Display panel and display device

Abstract

The application discloses a display panel and a display device, and relates to the technical field of display, which comprises a substrate, an array layer arranged on one side of the substrate, a plurality of accommodating cavities in the array layer, a first protruding part in a first area of the accommodating cavities, a first recess in a second area, a first electrode arranged on the first protruding part, a second electrode arranged on the first recess, and at least one of the first electrode and the second electrode comprising a light-reflecting material; a plurality of light-emitting elements arranged on a side of the array layer away from the substrate, one light-emitting element arranged in one accommodating cavity; a second recess and a second protruding part on a side of the light-emitting element facing the array layer, a first pole of the light-emitting element located in the second recess, a second pole of the light-emitting element located on a side of the second protruding part facing the array layer; the first protruding part is located in the second recess, the second protruding part is located in the first recess, the first pole is electrically connected with the first electrode, and the second pole is electrically connected with the second electrode. The application is convenient to install and improves the light-emitting efficiency.

Description

Technical Field

[0001] This invention relates to the field of display technology, and more specifically, to a display panel and a display device. Background Technology

[0002] Microlight-emitting diodes (MicroLEDs) typically refer to devices that achieve full-color displays by miniaturizing the chip size to less than 200 micrometers based on the traditional LED chip structure and arranging red, green, and blue MicroLEDs on an array substrate according to certain rules. These displays feature independently controlled pixels, independent light emission control, high grayscale, low power consumption, ultra-high resolution, and ultra-high color saturation. Furthermore, due to their self-emissive nature, MicroLED microdisplays can also achieve flexible and transparent displays, while consuming only about 10% of the power of LCD panels.

[0003] MicroLEDs emit light from multiple surfaces, but improving the effective utilization rate of the light emitted by MicroLEDs in MicroLED display products has become one of the urgent technical problems to be solved at present. Summary of the Invention

[0004] In view of this, the present invention provides a display panel and a display device, wherein a light-emitting element is disposed in an accommodating cavity on an array substrate, and the first electrode and / or the second electrode on the array substrate have a reflective function, which can reflect the light emitted by the light-emitting element that was originally not used to the light-emitting surface, thereby improving the effective utilization rate of light.

[0005] In a first aspect, the present invention provides a display panel, comprising:

[0006] Substrate;

[0007] An array layer disposed on one side of a substrate includes a plurality of accommodating cavities. Each accommodating cavity includes a first region and a second region at least partially surrounding the first region. The first region includes a first protrusion, and the second region includes a first recess. A first electrode is disposed on the surface of the first protrusion facing away from the substrate, and a second electrode is disposed on the surface of the first recess facing away from the substrate. The second electrode is insulated from the first electrode. At least one of the first electrode and the second electrode includes a reflective material.

[0008] Multiple light-emitting elements are disposed on the side of the array layer away from the substrate, and one light-emitting element is disposed in one of the accommodating cavities; the side of the light-emitting element facing the array layer includes a second recess and a second protrusion at least partially surrounding the second recess, the first electrode of the light-emitting element is located in the second recess, and the second electrode of the light-emitting element is located on the side of the second protrusion facing the array layer;

[0009] The first protrusion is located in the second recess, the second protrusion is located in the first recess, the first pole is electrically connected to the first electrode, and the second pole is electrically connected to the second electrode.

[0010] In a second aspect, the present invention provides a display device including the display panel provided in the first aspect of the present invention.

[0011] Compared with the prior art, the display panel and display device provided by the present invention achieve at least the following beneficial effects:

[0012] The display panel and display device provided by this invention incorporate multiple cavities on the array layer for accommodating light-emitting elements. A first electrode is disposed on a first protrusion within each cavity, and a second electrode is disposed on the surface of a first recess. Correspondingly, a second recess and a second protrusion are disposed on the side of the light-emitting element facing the array layer. The first electrode of the light-emitting element is located in the second recess, and the second electrode is located in the second protrusion. When the light-emitting element is placed into the cavity, the first protrusion on the cavity enters the second recess of the light-emitting element, and the second protrusion of the light-emitting element enters the first recess on the cavity, thus forming an electrical connection between the first electrode of the light-emitting element and the first electrode in the cavity, and an electrical connection between the second electrode of the light-emitting element and the second electrode in the cavity. This method of placing the light-emitting element in the cavity on the array layer and forming an electrical connection with the first and second electrodes in the cavity provides high alignment accuracy. This eliminates the need to identify the cathode and anode of the light-emitting element during the transfer of the light-emitting element to the array layer, thereby improving transfer efficiency and reducing the difficulty of electrically connecting the light-emitting element to the array layer. In particular, the first electrode and / or the second electrode disposed in the accommodating cavity in this invention include a reflective material, which enables the first electrode and / or the second electrode to have a reflective function. At least part of the light emitted by the light-emitting element towards the array layer can be reflected by the first electrode or the second electrode and directed to the light-emitting surface of the display panel, thereby improving the effective utilization rate of the light emitted by the light-emitting element and thus improving the light emission efficiency of the display panel and the display device.

