Display panel, method for manufacturing display panel, and display device

Abstract

The present invention discloses a display panel, a method for preparing a display panel, and a display device. The display panel includes: a substrate; a plurality of retaining wall structures, located on a first side of the substrate, the retaining wall structures forming an opening; a plurality of light-emitting elements, located on the first side of the substrate and corresponding to the opening; a color conversion layer, located in the opening and at least part of the color conversion layer is located on the side of the light-emitting element away from the substrate; a protruding structure, located in the opening and on the side wall of the retaining wall structure, the protruding structure is in contact with the color conversion layer. By arranging the protruding structure on the retaining wall structure, the protruding structure is in contact with the color conversion layer, the presence of the protruding structure affects the surface tension of the color conversion layer, affects the surface shape of the color conversion layer close to the light-emitting side of the light-emitting element, improves the conversion rate of the color conversion layer to the light emitted by the light-emitting element, and ensures the display effect of the display panel.

Description

Technical Field

[0001] The present invention relates to the technical field of display panels, and in particular to a display panel, a method for preparing a display panel, and a display device. Background Art

[0002] Quantum Dot Colour Filter (QDCF) has the technical characteristics of high color gamut and wide viewing angle. It can show excellent image quality when matched with Mini LED (Light-Emitting Diode), Micro LED or OLED (Organic Light-Emitting Diode) light-emitting elements, and is the most competitive product in future display technology. However, due to defects in the existing QDCF manufacturing process, the morphology of QDCF seriously affects the color conversion effect of the light emitted by the light-emitting element, thereby affecting the display effect of the display panel. Summary of the invention

[0003] The present invention provides a display panel, a method for preparing the display panel and a display device, which improve the conversion rate of a color conversion layer and ensure the display effect of the display panel.

[0004] In a first aspect, an embodiment of the present invention provides a display panel, including:

[0005] substrate substrate;

[0006] A plurality of retaining wall structures are located on the first side of the substrate, and the retaining wall structures form an opening;

[0007] A plurality of light emitting elements are located on the first side of the base substrate and correspond to the opening;

[0008] A color conversion layer is located in the opening and at least a portion of the color conversion layer is located on a side of the light emitting element away from the base substrate;

[0009] The protruding structure is located in the opening and on the side wall of the retaining wall structure, and the protruding structure is in contact with the color conversion layer.

[0010] In a second aspect, an embodiment of the present invention provides a method for manufacturing a display panel, which is applied to the display panel described in any one of the first aspects, and the method includes:

[0011] providing a substrate base plate;

[0012] Prepare and form a plurality of retaining wall structures, wherein the retaining wall structures include protruding structures, the retaining wall structures are located on the first side of the substrate, the retaining wall structures form openings, and the protruding structures are located in the openings;

[0013] Disposing a plurality of light emitting elements, wherein the light emitting elements are located on the first side of the base substrate, and the light emitting elements correspond to the openings;

[0014] A color conversion layer is prepared. The color conversion layer is located on a side of the light emitting element away from the base substrate. The color conversion layer is located in the opening. The color conversion layer is in contact with the protruding structure.

[0015] In a third aspect, an embodiment of the present invention provides a display device, comprising the display panel described in any one of the first aspects.

[0016] The technical solution of the embodiment of the present invention provides a display panel including: a substrate; a plurality of retaining wall structures, located on the first side of the substrate, the retaining wall structures forming an opening; a plurality of light-emitting elements, located on the first side of the substrate and corresponding to the opening; a color conversion layer, located in the opening and at least part of the color conversion layer is located on the side of the light-emitting element away from the substrate; a protruding structure, located in the opening and on the side wall of the retaining wall structure, the protruding structure is in contact with the color conversion layer. By arranging the protruding structure on the retaining wall structure, the protruding structure is in contact with the color conversion layer, the existence of the protruding structure affects the surface tension of the color conversion layer, affects the surface shape of the color conversion layer close to the light-emitting side of the light-emitting element, improves the conversion rate of the color conversion layer to the light emitted by the light-emitting element, and ensures the display effect of the display panel.

[0017] It should be understood that the contents described in this section are not intended to identify the key or important features of the embodiments of the present invention, nor are they intended to limit the scope of the present invention. Other features of the present invention will become easily understood through the following description. BRIEF DESCRIPTION OF THE DRAWINGS

[0018] In order to more clearly illustrate the technical solutions in the embodiments of the present invention, the following briefly introduces the drawings required for use in the description of the embodiments. Obviously, the drawings described below are only some embodiments of the present invention. For ordinary technicians in this field, other drawings can be obtained based on these drawings without creative work.

[0019] Figure 1 It is a structural schematic diagram of a display panel in the prior art;

[0020] Figure 2 A schematic diagram of the structure of a display panel provided by an embodiment of the present invention;

[0021] Figure 3 A schematic diagram of the structure of another display panel provided by an embodiment of the present invention;

[0022] Figure 4 A schematic diagram of the structure of another display panel provided by an embodiment of the present invention;

[0023] Figure 5 A schematic diagram of the structure of another display panel provided by an embodiment of the present invention;

[0024] Figure 6 A schematic diagram of the structure of another display panel provided by an embodiment of the present invention;

[0025] Figure 7 A schematic diagram of the structure of another display panel provided by an embodiment of the present invention;

[0026] Figure 8 A schematic diagram of the structure of another display panel provided by an embodiment of the present invention;

[0027] Fig. 9 A schematic diagram of the structure of another display panel provided by an embodiment of the present invention;

[0028] Fig.10 A schematic diagram of the structure of another display panel provided by an embodiment of the present invention;

[0029] Fig.11 A schematic diagram of a top view of a protrusion structure provided by an embodiment of the present invention;

[0030] Fig.12 A schematic diagram of a top view of another protrusion structure provided by an embodiment of the present invention;

[0031] Fig.13 A schematic diagram of the structure of another display panel provided by an embodiment of the present invention;

[0032] Fig.14 A schematic diagram of the structure of another display panel provided by an embodiment of the present invention;

[0033] Fig.15 A schematic diagram of the structure of another display panel provided by an embodiment of the present invention;

[0034] Fig.16 A schematic diagram of the structure of another display panel provided by an embodiment of the present invention;

[0035] Fig.17 A schematic diagram of the structure of another display panel provided by an embodiment of the present invention;

[0036] Fig.18 A method for preparing a display panel provided in an embodiment of the present invention;

[0037] Fig.19 Another method for preparing a display panel provided by an embodiment of the present invention;

[0038] Fig. 20 Another method for preparing a display panel provided by an embodiment of the present invention;

[0039] Fig.21 A schematic structural diagram of a display device provided by an embodiment of the present invention. DETAILED DESCRIPTION

[0040] In order to enable those skilled in the art to better understand the scheme of the present invention, the technical scheme in the embodiments of the present invention will be clearly and completely described below in conjunction with the drawings in the embodiments of the present invention. Obviously, the described embodiments are only part of the embodiments of the present invention, not all of the embodiments. Based on the embodiments of the present invention, all other embodiments obtained by ordinary technicians in this field without creative work should fall within the scope of protection of the present invention.

[0041] It should be noted that the terms "first", "second", etc. in the specification and claims of the present invention and the above-mentioned drawings are used to distinguish similar objects, and are not necessarily used to describe a specific order or sequence. It should be understood that the data used in this way can be interchanged where appropriate, so that the embodiments of the present invention described herein can be implemented in an order other than those illustrated or described herein. In addition, the terms "including" and "having" and any variations thereof are intended to cover non-exclusive inclusions, for example, a process, method, system, product or device that includes a series of steps or units is not necessarily limited to those steps or units that are clearly listed, but may include other steps or units that are not clearly listed or inherent to these processes, methods, products or devices.

[0042] Figure 1 This is a structural schematic diagram of a display panel in the prior art. The display panel 10 includes a base substrate 11, a plurality of retaining wall structures 12 located on one side of the base substrate 11, and a plurality of light-emitting elements 13. The retaining wall structure 13 forms an opening 14. The light-emitting element 13 is arranged in the opening 14. The color conversion layer 15 is located on the light-emitting side of the light-emitting element 13. The color conversion layer 15 includes a first surface 16 close to the side of the light-emitting element 13. The inventors have found that the color conversion layer 15 is in a liquid state before solidification. Due to the surface tension of the liquid, after the color conversion layer 15 is solidified, the first surface 16 will bulge toward the side away from the light-emitting element 13. The average thickness of the central area of ​​the color conversion layer 15 is less than the average thickness of the edge area of ​​the color conversion layer 15. The light emitted by the light-emitting element 13 is mainly concentrated in the central area of ​​the color conversion layer 15. When the light emitted by the light-emitting element 13 is blue light and the color conversion layer 15 is a green color conversion layer, the thickness of the central area of ​​the color conversion layer 15 is not enough. Since there is a wavelength region similar to the blue light wavelength range and the green light wavelength range, part of the blue light will leak, which reduces the conversion rate of the color conversion layer 15 to the light emitted by the light-emitting element 13, seriously affecting the display effect of the display panel.

[0043] In order to solve the above technical problems, an embodiment of the present invention provides a display panel, which includes: a substrate; a plurality of retaining wall structures, which are located on the first side of the substrate, and the retaining wall structures form an opening; a plurality of light-emitting elements, which are located on the first side of the substrate and correspond to the opening; a color conversion layer, which is located in the opening and at least part of the color conversion layer is located on the side of the light-emitting element away from the substrate; a protruding structure, which is located in the opening and on the side wall of the retaining wall structure, and the protruding structure is in contact with the color conversion layer. By forming the protruding structure on the side wall of the retaining wall structure, the existence of the protruding structure affects the surface tension of the color conversion layer, affects the surface shape of the color conversion layer close to the light-emitting side of the light-emitting element, increases the thickness of the central area of ​​the color conversion layer, increases the conversion rate of the color conversion layer to the light emitted by the light-emitting element, and ensures the display effect of the display panel.

[0044] The above is the core idea of ​​the present invention. The technical scheme in the embodiments of the present invention will be clearly and completely described below in conjunction with the drawings in the embodiments of the present invention. Based on the embodiments of the present invention, all other embodiments obtained by ordinary technicians in this field without creative work are within the scope of protection of the present invention.

