Display panel, manufacturing method thereof and display device

Abstract

The invention provides a display panel and a manufacturing method thereof and a display device, and relates to the technical field of display, the display panel and the display device comprise a substrate, a driving layer arranged on one side of the substrate, and a light-emitting element and a retaining wall which are arranged on one side, away from the substrate, of the driving layer; the retaining walls are at least located between the adjacent light-emitting elements. The display panel further comprises a first reflecting layer and a second reflecting layer. The first reflecting layer is located on the side, facing the driving layer, of the epitaxial layer of the light-emitting element. The second reflecting layer is located on the side wall, facing the light-emitting element, of the retaining wall, and / or the second reflecting layer is located on the side wall of the light-emitting element. By introducing the first reflecting layer and the second reflecting layer, light rays which are emitted by the light-emitting element and cannot be emitted to the light-emitting surface of the display panel originally can be reflected, so that the light rays are emitted to the light-emitting surface of the display panel, the actual brightness of the light-emitting element can be improved, and the overall display brightness of the display panel can be improved.

Description

Technical Field

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

[0002] With the continuous development of science and technology, more and more display products, such as mobile phones, tablets, laptops and smart wearable devices, 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] For display products equipped with micro-light-emitting devices (Micro LED), due to the limitations of the small-size Micro LED structure itself, there is a common problem of low brightness. Summary of the invention

[0004] In order to solve the above technical problems, the present disclosure provides a display panel and a manufacturing method thereof, and a display device, aiming to improve the overall brightness of the display product and enhance the display effect.

[0005] In a first aspect, the present disclosure provides a display panel, comprising a substrate, a driving layer disposed on one side of the substrate, and a light-emitting element and a blocking wall disposed on a side of the driving layer away from the substrate, wherein the blocking wall is at least located between adjacent light-emitting elements in a direction parallel to a plane where the substrate is located;

[0006] The display panel further includes a first reflective layer and a second reflective layer, wherein the first reflective layer is located on a side of the epitaxial layer of the light emitting element facing the driving layer;

[0007] The second reflective layer is located on a side wall of the blocking wall facing the light emitting element, and / or the second reflective layer is located on a side wall of the light emitting element.

[0008] In a second aspect, the present disclosure provides a method for manufacturing a display panel, comprising:

[0009] Providing a substrate, and manufacturing a driving layer on one side of the substrate, wherein a side of the driving layer facing away from the substrate includes a connecting pad;

[0010] A light emitting element is bound to a side of the driving layer facing away from the substrate, so that the light emitting element is electrically connected to the connection pad, and a first reflective layer is provided on a side of the epitaxial layer of the light emitting element facing the driving layer;

[0011] Making a retaining wall, wherein the retaining wall is located between adjacent light-emitting elements;

[0012] forming a flat layer at least between the retaining wall and the light emitting element;

[0013] The second reflective layer is manufactured so that the second reflective layer is located on the side wall of the blocking wall facing the light emitting element, and / or the second reflective layer is located on the side wall of the light emitting element.

[0014] In a third aspect, the present disclosure provides a display device, comprising the display panel provided in the first aspect of the present disclosure.

[0015] Compared with the prior art, the technical solution provided by the embodiments of the present disclosure has the following advantages:

[0016] In the display panel and its manufacturing method and display device provided by the embodiments of the present disclosure, a first reflective layer is introduced on the side of the epitaxial layer of the light-emitting element facing the substrate, and a second reflective layer is introduced on the side wall of the light-emitting element facing the baffle wall, and / or on the side wall of the light-emitting element. When the light-emitting element emits light, part of the light rays emitted toward the bottom of the light-emitting element can be emitted from the light-emitting surface of the display panel after being reflected by the first reflective layer, and part of the light rays with a large viewing angle can be emitted from the light-emitting surface of the display panel after being reflected by the second reflective layer. In this way, through the reflection of the first reflective layer and the second reflective layer, the light rays that could not originally be emitted from the light-emitting surface of the display panel are effectively utilized, so that this part of the light rays can be emitted from the light-emitting surface of the display panel, which effectively improves the light utilization rate of the light-emitting element, which is equivalent to improving the light-emitting brightness of the corresponding light-emitting element, thereby facilitating improving the overall display brightness of the display panel. BRIEF DESCRIPTION OF THE DRAWINGS

[0017] The accompanying drawings, which are incorporated in and constitute a part of this specification, illustrate embodiments consistent with the present disclosure and, together with the description, serve to explain the principles of the present disclosure.

[0018] In order to more clearly illustrate the embodiments of the present invention or the technical solutions in the prior art, the drawings required for use in the embodiments or the description of the prior art will be briefly introduced below. Obviously, for ordinary technicians in this field, other drawings can be obtained based on these drawings without paying any creative labor.

[0019] Figure 1 Shown is a planar structural diagram of a display panel provided by an embodiment of the present disclosure;

[0020] Figure 2 Shown Figure 1 An AA cross-sectional view of the display panel;

[0021] Figure 3 Shown Figure 1 Another AA cross-sectional view of the display panel;

[0022] Figure 4 Shown Figure 1 Another AA cross-sectional view of the display panel;

[0023] Figure 5 Shown is a schematic structural diagram of a light-emitting element provided in an embodiment of the present disclosure;

[0024] Figure 6 Shown Figure 2 An enlarged schematic diagram of the first reflective layer;

[0025] Figure 7 Shown Figure 2 An enlarged schematic diagram of the second reflective layer;

[0026] Figure 8 Shown Figure 2 An enlarged schematic diagram of the first reflective layer;

[0027] Fig. 9 Shown Figure 2 An enlarged schematic diagram of the second reflective layer;

[0028] Fig.10 Shown Figure 1 Another AA cross-sectional view of the display panel;

[0029] Fig.11 A diagram showing a relative position relationship between the first reflective layer and the second reflective layer in the spacer area is shown;

[0030] Fig.12 Another relative position relationship diagram of the first reflective layer and the second reflective layer in the spacer is shown;

[0031] Fig.13 Another relative position relationship diagram of the first reflective layer and the second reflective layer in the spacer is shown;

[0032] Fig.14 Another relative position relationship diagram of the first reflective layer and the second reflective layer in the spacer is shown;

[0033] Fig.15 Another relative position relationship diagram of the first reflective layer and the second reflective layer in the spacer is shown;

[0034] Fig.16 Shown Figure 1 A BB cross-sectional view of the display panel;

[0035] Fig.17 Shown Figure 1 Another BB cross-sectional view of the display panel;

[0036] Fig.18 Shown Figure 1 Another AA cross-sectional view of the display panel shown;

[0037] Fig.19Shown is a schematic diagram of a partial arrangement of light-emitting elements in a display panel;

[0038] Fig. 20 Shown is a manufacturing flow chart of a display panel provided by an embodiment of the present disclosure;

[0039] Fig.21 The figure shows a schematic diagram of forming a driving layer in the process of manufacturing a display panel;

[0040] Fig. 22 The figure shows a schematic diagram of binding light-emitting elements in the process of manufacturing a display panel;

[0041] Fig.23 Shown is a schematic diagram of forming a retaining wall in the process of manufacturing a display panel;

[0042] Fig.24 A schematic diagram showing the formation of a flat layer in the process of manufacturing a display panel;

[0043] Fig.25 A schematic diagram showing the formation of a second reflective layer in the process of manufacturing a display panel;

[0044] Fig.26 Shown is a schematic diagram of forming an encapsulation layer in the process of manufacturing a display panel;

[0045] Fig. 27 A schematic diagram showing the formation of a second reflective layer and a third reflective layer in the process of manufacturing a display panel;

[0046] Fig.28 Another schematic diagram showing the formation of the second reflective layer and the third reflective layer in the process of manufacturing the display panel;

[0047] Fig.29 Shown is a schematic structural diagram of a display device provided in an embodiment of the present disclosure. DETAILED DESCRIPTION

[0048] In order to more clearly understand the above-mentioned objectives, features and advantages of the present disclosure, the scheme of the present disclosure will be further described below. It should be noted that the embodiments of the present disclosure and the features in the embodiments can be combined with each other without conflict.

[0049] In the following description, many specific details are set forth to facilitate a full understanding of the present disclosure, but the present disclosure may also be implemented in other ways different from those described herein; it is obvious that the embodiments in the specification are only part of the embodiments of the present disclosure, rather than all of the embodiments.

[0050] Figure 1 FIG. 1 is a planar structural diagram of a display panel provided by an embodiment of the present disclosure. Figure 2Shown Figure 1 An AA cross-sectional view of the display panel is shown in the figure. Figure 3 Shown Figure 1 Another AA cross-sectional view of the display panel, Figure 4 Shown Figure 1 Another AA cross-sectional view of the display panel, Figure 5 FIG. 1 is a schematic diagram of a structure of a light emitting element provided in an embodiment of the present disclosure. Please refer to FIG. Figures 1 to 5 The embodiment of the present disclosure provides a display panel 100, including a substrate 00, a driving layer 01 disposed on one side of the substrate 00, and a light-emitting element LD and a retaining wall 10 disposed on the side of the driving layer 01 facing away from the substrate 00. The retaining wall 10 is at least located between adjacent light-emitting elements LD in a direction parallel to the plane where the substrate 00 is located. The display panel also includes a first reflective layer 21 and a second reflective layer 22, and the first reflective layer 21 is located on the side of the epitaxial layer 92 of the light-emitting element LD facing the driving layer 01. The second reflective layer 22 is located on the side wall of the retaining wall 10 facing the light-emitting element LD, and / or, the second reflective layer 22 is located on the side wall of the light-emitting element LD. That is, the first reflective layer 21 is located on the side of the epitaxial layer of the light-emitting element LD facing the driving layer 01, and the second reflective layer 22 is located on the side wall of the retaining wall 10 facing the light-emitting element LD, and / or, the first reflective layer 21 is located on the side of the epitaxial layer of the light-emitting element LD facing the driving layer 01, and the second reflective layer 22 is located on the side wall of the light-emitting element LD. The specific arrangement of the reflective layer will be described later.

