Display panel, display device and preparation method of display panel

Abstract

The invention provides a display panel, a display device and a preparation method of the display panel. The display panel comprises a substrate, a quantum dot layer and a limiting layer. The quantum dot layer is located on one side of the substrate, the quantum dot layer comprises a plurality of function parts, and the function parts comprise quantum dots. The limiting layer and the quantum dot layer are located on the same side of the substrate. The limiting layer is provided with a plurality of limiting openings and a plurality of first containing grooves, each function part is located in the corresponding limiting opening, and the first containing grooves are used for containing materials, overflowing from the limiting openings, of the function parts. According to the technical scheme, the quantum dot ink overflowing from the limiting openings can be stored in the first containing groove, so that the quantum dot ink is prevented from entering other limiting openings or accumulating above the limiting layer, the color crosstalk phenomenon can be avoided, and it is guaranteed that other process steps after ink-jet printing of the display panel are carried out smoothly.

Description

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

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

[0002] Quantum dots can emit light of a specific frequency under certain electric fields or lighting conditions. Display panels can utilize quantum dots to achieve a wider color gamut and higher contrast, thereby improving the display effect of the display panel.

[0003] In existing display panel manufacturing processes, quantum dot layers are fabricated by injecting quantum dot ink into defined openings used to define quantum dot materials via inkjet printing. During inkjet printing, some quantum dot ink may overflow from the openings, adversely affecting subsequent fabrication processes. Summary of the Invention

[0004] This application provides a display panel, a display device, and a method for manufacturing the display panel.

[0005] A first aspect of this application provides a display panel, the display panel comprising:

[0006] Substrate;

[0007] A quantum dot layer is located on one side of the substrate; the quantum dot layer includes a plurality of functional parts, at least some of which include quantum dots;

[0008] A defining layer is located on the same side of the substrate as the quantum dot layer; the defining layer has a plurality of defining openings and a plurality of first receiving grooves; each of the functional parts is located within one of the defining openings; the first receiving grooves are used to receive material of the functional parts that overflows from the defining openings.

[0009] In one embodiment, the plurality of functional units are arranged into a plurality of first groups and a plurality of second groups, the plurality of first groups being arranged along a first direction and the plurality of second groups being arranged along a second direction; each first group includes a plurality of functional units arranged in the second direction, and each second group includes a plurality of functional units arranged in the first direction, wherein the first direction intersects the second direction;

[0010] The first receiving groove is provided between two adjacent functional parts located in the same first group, and the first receiving groove is provided between two adjacent functional parts located in the same second group.

[0011] In one embodiment, the quantum dots of the functional units in the same first group have the same color.

[0012] In one embodiment, two adjacent functional units located in the first group are staggered in the first direction; two adjacent functional units located in the second group are staggered in the second direction.

[0013] Each of the functional parts and the first receiving slots between them located in the same first group and adjacent to each other are the same first receiving slots.

[0014] In one embodiment, the defined opening includes a first sub-opening and a second sub-opening located away from the substrate from the first sub-opening, the first sub-opening communicating with the second sub-opening; at least a portion of the cross-sectional area of ​​the first sub-opening is greater than the maximum cross-sectional area of ​​the second sub-opening.

[0015] In one embodiment, the quantum dot layer is a color conversion layer, and the display panel further includes a light-emitting structure layer located between the substrate and the quantum dot layer; or, the quantum dot layer is a light-emitting material layer of the light-emitting structure layer.

[0016] In one embodiment, the quantum dot layer is a color conversion layer, and the display panel further includes a light-emitting structure layer located between the substrate and the quantum dot layer and a light-shielding layer located on the side of the defining layer away from the substrate. The light-shielding layer has a plurality of through holes, and the orthographic projection of each through hole on the substrate covers the orthographic projection of the top of the defining opening away from the substrate on the substrate. The light-shielding layer has a second receiving groove.

[0017] In one embodiment, the display panel further includes a filling material located within the first receiving slot.

[0018] In one embodiment, the depth of the first receiving groove is less than the depth of the defined opening.

[0019] In one embodiment, the display panel further includes an auxiliary layer located between the quantum dot layer and the substrate, the refractive index of the auxiliary layer being less than that of the quantum dot layer and the defining layer.

[0020] In one embodiment, the display panel further includes an auxiliary layer located between the quantum dot layer and the substrate, the auxiliary layer being made of a hydrophilic material.