[0045] Figure 2 A schematic diagram of the structure of a display panel provided by an embodiment of the present invention is shown in FIG. Figure 2 As shown, the display panel 100 includes: a base substrate 101; a plurality of retaining wall structures 102, which are located on a first side of the base substrate 101, and the retaining wall structures 102 form an opening 103; a plurality of light-emitting elements 104, which are located on the first side of the base substrate 101 and correspond to the opening 103; a color conversion layer 105, which is located in the opening 103 and at least a portion of the color conversion layer 105 is located on a side of the light-emitting element 104 away from the base substrate 101; and a protruding structure 106, which is located in the opening 103 and on a side wall 1021 of the retaining wall structure 102, and the protruding structure 106 is in contact with the color conversion layer 105.

[0046] Among them, the substrate 101 can be a flexible substrate or a rigid substrate, and the material selection of the substrate can be selected according to actual design requirements, and the embodiment of the present invention does not make specific limitations. A driving circuit is provided in the substrate 101, which is used to drive the light-emitting element 104 located on the first side of the substrate 101 to emit light. The first side of the substrate 101 is the light-emitting side of the display panel 100. A plurality of retaining wall structures 102 are provided on the first side of the substrate 101, and adjacent retaining wall structures 102 form openings 103. Light-emitting elements 104 are correspondingly provided in the openings 103. The existence of the retaining wall structure 102 can avoid optical crosstalk between adjacent light-emitting elements 104. At the same time, during the preparation of the retaining wall structure 102, by adjusting the preparation process of the retaining wall structure 102, a protruding structure 106 can be formed on the side wall 1021 of the retaining wall structure 102. The protruding structure 106 can be formed by subsequent etching after the film layer of the retaining wall structure 102 is deposited, or it can be formed integrally with the retaining wall structure during the film layer deposition process of the retaining wall structure 102. The specific formation method can be selected according to actual needs. A protruding structure 106 is set in each opening 103. The size and shape of the protruding structure 106 can be selected according to actual design requirements. The embodiment of the present invention does not make specific limitations. In the embodiment of the present invention, the cross-section of the protruding structure 106 is a triangle for example. The base of the triangle is the same as the extension direction of the side wall 1021 of the retaining wall structure 102, and the vertex of the triangle points to the central area of ​​the opening 103. The light-emitting elements 104 are all located on the first side of the base substrate 101. Each light-emitting element 104 corresponds to each opening 103. The light-emitting element 104 can be a blue light Micro LED or a blue light Mini LED. The light-emitting element 104 can be transferred to the side of the base substrate 101 after the preparation on the growth substrate side is completed, so that the cathode and anode on one side of the light-emitting element 104 are connected to the cathode and anode on the side of the base substrate 101 accordingly. The display panel 100 also includes a color conversion layer 105, which can be a quantum dot layer or a quantum dot layer plus scattering particles, so that the color conversion layer 105 converts the light emitted by the light-emitting element 104. The color conversion layer 105 is located in the opening 103. Along the thickness direction of the display panel 100, the color conversion layer 105 overlaps with the light-emitting element 104. When the light emitted by the light-emitting element 104 is blue light, the color conversion layer is a red quantum dot layer, and the light emitted by the color conversion layer 105 is red light; when the light emitted by the light-emitting element 104 is blue light, the color conversion layer 105 is a green quantum dot layer, and the light emitted by the color conversion layer 105 is green light. By setting color conversion layers 105 of different colors in the display panel 100, color display of the display panel 100 can be achieved.The display panel 100 may further include a color resist layer 1001, which is located on the side of the color conversion layer 105 away from the base substrate 101. The color of the color conversion layer 105 corresponds to the color of the color resist layer 1001, so as to ensure that the color resist layer 1001 filters the light emitted from the color conversion layer 105, and ensure the color purity of the light emitted from the display panel 100. At least part of the color conversion layer 105 is located on the side of the light emitting element 104 away from the base substrate 101, and the color conversion layer 105 may be completely located on the side of the light emitting element 104 away from the base substrate 101 or part of the color conversion layer 105 is located on the side of the light emitting element 104 away from the base substrate 101, and part of the color conversion layer 105 surrounds the light emitting element 104. However, due to the presence of the raised structure 106, there is partial contact between the raised structure 106 and the color conversion layer 105, so that the raised structure 106 adjusts the surface tension of the contact surface of the liquid color conversion layer material in contact with it, so that the thickness of the central area of ​​the color conversion layer 105 is greater than the thickness of the edge area of ​​the color conversion layer 105, thereby ensuring the conversion rate of the color conversion layer 105 for the light emitted by the light-emitting element 104, thereby reducing the risk of light leakage caused by the light emitted by the light-emitting element 104 being directly emitted without being converted by the color conversion layer 105, thereby ensuring the normal display effect of the display panel 100.

[0047] In the embodiment of the present invention, a protruding structure is formed on the side wall of the retaining wall structure. The existence of the protruding structure affects the surface tension of the color conversion layer, thereby affecting the surface shape of the color conversion layer close to the light emitting side of the light emitting element, thereby increasing the thickness of the central area of ​​the color conversion layer, and increasing the conversion rate of the color conversion layer to the light emitted by the light emitting element, thereby ensuring the display effect of the display panel.

[0048] Optional, continue to refer to Figure 2 The color conversion layer 105 includes a first color conversion section 1051 and a second color conversion section 1052, and the second color conversion section 1052 is arranged around the first color conversion section 1051; along a first direction (X direction in the figure), the average thickness of the first color conversion section 1051 is greater than the average thickness of the second color conversion section 1052; wherein the first direction X is the thickness direction of the display panel 100.

[0049] The color conversion layer 105 includes a first color conversion sub-section 1051 and a second color conversion sub-section 1052. The second color conversion sub-section 1052 is arranged around the first color conversion sub-section 1051. The first color conversion sub-section 1051 is the central area of ​​the color conversion layer 105. Along the first direction X, the average thickness of the first color conversion sub-section 1051 is greater than the average thickness of the second color conversion sub-section 1052. Since the light emitted by the light-emitting element 104 is concentrated in the central area, along the first direction X, the first color conversion sub-section 1051 overlaps with the projection of the light-emitting element 104, so that the light emitted by the light-emitting element 104 can be received by the first color conversion sub-section 1051 to a large extent, thereby increasing the propagation path of the light emitted by the light-emitting element 104 in the color conversion layer 105, ensuring the conversion rate of the color conversion layer 105 to the emitted light, and ensuring the display effect of the display panel 100.

[0050] Optional, continue to refer to Figure 2 The color conversion layer 105 includes a first surface 107 close to the base substrate 101 . Along the first direction X, the first surface 107 protrudes toward the base substrate 101 .

[0051] Among them, illustratively, the color conversion layer 105 is completely located on the side of the light-emitting element 104 away from the base substrate 101, and the color conversion layer 105 includes a first surface 107 close to the side of the base substrate 101. Along the first direction X, the first surface 107 protrudes toward the base substrate 101, that is, the average thickness of the first color conversion section 1051 in the color conversion layer 105 is greater than the average thickness of the second color conversion section 1052 in the color conversion layer. Along the first direction X, the first color conversion section 1051 of the color conversion layer 105 overlaps with the light-emitting element 104, ensuring that the color conversion layer 105 can convert the light emitted by the light-emitting element 104, thereby improving the conversion rate and ensuring the display effect of the display panel 100.

[0052] Optionally, the protruding structure 106 includes a vertex A, and along the first direction X, a distance H1 between the vertex A and the base substrate 101 is greater than a minimum distance H2 between the first surface 107 and the base substrate 101 .

[0053] The protruding structure 106 includes a vertex A, exemplarily as Figure XAs shown, the cross-section of the protruding structure 106 is a triangle, and the vertex A of the protruding structure 106 is the intersection of the two sides corresponding to the vertex angle in the triangle along the direction parallel to the plane where the base substrate 101 is located. At the same time, the base of the triangle is parallel to the side wall 1021 of the retaining wall structure 102. Along the first direction X, the shape of the color conversion layer 105 is adjusted by the arrangement of the protruding structure 106, so that the first surface 107 of the color conversion layer 105 is protruded toward the side of the base substrate 101, so that the distance H1 between the vertex A and the base substrate 101 is greater than the minimum distance H2 between the first surface 107 and the base substrate 101, thereby ensuring the protrusion degree of the color conversion layer 105, thereby improving the conversion rate of the color conversion layer 105 to the light emitted by the light-emitting element 104.

[0054] Optional, Figure 3 A schematic diagram of the structure of another display panel provided by an embodiment of the present invention is shown in FIG. Figure 3 As shown, the color conversion layer 105 includes a second surface 108 away from the base substrate 101, and the retaining wall structure 102 includes a third surface 109 away from the base substrate 101; along the first direction X, the distance H3 between the second surface 108 and the base substrate 101 is greater than or equal to the distance H4 between the third surface 109 and the base substrate 101.

[0055] The color conversion layer 105 includes a second surface 108 away from the base substrate 101, and the second surface 108 may be a plane. The retaining wall structure 102 includes a third surface 109 away from the base substrate 101. Figure 2 As shown, along the first direction X, the distance H3 between the second surface 108 and the base substrate 101 is equal to the distance H4 between the third surface 109 and the base substrate 101; or Figure 3 As shown, along the first direction X, the distance H3 between the second surface 108 and the base substrate 101 is greater than the distance H4 between the third surface 109 and the base substrate 101; this can effectively avoid the situation in which, during the preparation process of the display panel 100, the amount of the color conversion layer 105 dripped is small, and the protruding structure 106 is formed in the central area of ​​the side wall 1021 of the retaining wall structure 106, so that the central area of ​​the color conversion layer 105 is close to the light-emitting element 104, and when the retaining wall structure 102 is subsequently transferred to the side of the base substrate 101, when the color conversion layer 105 contacts the light-emitting element 104, there is a gap between the retaining wall structure 102 and the base substrate 101, causing optical crosstalk between adjacent light-emitting elements 104, thereby affecting the display effect of the display panel 100.

