Display panel and display device

Abstract

The application discloses a display panel and a display device. The display panel comprises a first display area and a second display area, the first display area at least partially surrounds the second display area, the first display area comprises a first light adjusting structure, the first light adjusting structure comprises a first light adjusting layer and a second light adjusting layer, the refractive index of the second light adjusting layer is greater than the refractive index of the first light adjusting layer; the second display area comprises a second light adjusting structure, the second light adjusting structure comprises a third light adjusting layer and a fourth light adjusting layer, the refractive index of the fourth light adjusting layer is greater than the refractive index of the third light adjusting layer, along the vertical light-emitting direction of the display panel, the thickness of the first light adjusting layer is less than the thickness of the third light adjusting layer, so that more large-angle light can be received by the third light adjusting layer, and the light-emitting angle is adjusted, the normal viewing angle light-emitting efficiency of the second display area is improved, and the overall service life of the display panel is ensured.

Description

Technical Field

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

[0002] With the rapid development of terminal devices, more and more electronic devices with display functions are widely used in people's daily life and work, bringing great convenience to people's daily life and work, and becoming an indispensable tool for people today.

[0003] Electronic devices equipped with under-screen camera technology have gradually become a key trend. The area where the screen camera is located is a light-transmitting and displayable screen, but there are differences in display and service life between the area where the screen camera is located and the normal display area, which reduces the user experience. Summary of the Invention

[0004] The present invention provides a display panel and a display device to improve the light extraction efficiency of a second display area and increase the service life.

[0005] In a first aspect, the present invention provides a display panel, comprising a first display area and a second display area, wherein the first display area at least partially surrounds the second display area;

[0006] The display panel includes:

[0007] substrate;

[0008] A plurality of light-emitting elements are located on one side of the base substrate;

[0009] a first light adjustment structure located in the first display area and on a side of the light-emitting element away from the base substrate, the first light adjustment structure comprising a first light adjustment layer and a second light adjustment layer, the second light adjustment layer having a greater refractive index than the first light adjustment layer; the first light adjustment layer comprising a first opening, the first opening at least partially overlapping the light-emitting element;

[0010] a second light adjustment structure located in the second display area and on a side of the light-emitting element away from the base substrate, the second light adjustment structure comprising a third light adjustment layer and a fourth light adjustment layer, the fourth light adjustment layer having a greater refractive index than the third light adjustment layer; the third light adjustment layer comprising a second opening, the second opening at least partially overlapping the light-emitting element;

[0011] Along a first direction, the thickness of the first light adjustment layer is smaller than the thickness of the third light adjustment layer, wherein the first direction is a vertical light emission direction of the display panel.

[0012] In a second aspect, the present invention provides a display device comprising the display panel according to any one of the first aspects.

[0013] According to the technical solution of the embodiment of the present invention, the display panel includes a first display area and a second display area, the first display area at least partially surrounds the second display area, the first display area includes a first light adjustment structure, the first light adjustment structure includes a first light adjustment layer and a second light adjustment layer, the refractive index of the second light adjustment layer is greater than the refractive index of the first light adjustment layer; the second display area includes a second light adjustment structure, the second light adjustment structure includes a third light adjustment layer and a fourth light adjustment layer, the refractive index of the fourth light adjustment layer is greater than the refractive index of the third light adjustment layer, along the vertical light output direction of the display panel, the thickness of the first light adjustment layer is adjusted to be less than the thickness of the third light adjustment layer, so that the third light adjustment layer can receive more light at a larger angle and adjust its light output angle, thereby improving the light output brightness of the second display area at a normal viewing angle and ensuring the use effect of the display panel.

[0014] It should be understood that the content described in this section is not intended to identify the key or important features of the embodiments of the present invention, nor is it intended to limit the scope of the present invention. Other features of the present invention will become readily understood through the following description. BRIEF DESCRIPTION OF THE DRAWINGS

[0015] In order to more clearly illustrate the technical solutions in the embodiments of the present invention, the following briefly introduces the drawings required for use in the description of the embodiments. Obviously, the drawings described below are only some embodiments of the present invention. For ordinary technicians in this field, other drawings can be obtained based on these drawings without creative work.

[0016] Figure 1 A schematic structural diagram of a display panel provided by an embodiment of the present invention;

[0017] Figure 2 for Figure 1 Schematic diagram of the cross-sectional structure along the middle line A-A';

[0018] Figure 3 A schematic structural diagram of another display panel provided by an embodiment of the present invention;

[0019] Figure 4 A schematic structural diagram of another display panel provided by an embodiment of the present invention;

[0020] Figure 5 A schematic structural diagram of another display panel provided by an embodiment of the present invention;

[0021] Figure 6 A schematic structural diagram of another display panel provided by an embodiment of the present invention;

[0022] Figure 7 A schematic structural diagram of another display panel provided by an embodiment of the present invention;

[0023] Figure 8 A schematic structural diagram of another display panel provided by an embodiment of the present invention;

[0024] Figure 9 A schematic structural diagram of another display panel provided by an embodiment of the present invention;

[0025] Figure 10 A schematic structural diagram of a second display area provided by an embodiment of the present invention;

[0026] Figure 11 A schematic structural diagram of another display panel provided by an embodiment of the present invention;

[0027] Figure 12 A schematic structural diagram of another display panel provided by an embodiment of the present invention;

[0028] Figure 13 A schematic structural diagram of another display panel provided by an embodiment of the present invention;

[0029] Figure 14 A schematic structural diagram of a display device provided by an embodiment of the present invention. DETAILED DESCRIPTION

[0030] In order to enable those skilled in the art to better understand the solutions of the present invention, the technical solutions in the embodiments of the present invention will be clearly and completely described below in conjunction with the drawings in the embodiments of the present invention. Obviously, the embodiments described are only part of the embodiments of the present invention, not all of the embodiments. Based on the embodiments of the present invention, all other embodiments obtained by ordinary technicians in this field without making creative efforts should fall within the scope of protection of the present invention.