[0021] A second aspect of this application provides a display device, the display device including the display panel described above.

[0022] A third aspect of this application provides a method for manufacturing a display panel, used to manufacture the aforementioned display panel, the method comprising:

[0023] Provide the substrate;

[0024] The defining layer is prepared on the substrate, and a plurality of defining openings and a plurality of first receiving grooves are prepared on the defining layer;

[0025] Quantum dot ink is jet-printed into each of the defined openings to form the functional parts, thereby obtaining the quantum dot layer.

[0026] The limiting layer provided in this application embodiment is provided with a plurality of first receiving grooves. During the inkjet printing process, quantum dot ink overflowing from the limiting opening can flow into the first receiving grooves, thereby preventing this part of the quantum dot ink from accumulating on the top of the limiting layer and avoiding this part of the quantum dot ink from affecting the adhesion strength between the film layer prepared on the top of the limiting layer and the limiting layer; at the same time, the setting of the first receiving grooves helps to prevent the quantum dot ink in the limiting opening from overflowing into other limiting openings, thereby helping to avoid the occurrence of color crosstalk.

[0027] It should be understood that the above general description and the following detailed description are exemplary and explanatory only, and do not limit this application. Attached Figure Description

[0028] The accompanying drawings, which are incorporated in and form part of this specification, illustrate embodiments consistent with this application and, together with the description, serve to explain the principles of this application.

[0029] Figure 1 is a top view of a display panel provided in an embodiment of this application;

[0030] Figure 2 is a cross-sectional view of the display panel provided in the embodiment shown in Figure 1, cut along line AA;

[0031] Figure 3 is a cross-sectional view of the display panel provided in the embodiment shown in Figure 1, cut along BB;

[0032] Figure 4 is a schematic diagram of the overflow of quantum dot ink in the display panel of the related technology during inkjet printing;

[0033] Figure 5 is a schematic diagram of the overflow of quantum dot ink during inkjet printing of a display panel provided in an embodiment of this application;

[0034] Figures 6 to 10 are schematic flowcharts of a method for manufacturing a display panel according to an embodiment of this application. Detailed Implementation

[0035] The technical solutions in the embodiments (or "implementations") of this application will be clearly and completely described herein with reference to the accompanying drawings. When the following description relates to the drawings, unless otherwise indicated, the same numbers in different drawings represent the same or similar elements.

[0036] If the embodiments of this application contain terms relating to directional indications or positional relationships (such as up, down, left, right, front, back, inside, outside, top, bottom, center, vertical, horizontal, longitudinal, transverse, length, width, counterclockwise, clockwise, axial, radial, circumferential, etc.), such terms are only used to explain the relative positional relationships and movements between components in a specific posture (as shown in the attached figures); if the specific posture changes, the directional indications or positional relationships will also change accordingly. Furthermore, the terms "first" and "second" used in the embodiments of this application are only for descriptive convenience and should not be construed as indicating or implying relative importance.

[0037] The display panel, display device, and method for manufacturing the display panel according to embodiments of this application will be described in detail below with reference to the accompanying drawings. Unless otherwise specified, the features of the following embodiments and implementations can complement or combine with each other.

[0038] This application provides a display panel, as shown in Figures 1 to 3, the display panel including a substrate 10, a quantum dot layer 20 and a defining layer 30.

[0039] The quantum dot layer 20 is located on one side of the substrate 10. The quantum dot layer 20 includes a plurality of functional portions 21, at least some of which include quantum dots. A defining layer 30 is located on the same side of the substrate 10 as the quantum dot layer 20. The defining layer 30 has a plurality of defining openings 31 and a plurality of first receiving grooves 32. Each functional portion 21 is located within one of the defining openings 31, and the first receiving groove 32 is used to receive material from the functional portion 21 that overflows from the defining opening 31.

[0040] Quantum dots are nanoparticles composed of group II-VI or group III-V elements. By changing the size of quantum dots, their emission spectrum can be altered. By controlling the size and chemical composition of quantum dots, their emission spectrum can cover the entire visible light region.

[0041] As shown in Figure 4, functional parts can be fabricated by inkjet printing quantum dot ink into the defined opening 31', thereby forming a quantum dot layer. During the inkjet printing process, some quantum dot ink may overflow from the defined opening 31'. The overflowing quantum dot ink may enter adjacent defined openings, causing crosstalk in pixel colors, or fall on the top of the defined layer 30', adversely affecting subsequent processes such as encapsulation of the display panel.