[0056] Optional, Figure 4 A schematic diagram of the structure of another display panel provided by an embodiment of the present invention is shown in FIG. Figure 4As shown, along the first direction X, the minimum distance H2 between the first surface 107 and the base substrate 101 is greater than or equal to the height H5 of the light emitting element 104 .

[0057] Among them, Figure 4 As shown, along the first direction X, the minimum distance H2 between the first surface 107 and the base substrate 101 is equal to the height H5 of the light emitting element 104. At this time, the highest point corresponding to the maximum thickness of the color conversion layer 105 contacts the light emitting surface of the light emitting element 104; Figure 1 As shown, along the first direction X, the minimum distance H2 between the first surface 107 and the base substrate 101 is greater than the height H5 of the light-emitting element 104. At this time, the highest point corresponding to the maximum thickness in the color conversion layer 105 does not contact the light-emitting surface of the light-emitting element 104. The structure of the above-mentioned display panel 100 can ensure that the light emitted by the light-emitting element 104 can be received by the first color conversion portion 1051 of the color conversion layer 105 as much as possible, increase the propagation path of the emitted light in the color conversion layer 105, and ensure the conversion rate of the color conversion layer 105 to the emitted light.

[0058] Optional, Figure 5 A schematic diagram of the structure of another display panel provided by an embodiment of the present invention is shown in FIG. Figure 5 As shown, the protruding structure 106 includes a first protruding side wall 110 and a second protruding side wall 111, and the first protruding side wall 110 is located on the side of the second protruding side wall 111 away from the base substrate 101; the angle between the first protruding side wall 110 and the side wall 1021 of the retaining wall structure 102 is a first bottom angle θ1, and the first bottom angle θ1 is toward the side of the second protruding side wall 111; the angle between the second protruding side wall 111 and the side wall 1021 is a second bottom angle θ2, and the second bottom angle θ2 is toward the side of the first protruding side wall 110; the second bottom angle θ2 is greater than or equal to the first bottom angle θ1.

[0059] In which, for example, the cross-section of the protruding structure 106 is a triangular structure as an example for display, the protruding structure 106 includes a first protruding side wall 110 and a second protruding side wall 111, and the protruding structure 106 also includes a bottom edge connected to the first protruding side wall 110 and the second protruding side wall 111 respectively. Since the protruding structure 106 is located on the retaining wall structure 102, the protruding structure 106 and the retaining wall structure 102 are an integrated structure, and the bottom edge coincides with the side wall 1021 of the retaining wall structure 102, and the bottom edge is The extending directions of the first protruding sidewall 110 and the sidewall 1021 are parallel to the first direction X, and the first protruding sidewall 110 is located on the side of the second protruding sidewall 111 away from the substrate 101; the angle between the first protruding sidewall 110 and the sidewall 1021 of the retaining wall structure 102 is the first bottom angle θ1, and the angle between the second protruding sidewall 111 and the sidewall 1021 is the second bottom angle θ2, the first bottom angle θ1 is toward the side of the second protruding sidewall 111, and the second bottom angle θ2 is toward the side of the first protruding sidewall 110, as shown in FIG. Figure 2 As shown, the second base angle θ2 can be controlled to be equal to the first base angle θ1; or, further, as Figure 5 As shown, the second bottom angle θ2 can be controlled to be greater than the first bottom angle θ1, so that the vertex A of the protruding structure 106 faces the light-emitting element 104. At this time, according to the shape of the protruding structure 106, the influence of the protruding structure 106 on the surface tension of the first surface 107 of the color conversion layer 105 is increased, so that the first surface 107 is more protruded toward the light-emitting element 104, thereby making the maximum thickness of the color conversion layer 105 when the second bottom angle θ2 is greater than the first bottom angle θ1 greater than the maximum thickness of the color conversion layer 105 when the second bottom angle θ2 is equal to the first bottom angle θ1, thereby improving the conversion rate of the color conversion layer to the light emitted by the light-emitting element 104, thereby ensuring the display effect of the display panel 100.

[0060] Optional, Figure 6 A schematic diagram of the structure of another display panel provided by an embodiment of the present invention is shown in FIG. Figure 6 As shown, the color conversion layer 105 covers the light emitting element 104; the color conversion layer 105 includes a fourth surface 112 away from the base substrate 101, and along the first direction X, the fourth surface 112 protrudes toward the side away from the base substrate 101; wherein the first direction X is the thickness direction of the display panel 100.

[0061] Among them, according to the different manufacturing processes of the display panel 100, the retaining wall structure 102 is manufactured on one side of the base substrate 101. By controlling the dripping amount of the color conversion layer material, the color conversion layer 105 can cover the light emitting element 104. Then, by setting the protruding structure 106, the surface tension of the fourth surface 112 of the color conversion layer 105 away from the base substrate 101 is affected. Along the first direction X, the fourth surface 112 is protruded toward the side away from the base substrate 101, ensuring that the average thickness of the first color conversion section 1051 of the color conversion layer 105 is greater than the average thickness of the second color conversion section 1052 of the color conversion layer 105. Along the first direction X, the first color conversion section 1051 of the color conversion layer 105 overlaps with the light emitting element 104, ensuring that the color conversion layer 105 can convert the light emitted by the light emitting element 104, thereby improving the conversion rate of the color conversion layer 105 and ensuring the display effect of the display panel 100.

[0062] Optional, continue to refer to Figure 6 The protruding structure 106 includes a vertex A. Along the first direction X, a distance H1 between the vertex A and the base substrate 101 is smaller than a maximum distance H6 between the fourth surface 112 and the base substrate 101 .

[0063] The protruding structure 106 includes a vertex A, exemplarily as Figure XAs shown, the raised structure 106 is a triangle, and the vertex A of the raised structure 106 is the intersection of two sides corresponding to the vertex angle in the triangle along a direction parallel to the plane where the base substrate 101 is located. At the same time, the base of the triangle is parallel to the side wall 1021 of the retaining wall structure 102. Along the first direction X, through the arrangement of the raised structure 106, the shape of the color conversion layer 105 is adjusted, so that the fourth surface 112 of the color conversion layer 105 is raised toward the side away from the base substrate 101, so that the distance H1 between the vertex A and the base substrate 101 is less than the maximum distance H6 between the fourth surface 112 and the base substrate 101, so as to ensure the protrusion degree of the color conversion layer 105 and ensure that the first color conversion portion 1051 of the color conversion layer 105 has a certain thickness, so as to improve the conversion rate of the color conversion layer 105 to the light emitted by the light-emitting element 104, and ensure the display effect of the display panel 100.

[0064] Optional, Figure 7 A schematic diagram of the structure of another display panel provided by an embodiment of the present invention is shown in FIG. Figure 7 As shown, the retaining wall structure 102 includes a fifth surface 113 away from the base substrate 101 ; along the first direction X, a distance H7 between the fifth surface 113 and the base substrate 101 is greater than or equal to a maximum distance H6 between the fourth surface 112 and the base substrate 101 .

[0065] The color conversion layer 105 includes a fourth surface 112 away from the base substrate 101, and the retaining wall structure 102 includes a fifth surface 113 away from the base substrate 101. The fifth surface 113 may be a plane. Figure 7 As shown, along the first direction X, the distance H7 between the fifth surface 113 and the base substrate 101 is equal to the maximum distance H6 between the fourth surface 112 and the base substrate 101; Figure 6 As shown, the distance H7 between the fifth surface 113 and the base substrate 101 is greater than the maximum distance H6 between the fourth surface 112 and the base substrate 101, which prevents the color conversion layer 105 from being too thick. As a result, during the preparation process of the display panel 100, the color conversion layer 105 is too thick, and a gap exists between the retaining wall structure 102 and the light shielding layer on the side of the retaining wall structure 102 away from the base substrate 101, causing optical crosstalk between adjacent light-emitting elements 104, thereby affecting the display effect of the display panel 100.

[0066] Optional, continue to refer to Figure 6 and Figure 7 Along the first direction X, a maximum distance H6 between the fourth surface 112 and the base substrate 101 is greater than a height H5 of the light emitting element 104 .

[0067] Among them, Figure 6 and Figure 7As shown, along the first direction X, the maximum distance H6 between the fourth surface 112 and the base substrate 101 is greater than the height H5 of the light-emitting element 104. At this time, the highest point corresponding to the maximum thickness in the color conversion layer 105 does not contact the light-emitting surface of the light-emitting element 104. The light emitted by the light-emitting element 104 can be converted by the color conversion layer 105 of a certain thickness, thereby increasing the propagation path of the emitted light in the color conversion layer 105 and ensuring the conversion rate of the color conversion layer 105 to the emitted light.

[0068] Optional, Figure 8 A schematic diagram of the structure of another display panel provided by an embodiment of the present invention is shown in FIG. Figure 8 As shown, the protruding structure 106 includes a third protruding side wall 1063 and a fourth protruding side wall 1064, the third protruding side wall 1063 is located on the side of the fourth protruding side wall 1064 away from the base substrate 101; the angle between the third protruding side wall 1063 and the side wall 1021 of the retaining wall structure 102 is a third bottom angle θ3, the third bottom angle θ3 is toward the side of the fourth protruding side wall 1064, the angle between the fourth protruding side wall 1064 and the side wall 1021 is a fourth bottom angle θ4, the fourth bottom angle θ4 is toward the side of the third protruding side wall 1063; the third bottom angle θ3 is greater than or equal to the fourth bottom angle θ4.