[0013] Of course, any product implementing this invention need not necessarily achieve all of the technical effects described above at the same time.

[0014] Other features and advantages of the invention will become clear from the following detailed description of exemplary embodiments of the invention with reference to the accompanying drawings. Attached Figure Description

[0015] The accompanying drawings, which are incorporated in and form part of this specification, illustrate embodiments of the invention and, together with their description, serve to explain the principles of the invention.

[0016] Figure 1 The image shown is a plan view of a display panel provided in an embodiment of the present invention;

[0017] Figure 2 As shown Figure 1 A cross-sectional view of the display panel along the BB direction;

[0018] Figure 3 The diagram shown is a schematic of what happens before the light-emitting element is electrically connected to the array layer.

[0019] Figure 4 The diagram shows a schematic of the first and second electrodes in the accommodating cavity;

[0020] Figure 5 The diagram shown is a schematic of the first and second electrodes in a light-emitting element;

[0021] Figure 6 The diagram shows another schematic of the first and second electrodes in the accommodating cavity;

[0022] Figure 7 The diagram shown is another schematic of the first and second electrodes in a light-emitting element;

[0023] Figure 8 The diagram shown is another schematic before the light-emitting element is electrically connected to the array layer;

[0024] Figure 9 As shown Figure 1 Another BB-direction cross-sectional view of the display panel;

[0025] Figure 10 The diagram shown is another schematic before the light-emitting element is electrically connected to the array layer;

[0026] Figure 11 The diagram shown is a schematic representation of a display device provided in an embodiment of the present invention.

[0027] Figure 12 The diagram shows a structural schematic of a connecting hole on the first protrusion.

[0028] Figure 13 The diagram shown is a schematic representation of a display device provided in an embodiment of the present invention. Detailed Implementation

[0029] Various exemplary embodiments of the present invention will now be described in detail with reference to the accompanying drawings. It should be noted that, unless otherwise specifically stated, the relative arrangement, numerical expressions, and values ​​of the components and steps set forth in these embodiments do not limit the scope of the invention.

[0030] The following description of at least one exemplary embodiment is merely illustrative and is in no way intended to limit the invention or its application or use.

[0031] Techniques, methods, and equipment known to those skilled in the art may not be discussed in detail, but where appropriate, such techniques, methods, and equipment should be considered part of the specification.

[0032] In all the examples shown and discussed herein, any specific values ​​should be interpreted as merely exemplary and not as limitations. Therefore, other examples of exemplary embodiments may have different values.

[0033] Various modifications and variations can be made to this invention without departing from its spirit or scope, as will be apparent to those skilled in the art. Therefore, this invention is intended to cover modifications and variations falling within the scope of the corresponding claims (the claimed technical solutions) and their equivalents. It should be noted that the embodiments provided in this invention can be combined with each other without contradiction.

[0034] It should be noted that similar labels and letters in the following figures indicate similar items; therefore, once an item is defined in one figure, it does not need to be discussed further in subsequent figures.

[0035] Figure 1 The image shown is a plan view of a display panel provided in an embodiment of the present invention. Figure 2 As shown Figure 1 A cross-sectional view of the display panel along the BB direction. Figure 3 The diagram shown is a schematic representation of the light-emitting element 20 before it is electrically connected to the array layer 10. Please refer to the diagram. Figures 1 to 3 This invention provides a display panel 100, comprising:

[0036] Substrate 00;

[0037] An array layer 10 is disposed on one side of a substrate 00. The array layer 10 includes a plurality of accommodating cavities Q. Each accommodating cavity Q includes a first region and a second region at least partially surrounding the first region. The first region includes a first protrusion 11, and the second region includes a first recess 12. A first electrode E01 is disposed on the surface of the first protrusion 11 facing away from the substrate 00, and a second electrode E02 is disposed on the surface of the first recess 12 facing away from the substrate 00. The second electrode E02 and the first electrode E01 are insulated. At least one of the first electrode E01 and the second electrode E02 includes a reflective material.

[0038] Multiple light-emitting elements 20 are disposed on the side of the array layer 10 away from the substrate 00, and one light-emitting element 20 is disposed in a cavity Q; the side of the light-emitting element 20 facing the array layer 10 includes a second recess 21 and a second protrusion 22 at least partially surrounding the second recess 21, the first electrode E11 of the light-emitting element 20 is located in the second recess 21, and the second electrode E12 of the light-emitting element 20 is located on the side of the second protrusion 22 facing the array layer 10;

[0039] The first protrusion 11 is located in the second recess 21, the second protrusion 22 is located in the first recess 12, the first electrode E11 is electrically connected to the first electrode E01, and the second electrode E12 is electrically connected to the second electrode E02.

[0040] It should be noted that, Figure 1 The illustration uses only a rectangular display module as an example and does not limit the shape of the display module. In some other embodiments of the present invention, the shape of the display panel may also be other, such as a rounded rectangle, a circle or other feasible shapes. Figure 1 The illustration shows the light-emitting elements 20 included in the display module, but does not limit the number, arrangement, shape and size of the actual light-emitting elements 20 included in the display module. Figure 2 The diagram only illustrates one relative positional relationship between the substrate 00, the array layer 10, and the light-emitting element 20 in the display panel, and does not limit the actual film structure of the array layer 10 and the light-emitting element 20.