[0042] The limiting layer 30 in this application is provided with a plurality of first receiving grooves 32. During the inkjet printing process, quantum dot ink overflowing from the limiting opening 31 can be stored in the first receiving grooves 32, thereby preventing this part of the quantum dot ink from accumulating on the top of the limiting layer and avoiding this part of the quantum dot ink from affecting the adhesion strength between the film layer prepared on the top of the limiting layer and the limiting layer 30. At the same time, the setting of the first receiving grooves 32 helps to prevent the quantum dot ink in the limiting opening 31 from overflowing and flowing into other limiting openings, which is beneficial to avoid the occurrence of color crosstalk.

[0043] In one embodiment, as shown in Figures 2 and 3, the quantum dot layer 20 is a color conversion layer, and the display panel further includes a light-emitting structure layer 40 located between the substrate 10 and the quantum dot layer 20. The light-emitting structure layer 40 includes a plurality of sub-pixels 401, each sub-pixel 401 including a first electrode 42, a light-emitting material layer 45, and a second electrode 43 stacked in a direction away from the substrate 10. One of the first electrode 42 and the second electrode 43 is an anode, and the other is a cathode.

[0044] In one embodiment, as shown in Figures 2 and 3, the display panel further includes a pixel defining layer 41, which has a plurality of pixel openings, and the light-emitting material layer 45 of each sub-pixel 401 is at least partially located within the corresponding pixel opening.

[0045] In one embodiment, all sub-pixels 401 of the light-emitting structure layer 40 emit blue light; each functional unit 21 of the quantum dot layer 20 is correspondingly disposed with one sub-pixel 401, and the orthographic projection of each functional unit 21 on the substrate 10 covers the orthographic projection of the corresponding sub-pixel 401 on the substrate 10. The multiple functional units 21 of the quantum dot layer 20 include a red functional unit 211, a green functional unit 212, and a light-transmitting functional unit 213. The red functional unit 211 converts the blue light emitted by the corresponding sub-pixel 401 into red light, the green functional unit 212 converts the blue light emitted by the corresponding sub-pixel 401 into green light, and the light-transmitting functional unit 213 can transmit the blue light emitted by the corresponding sub-pixel 401.

[0046] In one embodiment, both the red functional unit 211 and the green functional unit 212 include quantum dots. The quantum dots in the red functional unit 211 can emit red light when excited by light emitted from the corresponding sub-pixel 401. The quantum dots in the green functional unit 212 can emit green light when excited by light emitted from the light-emitting structure layer 40. To improve the conversion of light emitted from the light-emitting structure layer 40 by each functional unit 21, scattering particles, such as titanium dioxide particles, can be doped into the quantum dot ink. The light-transmitting functional unit 213 may not include quantum dots and can be prepared solely by inkjet printing white ink doped with scattering particles.

[0047] In other embodiments, the quantum dot layer can be directly used as the luminescent material layer of the luminescent structure layer 40, with the anode and cathode located on opposite sides of the quantum dot layer, and the quantum dot layer emitting light directly through current excitation. In this embodiment, the luminescent material layer of each sub-pixel includes quantum dots.

[0048] In one embodiment, as shown in FIG2, the display panel further includes a driving circuit layer 44 located between the light-emitting structure layer 40 and the substrate 10. The driving circuit layer 44 includes a plurality of pixel circuits, each pixel circuit being electrically connected to a sub-pixel 401 for driving the sub-pixel 401. The pixel circuit includes a plurality of thin-film transistors, and the first electrode 42 of the sub-pixel 401 is electrically connected to a thin-film transistor T1, T2 and T3 of the pixel circuit.

[0049] In one embodiment, as shown in Figures 2 and 3, the display panel further includes a first encapsulation layer 50 located on the side of the cathode 43 away from the substrate 10. The first encapsulation layer 50 includes alternating inorganic and organic layers, with the inorganic layer being the layer furthest from the substrate 10. In some embodiments, the first encapsulation layer 50 includes stacked inorganic layer 51, organic layer 52, and inorganic layer 53.