[0069] Among them, for example, the cross-section of the protruding structure 106 is a triangular structure as an example for display, the protruding structure 106 includes a third protruding side wall 1063 and a fourth protruding side wall 1064, and the protruding structure 106 also includes a bottom edge connected to the third protruding side wall 1063 and the fourth protruding side wall 1064 respectively, but because the protruding structure 106 is located on the retaining wall structure 102, the protruding structure 106 and the retaining wall structure 102 are an integrated structure, the bottom edge coincides with the side wall 1021 of the retaining wall structure 102, and the bottom edge is The extending directions of the third protruding side wall 1063 and the side wall 1021 are parallel to the first direction X, and the third protruding side wall 1063 is located on the side of the fourth protruding side wall 1064 away from the substrate 101; the angle between the third protruding side wall 1063 and the side wall 1021 of the retaining wall structure 102 is the third bottom angle θ3, and the angle between the fourth protruding side wall 1064 and the side wall 1021 is the fourth bottom angle θ4, the third bottom angle θ3 is toward the side of the fourth protruding side wall 1064, and the fourth bottom angle θ4 is toward the side of the third protruding side wall 1063, as shown in FIG. Figure 8 As shown, the third base angle θ3 can be controlled to be greater than the fourth base angle θ4; or, further, as Figure 6As shown, the third bottom angle θ3 can be controlled to be greater than the fourth bottom angle θ4, so that the vertex A of the protruding structure 106 is away from the light-emitting element 104. At this time, according to the shape of the protruding structure 106, the influence of the protruding structure 106 on the surface tension of the fourth surface 112 of the color conversion layer 105 is increased, so that the fourth surface 112 is more protruded away from the light-emitting element 104, thereby making the maximum thickness of the color conversion layer 105 when the third bottom angle θ3 is greater than the fourth bottom angle θ4 greater than the maximum thickness of the color conversion layer 105 when the third bottom angle θ3 is equal to the fourth bottom angle θ4, thereby improving the conversion rate of the color conversion layer 105 to the light emitted by the light-emitting element 104, thereby ensuring the display effect of the display panel 100.

[0070] Optional, Fig. 9 A schematic diagram of the structure of another display panel provided by an embodiment of the present invention is shown in FIG. Fig. 9 As shown, the retaining wall structure 102 includes a first retaining wall section 1022 and a second retaining wall section 1023 which are stacked in sequence along a first direction X, the second retaining wall section 1023 is located on the side of the first retaining wall section 1022 away from the base substrate 101, the first retaining wall section 1022 includes a first side wall 1024 parallel to the first direction X and a first surface 1025 close to the second retaining wall section 1023 and parallel to the plane where the base substrate 101 is located, the second retaining wall section 1023 includes a second side wall 1026 parallel to the first direction X and a second surface 1027 close to the second retaining wall section 1023 and parallel to the plane where the base substrate 101 is located, along the first direction X, the projection area of ​​the first surface 1025 is smaller than the projection area of ​​the second surface 1027, and the protruding structure 106 is located at the junction of the first retaining wall section 1022 and the second retaining wall section 1023. Optionally, the second side wall 1026 and at least a portion of the second surface 1027 form a protruding structure 106 , wherein the first direction X is a thickness direction of the display panel.

[0071] Among them, the retaining wall structure includes a first retaining wall section 1022 and a second retaining wall section 1023 stacked in sequence along a first direction X, the second retaining wall section 1023 is located on the side of the first retaining wall section 1022 away from the base substrate 101, the first retaining wall section 1022 and the second retaining wall section 1023 are an integrated structure, which can be achieved by step-by-step production during the production process, the first retaining wall section 1022 includes a first side wall 1024 parallel to the first direction X and a first surface 1025 close to the second retaining wall section 1023 and parallel to the plane where the base substrate 101 is located, the first retaining wall section 1022 forms a first sub-opening 1033, the second retaining wall section 1023 includes a second side wall 1026 parallel to the first direction X and a second surface 1027 close to the second retaining wall section 1023 and parallel to the plane where the base substrate 101 is located, the first retaining wall section 1022 forms a first sub-opening 1033, the second retaining wall section 1023 includes a second side wall 1026 parallel to the first direction X and a second surface 1027 close to the second retaining wall section 1023 and parallel to the plane where the base substrate 101 is located, The second retaining wall section 1023 forms a second sub-opening 1034. Along the first direction X, the projection area of ​​the first surface 1025 is smaller than the projection area of ​​the second surface 1027. The projection of the first surface 1025 falls within the projection range of the first surface 1027, so that a step is formed at the junction of the first retaining wall section 1022 and the second retaining wall section 1023. The second side wall 1026 and the portion of the second surface 1027 that is in contact with the first surface 1025 form a protruding structure 106. The protruding structure 106 is in contact with the color conversion layer 105. The existence of the protruding structure 106 affects the surface tension of the color conversion layer 105, and further affects the surface shape of the color conversion layer 105 close to the light emitting side of the light emitting element 104, thereby increasing the thickness of the central area of ​​the color conversion layer 105, and increasing the conversion rate of the color conversion layer to the light emitted by the light emitting element 104, thereby ensuring the display effect of the display panel 100.

[0072] Optional, Fig.10 A schematic diagram of the structure of another display panel provided by an embodiment of the present invention is shown in FIG. Fig.10 As shown, along the first direction X, the protruding structure 106 does not overlap or partially overlaps with the light emitting element 104 ; wherein the first direction X is the thickness direction of the display panel 100 .

[0073] The protruding structure 106 and the light emitting element 104 do not overlap, or the protruding structure 106 and the light emitting element 104 partially overlap. The specific configuration can be selected according to actual design requirements, such as Figure 2 As shown, during the preparation process of the display panel 100, the retaining wall structure 102 and the protruding structure 106 located on the retaining wall structure 102 are first prepared on the first side of the base substrate 101, and then the light-emitting element 104 is arranged on the first side of the base substrate 101. At this time, in order to ensure that the light-emitting element 104 can be smoothly placed on one side of the base substrate 101 and electrically connected to the base substrate 101, it is necessary that the protruding structure 106 and the light-emitting element 104 do not overlap, so as to ensure the normal preparation of the display panel 100. Fig. 9As shown, a light-emitting element 104 is set on the first side of the base substrate 101, and then a retaining wall structure 102 with a protruding structure 106 is set on the first side of the base substrate 101. At this time, since the protruding structure 106 is prepared later than the light-emitting element 104, the protruding structure 106 may partially overlap with the edge of the light-emitting element 104. In order to ensure the normal display effect of the display panel 100, the protruding structure 106 and the light-emitting element 104 are not overlapped at all as much as possible to reduce the influence of the protruding structure 106 on the light output of the light-emitting element 104.

[0074] Optional, Fig.11 A schematic diagram of a top view of a protrusion structure provided by an embodiment of the present invention, Fig.12 A schematic diagram of a top view of another protrusion structure provided in an embodiment of the present invention is shown in FIG. Fig.11 and Fig.12 As shown, the protruding structure 106 is a continuous annular structure; or, the protruding structure 106 includes at least two protruding substructures 1065 .

[0075] Among them, Fig.11 As shown, the protruding structure 106 may be a continuous annular structure, ensuring that the protruding structure 106 can adjust the surface tension of the color conversion layer 105, so that the first color conversion portion 1051 of the color conversion layer 105 is evenly distributed and located at a position corresponding to the light emitting center of the light emitting element 104, ensuring the color conversion layer 105 has a conversion effect on the light emitted by the light emitting element 104; or, according to the needs of actual design requirements, the protruding structure 106 may include at least three protruding substructures 1065, exemplarily as Fig.12 As shown, the protruding structure 106 includes three protruding substructures 1065 , so that the protruding substructures 1065 work together to adjust the surface tension of the color conversion layer 105 , thereby ensuring that the color conversion layer 105 converts the light emitted by the light emitting element 104 and ensures the display effect of the display panel 100 .

[0076] Optional, continue to refer to Fig.12 The protruding structure 106 includes at least two protruding substructures 1065 , and the at least two protruding substructures 1065 are centrally symmetrically arranged about the center of the opening 103 .

[0077] Among them, in order to ensure that the first color conversion section 1051 of the color conversion layer 105 adjusted by the protruding structure 106 is as evenly distributed as possible and corresponds to the central light emitting area of ​​the light emitting element 104, it is ensured that the color conversion layer 105 converts the light emitted by the light emitting element 104 uniformly, thereby ensuring that the light emitted by the color conversion layer 105 is uniform, thereby ensuring the display effect of the display panel 100.

[0078] Optional, Fig.13A schematic diagram of the structure of another display panel provided by an embodiment of the present invention is shown in FIG. Fig.13 As shown, the color conversion layer 105 includes a first color conversion layer 114 and a second color conversion layer 115, the opening 103 includes a first opening 1031 and a second opening 1032, the protrusion structure 106 includes a first protrusion structure 116 and a second protrusion structure 117, the first protrusion structure 116 is located in the first opening 1031, and the second protrusion structure 117 is located in the second opening 1032, the first color conversion layer 114 is in contact with the first protrusion structure 116, and the second color conversion layer 115 is in contact with the second protrusion structure 117; the first color conversion layer 114 includes a first sub-color conversion portion 1141 and a second sub-color conversion portion 1142. The second sub-color conversion sub-portion 1142 is arranged around the first sub-color conversion sub-portion 1141; the second color conversion layer 115 includes a third sub-color conversion sub-portion 1151 and a fourth sub-color conversion sub-portion 1152, and the fourth sub-color conversion sub-portion 1152 is arranged around the third sub-color conversion sub-portion 1151; along the first direction X, the average thickness of the first sub-color conversion sub-portion 1141 is greater than the average thickness of the second sub-color conversion sub-portion 1142; the average thickness of the third sub-color conversion sub-portion 1151 is greater than the average thickness of the fourth sub-color conversion sub-portion 1152; wherein the first direction X is the thickness direction of the display panel 100.