[0051] It should be noted that Figure 1 The display panel with a rectangular structure is used as an example for illustration, and the actual shape of the display panel is not limited. In some other embodiments of the present disclosure, the display panel can also be embodied in any other feasible shape such as a circle, a rounded rectangle, etc. Optionally, the display panel provided in this embodiment can be a display panel using inorganic light-emitting diode display technology, such as a Micro LED display panel, or a Mini LED display panel, etc. This type of display panel has the advantages of high brightness, low power consumption, and easy splicing, and is widely used in display products. Figure 1 In the display panel shown, the arrangement and number of the light emitting elements LD are for illustration only, and the present disclosure is not limited thereto. Figure 2 , Figure 3 and Figure 4A film layer structure of the display panel is illustrated respectively, the difference is that the position of the second reflective layer 22 is different, but the actual number and size of the film layers of the display panel are not limited. In the film layer structure of the display panel, optionally, the gate of the transistor is set on the above-mentioned first metal layer m1, and the source and drain of the transistor are set on the above-mentioned second metal layer m2. The display panel also includes a semiconductor layer poly arranged on the side of the first metal layer m1 facing the substrate 00 and an auxiliary metal layer m0 arranged on the side of the semiconductor layer poly facing the substrate. It should be noted that the display panel may include a transistor with a dual-gate structure. In this case, one of the gates of the transistor may be located in the first metal layer m1, and the other gate may be located in the auxiliary metal layer m0. In the direction perpendicular to the plane where the substrate 00 is located, the first metal layer m1 and the auxiliary metal layer m0 both overlap with the semiconductor layer poly, and the auxiliary metal layer m0 also has a light-shielding function to prevent light from affecting the semiconductor layer poly. Optionally, a capacitor metal layer mc is further included between the first metal layer m1 and the second metal layer m2, and the capacitor metal layer mc can form a capacitor structure with the second metal layer m2. Optionally, a third metal layer m3 and a fourth metal layer m4 are further included on a side of the second metal layer m2 facing away from the substrate, and both the third metal layer m3 and the fourth metal layer m4 can be used for routing signal lines.

[0052] Figure 5 Only one structure of the light emitting element LD is illustrated, and the specific shape and structure of the light emitting element LD are not limited. Figure 5 The first reflective layer 21 is used as an example as a part of the light-emitting element LD. That is to say, when the light-emitting element LD is manufactured, the first reflective layer 21 is formed on one side of the epitaxial layer 92 of the light-emitting element LD. At this time, the finished light-emitting element LD itself includes the first reflective layer 21. When the display panel is manufactured, the light-emitting element LD with the first reflective layer 21 is bound to the driving layer 01. However, the present disclosure is not limited to this. In some other feasible embodiments, the light-emitting element LD and the first reflective layer 21 may also be two independent structures, that is, the finished product of the light-emitting element LD does not include the first reflective layer 21. The first reflective layer 21 may be formed on the side of the epitaxial layer 92 of the light-emitting element LD facing the substrate 00 during the process of manufacturing the display panel. Optionally, the light-emitting element LD includes an epitaxial layer 92, an n-type GaN contact layer 93, a quantum well light-emitting layer 94, and a p-type GaN contact layer 95. The two electrodes P1 and P2 of the light-emitting element LD are electrically connected to the n-type GaN contact layer 93 and the p-type GaN contact layer 95, respectively. It should be noted that Figure 5 The structure of the light emitting element LD in the figure is only for illustration and does not limit the specific structure of the light emitting element LD actually included in the display panel. Figure 5In the structure shown, the first reflective layer 21 is located on the surface of the n-type GaN contact layer 93 facing the electrode P1 and the surface of the p-type GaN contact layer 95 facing the electrode P2, and can also be located on the side of the p-type GaN contact layer 95 and the quantum well light-emitting layer 94, so as to reflect at least part of the light emitted by the quantum well light-emitting layer 94.

[0053] The present disclosure provides a light emitting element LD and a blocking wall 10 on the side of the array layer 02 facing away from the substrate 00. The blocking wall 10 is located between adjacent light emitting elements LD. In particular, the present disclosure introduces a first reflective layer 21 and a second reflective layer 22 into the display panel. The first reflective layer 21 and the second reflective layer 22 can be arranged in the following three ways:

[0054] The first possible setting method is to refer to Figure 2 , the first reflective layer 21 is located on the side of the epitaxial layer of the light emitting element LD facing the driving layer 01, and the second reflective layer 22 is located on the side wall of the blocking wall 10 facing the light emitting element LD. When the light emitting element LD emits light, the first reflective layer 21 located on the side of the epitaxial layer of the light emitting element LD facing the substrate 00 will be able to reflect the light at the bottom of the light emitting element LD, so as to increase the amount of light emitted from the front view angle of the light emitting element LD, and to a certain extent improve the brightness of the light emitting element LD. When the light of a large viewing angle emitted by the light emitting element LD is emitted to the second reflective layer 22 on the side wall of the blocking wall 10, it can be emitted to the light emitting surface of the display panel after being reflected by the second reflective layer 22, which is equivalent to effectively utilizing the light that may not be emitted from the light emitting surface of the display panel, thereby improving the effective utilization rate of the light emitted by the corresponding light emitting element LD, which is equivalent to improving the luminous brightness of the corresponding light emitting element LD, which is conducive to increasing the amount of light emitted from the light emitting surface of the display panel and improving the overall display brightness of the display panel. In this embodiment, the first reflective layer 21 and the second reflective layer 22 are respectively introduced into the bottom surface of the light-emitting element LD and the side wall of the retaining wall 10 located on the side of the light-emitting element LD. The first reflective layer 21 and the second reflective layer 22 can be used to perform all-round reflection on the bottom light and the side light of the light-emitting element LD, thereby effectively improving the reflection efficiency of the bottom light and the side light of the light-emitting element LD.

[0055] The second possible setting method is, please refer to Figure 3, the first reflective layer 21 is located on the side of the epitaxial layer of the light-emitting element LD facing the driving layer 01, and the second reflective layer 22 is located on the side wall of the light-emitting element LD. When the light-emitting element LD emits light, the first reflective layer 21 located on the side of the epitaxial layer of the light-emitting element LD facing the substrate 00 will be able to reflect the light at the bottom of the light-emitting element LD, so as to increase the amount of light emitted from the front view of the light-emitting element LD, and to a certain extent improve the brightness of the light-emitting element LD. When the second reflective layer 22 is provided on the side wall of the light-emitting element LD, the lateral light emitted by the light-emitting element LD will be emitted to the second reflective layer 22. After being reflected by the second reflective layer 22, at least part of the light can be emitted to the light-emitting surface of the display panel, which also increases the effective utilization rate of the light emitted by the light-emitting element LD, which is equivalent to improving the light-emitting brightness of the corresponding light-emitting element LD, which is beneficial to increasing the amount of light emitted from the light-emitting element LD to the light-emitting surface of the display panel, and thus is also beneficial to improving the overall display brightness of the display panel. In this embodiment, the first reflective layer 21 and the second reflective layer 22 fully wrap the bottom and side surfaces of the light-emitting element LD. The reflective structure composed of the fully wrapped first reflective layer 21 and the second reflective layer 22 can effectively improve the reflection efficiency of the light-emitting element LD in the side light and bottom light. In addition, the first reflective layer 21 and the second reflective layer 22 are directly in contact with the side surface of the light-emitting element LD, thereby avoiding the transmission loss of the light from the light-emitting element LD to the first reflective layer 21 or the second reflective layer 22.

[0056] The third possible setting method is, please refer to Figure 4, the first reflective layer 21 is located on the side of the epitaxial layer of the light emitting element LD facing the driving layer 01, and the second reflective layer 22 is located on the side wall of the blocking wall 10 facing the light emitting element LD and the side wall of the light emitting element LD. When the light emitting element LD emits light, the first reflective layer 21 located on the side of the epitaxial layer of the light emitting element LD facing the substrate 00 will be able to reflect the light at the bottom of the light emitting element LD, so as to increase the amount of light emitted from the front view of the light emitting element LD, and to a certain extent improve the brightness of the light emitting element LD. Among the light emitted from the side of the light emitting element LD, part of the light can be reflected by the second reflective layer 22 on the side wall of the light emitting element LD, and part of the light can be reflected by the second reflective layer 22 on the side wall of the blocking wall 10. The double reflection effect of the second reflective layer 22 located on the side wall of the light emitting element LD and the second reflective layer 22 located on the side wall of the blocking wall 10 is more conducive to increasing the amount of light reflected by the second reflective layer 22 to the light emitting surface of the display panel, effectively improving the light utilization rate and brightness of the corresponding light emitting element LD, thereby helping to improve the overall display brightness of the display panel. In this embodiment, the first reflection layer 21 located at the bottom of the light-emitting element LD and the second reflection layer 22 located on the side wall of the light-emitting element LD are used to fully wrap the bottom surface and the side surface of the light-emitting element LD. At the same time, the second reflection layer 22 is introduced into the side wall of the retaining wall 10 located on the side of the light-emitting element LD. By using the reflection structure composed of the first reflection layer 21 and the second reflection layer 22 that fully wrap the light-emitting element LD, the transmission loss of the light of the light-emitting element LD to the first reflection layer 21 or the second reflection layer 22 is avoided, so as to improve the reflection efficiency of the light-emitting element LD in the side light and bottom light, and further use the second reflection layer 22 located on the side wall of the retaining wall 10 to supplement the reflection of at least part of the light with a large viewing angle, so as to further improve the overall reflection efficiency.

[0057] Please continue to refer to Figure 2 In an optional embodiment of the present disclosure, the second reflective layer 22 is located on the side wall of the blocking wall 10 facing the light emitting element LD, and the thickness of the first reflective layer 21 is less than the thickness of the second reflective layer 22 .

[0058] Optionally, the first reflective layer 21 is a reflective layer provided by the light-emitting element LD, and is formed on one side of the epitaxial layer of the light-emitting element LD when the light-emitting element LD is manufactured, so that most of the light emitted by the light-emitting element LD that is directed toward the first reflective layer 21 can be reflected to the light-emitting surface of the display panel through the first reflective layer 21, thereby improving the effective utilization rate of the light emitted by the light-emitting element LD. The reflectivity of the reflective layer is related to its thickness. Within a certain thickness range, the greater the thickness, the higher the reflectivity. Since the second reflective layer 22 is formed after the light-emitting element LD is bound to the display panel, when the second reflective layer 22 is formed on the side wall of the retaining wall 10, the thickness of the second reflective layer 22 can be set to be greater than the thickness of the first reflective layer 21 in the light-emitting element LD, thereby improving the reflectivity of the second reflective layer 22, so as to further improve the effective utilization rate of the light emitted by the light-emitting element LD. In addition, when the first reflective layer 21 is a reflective layer provided by the light-emitting element LD, when the bottom side light of the light-emitting element LD is directed toward the first reflective layer 21, the transmission path is small, the light has no loss or has a small loss, which is conducive to improving the reflection efficiency of the light. Moreover, since the first reflective layer 21 is located at the bottom side of the light emitting element, the relative angle between the first reflective layer 21 and the light emitting element LD is fixed, so the reflection requirement for the first reflective layer 21 is relatively low. Considering that the second reflective layer 22 is at a certain distance from the light emitting element LD and the relative angle is not fixed, the reflection efficiency requirement for the second reflective layer 22 is relatively high. Therefore, in this embodiment, the thickness of the second reflective layer 22 is set to be greater than the thickness of the first reflective layer 21, which is beneficial to reducing additional preparation processes at the position of the first reflective layer 21 to save costs, and is beneficial to ensuring the reflectivity of the second reflective layer 22.

