] Optionally, in some embodiments of the present application, the display panel further includes a plurality of anodes, a plurality of light-emitting layers and a cathode;

[0024] A plurality of anodes are arranged on the substrate at intervals. In each pixel group, a first retaining wall is provided between two adjacent anodes. Each light-emitting layer is provided on a side of the corresponding anode away from the substrate. The cathode is provided on a side of the light-emitting layer away from the substrate and covers the first retaining wall, the second retaining wall and the light-emitting layer.

[0025] The present application provides a display panel. The display panel includes a substrate and a plurality of pixel groups. The pixel groups include a first pixel group, a second pixel group and a third pixel group. The first pixel group and the second pixel group are alternately arranged along the second direction to form a first pixel row, and the third pixel group is arranged along the second direction to form a second pixel row. Along the first direction, at least one second pixel row is provided between each two adjacent first pixel rows. The present application sets the first pixel group to include at least two first sub-pixels arranged along the second direction, and the second pixel group to include at least two second sub-pixels arranged along the second direction. On the one hand, when inkjet printing is performed along the first direction, the printing range corresponding to at least the first pixel group and the second pixel group is effectively guaranteed along the direction perpendicular to the printing, thereby improving the utilization rate of the printing nozzle, reducing the inkjet printing time, and being suitable for printing the first sub-pixel and the second sub-pixel of smaller size, thereby improving the pixel resolution. On the other hand, since the first pixel group and the second pixel group are located in the first pixel row and are alternately arranged, when the first pixel group, the second pixel group or the third pixel group prints an error, it will not affect a large range of pixel areas, thereby improving the product yield. BRIEF DESCRIPTION OF THE DRAWINGS

[0026] In order to more clearly illustrate the technical solutions in the embodiments of the present application, the drawings required for use in the description of the embodiments will be briefly introduced below. Obviously, the drawings described below are only some embodiments of the present application. For those skilled in the art, other drawings can be obtained based on these drawings without creative work.

[0027] Figure 1 is a first structural schematic diagram of a display panel provided by the present application;

[0028] Figure 2 This application provides Figure 1 The middle part shows a schematic diagram of the cross-sectional structure of the panel along AA';

[0029] Figure 3 is a second structural schematic diagram of a display panel provided by the present application;

[0030] Figure 4 is a third structural schematic diagram of a display panel provided by the present application;

[0031] Figure 5 It is a schematic diagram of the principle of inkjet printing on a display panel provided by the present application;

[0032] Figure 6 is a fourth structural schematic diagram of a display panel provided by the present application;

[0033] Figure 7 is a fifth structural schematic diagram of a display panel provided by the present application;

[0034] Figure 8 is a sixth structural schematic diagram of a display panel provided by the present application;

[0035] Fig. 9 is a seventh structural schematic diagram of a display panel provided by the present application;

[0036] Figures 10A-10E It is a schematic diagram of the manufacturing process of the display panel provided in this application. DETAILED DESCRIPTION

[0037] The technical solutions in the embodiments of the present application will be clearly and completely described below in conjunction with the drawings in the embodiments of the present application. Obviously, the described embodiments are only part of the embodiments of the present application, rather than all of the embodiments. Based on the embodiments in the present application, all other embodiments obtained by those skilled in the art without making creative work are within the scope of protection of the present application. In addition, it should be understood that the specific implementation methods described herein are only used to illustrate and explain the present application, and are not used to limit the present application. In the present application, unless otherwise stated, the directional words used, such as "up", "down", "left", and "right", generally refer to the up, down, left, and right of the device in actual use or printing state, specifically the drawing direction in the accompanying drawings.

[0038] The present application provides a display panel, which is described in detail below. It should be noted that the description order of the following embodiments does not limit the preferred order of the embodiments of the present application. In the following embodiments, the description of each embodiment has its own emphasis. For parts that are not described in detail in a certain embodiment, please refer to the relevant description of other embodiments.

[0039] See also Figure 1 and Figure 2 , Figure 1 It is a first planar structural schematic diagram of the display panel provided in the present application. Figure 2 This application provides Figure 1Schematic diagram of the cross-sectional structure of the display panel along AA'. In an embodiment of the present application, the display panel 100 includes a substrate 30 and a plurality of pixel groups 10. The plurality of pixel groups 10 are arranged on the substrate 30. The pixel groups 10 include a first pixel group 11, a second pixel group 12, and a third pixel group 13. The plurality of first pixel groups 11 and the plurality of second pixel groups 12 are alternately arranged along the second direction to form a first pixel row 21. The third pixel group 13 is alternately arranged along the second direction to form a second pixel row 22. Along the first direction, at least one second pixel row 22 is provided between each two adjacent first pixel rows 21.