[0079] Among them, when the display panel 100 performs color display, the color conversion layer 105 includes a first color conversion layer 114 and a second color conversion layer 115. The first color conversion layer 114 and the second color conversion layer 115 can be color conversion layers of different colors. Along the light emitting direction of the display panel, the first color conversion layer 114 is provided with a first color resist layer 1002 on the side away from the base substrate 1001, and the color of the first color conversion layer 114 corresponds to the color of the first color resist layer 1002; the second color conversion layer 115 is provided with a second color resist layer 1003 on the side away from the base substrate 1001, and the color of the second color conversion layer 115 corresponds to the color of the second color resist layer 1003, so as to ensure that the light emitted from the color conversion layer 105 is filtered by the first color resist layer 1002 and the second color resist layer 1003, thereby ensuring the color purity of the light emitted from the display panel 100, and further ensuring the display effect of the display panel 100. The opening 103 includes a first opening 1031 and a second opening 1032, the protrusion structure 106 includes a first protrusion structure 116 and a second protrusion structure 117, the first protrusion structure 116 is located in the first opening 1031, the first color conversion layer 114 is in contact with the first protrusion structure 116, the first color conversion layer 114 includes a first sub-color conversion section 1141 and a second sub-color conversion section 1142, along the first direction X, the average thickness of the first sub-color conversion section 1141 is greater than the average thickness of the second sub-color conversion section 1142, to ensure that the first color conversion layer 114 can convert the light emitted by the light emitting element 104, to ensure the conversion rate of the first color conversion layer 114; the second protrusion structure 117 is located in the second opening 1032, the second color conversion layer 115 is in contact with the second protrusion structure 117; the second sub-color conversion section 1141 is greater than ... The color conversion subsection 1142 is arranged around the first sub-color conversion subsection 1141; the second color conversion layer 115 includes a third sub-color conversion subsection 1151 and a fourth sub-color conversion subsection 1152, and the fourth sub-color conversion subsection 1152 is arranged around the third sub-color conversion subsection 1151; the average thickness of the third sub-color conversion subsection 1151 is greater than the average thickness of the fourth sub-color conversion subsection 1152, ensuring that the second color conversion layer 115 can convert the light emitted by the light-emitting element 104, ensuring the conversion rate of the second color conversion layer 115, adjusting the surface tension of the first color conversion layer 114 through the first protruding structure 116 and adjusting the surface tension of the second color conversion layer 115 through the second protruding structure 117, affecting the shapes of the first color conversion layer 114 and the second color conversion layer 115, thereby ensuring the overall display effect of the display panel 100.

[0080] Optional, Fig.14 A schematic diagram of the structure of another display panel provided by an embodiment of the present invention is shown in FIG. Fig.14As shown, the color conversion wavelength of the first color conversion layer 114 is greater than the color conversion wavelength of the second color conversion layer 115 , and both are greater than the wavelength of the emitted light of the light emitting element 104 ; the maximum thickness h1 of the first color conversion layer 114 is less than the maximum thickness h2 of the second color conversion layer 115 .

[0081] Among them, the color conversion wavelength of the first color conversion layer 114 is greater than the color conversion wavelength of the second color conversion layer 115, and both are greater than the wavelength of the emitted light of the light-emitting element 104. At this time, the first color conversion layer 114 is a red color conversion layer, the second color conversion layer 115 is a green color conversion layer, and the light-emitting element 104 is a blue light-emitting element. The blue display area 20 corresponding to the emitted blue light does not need to be provided with a blue color conversion layer. The blue light emitted by the light-emitting element 104 can meet the blue display requirements. In order to ensure the color purity of the emitted light, a third color resist layer 1004 can be provided on the side of the light-emitting element 104 away from the base substrate 101. The color of the emitted light of the blue light-emitting element corresponds to the color of the third color resist layer 1004. However, since there is a partial overlap between the green light wavelength range and the blue light wavelength range, the thinner the second color conversion layer 115 is, the more likely it is that part of the blue light emitted by the light emitting element 104 is directly emitted without being converted, causing blue light leakage. Therefore, the maximum thickness h1 of the first color conversion layer 114 is adjusted to be smaller than the maximum thickness h2 of the second color conversion layer 115, thereby increasing the conversion rate of the second color conversion layer 115 for the light emitted by the light emitting element 104, reducing the risk of blue light leakage, and ensuring the display effect of the display panel 100.

[0082] Optional, continue to refer to Fig.14 The first color conversion layer 114 and the second color conversion layer 115 are both located on the side of the light emitting element 104 away from the base substrate 101, the first color conversion layer 114 includes a sixth surface 118 close to the base substrate 101, and the second color conversion layer 115 includes a seventh surface 119 close to the base substrate 101; along the first direction X, the sixth surface 118 protrudes toward the base substrate 101, and the seventh surface 119 protrudes toward the base substrate 101; the first protruding structure 116 includes a first vertex A1, and the second protruding structure 117 includes a second vertex A2, and the distance h3 between the first vertex A1 and the base substrate 101 is greater than the distance h4 between the second vertex A2 and the base substrate 101.

[0083] Among them, the first color conversion layer 114 and the second color conversion layer 115 are both located on the side of the light-emitting element 104 away from the base substrate 101. Exemplarily, the first color conversion layer 114 and the second color conversion layer 115 are both spaced apart from the light-emitting element 104, and there is no contact for demonstration. The first color conversion layer includes a sixth surface 118 close to the side of the base substrate 101, and along the first direction X, the sixth surface 118 protrudes toward the base substrate 101; the second color conversion layer 115 includes a seventh surface 119 close to the side of the base substrate 101, and the seventh surface 119 protrudes toward the base substrate 101; the first protrusion structure 116 includes The first vertex A1 and the second protruding structure 117 include the second vertex A2. Since the first color conversion layer 114 and the second color conversion layer 115 convert different wavelengths respectively, when the shapes of the first protruding structure 116 and the second protruding structure 117 are the same, the distance h3 between the first vertex A1 and the base substrate 101 can be adjusted to be greater than the distance h4 between the second vertex A2 and the base substrate 101, thereby ensuring that the conversion rate of the second color conversion layer 115 is greater than the conversion rate of the first color conversion layer 114, reducing the probability of blue light leakage risk in the display area corresponding to the second color conversion layer 115, and ensuring the display effect of the display panel 100.

[0084] Optional, Fig.15 A schematic diagram of the structure of another display panel provided by an embodiment of the present invention is shown in FIG. Fig.15As shown, the first color conversion layer 114 and the second color conversion layer 115 are both located on the side of the light emitting element 104 away from the base substrate 101, the first color conversion layer 114 includes a sixth surface 118 close to the base substrate 101, and the second color conversion layer 115 includes a seventh surface 119 close to the base substrate 101; along the first direction X, the sixth surface 118 protrudes toward the base substrate 101, and the seventh surface 119 protrudes toward the base substrate 101; the first protruding structure 116 includes a fifth protruding side wall 1161 and a sixth protruding side wall 1162, and the fifth protruding side wall 1161 is located on the side of the sixth protruding side wall 1162 away from the base substrate 101; the angle between the fifth protruding side wall 1161 and the side wall 1021 of the retaining wall structure 102 is a fifth bottom angle θ5, and the fifth bottom angle θ5 is toward the sixth protruding side wall 1162. On one side, the angle between the sixth protrusion side wall 1162 and the side wall 1021 is the sixth bottom angle θ6, and the sixth bottom angle θ6 is toward the side of the fifth protrusion side wall 1161; the sixth bottom angle θ6 is greater than or equal to the fifth bottom angle θ5; the second protrusion structure 117 includes a seventh protrusion side wall 1171 and an eighth protrusion side wall 1172, and the seventh protrusion side wall 1171 is located on the side of the eighth protrusion side wall 1172 away from the base substrate 101; the angle between the seventh protrusion side wall 1171 and the side wall 1021 is the seventh bottom angle θ7, and the seventh bottom angle θ7 is toward the side of the eighth protrusion side wall 1172, the angle between the eighth protrusion side wall 1172 and the first direction X is the eighth bottom angle θ8, and the eighth bottom angle θ8 is toward the side of the seventh protrusion side wall 1171; the eighth bottom angle θ8 is greater than or equal to the seventh bottom angle θ7; the seventh bottom angle θ7 is less than the fifth bottom angle θ5.

[0085] The first color conversion layer 114 and the second color conversion layer 115 are both located on the side of the light emitting element 104 away from the base substrate 101, the first color conversion layer includes a sixth surface 118 close to the base substrate 101, along the first direction X, the sixth surface 118 protrudes toward the base substrate 101, the first protruding structure 116 includes a fifth protruding side wall 1161 and a sixth protruding side wall 1162, the fifth protruding side wall 1161 is located on the side of the sixth protruding side wall 1162 away from the base substrate 101, the angle between the fifth protruding side wall 1161 and the side wall 1021 of the retaining wall structure 102 is a fifth bottom angle θ5, and the fifth bottom angle θ5 is toward the sixth protruding side wall 116 2 side, the angle between the sixth protrusion side wall 1162 and the side wall 1021 is the sixth bottom angle θ6, the sixth bottom angle θ6 faces the fifth protrusion side wall 1161 side, and the sixth bottom angle θ6 is greater than or equal to the fifth bottom angle θ5; the sixth bottom angle θ6 can be controlled to be greater than the fifth bottom angle θ5, so that the vertex A of the first protrusion structure 116 faces the light-emitting element 104, and further when the sixth bottom angle θ6 is greater than the fifth bottom angle θ5, the maximum thickness of the color conversion layer 105 is greater than the maximum thickness of the color conversion layer 105 when the sixth bottom angle θ6 is equal to the fifth bottom angle θ5, thereby improving the conversion rate of the first color conversion layer to the light emitted by the light-emitting element 104, and ensuring the display effect of the display panel 100. The second color conversion layer 115 includes a seventh surface 119 close to the side of the base substrate 101, and the seventh surface 119 protrudes toward the base substrate 101; the second protrusion structure 117 includes a seventh protrusion sidewall 1171 and an eighth protrusion sidewall 1172, the seventh protrusion sidewall 1171 is located on the side of the eighth protrusion sidewall 1172 away from the base substrate 101, the angle between the seventh protrusion sidewall 1171 and the sidewall 1021 is a seventh bottom angle θ7, the seventh bottom angle θ7 is toward the side of the eighth protrusion sidewall 1172, and the angle between the eighth protrusion sidewall 1172 and the first direction X is the eighth bottom angle θ7. The eighth bottom angle θ8 faces the seventh protrusion side wall 1171, and the eighth bottom angle θ8 is greater than or equal to the seventh bottom angle θ7. The eighth bottom angle θ8 can be controlled to be greater than the seventh bottom angle θ7, so that the second vertex A2 of the second protrusion structure 117 faces the light-emitting element 104, and further when the eighth bottom angle θ8 is greater than the seventh bottom angle θ7, the maximum thickness of the color conversion layer 105 is greater than the maximum thickness of the color conversion layer 105 when the eighth bottom angle θ8 is equal to the seventh bottom angle θ7, thereby improving the conversion rate of the second color conversion layer to the light emitted by the light-emitting element 104, and ensuring the display effect of the display panel 100. Fig.14 In the example, the sixth bottom angle θ6 is equal to the fifth bottom angle θ5, and the eighth bottom angle θ8 is greater than the seventh bottom angle θ7. The seventh bottom angle θ7 is further adjusted to be smaller than the fifth bottom angle θ5 to ensure that the conversion rate of the second color conversion layer 115 is greater than the conversion rate of the first color conversion layer 114, thereby reducing the probability of blue light leakage risk in the display area corresponding to the second color conversion layer 115 and ensuring the display effect of the display panel 100.

