Display device and method for manufacturing the same

Abstract

The present disclosure provides a display device and a method for manufacturing the display device. The display device includes: a first electrode; a second electrode arranged to be separated from the first electrode and facing the first electrode; a first insulating pattern having at least a partial area arranged to overlap with the first electrode and having a first side separated from the first end of the first electrode; a second insulating pattern having at least a partial area arranged to overlap with the second electrode and having a second side separated from the second end of the second electrode facing the first end, the second side facing the first side; at least one concave-convex pattern arranged on the first insulating pattern and the second insulating pattern; and at least one light-emitting element arranged between the first insulating pattern and the second insulating pattern and having opposite ends electrically connected to the first electrode and the second electrode, respectively.

Description

Technical Field

[0001] The present disclosure relates to a display device and a method for manufacturing the display device. Background Art

[0002] As multimedia develops, the importance of display devices is increasing. Therefore, various display devices such as organic light emitting display (OLED) devices and liquid crystal display (LCD) devices are being used.

[0003] A display panel such as an OLED panel or an LCD panel is a device included in a display device to display an image. In these display panels, a light-emitting element may be provided in the light-emitting display panel, and examples of light-emitting diodes (LEDs) include organic LEDs using organic materials as fluorescent materials and inorganic LEDs using inorganic materials as fluorescent materials.

[0004] Inorganic LEDs using inorganic semiconductors as fluorescent materials have durability even in high temperature environments and have higher blue light efficiency than organic LEDs. In the manufacturing process pointed out as a limitation of existing inorganic LED elements, a transfer method using a dielectrophoresis (DEP) method has been developed. Therefore, research is ongoing on inorganic light emitting diodes having higher durability and efficiency than those of organic light emitting diodes. Summary of the invention

[0005] Technical issues

[0006] An aspect of the present disclosure provides a display device including a concavo-convex pattern for emitting light emitted from a light emitting element upward.

[0007] Aspects of the present disclosure also provide a manufacturing process for a display device, wherein the display device includes a concavo-convex pattern so that a reflective member reflecting light emitted from a light emitting element is omitted, thereby reducing the manufacturing process of the display device.

[0008] It should be noted that aspects of the present disclosure are not limited thereto, and other aspects not mentioned herein will be apparent to those of ordinary skill in the art from the following description.

[0009] Technical Solution

[0010] According to an embodiment of the present disclosure, a display device includes: a first electrode and a second electrode, the second electrode being separated from the first electrode; a first insulating pattern, which is arranged on the first electrode and at least partially overlaps with the first electrode, and a first side of the first insulating pattern is separated from a first end of the first electrode; a second insulating pattern, which is arranged on the second electrode and at least partially overlaps with the second electrode, and a second side of the second insulating pattern facing the first side is separated from a second end of the second electrode facing the first end; at least one concave-convex pattern, which is arranged on each of the first insulating pattern and the second insulating pattern; and at least one light-emitting element, which is arranged between the first insulating pattern and the second insulating pattern, and both ends of the light-emitting element are electrically connected to the first electrode and the second electrode, respectively.

[0011] A distance between the first insulating pattern and the second insulating pattern may be greater than a distance between the first electrode and the second electrode.

[0012] The concavo-convex pattern may have a shape in which at least a portion of a top surface of each of the first and second insulating patterns protrudes upward, wherein the concavo-convex patterns may be spaced apart from each other.

[0013] The concave portion or the convex portion of the concavo-convex pattern may have at least one outer side surface inclined with respect to a top surface of each of the first and second insulating patterns.

[0014] At least a portion of the concavo-convex pattern may be located below a reference plane that is parallel to the first electrode and passes through both ends of the light emitting element.

[0015] The concavo-convex pattern may have a curved outer surface.

[0016] The first insulating pattern may include a first hole pattern, which is separated from the first side and formed so that at least a portion of the top surface of the first insulating pattern is recessed, and the second insulating pattern may include a second hole pattern, which is separated from the second side and formed so that at least a portion of the top surface of the second insulating pattern is recessed.

[0017] The concavo-convex pattern may be disposed between the first hole pattern and the first side, and between the second hole pattern and the second side.