[0031] In view of the problem in the background art that the area where the screen camera is located and the normal display area of ​​the display panel have different display and service life, an embodiment of the present invention provides a display panel, comprising a first display area and a second display area, wherein the first display area at least partially surrounds the second display area; the display panel comprises: a base substrate; a plurality of light-emitting elements located on one side of the base substrate; a first light adjustment structure located in the first display area and on a side of the light-emitting elements away from the base substrate, the first light adjustment structure comprising a first light adjustment layer and a second light adjustment layer, the refractive index of the second light adjustment layer being greater than the refractive index of the first light adjustment layer; the first light adjustment layer comprising a first opening, the first opening at least partially overlapping with the light-emitting elements; a second light adjustment structure located in the second display area and on a side of the light-emitting elements away from the base substrate, the second light adjustment structure comprising a third light adjustment layer and a fourth light adjustment layer, the refractive index of the fourth light adjustment layer being greater than the refractive index of the third light adjustment layer; the third light adjustment layer comprising a second opening, the second opening at least partially overlapping with the light-emitting elements; and a thickness of the first light adjustment layer being less than a thickness of the third light adjustment layer along a first direction, wherein the first direction is a direction perpendicular to the light emission of the display panel.

[0032] By differentially designing the first light adjustment structure in the first display area and the second light adjustment structure in the second display area, the thickness of the first light adjustment layer in the first light adjustment structure is smaller than the thickness of the third light adjustment layer in the second light adjustment structure along the vertical light output direction of the display panel. This allows the third light adjustment layer to receive more light at larger angles and adjust the large-angle light so that it is emitted in the normal viewing direction, thereby improving the light output efficiency of the second display area and extending the overall service life of the display panel.

[0033] The above technical solution is the core idea of ​​the present invention. The technical solution in the embodiment of the present invention will be clearly and completely described below in conjunction with the accompanying drawings in the embodiment of the present invention. Based on the embodiment of the present invention, all other embodiments obtained by ordinary technicians in this field without making any creative work shall fall within the scope of protection of the embodiment of the present invention.

[0034] Figure 1 A schematic structural diagram of a display panel provided by an embodiment of the present invention is shown in FIG. Figure 2 for Figure 2 The cross-sectional structure diagram along the middle line A-A' is as follows: Figure 1 and Figure 2As shown, the display panel 100 includes a first display area 101 and a second display area 102, wherein the first display area 101 at least partially surrounds the second display area 102; the display panel 100 includes: a base substrate 103; a plurality of light emitting elements 104, located on one side of the base substrate 103; a first light adjustment structure 105, located in the first display area 101 and on a side of the light emitting element 104 away from the base substrate 103, the first light adjustment structure 105 includes a first light adjustment layer 1051 and a second light adjustment layer 1052, wherein the refractive index of the second light adjustment layer 1052 is greater than the refractive index of the first light adjustment layer 1051; the first light adjustment layer 1051 includes a first opening 106, and the first opening 106 is adjacent to the light emitting element 104. The light emitting element 104 at least partially overlaps with the light emitting element 104. The second light adjustment structure 107 is located in the second display area 102 and on the side of the light emitting element 104 away from the base substrate 103. The second light adjustment structure 107 includes a third light adjustment layer 1071 and a fourth light adjustment layer 1072. The refractive index of the fourth light adjustment layer 1072 is greater than the refractive index of the third light adjustment layer 1071. The third light adjustment layer 1071 includes a second opening 108, which at least partially overlaps with the light emitting element 104. Along a first direction (the X direction as shown in the figure), the thickness of the first light adjustment layer 1051 is less than the thickness of the third light adjustment layer 1071, wherein the first direction is perpendicular to the light emission direction of the display panel 100.

[0035] The first display area 101 is the normal display area of ​​the display panel 100, and the second display area 102 is the screen camera area, which can realize both display and light sensing elements such as cameras, light sensors, and fingerprint sensors to realize light sensing, thereby realizing imaging and fingerprint recognition functions. The display panel 100 includes a substrate 103, which can be a flexible substrate or a rigid substrate. The specific material of the substrate 103 can be selected according to actual design requirements and is not specifically limited in the embodiment of the present invention. The first display area 101 and the second display area 102 of the display panel 100 are both provided with a plurality of light-emitting elements 104 located on one side of the substrate 103. The light-emitting elements 104 can include light-emitting elements of the same color or the plurality of light-emitting elements can include red light-emitting elements, green light-emitting elements, and blue light-emitting elements to realize color display. The specific arrangement of the light-emitting elements 104 can be selected according to actual design requirements and is not specifically limited in the embodiment of the present invention. The light-adjusting structure is provided on the side of the light-emitting element 104 away from the substrate 103 to adjust the emission angle of the light emitted by the light-emitting element 104 to meet different display requirements. In the present application, a first light adjustment structure 105 is provided corresponding to the first display area 101. The first light adjustment structure 105 includes a first light adjustment layer 1051 and a second light adjustment layer 1052 arranged in sequence along a first direction X. The first light adjustment layer 1051 includes a first opening 106 that at least partially overlaps with the light-emitting element 104. The second light adjustment layer 1052 fills the first opening 106, allowing light emitted from the light-emitting element 104 at a normal viewing angle to be directly emitted. At the same time, the refractive index of the second light adjustment layer 1052 is adjusted to be greater than the refractive index of the first light adjustment layer 1051. The high-angle light emitted by the light-emitting element 104 is incident on the first light adjustment layer 1051 through the second light adjustment layer 1052. From the optically denser medium to the optically less dense medium, some of the light is totally reflected at the interface between the first light adjustment layer 1051 and the second light adjustment layer 1052, and then emitted in the normal viewing direction, thereby ensuring light extraction efficiency at the normal viewing angle.A second light adjustment structure 107 is also provided corresponding to the second display area 102. The second light adjustment structure 107 includes a third light adjustment layer 1071 and a fourth light adjustment layer 1072. The third light adjustment layer 1071 includes a second opening 108 that at least partially overlaps with the light-emitting element 104. The fourth light adjustment layer 1072 fills the second opening 108, allowing light emitted from the light-emitting element 104 at a normal viewing angle to be directly emitted. At the same time, the refractive index of the fourth light adjustment layer 1072 is adjusted to be greater than the refractive index of the third light adjustment layer 1071. Light emitted from the light-emitting element 104 at a large angle is incident on the third light adjustment layer 1071 through the fourth light adjustment layer 1072. From the optically denser medium to the optically less dense medium, some of the light is totally reflected at the interface between the third light adjustment layer 1071 and the fourth light adjustment layer 1072, and then emitted in the normal viewing direction, thereby ensuring light extraction efficiency at the normal viewing angle. However, due to the differences in functions between the first display area 101 and the second display area 102, and due to the light transmittance requirements of the second display area 102, the pixel driving circuits corresponding to the light-emitting elements 104 in the second display area 102 are arranged at a lower density, and the number of corresponding light-emitting elements 104 is smaller. Therefore, when provided with the same driving signal for full-screen display, the display brightness of the second display area 102 is lower than that of the first display area 101. To ensure that the display brightness of the second display area 102 matches the brightness of the first display area 101, the first light adjustment layer 1051 in the first display area 101 is a single-layer structure, for example, as shown in FIG. Figure 2 As shown, the third light adjustment layer 1071 in the second display area 102 can be a single-layer structure. In this case, the thickness of the third light adjustment layer 1071 is the thickness H of the single-layer third light adjustment layer 1071 along the first direction X. Alternatively, the third light adjustment layer 1071 in the second display area 102 can also be a multi-layer structure, as shown in FIG. Figure 4 The third light adjustment layer 1071 has a two-layer structure. In this case, the thickness of the third light adjustment layer 1071 is the sum of the thicknesses of the two third light adjustment layers 1071 along the first direction X, i.e., H2 + H3. By adjusting the thickness of the first light adjustment layer 1051 in the first display area 101 to be smaller than the thickness of the third light adjustment layer 1071 in the second display area 102, the third light adjustment layer 1071 can receive more wide-angle light. Furthermore, after total internal reflection at the interface between the third light adjustment layer 1071 and the fourth light adjustment layer 1072, the light is emitted as much as possible in the normal viewing direction. This improves the light extraction efficiency of the second display area 102. Under the same driving signal, the display brightness difference between the second display area 102 and the first display area 101 is minimized, thereby ensuring the overall service life of the display panel 100.