[0086] Optional, Fig.16 A schematic diagram of the structure of another display panel provided by an embodiment of the present invention is shown in FIG. Fig.16 As shown, the first color conversion layer 114 and the second color conversion layer 115 both cover the light emitting element 104, the first color conversion layer 114 includes an eighth surface 120 away from the side of the base substrate 101, and the second color conversion layer 115 includes a ninth surface 121 away from the side of the base substrate 101; along the first direction X, the eighth surface 120 protrudes toward the side away from the base substrate 101, and the ninth surface 121 protrudes toward the side away from the base substrate 101; the first protruding structure 116 includes a third vertex A3, and the second protruding structure 117 includes a fourth vertex A4, and the distance h5 between the third vertex A3 and the base substrate 101 is less than the distance h6 between the fourth vertex A4 and the base substrate 101.

[0087] The first color conversion layer 114 and the second color conversion layer 115 both cover the light emitting element 104. The first color conversion layer 114 includes an eighth surface 120 away from the substrate 101. Along the first direction X, the eighth surface 120 bulges toward the side away from the substrate 101. The second color conversion layer 115 includes a ninth surface 121 away from the substrate 101. The ninth surface 121 bulges toward the side away from the substrate 101. The first convex structure 116 includes a third vertex A3, and the second convex structure 117 includes a fourth vertex A 4. Since the first color conversion layer 114 and the second color conversion layer 115 convert different wavelengths respectively, when the shapes of the first protruding structure 116 and the second protruding structure 117 are the same, the distance h5 between the third vertex A3 and the base substrate 101 can be adjusted to be smaller than the distance h6 between the fourth vertex A4 and the base substrate 101, thereby ensuring that the conversion rate of the second color conversion layer 115 is greater than the conversion rate of the first color conversion layer 114, reducing the probability of blue light leakage risk in the display area corresponding to the second color conversion layer 115, and ensuring the display effect of the display panel 100.

[0088] Optional, Fig.17 A schematic diagram of the structure of another display panel provided by an embodiment of the present invention is shown in FIG. Fig.17As shown, the first color conversion layer 114 and the second color conversion layer 115 both cover the light emitting element 104, the first color conversion layer 114 includes an eighth surface 120 away from the side of the base substrate 101, and the second color conversion layer 115 includes a ninth surface 121 away from the side of the base substrate 101; along the first direction X, the eighth surface 120 protrudes toward the side away from the base substrate 101, and the ninth surface 121 protrudes toward the side away from the base substrate 101; the first protruding structure 116 includes a ninth protruding side wall 1163 and a tenth protruding side wall 1164, and the ninth protruding side wall 1163 is located on the side of the tenth protruding side wall 1164 away from the base substrate 101; the angle between the ninth protruding side wall 1163 and the side wall 1021 of the retaining wall structure 102 is a ninth bottom angle θ9, and the ninth bottom angle θ9 is toward the side of the tenth protruding side wall 1164, and the tenth protruding side wall 1164 is at a position close to the tenth protruding side wall 1164. The angle between the side walls 1021 is the tenth bottom angle θ10, and the tenth bottom angle θ10 is toward the side of the ninth protruding side wall 1163; the ninth bottom angle θ9 is greater than or equal to the tenth bottom angle θ10; the second protruding structure 117 includes an eleventh protruding side wall 1173 and a twelfth protruding side wall 1174, and the eleventh protruding side wall 1173 is located on the side of the twelfth protruding side wall 1174 away from the base substrate 101; the angle between the eleventh protruding side wall 1173 and the side wall 1021 is the eleventh bottom angle θ11, and the eleventh bottom angle θ11 is toward the side of the twelfth protruding side wall 1174, and the angle between the twelfth protruding side wall 1174 and the side wall 1021 is the twelfth bottom angle θ12, and the twelfth bottom angle θ12 is toward the side of the eleventh protruding side wall 1173; the eleventh bottom angle θ11 is greater than or equal to the twelfth bottom angle θ12; the twelfth bottom angle θ12 is less than the tenth bottom angle θ10.

[0089] Among them, the first color conversion layer 114 and the second color conversion layer 115 both cover the light-emitting element 104, the first color conversion layer 114 includes an eighth surface 120 on the side away from the base substrate 101, and along the first direction X, the eighth surface 120 protrudes toward the side away from the base substrate 101, and the first protruding structure 116 includes a ninth protruding side wall 1163 and a tenth protruding side wall 1164, and the ninth protruding side wall 1163 is located on the side of the tenth protruding side wall 1164 away from the base substrate 101; the angle between the ninth protruding side wall 1163 and the side wall 1021 of the retaining wall structure 102 is a ninth bottom angle θ9, and the ninth bottom angle θ9 is toward the side of the tenth protruding side wall 1164, and the tenth protruding side wall 1164 is located on the side of the tenth protruding side wall 1164 away from the base substrate 101. The angle between the side wall 1164 and the side wall 1021 is the tenth bottom angle θ10, and the tenth bottom angle θ10 is toward the side of the ninth protruding side wall 1163; the ninth bottom angle θ9 is greater than or equal to the tenth bottom angle θ10; the ninth bottom angle θ9 can be controlled to be greater than the tenth bottom angle θ10, so that the vertex A of the first protruding structure 116 is toward the side away from the light-emitting element 104, and further when the ninth bottom angle θ9 is greater than the tenth bottom angle θ10, the maximum thickness of the color conversion layer 105 is greater than the maximum thickness of the color conversion layer 105 when the ninth bottom angle θ9 is equal to the tenth bottom angle θ10, thereby improving the conversion rate of the first color conversion layer to the light emitted by the light-emitting element 104, and ensuring the display effect of the display panel 100. The second color conversion layer 115 includes a ninth surface 121 away from the base substrate 101; the ninth surface 121 is protruded toward the side away from the base substrate 101; the second protrusion structure 117 includes an eleventh protrusion sidewall 1173 and a twelfth protrusion sidewall 1174, the eleventh protrusion sidewall 1173 is located on the side of the twelfth protrusion sidewall 1174 away from the base substrate 101; the angle between the eleventh protrusion sidewall 1173 and the sidewall 1021 is the eleventh bottom angle θ11, the eleventh bottom angle θ11 is toward the side of the twelfth protrusion sidewall 1174, and the angle between the twelfth protrusion sidewall 1174 and the sidewall 1021 is the twelfth bottom angle θ11 2. The twelfth bottom angle θ12 is toward the side of the eleventh protrusion side wall 1173; the eleventh bottom angle θ11 is greater than or equal to the twelfth bottom angle θ12; the eleventh bottom angle θ11 can be controlled to be greater than the twelfth bottom angle θ12, so that the sixth vertex A6 of the second protrusion structure 117 is toward the side away from the light-emitting element 104, and further when the eleventh bottom angle θ11 is greater than the twelfth bottom angle θ12, the maximum thickness of the color conversion layer 105 is greater than the maximum thickness of the color conversion layer 105 when the eleventh bottom angle θ11 is equal to the twelfth bottom angle θ12, thereby improving the conversion rate of the second color conversion layer to the light emitted by the light-emitting element 104, and ensuring the display effect of the display panel 100. Fig.16In the example, the ninth bottom angle θ9 is equal to the tenth bottom angle θ10, and the eleventh bottom angle θ11 is greater than the twelfth bottom angle θ12. The twelfth bottom angle θ12 is further adjusted to be smaller than the tenth bottom angle θ10, thereby ensuring that the conversion rate of the second color conversion layer 115 is greater than the conversion rate of the first color conversion layer 114, reducing the probability of blue light leakage risk in the display area corresponding to the second color conversion layer 115, and ensuring the display effect of the display panel 100.

[0090] Fig.18 A method for manufacturing a display panel provided in an embodiment of the present invention is applied to the display panel described in any one of the above embodiments, and the method comprises:

[0091] S101, providing a substrate.

[0092] S102, preparing and forming a plurality of retaining wall structures, the retaining wall structures comprising protruding structures, the retaining wall structures being located on a first side of the substrate, the retaining wall structures forming openings, and the protruding structures being located in the openings.

[0093] Wherein, a retaining wall structure material layer is arranged on one side of the base substrate or the growth substrate, and the retaining wall structure is exposed and developed multiple times to form a retaining wall structure with a protruding structure.

[0094] S103, providing a plurality of light emitting elements, wherein the light emitting elements are located on the first side of the substrate, and the light emitting elements correspond to the openings.

[0095] Among them, the light-emitting element can be a blue light Micro LED or a blue light Mini LED. After the light-emitting element is prepared, it can be transferred to one side of the substrate through a transfer device, so that the light-emitting element is electrically connected to the substrate to ensure the normal light emission of the subsequent light-emitting element.

[0096] S104, preparing a color conversion layer, the color conversion layer is located on a side of the light emitting element away from the substrate, the color conversion layer is located in the opening, and the color conversion layer is in contact with the protruding structure.

[0097] Among them, the color conversion layer component material is arranged on the side of the light-emitting element away from the substrate through an inkjet printing process. Since the color conversion layer is in contact with the protruding structure, the surface tension of the color conversion layer is affected by the setting of the protruding structure, and then the color conversion layer material is solidified to form a color conversion layer, so that the average thickness of the central area of ​​the color conversion layer is greater than the average thickness of the edge area of ​​the color conversion layer, thereby ensuring the conversion rate of the color conversion layer to the output light of the light-emitting element.

