Display device

Abstract

According to an embodiment of the disclosure, a display device includes a substrate on which a plurality of sub-pixels are defined, a plurality of first assembly electrodes and a plurality of second assembly electrodes disposed in each of the plurality of sub-pixels, the plurality of second assembly electrodes disposed to be spaced apart from the plurality of first assembly electrodes, a first insulating layer disposed on the plurality of first assembly electrodes and the plurality of second assembly electrodes and including a plurality of accommodation grooves overlapping the plurality of sub-pixels, and a plurality of light emitting elements disposed in the plurality of accommodation grooves of the first insulating layer, each of the plurality of accommodation grooves overlapping apices of the plurality of first assembly electrodes and apices of the plurality of second assembly electrodes. Accordingly, the light emitting elements are assembled in a region having a high dielectrophoresis (DEP) force, thereby improving assembly yield of the light emitting elements.

Description

[0001] Cross-reference to related applications

[0002] This application claims priority to Korean Patent Application No. 10-2025-0056906, filed with the Korean Intellectual Property Office on April 30, 2025, the disclosure of which is incorporated herein by reference. Technical Field

[0003] This disclosure relates to a display device, and more specifically, to a display device using light-emitting diodes (LEDs). Background Technology

[0004] Display devices used for displays in computers, TVs, or mobile phones include self-emissive organic light-emitting displays (OLEDs) and liquid crystal displays (LCDs) that require a separate light source.

[0005] Display devices have been used in a variety of applications, including computer monitors and TVs, as well as personal portable devices, and research is underway on display devices with large display areas, reduced size, and lighter weight.

[0006] In addition, LED display devices have recently garnered attention as the next generation of display devices. Because LEDs are made of inorganic materials rather than organic materials, they offer superior reliability and a longer lifespan than liquid crystal displays or organic light-emitting diode displays. Furthermore, LEDs have a fast turn-on speed, excellent luminous efficiency, and strong shock resistance, resulting in excellent stability and the ability to display high-brightness images. Summary of the Invention

[0007] One objective of this disclosure is to provide a display device in which light-emitting elements are assembled in a region having a high dielectric electrophoretic (DEP) force.

[0008] Another objective of this disclosure is to provide a display device with improved assembly yield of light-emitting elements.

[0009] Another objective of this disclosure is to provide a display device that improves the assembly resolution of the light-emitting elements.

[0010] The purpose of this disclosure is not limited to the purposes described above, and other purposes not mentioned above may be clearly understood by those skilled in the art from the following description.

[0011] According to an embodiment of the present disclosure, a display device includes: a substrate having a plurality of sub-pixels defined thereon; a plurality of first mounting electrodes and a plurality of second mounting electrodes disposed in each of the plurality of sub-pixels, the plurality of second mounting electrodes being spaced apart from the plurality of first mounting electrodes; a first insulating layer disposed on the plurality of first mounting electrodes and the plurality of second mounting electrodes and including a plurality of receiving pockets overlapping the plurality of sub-pixels; and a plurality of light-emitting elements disposed in the plurality of receiving pockets of the first insulating layer, each of the plurality of receiving pockets overlapping the vertices of the plurality of first mounting electrodes and the plurality of second mounting electrodes.

[0012] A display device according to another exemplary embodiment of the present disclosure includes: a substrate having a plurality of sub-pixels defined thereon; a plurality of first mounting electrodes and a plurality of second mounting electrodes disposed in each of the plurality of sub-pixels, the plurality of second mounting electrodes being spaced apart from the plurality of first mounting electrodes; a first insulating layer disposed on the plurality of first mounting electrodes and the plurality of second mounting electrodes, and including a plurality of receiving grooves overlapping the plurality of sub-pixels; and a plurality of light-emitting elements disposed in the plurality of receiving grooves of the first insulating layer, wherein the planar shape of each of the plurality of receiving grooves surrounds one vertex of the plurality of first mounting electrodes and one vertex of the plurality of second mounting electrodes.

[0013] Further details of the exemplary embodiments are included in the detailed description and the accompanying drawings.

[0014] According to this disclosure, the assembly yield of light-emitting elements can be improved and the process optimized by assembling the light-emitting elements in regions with high dielectric strength.

[0015] According to this disclosure, the problem of assembling several light-emitting elements in a single receiving slot can be prevented.

[0016] According to this disclosure, the assembly resolution can be improved by increasing the number of light-emitting elements that can be assembled using a pair of assembly electrodes.

[0017] The effects of this disclosure are not limited to those illustrated above, and many more effects are included in this specification. Attached Figure Description

[0018] The above and other aspects, features and advantages of this disclosure will be more clearly understood from the following detailed description taken in conjunction with the accompanying drawings, in which: Figure 1 This is a schematic diagram of a display device according to an embodiment of the present disclosure; Figure 2 This is an enlarged plan view of a display device according to an exemplary embodiment of the present disclosure; Figure 3 It is along Figure 2A cross-sectional view taken by line A-A' in the middle; Figure 4 This is an enlarged plan view of a display device according to another exemplary embodiment of the present disclosure; Figure 5 This is an enlarged plan view of a display device according to yet another exemplary embodiment of the present disclosure; Figure 6 This is an enlarged plan view of a display device according to yet another exemplary embodiment of the present disclosure. Detailed Implementation

[0019] The advantages and features of this disclosure, as well as the methods for achieving these advantages and features, will become clear from the exemplary embodiments described in detail below with reference to the accompanying drawings. However, this disclosure is not limited to the exemplary embodiments disclosed herein, but will be implemented in different forms. The exemplary embodiments are provided by way of example only so that those skilled in the art can fully understand the disclosure and scope of this disclosure.

[0020] The shapes, dimensions, ratios, angles, quantities, etc., shown in the accompanying drawings used to describe exemplary embodiments of this disclosure are merely examples, and this disclosure is not limited thereto. Furthermore, in the following description of this disclosure, detailed explanations of known related technologies may be omitted to avoid unnecessarily obscuring the subject matter of this disclosure. Terms such as “comprising,” “having,” and “including” as used herein are generally intended to allow for the addition of other components, unless the term is used in conjunction with the term “only.” Any reference to the singular may include the plural unless explicitly stated otherwise.

[0021] Even without explicit explanation, components are interpreted as including the normal tolerance range.

[0022] When using terms such as “above,” “over,” “below,” and “adjacent” to describe the positional relationship between two parts, one or more parts may be located between the two parts, unless the term is used with the terms “immediately adjacent” or “directly.”

[0023] When one element or layer is placed "on" another element or layer, another layer or element can be directly inserted on or between the other element.

[0024] Although the terms "first," "second," etc., are used to describe various components, these components are not limited by these terms. These terms are only used to distinguish one component from other components. Therefore, the first component referred to below may be the second component in the technical concept of this disclosure.

[0025] The same reference numerals generally denote the same elements throughout the specification.