[0059] Optionally, the thickness of the first reflective layer 21 is 1μm≤H1≤1.5μm, the thickness of the second reflective layer 22 is 2μm≤H2≤3μm, and the reflectivity of the second reflective layer 22 is greater than or equal to 90%. When the first reflective layer 21 is part of the light emitting element LD, for the light emitting element LD, if the thickness of the first reflective layer 21 is too large, for example, greater than 1.5μm, the overall thickness of the light emitting element LD will be increased, which is not conducive to the miniaturization design of the light emitting element LD; and if the thickness of the first reflective layer 21 is set too small, for example, less than 1μm, the first reflective layer 21 has a poor reflection effect on light. Therefore, the embodiment of the present disclosure sets the thickness of the first reflective layer 21 to 1μm to 1.5μm, which can meet the miniaturization requirements of the light emitting element LD and the reflection requirements of the light emitted by the light emitting element LD, so that more light directed to the first reflective layer 21 can be directed to the light emitting surface of the display panel. Optionally, H1 may be 1.2 μm, 1.4 μm, etc., which is not specifically limited in the present disclosure.

[0060] In addition, considering that the second reflective layer 22 is made after the light emitting element LD is bound, the thickness of the second reflective layer 22 can be set to be greater than the thickness of the first reflective layer 21, so that the thickness is greater than or equal to 2 μm, thereby effectively improving the reflectivity of the second reflective layer 22. Considering that the second reflective layer 22 is deposited on the side wall of the retaining wall 10 facing the light emitting element LD, if it is too thick, for example, greater than 3 μm, it will affect the adhesion between the second reflective layer 22 and the side wall of the retaining wall 10, and increase the risk of separation of the second reflective layer 22 from the side wall of the retaining wall 10. Therefore, the embodiment of the present disclosure sets the thickness of the second reflective layer 22 to 2 μm to 3 μm, which can not only improve the reflectivity of the second reflective layer 22, but also help to improve the fixing reliability of the second reflective layer 22 and the side wall of the retaining wall 10.

[0061] Figure 6 Shown Figure 2 An enlarged schematic diagram of the first reflective layer 21, Figure 7 Shown Figure 2 Please refer to the enlarged schematic diagram of the second reflective layer 22 in FIG. Figure 6 and Figure 7 In an optional embodiment of the present disclosure, the first reflective layer 21 includes M groups of first Bragg reflective layers 211, and the second reflective layer 22 includes N groups of second Bragg reflective layers 222, wherein 1≤M<N, and M and N are both integers. It should be noted that, Figure 6 and Figure 7 The number of Bragg reflection layers included in the first reflection layer 21 and the second reflection layer 22 shown in the figure is only for illustration, and does not limit the number of Bragg reflection layers actually included in the first reflection layer 21 and the second reflection layer 22. Optionally, 13≤N≤17.

[0062] In this embodiment, the first Bragg reflection layer 211 and the second Bragg reflection layer 222 are both embodied as a stacked structure of two sub-film layers, for example, they may be a stacked structure of a low refractive index material and a high refractive index material, for example, a stacked structure of silicon oxide and titanium oxide, a group of first Bragg reflection layers 211 includes a layer of silicon oxide and a layer of titanium oxide, and a group of second Bragg reflection layers 222 may also include a layer of oxide and a layer of titanium oxide. Of course, in some other embodiments of the present disclosure, the Bragg reflection layer may also be embodied as a stacked structure of other low refractive index materials and high refractive index materials, for example, the high refractive index material may also be titanium nitride or magnesium fluoride, forming a stacked structure of silicon oxide and titanium nitride, or a stacked structure of silicon oxide and magnesium fluoride, which is not specifically limited in the present disclosure.

[0063] This embodiment shows a solution in which the number of groups of the first Bragg reflection layers 211 included in the first reflection layer 21 is less than the number of the second Bragg reflection layers 222 included in the second reflection layer 22. In this case, the thickness of the low refractive index material included in a group of the first Bragg reflection layers 211 can be set to be the same as the thickness of the low refractive index material included in a group of the second Bragg reflection layers 222, and the thickness of the high refractive index material included in a group of the first Bragg reflection layers 211 can be set to be the same as the thickness of the high refractive index material included in a group of the second Bragg reflection layers 222. In this way, the structure and thickness of the Bragg reflection layers in the first reflection layer 21 and the second reflection layer 22 are kept the same, and by differentially setting the number of groups of the Bragg reflection layers included in the second reflection layer 22 and the first reflection layer 21, a differentiated design of the thickness of the second reflection layer 22 and the first reflection layer 21 can be achieved, so as to improve the reflectivity of the second reflection layer 22, and further improve the effective utilization rate of the light emitted by the light emitting element LD.

[0064] Figure 8 Shown Figure 2 An enlarged schematic diagram of the first reflective layer 21, Fig. 9 Shown Figure 2 An enlarged schematic diagram of the second reflective layer 22 in this embodiment Figure 6 and Figure 7 The difference between the illustrated embodiments is that the first reflective layer 21 and the second reflective layer 22 include the same number of Bragg reflective layers but different thicknesses, and other similarities will not be described in detail.

[0065] Please refer to Figure 8 and Fig. 9 In an optional embodiment of the present disclosure, the first reflective layer 21 includes M groups of first Bragg reflective layers 211, and the second reflective layer 22 includes N groups of second Bragg reflective layers 222, wherein 1≤M=N, M and N are both integers; the thickness of the first Bragg reflective layer 211 is less than the thickness of the second Bragg reflective layer 222.

[0066] The thickness of the first Bragg reflection layer 211 mentioned in the present disclosure can be regarded as the total thickness of the high refractive index layer and the low refractive index layer in the first Bragg reflection layer 211, and the thickness of the second Bragg reflection layer 222 can be regarded as the total thickness of the high refractive index layer and the low refractive index layer in the second Bragg reflection layer 222. Alternatively, the thickness of the first Bragg reflection layer 211 can also be regarded as the sum of the thickness of the high refractive index layer and the low refractive index layer in a group of the first Bragg reflection layer 211, and the thickness of the second Bragg reflection layer 222 can be regarded as the sum of the thickness of the high refractive index layer and the low refractive index layer in a group of the second Bragg reflection layer 222. When the number of groups of Bragg reflection layers included in the first reflection layer 211 and the second reflection layer 22 is the same, the thickness of the first reflection layer 211 and the second Bragg reflection layer 22 can be designed differently to achieve the differentiated design of the thickness of the first reflection layer 21 and the second reflection layer 22, so that the thickness of the second reflection layer 22 is greater than the thickness of the first reflection layer 21, thereby improving the reflectivity of the second reflection layer 22, and further increasing the amount of light reflected by the second reflection layer 22 to the light exit surface of the display panel.

[0067] Please continue to refer to Figure 8 and Fig. 9 In an optional embodiment of the present disclosure, the first reflective layer 21 includes M groups of first Bragg reflective layers 211, and the second reflective layer 22 includes N groups of second Bragg reflective layers 222, where M≥1, N≥1, and M and N are both integers; wherein at least one first Bragg reflective layer 211 includes a first sub-reflective layer 211-a and a second sub-reflective layer 211-b, and the first sub-reflective layer 211-a and the second sub-reflective layer 211-b have different refractive indices, and / or the first sub-reflective layer 211-a and the second sub-reflective layer 211-b have different thicknesses. For any group of first Bragg reflective layers 211, the first sub-reflective layer 211-a and the second sub-reflective layer 211-b may have different refractive indices but the same thicknesses, or the first sub-reflective layer 211-a and the second sub-reflective layer 211-b may have different thicknesses but the same refractive indexes, or the first sub-reflective layer 211-a and the second sub-reflective layer 211-b may have different refractive indices and thicknesses. Thus, when light is incident on the first reflective layer 21, by setting the optical path of the light when it passes through the film layers with different refractive indices and / or thicknesses in the Bragg reflective layer, it is possible to enhance the reflection, which is beneficial to improving the light extraction efficiency of the light emitting element. In addition, the first Bragg reflective layer 211 is an insulating film layer. In this embodiment, by setting the first reflective layer 21 to include at least one group of Bragg reflective layers, it is possible to avoid affecting the signal connection of the electrodes in the light emitting element (for example, the signal connection between the two electrodes of the light emitting element), which is beneficial to ensuring the product reliability of the light emitting element.

[0068] Please continue to refer to Figure 8 and Fig. 9 In the second reflection layer 22 provided in the embodiment of the present disclosure, at least one second Bragg reflection layer 222 includes a third sub-reflection layer 222-a and a fourth sub-reflection layer 222-b, and the third sub-reflection layer 222-a and the fourth sub-reflection layer 222-b have different refractive indices, and / or the third sub-reflection layer 222-a and the fourth sub-reflection layer 222-b have different thicknesses. For any group of second Bragg reflection layers 222, the third sub-reflection layer 222-a and the fourth sub-reflection layer 222-b may have different refractive indices but the same thicknesses, or the third sub-reflection layer 222-a and the fourth sub-reflection layer 222-b may have different thicknesses but the same refractive index, or the third sub-reflection layer 222-a and the fourth sub-reflection layer 222-b may have different refractive indices and thicknesses. Thus, when light is incident on the second reflective layer 22, by setting the optical path of the light when it passes through film layers with different refractive indices and / or thicknesses in the Bragg reflective layer, the reflection can be enhanced, which is beneficial to improving the light extraction efficiency of the light emitting element.

[0069] Please refer to Figure 4 In an optional embodiment of the present disclosure, the distance between the surface of the baffle wall 10 facing away from the substrate 00 and the substrate 00 is h1; the distance between the surface of the light-emitting element LD facing away from the substrate 00 and the substrate 00 is h2, wherein h1≥h2. That is to say, on the side of the array layer 02 facing away from the substrate 00, the upper surface of the baffle wall 10 exceeds the upper surface of the light-emitting element LD or is flush with the upper surface of the light-emitting element LD. In this way, when the light-emitting element LD emits light, the second reflective layer 22 located on the side wall of the baffle wall 10 can receive a larger amount of light with a large viewing angle emitted by the light-emitting element LD, and the amount of light reflected by the second reflective layer 22 to the light-emitting surface of the display panel will be more, thereby being more conducive to improving the overall brightness of the display panel. In addition, setting the upper surface of the baffle wall 10 to be higher than the upper surface of the light-emitting element LD is also conducive to blocking the large viewing angle light between light-emitting elements LD of different colors, thereby helping to avoid the problem of display color mixing.

