Display panel and display device

Abstract

The present application relates to the technical field of display. Disclosed are a display panel and a display device. The display panel comprises a substrate, an insulation layer located on the substrate, and a plurality of light-emitting units located on the insulation layer, wherein the light-emitting units each comprises a first electrode layer, a light-emitting layer and a second electrode layer. In the present application, a plurality of curved surface structures are provided on a surface of the insulation layer away from the substrate, and the plurality of light-emitting units are respectively located on the plurality of curved surface structures, so that under such a structure, an electrode and the light-emitting layer in each light-emitting unit located on each curved surface structure can take the form of a curved surface, the electrode can drive the light-emitting layer in the form of a curved surface to emit light, and the light-emitting unit in the form of a curved surface has a larger light emission area compared to a flat light-emitting unit, thereby improving the brightness, solving the problem in the related art of poor brightness of a display panel, and achieving the effect of improving the brightness of a display panel.

Description

Display panel and display device

[0001] This disclosure claims priority to Chinese patent application No. 202311257404.4 filed on September 26, 2023, entitled “Display Panel and Display Device.” The entire contents of the above case are incorporated herein by reference. Technical Field

[0002] The present application relates to the field of display technology, and in particular to a display panel and a display device. Background Art

[0003] A display panel is a structure that has the function of displaying images.

[0004] A display panel includes a base substrate, a flat layer and a conductive circuit located on the base substrate, the flat layer covers the conductive circuit, and a plurality of light-emitting units located on the flat layer, wherein the plurality of light-emitting units located on the flat layer are planar in shape, and the conductive circuit can transmit electrical signals for the plurality of light-emitting units.

[0005] However, the actual light-emitting area of ​​the planar light-emitting unit is small, resulting in poor brightness of the display panel.

[0006] Summary of the Invention

[0007] An embodiment of the present application provides a display panel, comprising:

[0008] substrate;

[0009] an insulating layer, the insulating layer being located on the substrate, and a surface of the insulating layer away from the substrate having a plurality of curved surface structures;

[0010] Multiple light-emitting units are respectively located on the multiple curved structures, and the light-emitting units include a first electrode layer, a light-emitting layer and a second electrode layer. The first electrode layer is located on the curved structure, the light-emitting layer is located on a side of the first electrode layer away from the curved structure, and the second electrode is located on a side of the light-emitting layer away from the curved structure.

[0011] Optionally, the plurality of curved surface structures include at least one of a first convex curved surface structure that bulges away from the substrate and a first concave curved surface structure that is concave toward the substrate.

[0012] Optionally, the display panel further includes a first light modulation layer, the first light modulation layer being located on a side of the light-emitting unit away from the substrate, the first light modulation layer including a stacked first low-refractive layer and a first high-refractive layer, the first high-refractive layer being located on a side of the first low-refractive layer away from the substrate, and the refractive index of the first low-refractive layer being smaller than the refractive index of the first high-refractive layer;

[0013] The first low-refractive layer has a plurality of second inwardly concave curved surface structures on a surface away from the substrate and recessed toward the substrate on a surface close to the substrate, and the first high-refractive layer has a plurality of second outwardly convex curved surface structures on a surface close to the substrate, wherein the second inwardly concave curved surface structures and the second outwardly convex curved surface structures are complementary structures, and the second outwardly convex curved surface structures are located within the second inwardly concave curved surface structures;

[0014] The orthographic projection of the light-emitting unit on the substrate overlaps with the orthographic projection of the second concave curved surface structure of the first low-refractive layer on the substrate.

[0015] Optionally, the display panel further includes an encapsulation layer, the encapsulation layer is located on a side of the light-emitting unit away from the substrate, and the first light modulation layer is located on a side of the encapsulation layer away from the light-emitting unit.

[0016] Optionally, the display panel further includes an encapsulation layer, the encapsulation layer including a first inorganic encapsulation layer, an organic encapsulation layer, and a second inorganic encapsulation layer stacked on a side of the light-emitting unit away from the substrate, the first light modulation layer being located between the first inorganic encapsulation layer and the organic encapsulation layer, the first light modulation layer including a first low-refractive layer, the refractive index of the first low-refractive layer being lower than the refractive index of the organic encapsulation layer;

[0017] A surface of the first low-refractive layer away from the substrate has a plurality of second inwardly concave curved surface structures that are recessed toward the substrate, and a surface of the organic encapsulation layer close to the substrate has a plurality of second outwardly convex curved surface structures that are convex toward the substrate. The second inwardly concave curved surface structures and the second outwardly convex curved surface structures are complementary structures, and the second outwardly convex curved surface structures are located within the second inwardly concave curved surface structures.

[0018] Optionally, the display panel further includes a second light modulation layer, the second light modulation layer being located on a side of the encapsulation layer away from the substrate, the second light modulation layer including a second high-refractive layer and a second low-refractive layer stacked, and a refractive index of the second low-refractive layer being smaller than a refractive index of the second high-refractive layer;

[0019] The second low-refractive layer has a plurality of third inwardly concave curved surface structures on a surface close to the substrate and recessed in a direction away from the substrate, and the second high-refractive layer has a plurality of third outwardly convex curved surface structures on a surface away from the substrate and convexed in a direction away from the substrate, wherein the third inwardly concave curved surface structures and the third outwardly convex curved surface structures are complementary structures, and the third outwardly convex curved surface structures are located within the third inwardly concave curved surface structures;

[0020] The orthographic projection of the light-emitting unit on the substrate overlaps with the orthographic projection of the third concave curved surface structure of the second low-refractive layer on the substrate.

[0021] Optionally, the orthographic projection of the third concave curved surface structure of the second low-refractive layer on the substrate overlaps with the orthographic projection of the second concave curved surface structure of the first low-refractive layer on the substrate.

[0022] Optionally, the display panel further comprises a pixel definition layer, wherein the pixel definition layer is located on a region of the insulating layer that is away from the substrate and does not have the curved surface structure;

[0023] The pixel definition layer includes a reflective material, or the first inorganic encapsulation layer covers the pixel definition layer and a refractive index of the pixel definition layer is smaller than a refractive index of the first inorganic encapsulation layer.

[0024] Optionally, the orthographic projection of the light emitting unit on the substrate is located in the orthographic projection of the second concave curved surface structure on the substrate, and the orthographic projection of the edge of the light emitting unit on the substrate is spaced from the orthographic projection of the edge of the second concave curved surface structure on the substrate.