[0026] The dimensions and thicknesses of each component shown in the accompanying drawings are for ease of description and this disclosure is not limited to the dimensions and thicknesses of the components shown.

[0027] The features of the various embodiments of this disclosure may be combined or integrated with each other in part or in whole, and may be associated and operated in a variety of technical ways, and the embodiments may be implemented independently of each other or in relation to each other.

[0028] This disclosure will be described in detail below with reference to the accompanying drawings.

[0029] Figure 1 This is a schematic diagram of a display device according to an embodiment of the present disclosure. Figure 1 For ease of description, only the substrate 110 is shown among the various components of the display device 100.

[0030] Reference Figure 1 The substrate 110 is a component for supporting various parts included in the display device 100, and may be formed of an insulating material. For example, the substrate 110 may be made of glass, resin, etc. Furthermore, the substrate 110 may be made of polymer, plastic, etc., and in some embodiments, the substrate 110 may be made of a flexible plastic material. Multiple sub-pixels SP may be formed on the substrate 110 to display images.

[0031] The display area AA and the non-display area NA can be defined in the substrate 110.

[0032] The display area AA is the area in the display device 100 where an image is displayed. Multiple subpixels SP can be disposed within the display area AA. The multiple subpixels SP are the smallest units constituting the display area AA and can include multiple light-emitting elements to emit light. The multiple subpixels SP can display different colors of light, such as red, green, and blue light, and different colors of images can be displayed through combinations of red, green, and blue light. Depending on the type of display device 100, the multiple light-emitting elements can be defined in different ways. For example, when the display device 100 is an inorganic light-emitting display device 100, the light-emitting elements can be light-emitting elements (LEDs) or micro-LEDs.

[0033] Within the display area AA, multiple signal lines are provided for transmitting various signals to multiple sub-pixels SP. For example, these multiple signal lines may include multiple power supply lines that supply power voltage to each of the multiple sub-pixels SP.

[0034] The non-display area NA is the area where no image is displayed, and can be defined as the area extending from the display area AA. Within the non-display area NA, connection lines, pad electrodes, or driver ICs for transmitting signals to the sub-pixels SP of the display area AA can be provided. Furthermore, the non-display area NA can be located on the rear surface of the display device 100, i.e., on the surface where no sub-pixels SP are disposed, or it can be omitted, and is not limited to the configuration shown in the figures.

[0035] Figure 2 This is an enlarged plan view of a display device according to an exemplary embodiment of the present disclosure. Figure 3 It is along Figure 2 The cross-sectional view taken by line A-A' in the diagram. Figure 2 This is a cross-sectional view of a sub-pixel SP of a first light-emitting element 120 among multiple light-emitting elements (LEDs). Figure 2 Except for color and planar shape, the second light-emitting element 130 and the third light-emitting element 140 are substantially the same in construction as the first light-emitting element 120. Therefore, their redundant description will be omitted. Furthermore, in Figure 2 For ease of description, only the area corresponding to a total of 12 sub-pixels SP is shown, and this can be repeated in the display device 100. Figure 2 The area shown.

[0036] Reference Figure 2 and Figure 3 The display device 100 includes a substrate 110, a first insulating layer 111, a second insulating layer 112, multiple light-emitting elements (LEDs), multiple assembly lines AL, multiple assembly electrodes AE, a first connecting electrode CE1, and a second connecting electrode CE2.

[0037] First, multiple assembly lines AL are provided on the substrate 110. These assembly lines AL are lines that generate an electric field for self-assembling multiple light-emitting elements (LEDs) during the manufacturing of the display device 100 and supply driving voltages to the LEDs when driving the display device 100. The assembly lines AL can be arranged along multiple sub-pixels SP arranged in the same row. The assembly lines AL can also be arranged to overlap with multiple sub-pixels SP arranged in the same column. For example, a first assembly line AL1 and a second assembly line AL2 can be arranged along multiple sub-pixels SP arranged in the same column.

[0038] Multiple assembly lines AL include multiple first assembly lines AL1 and multiple second assembly lines AL2. The multiple first assembly lines AL1 and multiple second assembly lines AL2 can be arranged alternately. The multiple first assembly lines AL1 and multiple second assembly lines AL2 can be arranged to be spaced apart from each other at a predetermined interval. In each of the multiple sub-pixels SP, one first assembly line AL1 and one second assembly line AL2 can be arranged to be adjacent to each other. When driving the display device 100, different driving voltages are applied to the multiple first assembly lines AL1 and multiple second assembly lines AL2, thereby driving multiple light-emitting elements (LEDs) in a passive matrix (PM) manner.

[0039] If multiple light-emitting elements (LEDs) are driven in a passive matrix manner, the display device 100 can be used as a lighting device, etc. For example, the display device 100 can be used as a lighting device capable of displaying different colors and illuminances by turning on or off all or some of the multiple light-emitting elements (LEDs). The display device 100 is not limited thereto, and may also include driving elements (e.g., driving transistors) and be driven in an active matrix (AM) manner.

[0040] Multiple mounting electrodes AE are disposed on the substrate 110 in each of the multiple sub-pixels SP. The multiple mounting electrodes AE include multiple first mounting electrodes AE1 and multiple second mounting electrodes AE2. The multiple first mounting electrodes AE1 can be connected to multiple first assembly lines AL1, and the multiple second mounting electrodes AE2 can be connected to multiple second assembly lines AL2. For example, the multiple first mounting electrodes AE1 can be integrally formed with the multiple first assembly lines AL1, and the multiple second mounting electrodes AE2 can be integrally formed with the multiple second assembly lines AL2, but are not limited thereto. The multiple assembly lines AL and the multiple mounting electrodes AE can be formed of the same material on the same plane, but are not limited thereto.

[0041] A pair of first mounting electrodes AE1 and second mounting electrodes AE2 can be configured to be adjacent to each other to form an electric field for self-assembling light-emitting elements (LEDs). The pair of first mounting electrodes AE1 and second mounting electrodes AE2 can be configured to overlap with the locations where light-emitting elements (LEDs) are disposed in multiple sub-pixels SP.

[0042] The planar shapes of the plurality of first assembly electrodes AE1 and the plurality of second assembly electrodes AE2 can be triangular. Therefore, the widths of the plurality of first assembly electrodes AE1 and the plurality of second assembly electrodes AE2 can gradually change. For example, the width of a first assembly electrode AE1 can decrease as it approaches a second assembly electrode AE2, and the width of a second assembly electrode AE2 can decrease as it approaches a first assembly electrode AE1. Furthermore, one of the three sides constituting a first assembly electrode AE1 can contact a first assembly line AL1, and the other two sides can extend from the first assembly line AL1. Similarly, one of the three sides constituting a second assembly electrode AE2 can contact a second assembly line AL2, and the other two sides can extend from the second assembly line AL2.

