A display panel and a display device

Abstract

The embodiment of the present invention discloses a display panel and a display device. The display panel includes a substrate, a light-emitting element and a retaining wall structure arranged on one side of the substrate. The retaining wall structure surrounds the light-emitting element. At least part of the retaining wall structure includes a first retaining wall section and a second retaining wall section that are connected to each other. The first retaining wall section is located on the side of the second retaining wall section away from the substrate. The first retaining wall section includes a first side surface close to the light-emitting element, and the second retaining wall section includes a second side surface close to the light-emitting element. The angle between the first side surface and the plane where the substrate is located is smaller than the angle between the second side surface and the plane where the substrate is located, and along the thickness direction of the display panel, the coverage area of the first retaining wall section is smaller than or equal to the coverage area of the second retaining wall section. By adopting the above technical solution, the width of the retaining wall can be reduced, thereby improving the pixel distribution density of the display panel, realizing a high-resolution display panel, and ensuring a better display effect of the display panel.

Description

Technical Field

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

[0002] With the continuous development of display technology, the display requirements for display panels are becoming higher and higher, especially the requirements for the resolution of display panels are becoming higher and higher.

[0003] In the existing display panel structure, the resolution of the display panel still needs to be improved. Summary of the Invention

[0004] Embodiments of the present invention provide a display panel and a display device, which reserve more space for light-emitting elements by adjusting the shape of a retaining wall structure, thereby increasing the distribution density of the light-emitting elements and realizing a high-resolution display panel.

[0005] In a first aspect, embodiments of the present invention provide a display panel comprising a substrate, a light-emitting element disposed on one side of the substrate, and a retaining wall structure. The retaining wall structure surrounds the light-emitting element, and at least a portion of the retaining wall structure comprises a first retaining wall section and a second retaining wall section connected to each other, with the first retaining wall section being located on a side of the second retaining wall section away from the substrate. The first retaining wall section includes a first side surface proximate to the light-emitting element, and the second retaining wall section includes a second side surface proximate to the light-emitting element. The angle between the first side surface and the plane of the substrate is smaller than the angle between the second side surface and the plane of the substrate, and along the thickness direction of the display panel, the coverage area of the first retaining wall section is smaller than or equal to the coverage area of the second retaining wall section.

[0006] In a second aspect, an embodiment of the present invention provides a display device, comprising the display panel described in any one of the first aspects.

[0007] The display panel provided by the present invention reduces the width of the second retaining wall in the retaining wall structure by setting the angle between the first side surface of the first retaining wall section close to the light-emitting element and the plane where the substrate is located to be smaller than the angle between the second side surface of the second retaining wall section close to the light-emitting element and the plane where the substrate is located. In this way, more setting space can be reserved for the light-emitting elements, so as to improve the distribution density of the light-emitting elements and thus realize a high-resolution display panel; at the same time, along the thickness direction of the display panel, the coverage area of the first retaining wall distribution is set to be smaller than or equal to the coverage area of the second retaining wall section, that is, a retaining wall structure with a small upper part and a large lower part is formed, which can simplify the preparation process of the retaining wall structure. BRIEF DESCRIPTION OF THE DRAWINGS

[0008] In order to more clearly illustrate the embodiments of the present invention or the technical solutions in the prior art, a brief introduction will be given below to the drawings required for use in the embodiments or the description of the prior art. Obviously, although the drawings described below are some specific embodiments of the present invention, for those skilled in the art, the basic concepts of the device structure, driving method and manufacturing method disclosed and suggested by the various embodiments of the present invention can be expanded and extended to other structures and drawings. Undoubtedly, these should all be within the scope of the claims of the present invention.

[0009] Figure 1 is a structural schematic diagram of a display panel provided by an embodiment of the present invention;

[0010] Figure 2 yes Figure 1 A schematic diagram of a cross-sectional structure along the A-A' direction;

[0011] Figure 3 yes Figure 1 Another schematic diagram of the cross-sectional structure along the A-A' direction;

[0012] Figure 4 yes Figure 1 Another schematic diagram of the cross-sectional structure along the A-A' direction;

[0013] Figure 5 yes Figure 1 A schematic diagram of a cross-sectional structure along the B-B' direction;

[0014] Figure 6 yes Figure 1 Another cross-sectional structure schematic diagram along the BB' direction;

[0015] Figure 7 yes Figure 1 A schematic diagram of a cross-sectional structure along the C-C' direction;

[0016] Figure 8 This Figure 1 Another cross-sectional structure schematic diagram along the C-C' direction;

[0017] Figure 9 This Figure 1 Another cross-sectional structure schematic diagram along the C-C' direction;

[0018] Figure 10 A schematic structural diagram of a display device provided by an embodiment of the present invention. DETAILED DESCRIPTION

[0019] To make the objectives, technical solutions, and advantages of the present invention more clear, the following will refer to the accompanying drawings of the embodiments of the present invention to clearly and completely describe the technical solutions of the present invention through implementation methods. Obviously, the described embodiments are only some embodiments of the present invention, not all embodiments. Based on the basic concepts disclosed and suggested by the embodiments of the present invention, all other embodiments obtained by those skilled in the art are within the scope of protection of the present invention.