[0040] The first pixel group 11 includes at least two first sub-pixels 101 arranged along the second direction. The second pixel group 12 includes at least two second sub-pixels 102 arranged along the second direction. The third pixel group 13 includes at least one third sub-pixel 103 arranged along the second direction. The second direction intersects the first direction.

[0041] Among them, the first direction is the direction extending along the Y axis, and the second direction is the direction extending along the X axis. Optionally, the first direction and the second direction are perpendicularly intersecting, and can be specifically set according to the specifications of the display panel 100. Of course, in some embodiments, the second direction can also be the direction extending along the Y axis, and the first direction can be the direction extending along the X axis. It should be noted that the embodiments of the present application are all described by taking the first direction as the direction extending along the Y axis and the second direction as the direction extending along the X axis as an example, but it cannot be understood as a limitation of the present application.

[0042] In the display panel 100 provided in the embodiment of the present application, since the first pixel group 11 includes at least two first sub-pixels 101 arranged along the second direction, and the second pixel group 12 includes at least two second sub-pixels 102 arranged along the second direction, when the first pixel group 11 and the second pixel group 12 are inkjet printed along the first direction, on the one hand, along the direction perpendicular to the printing, the printing range corresponding to at least the first pixel group 11 and the second pixel group 12 is effectively guaranteed, thereby improving the utilization rate of the printing nozzle. On the other hand, it can be suitable for printing the first sub-pixel 101 and the second sub-pixel 102 with a smaller size when the hardware accuracy such as the ejection single drop volume and the impact accuracy of the inkjet printing device remains unchanged, thereby improving the pixel resolution of the display panel 100. On the third hand, due to the nozzle hardware processing, the volume ejected by each nozzle will be slightly different. Therefore, when the number of nozzles involved is more, the more averaged it can be, so the uneven film thickness caused by the difference in ejection volume of different nozzles can be compensated, and the light color uniformity of the display panel 100 can be improved. In addition, since the first pixel group 11 and the second pixel group 12 are located in the first pixel row 21 and are arranged alternately, when a printing error occurs in the first pixel group 11, the second pixel group 12 or the third pixel group 13, it will only affect the adjacent pixel groups 10 but not a large range of pixel groups 10, thereby improving the product yield.

[0043] In the embodiment of the present application, the first pixel group 11, the second pixel group 12 and the third pixel group 13 display different colors respectively. The first sub-pixel 101, the second sub-pixel 102 and the third sub-pixel 103 can be one of red sub-pixel, blue sub-pixel and red sub-pixel respectively.

[0044] In the embodiment of the present application, since the third pixel group 13 is separately arranged in the second pixel row 22, the number of third sub-pixels 103 in the third pixel group 13 is not limited. For example, the second pixel row 22 can be composed of one third pixel group 13. Thus, the printing efficiency of the third pixel group 13 can be maximized.

[0045] In the embodiment of the present application, the display panel 100 further includes a first retaining wall 32 and a second retaining wall 33. The first retaining wall 32 is disposed on the substrate 30 and is at least located in the gap between adjacent sub-pixels (the first sub-pixel 101, the second sub-pixel 102 or the third sub-pixel 103) in the same pixel group 10. The second retaining wall 33 is disposed on the substrate 30 and is located in the gap between adjacent pixel groups 10. The height of the first retaining wall 32 is less than the height of the second retaining wall 33.

[0046] In the embodiment of the present application, only the second retaining wall 33 may be provided between adjacent pixel groups 10. Alternatively, the first retaining wall 32 is also located in a portion of the space between adjacent pixel groups 10, that is, the first retaining wall 32 is provided between adjacent sub-pixels and between adjacent pixel groups 10. The second retaining wall 33 covers at least a portion of the first retaining wall 32 and the substrate 30. Alternatively, the gaps between adjacent pixel groups 10 are all provided with the first retaining wall 32, and the second retaining wall 33 is provided above the first retaining wall 32. Thus, the height difference between the first retaining wall 32 and the second retaining wall 33 is increased to avoid color mixing between adjacent pixel groups 10 during printing.