[0070] Fig.10 Shown Figure 1 Another AA cross-sectional view of the display panel is shown in FIG. 1 . The difference from the above embodiment is that a second reflective layer 22 is also provided on the surface of the retaining wall 10 facing away from the substrate 00. Please refer to FIG. Fig.10 In an optional embodiment of the present disclosure, the second reflective layer 22 is also located on the surface of the retaining wall 10 facing away from the substrate 00 .

[0071] In the display panel, before the light emitted by the light emitting element LD is emitted to the light emitting surface of the display panel, some scattered light may exist between the light emitting element LD and the light emitting surface of the display panel, and this part of the light cannot be emitted from the light emitting surface of the display panel. When the second reflective layer 22 is introduced into the surface of the baffle 10 away from the substrate 00 (i.e., the upper surface of the baffle 10), when the scattered light is emitted to the second reflective layer 22, at least part of the light can be emitted to the light emitting surface of the display panel after being reflected by the second reflective layer 22, thereby facilitating the effective use of the light originally lost, and facilitating further improving the overall brightness of the display panel.

[0072] Please continue to refer to Fig.10 In an optional embodiment of the present disclosure, the display panel also includes a flat layer 30, which is located at least between the blocking wall 10 and the light-emitting element LD along a direction parallel to the substrate 00; and is located on a side of the first reflective layer 21 facing the substrate 00 along a direction perpendicular to the substrate 00.

[0073] After the retaining wall 10 is made on the side of the array layer 02 away from the substrate 00 and the light emitting element LD is bound, there may be gaps between the retaining wall 10 and the light emitting element LD, and between the two electrodes of the light emitting element LD. In this case, a flat layer 30 may be filled in these areas. Optionally, the flat layer 30 is a black light shielding layer. When the flat layer 30 is filled between the retaining wall 10 and the light emitting element LD, and between the two electrodes of the light emitting element LD, the metal in the array layer 02 can be shielded by the flat layer 30, and the electrode of the light emitting element LD can also be shielded. This is conducive to avoiding the problem of visible metal caused by the metal in the array layer 02 and the electrode of the light emitting element LD, and is conducive to improving the display effect of the display panel. When the flat layer 30 is formed, the flat layer 30 covers the electrode of the light emitting element LD, and the flat layer 30 is located on the side of the first reflective layer 21 facing the substrate 00, so as to avoid the flat layer 30 covering the first reflective layer 21 and affecting the light reflection function of the first reflective layer 21.

[0074] Please continue to refer to Fig.10 In an optional embodiment of the present disclosure, there is a spacer Q between the light emitting element LD and the blocking wall 10 adjacent to the light emitting element LD, and the second reflective layer 22 is also located in the spacer Q and on the side of the flat layer 30 away from the substrate 00; the second reflective layer 22 located in the spacer Q is connected to the second reflective layer 22 located on the side wall of the light emitting element LD, and / or the second reflective layer 22 located in the spacer Q is connected to the second reflective layer 22 located on the side wall of the blocking wall 10.

[0075] When the second reflective layer 22 is introduced into the spacer area Q between the light emitting element LD and the baffle wall 10 adjacent to the light emitting element LD, the second reflective layer 22 can be manufactured simultaneously with the second reflective layer 22 on the side wall of the baffle wall 10, and connected to the second reflective layer 22 on the side wall of the baffle wall 10, so as to avoid the formation of a gap between the side wall of the baffle wall 10 and the above-mentioned spacer area Q, which is equivalent to increasing the area of ​​the second reflective layer 22 that can reflect light, which is beneficial to realize the reflection of light of different angles and a large viewing angle emitted by the light emitting element LD, and is beneficial to improve the utilization rate of light.

[0076] When the side wall of the light-emitting element LD is provided with a second reflective layer 22, the second reflective layer 22 in the spacer area Q can be manufactured simultaneously with the second reflective layer 22 on the side wall of the light-emitting element LD and the two can be connected to avoid the existence of a gap between the second reflective layer 22 on the side wall of the light-emitting element LD and the second reflective layer 22 in the spacer area Q, so as to avoid the light directed toward the gap from being unable to be utilized, so that the area between the spacer area Q and the side wall of the light-emitting element LD is covered by the second reflective layer 22, which is also beneficial to increase the coverage area of ​​the second reflective layer 22, realize the reflection of light at different angles, and also help to improve the utilization rate of light.

[0077] When the side walls of the light-emitting element LD and the side walls of the blocking wall 10 are both provided with the second reflective layer 22, the second reflective layer 22 in the spacer area Q can be respectively connected to the second reflective layer 22 on the side wall of the light-emitting element LD and the second reflective layer 22 on the side wall of the blocking wall 10, so that the side wall of the blocking wall 10 and the spacer area Q, as well as the side wall of the light-emitting element LD and the spacer area Q are all covered by the second reflective layer 22, which is more conducive to increasing the coverage area of ​​the second reflective layer 22, so as to increase the reflection area of ​​the second reflective layer 22, and increase the amount of light reflected by the second reflective layer 22 and emitted to the light emitting surface of the display panel, so as to further improve the light utilization rate of the light-emitting element LD and improve the overall luminous brightness of the display panel.

[0078] Fig.11 FIG. 2 is a diagram showing a relative position relationship between the first reflective layer 21 and the second reflective layer 22 in the spacer region Q. Please refer to FIG. Fig.11 In an optional embodiment of the present disclosure, the first reflective layer 21 is in contact with the second reflective layer 22 located in the spacing area Q. Fig.10 and Fig.11After the blocking wall 10 is made and the light emitting element LD is bound on one side of the array layer 02, when the flat layer 30 is formed, the flat layer 30 does not completely cover the side of the first reflective layer 21, but exposes at least part of the side of the first reflective layer 21. In this way, when the second reflective layer 22 is formed on the side of the flat layer 30 away from the substrate 00, the second reflective layer 22 will be able to form contact with the first reflective layer 21 in the spacing area Q. The configuration of the second reflective layer 22 in contact with the first reflective layer 21 is conducive to improving the adhesion between the second reflective layer 22 and the first reflective layer 21, improving the fixing reliability of the two, and at the same time, it is conducive to improving the overall coverage area of ​​the second reflective layer 22 and the first reflective layer 21, so as to increase the amount of light that can be reflected by the first reflective layer 21 and the second reflective layer 22 as a whole, and further improve the overall display brightness of the display panel.

[0079] Please continue to refer to Fig.10 and Fig.11 In an optional embodiment of the present disclosure, the first reflective layer 21 includes a first part 21-a, a second part 21-b and a connecting part 21-c connecting the first part 21-a and the second part 21-b, wherein the first part 21-a and the second part 21-b are respectively parallel to the plane where the substrate 00 is located, and the connecting part 21-c is located between the first part 21-a and the second part 21-b along a direction perpendicular to the plane where the substrate 00 is located, the second part 21-b is located on the side of the connecting part 21-c away from the substrate 00, and the second part 21-b contacts the second reflective layer 22 located in the spacer area Q on the side facing the spacer area Q.

[0080] In this embodiment, the non-planar structure of the side of the light-emitting element LD facing the substrate 00 is used as an example for explanation. The first reflective layer 21 is adapted to the structure of the surface of the side of the light-emitting element LD facing the substrate 00. The first reflective layer 21 includes a first portion 21-a, a connecting portion 21-c and a second portion 21-b connected in sequence. The first portion 21-a is located on the side of the connecting portion 21-c facing the substrate 00, and the second portion 21-b is located on the side of the connecting portion 21-c facing away from the substrate 00. The flat layer 30 covers the side of the connecting portion 21-c and at least exposes the side of the second portion 21-b. When the second reflective layer 22 is formed on the side of the flat layer 30 facing away from the substrate 00, the second reflective layer 22 will contact the second portion 21-b. The arrangement in which the second reflective layer 22 is in direct contact with the second portion 21-b in the first reflective layer 21 is conducive to improving the fixing reliability between the first reflective layer 21 and the second reflective layer 22, and is conducive to avoiding undesirable phenomena such as warping of the second reflective layer 22 in the interval area Q.

[0081] Fig.12 and Fig.13 Another relative position relationship diagram of the first reflective layer 21 and the second reflective layer 22 in the spacer region Q is shown respectively. Fig.11, Fig.12 and Fig.13 Three relative positional relationships between the second portion 21-b in the first reflective layer 21 and the second reflective layer 22 in the spacing region Q are shown respectively. In an optional embodiment of the present disclosure, please refer to Fig.11 , and make appropriate reference Fig.10 , the surface of the second portion 21-b facing the substrate 00 is flush with the surface of the second reflective layer 22 in the spacing zone Q facing the substrate 00. In this way, the second portion 21-b in the first reflective layer 21 and the surface of the second reflective layer 22 facing the substrate 00 are located in the same plane, and the side surface of the second portion 21-b is completely exposed outside the flat layer 30. In this way, the entire side surface of the second portion 21-b is in contact with the second reflective layer 22 in the spacing zone Q, which is beneficial to improving the fixing reliability between the second reflective layer 22 and the first reflective layer 21.

[0082] Alternatively, please refer to Fig.12 , and make appropriate reference Figures 8 to 10 , along the direction from the spacer Q to the light emitting element LD, at least part of the sub-reflection layer in the second portion 21-b overlaps with the flat layer 30 in the spacer Q, and at least part of the sub-reflection layer in the second portion 21-b does not overlap with the flat layer 30 in the spacer Q, wherein the sub-reflection layer in the second portion 21-b that does not overlap with the flat layer 30 contacts the second reflective layer 22 in the spacer Q. In this embodiment, at least part of the side surface of the second portion 21-b is covered by the flat layer 30, and at least part of the side surface is not covered by the flat layer 30, that is, the flat layer 30 only exposes at least part of the side surface of the second portion 21-b, and when the second reflective layer 22 is formed in the spacer Q, the second reflective layer 22 will be able to contact the side surface of the second portion 21-b that is not covered by the flat layer 30, which can also improve the fixing reliability between the second reflective layer 22 and the first reflective layer 21 to a certain extent.