[0041] Continue to refer to Figures 1 to 3 In the display panel provided by the present invention, a plurality of accommodating cavities Q for accommodating light-emitting elements 20 are introduced on the array layer 10. Each accommodating cavity Q includes a first protrusion 11 and a first recess 12 surrounding the first protrusion 11. A first electrode E01 is disposed on the first protrusion 11, and a second electrode E02 is disposed on the surface of the first recess 12. The first electrode E01 and the second electrode E02 are insulated from each other. Correspondingly, a second recess 21 and a second protrusion 22 are disposed on the side of the light-emitting element 20 facing the array layer 10. The first electrode E11 of the light-emitting element 20 is located in the second recess 21, and the second electrode E12 is located in the second protrusion 22.

[0042] When the light-emitting element 20 is placed into the accommodating cavity Q, the first protrusion 11 on the accommodating cavity Q enters the second recess 21 of the light-emitting element 20, and the second protrusion 22 of the light-emitting element 20 enters the first recess 12 on the accommodating cavity Q, so that the first electrode E11 of the light-emitting element 20 is electrically connected to the first electrode E01 in the accommodating cavity Q, and the second electrode E12 of the light-emitting element 20 is electrically connected to the second electrode E02 in the accommodating cavity Q. In this way, the electrical signal on the first electrode E01 can be transmitted to the first electrode E11 of the light-emitting element 20, and the electrical signal on the second electrode E02 can be transmitted to the second electrode E12 of the light-emitting element 20. In this embodiment of the invention, the light-emitting element 20 is disposed in the accommodating cavity Q on the array layer 10, and the first electrode E11 of the light-emitting element is electrically connected to the first electrode E01 on the array layer, and the second electrode E12 of the light-emitting element is electrically connected to the second electrode E02 on the array layer 10. The shape of the accommodating cavity Q matches the shape of the light-emitting element 20, so that the alignment accuracy is high during the transfer of the light-emitting element 20 to the array layer 10, and there is no need to identify the cathode and anode of the light-emitting element 20, which helps to improve the transfer efficiency and reduce the difficulty of electrically connecting the light-emitting element 20 to the array layer 10.

[0043] In related technologies, only a portion of the light emitted by the light-emitting element 20 can reach the light-emitting surface of the display panel, while the remaining light, such as light reaching the non-light-emitting surface of the display panel, is wasted. Therefore, in this invention, the first electrode E01 and / or the second electrode E02 disposed in the accommodating cavity Q include a reflective material, enabling the first electrode E01 and / or the second electrode E02 to have a reflective function. At least a portion of the light originally emitted by the light-emitting element 20 towards the array layer 10 can be reflected by the first electrode E01 or the second electrode E02 and directed towards the light-emitting surface of the display panel, thereby improving the effective utilization rate of the light emitted by the light-emitting element 20 and thus improving the light extraction efficiency of the display panel.

[0044] Optionally, the light-emitting element 20 mentioned in the embodiments of the present invention is a MicroLED or a Mini LED. When the first electrode E01 and / or the second electrode E02 have reflective properties, the first electrode E01 and / or the second electrode E02 may be made of metallic Mo or Mo-Al-Mo, and the present invention does not specifically limit this.

[0045] Optionally, the geometric center of the first protrusion 11 coincides with the geometric center of the receiving cavity.

[0046] Figure 4 The diagram shows a schematic of the first electrode E01 and the second electrode E02 in the accommodating cavity. Figure 5 The diagram shown illustrates one possible scenario for the first electrode E11 and the second electrode E12 in the light-emitting element 20. Please refer to... Figures 2 to 5In one alternative embodiment of the present invention, the second electrode E02 covers the surface of the first recess 12 away from the substrate 00, and the second electrode E12 covers the surface of the second protrusion 22 facing the array layer 10.

[0047] Specifically, when the second electrode E02 is disposed in the first recess 12 of the accommodating cavity, a feasible embodiment of the present invention is to cover the entire surface of the first recess 12 facing the light-emitting element 20 with the second electrode E12 of the light-emitting element 20. Simultaneously, the second electrode E12 of the light-emitting element 20 covers the surface of the second protrusion 22 of the light-emitting element 20 facing the array layer 10. When the light-emitting element 20 is placed in the accommodating cavity on the array layer 10, it is beneficial to increase the contact area between the second electrode E12 of the light-emitting element 20 and the second electrode E02 in the accommodating cavity, thereby improving the reliability of the electrical connection between the light-emitting element 20 and the array layer 10. Furthermore, when an electrical signal is provided to the second electrode E12 of the light-emitting element 20 through the second electrode E02, heat is generated between the second electrode E02 and the second electrode E12. In this embodiment of the present invention, distributing the second electrode E02 across the entire surface of the first recess 12 in the accommodating cavity also helps to dissipate heat from the display panel, preventing localized overheating in the display panel.