[0036] In an embodiment of the present invention, a first light adjustment structure in a first display area and a second light adjustment structure in a second display area are designed differently. Along a first direction, the thickness of the first light adjustment layer in the first light adjustment structure is smaller than the thickness of the third light adjustment layer in the second light adjustment structure. This allows the third light adjustment layer to receive more light at a larger angle and adjust the large-angle light so that it is emitted in the normal viewing direction, thereby improving the light extraction efficiency of the second display area and extending the overall service life of the display panel.

[0037] Optional, Figure 3 A structural diagram of another display panel provided by an embodiment of the present invention is shown in FIG. Figure 2 and Figure 3 As shown, along the first direction X, the fourth light adjustment layer 1072 does not overlap with the third light adjustment layer 1071 or at least partially overlaps with the third light adjustment layer 1071 .

[0038] Among them, Figure 2 As shown, along the first direction X, a third light adjustment layer 1071 and a fourth light adjustment layer 1072 are sequentially arranged. The fourth light adjustment layer 1072 and the third light adjustment layer 1071 at least partially overlap. Along the first direction X, the maximum thickness h of the fourth light adjustment layer 1072 is greater than the thickness H of the third light adjustment layer 1071, ensuring that the light emitted through the third light adjustment layer 1071 is emitted in the normal viewing direction as much as possible. Figure 3 As shown, further, the third light adjustment layer 1071 and the fourth light adjustment layer 1072 can be arranged not to overlap, and along the first direction X, the thickness h of the fourth light adjustment layer 1072 is equal to the thickness H of the third light adjustment layer 1071, so that the third light adjustment layer 1071 can receive more light at a larger angle. At the same time, the third light adjustment layer 1071 adjusts the large-angle light to be emitted directly in the normal viewing direction as much as possible, thereby ensuring the display effect of the second display area 102 and improving the service life of the second display area 102.

[0039] Optional, continue to refer to Figure 2 or Figure 3 Along the first direction X, the third light adjustment layer 1071 includes a first sub-light adjustment layer 109, and the fourth light adjustment layer 1072 is located on a side of the first sub-light adjustment layer 109 away from the base substrate 103; along the first direction X, a thickness H1 of the first sub-light adjustment layer 109 is greater than a thickness H of the first light adjustment layer 1051.

[0040] Among them, both the first light adjustment layer 1051 and the third light adjustment layer 1071 are single-layer structures. The third light adjustment layer 1071 only includes the first sub-light adjustment layer 109. By adjusting along the first direction X, the thickness H of the first sub-light adjustment layer 109 is greater than the thickness H1 of the first light adjustment layer 1051. The first sub-light adjustment layer 109 can adjust the exit angles of more large-angle lights, making them exit along the positive viewing angle direction, ensuring the light extraction efficiency of the second display area 102, improving the display brightness of the second display area 102, and further ensuring the service life of the display panel 100.

[0041] Optionally, Figure 4 is a schematic structural diagram of another display panel provided by an embodiment of the present invention. As Figure 4 shown, the third light adjustment layer 1071 includes a first sub-light adjustment layer 109 and a second sub-light adjustment layer 110 arranged in sequence along the first direction X. Along the first direction X, the thickness of the first light adjustment layer 1051 is H1, the thickness of the first sub-light adjustment layer 109 is H2, and the thickness of the second sub-light adjustment layer 110 is H3. Among them, H1 < H2 + H3.