[0025] Optionally, the display panel satisfies: h1 / v1≤h2 / v2<0.5;

[0026] Among them, h1 is the maximum height difference between the area having the curved surface structure and the area not having the curved surface structure on the side of the insulating layer away from the substrate in the first direction perpendicular to the substrate, v1 is the maximum width of the curved surface structure of the insulating layer in the direction parallel to the substrate, h2 is the maximum height difference between the area having the second concave curved surface structure and the area not having the second concave curved surface structure on the side of the first low-refractive layer away from the substrate in the first direction, and v2 is the maximum width of the second concave curved surface structure of the first low-refractive layer in the direction parallel to the substrate.

[0027] Optionally, the display panel further comprises a pixel definition layer, wherein the pixel definition layer is located on a side of the insulating layer away from the substrate, and the pixel definition layer is located between the multiple curved structures;

[0028] The display panel satisfies: H<D=tan(v1 / 2h1)*(g+v1) / 2, H is the minimum distance between the second concave curved surface structure of the first low-refractive layer and the light-emitting unit in the first direction, D is the minimum distance between the mixing point and the pixel definition layer in the first direction perpendicular to the substrate, the mixing point is the point where the light emitted by two adjacent light-emitting units among the multiple light-emitting units and the light that does not irradiate the pixel definition layer intersect, h1 is the maximum height difference in the first direction between the area having the curved surface structure and the area not having the curved surface structure on the side of the insulating layer away from the substrate, v1 is the maximum width of the curved surface structure of the insulating layer in the direction parallel to the substrate, and g is the distance between two adjacent light-emitting units in the direction parallel to the substrate.

[0029] Optionally, a surface of the insulating layer away from the substrate has a plurality of first concave curved surface structures that are concave in a direction approaching the substrate;

[0030] The thickness of the region of the insulating layer away from the substrate without the curved surface structure is in the range of 3 micrometers to 5 micrometers, and the thickness of the region of the insulating layer away from the substrate with the curved surface structure is greater than or equal to 1 micrometer.

[0031] Optionally, a maximum height difference between a region having the curved surface structure and a region not having the curved surface structure on a side of the insulating layer away from the substrate in a first direction perpendicular to the substrate is greater than 0 micrometers and less than or equal to 2 micrometers.

[0032] Optionally, the display panel further includes a conductive circuit, the conductive circuit is located on the substrate, the insulating layer covers the conductive circuit, and an orthographic projection of the curved structure on the substrate overlaps with an orthographic projection of the conductive circuit on the substrate.

[0033] According to another aspect of an embodiment of the present application, a display device is provided. The display device includes a housing and the display panel, wherein the display panel is located in the housing.

[0034] The beneficial effects of the technical solutions provided in the embodiments of the present application include at least:

[0035] Provided is a display panel comprising a substrate, an insulating layer, and a plurality of light-emitting units. The insulating layer has a plurality of curved structures on a side away from the substrate, and the plurality of light-emitting units are respectively located on the plurality of curved structures. Under such a structure, the electrodes and the light-emitting layers in the light-emitting units located on the curved structures can be curved, and the electrodes can drive the curved light-emitting layers to emit light. Compared with planar light-emitting units, the curved light-emitting units have a larger light-emitting area, thereby improving the brightness, solving the problem of poor brightness of display panels in related technologies, and achieving the effect of improving the brightness of the display panel. BRIEF DESCRIPTION OF THE DRAWINGS

[0036] In order to more clearly illustrate the technical solutions in the embodiments of the present application, 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 application. For ordinary technicians in this field, other drawings can be obtained based on these drawings without any creative work.

[0037] FIG1 is a schematic structural diagram of a display panel;

[0038] FIG2 is a schematic structural diagram of a display panel provided in an embodiment of the present application;

[0039] FIG3 is a schematic structural diagram of another display panel provided in an embodiment of the present application;

[0040] FIG4 is a schematic structural diagram of another display panel provided in an embodiment of the present application;

[0041] FIG5 is a schematic structural diagram of another display panel provided in an embodiment of the present application;

[0042] FIG6 is a schematic structural diagram of another display panel provided in an embodiment of the present application;

[0043] FIG7 is a schematic structural diagram of another display panel provided in an embodiment of the present application;

[0044] FIG8 is a schematic diagram of a partial structure of another display panel provided in an embodiment of the present application;

[0045] FIG9 is a schematic diagram of a partial structure of another display panel provided in an embodiment of the present application;

[0046] FIG10 is a schematic structural diagram of another display panel provided in an embodiment of the present application;

[0047] FIG11 is a schematic diagram showing the principle of a polarization structure layer provided in an embodiment of the present application;

[0048] FIG12 is a schematic top view of a circular light-emitting unit with a curved structure provided in an embodiment of the present application;

[0049] FIG13 is a schematic top view of a square light-emitting unit with a curved structure provided in an embodiment of the present application;

[0050] FIG14 is a schematic top view of a rectangular light-emitting unit with a curved surface structure provided in an embodiment of the present application;

[0051] FIG15 is a schematic diagram of a top view of a hexagonal light-emitting unit with a curved structure provided in an embodiment of the present application.

[0052] The above drawings illustrate specific embodiments of the present application, which will be described in more detail below. These drawings and the textual description are not intended to limit the scope of the present application in any way, but rather to illustrate the concepts of the present application to those skilled in the art by reference to specific embodiments. DETAILED DESCRIPTION

[0053] In order to make the objectives, technical solutions and advantages of this application clearer, the implementation methods of this application will be further described in detail below with reference to the accompanying drawings.

[0054] Figure 1 provides a schematic structural diagram of a display panel. Please refer to Figure 1. The display panel 10 includes: a substrate 11; a flat layer 12, the flat layer 12 is located on the substrate 11; a plurality of pixel definition layers 13, the pixel definition layer 13 is located on a side of the flat layer 12 away from the substrate 11; a plurality of light-emitting units 14, the plurality of light-emitting units 14 are respectively located on an area of ​​the side of the flat layer 12 away from the substrate 11 where no pixel definition layer is provided, the light-emitting units 14 include a first electrode layer 141, a light-emitting layer 142 and a second electrode layer 143, the first electrode layer 141 is located on the flat layer 12, the light-emitting layer 142 is located on a side of the first electrode layer 141 away from the flat layer 12, and the second electrode 143 is located on a side of the light-emitting layer 142 away from the flat layer 12; a conductive circuit 15, the conductive circuit 15 is located on the substrate 11, and the flat layer 12 covers the conductive circuit 15.