[0048] It should be noted that, Figure 4 In this embodiment, the top view contours of the first electrode E01 and the second electrode E02 correspond to the top view contours of the first recess 12 and the first protrusion 11 in the accommodating cavity. Figure 5 In the embodiment, the top view outline shape of the first electrode E11 and the second electrode E12 corresponds to the top view outline shape of the second recess 21 and the second protrusion 22 of the light-emitting element 20. Figure 4 and Figure 5 The embodiment is illustrated by taking the first protrusion 11 as a cylindrical structure, but the specific structure of the first protrusion 11 is not limited. In some other embodiments of the present invention, the first protrusion 11 may also be embodied in other shapes, such as a prism structure.

[0049] Continue to refer to Figure 2 and Figure 3 In one optional embodiment of the present invention, both the first recess 12 and the second protrusion 22 include arcuate surfaces, and the arcuate surfaces of the first recess 12 and the second protrusion 22 are nested together.

[0050] Specifically, Figure 2 and Figure 3The illustrated embodiment uses an ellipsoidal overall outline of the light-emitting element 20 as an example. The shape of the accommodating cavity matches the shape of the side of the light-emitting element 20 facing the array layer 10, specifically including a matching arc-shaped surface. When the light-emitting element 20 is placed in the accommodating cavity, the arc-shaped surfaces of the first recess 12 and the second protrusion 22 are nested together. Optionally, the first electrode E01 is electrically connected to the first electrode E11 by bonding, and the second electrode E02 is electrically connected to the second electrode E12 by bonding. When the first recess 12 and the second protrusion 22 are set as arc-shaped structures, and the second electrode E02 disposed on the surface of the first recess 12 has a reflective function, the arc-shaped second electrode E02 can reflect more light emitted by the light-emitting element 20 towards the array layer 10, thereby reflecting more light to the light-emitting surface of the display panel, which is more conducive to improving the light utilization rate of the light-emitting element 20 and the light emission efficiency of the display panel.

[0051] Please refer to Figure 4 and Figure 5 In one optional embodiment of the present invention, the first protrusion 11 is a columnar protrusion and the second recess 21 is a columnar recess, and the first protrusion 11 and the second recess 21 are nested together.

[0052] Specifically, Figure 4 and Figure 5 The illustrated embodiment shows a scheme in which the first protrusion 11 is configured as a columnar structure. Optionally, the first protrusion 11 is cylindrical, and correspondingly, the second recess 21 is a recess structure that matches the cylindrical structure. When the light-emitting element 20 is placed in the receiving cavity, the first protrusion 11 is inserted into the second recess 21 and nested with the second recess 21. Using a matching columnar protrusion and columnar recess is more conducive to reducing the alignment difficulty of the light-emitting element 20 and the array layer 10, and improving the assembly efficiency of the light-emitting element 20 and the array layer 10. In addition, the nesting of the first protrusion 11 and the second recess 21 also helps to improve the fixation reliability of the light-emitting element 20 in the receiving cavity.

[0053] Figure 4 and Figure 5 The illustrated embodiment shows a scheme in which the first protrusion 11 is configured as a cylindrical structure. Besides this structure, in other embodiments of the present invention, the first protrusion 11 may also be configured as other structures besides a cylindrical structure. For example, please refer to... Figure 6 and Figure 7 , Figure 6 The diagram shows another schematic of the first electrode E01 and the second electrode E02 in the accommodating cavity. Figure 7 The diagram shows another schematic of the first electrode E11 and the second electrode E12 in the light-emitting element 20. In this embodiment, the first protrusion 11 is a long strip structure as an example for explanation.

[0054] Please refer to Figure 6 and Figure 7 In one optional embodiment of the present invention, the shape of the orthographic projection of the first protrusion 11 onto the substrate 00 is elongated. Correspondingly, the shape of the orthographic projection of the first electrode E01 onto the substrate is also elongated. Optionally, the first electrode E01 covers the surface of the first protrusion 11, the long side of the elongated shape extends along the first direction F1, the length of the long side of the elongated shape is D1, and the length of the diameter of the accommodating cavity along the first direction is D2, wherein D1 < D2.

[0055] Specifically, in this embodiment, the size of the first protrusion 11 is increased. Specifically, the first protrusion 11 is configured as an elongated structure, that is, the shape of the first protrusion 11 projected onto the substrate 00 is elongated. Optionally, the long side of the elongated shape extends along a first direction. The shape of the second recess 21 of the light-emitting element 20 is an elongated shape matching the first protrusion 11. When the light-emitting element 20 is placed in the receiving cavity, the first protrusion 11 in the receiving cavity will enter the second recess 21. The first electrode E01 can be provided on the entire surface of the elongated first protrusion 11 facing the light-emitting element 20, and a full-surface first electrode E11 can be provided at the bottom of the second recess 21 of the light-emitting element 20. This increases the contact area between the first electrode E11 of the light-emitting element 20 and the first electrode E01 on the first protrusion 11, thereby improving the reliability of the electrical connection between the light-emitting element 20 and the array layer 10.