[0042] Among them, the third light adjustment layer 1071 located in the second display area 102 can be a double-layer structure, that is, the third light adjustment layer 1071 includes a first sub-light adjustment layer 109 and a second sub-light adjustment layer 110 arranged in sequence along the first direction X. The first sub-light adjustment layer 109 and the second sub-light adjustment layer 110 can be arranged at intervals, or the first sub-light adjustment layer 109 and the second sub-light adjustment layer 110 can be stacked in sequence. The specific setting method can be selected according to actual design requirements. As Figure 4 shown, taking the example that the first light adjustment structure 105 includes a single-layer first light adjustment layer 1051 and the first sub-light adjustment layer 109 and the second sub-light adjustment layer 110 are stacked along the first direction X for display. Among them, along the first direction X, the sum of the thickness H2 of the first sub-light adjustment layer 109 and the thickness H3 of the second sub-light adjustment layer 110 is greater than the thickness H1 of the first light adjustment layer 1051. Compared with the adjustment of large-angle lights by the first light adjustment layer 1051, the adjustment of more large-angle lights at more angles by the third light adjustment layer 1071 is improved, and thus the display brightness of the second display area 102 is improved.

[0043] Optionally, Figure 5 is a schematic structural diagram of another display panel provided by an embodiment of the present invention. As Figure 4 and 5 shown, the first sub-light adjustment layer 109 includes a first sub-opening 1091, the second sub-light adjustment layer 110 includes a second sub-opening 1101, and along the first direction X, the projection of the first sub-opening 1091 and the projection of the second sub-opening 1101 at least partially overlap.

[0044] The third light adjustment layer 1071 located in the second display area 102 may have a double-layer structure. The third light adjustment layer 1071 includes a first sub-light adjustment layer 109 and a second sub-light adjustment layer 110 sequentially arranged along the first direction X. The materials of the first sub-light adjustment layer 109 and the second sub-light adjustment layer 110 may be different and may be prepared in steps. For example, Figure 4 As shown, along the first direction X, the projection of the first sub-opening 1091 overlaps with the projection of the second sub-opening 1101, that is, the projection area of ​​the first sub-opening 1091 is equal to the projection area of ​​the second sub-opening 1101, the size of the first sub-opening 1091 is the same as the size of the second sub-opening 1101, the projection area of ​​the first sub-light adjustment layer 109 is the same as the projection area of ​​the second sub-light adjustment layer 110, and the first sub-opening 1091 of the first sub-light adjustment layer 109 and the second sub-opening 1101 of the second sub-light adjustment layer 110 can be prepared by a synchronous etching process, simplifying the process preparation flow, and then the large-angle light emitted by the light-emitting element 104 passes through the fourth light adjustment layer 1072 and the first sub-light adjustment layer 109 or passes through the fourth light adjustment layer 1072 and the second sub-light adjustment layer 110 in sequence, and is totally reflected to perform light adjustment, thereby ensuring the light extraction efficiency of the second display area 102. Or, as Figure 5 As shown, along the first direction X, the projection of the first sub-opening 1091 partially overlaps with the projection of the second sub-opening 1101, the projection area of ​​the first sub-opening 1091 is smaller than the projection area of ​​the second sub-opening 1101, the size of the first sub-opening 1091 is smaller than the size of the second sub-opening 1101, and the projection area of ​​the first sub-light adjustment layer 109 is larger than the projection area of ​​the second sub-light adjustment layer 110, so that the light adjusted by the first sub-light adjustment layer 109 and the second sub-light adjustment layer 110 is emitted in the normal viewing angle direction as much as possible, while effectively ensuring the display area of ​​the second display area 102.

[0045] Optional, continue to refer to Figure 4 or Figure 5 Along the first direction X, the fourth light adjustment layer 1072 is located on the side of the third light adjustment layer 1071 away from the base substrate 103. The refractive index of the first sub-light adjustment layer 109 is n1, the refractive index of the second sub-light adjustment layer 110 is n2, and the refractive index of the fourth light adjustment layer 1072 is n3, where n3>n1≥n2.

[0046] In the second display area 102, the refractive index of the fourth light adjustment layer 1072 is greater than the refractive index of the third light adjustment layer 1071, so that the large-angle light emitted by the light-emitting element 104 is totally reflected at the interface between the fourth light adjustment layer and the third light adjustment layer 1071, thereby adjusting the emission angle of the large-angle light to ensure that the light is emitted in the normal viewing direction as much as possible. The refractive index n1 of the first sub-light adjustment layer 109 in the third light adjustment layer 1071 can be controlled to be equal to the refractive index n2 of the second sub-light adjustment layer 110, that is, the first sub-light adjustment layer 109 is equal to the refractive index n2 of the second sub-light adjustment layer 110. The material of the layer 109 and the second sub-light adjustment layer 110 is the same, or the refractive indices of the first sub-light adjustment layer 109 and the second sub-light adjustment layer 110 in the third light adjustment layer 1071 can be controlled to be different, so that the refractive index n1 of the first sub-light adjustment layer 109 is greater than the refractive index n2 of the second sub-light adjustment layer 110. In this way, high-angle light incident on the first sub-light adjustment layer 109 and high-angle light incident on the second sub-light adjustment layer 110 can both undergo total internal reflection and be emitted in the normal viewing direction as much as possible, effectively improving the light extraction efficiency of the second display area 102.

[0047] Optional, Figure 6 A structural diagram of another display panel provided by an embodiment of the present invention is shown in FIG. Figure 6 As shown, the first sub-light adjustment layer 109 includes a first sub-opening 1091 and a first side wall 1092 close to the first sub-opening 1091, and the second sub-light adjustment layer 110 includes a second sub-opening 1101 and a second side wall 1102 close to the second sub-opening 1101. The angle between the first side wall 1092 and the base substrate 103 is θ1, and the angle between the second side wall 1102 and the base substrate 103 is θ2, wherein θ1<θ2.

[0048] Among them, the third light adjustment layer 1071 located in the second display area 102 can be a double-layer structure. The third light adjustment layer 1071 includes a first sub-light adjustment layer 109 and a second sub-light adjustment layer 110 arranged in sequence along the first direction X. At the same time, when the first sub-light adjustment layer 109 and the second sub-light adjustment layer 110 are made of the same material, the angle θ1 between the first side wall 1092 of the first sub-light adjustment layer 109 near the first sub-opening 1091 and the base substrate 103 can be adjusted to be smaller than the angle θ2 between the second side wall 1102 of the second sub-light adjustment layer 110 near the second sub-opening 1101 and the base substrate 103. This ensures that when the high-angle light emitted by the light-emitting element 104 passes through the first sub-light adjustment layer 109 or the second sub-light adjustment layer 110, it can be totally reflected and emitted in the direction of the normal viewing angle as much as possible, thereby ensuring the light extraction efficiency and display brightness of the second display area 102.