[0055] The plurality of light emitting units 14 located on the flat layer 12 are planar in shape, and the actual light emitting area of ​​the planar light emitting units 13 is small, resulting in poor brightness of the display panel 10 .

[0056] In addition, the conductive circuit 15 itself is in a convex shape, and the flat layer 12 covers the conductive circuit 15, which causes the flat layer 12 to form irregular convexities or concavities that are difficult to control as shown in area A, resulting in the surfaces of the multiple light-emitting units 14 located on the flat layer 12 being uneven and non-uniform, which can cause the display panel 10 to have problems such as uneven brightness and color deviation.

[0057] An embodiment of the present application provides a display panel. Please refer to FIG2 , which is a schematic structural diagram of a display panel provided by an embodiment of the present application. The display panel 20 includes: a substrate 21; an insulating layer 22, the insulating layer 22 being located on the substrate 21, and having a plurality of curved structures 221 on a side of the insulating layer 22 facing away from the substrate 21; and a plurality of light-emitting units 23, each located on the plurality of curved structures 221. The light-emitting units 23 include a first electrode layer 231, a light-emitting layer 232, and a second electrode layer 233. The first electrode layer 231 is located on the curved structures 221, the light-emitting layer 232 is located on a side of the first electrode layer 231 facing away from the curved structures 221, and the second electrode 233 is located on a side of the light-emitting layer 232 facing away from the curved structures 221. The curved shape of the light-emitting layer 232 allows for a larger light-emitting area compared to a flat light-emitting layer.

[0058] In summary, an embodiment of the present application provides a display panel including a substrate, an insulating layer and a plurality of light-emitting units, wherein a side of the insulating layer away from the substrate has a plurality of curved structures, and the plurality of light-emitting units are respectively located on the plurality of curved structures. Under such a structure, the electrodes and the light-emitting layer in the light-emitting units located on the curved structures can be curved, and the electrodes can drive the curved light-emitting layer to emit light. Compared with the planar light-emitting units, the curved light-emitting units have a larger light-emitting area, which improves the brightness, solves the problem of poor brightness of the display panel in the related art, and achieves the effect of improving the brightness of the display panel.

[0059] Optionally, the plurality of curved surface structures include at least one of a first outwardly convex curved surface structure that convexes away from the substrate and a first inwardly concave curved surface structure that concavely ...

[0060] The display panel provided in the embodiment of the present application may also include only one of the curved surface structures. Please refer to Figures 3 and 4. Figure 3 is a structural schematic diagram of a display panel provided in the embodiment of the present application including a first convex curved surface structure, and Figure 4 is a structural schematic diagram of a display panel provided in the embodiment of the present application including a first concave curved surface structure. The curved surface structure shown in Figure 3 is a first convex curved surface structure 221 that convexes in a direction away from the substrate 21, and the curved surface structure shown in Figure 4 is a first concave curved surface structure 221 that is concave in a direction close to the substrate 21. The display panel 20 also includes a conductive circuit 24. The conductive circuit 24 is located on the substrate 21, and the insulating layer 22 covers the conductive circuit 24. The conductive circuit 24 can transmit electrical signals for multiple light-emitting units 23. The orthographic projection of the curved surface structure 221 on the substrate 21 overlaps with the orthographic projection of the conductive circuit 24 on the substrate 21, that is, the conductive circuit 24 is below the curved surface structure 221.

[0061] The conductive circuit 24 itself is a convex shape. For the display panel shown in Figure 3, the insulating layer 22 includes a plurality of first convex curved surface structures 221 that protrude in a direction away from the substrate 21. This can increase the distance between the light-emitting unit 23 and the conductive circuit 23, thereby avoiding the influence of the convex conductive circuit 24 on the surface morphology of the light-emitting unit 23, and improving the uniformity of the brightness of the display panel 20 and the uniformity of the color deviation under different viewing angles.

[0062] For the display panel shown in Figure 4, the insulating layer 22 includes a plurality of first concave curved surface structures 221 that are recessed in a direction close to the substrate 21. A flat insulating layer can be formed on the substrate 21, and then the first concave curved surface structure 221 can be obtained by etching the flat insulating layer. Therefore, the morphology of the bottom of the first concave curved surface structure 221 is not affected by the raised conductive circuit 24, thereby avoiding the influence of the conductive circuit 24 on the surface morphology of the light-emitting unit 23, and improving the uniformity of the brightness of the display panel 20 and the uniformity of the color deviation under different viewing angles. In addition, the thickness E1 of the area on the side of the insulating layer 22 away from the substrate 21 that does not have the first concave curved surface structure 221 can be in the range of: 3 microns to 5 microns, and the minimum thickness E2 of the area on the side of the insulating layer 22 away from the substrate 21 that has the first concave curved surface structure 221 can be in the range of greater than or equal to 1 micron, wherein the increase in the overall thickness of the insulating layer 22 can facilitate the etching process to obtain the first concave curved surface structure 221, and ensuring a certain thickness in the area on the side of the insulating layer 22 away from the substrate 21 that has the first concave curved surface structure 221 can ensure that there is a distance between the bottom of the first concave curved surface structure 221 and the conductive circuit 24, thereby reducing the electromagnetic crosstalk or leakage generated between the conductive circuit 24 below and the first electrode 231 of the light-emitting unit 23.

[0063] The display panel provided in the embodiment of the present application may be an organic light emitting diode (OLED) display panel. In the plurality of light emitting units 23, the first electrode layer 231 and the second electrode layer 233 may cooperate to drive the light emitting layer 232. The first electrode layer 231 may be an anode, the second electrode layer 233 may be a cathode, and the light emitting layer 232 may be an organic light emitting layer. In addition, a hole injection layer, a hole transport layer, and an electron blocking layer stacked in sequence may be included between the first electrode layer 231 and the light emitting layer 232, and a hole blocking layer, an electron transport layer, and an electron injection layer stacked in sequence may be included between the light emitting layer 232 and the second electrode layer 233. Holes are injected into the light emitting layer 232 from the first electrode layer 231, and electrons are injected into the light emitting layer 232 from the second electrode layer 233. Finally, the holes and electrons recombine in the light emitting layer 232 to generate excitons. When the generated excitons relax from the excited state to the ground state, energy is released to generate photons.