[0043] Multiple first assembly electrodes AE1 and multiple second assembly electrodes AE2 can be arranged to face each other. For example, the multiple first assembly electrodes AE1 can be arranged in the same column as the multiple second assembly electrodes AE2. Furthermore, the vertices of the first assembly electrodes AE1 and the vertices of the second assembly electrodes AE2 can face each other on the same line.

[0044] Multiple light-emitting elements (LEDs) can self-assemble within a pocket PC of each of multiple sub-pixels (SPs) by applying voltages to multiple first assembly lines AL1 and multiple first assembly electrodes AE1, and multiple second assembly lines AL2 and multiple second assembly electrodes AE2 to form an electric field. The LEDs are dielectrically polarized by the electric field to have polarity. Furthermore, the dielectrically polarized LEDs can be moved or fixed in a specific direction by dielectric electrophoresis (DEP) (i.e., the electric field). Therefore, multiple LEDs can self-assemble within the pocket PCs of multiple sub-pixels (SPs) using dielectric electrophoresis.

[0045] Multiple assembly lines AL and multiple assembly electrodes AE can be formed of conductive materials, such as copper (Cu), chromium (Cr), molybdenum (Mo), or molybdenum-titanium (MoTi) alloys, but are not limited thereto. Furthermore, multiple assembly lines AL and multiple assembly electrodes AE can be formed of multiple conductive layers. For example, multiple assembly lines AL and multiple assembly electrodes AE can have a multilayer structure including a conductive layer with superior conductivity and a covering layer configured to cover the conductive layer and have relatively strong corrosion resistance, but are not limited thereto.

[0046] At the same time, even Figure 3The diagram shows multiple assembly lines AL and multiple assembly electrodes AE with the same thickness, but this is not a limitation. For example, to reduce the line resistance of the multiple assembly lines AL, the thickness of the multiple assembly lines AL can be greater than the thickness of the multiple assembly electrodes AE. Therefore, it is easier to apply voltage from the multiple assembly lines AL to the multiple assembly electrodes AE.

[0047] A first insulating layer 111 is disposed on multiple assembly lines AL and multiple assembly electrodes AE. The first insulating layer 111 may be configured to cover the entire surface of the substrate 110 on which multiple assembly lines AL and multiple assembly electrodes AE are formed. The first insulating layer 111 may be configured as a single layer or multiple layers made of an organic insulating material (e.g., benzocyclobutene or acrylic organic material), but is not limited thereto.

[0048] The first insulating layer 111 may include a plurality of accommodating slots PC. The plurality of accommodating slots PC are openings in which a plurality of light-emitting elements (LEDs) self-assemble. Each of the plurality of accommodating slots PC may be formed at a position corresponding to each of a plurality of sub-pixels SP. The plurality of accommodating slots PC may be configured to overlap with the region between a pair of first mounting electrodes AE1 and second mounting electrodes AE2. The plurality of accommodating slots PC may be configured to correspond to the plurality of sub-pixels SP in a one-to-one manner. At least one of the first mounting electrodes AE1 and the second mounting electrodes AE2 may be exposed from each of the plurality of accommodating slots PC. For example, both the first mounting electrodes AE1 and the second mounting electrodes AE2 may overlap with the accommodating slots PC.

[0049] Each of the plurality of receiving slots PC may include a plurality of first receiving slots PC1, a plurality of second receiving slots PC2, and a plurality of third receiving slots PC3. The shape of each of the plurality of receiving slots PC may correspond to the shape of a plurality of light-emitting elements (LEDs). For example, the planar shape of each of the plurality of first receiving slots PC1 may correspond to the planar shape of a first light-emitting element 120, the planar shape of each of the plurality of second receiving slots PC2 may correspond to the planar shape of a second light-emitting element 130, and the planar shape of each of the plurality of third receiving slots PC3 may correspond to the planar shape of a third light-emitting element 140. For example, the plurality of first receiving slots PC1 may have a circular planar shape, the plurality of second receiving slots PC2 may have an elliptical planar shape, and the plurality of third receiving slots PC3 may have an elliptical planar shape different from that of the plurality of second receiving slots PC2. Therefore, each of the plurality of first receiving slots PC1, the plurality of second receiving slots PC2, and the plurality of third receiving slots PC3 may have different shapes.

[0050] The first receiving slot PC1, the second receiving slot PC2, and the third receiving slot PC3 can be arranged sequentially along the direction of the extension of the first assembly line AL1 and the second assembly line AL2.

[0051] Meanwhile, the long axis directions of the multiple second receiving slots PC2 can be parallel to the long axis directions of the multiple third receiving slots PC3. For example, the long axis directions of the multiple second receiving slots PC2 and the multiple third receiving slots PC3 can intersect with the directions in which the multiple assembly lines AL extend.

[0052] Each of the plurality of receiving slots PC can overlap with the vertices of the plurality of first mounting electrodes AE1 and the plurality of second mounting electrodes AE2. For example, the planar shape of each of the plurality of receiving slots PC can be a shape that surrounds the vertices of the first mounting electrodes AE1 and the vertices of the second mounting electrodes AE2.

[0053] Multiple light-emitting elements (LEDs) are arranged in each of multiple receiving slots (PCs).

[0054] Each of the plurality of light-emitting elements (LEDs) may include a plurality of first light-emitting elements 120, a plurality of second light-emitting elements 130, and a plurality of third light-emitting elements 140. For example, when the LEDs are self-assembled, they can be self-assembled at positions corresponding to each of the plurality of sub-pixels (SPs) using a plurality of LEDs with different shapes. Specifically, the plurality of first light-emitting elements 120 may have a circular planar shape, the plurality of second light-emitting elements 130 may have an elliptical planar shape, and the plurality of third light-emitting elements 140 may have an elliptical planar shape different from the elliptical planar shape of the plurality of second light-emitting elements 130. However, the shapes of the plurality of LEDs are exemplary and not limited thereto.

[0055] The first light-emitting element 120, the second light-emitting element 130, and the third light-emitting element 140 can be arranged sequentially along the direction of the extension of the first assembly line AL1 and the second assembly line AL2.

[0056] Meanwhile, the long axis directions of the plurality of second light-emitting elements 130 and the long axis directions of the plurality of third light-emitting elements 140 can be parallel to each other. For example, the long axis directions of the plurality of second light-emitting elements 130 and the long axis directions of the plurality of third light-emitting elements 140 can intersect with the directions in which the plurality of assembly lines AL extend.

[0057] Each of the plurality of light-emitting elements (LEDs) may overlap with the vertices of the plurality of first mounting electrodes AE1 and the plurality of second mounting electrodes AE2. For example, the planar shape of each of the plurality of light-emitting elements (LEDs) may be a circle and / or an ellipse surrounding the vertices of the first mounting electrodes AE1 and the second mounting electrodes AE2.

[0058] Each light-emitting element (LED) may include a first semiconductor layer, a light-emitting layer, a second semiconductor layer, a first electrode, a second electrode, and an encapsulation layer.