[0098] In the embodiment of the present invention, a protruding structure is formed on the side wall of the retaining wall structure. The existence of the protruding structure affects the surface tension of the color conversion layer, thereby affecting the surface shape of the color conversion layer close to the light emitting side of the light emitting element, adjusting the thickness of the central area of ​​the color conversion layer, and improving the conversion rate of the color conversion layer to the light emitted by the light emitting element, thereby ensuring the display effect of the display panel.

[0099] Fig.19 Another method for preparing a display panel provided by an embodiment of the present invention includes:

[0100] S201, providing a substrate.

[0101] S202, providing a growth substrate.

[0102] S203, preparing a retaining wall structure layer on one side of the growth substrate.

[0103] S204, performing a first exposure and development on the retaining wall structure layer to form a transition retaining wall structure layer, wherein the transition retaining wall structure layer includes a first transition retaining wall section and a second transition retaining wall section, wherein the second transition retaining wall section surrounds the first transition retaining wall section, and along a first direction, a maximum thickness of the first transition retaining wall section is less than a thickness of the second transition retaining wall section; wherein the first direction is a thickness direction of the display panel.

[0104] Among them, the retaining wall structure layer is exposed and developed for the first time to form a transition retaining wall structure layer, and a certain thickness of the retaining wall structure layer is developed away. Specifically, a specific preparation process can be selected according to the properties of the photoresist so that the surface of the transition retaining wall structure layer away from the side of the growth substrate forms a shape that is convex toward the side of the growth substrate, that is, the transition retaining wall structure layer includes a first transition retaining wall section and a second transition retaining wall section, the second transition retaining wall section surrounds the first transition retaining wall section, and along the first direction, the maximum thickness of the first transition retaining wall section is less than the thickness of the second transition retaining wall section.

[0105] S205, performing a second exposure and development on the first transition retaining wall section to form a retaining wall structure provided with a protruding structure, wherein the retaining wall structure is located on the first side of the substrate, the retaining wall structure forms an opening, and the protruding structure is located in the opening.

[0106] The first transition retaining wall section is subjected to a second exposure and development to form a retaining wall structure provided with a protruding structure. At this time, the edge exposure and development technology used forms a protruding structure on the side wall of the retaining wall structure.

[0107] S206, providing a plurality of light emitting elements, wherein the light emitting elements are located on the first side of the base substrate, and the light emitting elements correspond to the openings.

[0108] S207, preparing a color conversion layer, the color conversion layer is located on a side of the light emitting element away from the substrate, the color conversion layer is located in the opening, and the color conversion layer is in contact with the protrusion structure.

[0109] In the embodiment of the present invention, a protruding structure is formed on the side wall of the retaining wall structure through double exposure and development technology. The protruding structure is in partial contact with the color conversion layer, which affects the surface tension of the color conversion layer, thereby affecting the surface shape of the color conversion layer close to the light emitting side of the light emitting element, thereby improving the conversion rate of the color conversion layer to the light emitted by the light emitting element, and ensuring the display effect of the display panel.

[0110] Fig. 20 Another method for preparing a display panel provided by an embodiment of the present invention includes:

[0111] S301, providing a substrate.

[0112] S302, providing a growth substrate.

[0113] S303, preparing a second retaining wall structure layer on one side of the growth substrate.

[0114] S304, exposing and developing the first retaining wall structure layer to form a second retaining wall section, the second retaining wall section comprising a second side wall parallel to the first direction and a second surface parallel to the plane where the growth substrate is located, wherein the first direction is a thickness direction of the display panel.

[0115] Among them, a second retaining wall structure layer is first prepared and exposed and developed to form a second retaining wall section, and the central area of ​​the second retaining wall structure layer is developed away so that the second retaining wall section forms a second sub-opening, thereby forming a second side wall parallel to the first direction and a second surface parallel to the plane where the growth substrate is located.

[0116] S305, preparing a first retaining wall structure layer on a side of the second retaining wall section away from the growth substrate.

[0117] S306, exposing and developing the first retaining wall structure layer to form a first retaining wall section, the first retaining wall section includes a first sidewall parallel to the first direction and a first surface parallel to the plane where the growth substrate is located, along the direction parallel to the growth substrate, the projection area of ​​the first surface is smaller than the projection area of ​​the second surface, and a convex structure is formed at the junction of the first retaining wall section and the second retaining wall section.

[0118] Among them, after preparing the second retaining wall section, the first retaining wall structure layer is prepared again. The first retaining wall structure layer and the second retaining wall structure layer can be made of the same material. The first retaining wall structure is exposed and developed to form the first retaining wall section, and the central area of ​​the first retaining wall structure layer and the partial area in contact with the second surface of the second retaining wall structure are developed away, so that the second retaining wall section forms a second sub-opening, which is larger than the central area of ​​the developed first retaining wall structure layer, so that the width of the first sub-opening is smaller than the width of the second sub-opening, that is, the projection area of ​​the first surface of the first retaining wall section is smaller than the projection area of ​​the second surface of the second retaining wall section, and the projection of the first surface falls within the projection range of the second surface, and then optionally, the part of the second surface that is not in contact with the first surface forms a step with the second side wall, that is, a right-angled protrusion structure is formed at the junction of the first retaining wall section and the second retaining wall section, so as to ensure that the color conversion layer is filled in the first sub-opening at the junction of the first retaining wall section and the second retaining wall section, thereby affecting the surface tension of the color conversion layer and ensuring the conversion rate of the color conversion layer to the light emitted by the light-emitting element.

[0119] S307, providing a plurality of light emitting elements, wherein the light emitting elements are located on the first side of the substrate, and the light emitting elements correspond to the openings.

[0120] S308, preparing a color conversion layer, the color conversion layer is located on the side of the light emitting element away from the substrate, the color conversion layer is located in the opening, and the color conversion layer is in contact with the protruding structure.

[0121] The embodiment of the present invention sets the retaining wall structure layer twice and adjusts the developing area of ​​the first retaining wall structure layer and the second retaining wall structure layer, so that the sizes of the formed first retaining wall division and the second retaining wall division are different. The first retaining wall division and the second retaining wall division form a retaining wall structure with a protruding structure, thereby ensuring partial contact between the protruding structure and the color conversion layer, and there is surface tension that affects the color conversion layer, which in turn affects the surface shape of the color conversion layer close to the light emitting side of the light emitting element, thereby improving the conversion rate of the color conversion layer to the light emitted by the light emitting element, and ensuring the display effect of the display panel.

[0122] Fig.21 A schematic diagram of a display device according to an embodiment of the present invention is shown in FIG. Fig.21 As shown, the display device 200 includes the display panel 100 described in the above embodiment.

[0123] It should be noted that since the display device provided in this embodiment has the same or corresponding beneficial effects as the display panel in the above embodiment, no further description is given here. The display device 200 provided in the embodiment of the present invention can be Fig.21The mobile phone shown can also be any electronic product with a display function, including but not limited to the following categories: televisions, laptops, desktop displays, tablet computers, digital cameras, smart bracelets, smart glasses, car displays, medical equipment, industrial control equipment, touch interactive terminals, etc. The embodiments of the present invention do not specifically limit this.

[0124] The above specific implementations do not constitute a limitation on the protection scope of the present invention. It should be understood by those skilled in the art that various modifications, combinations, sub-combinations and substitutions can be made according to design requirements and other factors. Any modification, equivalent substitution and improvement made within the spirit and principle of the present invention should be included in the protection scope of the present invention.

Claims

1. A display panel, characterized in that: include: substrate substrate; A plurality of retaining wall structures are located on the first side of the substrate, and the retaining wall structures form an opening; A plurality of light emitting elements are located on the first side of the base substrate and correspond to the opening; A color conversion layer is located in the opening and at least a portion of the color conversion layer is located on a side of the light emitting element away from the base substrate; a protruding structure, located in the opening and on a side wall of the retaining wall structure, the protruding structure being in contact with the color conversion layer; The protruding structure is used to adjust the surface tension of the color conversion layer so that the thickness of the central area of ​​the color conversion layer is greater than the thickness of the edge area of ​​the color conversion layer.

2. The display panel according to claim 1, characterized in that: The color conversion layer includes a first color conversion sub-section and a second color conversion sub-section, wherein the second color conversion sub-section is arranged around the first color conversion sub-section; along the first direction, the average thickness of the first color conversion sub-section is greater than the average thickness of the second color conversion sub-section; Wherein, the first direction is the thickness direction of the display panel.

3. The display panel according to claim 1, characterized in that: The color conversion layer comprises a first surface close to a side of the base substrate, and along a first direction, the first surface protrudes toward the base substrate; Wherein, the first direction is the thickness direction of the display panel.

4. The display panel according to claim 3, characterized in that: The protruding structure includes a vertex, and along the first direction, a distance between the vertex and the substrate is greater than a minimum distance between the first surface and the substrate.

5. The display panel according to claim 3, characterized in that: The color conversion layer includes a second surface away from the substrate, and the retaining wall structure includes a third surface away from the substrate; Along the first direction, a distance between the second surface and the substrate is greater than or equal to a distance between the third surface and the substrate.

6. The display panel according to claim 3, characterized in that: Along the first direction, a minimum distance between the first surface and the base substrate is greater than or equal to a height of the light emitting element.

7. The display panel according to claim 3, characterized in that , the protrusion structure includes a first protrusion sidewall and a second protrusion sidewall, the first protrusion sidewall is located on a side of the second protrusion sidewall away from the substrate; The included angle between the first protruding side wall and the side wall of the retaining wall structure is a first bottom angle, the first bottom angle faces the second protruding side wall, the included angle between the second protruding side wall and the side wall is a second bottom angle, the second bottom angle faces the first protruding side wall; The second base angle is greater than or equal to the first base angle.

8. The display panel according to claim 1, characterized in that: The color conversion layer covers the light emitting element; The color conversion layer comprises a fourth surface away from the substrate, and along the first direction, the fourth surface is convex toward the side away from the substrate; Wherein, the first direction is the thickness direction of the display panel.