[0018] The display device may also include: a fourth insulating pattern disposed between the first insulating pattern and the first electrode; a fifth insulating pattern placed between the second insulating pattern and the second electrode; and a sixth insulating pattern disposed between the fourth insulating pattern and the fifth insulating pattern, and the sixth insulating pattern partially covers each of the first end of the first electrode and the second end of the second electrode.

[0019] The light emitting element may be disposed on the sixth insulating pattern.

[0020] The display device may further include: a first contact electrode disposed between the second insulating pattern and the sixth insulating pattern and contacting one end of the light emitting element; and a second contact electrode disposed between the fifth insulating pattern and the sixth insulating pattern and contacting an opposite end of the light emitting element.

[0021] The display device may further include a third insulating pattern disposed between the first insulating pattern and the second insulating pattern and disposed on at least a portion of a top surface of the light emitting element.

[0022] The display device may further include a bank spaced apart from the second end of the first electrode, the second end of the first electrode being opposite to the first end of the first electrode, wherein the first insulating pattern may be spaced apart from the bank, and the fourth insulating pattern contacts the bank.

[0023] A second side of the first insulation pattern opposite to the first side of the first insulation pattern may be located between the bank and the second end of the first electrode.

[0024] A distance between the first insulation pattern and the bank may be smaller than a distance between the first insulation pattern and the second insulation pattern.

[0025] The bank may be integrally formed with the fourth insulation pattern.

[0026] According to an embodiment of the present disclosure, a display device includes: a first electrode and a second electrode, the first electrode extending in a first direction, the second electrode extending in the first direction and separated from the first electrode; at least one light-emitting element arranged between the first electrode and the second electrode; a first insulating pattern extending in the first direction and at least partially overlapping with the first electrode; a second insulating pattern extending in the first direction and separated from the first insulating pattern and at least partially overlapping with the second electrode; and at least one concave-convex pattern arranged on each of the first insulating pattern and the second insulating pattern.

[0027] A distance between the first insulating pattern and the second insulating pattern may be greater than a distance between the first electrode and the second electrode.

[0028] A first side portion of the first insulation pattern may be horizontally spaced inwardly from one end of the first electrode, and a second side portion of the first insulation pattern opposite to the first side portion may horizontally protrude outwardly beyond an opposite end of the first electrode.

[0029] Both side portions of the second insulation pattern may be horizontally spaced inwardly from both ends of the second electrode, respectively.

[0030] At least one concavo-convex pattern may extend in one direction and be spaced apart from each other in a direction different from the one direction.

[0031] The first insulating pattern may include a first hole pattern in which at least a portion of a top surface of the first insulating pattern is recessed toward the first electrode, wherein the second insulating pattern may include a second hole pattern in which at least a portion of a top surface of the second insulating pattern is recessed toward the second electrode, and each of the first hole pattern and the second hole pattern may extend in the first direction.

[0032] The concavo-convex pattern disposed on the first insulating pattern may be disposed between the first side and the first hole pattern, and the concavo-convex pattern disposed on the second insulating pattern may be disposed between each of two opposite sides of the second insulating pattern and the second hole pattern.

[0033] According to an embodiment of the present disclosure, a method for manufacturing a display device includes: preparing a substrate on which a first electrode and a second electrode are provided, wherein the second electrode is separated from the first electrode; placing at least one light-emitting element in a space between the first electrode and the second electrode; and forming at least one insulating pattern, which is separated from the light-emitting element and at least partially overlaps with each of the first electrode and the second electrode, wherein the insulating pattern has a concave-convex pattern in which at least a portion of a top surface of the insulating pattern protrudes upward.

[0034] At least one insulating pattern may include: a first insulating pattern at least partially overlapping the first electrode; and a second insulating pattern separated from the first insulating pattern and at least partially overlapping the second electrode, wherein each of the first insulating pattern and the second insulating pattern may be separated from the light emitting element.

[0035] The concavo-convex pattern may have a shape in which at least a portion of a top surface of each of the first and second insulating patterns protrudes upward, wherein the concavo-convex patterns may be spaced apart from each other.

[0036] Forming at least one insulating pattern may include: forming an insulating material layer that completely covers the first electrode, the second electrode and the light-emitting element; and exposing two opposite ends of the light-emitting element and forming a first insulating pattern and a second insulating pattern, on which a concave-convex pattern is formed.

[0037] Forming the at least one insulating pattern may be performed using a nanoimprint process.