[0059] For example, refer to Figure 3 The first light-emitting element 120 includes a first semiconductor layer 121, a light-emitting layer 122, a second semiconductor layer 123, a first electrode 124, a second electrode 125, and an encapsulation layer 126.

[0060] First, a first semiconductor layer 121 is disposed on a plurality of mounting electrodes AE, and a second semiconductor layer 123 is disposed on the first semiconductor layer 121. The first semiconductor layer 121 and the second semiconductor layer 123 can be semiconductor layers doped with n-type and p-type impurities. For example, each of the first semiconductor layer 121 and the second semiconductor layer 123 can be a semiconductor layer doped with n-type and p-type impurities in a material such as gallium nitride (GaN), indium aluminum phosphide (InAlP), or gallium arsenide (GaAs). Furthermore, the p-type impurities can be magnesium (Mg), zinc (Zn), beryllium (Be), etc., and the n-type impurities can be silicon (Si), germanium, tin (Sn), etc., but are not limited thereto.

[0061] A light-emitting layer 122 is disposed between a first semiconductor layer 121 and a second semiconductor layer 123. The light-emitting layer 122 can receive holes and electrons from the first semiconductor layer 121 and the second semiconductor layer 123 to emit light. The light-emitting layer 122 can be formed of a single-layer or multiple quantum well (MQW) structure, and can be formed, for example, of indium gallium nitride (InGaN) or gallium nitride (GaN), but is not limited thereto.

[0062] A first electrode 124 is disposed on the first semiconductor layer 121. The first electrode 124 is used to electrically connect the first connecting electrode CE1 to the first semiconductor layer 121. The first electrode 124 may be disposed on the top surface of the first semiconductor layer 121 exposed from the light-emitting layer 122 and the second semiconductor layer 123. Meanwhile, Figure 3 Two first electrodes 124 are shown disposed on the top surface of the first semiconductor layer 121, but are not limited thereto. The first electrodes 124 may be made of conductive materials, such as transparent conductive materials, such as indium tin oxide (ITO) or indium zinc oxide (IZO), or opaque conductive materials, such as titanium (Ti), gold (Au), silver (Ag), copper (Cu), or alloys of the aforementioned metals, but are not limited thereto.

[0063] The second electrode 125 is disposed on the second semiconductor layer 123. The second electrode 125 may be disposed on the top surface of the second semiconductor layer 123. The second electrode 125 is an electrode that electrically connects the second connecting electrode CE2 and the second semiconductor layer 123. The second electrode 125 may be made of a conductive material, such as a transparent conductive material (e.g., indium tin oxide (ITO) or indium zinc oxide (IZO)), or an opaque conductive material (e.g., titanium (Ti), gold (Au), silver (Ag), copper (Cu), or an alloy of the aforementioned metals), but is not limited thereto.

[0064] The encapsulation layer 126 is configured to surround the first semiconductor layer 121, the light-emitting layer 122, the second semiconductor layer 123, the first electrode 124, and the second electrode 125. The encapsulation layer 126 may be formed of an insulating material to protect the first semiconductor layer 121, the light-emitting layer 122, and the second semiconductor layer 123. The encapsulation layer 126 may cover the side and top surfaces of the first semiconductor layer 121, the side surface of the light-emitting layer 122, the side and top surfaces of the second semiconductor layer 123, the first electrode 124, and the second electrode 125. Contact holes exposing the first electrode 124 and the second electrode 125 are formed in the encapsulation layer 126 to electrically connect the first connecting electrode CE1 and the second connecting electrode CE2 to the first electrode 124 and the second electrode 125, respectively.

[0065] The encapsulation layer 126 can be formed of a transparent insulating material, and for example, it can be made of silicon oxide (SiO2). x ) or silicon nitride (SiN) x It may consist of a single or double layer, but is not limited to this.

[0066] A second insulating layer 112 is disposed on the light-emitting element LED and the first insulating layer 111. The second insulating layer 112 may be configured to cover the first insulating layer 111 and the light-emitting element LED. The second insulating layer 112 is configured to cover the light-emitting element LED to fix and protect the light-emitting element LED. The second insulating layer 112 may be configured as a single layer or multiple layers made of organic insulating material (e.g., benzocyclobutene or acrylic-based organic material), but is not limited thereto.

[0067] A first connection electrode CE1 is disposed on the second insulating layer 112 in each of the plurality of sub-pixels SP. The first connection electrode CE1 is an electrode for electrically connecting the light-emitting element LED to the first assembly line AL1. For example, the first connection electrode CE1 can be connected to any one of the plurality of first electrodes of the light-emitting element LED through contact holes formed in the second insulating layer 112. The first connection electrode CE1 can be connected to the first assembly line AL1 through contact holes formed in the second insulating layer 112 and the first insulating layer 111. Therefore, the first electrode and the first semiconductor layer of the light-emitting element LED can be electrically connected to the first assembly line AL1 through the first connection electrode CE1.

[0068] The second connection electrode CE2 can be disposed on the second insulating layer 112 and spaced apart from the first connection electrode CE1 in each of the plurality of sub-pixels SP. The second connection electrode CE2 is an electrode for electrically connecting the light-emitting element LED to the second assembly line AL2. The second connection electrode CE2 can be connected to the second electrode of the light-emitting element LED through contact holes formed in the second insulating layer 112. The second connection electrode CE2 can be connected to the second assembly line AL2 through contact holes formed in the second insulating layer 112 and the first insulating layer 111. Therefore, the second electrode of the light-emitting element LED and the second semiconductor layer can be electrically connected to the second assembly line AL2 through the second connection electrode CE2.

[0069] The first connecting electrode CE1 and the second connecting electrode CE2 can be formed of a transparent conductive material so that the light emitted from the light-emitting element LED can propagate toward the upper side of the substrate 110. For example, the first connecting electrode CE1 and the second connecting electrode CE2 can be made of a transparent conductive material, such as indium tin oxide (ITO) or indium zinc oxide (IZO), but are not limited thereto.

[0070] Reference Figure 3 Multiple receiving slots PC can be disposed in the region between the first assembly electrode AE1 and the second assembly electrode AE2. The center of the receiving slot PC can correspond to the central region between the first assembly electrode AE1 and the second assembly electrode AE2.

[0071] The width of the receiving slot PC can be greater than the maximum width of the light-emitting element LED, allowing the LED to be placed within the receiving slot PC. Because the receiving slot PC has a larger size than the LED, the LED, which is self-assembled within the receiving slot PC, can be positioned on the first mounting electrode AE1 and the second mounting electrode AE2 without interfering with the receiving slot PC.

[0072] On the other hand, dielectric forces concentrate at the edges of the mounting electrodes. Therefore, when the edges of the mounting electrodes do not overlap with the receiving groove, the light-emitting element is assembled in an unstable state within the receiving groove, leading to unstable fixation of the light-emitting element or potential deterioration of the electrical contact between the light-emitting element and the connecting electrode. Furthermore, when the light-emitting element is assembled in the receiving groove, the assembled light-emitting element is biased towards the corner side where the mounting electrode is located, potentially resulting in another light-emitting element being placed in the space between the light-emitting element formed on the other side and the receiving groove.