[0049] Optional, continue to refer to Figure 4 、 Figure 5 or Figure 6 Along the first direction X, the fourth light adjustment layer 1072 is located on the side of the first sub-light adjustment layer 109 away from the base substrate 103, and the second sub-light adjustment unit is located on the side of the fourth light adjustment layer 1072 away from the base substrate 103. The refractive index of the first sub-light adjustment layer 109 is n1, the refractive index of the second sub-light adjustment layer 110 is n2, and the refractive index of the fourth light adjustment layer 1072 is n3, where n3>n2>n1.

[0050] In the second display area 102, under the premise that the refractive index of the fourth light adjustment layer 1072 is greater than the refractive index of the third light adjustment layer 1071, the high-angle light emitted by the light-emitting element 104 is totally reflected at the contact interface between the fourth light adjustment layer 1072 and the third light adjustment layer 1071, thereby adjusting the emission angle of the high-angle light to ensure that the light is emitted at a normal viewing angle as much as possible. By controlling the refractive index n1 of the first sub-light adjustment layer 109 in the third light adjustment layer 1071 to be less than the refractive index n2 of the second sub-light adjustment layer 110, the high-angle light incident on the first sub-light adjustment layer 109 and the high-angle light incident on the second sub-light adjustment layer 110 can also be totally reflected and emitted at a normal viewing angle as much as possible, thereby effectively improving the light extraction efficiency of the second display area 102.

[0051] Optional, Figure 7 A structural diagram of another display panel provided by an embodiment of the present invention is shown in FIG. Figure 7 As shown, along the first direction X, the second sub-light adjustment layer 110 includes a first surface 111 away from the base substrate 103, and the fourth light adjustment layer 1072 includes a second surface 112 away from the base substrate 103 and at least partially overlapping with the second opening 108. The first surface 111 and the second surface 112 are located on the same plane.

[0052] The third light adjustment layer 1071 includes two layers, namely a first sub-light adjustment layer 109 and a second sub-light adjustment layer 110. The first sub-light adjustment layer 109 and the second sub-light adjustment layer 110 are spaced apart. The first sub-light adjustment layer 109 is located on the side close to the base substrate 103, and the second sub-light adjustment layer 110 is located on the side of the first sub-light adjustment layer 109 away from the base substrate 103. The first sub-light adjustment layer 109 and the second sub-light adjustment layer 110 can both adjust the emission direction of large-angle light. During the preparation of the second light adjustment structure 107, the first sub-light adjustment layer 109 is prepared first. The fourth light adjustment layer 1072 is then prepared, and after the fourth light adjustment layer 1072 is etched, the second sub-light adjustment layer 110 is prepared, so that the first surface 111 of the second sub-light adjustment layer 110, which is away from the base substrate 103, and the second surface 112 of the fourth light adjustment layer 1072, which is away from the base substrate 103, are located on the same plane. When part of the high-angle light is totally reflected by the fourth light adjustment layer 1072 and the second sub-light adjustment layer 110, it can be directly emitted in the normal viewing direction, reducing the probability of re-refraction at the second surface 112 of the fourth light adjustment layer 1072, which affects the light output angle.

[0053] Optional, continue to refer to Figure 2 、 Figure 6 or Figure 7 The third light adjustment layer 1071 includes a sidewall 113 close to the second opening 108 . The angle between the sidewall 113 and the base substrate 103 is θ3, where 70°≤θ3≤90°.

[0054] Among them, the third light adjustment layer 1071 includes a side wall 113 close to the second opening 108. The side wall 113 can be a straight edge, and the angle between the side wall 113 and the base substrate 103 can be controlled between 70° and 90° to ensure that the light emitted through the light-emitting element 104 is incident on the third light adjustment layer 1071 with a small refractive index from the fourth light adjustment layer 1072 with a large refractive index. After the light is totally reflected by the side wall 113, it is emitted in the direction of the normal viewing angle as much as possible, thereby reducing the probability of large-angle light emission from the second display area 102 and improving the display brightness of the second display area 102.

[0055] Optional, Figure 8 A structural diagram of another display panel provided by an embodiment of the present invention is shown in FIG. Figure 8 As shown, along the first direction X, for any two points in the side wall 113 , the angle θ31 between the tangent line of the point close to the base substrate 103 and the base substrate 103 is greater than the angle θ32 between the tangent line of the point far from the base substrate 103 and the base substrate 103 .

[0056] Among them, Figure 8As shown, the third light adjustment layer 1071 includes a side wall 113 near the second opening 108. The side wall 113 can also be configured as an arc edge. To ensure that large-angle light is emitted at an angle after being totally reflected at the third light adjustment layer 1071, an angle θ31 between a tangent line at a point on the side of the side wall 113 close to the base substrate 103 and the base substrate 103 is greater than an angle θ32 between a tangent line at a point on the side of the side wall 113 far from the base substrate 103 and the base substrate 103 along the first direction X. The curvature of the side wall 113 gradually decreases, ensuring that light is emitted as much as possible along the normal viewing angle direction after being totally reflected by the side wall 113 of the third light adjustment layer 1071, thereby improving the light extraction efficiency of the second display area 102.

[0057] Optional, Figure 9 A structural diagram of another display panel provided by an embodiment of the present invention is shown in FIG. Figure 9 As shown, the second light adjustment layer 1052 and the fourth light adjustment layer 1072 are integrally provided.

[0058] In the manufacturing process of the display panel 100, after preparing the first light adjustment layer 1051 of the first display area 101 and the third light adjustment layer 1071 of the second display area 102, the second light adjustment layer 1052 and the fourth light adjustment layer 1072 can be prepared on the same layer. At this time, the second light adjustment layer 1052 and the fourth light adjustment layer 1072 can be made of the same material, so that the second light adjustment layer 1052 and the fourth light adjustment layer 1072 are an integrated structure, which effectively simplifies the process flow and reduces the production cost.