[0047] In the embodiment of the present application, the display panel 100 further includes but is not limited to an anode 31 , a light emitting layer 34 , an electron transport layer / electron injection layer 35 , a cathode 36 and an encapsulation layer 37 .

[0048] Among them, a plurality of anodes 31 are arranged on the substrate 30 at intervals. In each pixel group 10, a first retaining wall 32 is arranged between two adjacent anodes 31. Each light-emitting layer 34 is arranged on the side of the corresponding anode 31 away from the substrate 30. The electron transport layer / electron injection layer 35 is arranged on the side of the light-emitting layer 34 away from the substrate 30, and covers the first retaining wall 32, the second retaining wall and the light-emitting layer 34. The cathode 36 is arranged on the side of the electron transport layer / electron injection layer 35 away from the substrate 30.

[0049] certainly, Figure 2The cross-sectional structure of the display panel 100 shown is only for the purpose of facilitating the understanding of the arrangement of the pixel group 10 and should not be construed as a limitation of the present application. In some embodiments of the present application, the display panel 100 may not include the electron transport layer / electron injection layer 35. Alternatively, a hole transport layer and a hole injection layer may be provided between the anode 31 and the light-emitting layer 34, which is not specifically limited in the present application.

[0050] In the embodiment of the present application, the height of the first retaining wall 32 is 0.3 micrometer to 0.6 micrometer. The height of the second retaining wall 33 is 0.9 micrometer to 1.2 micrometer. The height of the light-emitting layer 34 is 10 nanometers to 200 nanometers. For example, the height of the first retaining wall 32 can be 0.3 micrometer, 0.4 micrometer, 0.5 micrometer, 0.6 micrometer, etc. The height of the second retaining wall 33 can be 0.9 micrometer, 1 micrometer, 1.1 micrometer, 1.2 micrometer, etc. The height of the light-emitting layer 34 can be 10 nanometers, 50 nanometers, 100 nanometers, 150 nanometers, 200 nanometers, etc.

[0051] It is understandable that when inkjet printing is performed on each pixel group 10 using inkjet printing technology, luminescent material may remain on the upper surface of the first retaining wall 32, but it does not affect the distinction between multiple sub-pixels in each pixel group 10. This is because each sub-pixel will only emit light in the area where the anode 31 is located. In addition, in the embodiment of the present application, the height of the second retaining wall 33 is set to be greater than the height of the first retaining wall 32, which can effectively prevent color mixing between adjacent pixel groups 10.

[0052] In addition, in an embodiment of the present application, the substrate 30 may be an array substrate. Functional layers such as a driving transistor are provided on the array substrate to drive the pixel group 10 to emit light normally. For example, the array substrate includes but is not limited to a substrate, a light shielding layer arranged on the substrate, a buffer layer arranged on the substrate and covering the light shielding layer, an active layer, a gate insulating layer and a gate arranged on the buffer layer stacked from bottom to top, and an interlayer dielectric layer arranged above the buffer layer and covering the active layer, the gate insulating layer and the gate. Among them, the active layer includes a channel region and a source region and a drain region located on both sides of the channel region. The source electrode arranged on the interlayer dielectric layer is electrically connected to the source region. The drain electrode arranged on the interlayer dielectric layer is electrically connected to the drain region. The source and drain electrodes may also be covered with a stacked passivation layer and / or a flat layer. The anode is arranged on the passivation layer or the flat layer.

[0053] Please continue reading Figure 1 and Figure 2 In the first pixel group 11, a plurality of first sub-pixels 101 are arranged in two rows along the first direction, and the number of first sub-pixels 101 in each row is equal. In the second pixel group 12, a plurality of second sub-pixels 102 are arranged in two rows along the first direction, and the number of second sub-pixels 102 in each row is equal. In the third pixel group 13, a plurality of third sub-pixels 103 are arranged in a row along the first direction.

[0054] That is, each first pixel group 11 includes an even number of first sub-pixels 101. Each second pixel group 12 includes an even number of second sub-pixels 102. The arrangement of the third sub-pixels 103 in the third pixel group 13 can be set according to the structures of the first sub-pixels 101 and the second sub-pixels 102.