[0050] In one embodiment, as shown in Figures 2 and 3, the display panel further includes an auxiliary layer 54 located between the inorganic layer 53 and the quantum dot layer 20. The auxiliary layer 54 is made of a hydrophilic material, which can improve the hydrophilicity and hydrophobicity of the inorganic layer 53, making it easier for the quantum dot ink of the quantum dot layer 20 to adhere to the auxiliary layer 54.

[0051] In one embodiment, the refractive index of the auxiliary layer 54 is less than that of the quantum dot layer 20 and the limiting layer 30, and the refractive index of the auxiliary layer 54 is also less than that of the first encapsulation layer 50. The auxiliary layer 54 can form a total internal reflection interface with the quantum dot layer 20, which plays a role in light recycling and is beneficial to improving the light emission efficiency of the display panel.

[0052] In one embodiment, as shown in Figures 2 and 3, the display panel further includes a second encapsulation layer 71 located on the side of the quantum dot layer 20 and the light-shielding layer 60 away from the substrate 10. The second encapsulation layer 71 can be an inorganic material layer, which can effectively reduce the amount of water and oxygen intruding into the quantum dot layer 20 and improve the service life of the display panel.

[0053] In one embodiment, as shown in FIG1, multiple functional parts 21 are arranged into multiple first groups 214 and multiple second groups 215. The multiple first groups 214 are arranged along a first direction X, and the multiple second groups 215 are arranged along a second direction Y. Each first group 214 includes multiple functional parts 21 arranged along the second direction Y, and each second group includes multiple functional parts 21 arranged along the first direction X, where the first direction X intersects the second direction Y. A first receiving groove 32 is provided between two adjacent functional parts 21 in the same first group 214, and a first receiving groove 32 is also provided between two adjacent functional parts 21 in the same second group 215. With this configuration, each functional part 21 is provided with a first receiving groove 32 between it and its adjacent functional parts 21, which can more effectively prevent the material of the functional layer 21 from accumulating on the surface of the limiting layer, and at the same time, more effectively prevent the material of the functional layer from flowing into the adjacent limiting opening.

[0054] In one embodiment, the first direction X is perpendicular to the second direction Y.

[0055] In one embodiment, the quantum dots of the functional parts 21 within the same first group 214 are of the same color. For example, the functional parts 21 in the first group 214a are all red, and the functional parts 21 in the first group 214b are all green. During inkjet printing, quantum dot ink of the same color is injected into each defined opening of each column of the first group 214 along the second direction Y. This arrangement ensures that the functional parts 21 in each group are of the same color, further avoiding color crosstalk between different functional parts 21. During inkjet printing, functional parts 21 of the same color can be printed at once, thereby simplifying the printing process and improving production efficiency.

[0056] In one embodiment, two adjacent functional units 21 located in two adjacent first groups 214 are staggered in the first direction X, and two adjacent functional units 21 located in two adjacent second groups 215 are staggered in the second direction Y. Each functional unit 21 and the first receiving groove 32 between it and the adjacent functional unit in the same first group 214, and the first receiving groove 32 between it and the adjacent functional unit in the same second group 215, are the same first receiving groove 32.

[0057] As shown in Figure 1, in the first direction X, in the adjacent first group 214a and first group 251a, each functional part 21 in the first group 214a is staggered with the adjacent functional part 21 in the first group 214b in the second direction Y; in the adjacent second group 215a and second group 215b, each functional part 21 in the second group 215a is staggered with the adjacent functional part 21 in the second group 215b in the first direction X.

[0058] As shown in Figure 1, taking the first receiving groove 32' as an example, the first receiving groove 32' is both the first receiving groove between two adjacent functional parts in the first group 214a and the first receiving groove between two adjacent functional parts in the second group 215b.

[0059] The staggered arrangement of the functional units 21 can reduce color crosstalk after quantum dot ink overflow. Furthermore, the staggered arrangement of the functional units 21 allows them to share the first receiving slot 32 with other functional units 21, which helps to reduce the number of first receiving slots 32 and the area occupied by the first receiving slots 32, thereby increasing the light-emitting area of ​​the display panel.