[0056] When the shapes of the orthographic projections of the first protrusion 11 and the second recess 21 onto the substrate 00 are both elongated, the shorter the longer side, the larger the area of ​​the orthographic projection, and the larger the contact area between the first protrusion 11 and the second recess 21. This is more conducive to improving the electrical connection reliability between the light-emitting element 20 and the array layer 10. Optionally, setting the length of the longer side of the first protrusion 11 to be slightly smaller than the diameter of the accommodating cavity along the first direction is even more conducive to increasing the contact area between the light-emitting element 20 and the array layer 10.

[0057] Furthermore, when the shape of the first protrusion 11 and the second recess 21 projected onto the substrate 00 is set to an elongated structure, the first protrusion 11 can serve as a positioning reference for the light-emitting element 20 when transferring the light-emitting element 20 to the array layer 10. This helps to reduce the assembly difficulty of the light-emitting element 20 and the array layer 10 and improve the production efficiency of the display panel.

[0058] In one alternative embodiment of the present invention, at least one of the first electrode E11 and the second electrode E12 is a transparent conductive material.

[0059] In this embodiment of the invention, the first electrode E11 and the second electrode E12 of the light-emitting element 20 are located on the side of the light-emitting element 20 body facing the array layer 10. When electrical signals are provided to the first electrode E11 and the second electrode E12 of the light-emitting element 20, the light-emitting element 20 will be able to emit light. When at least one of the first electrode E11 and the second electrode E12 in the light-emitting element 20 is made of a transparent conductive material, at least a portion of the light emitted by the light-emitting element 20 will be able to pass through the transparent first electrode E11 or the second electrode E12 toward the side of the array layer 10. Since at least one of the first electrode E01 and the second electrode E02 in the accommodating cavity includes a reflective material, optionally, when the first electrode E11 of the light-emitting element 20 is a transparent conductive material, the first electrode E01 of the accommodating cavity includes a reflective material, and when the second electrode E12 of the light-emitting element 20 is a transparent conductive material, the second electrode E02 of the accommodating cavity includes a reflective material. Optionally, the first electrode E11 and the second electrode E12 of the light-emitting element 20 are both transparent conductive materials, and the first electrode E01 and the second electrode E02 in the accommodating cavity both include reflective materials. When at least part of the light emitted by the light-emitting element 20 passes through the first electrode E11 or the second electrode E12 and shines into the accommodating cavity, the first electrode E01 and the second electrode E02 in the accommodating cavity can reflect at least part of this light, reflecting the light back into the light-emitting element 20 and shining onto the light-emitting surface of the display panel. This effectively improves the light emission efficiency of the display panel, thus helping to increase the brightness of the display panel.

[0060] Figure 8 The diagram shown is another schematic diagram before the light-emitting element 20 is electrically connected to the array layer 10. Figure 3 Compared to the illustrated embodiment, this embodiment adjusts the structure of the first electrode E01, the second electrode E02, the first pole E11, and the second pole E12.

[0061] Please refer to Figure 8 In an optional embodiment of the present invention, at least one of the first electrode E01 and the second electrode E02 has a surface facing the light-emitting element 20 including a first sawtooth microstructure J1, and at least one of the first electrode E11 and the second electrode E12 has a surface facing the array layer 10 including a second sawtooth microstructure J2. The first sawtooth microstructure J1 on the first electrode E01 and the second sawtooth microstructure J2 on the first electrode E11 are interlocked, and the first sawtooth microstructure J1 on the second electrode E02 and the second sawtooth microstructure J2 on the second electrode E12 are interlocked.

[0062] Specifically, Figure 8The illustrated embodiment shows a scheme in which the surfaces of the first electrode E01 and the second electrode E02 facing the light-emitting element 20 are both provided with a first serrated microstructure J1, and the surfaces of the first electrode E11 and the second electrode E12 of the light-emitting element 20 facing the array layer 10 are both provided with a second serrated microstructure J2. When the light-emitting element 20 is placed in the receiving cavity, the first serrated microstructure J1 and the second serrated microstructure J2 are interlocked. The method of introducing serrated microstructures into the first electrode E01, the second electrode E02, the first electrode E11, and the second electrode E12 and interlocking them increases the contact area between the first electrode E01 and the first electrode E11, and between the second electrode E02 and the second electrode E12, compared to a smooth structure. This is beneficial to improving the electrical connection reliability between the first electrode E01 and the first electrode E11, and also beneficial to improving the electrical connection reliability between the second electrode E02 and the second electrode E12.

[0063] In some other embodiments of the present invention, serrated microstructures may be provided only on the surface of the first electrode E01 facing the first electrode E11 and the surface of the first electrode E11 facing the first electrode E01, thereby improving the reliability of the electrical connection between the first electrode E01 and the first electrode E11. Alternatively, serrated microstructures may be provided only on the surface of the second electrode E02 facing the second electrode E12 and the surface of the second electrode E12 facing the second electrode E02, thereby improving the reliability of the electrical connection between the second electrode E02 and the second electrode E12.