[0038] The method may further include forming a first contact electrode in contact with the first electrode and one end of the light emitting element and a second contact electrode in contact with the second electrode and an opposite end of the light emitting element.

[0039] Details of other implementations are included in the detailed description and accompanying drawings.

[0040] Beneficial Effects

[0041] A display device according to an embodiment includes an insulating pattern on which light emitted from a light emitting element is incident, and the insulating pattern includes a concave-convex pattern that receives light and outputs the light upward. As a result, in a display device without a separate reflective electrode or reflective bank, the concave-convex pattern can output light emitted from the side of the light emitting element in an upward direction. Therefore, its top light emission efficiency can be improved.

[0042] In addition, the method for manufacturing a display device according to an embodiment may not include the step of forming a reflective electrode or a reflective bank, and may simultaneously perform the steps of forming a concavo-convex pattern and forming an insulating pattern. Therefore, the manufacturing process of the display device may be simplified.

[0043] The effects according to the embodiments are not limited to the above-exemplified contents, and more various effects are included in the present disclosure. BRIEF DESCRIPTION OF THE DRAWINGS

[0044] Figure 1 is a plan view of a display device according to an embodiment.

[0045] Figure 2 It is along Figure 1 Cross-sectional views taken along lines IIa-IIa', IIb-IIb' and IIc-IIc'.

[0046] Figure 3 is a schematic diagram of a light emitting element according to one embodiment.

[0047] Figure 4 is a schematic diagram showing a cross section of a portion of a display device according to an embodiment.

[0048] Figure 5 yes Figure 4 An enlarged view of part A of FIG.

[0049] Figure 6 is a plan view showing a top surface of an insulation pattern according to one embodiment.

[0050] Figure 7 is a schematic diagram showing a cross section of one sub-pixel according to one embodiment.

[0051] Figure 8 is a flowchart showing a manufacturing process of a display device according to one embodiment.

[0052] Figures 9 to 16 is a cross-sectional view showing a manufacturing process of a display device according to an embodiment.

[0053] Figures 17 to 19 is a cross-sectional view showing a concavo-convex pattern according to another embodiment.

[0054] Fig. 20 and Fig.21 is a plan view showing a concavo-convex pattern according to another embodiment.

[0055] Fig. 22 is a cross-sectional view of a display device according to another embodiment.

[0056] Fig.23 and Fig.24 is a cross-sectional view of a display device according to another embodiment.

[0057] Figure 25 to Figure 27 It is shown Fig.24 sectional views of some steps of a manufacturing process of a display device.

[0058] Fig.28 is a cross-sectional view of a display device according to still another embodiment.

[0059] Fig.29 and Fig.30 is a plan view illustrating a hole pattern formed in an insulating pattern according to still another embodiment.

[0060] Fig.31 is a schematic cross-sectional view of a display device according to still another embodiment.

[0061] Fig.32 is a schematic diagram of a light emitting element according to another embodiment. DETAILED DESCRIPTION

[0062] The present invention will be described more fully below with reference to the accompanying drawings, in which preferred embodiments of the present invention are shown. However, the present invention may be implemented in different forms and should not be construed as being limited to the embodiments set forth herein. On the contrary, these embodiments are provided so that this disclosure will be thorough and complete, and will fully convey the scope of the present invention to those skilled in the art.

[0063] It will also be understood that when a layer is referred to as being 'on' another layer or substrate, it can be directly on the other layer or substrate, or intervening layers may also be present. Throughout the specification, the same reference numerals refer to the same components.

[0064] It should be understood that although the terms "first", "second", etc. may be used to describe various elements in this article, these elements should not be limited by these terms. These terms are only used to distinguish one element from another element. For example, without departing from the teachings of the present invention, the first element discussed below may be referred to as the second element. Similarly, the second element may also be referred to as the first element.

[0065] Hereinafter, embodiments will be described with reference to the accompanying drawings.

[0066] Figure 1 is a plan view of a display device according to an embodiment.

[0067] refer to Figure 1 , the display device 10 may include a plurality of pixels PX. Each of the pixels PX may include at least one light emitting element 300 that emits light of a specific wavelength band to display a specific color.