[0073] Therefore, in the display device 100 according to an exemplary embodiment of the present disclosure, the plurality of receiving slots PC overlap with the vertices of the plurality of first mounting electrodes AE1 and the vertices of the plurality of second mounting electrodes AE2. Thus, since the region generating the strongest dielectric force is located in the plurality of receiving slots PC, the plurality of light-emitting elements LEDs can be stably assembled and fixed in the plurality of receiving slots PC.

[0074] At this point, since multiple light-emitting elements (LEDs) are assembled in multiple accommodating slots (PCs), no space needs to be created in a PC accommodating one LED for assembling another LED. Therefore, only one LED is assembled in a PC accommodating slot, which improves the assembly yield of multiple LEDs and optimizes the process.

[0075] As described above, since the dielectric force is concentrated at the corners of the mounting electrodes AE, the multiple light-emitting elements (LEDs) can be stably fixed without overlapping one after another in the multiple receiving slots PC when the electric field force applied between the first mounting electrodes AE1 and the second mounting electrodes AE2, which are located at positions spaced apart from each other, is not dispersed. Therefore, preferably, the multiple receiving slots PC overlap with the vertices of the multiple first mounting electrodes AE1 and the multiple second mounting electrodes AE2, and one vertex of the first mounting electrode AE1 and one vertex of the multiple second mounting electrodes AE2 overlap in the receiving slot PC respectively. The vertices of the first mounting electrodes AE1 and the multiple second mounting electrodes AE2 overlapping in the receiving slot PC can be spaced apart from each other so that they are located opposite each other with respect to the major axis of the receiving slot PC, which has an elliptical planar shape. That is, the vertices of the first mounting electrodes AE1 and the multiple second mounting electrodes AE2 overlapping in the receiving slot PC can be spaced apart from each other along the major axis of the second receiving slot PC2 and the major axis of the third receiving slot PC3.

[0076] Figure 4 This is an enlarged plan view of a display device according to another exemplary embodiment of the present disclosure. In addition to the plurality of receiving slots PC and the plurality of mounting electrodes AE, Figure 4 The display device 400 is configured with Figures 1 to 3 The display device 100 is largely the same. Therefore, repeated descriptions of the same components will be omitted.

[0077] Reference Figure 4 It is provided with multiple first assembly electrodes AE1 and multiple second assembly electrodes AE2 for self-assembling multiple light-emitting elements (LEDs).

[0078] The widths of the plurality of first assembly electrodes AE1 and the plurality of second assembly electrodes AE2 can be the same. For example, the planar shape of each of the plurality of first assembly electrodes AE1 and the planar shape of each of the plurality of second assembly electrodes AE2 can be rectangular.

[0079] Each of the plurality of first assembly electrodes AE1 can be configured to be offset from the plurality of second assembly electrodes AE2 in both the row and column directions, and each of the plurality of second assembly electrodes AE2 can be configured to be offset from the plurality of first assembly electrodes AE1 in both the row and column directions. For example, each of the plurality of first assembly electrodes AE1 can be correspondingly disposed between the plurality of second assembly electrodes AE2, and each of the plurality of second assembly electrodes AE2 can be correspondingly disposed between the plurality of first assembly electrodes AE1.

[0080] In this configuration, the edges of the first assembly electrode AE1 and the second assembly electrode AE2 can be positioned on the same plane. Therefore, the vertices of the first assembly electrode AE1 and the second assembly electrode AE2 can face each other on the same line. However, this disclosure is not limited to this, and the vertices of the first assembly electrode AE1 and the second assembly electrode AE2 can be positioned on different lines. For example, the vertices of the second assembly electrode AE2 can be positioned between adjacent vertices of the first assembly electrode AE1, and the vertices of the first assembly electrode AE1 can be positioned between adjacent vertices of the second assembly electrode AE2.

[0081] Multiple receiving slots PC can be configured to overlap with the vertices of multiple first assembly electrodes AE1 and multiple second assembly electrodes AE2. Therefore, one of the multiple first assembly electrodes AE1 can overlap with a portion of two adjacent receiving slots PC, and one of the multiple second assembly electrodes AE2 can overlap with a portion of two adjacent receiving slots PC. For example, one first assembly electrode AE1 can overlap with a portion of a first receiving slot PC1 and a portion of a second receiving slot PC2, another first assembly electrode AE1 can overlap with a portion of a second receiving slot PC2 and a portion of a third receiving slot PC3, and another first assembly electrode AE1 can overlap with a portion of a first receiving slot PC1 and a portion of a third receiving slot PC3. Furthermore, one second assembly electrode AE2 can overlap with a portion of a first receiving slot PC1 and a portion of a second receiving slot PC2, another second assembly electrode AE2 can overlap with a portion of a second receiving slot PC2 and a portion of a third receiving slot PC3, and another second assembly electrode AE2 can overlap with a portion of a first receiving slot PC1 and a portion of a third receiving slot PC3.

[0082] Reference Figure 4 The first receiving slot PC1, the second receiving slot PC2 and the third receiving slot PC3 can be arranged sequentially along the direction of the extension of the first assembly line AL1 and the second assembly line AL2.

[0083] The major axes of the second receiving groove PC2 and the third receiving groove PC3 can be arranged diagonally to the directions in which the multiple assembly electrodes AE extend. In this case, the major axes of the second receiving groove PC2 and the third receiving groove PC3 can be different from each other. For example, the major axis of the second receiving groove PC2 can intersect with the major axis of the third receiving groove PC3.

[0084] Furthermore, when the plurality of receiving slots PC are composed of a first receiving slot PC1, a second receiving slot PC2, and a third receiving slot PC3, the major axes of adjacent second receiving slots PC2 may intersect each other, and the major axes of adjacent third receiving slots PC3 may intersect each other. However, this disclosure is not limited thereto. When the plurality of receiving slots PC also includes a fourth receiving slot, the major axes of adjacent second receiving slots PC2 may be parallel to each other, and the major axes of adjacent third receiving slots PC3 may be parallel to each other.

[0085] The light-emitting elements (LEDs) are disposed in each of the multiple receiving slots (PCs).

[0086] In a display device 400 according to another exemplary embodiment of the present disclosure, a plurality of receiving slots PC overlap with the vertices of a plurality of first mounting electrodes AE1 and a plurality of second mounting electrodes AE2. Therefore, since the region generating the strongest dielectric force is located within the plurality of receiving slots PC, a plurality of light-emitting elements (LEDs) can be stably assembled and fixed within the plurality of receiving slots PC, and only one LED can be assembled within one receiving slot PC. This improves the assembly yield of the LEDs and enables process optimization.