[0055] Specifically, in the embodiment of the present application, in the first pixel group 11 and the second pixel group 12, the plurality of first sub-pixels 101 and the plurality of second sub-pixels 102 are arranged axially symmetrically. The axis of symmetry extends along the first direction or the second direction. Along the second direction, the first pixel group 11 and the second pixel group 12 are located in different columns, such as Figure 1 The middle dotted box M represents a column. At this time, in the third pixel group 13, a plurality of third sub-pixels 103 are arranged in a row along the first direction. At least one second pixel row 22 is disposed between every two adjacent first pixel rows 21.

[0056] For example, Figure 1 As shown, the first pixel group 11 includes four first sub-pixels 101. The second pixel group 12 includes four second sub-pixels 102. Each third pixel group includes four third sub-pixels 103. The first sub-pixels 101, the second sub-pixels 102, and the third sub-pixels 103 are arranged in an array. A second pixel row 22 is provided between each two adjacent first pixel rows 21. The areas of each first sub-pixel 101, each second sub-pixel 102, and each third sub-pixel 103 are equal.

[0057] The first sub-pixel 101, the second sub-pixel 102 and the third sub-pixel 103 can be red, green and blue sub-pixels respectively. Each adjacent first sub-pixel 101, second sub-pixel 102 and third sub-pixel 103 constitutes a pixel unit 10a.

[0058] Of course, when the third sub-pixel 103 is a blue sub-pixel, the luminous intensity of the blue sub-pixel is relatively weak, and a plurality of second pixel rows 22 may be provided between each two adjacent first pixel rows 21. At this time, each adjacent first sub-pixel 101, second sub-pixel 102, and a plurality of third sub-pixels 103 constitute a pixel unit 10a, thereby improving the luminous effect of the pixel unit 10a.

[0059] In addition, because the second pixel row 22 is only composed of the third pixel group 13, each third pixel group 13 may also include 2 third sub-pixels 103, 6 third sub-pixels 103, 8 third sub-pixels 103, a row of third sub-pixels 103, etc., which is not specifically limited in the present application.

[0060] For example, see Figure 3 , Figure 3 is a second structural schematic diagram of a display panel provided by the present application. Figure 1 The difference of the display panel 100 shown is that, in the embodiment of the present application, the first pixel group 11 includes 6 first sub-pixels 101, and the second pixel group 12 includes 6 second sub-pixels 102. Along the second direction, the plurality of first pixel groups 11 and the plurality of second pixel groups 12 are alternately arranged along the first direction.

[0061] Wherein, along the first direction, each adjacent first sub-pixel 101, second sub-pixel 102 and third sub-pixel 103 constitute a pixel unit 10a. Similarly, in each third pixel group 13, the number of third sub-pixels 103 can be set according to actual conditions. The areas of each first sub-pixel 101, each second sub-pixel 102 and each third sub-pixel 103 are equal. Of course, due to process errors and other reasons, equal areas can also be understood as approximately equal areas.

[0062] See also Figure 4 , Figure 4 is a third structural schematic diagram of a display panel provided in the present application. Figure 1 The difference of the display panel 100 shown is that, in the embodiment of the present application, along the second direction, the display panel 100 has a first end 100a and a second end 100b arranged opposite to each other. The first pixel group 11 includes a first pixel structure 111, a second pixel structure 112 and a third pixel structure 113. The first pixel structure 111 extends along the first direction. The second pixel structure 112 extends from the first pixel structure 111 to the first end 100a. The third pixel structure 113 extends from the first pixel structure 111 to the second end 100b. The second pixel structure 112 and the third pixel structure 113 are located in different rows. Among them, the first pixel structure 111 and the third pixel structure 113 are pixel combinations with different arrangement shapes composed of at least one first sub-pixel 101. The first pixel structure 111 and the second pixel structure 112 are both pixel combinations with the same arrangement shape composed of at least one first sub-pixel 101.

[0063] That is, the plurality of first sub-pixels 101 in the first pixel group 11 are arranged in a "Z" shape. The second pixel group 12 has the same structure as the first pixel group 11 and is also arranged in a "Z" shape, which will not be described in detail here. Two second pixel rows 22 are arranged between each two adjacent first pixel rows 21. Each third sub-pixel 103 is arranged corresponding to one first sub-pixel 101 and one second sub-pixel 102.

[0064] The first sub-pixel 101 is one of a red sub-pixel and a green sub-pixel, the second sub-pixel 102 is the other of the red sub-pixel and the green sub-pixel, and the third sub-pixel 103 is a blue sub-pixel.