[0068] Each of the plurality of pixels PX may include a first sub-pixel PX1, a second sub-pixel PX2, and a third sub-pixel PX3. The first sub-pixel PX1 may emit light of a first color, the second sub-pixel PX2 may emit light of a second color, and the third sub-pixel PX3 may emit light of a third color. The first color may be red, the second color may be green, and the third color may be blue. The present disclosure is not limited thereto. Sub-pixels PXn (in an exemplary embodiment of the present invention, n is an integer less than or equal to 3) may emit light of the same color. In addition, Figure 1 It is shown that a single pixel PX includes three sub-pixels PXn. The present disclosure is not limited thereto. Each pixel PX may include a greater number of sub-pixels PXn.

[0069] As used herein, each of the terms "first", "second", etc. refers to each of the components, and is used to simply distinguish the components between them, and does not necessarily mean the corresponding components. That is, the components modified by each of the terms "first", "second", etc. are not necessarily limited to a specific structure or position. In some cases, additional reference numerals may be assigned thereto. Therefore, the reference numerals assigned to each component may be described based on the accompanying drawings and the following description. In addition, without departing from the spirit and scope of the present disclosure, the first element, first component, first region, first layer, or first region described below may be referred to as a second element, second component, second region, second layer, or second region.

[0070] Each sub-pixel PXn of the display device 10 may include a light-emitting region and a non-light-emitting region. The light-emitting region is defined as a region in which the light-emitting element 300 included in the display device 10 is disposed and thus outputs light of a specific wavelength band. The non-light-emitting region may refer to a region other than the light-emitting region, and may be defined as a region in which the light-emitting element 300 is not disposed and thus does not output light.

[0071] The sub-pixel PXn of the display device 10 may include a plurality of banks 400 , a plurality of electrodes 210 and 220 , a light emitting element 300 , and at least one insulating layer 600 and 700 .

[0072] The plurality of electrodes 210 and 220 may be electrically connected to the light emitting element 300. A predetermined voltage may be applied to the plurality of electrodes 210 and 220 so that the light emitting element 300 emits light. In addition, at least a portion of each of the electrodes 210 and 220 may be used to generate an electric field within the subpixel PXn to align the light emitting element 300.

[0073] The plurality of electrodes 210 and 220 may include a first electrode 210 and a second electrode 220. In an embodiment, the first electrode 210 may be used as a separate pixel electrode for each sub-pixel PXn, and the second electrode 220 may be used as a common electrode for the sub-pixel PXn. One of the first electrode 210 and the second electrode 220 may be used as an anode of the light-emitting element 300, and the other thereof may be used as a cathode of the light-emitting element 300. However, the present disclosure is not limited thereto. One of the first electrode 210 and the second electrode 220 may be used as a cathode of the light-emitting element 300, and the other thereof may be used as an anode of the light-emitting element 300.

[0074] The first and second electrodes 210 and 220 may include electrode rods 210S and 220S respectively extending in a first direction D1 and at least one first electrode branch 210B and at least one second electrode branch 220B respectively branching from the electrode rods 210S and 220S and respectively extending in a second direction D2 intersecting the first direction D1.

[0075] The first electrode 210 may include a first electrode rod 210S extending in the first direction D1 and at least one first electrode branch 210B branched from the first electrode rod 210S and extending in the second direction D2.

[0076] The first electrode rod 210S of one sub-pixel may be discontinuous at the boundary between adjacent sub-pixels PXn. In addition to being discontinuous at the boundary between adjacent sub-pixels PXn, the first electrode rod 210S may extend continuously in substantially the same straight line throughout adjacent sub-pixels belonging to the same row (sub-pixels adjacent to each other in the first direction D1). Therefore, different first electrode rods 210S disposed in different sub-pixels PXn may apply different electrical signals to different first electrode branches 210B, so that different first electrode branches 210B may be driven separately.

[0077] The first electrode branches 210B may branch from at least a portion of the first electrode rods 210S and may extend in the second direction D2 and may terminate to be spaced apart from the second electrode rods 220S, wherein the second electrode rods 220S are opposite to the first electrode rods 210S.

[0078] The second electrode 220 may include a second electrode bar 220S extending in the first direction D1 and spaced apart from and opposite to the first electrode bar 210S, and a second electrode branch 220B branching from the second electrode bar 220S and extending in the second direction D2. In this regard, the second electrode bar 220S in a single pixel PX may extend continuously throughout a plurality of sub-pixels PXn arranged in the first direction D1 without interruption at the boundary between adjacent sub-pixels. Therefore, the second electrode bar 220S may extend continuously throughout adjacent pixels PX arranged in the first direction D1 without interruption at the boundary between adjacent pixels PX.