[0064] The light emitted by the curved light-emitting unit provided in the embodiment of the present application is divergent light, which can be collimated by the first light modulation layer. Please refer to Figure 5, which is a schematic diagram of the structure of another display panel including the first light modulation layer provided in the embodiment of the present application. The display panel 20 includes: a substrate 21, an insulating layer 22, and a plurality of light-emitting units 23. Please refer to the embodiment of Figure 2 for details.

[0065] The display panel 20 also includes a first light modulation layer 26, which is located on the side of the light-emitting unit 23 away from the substrate 21. The first light modulation layer 26 includes a stacked first low-refractive layer 261 and a first high-refractive layer 262. The first high-refractive layer 262 is located on the side of the first low-refractive layer 261 away from the substrate 21. The refractive index of the first low-refractive layer 261 is lower than the refractive index of the first high-refractive layer 262. The first low-refractive layer 261 has a plurality of second concave curved surface structures 2611 on the side away from the substrate 21, which are recessed toward the substrate 21. The first high-refractive layer 262 has a plurality of second convex curved surface structures 2621 on the side close to the substrate 21, which are convex toward the substrate 21.

[0066] After the divergent light emitted by the light emitting unit 23 reaches the first light modulation layer 26, the light will be refracted from the first low refractive index layer 261 (optically sparse medium) to the first high refractive index layer 262 (optically dense medium). According to Snell's Law: n1 sinθ1 = n2 sinθ2;

[0067] Because the refractive index of the first low-refractive layer 261 is lower than that of the first high-refractive layer 262, the incident angle θ1 is greater than the refractive angle θ2. Combined with the curved surface of the second concave curved surface structure 2611, light rays are emitted in a direction deflected from the normal after reaching the first light modulation layer 26. This collimates the light rays, effectively improving luminous efficiency and enhancing the brightness of the display panel. The refractive index n1 of the first low-refractive layer 261 can range from 1.45 to 1.55, and the refractive index n2 of the first high-refractive layer 262 can range from 1.65 to 1.85.

[0068] In addition, the second concave curved surface structure 2611 and the second convex curved surface structure 2621 can be complementary structures, and the second convex curved surface structure 2621 is located in the second concave curved surface structure 2611, so as to ensure that the first low-refractive layer 261 and the first high-refractive layer 262 are closely fitted to avoid light loss caused by gaps.

[0069] The orthographic projection of the light-emitting unit 23 on the substrate 21 overlaps with the orthographic projection of the second concave curved surface structure 2611 of the first low-refractive layer 261 on the substrate 21. That is, a portion of the light-emitting unit 23 is directly opposite the second concave curved surface structure 2611 of the first low-refractive layer 261. In this way, part of the light emitted by the light-emitting unit 23 can be collimated by the first light modulation layer 26 to improve the front light extraction efficiency.

[0070] The display panel 20 shown in FIG5 may further include an encapsulation layer 24, which is located on a side of the light-emitting unit 23 away from the substrate 21, and a first light modulation layer 26, which is located on a side of the encapsulation layer 24 away from the light-emitting unit 23. The encapsulation layer 24 may be used to protect the light-emitting unit 23 and prevent external moisture or oxygen from penetrating into the light-emitting unit 23.

[0071] The pixel definition layer 25 is located on the side of the insulating layer 22 away from the substrate 22, in an area that does not have the curved surface structure 221. The pixel definition layer 25 can be used to define the positions of the multiple light-emitting units 23 on the insulating layer 22. The width of each pixel definition layer 25 on the side away from the insulating layer 22 is smaller than the width of the side of the pixel definition layer 25 on the side close to the insulating layer 22. This prevents high-angle light emitted by the light-emitting unit 23 from being blocked by the pixel definition layer 25, allowing more light emitted by the light-emitting unit 23 to reach the next film layer.

[0072] The above describes a case where the first light modulation layer is located on a side of the encapsulation layer away from the light-emitting units. However, the first light modulation layer can also be located within the encapsulation layer. For example, please refer to FIG6 , which is a schematic structural diagram of another display panel provided by an embodiment of the present application in which the first light modulation layer is also located within the encapsulation layer. The display panel 20 includes a substrate 21 , an insulating layer 22 , a plurality of light-emitting units 23 , and a pixel definition layer 25 . For details, please refer to the embodiment of FIG5 .

[0073] The display panel 20 also includes an encapsulation layer 24, which is located on the side of the light-emitting unit 23 away from the substrate 21. The encapsulation layer 24 includes a first inorganic encapsulation layer 241, an organic encapsulation layer 242, and a second inorganic encapsulation layer 243 stacked on the side of the light-emitting unit 23 away from the substrate 21. The encapsulation layer 24 can be used to protect the light-emitting unit 23 and prevent external moisture or oxygen from penetrating into the light-emitting unit 23.

[0074] The first light modulation layer 26 is located between the first inorganic encapsulation layer 241 and the organic encapsulation layer 242. The first light modulation layer 26 includes a first low-refractive layer 261, whose refractive index is lower than that of the organic encapsulation layer 242. The first low-refractive layer 261 has a plurality of second inwardly concave curved surface structures 2611 on a surface facing away from the substrate 21, which are recessed toward the substrate 21. The organic encapsulation layer 242 has a plurality of second outwardly convex curved surface structures 2421 on a surface facing the substrate 21, which are convex toward the substrate 21. The second inwardly concave curved surface structures 2611 and the second outwardly convex curved surface structures 2421 are complementary structures, and the second outwardly convex curved surface structures 2421 are located within the second inwardly concave curved surface structures 2611.

[0075] After emitting from the light-emitting layer 232, light passes through multiple organic and inorganic dielectric surfaces with different refractive indices, resulting in various modes of light loss, such as metal loss and surface plasmon loss caused by metal electrodes, waveguide mode loss caused by transparent electrodes, and cover mode loss caused by the cover. By positioning the first light modulation layer 26 between the first inorganic encapsulation layer 241 and the organic encapsulation layer 242, the distance between the first light modulation layer 26 and the light-emitting unit 23 can be reduced. This allows the light emitted by the light-emitting unit 23 to be collimated by the first light modulation layer 26 at a shorter optical path and incident on the film layer of the first light modulation layer 26 away from the substrate 21. This improves brightness uniformity and color uniformity at different viewing angles.