[0020] Figure 1 is a structural diagram of a display panel provided by an embodiment of the present invention, Figure 2 yes Figure 1 A schematic diagram of a cross-sectional structure along the A-A' direction, combined with Figure 1 and Figure 2 As shown, the display panel 10 provided by the embodiment of the present invention includes a substrate 11 and a light-emitting element 12 and a retaining wall structure 13 arranged on one side of the substrate 11. The retaining wall structure 13 surrounds the light-emitting element 12, and at least part of the retaining wall structure 13 includes a first retaining wall section 131 and a second retaining wall section 132 connected to each other. The first retaining wall section 131 is located on the side of the second retaining wall section 132 away from the substrate 11. The first retaining wall section 131 includes a first side surface 1311 close to the light-emitting element 12, and the second retaining wall section 132 includes a second side surface 1322 close to the light-emitting element 12. The angle between the first side surface 1311 and the plane where the substrate 11 is located is smaller than the angle between the second side surface 1322 and the plane where the substrate is located. In addition, along the thickness direction of the display panel 10, that is, the X direction shown in the figure, the coverage area of the first retaining wall section 131 is smaller than or equal to the coverage area of the second retaining wall section 132.

[0021] Exemplarily, the light-emitting element 12 is provided on one side of the substrate 11 and is electrically connected to the substrate 11. The substrate 11 may be a driving substrate for providing a driving signal for the light-emitting element 12 to emit light. The driving signal may include, for example, an anode signal, a cathode signal, and a data signal to ensure that the light-emitting element 12 can emit light normally. Optionally, a driving circuit (not shown) for driving the light-emitting element 12 to emit light is provided in the substrate 11. The driving circuit is electrically connected to the light-emitting element 12 and is used to drive the light-emitting element 12 to emit light. Depending on the driving mode of the light-emitting element 12, the specific setting mode of the driving circuit may be different. Specifically, when the driving mode of the light-emitting element 12 is active driving, the driving circuit may include multiple thin-film transistors, which drive the light-emitting element 12 to emit light through the thin-film transistors; when the driving mode of the light-emitting element 12 is passive driving, the driving circuit may include cathode signal lines and anode signal lines, which drive the light-emitting element 12 to emit light through the cathode signal lines and anode signal lines. The specific setting mode of the driving circuit is not described in the embodiment of the present invention.

[0022] The light-emitting element 12 may include a light-emitting diode, which may include a light-emitting body 12a and an electrode 12b arranged on the surface of the light-emitting body 12a. The light-emitting body 12a may further include a P-type semiconductor layer, a light-emitting composite layer and an N-type semiconductor layer (not shown in the figure). Correspondingly, the electrode may include an anode and a cathode. The anode is electrically connected to the driving substrate and the P-type semiconductor layer, respectively, and the driving substrate provides an anode display signal to the P-type semiconductor layer through the anode. The cathode is electrically connected to the driving substrate and the N-type semiconductor layer, respectively, and the driving substrate provides a cathode display signal to the N-type semiconductor layer through the cathode. The holes generated in the P-type semiconductor layer and the electrons generated in the N-type semiconductor layer recombine and emit light in the light-emitting composite layer, thereby realizing normal light-emitting display of the light-emitting element 12.

[0023] Furthermore, the display panel 10 further includes a retaining wall structure 13 located on one side of the substrate 11 and between two adjacent light emitting elements 12, such as Figure 1 As shown, the retaining wall structure 13 can form a grid-shaped light-shielding retaining wall, and the light-emitting element 12 is arranged in the mesh of the grid-shaped light-shielding retaining wall. The retaining wall structure 13 can absorb the light incident thereon, thereby avoiding the crosstalk problem between the light outputs of two adjacent light-emitting elements 12 and improving the display effect of the display panel.