[0083] Alternatively, please refer to Fig.13 , and make appropriate reference Fig.10 , along the direction perpendicular to the substrate 00, the second portion 21-b is located between two surfaces of the second reflective layer 22 in the spacer region Q that are parallel to the substrate 00. That is to say, along the direction from the spacer region Q to the light emitting element LD, the projection of the second portion 21-b is located within the projection range of the second reflective layer 22 in the spacer region Q. This arrangement is conducive to increasing the contact area between the second reflective layer 22 and the first reflective layer 21, thereby facilitating improving the fixing reliability between the second reflective layer 22 and the first reflective layer 21.

[0084] The above embodiment shows a solution in which the first reflective layer 21 is in contact with the second reflective layer 22 in the spacer region Q. In an optional embodiment of the present disclosure, the first reflective layer 21 and the second reflective layer 22 in the spacer region Q may also be configured not to be in contact with each other as required. For example, please refer to Fig.14 and Fig.15 ,in, Fig.14 and Fig.15 Another relative position relationship diagram of the first reflective layer 21 and the second reflective layer 22 in the spacer region Q is shown in FIG. Fig.14 , along the direction of the blocking wall 10 pointing to the light emitting element LD, the first reflective layer 21 and the second reflective layer 22 located in the interval area Q are isolated by the flat layer 30; and / or, please refer to Fig.15 And appropriately combine Fig.10 , along a direction perpendicular to the plane where the substrate 00 is located, the first reflective layer 21 and the second reflective layer 22 located in the spacing area Q are isolated by the planarization layer 30 .

[0085] Fig.14 The illustrated embodiment shows a solution in which the first reflective layer 21 and the second reflective layer 22 in the spacer region Q are isolated by the planar layer 30 in a direction parallel to the substrate 00. Fig.15 The illustrated embodiment shows a solution in which the first reflective layer 21 and the second reflective layer 22 in the spacer region Q are isolated by the flat layer 30 in a direction perpendicular to the substrate 00. Of course, in some other embodiments of the present disclosure, the first reflective layer 21 and the second reflective layer 22 in the spacer region Q may be isolated by the flat layer 30 in both the horizontal direction (the direction parallel to the substrate 00) and the vertical direction (the direction perpendicular to the substrate 00). In the manufacturing process of the display panel, considering the thermal influence, the first reflective layer 21 and the second reflective layer 22 may expand due to heat, so the flat layer 30 is used to isolate the two, so as to reserve a certain space for the thermal deformation of the first reflective layer 21 and the second reflective layer 22.

[0086] Please refer to Fig.10In an optional embodiment of the present disclosure, there is a spacing area Q between the light emitting element LD and the baffle 10 adjacent to the light emitting element LD, and the width D01 of the spacing area Q is smaller than the width D00 of the light emitting element LD along the direction of the baffle 10 pointing to the light emitting element LD. When the light emitting element LD emits light, at least part of the light of its wide viewing angle can be further emitted to the light emitting surface of the display panel after being reflected by the second reflective layer 22 located on the side wall of the baffle 10, thereby increasing the effective utilization rate of the light of the corresponding light emitting element LD. Since light will cause light loss during transmission, the longer the distance, the greater the light loss may be. If the width of the spacing area Q between the baffle 10 and the light emitting element LD is set too large, for example, greater than the width of the light emitting element LD, the light of the wide viewing angle emitted by the light emitting element LD will cause greater light loss during the transmission to the second reflective layer 22 on the side wall of the baffle 10, which will affect the amount of light reflected from the second reflective layer 22 on the side wall of the baffle 10 to the light emitting surface of the display panel. Therefore, when the width of the spacing region Q is set smaller than the width of the light-emitting element LD in the embodiment of the present disclosure, the light loss can be reduced to a certain extent, and the amount of light reflected to the light-emitting surface of the display panel through the second reflective layer 22 can be increased, which is beneficial to improving the luminous brightness of the corresponding light-emitting element LD.

[0087] Fig.16 Shown Figure 1 A BB cross-section of the display panel, please refer to Fig.16 In an optional embodiment of the present disclosure, the display panel includes at least two light-emitting elements LD-1 and LD-2 with different luminous colors, and the widths of the interval regions Q corresponding to the light-emitting elements LD-1 and LD-2 with different luminous colors are different.

[0088] When the light-emitting colors of the light-emitting elements LD are different, the light-emitting efficiencies of the light-emitting elements LD may be different. For the light-emitting elements LD with different light-emitting efficiencies, the widths of the corresponding spacing areas Q may be set differently. For example, assuming that the display panel includes a first-color light-emitting element LD-1 and a second-color light-emitting element LD-2, and the light-emitting efficiency of the first-color light-emitting element LD-1 is lower than that of the second-color light-emitting element. In this case, the width D1 of the spacing area Q adjacent to the first-color light-emitting element LD-1 may be set to be smaller than the width of the first-color light-emitting element LD-1, and the width D2 of the spacing area Q adjacent to the second-color light-emitting element LD-2 may be set to be smaller than the width of the second-color light-emitting element LD-2. At the same time, the width D1 of the spacing area Q adjacent to the first-color light-emitting element LD-1 may be set to be smaller than the width D2 of the spacing area Q adjacent to the second-color light-emitting element LD-2. The width D2 of the interval Q is set to 1. Thus, a large portion of the light emitted by the first color light emitting element LD-1 at a large viewing angle will be able to be directed toward the second reflective layer 22 on the side wall of the retaining wall 10, and then be directed toward the light emitting surface of the display panel after being reflected by the second reflective layer 22. Thus, it is equivalent to increasing the actual luminous brightness of the first color light emitting element LD-1 by differentially designing the amount of light reflected by the second reflective layer 22, thereby reducing the difference in luminous brightness between the first color light emitting element LD-1 and the second color light emitting element LD-2 with different luminous efficiencies, and thus it is beneficial to improve the uniformity of the overall display brightness of the display panel. Optionally, the first color light emitting element LD-1 is a red light emitting element LD, and the second color light emitting element LD-2 is a green light emitting element or a blue light emitting element.

[0089] Please refer to Fig.11 In an optional embodiment of the present disclosure, the second reflective layer 22 includes a first section 22-1 located on the side wall of the light emitting element LD and a second section 22-2 located on the side wall of the retaining wall 10, the thickness of the first section 22-1 is S1, the thickness of the second section 22-2 is S2, and the thickness of the first reflective layer 21 is S3, wherein S1<S3<S2.

[0090] This embodiment shows a solution in which the side wall of the light emitting element LD and the side wall of the retaining wall 10 facing the light emitting element LD are provided with a second reflective layer 22, wherein the second reflective layer 22 located on the side wall of the light emitting element LD is a first subdivision 22-1, and the second reflective layer 22 located on the side wall of the retaining wall 10 is a second subdivision 22-2, wherein the thickness S1 of the first subdivision 22-1 is less than the thickness S2 of the second subdivision 22-2, and both the first subdivision 22-1 and the second subdivision 22-2 may include stacked Bragg reflective layers, and the number of groups of the Bragg reflective layers included in the first subdivision 22-1 is less than that of the second subdivision 22-2. -2 includes the number of groups of Bragg reflection layers. When the second reflection layer 22 is actually manufactured, after the manufacture of part of the Bragg reflection layers on the side walls of the light emitting element LD and the side walls of the retaining wall 10 is completed, the Bragg reflection layers on the side walls of the light emitting element LD constitute the first division 22-1. Subsequently, other Bragg reflection layers can be manufactured on the side walls of the retaining wall 10, thereby forming the second division 22-2 on the side walls of the retaining wall 10, and no Bragg reflection layers are manufactured on the side walls of the light emitting element LD, so that the thickness S1 of the first division 22-1 is less than the thickness S3 of the first reflection layer 21, and less than the thickness S2 of the second division 22-2. Taking into account the limitations of the structure of the light-emitting element LD itself, if a second reflective layer 22 with a larger thickness is formed on its side wall, the greater the thickness of the second reflective layer 22, the greater the risk of separation of the second reflective layer 22 from the side wall of the light-emitting element LD. Therefore, in this embodiment, when the thickness S1 of the second reflective layer 22 (i.e., the first section 22-1) located on the side wall of the light-emitting element LD is set to be smaller than the thickness S3 of the first reflective layer 21, it is beneficial to reduce the risk of separation of the first section 22-1 from the side wall of the light-emitting element LD.

[0091] In addition, considering that the present disclosure can improve the adhesion between the second reflecting layer 22 and the retaining wall 10 and reduce the risk of separation of the second reflecting layer 22 from the retaining wall 10 by adjusting the inclination of the side wall of the retaining wall 10 and the coverage area of ​​the second reflecting layer 22 on the retaining wall 10, the present disclosure sets the thickness S2 of the second section 22-2 located on the side wall of the retaining wall 10 to be greater than the thickness S3 of the first reflecting layer 21. While avoiding the separation of the second reflecting layer 22 from the retaining wall 10, the reflectivity of the second reflecting layer 22 on the side wall of the retaining wall 10 can also be improved by increasing the thickness of the second reflecting layer 22 on the side wall of the retaining wall 10.

[0092] Optionally, please continue to refer to Fig.11, the angle between the side wall of the retaining wall 10 and the bottom surface of the retaining wall 10 is 60°≤θ≤80°. If the angle between the side wall of the retaining wall 10 and the bottom surface of the retaining wall 10 is set to be smaller, for example, less than 60°, if the upper surface of the retaining wall 10 is still kept higher than the upper surface of the light-emitting element LD, the area occupied by the retaining wall 10 in the display panel will be larger, affecting the pixel density of the display panel. If the angle between the side wall of the retaining wall 10 and the bottom surface of the retaining wall 10 is set to be larger, for example, greater than 80°, the slope of the side wall of the retaining wall 10 will be steeper, affecting the adhesion between the second reflective layer 22 and the retaining wall 10, and increasing the risk of the second reflective layer 22 peeling off from the side wall of the retaining wall 10. Therefore, in the embodiment of the present disclosure, the angle between the side wall of the retaining wall 10 and the bottom surface of the retaining wall 10 is set to 60°~80°, which can not only prevent the retaining wall 10 from occupying too much space of the display panel, which is beneficial to improving the pixel density of the display panel, but also improve the fixing reliability between the second reflective layer 22 and the side wall of the retaining wall 10, and prevent the second reflective layer 22 from peeling off from the side wall of the retaining wall 10.

[0093] In this embodiment, another feasible implementation method for improving the fixing reliability between the second reflective layer 22 and the retaining wall 10 is to cover the second reflective layer 22 on the sidewall of the retaining wall 10 and the surface of the retaining wall 10 facing away from the substrate 00. Fig.10 The second reflective layer 22 located on the surface of the retaining wall 10 away from the substrate 00 is connected to the second reflective layer 22 located on the side wall of the retaining wall 10. The second reflective layer 22 located on the surface of the retaining wall 10 away from the substrate 00 can pull the second reflective layer 22 on the side wall of the retaining wall 10, thereby helping to reduce or avoid the problem of peeling off between the second reflective layer 22 and the side wall of the retaining wall 10.