[0079] The second electrode branch 220B may be spaced apart from the first electrode branch 210B and extend in parallel to the first electrode branch 210B, and may terminate so as to be spaced apart from the first electrode rod 210S. That is, the second electrode branch 220B may be disposed in the subpixel PXn and have one end connected to the second electrode rod 220S and an opposite end spaced apart from the first electrode rod 210S.

[0080] although Figure 1 It is shown that two second electrode branches 220B are disposed in each sub-pixel PXn and a single first electrode branch 210B is disposed between the two second electrode branches 220B, but the present disclosure is not limited thereto.

[0081] The bank 400 may be disposed at a boundary between sub-pixels PXn. As a result, the first electrode rod 210S may be discontinuous at the bank 400, and the second electrode rod 220S may extend continuously while passing through and under the bank 400. The bank 400 may extend in the second direction D2 and be disposed at a boundary between sub-pixels PXn arranged in the first direction D1. However, the present disclosure is not limited thereto. The bank 400 may be disposed at a boundary between sub-pixels PXn extending in the first direction D1 and arranged in the second direction D2.

[0082] A plurality of light emitting elements 300 may be disposed between the first electrode branch 210B and the second electrode branch 220B. Each of at least some of the plurality of light emitting elements 300 may have one end electrically connected to the first electrode branch 210B and an opposite end electrically connected to the second electrode branch 220B.

[0083] The plurality of light emitting elements 300 may be arranged in the second direction D2 and spaced from each other, and may be aligned with each other and may be substantially parallel to each other. The distance between the light emitting elements 300 is not particularly limited. In one example, the plurality of light emitting elements 300 may be spaced from each other at a constant distance. In another example, the plurality of light emitting elements 300 may be spaced from each other at an irregular distance. In yet another example, some of the plurality of light emitting elements 300 may be spaced from each other at a constant distance, while others of the plurality of light emitting elements 300 may be spaced from each other at an irregular distance.

[0084] A plurality of insulating layers 600 and 700 are provided in each sub-pixel PXn. The insulating layers 600 and 700 may include a first insulating layer 600 and a second insulating layer 700. Although not shown in the drawings, the first insulating layer 600 may be provided to cover the entire region of the sub-pixel PXn including the first electrode branch 210B and the second electrode branch 220B. The first insulating layer 600 may protect the electrodes 210 and 220 and simultaneously insulate the electrodes 210 and 220 from each other so that the electrodes 210 and 220 do not directly contact each other.

[0085] The second insulating layer 700 may be disposed on the first insulating layer 600, and at least a portion of the second insulating layer 700 may be disposed to partially overlap each of the electrode branches 210B and 220B. The second insulating layer 700 may include a plurality of insulating patterns 710, 720, and 730. The first insulating pattern 710 and the second insulating pattern 720 may be disposed to overlap the first electrode branch 210B and the second electrode branch 220B, respectively. The plurality of insulating patterns 710, 720, and 730 may extend in one direction and may be spaced apart from each other in a direction different from the one direction.

[0086] The first insulating pattern 710 may extend in the second direction D2 and may be disposed on the first electrode branch 210B. That is, the width of the first insulating pattern 710 may be less than the width of the first electrode branch 210B. The first insulating pattern 710 may extend in the direction in which the first electrode branch 210B extends and may be disposed between two contact electrodes 260 to be described later. The first insulating pattern 710 may have two opposite side portions that are respectively in contact with the two contact electrodes 260. The present disclosure is not limited thereto. The first insulating pattern 710 may have two opposite side portions that are respectively spaced apart from or overlapped with the two contact electrodes 260.

[0087] The second insulating pattern 720 may extend in the second direction D2 and may be disposed to partially overlap the second electrode branch 220B. Unlike the first insulating pattern 710, a portion of the second insulating pattern 720 may be disposed on the second electrode branch 220B, and another portion of the second insulating pattern 720 may be disposed on the first insulating layer 600. One side of the second insulating pattern 720 may be disposed to contact, be separated from, or overlap the contact electrode 260, and the other side thereof may be disposed between one side portion of the second electrode branch 220B and the embankment 400. However, the present disclosure is not limited thereto.