[0024] Further, such as Figure 2As shown, the light-shielding retaining wall 13 includes a first retaining wall section 131 and a second retaining wall section 132 that are connected to each other, the first retaining wall section 131 is located on the side of the second retaining wall section 132 away from the substrate 11, wherein the first retaining wall section 131 includes a first side surface 1311 close to the side of the light-emitting element 12, and the second retaining wall section 132 includes a second side surface 1322 close to the side of the light-emitting element 12, and the angle between the first side surface 1311 and the plane where the substrate 11 is located is smaller than the angle between the second side surface 1322 and the plane where the substrate 11 is located. Specifically, in the prior art, retaining walls are generally integral structures, and the slope of the side surfaces of the retaining wall structures is consistent. However, in the embodiment of the present invention, the retaining wall structure 13 includes a first retaining wall section 131 and a second retaining wall section 132, and the angle between the first side surface 1311 and the plane of the substrate 11 is smaller than the angle between the second side surface 1322 and the plane of the substrate 11. That is, the slope of the first retaining wall section 131 is smaller than the slope of the second retaining wall section 132. In this way, along the direction parallel to the plane of the substrate 11 (as shown in the Y direction in the figure), the width of the second retaining wall section 132 can be reduced, thereby leaving more space for the light-emitting elements 12 to be installed, facilitating the installation of more light-emitting elements 12 on one side of the substrate 11, thereby increasing the distribution density of the light-emitting elements in the display panel and realizing a high-resolution display panel. At the same time, along the thickness direction of the display panel (as shown in the X direction in the figure), the cover panel of the first retaining wall section 131 is smaller than or equal to the cover panel of the second retaining wall section 132, that is, the retaining wall structure 13 has a "small at the top and large at the bottom" structure. Since the retaining wall structure is generally etched from top to bottom in the manufacturing process, the "small at the top and large at the bottom" retaining wall structure facilitates the retaining wall structure 13 to be formed at one time through a mask process, and the manufacturing process of the retaining wall structure 13 is simple.

[0025] It should be noted that the embodiment of the present invention may further include other structures required to ensure the normal operation of the display panel, which will not be detailed here.

[0026] In summary, the display panel provided by the embodiments of the present invention reduces the width of the second retaining wall in the retaining wall structure by setting the angle between the first side surface and the plane of the substrate smaller than the angle between the second side surface and the plane of the substrate. This allows more space for the light-emitting elements to be installed, thereby increasing the distribution density of the light-emitting elements, thereby achieving a high-resolution display panel and ensuring a better display effect. At the same time, along the thickness direction of the display panel, the cover panel of the first retaining wall section is smaller than or equal to the cover panel of the second retaining wall section. This "smaller at the top and larger at the bottom" retaining wall structure ensures a simple manufacturing process for the retaining wall structure.

[0027] Figure 3 yes Figure 1 Another cross-sectional structure diagram along the A-A' direction, see Figure 3The display panel 10 further includes a light adjustment structure 14 disposed on the first side surface 1311 . The light adjustment structure 14 is used to adjust the light emission direction of the light incident on the first side surface 1311 .

[0028] Specifically, the light adjustment structure 14 is arranged on the first side surface 1311, that is, the light adjustment structure is arranged on the first baffle section 131 between two adjacent light-emitting elements 12, which can avoid crosstalk between the light output of adjacent light-emitting elements 12. At the same time, by arranging the light adjustment structure 14 on the first baffle section 131, the light originally emitted by the light-emitting element 12 to the first baffle section 131 is reflected by the light adjustment structure 14, and the lateral light is reflected to the front viewing angle, thereby improving the light output efficiency of the light-emitting element 12 and ensuring a better display effect of the display panel.

[0029] Figure 4 yes Figure 1 Another cross-sectional structure diagram along the A-A' direction, see Figure 4 , in the thickness direction of the display panel, the coverage area of the first retaining wall section 131 is equal to the coverage area of the second retaining wall section 132 .

[0030] For example, by setting the coverage area of the first retaining wall section 131 to be equal to the coverage area of the second retaining wall section 132, for example, the second retaining wall section 132 can be set to be a rectangle, such as Figure 4 As shown, the width of the first retaining wall section 131 is equal to the width of the second retaining wall section 132. This can further reduce the width of the second retaining wall section 132, leaving more space for the installation of the light-emitting elements 12, thereby further improving the distribution density of the light-emitting elements 12 and achieving a high-resolution display panel. This also ensures that the manufacturing process of the retaining wall structure 13 is simple. Furthermore, in other embodiments, the second retaining wall section 132 can be configured as an inverted trapezoid. This structure also leaves more space for the installation of the light-emitting elements 12, thereby further improving the distribution density of the light-emitting elements 12. The present invention is not specifically limited to this.

[0031] The following describes in detail the height setting method of each part of the retaining wall structure in combination with different types of light-emitting elements.

[0032] Figure 5 yes Figure 1 A schematic diagram of a cross-sectional structure along the B-B' direction, see Figure 5 The light emitting element 12 includes a first color light emitting element 121, and the light emitting pattern of the first color light emitting element 121 is Lambertian;

[0033] The retaining wall structure 13 includes a first retaining wall structure 133 surrounding the first color light-emitting element 121. The first retaining wall structure 133 includes a first A retaining wall section 1331 and a second A retaining wall section 1332. The first A retaining wall section includes a first A side surface 1331a adjacent to the first color light-emitting element 121. The first color light-emitting element 121 includes a first side light-emitting surface 1211 adjacent to the first retaining wall structure 133. The maximum incident angle of light emitted from the first side light-emitting surface 1211 incident on the first A side surface 1331a is α2, and the minimum incident angle is α1.