[0064] Please refer to Figure 2 , Figure 3 and Figure 8 In one alternative embodiment of the present invention, the first electrode E01 and the second electrode E02 located in the accommodating cavity of the array layer 10 are formed in the same process.

[0065] Specifically, after forming a receiving cavity on the array layer 10, and forming a first protrusion 11 and a first recess 12 in the receiving cavity, a first electrode E01 and a second electrode E02 can be formed simultaneously on the surface of the first protrusion 11 facing away from the substrate 00 and the surface of the first recess 12 facing away from the substrate 00. Optionally, the geometric center of the first protrusion 11 coincides with or nearly coincides with the geometric center of the receiving cavity, and the end of the first protrusion 11 facing the substrate 00 is located at the lowest point of the first recess 12. That is, the first protrusion 11 is raised relative to the lowest point of the first recess 12. When the first electrode E01 and the second electrode E02 are formed in the same process, since there is a step difference between the surface of the first protrusion 11 facing away from the substrate 00 and the lowest point of the first recess 12, the body of the first protrusion 11 will be able to block the first electrode E01 and the second electrode E02, avoiding a short circuit between the first electrode E01 and the second electrode E02. Optionally, the first electrode E01 and the second electrode E02 are made of the same material.

[0066] When the first electrode E01 and the second electrode E02 are made of the same material in the same process, there is no need to introduce different processes or different materials for the first electrode E01 and the second electrode E02 respectively. The first electrode E01 and the second electrode E02 can be made simultaneously in the same process, which helps to simplify the production process of the display panel and improve the production efficiency of the display panel.

[0067] Figure 9 As shown Figure 1 Another BB-direction cross-sectional view of the display panel. Figure 10 As shown Figure 9 An enlarged schematic diagram of the conductor 90 in the first protrusion 11. Figure 11 The diagram shown is another schematic diagram before the light-emitting element 20 is electrically connected to the array layer 10. Figure 12 The diagram shows a structural schematic of the connecting hole on the first protrusion. This embodiment illustrates another feasible structure for the first electrode E01 in the accommodating cavity.

[0068] Please refer to Figures 9 to 12 In one optional embodiment of the present invention, the first protrusion 11 includes a connecting hole K0, which extends through the first protrusion 11 along its thickness direction (i.e., perpendicular to the substrate 00). A conductor 90 is disposed in the connecting hole, and a first electrode E01 is electrically connected to the conductor 90. The conductor 90 includes a first surface S0, a first side surface S1 connected to the first surface S0, and a second side surface S2 connected to the first side surface S1. Along the direction perpendicular to the substrate 00, the first side surface S1 is located between the first surface S0 and the second side surface S2. The first surface S0 is electrically connected to the first electrode E01. The angle between the first side surface S1 and the first surface S0 is an acute angle. The second side surface S2 faces the light-emitting element 20 and is used to reflect at least a portion of the light emitted by the light-emitting element 20 back to the light-emitting element 20.

[0069] Optionally, the connecting hole K0 on the first protrusion 11 has an irregular shape, and the conductor 90 in the connecting hole K0 has an irregular shape that matches the shape of the connecting hole K0. Optionally, the first electrode E01 and the conductor 90 are made of the same material, both including reflective material. Optionally, in the actual manufacturing process, the irregularly shaped connecting hole K0 can be formed on the first protrusion 11 first, and the conductor 90 can be formed in the connecting hole K0 of the first protrusion 11 at the same time as the first electrode E01 is manufactured. Figure 9As shown in the cross-sectional structure, the aforementioned conductor 90 comprises two parts, assumed to be a first part closer to the substrate 00 and a second part farther from the substrate 00. The first and second parts are interconnected. The first part is cylindrical, and the second part is an inverted trapezoid, with the shorter base of the inverted trapezoid connected to the first part. The first surface S0 refers to the surface parallel to the substrate 00 where the longer base of the inverted trapezoid is located. The first side surface S1 refers to the surface where the side waist of the inverted trapezoid connects to the first surface S0. The second side surface S2 refers to the surface in the cylindrical structure of the first part that connects to the first side surface S1 and forms an acute angle. A triangular groove is formed between the inverted trapezoid and the cylindrical structure; that is, the groove formed by the first side surface S1 and the second side surface S2 is a triangular groove. No first electrode E11 or second electrode E12 is located in the triangular groove region. The conductor 90 includes a reflective material. The second side S2 of the conductor 90 faces the light-emitting element 20. At least part of the light emitted by the light-emitting element 20 is reflected by the second side S2 and then reflected back to the light-emitting surface of the display panel. This also helps to improve the effective utilization rate of the light of the light-emitting element 20, thereby improving the light efficiency of the display panel.

[0070] In one alternative embodiment of the present invention, at least one of the first electrode E11 and the second electrode E12 of the light-emitting element 20 comprises a non-transparent metallic material.