[0094] Please refer to Fig.16 In an optional embodiment of the present disclosure, the display panel includes at least two light-emitting elements LD of different luminous colors, and the thickness of the first reflective layer 21 corresponding to the light-emitting elements LD of different luminous colors is the same. The first reflective layer 21 is arranged on the side of the epitaxial layer of the light-emitting element LD facing the substrate 00, and is used to reflect the light emitted to the bottom of the light-emitting element LD to improve the light utilization rate of the light-emitting element LD. When light-emitting elements LD of different luminous colors are arranged in the display panel, the thickness of the first reflective layer 21 corresponding to the light-emitting elements LD of different luminous colors can be set to be the same, which is conducive to achieving a unified setting of the first reflective layer 21 and is conducive to reducing the difficulty of manufacturing the display panel.

[0095] Of course, in some other embodiments of the present disclosure, the thickness of the first reflective layer 21 corresponding to at least some of the light-emitting elements LD of different light-emitting colors may be designed differently. Fig.17 , Fig.17 Shown Figure 1Another BB cross-sectional view of the display panel. In an optional embodiment of the present disclosure, the light-emitting element LD includes a first color light-emitting element LD-1 and a second color light-emitting element LD-2. The luminous efficiency of the first color light-emitting element LD-1 is lower than the luminous efficiency of the second color light-emitting element LD-2. The thickness of the first reflective layer 21 corresponding to the first color light-emitting element LD-1 is greater than the thickness of the first reflective layer 21 corresponding to the second color light-emitting element LD-2.

[0096] When light-emitting elements LD of different colors are arranged in the display panel, there is a difference in the luminous efficiency of at least some of the light-emitting elements LD of different colors. This embodiment is explained by taking the luminous efficiency of the first color light-emitting element LD-1 being lower than the luminous efficiency of the second color light-emitting element LD-2 as an example. Under the same conditions, the luminous brightness of the light-emitting element LD with low luminous efficiency will be lower than the luminous brightness of the light-emitting element LD with high luminous efficiency. In the embodiment of the present disclosure, the thickness of the first reflective layer 21 corresponding to the first color light-emitting element LD-1 and the second color light-emitting element LD-2 with different luminous efficiency is designed differently, so that the thickness of the first reflective layer 21 corresponding to the first color light-emitting element LD-1 with lower luminous efficiency is greater than the thickness of the first reflective layer 21 corresponding to the second color light-emitting element LD-2 with higher luminous efficiency, so as to increase the amount of light that can be reflected by the first reflective layer 21 corresponding to the first color light-emitting element LD-1 with lower luminous efficiency, thereby increasing the amount of light actually emitted by the first color light-emitting element LD-1 to the light-emitting surface of the display panel, and increasing the brightness of the first color light-emitting element LD-1, so as to balance the difference in luminous brightness between the first color light-emitting element LD-1 and the second color light-emitting element LD-2 with different luminous efficiency, thereby helping to improve the overall display brightness uniformity of the display panel.

[0097] Please refer to the appropriate Fig.17 , Figure 6 and Figure 7 , Figure 8 and Fig. 9 In an optional embodiment of the present disclosure, the first reflective layer 21 corresponding to the first color light emitting element LD-1 includes an M1 group of first Bragg reflective layers 211, and the first reflective layer 21 corresponding to the second color light emitting element LD-2 includes an M2 group of first Bragg reflective layers 222; wherein, Figure 6 and Figure 7 As shown, M1>M2; or, as Figure 8 and Fig. 9 As shown, M1=M2, the thickness of the first Bragg reflective layer corresponding to the first color light emitting element LD-1 is greater than the thickness of the first Bragg reflective layer corresponding to the second color light emitting element LD-2.

[0098] In order to make the thickness of the first reflective layer 21 corresponding to the first color light emitting element LD-1 greater than the thickness of the first reflective layer 21 corresponding to the second color light emitting element LD-2, a feasible configuration method is to increase the number of groups of Bragg reflective layers included in the first reflective layer 21 corresponding to the first color light emitting element LD-1, such as Figure 6 and Figure 7 As shown, the thickness of the Bragg reflection layer corresponding to the first color light-emitting element LD-1 and the second color light-emitting element LD-2 is set to be the same, which is equivalent to adding at least one more Bragg reflection layer on the first reflective light-emitting element LD compared to the second color light-emitting element LD-2. This setting method is conducive to simplifying the overall design difficulty of the first reflection layer 21 corresponding to different color light-emitting elements LD.

[0099] In order to make the thickness of the first reflective layer 21 corresponding to the first color light emitting element LD-1 greater than the thickness of the first reflective layer 21 corresponding to the second color light emitting element LD-2, another feasible configuration is as follows: Figure 8 and Fig. 9 As shown, the number of groups of Bragg reflection layers contained in the first reflection layer 21 corresponding to the first color light-emitting element LD-1 and the second color light-emitting element LD-2 is the same, the difference is that the thickness of the Bragg reflection layer corresponding to the first color light-emitting element LD-1 is greater than the thickness of the Bragg reflection layer corresponding to the second color light-emitting element LD-2. This method can also increase the thickness of the first reflection layer 21 corresponding to the first color light-emitting element LD-1, thereby improving the light output brightness of the first color light-emitting element LD-1.

[0100] In an optional embodiment of the present disclosure, the first color light emitting element LD-1 is a red light emitting element, and the second color light emitting element LD-2 is a green light emitting element or a blue light emitting element. By increasing the thickness of the first reflective layer 21 corresponding to the red light emitting element LD, the light emitting brightness of the red light emitting element can be increased, the difference in light emitting brightness between the red light emitting element and the green light emitting element or the blue light emitting element can be reduced, and the overall display brightness uniformity of the display panel can be improved.

[0101] Optionally, the thickness of the first reflective layer 21 corresponding to the red light emitting element is 1.5 μm, and the thickness of the first reflective layer 21 corresponding to the green light emitting element and the blue light emitting element is 1 μm.

[0102] Fig.18 Shown Figure 1 Another AA cross-sectional view of the display panel shown, please refer to Fig.18 In an optional embodiment of the present disclosure, the display panel also includes a third reflective layer 23, and the third reflective layer 23 is at least arranged on the side of the second reflective layer 22 of the side wall of the baffle wall 10 away from the side wall of the baffle wall 10, and the reflectivity of the third reflective layer 23 is greater than the reflectivity of the second reflective layer 22.

[0103] Specifically, this embodiment shows a solution of introducing a third reflective layer 23 with a higher reflectivity into the display panel. The third reflective layer 23 is at least located on the surface of the second reflective layer 22 on the side wall of the baffle wall 10 that is away from the baffle wall 10. By introducing the third reflective layer 23 with a higher reflectivity, it is beneficial to improve the reflection efficiency of the third reflective layer 23 for light, thereby increasing the amount of light reflected via the third reflective layer 23 to the light emitting surface of the display panel, so that more light emitted by the light-emitting element LD that might not have been able to emit from the display panel can be effectively utilized, thereby being more beneficial to improving the light output of the light-emitting element LD and improving the overall display brightness of the display panel.

[0104] The third reflective layer 23 is a reflective layer made of a metal material. In an optional embodiment of the present disclosure, the third reflective layer 23 includes one of Au, Ag, and Al. When the third reflective layer 23 is formed of materials such as Au, Ag, or Al, the reflection efficiency of the third reflective layer 23 to light can be effectively improved, and the effective utilization rate of the light emitted by the light-emitting element LD can be improved. When the third reflective layer 23 is a metal reflective layer, due to the limitation of the material itself, it is difficult for the metal reflective layer to be directly attached to the side wall or surface of the structure such as the retaining wall 10. Considering that the metal reflective layer can be better attached to the surface of the Bragg reflective layer, in the embodiment of the present disclosure, after the second reflective layer 22 is formed in the display panel, the third reflective layer 23 is formed on at least part of the surface of the second reflective layer 22, which is beneficial to improving the fixing reliability of the third reflective layer 23 in the display panel and improving the overall reflection efficiency of the reflective layer in the display panel.

[0105] Considering that if a metal reflective layer with a large area is formed on the display panel, there may be a risk of causing a short circuit, which may affect the normal display function of the display panel. Therefore, in an optional embodiment of the present disclosure, the surface area of ​​the third reflective layer 23 is smaller than the surface area of ​​the second reflective layer 22. In other words, the third reflective layer 23 is not formed on the entire surface of the second reflective layer 22, and the third reflective layer 23 may be formed in a selected area of ​​the display panel. For example, when the second reflective layer 22 is located on the upper surface of the barrier wall 10 (the surface facing away from the substrate 00), the side wall of the barrier wall 10, the side wall of the light emitting element LD, and the spacer Q between the barrier wall 10 and the side wall of the light emitting element LD, the third reflective layer 23 can be formed on the surface of the second reflective layer 22 on the side wall of the barrier wall 10 and the surface of the second reflective layer 22 in the spacer Q, so as to achieve effective reflection of the light of the light emitting element LD with a wide viewing angle. It can be selected whether to form the third reflective layer 23 on the surface of the second reflective layer 22 on the side wall of the light emitting element LD according to actual needs, and it can be selected whether to form the third reflective layer 23 on the upper surface of the barrier wall 10 according to actual needs. In this way, the area where the third reflective layer 23 is provided can reflect the light by the third reflective layer 23, and the area where the third reflective layer 23 is not provided can reflect the light by the second reflective layer 22, so as to fully improve the overall reflection efficiency of the reflective layer in the display panel. Moreover, the third reflective layer 23 is not provided on the entire surface of a large area, so it is helpful to reduce the risk of short circuit caused by the large-area provision of the third reflective layer 23 of metal.

[0106] Fig.19 The figure shows a partial arrangement diagram of the light emitting element LD in the display panel. Fig.19 In an optional embodiment of the present disclosure, the light emitting element LD includes a conventional light emitting element LD00 and a redundant light emitting element LD0 arranged corresponding to the conventional light emitting element LD00. Fig.19The conventional light-emitting element LD00 and the redundant light-emitting element LD0 are distinguished by different fillings, but the specific structure is not limited. In the manufacturing process of the display panel, in addition to binding the conventional light-emitting element LD00 on the surface of the array layer away from the substrate 00, a binding area of ​​the redundant light-emitting element LD0 can also be set on the array layer for binding the redundant light-emitting element LD0. When the display panel is detected, if it is found that some conventional light-emitting elements LD00 do not emit light, the corresponding redundant light-emitting element LD0 can replace the conventional light-emitting element LD00 to emit light, thereby realizing the repair function of the display panel. The light-emitting element LD mentioned in the embodiment of the present disclosure may include a conventional light-emitting element LD00 and a redundant light-emitting element LD0, that is, the relative position relationship and size relationship of the retaining wall 10, the first reflection layer 21, the second reflection layer 22 and other structures corresponding to the conventional light-emitting element LD00 and the redundant light-emitting element LD0 can refer to the setting method of the above embodiment, even if the redundant light-emitting element LD0 replaces the conventional light-emitting element LD00 to emit light, the second reflection layer 22 or the third reflection layer 23 can also be used to realize the reflection function of light, thereby improving the effective utilization rate of the light emitted by the corresponding light-emitting element LD.