[0076] In addition, the difference between the refractive index of the first low-refractive layer 261 and the refractive index of the organic encapsulation layer 242 can be greater than 0.1. The refractive index of the first low-refractive layer 261 is less than the refractive index of the organic encapsulation layer 242. Combined with the curved surface morphology of the second concave curved surface structure 2611, light can be refracted in a direction biased toward the normal, that is, the light can be collimated. The difference between the refractive index of the first low-refractive layer 261 and the refractive index of the organic encapsulation layer 242 is small. This can avoid light loss caused by the excessive refractive index of the organic encapsulation layer 242, thereby effectively improving the front light extraction efficiency and enhancing the brightness of the display panel. For example, the refractive index of the first low-refractive layer 261 can range from 1.45 to 1.55, and the refractive index of the organic encapsulation layer 242 can range from 1.65 to 1.85. In this way, the refractive index of the first low-refractive layer 261 is less than the refractive index of the organic encapsulation layer 242, and the refractive index difference is small.

[0077] The display panel provided in the embodiment of the present application may also include a second light modulation layer to further collimate the divergent light emitted by the light-emitting unit. For example, please refer to Figure 7, which is a schematic structural diagram of another display panel including a second light modulation layer provided in the embodiment of the present application. The display panel 20 includes: a substrate 21, an insulating layer 22, a plurality of light-emitting units 23, an encapsulation layer 24, a pixel definition layer 25, and a first light modulation layer 26. Please refer to the embodiment of Figure 6 for details.

[0078] The display panel 20 also includes a second light modulation layer 27, which is located on a side of the encapsulation layer 24 away from the substrate 21. The second light modulation layer 27 includes a second high-refractive layer 272 and a second low-refractive layer 271, which are stacked. The refractive index of the second low-refractive layer 271 is lower than the refractive index of the second high-refractive layer 272. The second low-refractive layer 271 has a plurality of third concave curved surface structures 2711 on a surface close to the bottom of the substrate 21, which are recessed away from the substrate 21. The second high-refractive layer 272 has a plurality of third convex curved surface structures 2721 on a surface away from the substrate 21, which are convex away from the substrate 21.

[0079] According to Snell's law, since the refractive index of the second low-refractive layer 271 is lower than that of the second high-refractive layer 272 , the incident angle is lower than the refractive angle. Combined with the curved surface morphology of the third convex curved surface structure 2721 , light rays will be emitted in a direction deviating from the normal after reaching the second light modulation layer 27 . That is, some light rays can be collimated by the second light modulation layer 27 , thereby improving the front light extraction efficiency.

[0080] The third concave curved surface structure 2711 and the third convex curved surface structure 2721 can be complementary structures, and the third convex curved surface structure 2721 is located in the third concave curved surface structure 2711, so as to ensure that the second low-refractive layer 271 and the second high-refractive layer 272 are closely fitted to avoid light loss caused by gaps.

[0081] The orthographic projection of the light-emitting unit 23 on the substrate 21 overlaps with the orthographic projection of the third concave curved surface structure 2711 of the second low-refractive layer 271 on the substrate 21. That is, a portion of the light-emitting unit 23 directly faces the third concave curved surface structure 2711 of the second low-refractive layer 271. This ensures that part of the light emitted by the light-emitting unit 23 is collimated by the second light modulation layer 27.

[0082] Optionally, the orthographic projection of the third concave curved surface structure 2711 of the second low-refractive layer 27 on the substrate 21 overlaps with the orthographic projection of the second concave curved surface structure 2611 of the first low-refractive layer 261 on the substrate 21. That is, the second concave curved surface structure 2611 and the third concave curved surface structure 2711 are equal in size. In addition, the curvature of the second concave curved surface structure 2611 and the third concave curved surface structure 2711 can be the same, but this application is not limited to this.

[0083] Optionally, the pixel definition layer 25 includes a reflective material, or the first inorganic encapsulation layer 241 covers the pixel definition layer 25 and the refractive index of the pixel definition layer 25 is lower than the refractive index of the first inorganic encapsulation layer 241. Some of the large-angle light emitted by the light-emitting unit 23 hits the surface of the pixel definition layer 25. When the pixel definition layer 25 includes a reflective material, this part of the light can be reflected by the pixel definition layer 25. In addition, there is a total reflection angle when light is emitted from a high-refractive-index material to a low-refractive-index material. When the light exceeds this angle, total reflection occurs. The greater the refractive index difference, the smaller the total reflection angle, and the more light is totally reflected. Therefore, the refractive index of the pixel definition layer 25 is lower than the refractive index of the first inorganic encapsulation layer 241, so that some of the light hitting the surface of the pixel definition layer 25 can be reflected by the pixel definition layer 25. The reflected light can reach the second light modulation layer 27 and be refracted in a direction deviating from the normal, that is, the reflected light can be collimated by the second light modulation layer 27, thereby improving the front light output efficiency. Among them, the refractive index of the first inorganic encapsulation layer 241 can be in the range of: 1.7-1.85, and the refractive index of the pixel definition layer 25 can be in the range of: 1.4-1.55. The difference between the refractive index of the first inorganic encapsulation layer 241 and the refractive index of the pixel definition layer 25 is greater than or equal to 0.3, so that the total reflection angle can be smaller, and more light can be totally reflected by the pixel definition layer 25.

[0084] Optionally, the orthographic projection of the light-emitting unit 23 on the substrate 21 is located in the orthographic projection of the third concave curved surface structure 2711 on the substrate 21, and there is a distance between the orthographic projection of the edge of the light-emitting unit 23 on the substrate 21 and the orthographic projection of the edge of the curved surface structure 221 on the substrate 21, that is, the entire area of ​​the light-emitting unit 23 is opposite to the third concave curved surface structure 2711, and the maximum width of the third concave curved surface structure 2711 is greater than the light-emitting unit, so as to ensure that the third concave curved surface structure 2711 collects more light reflected by the pixel definition layer 25.

[0085] Optionally, for the display panels shown in Figures 5 to 7, the orthographic projection of the light-emitting unit 23 on the substrate 21 may also be located within the orthographic projection of the second inwardly concave curved surface structure 2611 of the first low-refractive layer 261 on the substrate 21, and a distance may be present between the orthographic projection of the edge of the light-emitting unit 23 on the substrate 21 and the orthographic projection of the edge of the second inwardly concave curved surface structure 2611 on the substrate 21. In this way, the entire area of ​​the light-emitting unit 23 can be directly opposite the second inwardly concave curved surface structure 2611 of the first low-refractive layer 261, and the maximum width v2 of the second inwardly concave curved surface structure 2611 of the first low-refractive layer 261 is greater than the maximum width of the light-emitting unit 23, thereby further allowing more light emitted by the light-emitting unit 23 to be collimated by the first light modulation layer 26.