[0059] Optional, Figure 10 A schematic diagram of the structure of a second display area provided by an embodiment of the present invention is shown in FIG. Figure 10 As shown, the light emitting element 104 includes at least a red light emitting element 1041, a green light emitting element 1042, and a blue light emitting element 1043. The third light adjustment layer 1071 includes at least a first light adjustment section 114, a second light adjustment section 115, and a third light adjustment section 116. The first light adjustment section 114 includes a first opening section 1141, the second light adjustment section 115 includes a second opening section 1151, and the third light adjustment section 116 includes a third opening section 1142. In section 1161, along the first direction X, the red light emitting element 1041 at least partially overlaps with the first opening section 1141, the green light emitting element 1042 at least partially overlaps with the second opening section 1151, and the blue light emitting element 1043 at least partially overlaps with the third opening section 1161. The thickness of the first light adjustment section 114 is h1, the thickness of the second light adjustment section 115 is h2, and the thickness of the third light adjustment section 116 is h3, wherein h3

[0060] ​In order to realize normal display of the display panel 100, the light emitting element 104 may include a red light emitting element 1041, a green light emitting element 1042, and a blue light emitting element 1043. A third light adjustment layer 1071 and a fourth light adjustment layer 1072 are sequentially arranged along the first direction X. Light emitting elements of different colors correspond to different third light adjustment layers 1071. Therefore, the third light adjustment layer 1071 includes a first light adjustment section 114 corresponding to the red light emitting element 1041, a second light adjustment section 115 corresponding to the green light emitting element 1042, and a third light adjustment section 116 corresponding to the blue light emitting element 1043. The third light adjustment section 116 is disposed, and the first light adjustment section 114 includes a first opening section 1141, so that the red light emitted by the red light emitting element 1041 along the normal viewing direction can be emitted from the first opening section 1141. The second light adjustment section 115 includes a second opening section 1151, so that the green light emitted by the green light emitting element 1042 along the normal viewing direction can be emitted from the second opening section 1151. The third light adjustment section 116 includes a third opening section 1161, so that the blue light emitted by the blue light emitting element 1043 along the normal viewing direction can be emitted from the third opening section 1161. In the second display area 102, the light emitting areas of different colors are the same, and the light emitting brightness of the light emitting areas of different colors is different. Figure 10 As shown, when the third light adjustment layer 1071 is a single layer, the thickness h2 of the second light adjustment section 115 of the green light emitting element 1042 can be adjusted to be greater than the thickness h1 of the first light adjustment section 114 of the red light emitting element 1041, and the thickness h1 of the first light adjustment section 114 of the red light emitting element 1041 can be adjusted to be greater than the thickness h3 of the third light adjustment section 116 of the blue light emitting element 1043. By adjusting the large-angle light in different color areas through the third light adjustment layer 1071, the luminance of the green light emitting area is greater than the luminance of the red light emitting area, and the luminance of the red light emitting area is greater than the luminance of the blue light emitting area, thereby improving the overall display effect of the second display area 102.

[0061] Optional, Figure 11 A structural diagram of another display panel provided by an embodiment of the present invention is shown in FIG. Figure 11As shown, the display panel 100 includes a third display area 117, which at least partially surrounds the second display area 102, and the first display area 101 at least partially surrounds the third display area 117. The third display area 117 includes a third light adjustment structure 118, and the third light adjustment structure 118 is located on the side of the light-emitting element 104 away from the base substrate 103; the third light adjustment structure 118 includes a fifth light adjustment layer 1181 and a sixth light adjustment layer 1182, and the refractive index of the fifth light adjustment layer 1181 is greater than the refractive index of the sixth light adjustment layer 1182; the fifth light adjustment layer 1181 includes a third opening 119, and the third opening 119 at least partially overlaps with the light-emitting element 104; along the first direction X, the thickness of the first light adjustment layer 1051 is H1, the thickness of the third light adjustment layer 1071 is H4, and the thickness of the fifth light adjustment layer 1181 is H5, wherein H1<H5<H4.

[0062] To ensure the overall display effect of the display panel 100, the display panel 100 includes a third display area 117, which is a transition area. The third display area 117 surrounds the second display area 102, and the first display area 101 surrounds the third display area 117. The third display area 117 includes a third light adjustment structure 118, which is located on the side of the light-emitting element 104 away from the base substrate 103. The third light adjustment structure 118 includes a fifth light adjustment layer 1181 and a sixth light adjustment layer 1182 arranged in sequence along the first direction X. The refractive index of the fifth light adjustment layer 1181 is greater than the refractive index of the sixth light adjustment layer 1182. The fifth light adjustment layer 1181 can be a single-layer structure or a double-layer structure. Figure 11In the figure, the fifth light adjustment layer 1181 is a single-layer structure, and the third light adjustment layer 1071 is a single-layer structure. The fifth light adjustment layer 1181 includes a third opening 119, which at least partially overlaps with the light-emitting element 104. The third opening 119 is filled with the sixth light adjustment layer 1182, so that the normal-angle light emitted by the light-emitting element 104 is directly emitted. For the high-angle light emitted by the light-emitting element 104, after entering the fifth light adjustment layer 1181 through the sixth light adjustment layer 1182, it is totally reflected, thereby ensuring the adjustment of the high-angle light. Due to the different pixel densities in different display areas, To ensure that different display areas have the same display effect under the same driving signal, it is necessary to adjust the light emitted from different display areas accordingly. To ensure the display effect of different display areas, along the first direction X, the thickness H1 of the first light adjustment layer 1051 can be less than the thickness H5 of the fifth light adjustment layer 1181, and the thickness H5 of the fifth light adjustment layer 1181 can be less than the thickness H4 of the third light adjustment layer 1071. This allows the first light adjustment layer 1051, the third light adjustment layer 1071, and the fifth light adjustment layer 1181 to gradually increase their ability to adjust large-angle light, effectively improving the light extraction efficiency of the second display area 102.