[0107] Fig. 20 FIG. 1 is a flowchart of manufacturing a display panel provided by an embodiment of the present disclosure. Fig.21 The figure shows a schematic diagram of forming a driving layer in the process of manufacturing a display panel. Fig. 22 The figure shows a schematic diagram of binding the light emitting element LD in the process of manufacturing the display panel. Fig.23 It is a schematic diagram showing a process of forming a retaining wall 10 in the process of manufacturing a display panel. Fig.24 FIG. 3 is a schematic diagram showing a process of forming a flat layer 30 in the process of manufacturing a display panel. Figure 20 to Figure 24 The present disclosure provides a method for manufacturing a display panel, comprising:

[0108] Step S01, please refer to Fig.21 , provide a substrate 00, and manufacture a driving layer on one side of the substrate 00, and the side of the driving layer facing away from the substrate 00 includes a connecting pad P; it should be noted that the specific process of manufacturing the driving layer on one side of the substrate 00 can refer to the relevant technology, and the present disclosure does not make specific limitations on this. The specific structure of the driving layer can also refer to the structure of the prior art, and the present disclosure does not make specific limitations on this.

[0109] Step S02, please refer to Fig. 22, the light emitting element LD is bound to the side of the driving layer facing away from the substrate 00, so that the light emitting element LD is electrically connected to the connection pad P, and the first reflective layer 21 is provided on the side of the epitaxial layer of the light emitting element LD facing the driving layer. Optionally, the first reflective layer 21 can be used as a part of the light emitting element LD, or can be formed on one side of the light emitting element LD before the light emitting element LD is bound, and the present disclosure does not specifically limit this.

[0110] Step S03, please refer to Fig.23 , make a baffle wall 10, the baffle wall 10 is located between adjacent light emitting elements LD, and the baffle wall 10 is introduced between adjacent light emitting elements LD. The upper surface of the baffle wall 10 can be higher than the upper surface of the light emitting element LD, thereby realizing the function of blocking light and avoiding the problem of light crosstalk between light emitting elements LD of different colors.

[0111] Step S04, please refer to Fig.24 A flat layer 30 is formed at least between the retaining wall 10 and the light emitting element LD. The flat layer 30 may be, for example, a black light shielding layer. The flat layer 30 forms a flat surface, shielding the metal structure in the array layer 02 and the electrode of the light emitting element LD to avoid metal reflection problems.

[0112] Step S05, please refer to Figures 2 to 4 , a second reflective layer 22 is manufactured so that the second reflective layer 22 is located on the side wall of the blocking wall 10 facing the light emitting element LD, and / or the second reflective layer 22 is located on the side wall of the light emitting element LD.

[0113] In the display panel provided in the embodiment of the present disclosure, the first reflective layer 21 can be used as a part of the light emitting element LD or can be made on one side of the light emitting element LD before the light emitting element LD is bound. The second reflective layer 22 is formed after the preparation of the retaining wall 10 and the preparation of the flat layer 30 are completed. Figure 2 , Figure 3 or Figure 4 When the light emitting element LD emits light, part of the light rays directed toward the bottom of the light emitting element LD can be emitted from the light emitting surface of the display panel after being reflected by the first reflecting layer 21, and part of the light rays with a large viewing angle can be emitted from the light emitting surface of the display panel after being reflected by the second reflecting layer 22. In this way, the light rays that could not originally be emitted from the light emitting surface of the display panel are effectively utilized through the first reflecting layer 21 and the second reflecting layer 22, so that this part of the light rays can be emitted from the light emitting surface of the display panel, which effectively improves the light utilization rate of the light emitting element LD, thereby facilitating improving the overall display brightness of the display panel.

[0114] Fig.25 FIG. 2 is a schematic diagram showing a process of forming a second reflective layer 22 in the process of manufacturing a display panel. Fig.25In an optional embodiment of the present disclosure, in the above step S05, the second reflective layer 22 is produced, specifically: the second reflective layer 22 is covered on the side of the retaining wall 10, the flat layer 30 and the light-emitting element LD away from the substrate 00, and at least the second reflective layer 22 located on the surface of the light-emitting element LD away from the substrate 00 is removed.

[0115] Please continue to refer to Fig.25 When forming the second reflective layer 22 on the display panel, the second reflective layer 22 with a whole-surface structure can be formed on the side of the retaining wall 10, the flat layer 30 and the light-emitting element LD away from the substrate 00, so that the upper surface of the retaining wall 10, the side wall of the retaining wall 10, the upper surface of the flat layer 30, the side wall and the upper surface of the light-emitting element LD are all covered by the second reflective layer 22, and then the second reflective layer 22 on the upper surface of the light-emitting element LD is removed by etching or other methods, and the second reflective layer 22 in other areas is retained, so that the coverage area of ​​the second reflective layer 22 can be increased, and the reflection amount of the second reflective layer 22 to light can be increased. It should be noted that when the second reflective layer 22 includes a stacked Bragg reflective layer, the corresponding sub-reflective layer can be formed layer by layer by multiple deposition or evaporation methods, and the present disclosure does not specifically limit this. The thickness of the second reflective layer 22 on the side wall of the light emitting element LD may be the same as or different from the thickness of the second reflective layer 22 on the side wall of the blocking wall 10. When the thickness of the second reflective layer 22 on the side wall of the light emitting element LD is different from the thickness of the second reflective layer 22 in other areas, for example, when the thickness of the second reflective layer 22 on the side wall of the light emitting element LD is less than the thickness of the second reflective layer 22 on the side wall of the blocking wall 10, after uniformly evaporating a portion of the second reflective layer 22, the second reflective layer 22 may be continuously evaporated in other areas except the side wall of the light emitting element LD, so that the thickness of the second reflective layer 22 on the side wall of the blocking wall 10 is greater than the thickness of the second reflective layer 22 on the side wall of the light emitting element LD, thereby avoiding the problem of the second reflective layer 22 on the side wall of the light emitting element LD being too thick and causing the second reflective layer 22 to peel off from the side wall of the light emitting element LD.

[0116] It should be noted that after the second reflective layer 22 is formed, a packaging layer 40 may be formed on the side of the second reflective layer 22 facing away from the substrate 00. For example, please refer to Fig.26 , Fig.26 The figure shows a schematic diagram of forming an encapsulation layer in the process of manufacturing a display panel. The encapsulation layer 40 covers the side of the second reflective layer 22 away from the substrate 00 and covers the light-emitting element LD, forming a flat surface on the side of the light-emitting element LD away from the substrate 00 to prevent external moisture, oxygen, etc. from interfering with the light-emitting element LD, which is beneficial to improving the light-emitting reliability of the display panel.

[0117] Fig. 27FIG. 2 is a schematic diagram showing a process of manufacturing a display panel to form a second reflective layer 22 and a third reflective layer 23. Please refer to FIG. Fig. 27 In an optional embodiment of the present disclosure, before removing the second reflective layer 22 on the surface of the light emitting element LD facing away from the substrate 00, it also includes: making a third reflective layer 23 on the side of the second reflective layer 22 facing away from the substrate 00, at least removing the third reflective layer 23 on the surface of the light emitting element LD facing away from the substrate 00, and the reflectivity of the third reflective layer 23 is greater than the reflectivity of the second reflective layer 22.

[0118] When it is necessary to introduce the third reflective layer 23 into the display panel, after the second reflective layer 22 of the whole-surface structure is formed on the side of the retaining wall 10, the flat layer 30, and the light-emitting element LD away from the substrate 00, the second reflective layer 22 on the surface of the light-emitting element LD is not removed first, but the third reflective layer 23 is first formed on the side of the second reflective layer 22 of the whole-surface structure away from the substrate 00, for example, by evaporating a whole-surface metal reflective layer, and then the third reflective layer 23 and the second reflective layer 22 of a part of the area are removed by etching and other processes. The third reflective layer 23 is a metal reflective layer, which has a higher reflectivity than, for example, a Bragg reflective layer. Introducing the third reflective layer 23 into the display panel is conducive to further improving the light utilization rate of the display panel. Moreover, the method of forming the third reflective layer 23 on the surface of the second reflective layer 22 avoids the problem of being unable to be effectively fixed when the third reflective layer 23 is directly formed on the retaining wall 10 and other structures.

[0119] Please refer to Fig.28 , Fig.28 Another schematic diagram of forming the second reflective layer 22 and the third reflective layer 23 in the process of manufacturing the display panel is shown. In an optional embodiment of the present disclosure, after the third reflective layer 23 is formed on the side of the second reflective layer 22 away from the substrate 00, the third reflective layer 23 on the surface of the retaining wall 10 away from the substrate 00 is removed. When the third metal layer is a metal reflective layer with a high reflectivity, if a large area of ​​the metal reflective layer is formed on the display panel, there will be a high probability of short circuit risk. For this reason, in addition to removing the third reflective layer 23 on the surface of the light emitting element LD away from the substrate 00, the third reflective layer 23 on the surface of the retaining wall 10 away from the substrate 00 can also be removed, thereby avoiding the appearance of a large area of ​​the third reflective layer 23 and avoiding the occurrence of short circuit problems. At least retaining the third reflective layer 23 on the side wall of the retaining wall 10 can increase the reflectivity of the light of a large viewing angle emitted by the light emitting element LD, thereby improving the effective utilization rate of the light emitted by the light emitting element LD. For other scattered light, it can be reflected by the second reflective layer 22 in other areas, which is also conducive to improving the overall display brightness of the display panel.

[0120] Based on the same inventive concept, the present disclosure also provides a display device, Fig.29FIG. 2 is a schematic diagram of a structure of a display device 200 provided in an embodiment of the present disclosure. Fig.29 , the display device 200 includes the display panel in any of the above embodiments. The display device 200 provided in the embodiment of the present disclosure may be any electronic device with a display function, such as a touch screen, a mobile phone, a tablet computer, a laptop computer, an e-book, or a television. The display device 200 provided in the embodiment of the present disclosure has the beneficial effects of the display panel provided in the embodiment of the present disclosure. For details, please refer to the specific description of the display panel in the above embodiments, which will not be repeated in this embodiment.