[0034] The height of the first retaining wall structure 133 is H1, the height of the second retaining wall section 1332 is H2, the angle between the first side surface 1331a and the plane of the substrate 11 is β1, and the height of the first color light emitting element is h1, wherein,

[0035] Exemplarily, the first color light-emitting element 121 can be a red light-emitting element. Since the light-emitting layer of the red light-emitting element has strong absorption and the side wall light emission is relatively weak, its light emission type is Lambertian, that is, the brightness is the same at all viewing angles. Therefore, the side light emission of the first color light-emitting element 121 can be approximated as the upper surface light emission of the light-emitting element. At this time, the light emitted by the first side light-emitting surface 1211 of the first color light-emitting element 121 can be approximated as being emitted from the top of the first side light-emitting surface 1211, as shown in FIG. Figure 5The light emission path is shown in FIG. Furthermore, the light emitted from the top of the first side light emitting surface 1211 is incident on the first A side surface 1331a. The first A side surface 1331a may be provided with a light adjustment structure 14. To ensure that this portion of light is reflected by the light adjustment structure 14 on the first A side surface 1331a and reflects the side light to a positive viewing angle, it is necessary to satisfy the maximum incident angle α2 and the minimum incident angle α1 of the light emitted from the first side light emitting surface 1211. The light incident at the maximum incident angle α2 of the first A side surface 1331a corresponds to the height of the bottom surface of the first A retaining wall section 1331, and the light incident at the minimum incident angle α1 of the first A side surface 1331a corresponds to the height of the top surface of the first A retaining wall section 1331. Since the first retaining wall structure 133 includes a first A retaining wall section 1331 and a second A retaining wall section 1332, wherein the first A retaining wall section 1331 is located on the side of the second A retaining wall section 1332 away from the substrate 11, the minimum incident angle α1 determines the height H1 of the first retaining wall structure 133, and the maximum incident angle α2 determines the height H2 of the second A retaining wall section 1332. From the triangular functional relationship, it can be seen that the height H1 of the first retaining wall structure 133, the height H2 of the second A retaining wall section 1332, the height h1 of the first color light-emitting element 121, the angle β1 between the first A side surface 1331a and the plane of the substrate 11, and the maximum incident angle α2 and the minimum incident angle α1 satisfy the following conditions:

[0036]

[0037] According to the above formula, the height H1 of the first retaining wall structure 133 and the height H2 of the second retaining wall section 1332 can be obtained based on the angle β1 between the first A side surface 1331a and the plane where the substrate 11 is located, the height h1 of the first color light-emitting element 121, the maximum incident angle α2 and the minimum incident angle α1 of the side light of the first color light-emitting element 121 relative to the first A retaining wall section 1331. Through this height setting, it can be ensured that the side light of the first color light-emitting element 121 is reflected by the light adjustment structure 14 and then emitted from the positive viewing angle of the first color light-emitting element 121, thereby improving the light output efficiency of the first color light-emitting element 121 and ensuring a better display effect of the display panel.

[0038] It should be noted that the maximum angle of incidence of the light emitted from the first side light emitting surface 1211 incident on the first side surface A 1331a is α2, and the minimum angle of incidence is α1. The maximum and minimum angles of incidence herein are described using the angle between the light emitted from the first side light emitting surface 1211 and the normal light emitting viewing angle direction of the first color light emitting element (e.g., the dotted line direction in the figure) as an example. The maximum and minimum angles of incidence are also defined in this manner in subsequent embodiments and will not be further described.

[0039] The above embodiment is described by taking the light emitting element as the first color light emitting element as an example. The following embodiment is described by taking the light emitting element as the second color light emitting element as an example.

[0040] Figure 6 yes Figure 1 Another cross-sectional structure diagram along the B-B' direction, see Figure 6 The light-emitting element 12 includes a second-color light-emitting element 122, and the light-emitting pattern of the second-color light-emitting element 122 is a batwing shape. The retaining wall structure 13 includes a second retaining wall structure 134 surrounding the second-color light-emitting element 122. The second retaining wall structure 134 includes a first B retaining wall section 1341 and a second B retaining wall section 1342. The first B retaining wall section 1341 includes a first B side surface 1341a close to the second-color light-emitting element 122. The second-color light-emitting element 122 includes a second side light-emitting surface 1221 close to the second retaining wall structure 134. The maximum incident angle of light emitted by the second side light-emitting surface 1221 incident on the first B side surface 1341a is α4, and the minimum incident angle is α3. The height of the second retaining wall structure 134 is H3, the height of the second A retaining wall section 1332 is H4, the angle between the first B side surface 1341a and the plane of the substrate 11 is β2, and the height of the second-color light-emitting element 122 is h2.

[0041] Where n>1.