[0087] In a display device 400 according to another exemplary embodiment of the present disclosure, the number of light-emitting elements (LEDs) that can be assembled using polygonal mounting electrodes AE can be increased. For example, when the planar shape of the mounting electrode AE ​​is quadrilateral, two receiving slots PC that overlap with the vertices of the first mounting electrode AE1 and the second mounting electrode AE2 can be disposed on one first mounting electrode AE1 and one second mounting electrode AE2. Therefore, in the display device 400 according to another exemplary embodiment of the present disclosure, the number of light-emitting elements (LEDs) that can be assembled using a pair of mounting electrodes AE can be increased. Therefore, the assembly resolution of multiple light-emitting elements (LEDs) can be increased, and the integration density can be increased.

[0088] In a display device 400 according to another exemplary embodiment of the present disclosure, the major axes of the second receiving groove PC2 and the third receiving groove PC3, which have elliptical planar shapes, are arranged in the direction of extension and diagonal direction of the plurality of mounting electrodes AE, so as to stably assemble and fix the plurality of light-emitting elements LEDs in the plurality of receiving grooves PC, thereby enhancing the dielectric force formed along the inclined direction at the corners of the plurality of mounting electrodes AE. Therefore, in the display device 400 according to another exemplary embodiment of the present disclosure, the major axes of the second receiving groove PC2 and the third receiving groove PC3 can be arranged in the diagonal direction of the mounting electrodes AE with strong dielectric force, thereby improving the assembly yield of the plurality of light-emitting elements LED.

[0089] Figure 5 This is an enlarged plan view of a display device according to yet another exemplary embodiment of the present disclosure. In addition to the plurality of mounting electrodes AE, Figure 5 The display device 500 is configured with Figure 4 The display device 400 is largely the same. Therefore, repeated descriptions of the same components will be omitted.

[0090] Reference Figure 5 It is provided with multiple first assembly electrodes AE1 and multiple second assembly electrodes AE2 for self-assembling multiple light-emitting elements (LEDs).

[0091] The widths of the plurality of first assembly electrodes AE1 and the plurality of second assembly electrodes AE2 can vary gradually. Specifically, the width of the plurality of second assembly electrodes AE2 increases as they approach the plurality of first assembly electrodes AE1. The width of the plurality of first assembly electrodes AE1 increases as they approach the plurality of second assembly electrodes AE2. For example, the planar shape of the plurality of first assembly electrodes AE1 and the plurality of second assembly electrodes AE2 can be trapezoidal.

[0092] Reference Figure 5 Multiple receiving slots PC can be configured to overlap with the vertices of multiple first assembly electrodes AE1 and multiple second assembly electrodes AE2.

[0093] In a display device 500 according to yet another exemplary embodiment of the present disclosure, a plurality of receiving slots PC overlap with the vertices of a plurality of first mounting electrodes AE1 and a plurality of second mounting electrodes AE2. Therefore, since the region generating the strongest dielectric force is located within the plurality of receiving slots PC, a plurality of light-emitting elements (LEDs) can be stably assembled and fixed within the plurality of receiving slots PC, and only one LED can be assembled within one receiving slot PC. This improves the assembly yield of the LEDs and enables process optimization.

[0094] In a display device 500 according to yet another exemplary embodiment of the present disclosure, the number of light-emitting elements (LEDs) that can be assembled using polygonal assembly electrodes AE can be increased, thereby increasing the assembly resolution.

[0095] In a display device 500 according to yet another exemplary embodiment of the present disclosure, the long axis directions of the second receiving groove PC2 and the third receiving groove PC3 can be arranged in the diagonal direction of the assembly electrode AE ​​that generates a strong electrophoretic force, thereby improving the assembly yield of multiple light-emitting elements LED.

[0096] Figure 6 This is an enlarged plan view of a display device according to yet another exemplary embodiment of the present disclosure. In addition to multiple assembly lines AL, Figure 6 The display device 600 is configured with Figure 5 The display device 500 is largely the same. Therefore, repeated descriptions of the same components will be omitted.

[0097] Multiple assembly lines AL are provided, each connected to a plurality of assembly electrodes AE. For example, a plurality of first assembly electrodes AE1 can be connected to a plurality of first assembly lines AL1, and a plurality of second assembly electrodes AE2 can be connected to a plurality of second assembly lines AL2.

[0098] Reference Figure 6 The edges of each of the multiple assembly lines AL can include multiple recesses CP. For example, the edges of multiple first assembly lines AL1 and multiple second assembly lines AL2 can include multiple recesses CP.

[0099] Multiple recesses CP of multiple first assembly lines AL1 can be provided at the edges of multiple first assembly lines AL1 facing multiple second assembly lines AL2, and multiple recesses CP of multiple second assembly lines AL2 can be provided at the edges of multiple second assembly lines AL2 facing multiple first assembly lines AL1.

[0100] Meanwhile, the recess CP of the first assembly line AL1 can face the second assembly electrode AE2, and the recess CP of the second assembly line AL2 can face the first assembly electrode AE1. Therefore, the recess CP of the first assembly line AL1 and the recess CP of the second assembly line AL2 can be set to be staggered in the row direction and column direction, but are not limited thereto.

[0101] Furthermore, multiple recesses CP can be alternately arranged with multiple assembly electrodes AE. For example, recesses CP of the first assembly line AL1 can be arranged between the first assembly electrodes AE1, and multiple recesses CP of the second assembly line AL2 can be arranged between the second assembly electrodes AE2.

[0102] Furthermore, the recess CP of the first assembly line AL1 and the recess CP of the second assembly line AL2 can be provided between adjacent receiving slots PC.

[0103] In a display device 600 according to yet another exemplary embodiment of the present disclosure, a plurality of receiving slots PC overlap with the vertices of a plurality of first mounting electrodes AE1 and a plurality of second mounting electrodes AE2. Therefore, since the region generating the strongest dielectric force is located within the plurality of receiving slots PC, a plurality of light-emitting elements (LEDs) can be stably assembled and fixed within the plurality of receiving slots PC, and only one LED can be assembled within one receiving slot PC. This improves the assembly yield of the LEDs and enables process optimization.

[0104] In a display device 600 according to yet another exemplary embodiment of the present disclosure, the number of light-emitting elements (LEDs) that can be assembled using polygonal assembly electrodes AE can be increased, thereby increasing the assembly resolution.

[0105] In a display device 600 according to yet another exemplary embodiment of the present disclosure, the long axis directions of the second receiving groove PC2 and the third receiving groove PC3 can be arranged in the diagonal direction of the assembly electrode AE ​​that generates a strong dielectric force, thereby improving the assembly yield of multiple light-emitting elements LED.