[0086] The maximum width v2 of the second concave curved surface structure 2611 of the first low-refractive layer 261 can be equal to the maximum distance between the adjacent pixel definition layer 25 and the side away from the substrate 21, but this embodiment of the present application is not limited to this. In addition, the light-emitting unit 23, the second concave curved surface structure 2611, and the third concave curved surface structure 2711 can have the same curvature, but this embodiment of the present application is not limited to this.

[0087] Optionally, the display panels shown in Figures 5 to 7 can satisfy the following: h1 / v1≤h2 / v2<0.5. Please refer to Figure 8, which is a schematic diagram of a partial structure of another display panel provided in an embodiment of the present application, wherein h1 is the maximum height difference between the area having the curved surface structure 221 and the area without the curved surface structure 221 on the side of the insulating layer 22 away from the substrate 21 in the first direction X perpendicular to the substrate 21. Specifically, for the case where the curved surface structure 221 is a first convex curved surface structure, h1 is the distance between the top of the first convex curved surface structure and the area of ​​the insulating layer 22 without the curved surface structure 221 in the first direction X; for the case where the curved surface structure 221 is a first concave curved surface structure, h1 is the distance between the bottom of the first concave curved surface structure and the area of ​​the insulating layer 22 without the curved surface structure 221 in the first direction X. v1 is the maximum width of the curved surface structure 221 of the insulating layer 22 in a direction parallel to the substrate 21, h2 is the maximum height difference in the first direction X between the area having the second concave curved surface structure 2611 and the area not having the second concave curved surface structure 2611 on the side of the first low-refractive layer 261 away from the substrate 21, and v2 is the maximum width of the second concave curved surface structure 2611 of the first low-refractive layer 261 in a direction parallel to the substrate 21.

[0088] By limiting the aspect ratio h1 / v1 of the curved structure 221, the problem of color mixing that is easily caused when the difference between h1 and v1 is large can be avoided. Please refer to Figure 9, which is a schematic diagram of a portion of the structure of another display panel provided in an embodiment of the present application, wherein the difference between h1 and v1 is large. When the human eye is at a height higher than the display panel d, the color mixing crosstalk generated by two adjacent light-emitting units 23 of different colors can be observed at a larger viewing angle, which may cause the color deviation to worsen, thereby affecting the display effect of the display panel. Exemplarily, the range of h1 can be: 0 microns < h1 < 2 microns. When h1 is greater than 0 microns, it can be ensured that the insulating layer 22 includes the curved structure 221; when h1 is less than two microns, please refer to Figure 7, which can avoid observing color mixing crosstalk at a larger viewing angle.

[0089] In addition, by limiting the aspect ratio h2 / v2 of the second concave curved surface structure 2611 of the first low-refractive layer 261 to be greater than or equal to the aspect ratio h1 / v1 of the curved surface structure 221, it is possible to ensure that the second concave curved surface structure 2611 collects more divergent light emitted by the light-emitting unit 23. For example, in the display panels shown in Figures 4 to 6, the aspect ratio h2 / v2 of the second concave curved surface structure 2611 is equal to the aspect ratio h1 / v1 of the curved surface structure 221, and the curvature is equal. This further ensures that the second concave curved surface structure 2611 collimates the divergent light emitted by the light-emitting unit 23.

[0090] Optionally, the display panels shown in Figures 5 to 7 can satisfy: H<D=tan(v1 / 2h1)*(g+v1) / 2, please refer to Figure 8, H is the minimum distance between the second concave curved surface structure 2611 of the first low-refractive layer 261 and the light-emitting unit 23 in the first direction X, D is the minimum distance between the mixing point and the pixel definition layer 25 in the first direction X, and the mixing point is the point where the light emitted by two adjacent light-emitting units 23 in the multiple light-emitting units 23 that does not illuminate the pixel definition layer 25 intersects. In fact, there are multiple mixing points, such as mixing point B1 and mixing point B2, where mixing point B1 is the mixing point closest to the pixel definition layer 25, and the distance between the mixing point B1 and the pixel definition layer 25 in the first direction X is the minimum distance D between the mixing point and the pixel definition layer 25 in the first direction X. h1 is the maximum height difference in the first direction X between the area having the curved surface structure 221 and the area without the curved surface structure 221 on the side of the insulating layer 22 away from the substrate 21, v1 is the maximum width of the curved surface structure of the insulating layer in the direction parallel to the substrate, and g is the distance between two adjacent light-emitting units in the direction parallel to the substrate.

[0091] By setting the minimum distance H between the second concave curved surface structure 2611 and the light-emitting unit 23 in the first direction X to be smaller than the minimum distance D between the mixing point and the pixel definition layer 25 in the first direction X, the height of the second concave curved surface structure 2611 can be made lower than the height of the mixing point B1 closest to the pixel definition layer 25. The first light modulation layer 26 can then collimate the light before color mixing occurs, thereby preventing the light from two adjacent light-emitting units 23 from mixing and affecting the display effect of the display panel 20.

[0092] Based on the display panel shown in Figure 7, the present application provides another display panel with other functional layers. Please refer to Figure 10. Figure 10 is a structural schematic diagram of another display panel with other functional layers provided in an embodiment of the present application. The display panel 20 includes: a substrate 21, an insulating layer 22, a plurality of light-emitting units 23, an encapsulation layer 24, a pixel definition layer 25, a first light modulation layer 26 and a second light modulation layer 27. Please refer to the embodiment of Figure 7 for details.

[0093] The display panel 20 further includes other functional layers: a buffer layer 281 , a polysilicon layer 282 , a gate 283 , a source / drain 284 , a touch layer 285 , a polarization structure layer 286 and a cover plate 287 .

[0094] The buffer layer 281 is located on the side of the substrate 21 near the insulating layer 22. This layer prevents water and oxygen from corroding the conductive circuits and also smoothes the display panel surface. The polysilicon layer 282 is located on the side of the buffer layer 281 away from the substrate 21. The gate 283 and source / drain electrodes 284 are located on the side of the polysilicon layer 282 away from the buffer layer 281. The source / drain electrodes 284 are electrically connected to the first electrode layer 231 and the gate 283, respectively, to transmit electrical signals to the first electrode layer 231.

[0095] The touch layer 285 is located between the second inorganic encapsulation layer 243 and the second high-refractive layer 272. The touch layer 285 may be an integrated touch layer, which allows the touch layer 285 to be integrated with other film layers, thereby enabling the display panel to be thinner and lighter while providing the display panel with a touch function.