[0060] In one embodiment, as shown in Figures 2 and 5, the defined opening 31 includes a first sub-opening 311 and a second sub-opening 312 located away from the substrate 10. The first sub-opening 311 and the second sub-opening 312 are in communication, and at least a portion of the cross-sectional area of ​​the first sub-opening 311 is larger than the maximum cross-sectional area of ​​the second sub-opening 312. With this configuration, the side of the second sub-opening 312 is recessed relative to at least a portion of the side of the first sub-opening 311. During the inkjet printing of quantum dot ink into the defined opening 31, the quantum dot ink falls into the first sub-opening 311. When the quantum dot ink splashes, the side of the first sub-opening 311 can shield the quantum dot ink, reducing the likelihood of the quantum dot ink splashing out of the defined opening 31.

[0061] In one embodiment, in the direction from the substrate 10 to the defining layer 30, the cross-sectional area of ​​the first sub-opening 311 gradually decreases, the cross-sectional area of ​​the second sub-opening 312 gradually decreases, and the minimum cross-sectional area of ​​the first sub-opening 311 is greater than the maximum cross-sectional area of ​​the second sub-opening 312. In some embodiments, the first sub-opening 311 and the second sub-opening 312 are smoothly connected. For example, the cross-sectional shape of the defining opening 31 in the vertical direction is a trapezoid that is narrower at the top and wider at the bottom, and the minimum cross-sectional area of ​​the first sub-opening 311 is equal to the maximum cross-sectional area of ​​the second sub-opening 312.

[0062] In one embodiment, as shown in FIG5, the edge of the longitudinal section of the first receiving groove 32 may be approximately arc-shaped; the minimum cross-sectional area of ​​the first sub-opening 311 is equal to the maximum cross-sectional area of ​​the second sub-opening 312; the defining opening 31 further includes a third sub-opening 313 on the side of the first sub-opening 311 facing the substrate 10, and the cross-sectional area of ​​the third sub-opening 313 gradually increases in the direction from the substrate 10 to the defining layer 30. In the embodiment shown in FIG5, the third sub-opening 313 is smoothly connected to the first sub-opening 311, and the maximum cross-sectional area of ​​the third sub-opening 313 is the same as the maximum cross-sectional area of ​​the first sub-opening 311.

[0063] In one embodiment, as shown in FIG2, the shape and depth of the first receiving groove 32 are the same as the shape and depth of the limiting opening 31. In this way, the first receiving groove 32 and the limiting opening 31 can be fabricated on the limiting layer 30 at the same time, which helps to simplify the manufacturing process of the display panel.

[0064] In one embodiment, the depth of the first receiving groove 32 is less than the depth of the defining opening 31. After inkjet printing is completed, an encapsulation layer needs to be formed on the side of the quantum dot layer 20 and the defining layer 30 away from the substrate 10. Since there is a large amount of quantum dot ink in the defining opening 31, almost filling the entire defining opening 31, while there is less ink in the first receiving groove 32, setting the depth of the first receiving groove 32 to be less than the depth of the defining opening 31 can reduce the breakage and prevent the encapsulation layer from breaking at the first receiving groove 32, thus affecting the encapsulation effect.

[0065] In one embodiment, as shown in FIG2, the display panel further includes a filling material located within the first receiving groove 32. This filling material may be ink doped with only scattering particles but without quantum dots. When there is a small amount of quantum dot ink in the first receiving groove 32, filling the first receiving groove 32 with the filling material helps to reduce the breakage and prevent the encapsulation layer from breaking at the first receiving groove 32.

[0066] In one embodiment, as shown in Figures 2 and 3, the display panel further includes a light-shielding layer 60 located on the side of the limiting layer 30 away from the substrate 10. The light-shielding layer 60 is provided with a plurality of through holes 61. The orthogonal projection of each through hole 61 on the substrate 10 covers the orthogonal projection of the top of the limiting opening 31 away from the substrate 10 on the substrate 10. The light-shielding layer 60 is provided with a second receiving groove 62.

[0067] The light-shielding layer 60 can be formed before the functional part 21 is formed. During inkjet printing, quantum dot ink enters the defined opening 31 through the through-hole 61. Some quantum dot ink may overflow or splash from the defined opening 31 and accumulate on top of the light-shielding layer 60. The second receiving groove 62 can accommodate this overflowed quantum dot ink, preventing it from remaining on the top of the light-shielding layer 60 and thus adversely affecting the fabrication of the display panel. Furthermore, the second receiving groove 62 also helps reduce the reflection of ambient light incident on the light-shielding layer 60, reducing the emission of this light from the light-emitting surface of the display panel and improving the color contrast of the display panel.