[0106] In a display device 600 according to yet another exemplary embodiment of the present disclosure, a plurality of first assembly lines AL1 include a plurality of recesses CP facing a plurality of second assembly electrodes AE2, and a plurality of second assembly lines AL2 include a plurality of recesses CP facing a plurality of first assembly electrodes AE1, to increase the relative magnitude of the dielectric force formed in a plurality of receiving grooves PC. For example, in non-overlapping regions with the plurality of receiving grooves PC, as the distance between the plurality of second assembly electrodes AE2 and the plurality of first assembly lines AL1 increases, and as the distance between the plurality of first assembly electrodes AE1 and the plurality of second assembly lines AL2 increases, the dielectric force formed outside the plurality of receiving grooves PC can be reduced. On the other hand, the relative magnitude of the dielectric force formed in the plurality of receiving grooves PC can be increased. That is, in non-overlapping regions with the plurality of receiving grooves PC, as the distance between the plurality of assembly electrodes AE and the plurality of assembly lines AL increases, the relative magnitude of the dielectric force formed in the plurality of receiving grooves PC can be increased. Therefore, in a display device 600 according to another exemplary embodiment of the present disclosure, by providing multiple assembly lines AL including multiple recesses CP, the relative magnitude of the dielectric force formed in the multiple receiving grooves PC is enhanced, and the assembly yield of the multiple light-emitting elements LED is improved.

[0107] Exemplary embodiments of this disclosure can also be described as follows: A display device according to an embodiment of the present disclosure includes: a substrate having a plurality of sub-pixels defined thereon; a plurality of first mounting electrodes and a plurality of second mounting electrodes disposed in each of the plurality of sub-pixels, the plurality of second mounting electrodes being spaced apart from the plurality of first mounting electrodes; a first insulating layer disposed on the plurality of first mounting electrodes and the plurality of second mounting electrodes and including a plurality of receiving grooves overlapping the plurality of sub-pixels; and a plurality of light-emitting elements disposed in the plurality of receiving grooves of the first insulating layer, each of the plurality of receiving grooves overlapping the vertices of the plurality of first mounting electrodes and the plurality of second mounting electrodes.

[0108] According to another aspect of this disclosure, one of the plurality of receiving slots may overlap with one of the vertices of the plurality of first assembly electrodes and one of the vertices of the plurality of second assembly electrodes.

[0109] According to another aspect of this disclosure, the plurality of receiving slots may include a plurality of elliptical receiving slots having an elliptical planar shape, and the vertices of the plurality of first mounting electrodes and the plurality of second mounting electrodes may be spaced apart from each other along the major axis of the plurality of elliptical receiving slots.

[0110] According to another aspect of this disclosure, the planar shape of each of the plurality of first assembly electrodes and the plurality of second assembly electrodes is triangular, and the plurality of first assembly electrodes and the plurality of second assembly electrodes may be configured to face each other.

[0111] According to another aspect of this disclosure, the plurality of receiving slots may include a plurality of elliptical receiving slots having an elliptical planar shape, and the major axes of the plurality of elliptical receiving slots may be configured to be parallel to each other.

[0112] According to another aspect of this disclosure, each of the plurality of first assembly electrodes may be correspondingly disposed between the plurality of second assembly electrodes.

[0113] According to another aspect of this disclosure, the planar shape of each of the plurality of first assembly electrodes and the plurality of second assembly electrodes can be trapezoidal.

[0114] According to another aspect of this disclosure, one of the plurality of first assembly electrodes may overlap with a portion of two adjacent receiving slots in the plurality of receiving slots, and one of the plurality of second assembly electrodes may overlap with a portion of two adjacent receiving slots in the plurality of receiving slots.

[0115] According to another aspect of this disclosure, the plurality of receiving slots may include a plurality of elliptical receiving slots having an elliptical planar shape, and the major axes of adjacent elliptical receiving slots may be arranged in directions that intersect each other.

[0116] According to another aspect of this disclosure, the display device may further include a plurality of first assembly lines connected to a plurality of first assembly electrodes and a plurality of second assembly lines connected to a plurality of second assembly electrodes. The plurality of first assembly lines may include a plurality of recesses disposed in a direction facing the plurality of second assembly electrodes, and the plurality of second assembly lines may include a plurality of recesses disposed in a direction facing the plurality of first assembly electrodes.

[0117] A display device according to another embodiment of the present disclosure includes: a substrate having a plurality of sub-pixels defined thereon; a plurality of first mounting electrodes and a plurality of second mounting electrodes disposed in each of the plurality of sub-pixels, the plurality of second mounting electrodes being spaced apart from the plurality of first mounting electrodes; a first insulating layer disposed on the plurality of first mounting electrodes and the plurality of second mounting electrodes, and including a plurality of receiving grooves overlapping the plurality of sub-pixels; and a plurality of light-emitting elements disposed in the plurality of receiving grooves of the first insulating layer, wherein the planar shape of each of the plurality of receiving grooves surrounds one vertex of the plurality of first mounting electrodes and one vertex of the plurality of second mounting electrodes.

[0118] According to another aspect of this disclosure, the widths of the plurality of first assembly electrodes and the widths of the plurality of second assembly electrodes can vary gradually.

[0119] According to another aspect of this disclosure, the width of the plurality of second assembly electrodes may decrease as they approach the plurality of first assembly electrodes, and the width of the plurality of first assembly electrodes may decrease as they approach the plurality of second assembly electrodes.

[0120] According to another aspect of this disclosure, the width of the plurality of second assembly electrodes may increase as they approach the plurality of first assembly electrodes, and the width of the plurality of first assembly electrodes may increase as they approach the plurality of second assembly electrodes.

[0121] According to another aspect of this disclosure, a plurality of first assembly electrodes may be arranged in the same column as a plurality of second assembly electrodes.

[0122] According to another aspect of this disclosure, each of the plurality of first assembly electrodes may be configured to be offset from the plurality of second assembly electrodes in both the row and column directions.

[0123] According to another aspect of this disclosure, the display device may further include a plurality of first assembly lines connected to a plurality of first assembly electrodes, and a plurality of second assembly lines connected to a plurality of second assembly electrodes. The plurality of first assembly lines may include a plurality of recesses disposed at edges facing the plurality of second assembly lines, and the plurality of second assembly lines may include a plurality of recesses disposed at edges facing the plurality of first assembly lines.

[0124] According to another aspect of this disclosure, multiple recesses of multiple first assembly lines can be disposed between multiple first assembly electrodes, and multiple recesses of multiple second assembly lines can be disposed between multiple second assembly electrodes.

[0125] A display device according to another embodiment of the present disclosure includes: a substrate having a plurality of sub-pixels defined thereon; a first assembly line and a second assembly line configured to be spaced apart from each other at a predetermined interval in a sub-pixel row or sub-pixel column; a plurality of first assembly electrodes connected to the first assembly line; a plurality of second assembly electrodes connected to the second assembly line, the plurality of second assembly electrodes being spaced apart from the plurality of first assembly electrodes; a first insulating layer disposed on the plurality of first assembly electrodes and the plurality of second assembly electrodes, and including a plurality of receiving grooves; and a plurality of light-emitting elements disposed in the plurality of receiving grooves, wherein each of the plurality of receiving grooves overlaps with a vertex of a first assembly electrode and a corresponding vertex of a second assembly electrode.