[0096] The polarization structure layer 286 is located on the side of the second low-refractive layer 271 away from the second high-refractive layer 272. The polarization structure layer 286 can reduce the reflectivity of ambient light, ensure the contrast of the display panel under different external environments, and reduce its reflection of ambient light to achieve a better display effect. The polarization structure layer 286 can include a polarizer 2861 and a quarter-wave plate 2862. Please refer to Figure 11, which is a schematic diagram of the principle of a polarization structure layer provided in an embodiment of the present application. Ambient light C1 is converted into linear polarization C2 by the polarizer 2861, and then converted into circular polarization C3 by the quarter-wave plate 2862. After reflection from the first electrode layer 231, the vector component of the circular polarization C3 produces half-wave loss, and the rotation direction of the synthesized circular polarization C3' is deflected. After passing through the quarter-wave plate 2862, a reflected linear polarization C2' is generated perpendicular to the incident linear polarization C2. Because the polarization direction is different from that of the polarizer 2861, the reflected light is confined to the display panel, reducing the reflectivity of the ambient light.

[0097] The cover plate 287 is located on a side of the polarization structure layer 286 away from the second low-refractive layer 271 , and the cover plate 287 may include a glass cover plate.

[0098] The embodiments of the present application can be applied to light-emitting units of various shapes and arrangements. For example, the shape of the light-emitting unit provided in the embodiments of the present application can be a circle, a quadrilateral or a hexagon with a curved structure, etc. Please refer to Figures 12 to 15. Figure 12 is a schematic diagram of the top-down structure of a circular light-emitting unit with a curved structure, Figure 13 is a schematic diagram of the top-down structure of a square light-emitting unit with a curved structure, Figure 14 is a schematic diagram of the top-down structure of a rectangular light-emitting unit with a curved structure, and Figure 15 is a schematic diagram of the top-down structure of a hexagonal light-emitting unit with a curved structure. The light-emitting units 23 in Figures 12 to 15 can all have a curved structure, which can be at least one of a convex curved structure and a concave curved structure. Compared with a planar light-emitting unit, the curved light-emitting unit 23 has a larger light-emitting area, which improves the brightness, solves the problem of poor brightness of the display panel in the related art, and achieves the effect of improving the brightness of the display panel. In addition, the curved light-emitting unit provided in the embodiment of the present application can be applied to a diamond-like pixel arrangement, a GGRB pixel arrangement, a real RGB pixel arrangement, etc.

[0099] In addition to being applicable to the display field of pixel structures, the curved light-emitting unit structure provided in the embodiments of the present application can also be applied to the lighting field for improving the brightness of light at different angles, such as automobile headlights and other fields. The curved light-emitting unit significantly improves the brightness at all viewing angles.

[0100] In summary, an embodiment of the present application provides a display panel including a substrate, an insulating layer and a plurality of light-emitting units, wherein a side of the insulating layer away from the substrate has a plurality of curved structures, and the plurality of light-emitting units are respectively located on the plurality of curved structures. Under such a structure, the electrodes and the light-emitting layer in the light-emitting units located on the curved structures can be curved, and the electrodes can drive the curved light-emitting layer to emit light. Compared with the planar light-emitting units, the curved light-emitting units have a larger light-emitting area, which improves the brightness, solves the problem of poor brightness of the display panel in the related art, and achieves the effect of improving the brightness of the display panel.

[0101] Furthermore, if the curved surface structure of the insulating layer is convex, the distance between the light-emitting unit and the conductive circuit can be increased. If the curved surface structure of the insulating layer is concave, the concave curved surface structure can be produced by etching a flat insulating layer, so the bottom morphology of the concave curved surface structure is not affected by the conductive circuit. Therefore, both cases can prevent the conductive circuit from affecting the surface uniformity of the light-emitting unit, thereby improving the brightness uniformity of the display panel and the uniformity of color shift at different viewing angles.

[0102] In addition, embodiments of the present application further provide a display device, comprising a housing and any one of the display panels provided in the above embodiments, wherein the display panel may be located within the housing. The display device may be any device including a display function, such as a monitor, a television, a stand-up advertising machine, a picture screen device, a mobile phone, or various smart wearable devices.

[0103] Since the display device includes the display panel provided by the above embodiment, the display device can also have a similar effect, that is, the brightness and front light extraction efficiency of the display device can be improved.

[0104] The term "at least one of A and B" in this application is merely a description of the association relationship between associated objects, indicating that three relationships may exist. For example, at least one of A and B may represent three situations: A exists alone, A and B exist at the same time, and B exists alone.

[0105] It should be noted that in the accompanying drawings, the sizes of layers and parts may be exaggerated for clarity of illustration. It is also understood that when an element or layer is referred to as being "on" another element or layer, it can be directly on the other element, or there can be an intermediate layer. In addition, it is understood that when an element or layer is referred to as being "under" another element or layer, it can be directly under the other element, or there can be more than one intermediate layer or element. In addition, it is also understood that when a layer or element is referred to as being "between" two layers or elements, it can be the only layer between the two layers or elements, or there can be more than one intermediate layer or element. Similar reference numerals throughout the text indicate similar elements.

[0106] In this application, the terms "first", "second" and "third" are used for descriptive purposes only and should not be understood as indicating or implying relative importance. The term "plurality" refers to two or more than two, unless expressly limited otherwise.

[0107] The above description is merely an optional embodiment of the present application and is not intended to limit the present application. Any modifications, equivalent replacements, improvements, etc. made within the spirit and principles of the present application shall be included in the scope of protection of the present application.

Claims

1. A display panel, characterized in that: The display panel comprises: substrate; An insulating layer, the insulating layer being located on the substrate, and a side of the insulating layer away from the substrate having a plurality of curved surface structures; A plurality of light-emitting units are respectively located on the plurality of curved structures, the light-emitting units include a first electrode layer, a light-emitting layer and a second electrode layer, the first electrode layer is located on the curved structure, the light-emitting layer is located on a side of the first electrode layer away from the curved structure, and the second electrode is located on a side of the light-emitting layer away from the curved structure.

2. The display panel according to claim 1, characterized in that: The plurality of curved surface structures include at least one of a first convex curved surface structure convex in a direction away from the substrate and a first concave curved surface structure concave in a direction close to the substrate.