[0071] Specifically, when the array layer 10 and the light-emitting element 20 adopt Figure 9 and Figure 11 In the structure shown, the first electrode E11 or the second electrode E12 in the light-emitting element 20 is made of a non-transparent metal material, or both the first electrode E11 and the second electrode E12 of the light-emitting element 20 are made of non-transparent metal materials. When one of the first electrode E11 and the second electrode E12 is made of a non-transparent metal material, the light emitted by the light-emitting element 20 towards the non-transparent first electrode E11 or the second electrode E12 will be blocked by the first electrode E11 or the second electrode E12 and cannot be emitted further. Since the light-emitting element 20 does not have a first electrode E11 or a second electrode E12 in the aforementioned triangular groove area, the light emitted by the light-emitting element 20 can be emitted through the aforementioned triangular groove area and directed towards the aforementioned second side surface S2. This portion of the light is reflected by the second side surface S2 and then directed back towards the light-emitting surface of the display panel, thereby improving the light utilization rate of the light-emitting element 20 and enhancing the display brightness of the display panel.

[0072] Please refer to Figure 2 In one optional embodiment of the present invention, the array layer 10 includes a transistor T and an insulating layer 18 disposed on the side of the transistor T away from the substrate 00, and the accommodating cavity Q is disposed on the insulating layer 18.

[0073] Optionally, the topmost insulating layer 18 in the array layer 10 is, for example, a planarization layer, which provides a flat surface. Optionally, the accommodating cavity is formed by processing the planarization layer; that is, the accommodating cavity is disposed on the topmost insulating layer 18 in the array layer 10. Optionally, when the accommodating cavity is formed on the insulating layer 18, the accommodating cavity does not penetrate the insulating layer 18. This avoids the accommodating cavity formation process from affecting other metal layers on the array layer 10. To achieve electrical connection between the first electrode E01 and the second electrode E02 and the metal layers on the array layer 10, conductive vias can be formed in the accommodating cavity. When the first electrode E01 or the second electrode E02 is formed in the accommodating cavity, the first electrode E01 and the second electrode E02 can be electrically connected to the metal layers on the array layer 10 through the conductive vias, thereby realizing signal transmission.

[0074] Continue to refer to Figure 2 and Figure 3 In an optional embodiment of the present invention, the array layer 10 includes a transistor T and a fixed voltage signal line 30. The second electrode E12 of the light-emitting element 20 is electrically connected to the transistor T through the second electrode E02 and the first connection hole K1. The first electrode E11 of the light-emitting element 20 is electrically connected to the fixed voltage signal line 30 through the first electrode E01 and the second connection hole K2.

[0075] Specifically, the array layer 10 mentioned in this embodiment of the invention is provided with a plurality of transistors T. The second electrode E12 of the light-emitting element 20 is electrically connected to the drain of the transistor T through a first connection hole K1 penetrating the accommodating cavity. The first electrode E11 of the light-emitting element 20 is electrically connected to a fixed voltage signal line 30 in the array layer 10 through a second connection hole K2 penetrating the accommodating cavity. The fixed voltage signal line 30 is used to provide a fixed voltage signal to the first electrode E11 of the light-emitting element 20. When the transistor T connected to the second electrode E12 of the light-emitting element 20 is turned on, a driving signal can be transmitted to the second electrode E12 of the light-emitting element 20 through the drain of the transistor T. Driven by the signals from the first electrode E11 and the second electrode E12, the light-emitting element 20 will be able to emit light.

[0076] Optionally, the second electrode E12 of the light-emitting element 20 is the anode, and the first electrode E11 is the cathode.

[0077] It should be noted that this embodiment illustrates a scheme in which the fixed voltage signal line 30 is disposed on the same layer as the source and drain of the transistor T. This eliminates the need for separate film layers for the fixed voltage signal line 30, thus simplifying the film layer structure of the display panel. In some other embodiments of the present invention, the fixed voltage signal line 30 may also be disposed on other metal layers on the array layer 10, for example, on the same layer as the gate, or on other metal layers. The present invention does not specifically limit this.

[0078] Figure 13 The diagram shown is a schematic representation of a display device provided in an embodiment of the present invention. Please refer to it. Figure 13 Based on the same inventive concept, the present invention also provides a display device 200, including the display panel 100 provided in the above embodiments of the present invention.

[0079] It is understood that the display device 200 provided in the embodiments of the present invention can be other display devices with display functions, such as mobile phones, tablets, computers, televisions, and vehicle-mounted display devices, and the present invention does not impose specific limitations on them. The display device provided in the embodiments of the present invention has the beneficial effects of the display module provided in the embodiments of the present invention. For details, please refer to the specific descriptions of the display panel in the above embodiments, which will not be repeated here.