[0063] Optional, Figure 12 A structural diagram of another display panel provided by an embodiment of the present invention is shown in FIG. Figure 12 As shown, along the first direction X, the fifth light adjustment layer 1181 includes a third sub-light adjustment layer 1183, and the sixth light adjustment layer 1182 is located on the side of the third sub-light adjustment layer 1183 away from the base substrate 103; along the first direction X, the thickness H6 of the third sub-light adjustment layer 1183 is greater than the thickness H1 of the first light adjustment layer 1051, and the thickness H6 of the third sub-light adjustment layer 1183 is less than the thickness H4 of the third light adjustment layer 1071.

[0064] The fifth light adjustment layer 1181 in the third display area 117 is a single-layer structure, including a third sub-light adjustment layer 1183. The third light adjustment layer 1071 in the second display area 102 is a double-layer structure, including a first sub-light adjustment layer 109 and a second sub-light adjustment layer 110. As a result, the thickness H6 of the third sub-light adjustment layer 1183 is greater than the thickness H1 of the first light adjustment layer 1051, and the thickness H6 of the third sub-light adjustment layer 1183 is less than the thickness H1 of the first sub-light adjustment layer 109. The sum of the thickness H2 of the first display area 101 and the thickness H3 of the second sub-light adjustment layer 110, and then the adjustment capabilities of the first display area 101, the third display area 117 and the second display area 102 for large-angle light are successively enhanced, so that the adjusted large-angle light is emitted along the normal-angle light as much as possible, and at the same time, the pixel density of the first display area 101, the third display area 117 and the second display area 102 is matched with the characteristic of decreasing in sequence, so that the display brightness of the first display area 101, the second display area 102 and the third display area 117 are similar, thereby ensuring the overall display effect and service life of the display panel 100.

[0065] Optional, Figure 13 A structural diagram of another display panel provided by an embodiment of the present invention is shown in FIG. Figure 13 As shown, along the first direction X, the fifth light adjustment layer includes a third sub-light adjustment layer 1183 and a fourth sub-light adjustment layer 1184. Along the first direction X, the thickness of the third sub-light adjustment layer 1183 is H6, the thickness of the fourth sub-light adjustment layer 1184 is H7, the thickness of the first light adjustment layer 1051 is H1, and the thickness of the third light adjustment layer 1071 is H4, wherein H1<H6+H7<H4.

[0066] Among them, Figure 13As shown, for example, along the first direction X, the third light adjustment layer 1071 can be set as a two-layer structure, and the third light adjustment layer 1071 includes a first sub-light adjustment layer 109 and a second sub-light adjustment layer 110. The fifth light adjustment layer 1181 can also be set as a two-layer structure, and the fifth light adjustment layer 1181 includes a third sub-light adjustment layer 1183 and a fourth sub-light adjustment layer 1184. The first light adjustment layer 1051 is set as a single-layer structure. The thickness H2 of the first sub-light adjustment layer 109 on the side close to the base substrate 103 in the third light adjustment layer 1071, and the thickness H3 of the third sub-light adjustment layer 1181 on the side close to the base substrate 103 in the fifth light adjustment layer 1181 are The thickness H6 of the light adjustment layer 1183 is the same as the thickness H1 of the first light adjustment layer 1051. The thickness H3 of the second sub-light adjustment layer 110 on the side of the third light adjustment layer 1071 away from the base substrate 103 is greater than the thickness H7 of the fourth sub-light adjustment layer 1184 on the side of the fifth light adjustment layer 1181 away from the base substrate 103. Similarly, the first light adjustment layer 1051, the fifth light adjustment layer 1181, and the third light adjustment layer 1071 can gradually increase their ability to adjust large-angle light, effectively improving the light extraction efficiency of the second display area 102 and the third display area 117, thereby ensuring the overall display brightness of the display panel 100.

[0067] Optional, continue to refer to Figure 11 The refractive index of the first light adjustment layer 1051 is n4, the refractive index of the third light adjustment layer 1071 is n5, and the refractive index of the fifth light adjustment layer is n6, wherein n5≤n6≤n4.

[0068] Specifically, under the premise that the thicknesses of the first light adjustment layer 1051, the second light adjustment layer 1052, and the third light adjustment layer 1071 gradually increase, the refractive index n4 of the first light adjustment layer 1051, the refractive index n5 of the third light adjustment layer 1071, and the fifth light adjustment layer n6 can be made the same, that is, they are made of the same material and can be manufactured in the same layer, effectively simplifying the process. Alternatively, under the premise that the thicknesses of the first light adjustment layer 1051, the second light adjustment layer 1052, and the third light adjustment layer 1071 gradually increase, the refractive index n4 of the first light adjustment layer 1051, the refractive index n5 of the third light adjustment layer 1071, and the refractive index n6 of the fifth light adjustment layer can be adjusted to be different. This makes it easier for total internal reflection to occur between the third light adjustment layer 1071 and the fourth light adjustment layer 1072 in the second display area 102. This makes it easier for large-angle light to be emitted in the normal viewing direction after being adjusted by the third light adjustment layer 1071, thereby ensuring light extraction efficiency in the second display area 102.

[0069] Figure 14 A schematic structural diagram of a display device provided by an embodiment of the present invention is shown in FIG. Figure 14As shown, the display device 200 includes the display panel 100 described in the above embodiment.

[0070] It should be noted that since the display device provided in this embodiment has the same or corresponding beneficial effects as the display panel 100 in the above embodiment, no further description is given here. The display device 200 provided in this embodiment of the present invention can be Figure 14 The mobile phone shown can also be any electronic product with a display function, including but not limited to the following categories: televisions, laptops, desktop monitors, tablet computers, digital cameras, smart bracelets, smart glasses, car displays, medical equipment, industrial control equipment, touch interactive terminals, etc. The embodiments of the present invention do not specifically limit this.