3. The display panel according to claim 2, characterized in that: The display panel further includes a first light modulation layer, the first light modulation layer is located on a side of the light emitting unit away from the substrate, the first light modulation layer includes a stacked first low refractive layer and a first high refractive layer, the first high refractive layer is located on a side of the first low refractive layer away from the substrate, and the refractive index of the first low refractive layer is less than the refractive index of the first high refractive layer; The first low-refractive layer has a plurality of second inwardly concave curved surface structures on a side away from the substrate and concave toward the substrate, and the first high-refractive layer has a plurality of second outwardly convex curved surface structures on a side close to the substrate and convex toward the substrate, wherein the second inwardly concave curved surface structures and the second outwardly convex curved surface structures are complementary structures, and the second outwardly convex curved surface structures are located in the second inwardly concave curved surface structures; The orthographic projection of the light-emitting unit on the substrate overlaps with the orthographic projection of the second concave curved surface structure of the first low-refractive layer on the substrate.

4. The display panel according to claim 3, characterized in that: The display panel further includes an encapsulation layer, wherein the encapsulation layer is located on a side of the light emitting unit away from the substrate, and the first light modulation layer is located on a side of the encapsulation layer away from the light emitting unit.

5. The display panel according to claim 3, characterized in that: The display panel further includes an encapsulation layer, the encapsulation layer including a first inorganic encapsulation layer, an organic encapsulation layer and a second inorganic encapsulation layer stacked on a side of the light-emitting unit away from the substrate, the first light modulation layer is located between the first inorganic encapsulation layer and the organic encapsulation layer, the first light modulation layer includes a first low-refractive layer, and the refractive index of the first low-refractive layer is less than the refractive index of the organic encapsulation layer; A side of the first low-refractive layer away from the substrate has a plurality of second concave curved surface structures recessed in a direction approaching the substrate, and a side of the organic encapsulation layer close to the substrate has a plurality of second convex curved surface structures convex in a direction approaching the substrate, the second concave curved surface structure and the second convex curved surface structure are complementary structures, and the second convex curved surface structure is located in the second concave curved surface structure.

6. The display panel according to claim 5, characterized in that: The display panel further includes a second light modulation layer, the second light modulation layer is located on a side of the encapsulation layer away from the substrate, the second light modulation layer includes a second high refractive layer and a second low refractive layer stacked, and the refractive index of the second low refractive layer is less than the refractive index of the second high refractive layer; The second low-refractive layer has a plurality of third inwardly concave curved surface structures on a side close to the substrate and away from the substrate, and the second high-refractive layer has a plurality of third outwardly convex curved surface structures on a side away from the substrate and away from the substrate, wherein the third inwardly concave curved surface structures and the third outwardly convex curved surface structures are complementary structures, and the third outwardly convex curved surface structures are located in the third inwardly concave curved surface structures; The orthographic projection of the light emitting unit on the substrate overlaps with the orthographic projection of the third concave curved surface structure of the second low-refractive layer on the substrate.

7. The display panel according to claim 6, characterized in that: The orthographic projection of the third concave curved surface structure of the second low-refractive layer on the substrate overlaps with the orthographic projection of the second concave curved surface structure of the first low-refractive layer on the substrate.

8. The display panel according to claim 6, characterized in that: The display panel further comprises a pixel definition layer, wherein the pixel definition layer is located on a region of the insulating layer that is away from the substrate and does not have the curved surface structure; The pixel definition layer includes a reflective material, or the first inorganic encapsulation layer covers the pixel definition layer and a refractive index of the pixel definition layer is smaller than a refractive index of the first inorganic encapsulation layer.

9. The display panel according to any one of claims 3 to 6, characterized in that: The orthographic projection of the light emitting unit on the substrate is located in the orthographic projection of the second concave curved surface structure on the substrate, and the orthographic projection of the edge of the light emitting unit on the substrate is spaced from the orthographic projection of the edge of the second concave curved surface structure on the substrate.

10. The display panel according to any one of claims 3 to 6, characterized in that: The display panel satisfies: h1 / v1≤h2 / v2<0.5; Among them, h1 is the maximum height difference between the area having the curved surface structure and the area not having the curved surface structure on the side of the insulating layer away from the substrate in the first direction perpendicular to the substrate, v1 is the maximum width of the curved surface structure of the insulating layer in the direction parallel to the substrate, h2 is the maximum height difference between the area having the second concave curved surface structure and the area not having the second concave curved surface structure on the side of the first low-refractive layer away from the substrate in the first direction, and v2 is the maximum width of the second concave curved surface structure of the first low-refractive layer in the direction parallel to the substrate.

11. The display panel according to any one of claims 3 to 6, characterized in that: The display panel further comprises a pixel definition layer, wherein the pixel definition layer is located on a side of the insulating layer away from the substrate, and the pixel definition layer is located between the plurality of curved surface structures; The display panel satisfies: H<D=tan(v1 / 2h1)*(g+v1) / 2, H is the minimum distance between the second concave curved surface structure of the first low-refractive layer and the light-emitting unit in the first direction perpendicular to the substrate, D is the minimum distance between the mixing point and the pixel definition layer in the first direction, the mixing point is the point where the light rays emitted by two adjacent light-emitting units among the multiple light-emitting units and not irradiated on the pixel definition layer intersect, h1 is the maximum height difference in the first direction between the area having the curved surface structure and the area not having the curved surface structure on the side of the insulating layer away from the substrate, v1 is the maximum width of the curved surface structure of the insulating layer in the direction parallel to the substrate, and g is the distance between two adjacent light-emitting units in the direction parallel to the substrate.

12. The display panel according to claim 2, characterized in that: The insulating layer has a surface away from the substrate having a plurality of first concave curved surface structures that are concave toward a direction close to the substrate; The thickness of the region of the insulating layer away from the substrate without the curved surface structure is in the range of 3 micrometers to 5 micrometers, and the thickness of the region of the insulating layer away from the substrate with the curved surface structure is greater than or equal to 1 micrometer.

13. The display panel according to claim 1, characterized in that: The maximum height difference between a region having the curved surface structure and a region not having the curved surface structure on a side of the insulating layer away from the substrate in a first direction perpendicular to the substrate is greater than 0 micrometers and less than or equal to 2 micrometers.

14. The display panel according to claim 1, characterized in that: The display panel further includes a conductive circuit, the conductive circuit is located on the substrate, the insulating layer covers the conductive circuit, and the orthographic projection of the curved surface structure on the substrate overlaps with the orthographic projection of the conductive circuit on the substrate.

15. A display device, characterized in that: The display device comprises a housing and a display panel according to any one of claims 1 to 14, wherein the display panel is located in the housing.

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