[0080] As can be seen from the above embodiments, the display panel and display device provided by the present invention achieve at least the following beneficial effects:

[0081] The display panel and display device provided by this invention incorporate multiple cavities on the array layer for accommodating light-emitting elements. A first electrode is disposed on a first protrusion within each cavity, and a second electrode is disposed on the surface of a first recess. Correspondingly, a second recess and a second protrusion are disposed on the side of the light-emitting element facing the array layer. The first electrode of the light-emitting element is located in the second recess, and the second electrode is located in the second protrusion. When the light-emitting element is placed into the cavity, the first protrusion on the cavity enters the second recess of the light-emitting element, and the second protrusion of the light-emitting element enters the first recess on the cavity, thus forming an electrical connection between the first electrode of the light-emitting element and the first electrode in the cavity, and an electrical connection between the second electrode of the light-emitting element and the second electrode in the cavity. This method of placing the light-emitting element in the cavity on the array layer and forming an electrical connection with the first and second electrodes in the cavity provides high alignment accuracy. This eliminates the need to identify the cathode and anode of the light-emitting element during the transfer of the light-emitting element to the array layer, thereby improving transfer efficiency and reducing the difficulty of electrically connecting the light-emitting element to the array layer. In particular, the first electrode and / or the second electrode disposed in the accommodating cavity in this invention include a reflective material, which enables the first electrode and / or the second electrode to have a reflective function. At least part of the light emitted by the light-emitting element towards the array layer can be reflected by the first electrode or the second electrode and directed to the light-emitting surface of the display panel, thereby improving the effective utilization rate of the light emitted by the light-emitting element and thus improving the light emission efficiency of the display panel and the display device.

[0082] While specific embodiments of the invention have been described in detail by way of examples, those skilled in the art should understand that the examples are for illustrative purposes only and not intended to limit the scope of the invention. Those skilled in the art should understand that modifications can be made to the above embodiments without departing from the scope and spirit of the invention. The scope of the invention is defined by the appended claims.

Claims

1. A display panel, characterized in that, include: Substrate; An array layer disposed on one side of a substrate includes a plurality of accommodating cavities. Each accommodating cavity includes a first region and a second region at least partially surrounding the first region. The first region includes a first protrusion, and the second region includes a first recess. A first electrode is disposed on the surface of the first protrusion facing away from the substrate, and a second electrode is disposed on the surface of the first recess facing away from the substrate. The second electrode is insulated from the first electrode. At least one of the first electrode and the second electrode includes a reflective material. Multiple light-emitting elements are disposed on the side of the array layer away from the substrate, and one light-emitting element is disposed in one of the accommodating cavities; the side of the light-emitting element facing the array layer includes a second recess and a second protrusion at least partially surrounding the second recess, the first electrode of the light-emitting element is located in the second recess, and the second electrode of the light-emitting element is located on the side of the second protrusion facing the array layer; The first protrusion is located in the second recess, the second protrusion is located in the first recess, the first pole is electrically connected to the first electrode, and the second pole is electrically connected to the second electrode. The first protrusion includes a connecting hole that extends through the first protrusion along its thickness direction. A conductor is disposed in the connecting hole, and the first electrode is electrically connected to the conductor. The conductor includes a first surface, a first side surface connected to the first surface, and a second side surface connected to the first side surface. The first side surface is located between the first surface and the second side surface in a direction perpendicular to the substrate. The first surface is electrically connected to the first electrode. The angle between the first side surface and the first surface is an acute angle, and the second side surface faces the light-emitting element, used to reflect at least a portion of the light emitted by the light-emitting element back to the light-emitting element.

2. The display panel according to claim 1, characterized in that, The second electrode covers the surface of the first recess that is away from the substrate, and the second electrode covers the surface of the second protrusion that faces the array layer.

3. The display panel according to claim 1, characterized in that, Both the first recess and the second protrusion include arc-shaped surfaces, and the arc-shaped surfaces of the first recess and the second protrusion are nested together.

4. The display panel according to claim 1, characterized in that, The first protrusion has a long strip shape as its orthogonal projection onto the substrate. The long side of the long strip extends along a first direction, and the length of the long side of the long strip is D1. The diameter of the accommodating cavity along the first direction is D2, where D1 < D2.

5. The display panel according to claim 1, characterized in that, At least one of the first electrode and the second electrode is a transparent conductive material.

6. The display panel according to claim 1, characterized in that, The surface of at least one of the first electrode and the second electrode facing the light-emitting element includes a first serrated microstructure, and the surface of at least one of the first electrode and the second electrode facing the array layer includes a second serrated microstructure. The first serrated microstructure on the first electrode and the second serrated microstructure on the first electrode are interlocked, and the first serrated microstructure on the second electrode and the second serrated microstructure on the second electrode are interlocked.

7. The display panel according to claim 1, characterized in that, The first electrode and the second electrode are formed in the same process.

8. The display panel according to claim 1, characterized in that, At least one of the first electrode and the second electrode of the light-emitting element comprises a non-transparent metallic material.

9. The display panel according to claim 1, characterized in that, The array layer includes transistors and an insulating layer disposed on the side of the transistors away from the substrate, and the accommodating cavity is disposed in the insulating layer.

10. The display panel according to claim 1, characterized in that, The array layer includes transistors and fixed voltage signal lines. The second electrode of the light-emitting element is electrically connected to the transistor through a first connection hole, and the first electrode of the light-emitting element is electrically connected to the fixed voltage signal line through a second connection hole.

11. A display device, characterized in that, Includes the display panel described in any one of claims 1 to 10.

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