[0088] Although not shown in the drawings, the third insulating pattern 730 may be disposed between the first insulating pattern 710 and the second insulating pattern 720. The third insulating pattern 730 may be disposed on the plurality of light emitting elements 300 and extend in one direction (e.g., the second direction D2) in which the light emitting elements 300 are arranged. The third insulating pattern 730 may be disposed on the light emitting element 300 and extend in the second direction D2. Therefore, the third insulating pattern 730 may be disposed on the first insulating layer 600 and in the region where the light emitting element 300 is disposed. That is, the third insulating pattern 730 may be formed to substantially surround the outer face of the light emitting element 300.

[0089] The shape of each of the plurality of insulating patterns 710, 720, and 730 may be formed by placing a material constituting the second insulating layer 700 to cover the entire area of ​​each pixel PX or sub-pixel PXn and partially patterning the disposed material. However, the present disclosure is not limited thereto. The insulating patterns 710, 720, and 730 of the second insulating layer 700 may be formed in a single process.

[0090] In one example, in the display device 10 according to one embodiment, at least one of the first insulating layer 600 and the second insulating layer 700 may include a concavo-convex pattern (eg, Fig.24 The concave-convex pattern 650_3 or Figure 2 The concavo-convex pattern 750 in the first insulating layer 600 and the second insulating layer 700 may be formed in a portion of the insulating pattern of the first insulating layer 600 or the second insulating layer 700, and may be emitted toward the top of each sub-pixel PXn through the concavo-convex pattern. The insulating layers 600 and 700 and the insulating patterns 710, 720, and 730 will be described in detail below with reference to other drawings.

[0091] Each contact electrode 260 may be disposed on each of the first electrode branch 210B and the second electrode branch 220B. In this regard, a substantial portion of each contact electrode 260 may be disposed on the first insulating layer 600, and at least a portion of each contact electrode 260 may contact each of the first electrode branch 210B and the second electrode branch 220B, or may be electrically connected to each of the first electrode branch 210B and the second electrode branch 220B.

[0092] A plurality of contact electrodes 260 may extend in the second direction D2, and may be arranged in the first direction D1 and spaced apart from each other. Each contact electrode 260 may contact at least one end of the light emitting element 300, and each contact electrode 260 may be electrically connected to the first electrode 210 or the second electrode 220, and thus receive an electrical signal from the first electrode 210 or the second electrode 220. Therefore, each contact electrode 260 may transmit an electrical signal transmitted from the first electrode 210 or the second electrode 220 to the light emitting element 300.

[0093] The contact electrode 260 may include a first contact electrode 261 and a second contact electrode 262. The first contact electrode 261 may be disposed on the first electrode branch 210B and may contact one end of the light emitting element 300. The second contact electrode 262 may be disposed on the second electrode branch 220B and may contact the opposite end of the light emitting element 300.

[0094] The first electrode rod 210S and the second electrode rod 220S may be electrically connected to the circuit element layer of the display device 10 via contact holes (e.g., first electrode contact holes CNTD and second electrode contact holes CNTS), respectively. The accompanying drawings show that one second electrode contact hole CNTS is formed in the second electrode rod 220S of a plurality of sub-pixels PXn. However, the present disclosure is not limited thereto. In some cases, the second electrode contact hole CNTS may be formed for each sub-pixel PXn.

[0095] The display device 10 may further include a Figure 1 The circuit element layer below the electrodes 210 and 220 shown in FIG. Figure 2 The structure of the display device 10 is described in detail.

[0096] Figure 2 It is along Figure 1 Cross-sectional views taken along lines IIa-IIa', IIb-IIb' and IIc-IIc'.

[0097] Figure 2 A cross-sectional view of a first sub-pixel PX1 is shown. However, this cross-sectional view may be equally applicable to another pixel PX or sub-pixel PXn. Figure 2A cross section between one end and the opposite end of one light emitting element 300 is shown.

[0098] refer to Figure 1 and Figure 2 The display device 10 may include a substrate 110, a buffer layer 115, a light blocking layer 180, a first transistor 120 and a second transistor 140, and a light emitting element 300, a first insulating layer 600, a second insulating layer 700 and a plurality of electrodes 210 and 220 disposed above the first transistor 120 and the second transistor 140.