[0042] Exemplarily, the second color light-emitting element 122 can be a blue light-emitting element and / or a green light-emitting element. Since the light-emitting layer of the blue light-emitting element and / or the green light-emitting element has weak absorption, the side wall light emission is relatively strong, and its light emission type is bat-wing type, that is, the light emission intensity first increases with the viewing angle, and after reaching a certain viewing angle, the light emission intensity decreases rapidly, and the curve is like a bat wing. Therefore, the second color light-emitting element 122 has side light emission.

[0043] The following embodiment is described by taking the side light emission of the second color light emitting element 122 as an example of emitting light from the middle portion of the second side light emitting surface 1221. Figure 6As shown in the light emission path, the light emitted from the second side light emitting surface 1221 is incident on the first B side surface 1341a. The first B side surface 1341a is provided with a light adjustment structure 14. In order to ensure that this part of the light is reflected by the light adjustment structure 14 on the first B side surface 1341a, the side light is reflected to the positive viewing angle. Therefore, it is necessary to meet the maximum incident angle α4 and the minimum incident angle α3 of the light emitted from the second side light emitting surface 1221. The light incident at the maximum incident angle α4 of the first B side surface 1341a corresponds to the height of the bottom surface of the first B retaining wall section 1341, and the light incident at the minimum incident angle α3 of the first B side surface 1341a corresponds to the height of the bottom surface of the first B retaining wall section 1341. The height of the top surface of the B retaining wall section 1341. Since the second retaining wall structure 134 includes the first B retaining wall section 1341 and the second B retaining wall section 1342, the first B retaining wall section 1341 is located on the side of the second B retaining wall section 1342 away from the substrate 11. Therefore, the minimum incident angle α3 determines the height H3 of the second retaining wall structure 134, and the maximum incident angle α4 determines the height H4 of the second B retaining wall section 1342. From the functional relationship of the triangle, it can be seen that the height H3 of the second retaining wall structure 134 and the height H4 of the second B retaining wall section 1342 are also related to the height h2 of the second color light-emitting element 122 and the angle β2 between the first B side surface 1341a and the plane where the substrate 11 is located. In addition, since the side light emission of the second color light-emitting element 122 is emitted from the middle part of the second side light-emitting surface 1221, the height H3 of the second retaining wall structure 134, the height H4 of the second B retaining wall section 1342, the height h2 of the second color light-emitting element 122, the angle β2 between the first B side surface 1341a and the plane of the substrate 11, the maximum incident angle α2, and the minimum incident angle α1 can be set to meet the following requirements:

[0044]

[0045] Wherein, n>1, and the specific value of n is related to the light emitting position of the second side light emitting surface 1221. When the second side light emitting surface 1221 can be equivalent to emitting light from the center, n=2. In other embodiments, n=3 can also be set. In this case, the side light of the second color light emitting element 122 is emitted from one-third of the second side light emitting surface 1221. Since the side light of the second color light emitting element 122 may exist at various positions on the second side light emitting surface 1221, it is necessary to satisfy n>1. The embodiments of the present invention do not limit the specific value of n.

[0046] According to the above formula, the height H3 of the second retaining wall structure 134 and the height H4 of the second B retaining wall section 1342 can be obtained based on the angle β2 between the first B side surface 1341a and the plane where the substrate 11 is located, the height h2 of the second color light-emitting element 122, the maximum incident angle α4 and the minimum incident angle α3 of the side light of the second color light-emitting element 122 relative to the first B retaining wall section 1341. Therefore, by setting this height, it can be ensured that the side light of the second color light-emitting element 122 is reflected by the light adjustment structure 14 and then emitted from the positive viewing angle of the second color light-emitting element 122, which can improve the light output efficiency of the second color light-emitting element 122 and ensure a better display effect of the display panel.

[0047] Based on the above embodiments, different implementations including both first color light emitting elements and second color light emitting elements are described in detail below.

[0048] Figure 7 yes Figure 1 A schematic diagram of a cross-sectional structure along the C-C' direction, see Figure 7 The light-emitting element 12 includes a first color light-emitting element 121 and a second color light-emitting element 122. The light-emitting light type of the first color light-emitting element 121 is Lambertian, and the light-emitting light type of the second color light-emitting element 122 is batwing. The retaining wall structure 13 includes a first retaining wall structure 133 surrounding the first color light-emitting element 121 and a second retaining wall structure 134 surrounding the second color light-emitting element 122. The first retaining wall structure 133 includes a first A retaining wall section 1331, and the second retaining wall structure 134 includes a first B retaining wall section 1341. The first A retaining wall section 1331 includes a first A side surface 1331a, and the first B retaining wall section 1341 includes a first B side surface 1341a. The angle between the first A side surface 1331a and the plane where the substrate 11 is located is smaller than the angle between the first B side surface 1341a and the plane where the substrate 11 is located.