[0065] It is understandable that due to the characteristics of RGB materials, the fluorescence lifetimes of the green sub-pixel and the red sub-pixel are greater than the fluorescence lifetime of the blue sub-pixel. Therefore, a third sub-pixel 103 is arranged corresponding to a first sub-pixel 101 and a second sub-pixel 102, so that the area of ​​each third sub-pixel 103 is greater than the area of ​​each first sub-pixel 101, and the area of ​​each third sub-pixel 103 is greater than the area of ​​each second sub-pixel 102, thereby balancing the luminous lifetime of each sub-pixel and ensuring the luminous uniformity of the display panel 100.

[0066] Of course, in other embodiments of the present application, the extension length of the third sub-pixel 103 along the first direction may also be increased so that the light-emitting area of ​​the third sub-pixel 103 is maximized.

[0067] Further, such as Figure 4 As shown, in the embodiment of the present application, the first pixel structure 111 includes two first sub-pixels 101 arranged along the first direction. The second pixel structure 112 and the third pixel structure 113 each include a first sub-pixel 101. The third pixel group 13 includes two third sub-pixels 103. Each third sub-pixel 103 and an adjacent first sub-pixel 101 and a second sub-pixel 102 form a pixel unit 10a.

[0068] Understandable, see Figure 5 , Figure 5 1 is a schematic diagram of the principle of inkjet printing on a display panel provided by the present application. Inkjet printing usually uses an inkjet printing device (not shown in the figure). The inkjet printing device includes a plurality of print heads 40. Figure 5 Only one print head 40 is shown as an illustration, which should not be construed as limiting the present application. Usually, for the sake of printing stability, the print head 40 is fixed, and the display panel 100 moves in a direction perpendicular to the printing direction.

[0069] Each print head 40 includes a plurality of nozzles 41. The print head 40 ejects printing materials through the plurality of nozzles 41 to print on the display panel 100 to be printed. For example, when an inkjet printing device is used to print the pixel group 10 of the display panel 100, the printing material may be a red light emitting material, a green light emitting material, a blue light emitting material, a white light emitting material, etc.

[0070] The traditional SBS architecture is to make pixel holes on the entire pixel definition layer, and the luminescent material is printed in the hole. However, the luminescent materials of the same color are separated by the pixel definition layer to form a plurality of independently distributed sub-pixels, which cannot realize continuous printing of the inkjet printing process, and reduces the printing efficiency. Therefore, compared with the existing SBS architecture in which only two nozzles 41 are used for printing for each sub-pixel, in the embodiment of the present application, in each pixel group 10, when the pixel group 10 is set to include at least two sub-pixels arranged along the second direction, at least 4 nozzles 41 can be used to eject printing materials at the same time for each pixel group 10. Further, when multiple sub-pixels are arranged in a "Z" shape, at least 6 nozzles 41 can be used to eject printing materials at the same time for each pixel group 10. This ensures that each pixel group 10 has a sufficient printing range when performing inkjet printing. This improves the utilization rate of the nozzle 41 and reduces the inkjet printing time.

[0071] See also Figure 6 , Figure 6 is a fourth structural schematic diagram of a display panel provided in the present application. Figure 4 The difference of the display panel 100 shown is that, in the embodiment of the present application, the first pixel structure 111 includes two first sub-pixels 101 arranged along the first direction. The second pixel structure 112 and the third pixel structure 113 each include two first sub-pixels 101 arranged along the second direction. The third pixel group 13 includes two third sub-pixels 103.

[0072] The area of ​​each first sub-pixel 101 is equal to the area of ​​each second sub-pixel 102. The area of ​​each third sub-pixel 103 is larger than the area of ​​each first sub-pixel 101 (each second sub-pixel 102). Specifically, one third sub-pixel 103 is arranged corresponding to at least one first sub-pixel 101 and at least one second sub-pixel 102, so that the area of ​​the first sub-pixel 101 is larger than the area of ​​the first sub-pixel 101, and the area of ​​the third sub-pixel 103 is larger than the area of ​​the second sub-pixel 102, thereby balancing the luminous life of each sub-pixel.

[0073] Each third sub-pixel 103 forms a pixel unit 10a with two adjacent first sub-pixels 101 and two second sub-pixels 102. Two adjacent third sub-pixels 103 located in the same row share one first sub-pixel 101 or one second sub-pixel 102.