[0068] In one embodiment, as shown in Figures 2 and 3, the display panel further includes a light filter layer 63 located on the side of the second encapsulation layer 71 away from the substrate 10. The light filter layer 63 can filter out unwanted light from the display panel to improve the color purity and contrast of the display panel.

[0069] In one embodiment, as shown in Figures 2 and 3, the display panel further includes a leveling layer 80 located on the side of the light filter layer 63 away from the substrate 10. The leveling layer 80 can fill uneven areas on the light filter layer 63 and the second encapsulation layer 71, and can also fill the second receiving groove 62 of the light shielding layer 60. The leveling layer 80 can provide a flat surface, which facilitates the preparation of subsequent film layers.

[0070] In one embodiment, as shown in Figures 2 and 3, the display panel further includes a third encapsulation layer 72 located on the side of the leveling layer 80 away from the substrate 10, and a protective layer 90 located on the side of the third encapsulation layer 72 away from the substrate 10. The third encapsulation layer 72 and the protective layer 90 can provide protection for other film layers.

[0071] In one embodiment, the substrate 10 can be a flexible substrate, and the material of the flexible substrate can be polyimide, thermoplastic polyester, etc. Alternatively, the substrate 10 can be a rigid substrate, and the material of the rigid substrate can be glass, quartz, etc.

[0072] This application also provides a display device, which includes the display panel described above.

[0073] In one embodiment, the display device further includes a driver and a power supply circuit, wherein the driver is used to provide a driving signal for driving the sub-pixels to emit light, and the power supply circuit is used to supply power to the display panel.

[0074] In one embodiment, the display device further includes a housing, and the display panel is disposed within the housing.

[0075] This application does not impose specific limitations on the application of display devices, which can be any product or component with display function, such as televisions, laptops, tablets, wearable display devices, mobile phones, in-vehicle displays, navigation systems, e-books, digital photo frames, and advertising light boxes.

[0076] This application also provides a method for manufacturing a display panel, which is used to manufacture the above-mentioned display panel. The manufacturing method includes:

[0077] Step S1: Provide a substrate;

[0078] Step S2: The defining layer is prepared on the substrate, and a plurality of defining openings and a plurality of first receiving grooves are prepared on the defining layer;

[0079] Step S3: Inkjet print quantum dot ink into each of the defined openings to form the functional part, thereby obtaining the quantum dot layer.

[0080] In one embodiment, the quantum dot layer is a color conversion layer, and the display panel further includes a light-emitting structure layer located between the substrate and the quantum dot layer. The fabrication process of the display panel is described in detail below with reference to Figures 6 to 10.

[0081] In one embodiment, after step S1 and before step S2, the method for fabricating the display panel further includes the following steps: forming a driving circuit layer 44 on a substrate 10; forming a pixel defining layer 41 on the side of the driving circuit layer 44 away from the substrate 10; forming a light-emitting structure layer 40; and forming a first encapsulation layer 50 on the side of the light-emitting structure layer 40 away from the substrate 10. This process yields the structure shown in FIG6.

[0082] In one embodiment, as shown in FIG7, after forming the first encapsulation layer 50, the method for manufacturing the display panel further includes forming an auxiliary layer 54 on the first encapsulation layer 50.

[0083] As shown in Figure 8, step S2 includes the following process: forming a whole layer of limiting layer and light-shielding layer on the auxiliary layer 54, and performing exposure and development treatment on the limiting layer and light-shielding layer to form a through hole 61 penetrating the light-shielding layer and a limiting opening 31 and a first receiving groove in the limiting layer 30.

[0084] In one embodiment, during the process of forming the defined opening 31 and the first receiving groove, two development processes can be performed, wherein the first development forms the portion of the first receiving groove away from the substrate, and the second development forms the portion of the first receiving groove close to the substrate, and the duration of the second development is longer than the duration of the first development, thereby obtaining the first receiving groove as shown in FIG5.

[0085] In one embodiment, after forming the defining layer and the light-shielding layer, the method for manufacturing the display panel further includes the following step: forming a second receiving groove 62 on the light-shielding layer 60 above the defining layer 30 by photolithography.

[0086] In step S3: As shown in Figures 9 and 10, quantum dot ink is sprayed into the defined opening 31 to form the functional part 21. Specifically, quantum dot particles and scattering particles of different sizes can be doped into the resin to form the red functional part 211, the green functional part 212, and the transparent functional part 213 corresponding to the sub-pixel 401.