[0099] The substrate 110 may be implemented as an insulating substrate. The substrate 110 may be made of an insulating material such as glass, quartz, or polymer resin. In addition, the substrate 110 may be a rigid substrate, or may be a flexible substrate that can be bent, folded, or rolled.

[0100] The light blocking layer 180 may be disposed on the substrate 110. The light blocking layer 180 may include a first light blocking layer 181 and a second light blocking layer 182. The first light blocking layer 181 may be electrically connected to a first drain electrode 123 of a first transistor 120 to be described later. The second light blocking layer 182 may be electrically connected to a second drain electrode 143 of a second transistor 140 to be described later.

[0101] The first light blocking layer 181 and the second light blocking layer 182 may be disposed to overlap the first active material layer 126 of the first transistor 120 and the second active material layer 146 of the second transistor 140, respectively. Each of the first light blocking layer 181 and the second light blocking layer 182 may include a material that blocks light, and thus may prevent light from being incident on each of the first active material layer 126 and the second active material layer 146. In one example, each of the first light blocking layer 181 and the second light blocking layer 182 may be made of an opaque metal material that blocks light transmission.

[0102] The buffer layer 115 may be disposed on the light blocking layer 180 and the substrate 110. The buffer layer 115 may be disposed to cover the entire region of the substrate 110 on which the light blocking layer 180 is disposed. The buffer layer 115 may prevent diffusion of impurity ions, prevent intrusion of moisture or external air, and perform a surface planarization function. In addition, the buffer layer 115 may insulate the light blocking layer 180 from the first active material layer 126 and the second active material layer 146 from each other.

[0103] A semiconductor layer may be disposed on the buffer layer 115. The semiconductor layer may include a first active material layer 126 of the first transistor 120, a second active material layer 146 of the second transistor 140, and an auxiliary material layer 163. The semiconductor layer may include polycrystalline silicon, single crystal silicon, oxide semiconductor, etc.

[0104] The first gate insulating film 170 may be disposed on the semiconductor layer. The first gate insulating film 170 may be disposed to cover the entire region of the buffer layer 115 on which the semiconductor layer is disposed. The first gate insulating film 170 may be used as a gate insulating film of each of the first transistor 120 and the second transistor 140.

[0105] A first conductive layer may be disposed on the first gate insulating film 170. The first conductive layer may include a first gate electrode 121 disposed on the first active material layer 126 of the first transistor 120 on the first gate insulating film 170, a second gate electrode 141 disposed on the second active material layer 146 of the second transistor 140, and a power line 161 disposed on the auxiliary material layer 163.

[0106] An interlayer insulating film 190 may be disposed on the first conductive layer. The interlayer insulating film 190 may perform an interlayer insulating function. In addition, the interlayer insulating film 190 may include an organic insulating material and may perform a surface planarization function.

[0107] A second conductive layer may be disposed on the interlayer insulating film 190 , and may include the first drain electrode 123 and the first source electrode 124 of the first transistor 120 , the second drain electrode 143 and the second source electrode 144 of the second transistor 140 , and the power electrode 162 disposed on the power line 161 .

[0108] Each of the first drain electrode 123 and the first source electrode 124 may be electrically connected to the first active material layer 126 via a first contact hole extending through the interlayer insulating film 190 and the first gate insulating film 170. Each of the second drain electrode 143 and the second source electrode 144 may be electrically connected to the second active material layer 146 via a second contact hole extending through the interlayer insulating film 190 and the first gate insulating film 170. In addition, the first drain electrode 123 and the second drain electrode 143 may be electrically connected to the first light blocking layer 181 and the second light blocking layer 182, respectively, via additional contact holes.

[0109] The second conductive layer may be provided with a via layer 200. The via layer 200 may include an organic insulating material and perform a surface planarization function.

[0110] The bank 400 and the plurality of electrodes 210 and 220 are disposed on the via layer 200. The bank 400 may be disposed at a boundary between the sub-pixels PXn so that the sub-pixels PXn are spaced apart from each other.