[0074] The pixel architecture in the embodiment of the present application can further improve the pixel resolution of the display panel 100 by sharing the first sub-pixel 101 or the second sub-pixel 102 between adjacent pixel units 10a. In addition, the embodiment of the present application makes the number and arrangement of the first sub-pixel 101, the second sub-pixel 102 or the third sub-pixel 103 in the pixel group 10 more flexible.

[0075] See also Figure 7 , Figure 7 is a fifth structural diagram of a display panel provided in the present application. Figure 1 The difference of the display panel 100 shown is that, in the embodiment of the present application, in the first pixel group 11, a plurality of first sub-pixels 101 are arranged in a row along the first direction. In the second pixel group 12, a plurality of second sub-pixels 102 are arranged in a row along the first direction. The first pixel row 21 and the second pixel row 22 are alternately arranged along the first direction. The areas of each first sub-pixel 101, each second sub-pixel 102, and each third sub-pixel 103 are equal.

[0076] Further, in some embodiments of the present application, Figure 7 As shown, the first pixel group 11 includes two first sub-pixels 101. The second pixel group 12 includes two second sub-pixels 102. The third pixel group 13 includes two third sub-pixels 103. The first sub-pixels 101, the second sub-pixels 102, and the third sub-pixels 103 are arranged in an array. One adjacent first sub-pixel 101, one second sub-pixel 102, and two third sub-pixels 103 constitute a pixel unit 10a.

[0077] Wherein, along the first direction, the first pixel groups 11 located in two adjacent first pixel rows 21 are arranged alternately. Of course, in other embodiments, the first pixel groups 11 located in two adjacent first pixel rows 21 may also be arranged in a one-to-one correspondence.

[0078] In other embodiments of this application, please refer to Figure 8 , Figure 8 is a sixth structural schematic diagram of a display panel provided in the present application. Figure 7 The difference of the display panel 100 shown is that, in the embodiment of the present application, the first pixel group 11 includes three first sub-pixels 101. The second pixel group 12 includes three second sub-pixels 102. The third pixel group 13 includes three third sub-pixels 103. The areas of each first sub-pixel 101, each second sub-pixel 102, and each third sub-pixel 103 are equal.

[0079] Among them, a first sub-pixel 101, a second sub-pixel 102 and two third sub-pixels 103 adjacent to each other constitute a pixel unit 10a. It should be noted that in the embodiment of the present application, the pixel unit 10a has two forms, specifically as follows Figure 8 The embodiment of the present application makes the arrangement of the first sub-pixel 101, the second sub-pixel 102 or the third sub-pixel 103 in the pixel group 10 more flexible.

[0080] Of course, in other embodiments of the present application, the first pixel group 11 may include more than three first sub-pixels 101. The second pixel group 12 may include more than three second sub-pixels 102. The third pixel group 13 may include more than three third sub-pixels 103. All of them are not described here.

[0081] See also Fig. 9 , Fig. 9 is a seventh structural diagram of a display panel provided in the present application. Figure 7 The difference of the display panel 100 shown is that, in the embodiment of the present application, along the first direction, in every four adjacent pixel groups 10 , two second pixel rows 22 are arranged between two first pixel rows 21 .

[0082] The first sub-pixel 101 is one of a red sub-pixel and a green sub-pixel. The second sub-pixel 102 is the other of a red sub-pixel and a green sub-pixel. The third sub-pixel 103 is a blue sub-pixel. One adjacent first sub-pixel 101, one second sub-pixel 102, and two third sub-pixels 103 constitute a pixel unit 10a. It should be noted that: Fig. 9 The dotted box in the figure shows only one structure of the pixel unit 10a. In other embodiments of the present application, the pixel unit 10a may also be as follows: Figure 7 The 2*2 matrix structure shown in .

[0083] From the above analysis, it can be known that the third sub-pixel 103 is a blue sub-pixel. One pixel unit 10a includes two third sub-pixels 103, which can improve the luminous effect of the pixel unit 10a. Among them, the areas of each first sub-pixel 101, each second sub-pixel 102 and each third sub-pixel 103 are equal.

[0084] Correspondingly, the present application also provides a method for manufacturing a display panel. Figure 1 and Figures 10A-10E , Figures 10A-10E It is a schematic diagram of the manufacturing process of the display panel provided in this application.