[0087] In one embodiment, after step S3, the method for preparing the display panel further includes the following steps: sequentially forming a second encapsulation layer 71, a light filter layer 63, a leveling layer 80, a third encapsulation layer 72, and a protective layer 90 on the light-shielding layer.

[0088] The embodiments of the display panel preparation method provided in this application and the embodiments of the display panel belong to the same inventive concept. The descriptions of relevant details and beneficial effects can be referred to each other and will not be repeated here.

[0089] It should be noted that the technical solutions or features described in the above embodiments can be combined or supplemented with each other without conflict. The scope of protection of this application is not limited to the precise structures described in the above embodiments and shown in the accompanying drawings; all modifications, equivalent substitutions, improvements, etc., made within the spirit and principles of this application should be included within the scope of protection of this application.

Claims

1. A display panel, characterized in that, The display panel includes: a substrate; a quantum dot layer located on one side of the substrate; the quantum dot layer includes a plurality of functional portions, at least some of which include quantum dots; a defining layer located on the same side of the substrate as the quantum dot layer; the defining layer has a plurality of defining openings and a plurality of first receiving grooves; each of the functional portions is located within one of the defining openings; the first receiving grooves are used to receive material from the functional portions overflowing from the defining openings.

2. The display panel according to claim 1, characterized in that, The plurality of functional parts are arranged into a plurality of first groups and a plurality of second groups. The plurality of first groups are arranged along a first direction, and the plurality of second groups are arranged along a second direction. Each first group includes a plurality of functional parts arranged in the second direction, and each second group includes a plurality of functional parts arranged in the first direction. The first direction and the second direction intersect. A first receiving groove is provided between two adjacent functional parts in the same first group and between two adjacent functional parts in the same second group.

3. The display panel according to claim 2, characterized in that, The quantum dots in the same functional unit of the first group have the same color.

4. The display panel according to claim 2, characterized in that, The two adjacent functional parts located in the first group are staggered in the first direction; the two adjacent functional parts located in the second group are staggered in the second direction; the first receiving groove between each functional part and the functional part located in the same first group and adjacent to it and the first receiving groove between each functional part located in the same second group and adjacent to it are the same first receiving groove.

5. The display panel according to claim 1, characterized in that, The defined opening includes a first sub-opening and a second sub-opening located away from the substrate from the first sub-opening, the first sub-opening being in communication with the second sub-opening; at least a portion of the cross-sectional area of ​​the first sub-opening is greater than the maximum cross-sectional area of ​​the second sub-opening.

6. The display panel according to claim 1, characterized in that, The quantum dot layer is a color conversion layer, and the display panel further includes a light-emitting structure layer located between the substrate and the quantum dot layer; or, the quantum dot layer is a light-emitting material layer of the light-emitting structure layer.

7. The display panel according to claim 1, characterized in that, The quantum dot layer is a color conversion layer. The display panel also includes a light-emitting structure layer located between the substrate and the quantum dot layer, and a light-shielding layer located on the side of the limiting layer away from the substrate. The light-shielding layer has a plurality of through holes, and the orthographic projection of each through hole on the substrate covers the orthographic projection of the top of the limiting opening away from the substrate on the substrate. The light-shielding layer has a second receiving groove.

8. The display panel according to claim 1, characterized in that, The display panel also includes filling material located in the first receiving slot.

9. The display panel according to claim 1, characterized in that, The depth of the first receiving groove is less than the depth of the defined opening.

10. The display panel according to claim 1, characterized in that, The display panel further includes an auxiliary layer located between the quantum dot layer and the substrate, wherein the refractive index of the auxiliary layer is less than that of the quantum dot layer and the defining layer.

11. The display panel according to claim 1, characterized in that, The display panel further includes an auxiliary layer located between the quantum dot layer and the substrate, the auxiliary layer being made of a hydrophilic material.

12. A display device, characterized in that, Includes the display panel as described in any one of claims 1 to 11.

13. A method for manufacturing a display panel, used to manufacture the display panel according to any one of claims 1 to 11, characterized in that, The preparation method includes: providing the substrate; preparing the defining layer on the substrate, and preparing a plurality of defining openings and a plurality of first receiving grooves on the defining layer; inkjet printing quantum dot ink into each of the defining openings to form the functional part, thereby obtaining the quantum dot layer.

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