[0049] Exemplarily, the first color light-emitting element 121 may be a red light-emitting element, and the second color light-emitting element 122 may be a blue light-emitting element and / or a green light-emitting element. Since the light emission pattern of the first color light-emitting element 121 is Lambertian and the light emission pattern of the second color light-emitting element 122 is batwing, the side emission of the first color light-emitting element 121 is similar to the light emission from the upper surface of the light-emitting element, with a higher light emission point, while the second color light-emitting element 122 has side emission, for example, the side emission is the light emission from the middle part of the first side light-emitting surface, with a lower light emission point. If the slopes of the first side surface A 1331a and the first side surface B 1341a are the same, after reflection by the light adjustment structure 14, the light emission angles of the first color light-emitting element 121 and the second color light-emitting element 122 will be different. Therefore, the embodiment of the present invention creatively sets the slope of the first A side 1331a corresponding to the first color light-emitting element 121 to be gentle, and the slope of the first B side 1341a corresponding to the second color light-emitting element 122 to be steeper, that is, the angle between the first A side 1331a and the plane where the substrate 11 is located is smaller than the angle between the first B side 1341a and the plane where the substrate 11 is located, so as to ensure that the first color light-emitting element 121 and the second color light-emitting element 122 have the same or similar light output angles, thereby ensuring that the display effect of the display panel is well balanced.

[0050] Based on the above embodiments, continue to refer to Figure 7 The first retaining wall structure 133 has the same height as the second retaining wall structure 134 , the first retaining wall section A 1331 has the same height as the first retaining wall section B 1341 , and the first color light emitting element 121 has the same height as the second color light emitting element 122 .

[0051] Specifically, while setting the angle between the first A side surface 1331a and the plane where the substrate 11 is located to be smaller than the angle between the first B side surface 1341a and the plane where the substrate 11 is located, so as to ensure that the first color light-emitting element 121 and the second color light-emitting element 122 have the same or similar light-emitting effects, the first retaining wall structure 133 and the second retaining wall structure 134 can also be set to have the same height, the first A retaining wall section 1331 and the first B retaining wall section 1341 can be set to have the same height, and the first color light-emitting element 121 and the second color light-emitting element 122 can be set to have the same height, so that the setting method of the retaining wall structure and the light-emitting element is simple, and the preparation process of the display panel is simple.

[0052] In another embodiment, Figure 8 This Figure 1 Another cross-sectional structure diagram along the C-C' direction, see Figure 8The light-emitting element 12 includes a first color light-emitting element 121 and a second color light-emitting element 122. The light-emitting light pattern of the first color light-emitting element 121 is Lambertian, and the light-emitting light pattern of the second color light-emitting element 122 is batwing. The height of the first color light-emitting element 121 is less than the height of the second color light-emitting element 122.

[0053] Exemplarily, the first color light emitting element 121 may be a red light emitting element, and the second color light emitting element 122 may be a blue light emitting element and / or a green light emitting element. Since the light emitting pattern of the first color light emitting element 121 is Lambertian and the light emitting pattern of the second color light emitting element 122 is batwing, the side light emission of the first color light emitting element 121 is similar to the light emission from the upper surface of the light emitting element, and the light emission point is higher, while the second color light emitting element 122 has side light emission, for example, the side light emission is the light emission from the middle part of the first side light emitting surface, and the light emission point is lower. If the first color light emitting element 121 and the second color light emitting element 122 are the same height, the light emission points of the first color light emitting element 121 and the second color light emitting element 122 will be different, and then after being reflected by the light adjustment structure 14 on the surface of the retaining wall structure 13, the light emission viewing angles of the light emitting elements of different colors will be different. Therefore, by setting a heightening structure 15 between the second color light-emitting element 122 and the substrate 11, the height of the light-emitting point of the second color light-emitting element 122 is adjusted so that the light-emitting points of the first color light-emitting element 121 and the second color light-emitting element 122 are the same, ensuring that the first color light-emitting element 121 and the second color light-emitting element 122 have the same or similar light-emitting effects, and ensuring that the light emission balance of the display panel is good.

[0054] On the basis of the above embodiment, continue to refer to Figure 8 The retaining wall structure 13 includes a first retaining wall structure 133 surrounding the first color light-emitting element 121 and a second retaining wall structure 134 surrounding the second color light-emitting element 122. The first retaining wall structure 133 includes a first A retaining wall section 1331 and a second A retaining wall section 1332. The second retaining wall structure 134 includes a first B retaining wall section 1341 and a second B retaining wall section 1342. The first A retaining wall section 1331 includes a first A side surface 1331a, and the first B retaining wall section 1341 includes a first B side surface 1341a. The first retaining wall structure 133 and the second retaining wall structure 134 have the same height. The first A retaining wall section 1331 and the first B retaining wall section 1341 have the same height. The angle between the first A side surface 1331a and the plane where the substrate 11 is located is equal to the angle between the first B side surface 1341a and the plane where the substrate 11 is located.