[0085] The manufacturing method of the display panel 100 includes the following steps:

[0086] Step 101: provide a substrate.

[0087] The substrate 30 may include a substrate and functional film layers such as a driving transistor disposed on the substrate. For details, please refer to the above content and will not be described in detail here.

[0088] Step 102, forming a plurality of pixel groups 10 on the substrate. The plurality of pixel groups 10 are disposed on the substrate 30 and arranged into a plurality of first pixel rows 21 and second pixel rows 22 along a first direction. The pixel groups 10 include a first pixel group 11, a second pixel group 12, and a third pixel group 13. The first pixel group 11 and the second pixel group 12 are located in the first pixel row 21 and are alternately arranged along a second direction. The third pixel group 13 is located in the second pixel row 22. At least one second pixel row 22 is provided between each two adjacent first pixel rows 21.

[0089] The first pixel group 11 includes at least two first sub-pixels 101 arranged along the second direction. The second pixel group 12 includes at least two second sub-pixels 102 arranged along the second direction. The third pixel group 13 includes at least one third sub-pixel 103 arranged along the second direction. The second direction intersects the first direction.

[0090] Specifically, step 102 specifically includes:

[0091] like Fig. 10A As shown, a plurality of anodes 31 are formed on a substrate 30 and are spaced apart from each other.

[0092] like Fig. 10B As shown, a first barrier wall 32 is formed on a substrate 30 by an exposure and development process. The first barrier wall 32 is located at the gap between adjacent anodes 31. A plurality of second barrier walls 33 are formed on the substrate 30 by an exposure and development process. The second barrier walls 33 are located at the gap between adjacent pixel groups 10 and cover at least a portion of the corresponding first barrier walls 32.

[0093] That is, by forming patterned first retaining walls 32 and second retaining walls 33, a plurality of pixel groups 10 can be formed in the display panel 100, and a plurality of sub-pixels can be formed in each pixel group 10. The heights of the second retaining walls 33 and the first retaining walls 32 can refer to the above embodiments, and will not be described in detail here.

[0094] like Fig. 10C As shown, a corresponding light emitting layer 34 is formed on a side of each anode 31 away from the substrate 30 by using an inkjet printing process.

[0095] Due to the blocking effect of the second retaining wall 33, no color mixing occurs between adjacent pixel groups 10. In the same pixel group 10, due to the setting of the first retaining wall 32, the printed luminescent material can flow to form multiple luminescent layers 34 corresponding to the anodes 31.

[0096] Finally, if Fig.10EAs shown, a cathode 36 is formed on the side of the light-emitting layer 34 away from the substrate 30 by evaporation or magnetron sputtering. An encapsulation layer 37 is formed on the side of the cathode 36 away from the substrate 30. The encapsulation layer 37 can be formed by stacking inorganic / organic / inorganic materials, which is not specifically limited in the present application.

[0097] Of course, in the embodiment of the present application, a hole injection layer / hole transport layer may be formed between the anode 31 and the light-emitting layer 34 by inkjet printing. Alternatively, an electron transport layer / electron injection layer 35 may be formed between the light-emitting layer 34 and the cathode 36 by inkjet printing or evaporation.

[0098] Among them, for the display panel 100 with different pixel structures provided in the embodiment of the present application, in the above method, it can be achieved by changing the patterning method of the first retaining wall 32 and the second retaining wall 33, which will not be described in detail here.

[0099] In the display panel 100 manufactured in the embodiment of the present application, by setting the first pixel group 11 to include at least two first sub-pixels 101 arranged along the second direction, and the second pixel group 12 to include at least two second sub-pixels 102 arranged along the second direction, on the one hand, when inkjet printing is performed along the first direction, the printing range corresponding to at least the first pixel group 11 and the second pixel group 12 is effectively guaranteed along the direction perpendicular to the printing, thereby improving the utilization rate of the printing nozzle, reducing the inkjet printing time, and being suitable for printing the first sub-pixel 101 and the second sub-pixel 102 with a smaller size, thereby improving the pixel resolution. On the other hand, since the first pixel group 11 and the second pixel group 12 are located in the first pixel row 21 and are arranged alternately, when the first pixel group 11, the second pixel group 12 or the third pixel group 13 prints incorrectly, it will not affect a large range of pixel areas, thereby improving the product yield.