9. The display panel according to claim 8, characterized in that: The protruding structure includes a vertex, and along the first direction, a distance between the vertex and the substrate is smaller than a maximum distance between the fourth surface and the substrate.

10. The display panel according to claim 8, characterized in that: The retaining wall structure comprises a fifth surface away from the substrate base; Along the first direction, a distance between the fifth surface and the substrate is greater than or equal to a maximum distance between the fourth surface and the substrate.

11. The display panel according to claim 8, characterized in that: Along the first direction, a maximum distance between the fourth surface and the base substrate is greater than a height of the light emitting element.

12. The display panel according to claim 8, characterized in that: The protrusion structure comprises a third protrusion sidewall and a fourth protrusion sidewall, wherein the third protrusion sidewall is located on a side of the fourth protrusion sidewall away from the substrate; The included angle between the third protruding side wall and the side wall of the retaining wall structure is a third bottom angle, the third bottom angle faces the fourth protruding side wall, the included angle between the fourth protruding side wall and the side wall is a fourth bottom angle, the fourth bottom angle faces the third protruding side wall; The third base angle is greater than or equal to the fourth base angle.

13. The display panel according to claim 1, characterized in that: The retaining wall structure includes a first retaining wall section and a second retaining wall section stacked in sequence along a first direction, the second retaining wall section is located at a side of the first retaining wall section away from the substrate, the first retaining wall section includes a first side wall parallel to the first direction and a first surface close to the second retaining wall section and parallel to the plane where the substrate is located, the second retaining wall section includes a second side wall parallel to the first direction and a second surface close to the second retaining wall section and parallel to the plane where the substrate is located, along the first direction, the projection area of ​​the first surface is smaller than the projection area of ​​the second surface, and the protruding structure is located at the junction of the first retaining wall section and the second retaining wall section, Wherein, the first direction is the thickness direction of the display panel.

14. The display panel according to claim 1, characterized in that: Along the first direction, the protruding structure does not overlap or partially overlaps with the light emitting element; Wherein, the first direction is the thickness direction of the display panel.

15. The display panel according to claim 1, characterized in that: The protruding structure is a continuous annular structure; Alternatively, the protruding structure includes at least two protruding substructures.

16. The display panel according to claim 15, characterized in that: The protruding structure includes at least two protruding substructures, and the at least two protruding substructures are centrally symmetrically arranged about the center of the opening.

17. The display panel according to claim 1, characterized in that: The color conversion layer includes a first color conversion layer and a second color conversion layer. The opening includes a first opening and a second opening, the convex structure includes a first convex structure and a second convex structure, the first convex structure is located in the first opening, the second convex structure is located in the second opening, the first color conversion layer contacts the first convex structure, and the second color conversion layer contacts the second convex structure; The first color conversion layer includes a first sub-color conversion section and a second sub-color conversion section, and the second sub-color conversion section is arranged around the first sub-color conversion section; the second color conversion layer includes a third sub-color conversion section and a fourth sub-color conversion section, and the fourth sub-color conversion section is arranged around the third sub-color conversion section; along the first direction, the average thickness of the first sub-color conversion section is greater than the average thickness of the second sub-color conversion section; the average thickness of the third sub-color conversion section is greater than the average thickness of the fourth sub-color conversion section; Wherein, the first direction is the thickness direction of the display panel.

18. The display panel according to claim 17, characterized in that: The color conversion wavelength of the first color conversion layer is greater than the color conversion wavelength of the second color conversion layer, and both are greater than the wavelength of the emitted light of the light emitting element; The maximum thickness of the first color conversion layer is smaller than the maximum thickness of the second color conversion layer.

19. The display panel according to claim 18, characterized in that , the first color conversion layer and the second color conversion layer are both located on the side of the light emitting element away from the base substrate, the first color conversion layer includes a sixth surface close to the base substrate, and the second color conversion layer includes a seventh surface close to the base substrate; Along the first direction, the sixth surface protrudes toward the base substrate, and the seventh surface protrudes toward the base substrate; The first convex structure includes a first vertex, the second convex structure includes a second vertex, A distance between the first vertex and the substrate is greater than a distance between the second vertex and the substrate.

20. The display panel according to claim 18, characterized in that: The first color conversion layer and the second color conversion layer are both located on the side of the light emitting element away from the base substrate, the first color conversion layer includes a sixth surface close to the base substrate, and the second color conversion layer includes a seventh surface close to the base substrate; Along the first direction, the sixth surface protrudes toward the base substrate, and the seventh surface protrudes toward the base substrate; The first protrusion structure comprises a fifth protrusion sidewall and a sixth protrusion sidewall, wherein the fifth protrusion sidewall is located on a side of the sixth protrusion sidewall away from the substrate; The included angle between the fifth protruding side wall and the side wall of the retaining wall structure is the fifth bottom angle, the fifth bottom angle faces the side of the sixth protruding side wall, the included angle between the sixth protruding side wall and the side wall is the sixth bottom angle, the sixth bottom angle faces the side of the fifth protruding side wall; the sixth bottom angle is greater than or equal to the fifth bottom angle; The second protrusion structure comprises a seventh protrusion sidewall and an eighth protrusion sidewall, wherein the seventh protrusion sidewall is located on a side of the eighth protrusion sidewall away from the substrate; The included angle between the seventh protrusion side wall and the side wall is the seventh bottom angle, and the seventh bottom angle faces the side of the eighth protrusion side wall. The included angle between the eighth protrusion side wall and the side wall is the eighth bottom angle, and the eighth bottom angle faces the side of the seventh protrusion side wall; the eighth bottom angle is greater than or equal to the seventh bottom angle; the seventh bottom angle is less than the fifth bottom angle.

21. The display panel according to claim 18, characterized in that: The first color conversion layer and the second color conversion layer both cover the light emitting element, the first color conversion layer includes an eighth surface away from the base substrate, and the second color conversion layer includes a ninth surface away from the base substrate; Along the first direction, the eighth surface bulges toward a side away from the base substrate, and the ninth surface bulges toward a side away from the base substrate; The first convex structure includes a third vertex, the second convex structure includes a fourth vertex, A distance between the third vertex and the substrate is smaller than a distance between the fourth vertex and the substrate.

22. The display panel according to claim 18, characterized in that: The first color conversion layer and the second color conversion layer both cover the light emitting element, the first color conversion layer includes an eighth surface away from the base substrate, and the second color conversion layer includes a ninth surface away from the base substrate; Along the first direction, the eighth surface bulges toward a side away from the base substrate, and the ninth surface bulges toward a side away from the base substrate; The first protrusion structure includes a ninth protrusion sidewall and a tenth protrusion sidewall, and the ninth protrusion sidewall is located on a side of the tenth protrusion sidewall away from the substrate; The included angle between the ninth protruding side wall and the side wall of the retaining wall structure is the ninth bottom angle, the ninth bottom angle faces the tenth protruding side wall, the included angle between the tenth protruding side wall and the side wall is the tenth bottom angle, the tenth bottom angle faces the ninth protruding side wall; the ninth bottom angle is greater than or equal to the tenth bottom angle; The second protrusion structure includes an eleventh protrusion sidewall and a twelfth protrusion sidewall, and the eleventh protrusion sidewall is located on a side of the twelfth protrusion sidewall away from the substrate; The angle between the eleventh protrusion side wall and the first direction is the eleventh bottom angle, the eleventh bottom angle is toward the side of the twelfth protrusion side wall, the angle between the twelfth protrusion side wall and the first direction is the twelfth bottom angle, the twelfth bottom angle is toward the side of the eleventh protrusion side wall; the eleventh bottom angle is greater than or equal to the twelfth bottom angle; the twelfth bottom angle is less than the tenth bottom angle.

23. A method for preparing a display panel, characterized in that: Applied to the display panel described in any one of claims 1 to 22, the method comprises: providing a substrate base plate; Prepare and form a plurality of retaining wall structures, wherein the retaining wall structures include protruding structures, the retaining wall structures are located on the first side of the substrate, the retaining wall structures form openings, and the protruding structures are located in the openings; Disposing a plurality of light emitting elements, wherein the light emitting elements are located on the first side of the base substrate, and the light emitting elements correspond to the openings; Prepare a color conversion layer, wherein the color conversion layer is located on a side of the light emitting element away from the base substrate, the color conversion layer is located in the opening, and the color conversion layer is in contact with the protrusion structure; The protruding structure is used to adjust the surface tension of the color conversion layer so that the thickness of the central area of ​​the color conversion layer is greater than the thickness of the edge area of ​​the color conversion layer.

24. The method for preparing a display panel according to claim 23, characterized in that: Prepare and form multiple retaining wall structures, including: providing a growth substrate; preparing a retaining wall structure layer on one side of the growth substrate; The retaining wall structure layer is exposed and developed for the first time to form a transition retaining wall structure layer, wherein the transition retaining wall structure layer includes a first transition retaining wall section and a second transition retaining wall section, wherein the second transition retaining wall section surrounds the first transition retaining wall section, and along a first direction, the maximum thickness of the first transition retaining wall section is less than the thickness of the second transition retaining wall section; wherein the first direction is the thickness direction of the display panel; The first transition retaining wall section is exposed and developed for a second time to form a retaining wall structure with a protruding structure.

25. The method for preparing a display panel according to claim 23, characterized in that: Prepare and form multiple retaining wall structures, including: providing a growth substrate; preparing a second retaining wall structure layer on one side of the growth substrate; Exposing and developing the second retaining wall structure layer to form a second retaining wall section, wherein the second retaining wall section includes a second sidewall parallel to a first direction and a second surface parallel to a plane where the growth substrate is located, wherein the first direction is a thickness direction of the display panel; Prepare a first retaining wall structure layer on a side of the second retaining wall section away from the growth substrate; The second retaining wall structure layer is exposed and developed to form a first retaining wall section, wherein the first retaining wall section includes a first side wall parallel to the first direction and a first surface parallel to the plane where the growth substrate is located; along the direction parallel to the growth substrate, the projection area of ​​the first surface is smaller than the projection area of ​​the second surface, and a protruding structure is formed at the junction of the first retaining wall section and the second retaining wall section.

26. A display device, characterized in that: A display panel comprising any one of claims 1-22.

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