[0055] Specifically, by setting a heightening structure 15 between the second color light-emitting element 122 and the substrate 11 to adjust the height of the light-emitting point of the second color light-emitting element 122, on the basis of ensuring that the light-emitting points of the first color light-emitting element 121 and the second color light-emitting element 122 are the same, the first retaining wall structure 133 and the second retaining wall structure 134 are set to have the same height, the first A retaining wall section 1331 and the first B retaining wall section 1341 are set to have the same height, and the first A side surface 1331a and the first B side surface 1341a have the same slope, so that the setting method of the retaining wall structure 13 is simple and the preparation process of the display panel is simple.

[0056] In yet another embodiment, Figure 9 This Figure 1 Another cross-sectional structure diagram along the C-C' direction, see Figure 9 The light-emitting element 12 includes a first color light-emitting element 121, the light output type of the first color light-emitting element 121 is Lambertian, the retaining wall structure 13 includes a first retaining wall structure 133 surrounding the first color light-emitting element 121, and the cross-sectional shape of the first retaining wall structure 133 includes a rectangle.

[0057] Specifically, since the light emission pattern of the first color light-emitting element 121 is Lambertian, i.e., the side emission of the first color light-emitting element 121 is similar to the emission from the top surface of the light-emitting element, there is no need to provide a light adjustment structure for the first color light-emitting element 121 to reflect the side light in the normal viewing direction. Therefore, the first retaining wall structure 133 can be made into a rectangular shape, etc., which simplifies the configuration of the retaining wall structure, reduces the manufacturing process, and saves costs. Furthermore, the rectangular cross-sectional shape of the first retaining wall structure 133 can ensure that the width of the first retaining wall structure 133 is relatively small, thereby leaving more space for the light-emitting elements, thereby increasing the distribution density of the light-emitting elements and achieving a high-resolution display panel.

[0058] Continue to refer Figure 9 The light-emitting element 12 also includes a second color light-emitting element 122, and the light output pattern of the second color light-emitting element 122 is a batwing shape. The retaining wall structure 13 also includes a second retaining wall structure 134 surrounding the second color light-emitting element 122. The second retaining wall structure 134 includes a first retaining wall section and a second retaining wall section. It can be understood that the first retaining wall section of the second retaining wall structure 134 is a first B retaining wall section 1341, and the second retaining wall section of the second retaining wall structure 134 is a second B retaining wall section 1342. The height of the first retaining wall structure 133 is the same as the height of the second retaining wall structure 134.

[0059] Specifically, since the light emission type of the second color light-emitting element 122 is a batwing shape, that is, the luminous intensity first increases with the viewing angle, and after reaching a certain viewing angle, the luminous intensity decreases rapidly, and the curve is shaped like a batwing. At this time, the second color light-emitting element 122 has side light emission, and it is necessary to use the light adjustment structure 14 to reflect the side light to the front viewing angle to improve the light emission efficiency of the second color light-emitting element 122 and ensure a better display effect of the display panel. Therefore, at this time, a second retaining wall structure 134 can be provided to include a first retaining wall section and a second retaining wall section, and then by providing a light adjustment structure 14 on the surface of the first retaining wall section, the light adjustment structure 14 can be used to adjust the side light emission of the second color light-emitting element 122 to improve the light emission efficiency of the first color light-emitting element 121. In addition, by setting the height of the first retaining wall structure 133 to be the same as the height of the second retaining wall structure 134, the setting method and preparation process of the retaining wall structure 13 can be simplified.

[0060] Based on the above embodiment, the light emitting element 12 may include a micro light emitting diode, such as a micro-LED, which has a small size and high spatial integration, and is convenient for realizing a high-resolution display panel, thereby ensuring a better display effect of the display panel.

[0061] Based on the same inventive concept, an embodiment of the present invention further provides a display device 1 . Figure 10 Schematic diagram of the structure of a display device provided by an embodiment of the present invention. Figure 10 As shown, the display device 1 includes the display panel 10 of the above embodiment. The display device 1 includes the display panel 10 of any embodiment of the present invention. Therefore, the display device provided by the embodiment of the present invention has the corresponding beneficial effects of the display panel provided by the embodiment of the present invention, which will not be described in detail here. Exemplarily, the display device can be an electronic device such as a mobile phone, a computer, a smart wearable device (for example, a smart watch), and an in-vehicle display device, which is not limited in the embodiment of the present invention.

[0062] Note that the above are only preferred embodiments of the present invention and the technical principles employed. Those skilled in the art will appreciate that the present invention is not limited to the specific embodiments herein, and that various obvious changes, readjustments, combinations, and substitutions are possible for those skilled in the art without departing from the scope of the present invention. Therefore, although the present invention has been described in detail through the above embodiments, the present invention is not limited to the above embodiments and may include many other equivalent embodiments without departing from the scope of the present invention. The scope of the present invention is determined by the scope of the appended claims.