[0100] The display panel provided by the present application is introduced in detail above. Specific examples are used in this article to illustrate the principles and implementation methods of the present application. The description of the above embodiments is only used to help understand the method of the present application and its core idea. At the same time, for general technical personnel in this field, according to the idea of ​​the present application, there will be changes in the specific implementation method and application scope. In summary, the content of this specification should not be understood as a limitation on the present application.

Claims

1. A display panel, characterized in that: include: substrate; A plurality of pixel groups, wherein the plurality of pixel groups are arranged on the substrate, the pixel groups include a first pixel group, a second pixel group and a third pixel group, and the plurality of the first pixel groups and the plurality of the second pixel groups are alternately arranged along a second direction to form a first pixel row; A plurality of the third pixel groups are arranged along the second direction to form a second pixel row, and along the first direction, at least one second pixel row is arranged between every two adjacent first pixel rows, and the second direction intersects the first direction; The first pixel group includes at least two first sub-pixels arranged along the second direction, the second pixel group includes at least two second sub-pixels arranged along the second direction, and the third pixel group includes at least one third sub-pixel arranged along the second direction; In the first pixel group, a plurality of the first sub-pixels are arranged in two rows along the first direction, and the number of the first sub-pixels in each row is equal; in the second pixel group, a plurality of the second sub-pixels are arranged in two rows along the first direction, and the number of the second sub-pixels in each row is equal; in the third pixel group, a plurality of the third sub-pixels are arranged in a row along the first direction; Along the second direction, the display panel has a first end and a second end that are oppositely arranged, the first pixel group includes a first pixel structure, a second pixel structure and a third pixel structure, the first pixel structure extends along the first direction, the second pixel structure extends from the first pixel structure to the first end, the third pixel structure extends from the first pixel structure to the second end, the second pixel structure and the third pixel structure are located in different rows, and the second pixel group has the same structure as the first pixel group; Two second pixel rows are arranged between every two adjacent first pixel rows, and each of the third sub-pixels corresponds to one first sub-pixel and one second sub-pixel.

2. The display panel according to claim 1, characterized in that: In the first pixel group and the second pixel group, a plurality of the first sub-pixels and a plurality of the second sub-pixels are arranged axially symmetrically, and the first pixel group and the second pixel group are arranged alternately along the first direction.

3. The display panel according to claim 1, characterized in that: In the first pixel group and the second pixel group, a plurality of the first sub-pixels and a plurality of the second sub-pixels are arranged axially symmetrically, and along the second direction, the first pixel group and the second pixel group are located in different columns.

4. The display panel according to claim 1, characterized in that: The first pixel structure includes two first sub-pixels arranged along the first direction, the second pixel structure and the third pixel structure each include one first sub-pixel, and the third pixel group includes two third sub-pixels.

5. The display panel according to claim 1, characterized in that: Along the first direction, in every four adjacent pixel rows, two of the second pixel rows are arranged between two of the first pixel rows; Among them, the first sub-pixel is one of a red sub-pixel and a green sub-pixel, the second sub-pixel is the other of the red sub-pixel and the green sub-pixel, the third sub-pixel is a blue sub-pixel, and one adjacent first sub-pixel, one adjacent second sub-pixel and two adjacent third sub-pixels constitute a pixel unit.

6. The display panel according to claim 5, characterized in that: Along the first direction, the first pixel groups located in two adjacent first pixel rows are arranged in a one-to-one correspondence or in an alternating arrangement.

7. The display panel according to claim 1, characterized in that: The display panel further includes a first retaining wall and a second retaining wall; The first retaining wall is arranged on the substrate and located in the gap between adjacent sub-pixels in the same pixel group. The second retaining wall is arranged on the substrate and located in the gap between adjacent pixel groups. The height of the first retaining wall is smaller than the height of the second retaining wall.

8. The display panel according to claim 7, characterized in that: The first blocking wall is also located between adjacent pixel groups, and the second blocking wall at least covers a portion of the first blocking wall.

9. The display panel according to claim 7, characterized in that: The display panel further includes a plurality of anodes, a plurality of light-emitting layers and a cathode; A plurality of anodes are arranged on the substrate at intervals. In each pixel group, a first retaining wall is provided between two adjacent anodes. Each light-emitting layer is provided on a side of the corresponding anode away from the substrate. The cathode is provided on a side of the light-emitting layer away from the substrate and covers the first retaining wall, the second retaining wall and the light-emitting layer.

Images