[0121] Understandably, Fig.29 Only a rectangular structure is used as an example to illustrate one shape of the display device 200. In some other embodiments of the present disclosure, the display device 200 may also be circular, elliptical or any other feasible shape, and the present disclosure does not specifically limit this.

[0122] It should be noted that, in this article, relational terms such as "first" and "second" are only used to distinguish one entity or operation from another entity or operation, and do not necessarily require or imply any such actual relationship or order between these entities or operations. Moreover, the terms "include", "comprise" or any other variants thereof are intended to cover non-exclusive inclusion, so that a process, method, article or device including a series of elements includes not only those elements, but also other elements not explicitly listed, or also includes elements inherent to such process, method, article or device. In the absence of further restrictions, the elements defined by the sentence "comprise a ..." do not exclude the existence of other identical elements in the process, method, article or device including the elements.

[0123] The above description is only a specific embodiment of the present disclosure, so that those skilled in the art can understand or implement the present disclosure. Various modifications to these embodiments will be apparent to those skilled in the art, and the general principles defined herein may be implemented in other embodiments without departing from the spirit or scope of the present disclosure. Therefore, the present disclosure will not be limited to the embodiments described herein, but will conform to the widest scope consistent with the principles and novel features disclosed herein.

Claims

1. A display panel, characterized in that: It comprises a substrate, a driving layer arranged on one side of the substrate, and a light-emitting element and a retaining wall arranged on a side of the driving layer away from the substrate, wherein the retaining wall is at least located between adjacent light-emitting elements in a direction parallel to the plane where the substrate is located; The display panel further comprises a first reflective layer and a second reflective layer, wherein the first reflective layer is located on a side of the epitaxial layer of the light emitting element facing the driving layer; The second reflective layer is located on a side wall of the blocking wall facing the light emitting element, and / or the second reflective layer is located on a side wall of the light emitting element. 2 . The display panel according to claim 1 , wherein the second reflective layer is located on a side wall of the blocking wall facing the light emitting element.

3. The display panel according to claim 2, characterized in that: The thickness of the first reflective layer is smaller than the thickness of the second reflective layer.

4. The display panel according to claim 3, characterized in that: The first reflection layer includes M groups of first Bragg reflection layers, and the second reflection layer includes N groups of second Bragg reflection layers, wherein 1≤M<N, and M and N are both integers.

5. The display panel according to claim 3, characterized in that: The first reflective layer includes M groups of first Bragg reflective layers, and the second reflective layer includes N groups of second Bragg reflective layers, wherein 1≤M=N, M and N are both integers; and the thickness of the first Bragg reflective layer is less than that of the second Bragg reflective layer.

6. The display panel according to claim 3, characterized in that: The thickness of the first reflective layer is 1 μm≤H1≤1.5 μm, and the thickness of the second reflective layer is 2 μm≤H2≤3 μm.

7. The display panel according to claim 2, characterized in that: The first reflection layer includes M groups of first Bragg reflection layers, and the second reflection layer includes N groups of second Bragg reflection layers, where M≥1, N≥1, and M and N are both integers; At least one of the first Bragg reflection layers includes a first sub-reflection layer and a second sub-reflection layer, the first sub-reflection layer and the second sub-reflection layer have different refractive indices, and / or the first sub-reflection layer and the second sub-reflection layer have different thicknesses; At least one of the second Bragg reflection layers includes a third sub-reflection layer and a fourth sub-reflection layer, the third sub-reflection layer and the fourth sub-reflection layer have different refractive indices, and / or the third sub-reflection layer and the fourth sub-reflection layer have different thicknesses.

8. The display panel according to claim 1, characterized in that: The distance between the surface of the retaining wall facing away from the substrate and the substrate is h1; the distance between the surface of the light emitting element facing away from the substrate and the substrate is h2, wherein h1≥h2.

9. The display panel according to claim 2, characterized in that: The second reflective layer is also located on the surface of the barrier wall facing away from the substrate.

10. The display panel according to claim 1, characterized in that: It also includes a flat layer, which is located at least between the retaining wall and the light-emitting element along a direction parallel to the substrate; and is located on a side of the first reflective layer facing the substrate along a direction perpendicular to the substrate.

11. The display panel according to claim 10, characterized in that: A spacing area is provided between the light-emitting element and the retaining wall adjacent to the light-emitting element, and the second reflective layer is also located in the spacing area and on a side of the flat layer away from the substrate; the second reflective layer located in the spacing area is connected to the second reflective layer located on the side wall of the light-emitting element, and / or the second reflective layer located in the spacing area is connected to the second reflective layer located on the side wall of the retaining wall.

12. The display panel according to claim 11, characterized in that: The first reflective layer contacts the second reflective layer located in the spacer area.

13. The display panel according to claim 12, characterized in that: The first reflective layer includes a first portion, a second portion, and a connecting portion connecting the first portion and the second portion, wherein the first portion and the second portion are respectively parallel to the plane where the substrate is located, and along a direction perpendicular to the plane where the substrate is located, the connecting portion is located between the first portion and the second portion, the second portion is located on a side of the connecting portion away from the substrate, and the second portion contacts the second reflective layer located in the spacer region on a side facing the spacer region.

14. The display panel according to claim 13, characterized in that: The surface of the second portion facing the substrate is flush with the surface of the second reflective layer of the spacing region facing the substrate; Alternatively, along the direction from the spacer to the light-emitting element, at least part of the sub-reflection layer in the second portion overlaps with the flat layer in the spacer, and at least part of the sub-reflection layer in the second portion does not overlap with the flat layer in the spacer, wherein the sub-reflection layer in the second portion that does not overlap with the flat layer contacts the second reflective layer in the spacer; Alternatively, along a direction perpendicular to the substrate, the second portion is located between two surfaces of the second reflective layer in the spacer region that are parallel to the substrate.

15. The display panel according to claim 11, characterized in that: Along the direction of the blocking wall pointing to the light-emitting element, the first reflective layer and the second reflective layer located in the spacing area are isolated by the flat layer; and / or, along the direction perpendicular to the plane where the substrate is located, the first reflective layer and the second reflective layer located in the spacing area are isolated by the flat layer.

16. The display panel according to claim 10, characterized in that: A spacing area is provided between the light emitting element and the blocking wall adjacent to the light emitting element, and a width of the spacing area along a direction of the blocking wall pointing toward the light emitting element is smaller than a width of the light emitting element.

17. The display panel according to claim 16, characterized in that: The display panel includes at least two light emitting elements with different light emitting colors, and the widths of the spacing areas corresponding to the light emitting elements with different light emitting colors are different.

18. The display panel according to claim 1, characterized in that: The second reflective layer includes a first section located on the side wall of the light emitting element and a second section located on the side wall of the retaining wall. The thickness of the first section is S1, the thickness of the second section is S2, and the thickness of the first reflective layer is S3, wherein S1<S3<S2.

19. The display panel according to claim 1, characterized in that: The display panel includes at least two light-emitting elements with different light-emitting colors, and the first reflective layers corresponding to the light-emitting elements with different light-emitting colors have the same thickness.

20. The display panel according to claim 1, characterized in that: The light-emitting element includes a first color light-emitting element and a second color light-emitting element. The light-emitting efficiency of the first color light-emitting element is lower than the light-emitting efficiency of the second color light-emitting element. The thickness of the first reflective layer corresponding to the first color light-emitting element is greater than the thickness of the first reflective layer corresponding to the second color light-emitting element.

21. The display panel according to claim 20, characterized in that: The first reflective layer corresponding to the first color light emitting element includes a first Bragg reflective layer of group M1, and the first reflective layer corresponding to the second color light emitting element includes a first Bragg reflective layer of group M2; wherein, M1>M2; or, M1=M2, and the thickness of the first Bragg reflective layer corresponding to the first color light emitting element is greater than the thickness of the first Bragg reflective layer corresponding to the second color light emitting element.

22. The display panel according to claim 20, characterized in that: The first color light emitting element is a red light emitting element, and the second color light emitting element is a green light emitting element or a blue light emitting element.

23. The display panel according to claim 2, characterized in that: The angle between the side wall of the retaining wall and the bottom surface of the retaining wall is 60°≤θ≤80°.

24. The display panel according to claim 2, characterized in that: The display panel further includes a third reflective layer, which is at least disposed on a side of the side wall of the retaining wall where the second reflective layer is away from the retaining wall side wall, and has a reflectivity greater than that of the second reflective layer.

25. The display panel according to claim 24, characterized in that: The third reflective layer includes one of Au, Ag, and Al.

26. The display panel according to claim 24, characterized in that: The surface area of ​​the third reflective layer is smaller than the surface area of ​​the second reflective layer.

27. The display panel according to claim 1, characterized in that: The light emitting elements include regular light emitting elements and redundant light emitting elements arranged corresponding to the regular light emitting elements.

28. A method for manufacturing a display panel, characterized in that: include: Providing a substrate, and manufacturing a driving layer on one side of the substrate, wherein a side of the driving layer facing away from the substrate includes a connecting pad; A light emitting element is bound to a side of the driving layer facing away from the substrate, so that the light emitting element is electrically connected to the connection pad, and a first reflective layer is provided on a side of the epitaxial layer of the light emitting element facing the driving layer; Making a retaining wall, wherein the retaining wall is located between adjacent light-emitting elements; forming a flat layer at least between the retaining wall and the light emitting element; A second reflective layer is manufactured so that the second reflective layer is located on a side wall of the retaining wall facing the light emitting element, and / or the second reflective layer is located on a side wall of the light emitting element.

29. The method according to claim 28, characterized in that: The manufacturing of the second reflective layer specifically includes: covering the retaining wall, the flat layer and the side of the light emitting element away from the substrate with the second reflective layer, and at least removing the second reflective layer located on the surface of the light emitting element away from the substrate.

30. The manufacturing method according to claim 29, characterized in that: Before removing the second reflective layer on the surface of the light emitting element away from the substrate, the method further includes: making a third reflective layer on the side of the second reflective layer away from the substrate, at least removing the third reflective layer on the surface of the light emitting element away from the substrate, and the reflectivity of the third reflective layer is greater than the reflectivity of the second reflective layer.

31. The method according to claim 30, characterized in that: After forming the third reflective layer on the side of the second reflective layer facing away from the substrate, the method further includes removing the third reflective layer on the side of the retaining wall facing away from the substrate surface.

32. A display device, characterized in that: A display panel comprising any one of claims 1 to 27.

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