[0071] The above specific embodiments do not limit the scope of protection of the present invention. Those skilled in the art will appreciate that various modifications, combinations, sub-combinations, and substitutions may be made based on design requirements and other factors. Any modifications, equivalent substitutions, and improvements made within the spirit and principles of the present invention are intended to be included within the scope of protection of the present invention.

Claims

1. A display panel, characterized in that: comprising a first display area and a second display area, wherein the first display area at least partially surrounds the second display area; The display panel includes: substrate; A plurality of light-emitting elements are located on one side of the base substrate; a first light adjustment structure located in the first display area and on a side of the light-emitting element away from the base substrate, the first light adjustment structure comprising a first light adjustment layer and a second light adjustment layer, the second light adjustment layer having a greater refractive index than the first light adjustment layer; the first light adjustment layer comprising a first opening, the first opening at least partially overlapping the light-emitting element; a second light adjustment structure located in the second display area and on a side of the light-emitting element away from the base substrate, the second light adjustment structure comprising a third light adjustment layer and a fourth light adjustment layer, the fourth light adjustment layer having a greater refractive index than the third light adjustment layer; the third light adjustment layer comprising a second opening, the second opening at least partially overlapping the light-emitting element; the third light adjustment layer comprising a first sub-light adjustment layer, the fourth light adjustment layer being located on a side of the first sub-light adjustment layer away from the base substrate; Along the first direction, the thickness of the first sub-light adjustment layer is greater than the thickness of the first light adjustment layer; Alternatively, the third light adjustment layer includes a first sub-light adjustment layer and a second sub-light adjustment layer arranged in sequence along the first direction. Along the first direction, the thickness of the first light adjustment layer is H1, the thickness of the first sub-light adjustment layer is H2, and the thickness of the second sub-light adjustment layer is H3, wherein H1n1≥n2.

2. The display panel according to claim 1, wherein: The first sub-light adjustment layer includes a first sub-opening and a first side wall close to the first sub-opening, the second sub-light adjustment layer includes a second sub-opening and a second side wall close to the second sub-opening, the angle between the first side wall and the base substrate is θ1, and the angle between the second side wall and the base substrate is θ2, wherein θ1<θ2.

3. The display panel according to claim 1, wherein: ​ 4. The display panel according to claim 1, wherein: ​ 5. The display panel according to claim 1, wherein: ​ 6. The display panel according to claim 1, wherein: Along the first direction, the fourth light adjustment layer is located on a side of the first sub-light adjustment layer away from the base substrate, and the second sub-light adjustment layer is located on a side of the fourth light adjustment layer away from the base substrate. The refractive index of the first sub-light adjustment layer is n1, the refractive index of the second sub-light adjustment layer is n2, and the refractive index of the fourth light adjustment layer is n3, wherein n3>n2>n1.

7. The display panel according to claim 6, wherein: Along the first direction, the second sub-light adjustment layer includes a first surface away from the base substrate, and the fourth light adjustment layer includes a second surface away from the base substrate and at least partially overlapping with the second opening, and the first surface and the second surface are located on the same plane.

8. The display panel according to claim 1, wherein: The third light adjustment layer includes a sidewall close to the second opening, and an included angle between the sidewall and the base substrate is θ3, wherein 70°≤θ3≤90°.

9. The display panel according to claim 8, wherein: Along the first direction, for any two points on the sidewall, the angle between the tangent line of the point close to the substrate and the substrate is greater than the angle between the tangent line of the point far from the substrate and the substrate.

10. The display panel according to claim 1, wherein The second light adjustment layer and the fourth light adjustment layer are integrally provided.

11. The display panel according to claim 1, wherein The light-emitting elements include at least a red light-emitting element, a green light-emitting element, and a blue light-emitting element. The third light adjustment layer includes at least a first light adjustment section, a second light adjustment section, and a third light adjustment section. The first light adjustment section includes a first opening section, the second light adjustment section includes a second opening section, and the third light adjustment section includes a third opening section. Along the first direction, the red light-emitting element at least partially overlaps with the first opening section, the green light-emitting element at least partially overlaps with the second opening section, and the blue light-emitting element at least partially overlaps with the third opening section. The thickness of the first light adjustment section is h1, the thickness of the second light adjustment section is h2, and the thickness of the third light adjustment section is h3, wherein h3<h1<h2.

12. The display panel according to claim 1, wherein The display panel includes a third display area, the third display area at least partially surrounds the second display area, the first display area at least partially surrounds the third display area, the third display area includes a third light adjustment structure, and the third light adjustment structure is located on a side of the light-emitting element away from the base substrate; The third light adjustment structure includes a fifth light adjustment layer and a sixth light adjustment layer, wherein the refractive index of the fifth light adjustment layer is greater than the refractive index of the sixth light adjustment layer; the fifth light adjustment layer includes a third opening, and the third opening at least partially overlaps with the light emitting element; Along the first direction, the thickness of the first light adjustment layer is H1, the thickness of the third light adjustment layer is H4, and the thickness of the fifth light adjustment layer is H5, wherein H1<H5<H4.

13. The display panel according to claim 12, wherein: Along the first direction, the fifth light adjustment layer includes a third sub-light adjustment layer, and the sixth light adjustment layer is located on a side of the third sub-light adjustment layer away from the base substrate; Along the first direction, the thickness of the third light adjustment sub-layer is greater than the thickness of the first light adjustment layer, and the thickness of the third light adjustment sub-layer is less than the thickness of the third light adjustment layer.

14. The display panel according to claim 12, wherein: Along the first direction, the fifth light adjustment layer includes a third sub-light adjustment layer and a fourth sub-light adjustment layer; Along the first direction, the thickness of the third light adjustment layer is H6, the thickness of the fourth light adjustment layer is H7, the thickness of the first light adjustment layer is H1, and the thickness of the third light adjustment layer is H4, wherein H1<H6+H7<H4.

15. The display panel according to claim 12, wherein: The refractive index of the first light adjustment layer is n4, the refractive index of the third light adjustment layer is n5, and the refractive index of the fifth light adjustment layer is n6, wherein n5≤n6≤n4.

16. A display device, characterized in that: The display panel comprises the display panel according to any one of claims 1 to 15.

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