[0126] According to another aspect of this disclosure, a plurality of first assembly electrodes may extend from a first assembly line toward a second assembly line, and a plurality of second assembly electrodes may extend from the second assembly line toward the first assembly line.

[0127] Although exemplary embodiments of the present disclosure have been described in detail with reference to the accompanying drawings, the present disclosure is not limited thereto and may be embodied in many different forms without departing from the technical concept of the present disclosure. Therefore, the exemplary embodiments of the present disclosure are provided for illustrative purposes only and are not intended to limit the technical concept of the present disclosure. The scope of the technical concept of the present disclosure is not limited thereto. Therefore, it should be understood that the above exemplary embodiments are illustrative in all respects and do not limit the present disclosure.

Claims

1. A display device, comprising: A substrate having a plurality of sub-pixels defined thereon; A plurality of first mounting electrodes and a plurality of second mounting electrodes are disposed in each of the plurality of sub-pixels, wherein the plurality of second mounting electrodes are spaced apart from the plurality of first mounting electrodes; A first insulating layer is disposed on the plurality of first mounting electrodes and the plurality of second mounting electrodes and includes a plurality of accommodating grooves overlapping the plurality of sub-pixels; as well as Multiple light-emitting elements are disposed in the multiple receiving grooves of the first insulating layer. Each of the plurality of receiving slots overlaps with the apex of the plurality of first assembly electrodes and the apex of the plurality of second assembly electrodes.

2. The display device according to claim 1, wherein, One of the plurality of receiving slots overlaps with one of the vertices of the plurality of first assembly electrodes and one of the vertices of the plurality of second assembly electrodes.

3. The display device according to claim 1, wherein, The plurality of receiving slots includes a plurality of elliptical receiving slots having an elliptical planar shape, and The vertices of the plurality of first assembly electrodes and the vertices of the plurality of second assembly electrodes are spaced apart from each other along the major axis of the plurality of elliptical mounting slots.

4. The display device according to claim 1, wherein, The planar shape of each of the plurality of first assembly electrodes and the plurality of second assembly electrodes is triangular, and the plurality of first assembly electrodes and the plurality of second assembly electrodes are arranged to face each other.

5. The display device according to claim 1, wherein, The plurality of receiving slots includes a plurality of elliptical receiving slots having an elliptical planar shape, and The major axes of the plurality of elliptical positioning slots are set to be parallel to each other.

6. The display device according to claim 1, wherein, Each of the plurality of first assembly electrodes is correspondingly disposed between the plurality of second assembly electrodes.

7. The display device according to claim 6, wherein, The planar shape of each of the plurality of first assembly electrodes and the plurality of second assembly electrodes is trapezoidal.

8. The display device according to claim 1, wherein, One of the plurality of first assembly electrodes overlaps with a portion of two adjacent receiving slots in the plurality of receiving slots, and One of the plurality of second assembly electrodes overlaps with a portion of two adjacent receiving slots in the plurality of receiving slots.

9. The display device according to claim 1, wherein, The plurality of receiving slots includes a plurality of elliptical receiving slots having an elliptical planar shape, and The major axes of adjacent elliptical grooves in the plurality of elliptical grooves are arranged in directions that intersect each other.

10. The display device according to claim 1, further comprising: Multiple first assembly lines are connected to the multiple first assembly electrodes; as well as Multiple second assembly lines are connected to the multiple second assembly electrodes. The plurality of first assembly lines include a plurality of recesses disposed in the direction facing the plurality of second assembly electrodes, and The plurality of second assembly lines include a plurality of recesses disposed in a direction facing the plurality of first assembly electrodes.

11. A display device, comprising: A substrate having a plurality of sub-pixels defined thereon; A plurality of first mounting electrodes and a plurality of second mounting electrodes are disposed in each of the plurality of sub-pixels, wherein the plurality of second mounting electrodes are spaced apart from the plurality of first mounting electrodes; A first insulating layer is disposed on the plurality of first mounting electrodes and the plurality of second mounting electrodes, and includes a plurality of accommodating grooves overlapping the plurality of sub-pixels; as well as Multiple light-emitting elements are disposed in the multiple receiving grooves of the first insulating layer. The planar shape of each of the plurality of receiving slots surrounds one vertex of the plurality of first assembly electrodes and one vertex of the plurality of second assembly electrodes.

12. The display device according to claim 11, wherein, The widths of the plurality of first assembly electrodes and the plurality of second assembly electrodes gradually change.

13. The display device according to claim 12, wherein, The width of the plurality of second mounting electrodes decreases as they approach the plurality of first mounting electrodes, and The width of the plurality of first assembly electrodes decreases as they approach the plurality of second assembly electrodes.

14. The display device according to claim 12, wherein, The width of the plurality of second mounting electrodes increases as they approach the plurality of first mounting electrodes, and The width of the plurality of first assembly electrodes increases as they approach the plurality of second assembly electrodes.

15. The display device according to claim 11, wherein, The plurality of first assembly electrodes are arranged in the same column as the plurality of second assembly electrodes.

16. The display device according to claim 11, wherein, Each of the plurality of first assembly electrodes is configured to be offset from the plurality of second assembly electrodes in both the row and column directions.

17. The display device according to claim 11, further comprising: Multiple first assembly lines are connected to the multiple first assembly electrodes; as well as Multiple second assembly lines are connected to the multiple second assembly electrodes. The plurality of first assembly lines include a plurality of recesses disposed at the edges facing the plurality of second assembly lines, and The plurality of second assembly lines include a plurality of recesses located at the edges facing the plurality of first assembly lines.

18. The display device according to claim 17, wherein, The plurality of recesses of the plurality of first assembly lines are disposed between the plurality of first assembly electrodes, and The plurality of recesses of the plurality of second assembly lines are disposed between the plurality of second assembly electrodes.

19. A display device, comprising: A substrate having a plurality of sub-pixels defined thereon; The first assembly line and the second assembly line are set to be spaced apart from each other at a predetermined interval in the sub-pixel row or sub-pixel column; Multiple first assembly electrodes are connected to the first assembly line; A plurality of second assembly electrodes are connected to the second assembly line, the plurality of second assembly electrodes being spaced apart from the plurality of first assembly electrodes; A first insulating layer is disposed on the plurality of first assembly electrodes and the plurality of second assembly electrodes, and includes a plurality of receiving grooves; as well as Multiple light-emitting elements are respectively disposed in the multiple receiving slots. Each of the plurality of accommodating slots overlaps with the vertex of a first assembly electrode and the vertex of a corresponding second assembly electrode.

20. The display device according to claim 19, wherein, The plurality of first assembly electrodes extend from the first assembly line toward the second assembly line, and The plurality of second assembly electrodes extend from the second assembly line toward the first assembly line.

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