Claims

1. A display panel, characterized in that: It comprises a substrate, a light-emitting element and a retaining wall structure arranged on one side of the substrate, wherein the retaining wall structure surrounds the light-emitting element; At least part of the retaining wall structure includes a first retaining wall section and a second retaining wall section connected to each other, wherein the first retaining wall section is located on a side of the second retaining wall section away from the base plate; The first retaining wall section includes a first side surface close to the light-emitting element, and the second retaining wall section includes a second side surface close to the light-emitting element. The angle between the first side surface and the plane where the substrate is located is smaller than the angle between the second side surface and the plane where the substrate is located. In addition, along the thickness direction of the display panel, the coverage area of the first retaining wall section is smaller than or equal to the coverage area of the second retaining wall section. The light emitting element comprises a first color light emitting element, and the light emitting pattern of the first color light emitting element is Lambertian; The retaining wall structure includes a first retaining wall structure surrounding the first color light-emitting element, the first retaining wall structure includes a first A retaining wall section and a second A retaining wall section, the first A retaining wall section includes a first A side surface close to the first color light-emitting element, the first color light-emitting element includes a first side light-emitting surface close to the first retaining wall structure, the maximum incident angle of light emitted by the first side light-emitting surface incident on the first A side surface is α2, and the minimum incident angle is α1; The height of the first retaining wall structure is H1, the height of the second retaining wall section is H2, the angle between the first side surface A and the plane of the substrate is β1, and the height of the first color light emitting element is h1; in, 2. The display panel according to claim 1, wherein: The display panel further includes a light adjustment structure disposed on the first side surface, and the light adjustment structure is used to adjust a light emitting direction of light incident on the first side surface.

3. The display panel according to claim 1, wherein: Along the thickness direction of the display panel, the coverage area of the first retaining wall section is equal to the coverage area of the second retaining wall section.

4. The display panel according to claim 1, wherein: The light emitting element includes a second color light emitting element, and the light emitting pattern of the second color light emitting element is a batwing shape; The retaining wall structure includes a second retaining wall structure surrounding the second color light-emitting element, the second retaining wall structure includes a first B retaining wall section and a second B retaining wall section, the first B retaining wall section includes a first B side surface close to the second color light-emitting element, the second color light-emitting element includes a second side light-emitting surface close to the second retaining wall structure, and the maximum incident angle of light emitted by the second side light-emitting surface incident on the first B side surface is α4, and the minimum incident angle is α3; The height of the second retaining wall structure is H3, the height of the second B retaining wall section is H4, the angle between the first B side surface and the plane of the substrate is β2, and the height of the second color light emitting element is h2; in, Where n>

1.

5. The display panel according to claim 1, wherein: The light emitting element further includes a second color light emitting element, and the light emitting pattern of the second color light emitting element is a batwing shape; The retaining wall structure further includes a second retaining wall structure surrounding the second color light emitting element; The second retaining wall structure includes a first B retaining wall section; The first B retaining wall section includes a first B side surface, and an angle between the first A side surface and the plane where the base plate is located is smaller than an angle between the first B side surface and the plane where the base plate is located.

6. The display panel according to claim 5, wherein: The first retaining wall structure and the second retaining wall structure have the same height; The first retaining wall section A and the first retaining wall section B have the same height; The first color light emitting element and the second color light emitting element have the same height.

7. The display panel according to claim 1, wherein: The light emitting element further includes a second color light emitting element, and the light emitting pattern of the second color light emitting element is a batwing shape; The height of the first color light emitting element is smaller than the height of the second color light emitting element.

8. The display panel according to claim 7, wherein: The retaining wall structure further includes a second retaining wall structure surrounding the second color light emitting element; the second retaining wall structure includes a first retaining wall section and a second retaining wall section; The first B retaining wall section includes a first B side; The first retaining wall structure and the second retaining wall structure have the same height; The first retaining wall section A and the first retaining wall section B have the same height; The angle between the first side surface A and the plane where the substrate is located is equal to the angle between the first side surface B and the plane where the substrate is located.

9. The display panel according to claim 1, wherein: The cross-sectional shape of the first retaining wall structure includes a rectangle.

10. The display panel according to claim 9, wherein: The light emitting element further includes a second color light emitting element, and the light emitting pattern of the second color light emitting element is a batwing shape; The retaining wall structure further includes a second retaining wall structure surrounding the second color light emitting element, and the second retaining wall structure includes the first retaining wall section and the second retaining wall section; The height of the first retaining wall structure is the same as the height of the second retaining wall structure.

11. The display panel according to claim 1, wherein The light emitting element further includes a second color light emitting element, and the light emitting pattern of the second color light emitting element is a batwing shape; The first color light emitting element includes a red light emitting element, and the second color light emitting element includes a green light emitting element and / or a blue light emitting element.

12. The display panel according to claim 1, wherein The light emitting element includes a micro light emitting diode.

13. A display device, characterized in that: The display panel comprises the display panel according to any one of claims 1 to 12.

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