[0111] The bank 400 may define a boundary between the sub-pixels PXn. The bank 400 may extend in the first direction D1 and the second direction D2 to form a grid pattern, and may be disposed at a boundary between the sub-pixels PXn. When an organic material or a solvent is ejected using an inkjet printing method in manufacturing the display device 10, the bank 400 may perform a function of preventing the organic material or the solvent from flowing between the sub-pixels PXn. Alternatively, when the display device 10 further includes another member, the other member may be disposed on the bank 400 so that the bank 400 may support the other member. The bank 400 may include polyimide.

[0112] However, the present disclosure is not limited thereto. The bank 400 may not necessarily be disposed on the via layer 200. The bank 400 and the insulating layers 600 and 700 may be formed in a single process. In this case, the bank 400 may be integrally formed with the insulating layers 600 and 700 and may have a partially protruding shape.

[0113] A plurality of electrodes 210 and 220 may be disposed on the via layer 200. As described above, each of the electrodes 210 and 220 includes a corresponding one of the electrode rods 210S and 220S and a corresponding one of the electrode branches 210B and 220B. Figure 1 The line IIa-IIa' in FIG. 1 extends across the first electrode rod 210S, Figure 1 The line IIb-IIb′ in FIG. 1 extends across the first electrode branch 210B and the second electrode branch 220B, and Figure 1 The line IIc-IIc′ in FIG. 2 extends across the second electrode rod 220S. A corresponding one of the electrode rods 210S and 220S and a corresponding one of the electrode branches 210B and 220B may constitute a corresponding one of the first electrode 210 and the second electrode 220 .

[0114] At least a portion of the first electrode rod 210S may overlap the bank 400. As described above, the first electrode rod 210S extends in the first direction D1 and is interrupted at the bank 400. One end of the first electrode rod 210S of the sub-pixel PXn may overlap the bank 400, and its opposite end may be spaced apart from another bank 400. One end of the first electrode rod 210S overlapping the bank 400 may be connected to the first drain electrode 123 via the first electrode contact hole CNTD extending through the through-hole layer 200 and exposing a portion of the first drain electrode 123 of the first transistor (driving transistor) 120. The first electrode rod 210S may be electrically connected to the first drain electrode 123 of the driving transistor 120, and may receive a predetermined electrical signal from the first drain electrode 123.

[0115] The first electrode branch 210B and the second electrode branch 220B may be spaced apart from each other. The first electrode branch 210B and the second electrode branch 220B are disposed in the middle region of each subpixel PXn and spaced apart from each other in the first direction D1. A plurality of light emitting elements 300 may be disposed in the space between the first electrode branch 210B and the second electrode branch 220B.

[0116] The second electrode rod 220S may extend in one direction and also extend into a non-light emitting region where the light emitting element 300 is not disposed. The second electrode rod 220S may contact the power electrode 162 via a second electrode contact hole CNTS extending through the through-hole layer 200 and exposing a portion of the power electrode 162. The second electrode rod 220S may be electrically connected to the power electrode 162 and may receive a predetermined electrical signal from the power electrode 162.

[0117] Each of the electrodes 210 and 220 may include a transparent conductive material. In one example, each of the electrodes 210 and 220 may include materials such as ITO (indium tin oxide), IZO (indium zinc oxide), ITZO (indium tin zinc oxide). The present disclosure is not limited to this. In some embodiments, each of the electrodes 210 and 220 may include a conductive material with high reflectivity. For example, each of the electrodes 210 and 220 may include metals such as silver (Ag), copper (Cu), aluminum (Al) as a conductive material with high reflectivity. In this case, light incident on each of the electrodes 210 and 220 may be reflected from the electrodes 210 and 220 and emitted toward the top of each sub-pixel PXn.

[0118] In addition, each of the electrodes 210 and 220 may have a structure in which at least one transparent conductive material layer and at least one metal layer having high reflectivity are vertically stacked, or may be composed of a single layer including a transparent conductive material and a metal having high reflectivity. In an embodiment, each of the electrodes 210 and 220 may have a stacked structure of ITO / silver (Ag) / ITO / IZO, or may include an alloy including aluminum (Al), nickel (Ni), lanthanum (La), etc. However, the present disclosure is not limited thereto.

[0119] The first insulating layer 600 may be provided to partially cover each of the first electrode 210 and the second electrode 220. The first insulating layer 600 may be provided to cover a substantial portion of the top surface of each of the first electrode 210 and the second electrode 220, but to expose a portion of each of the first electrode 210 and the second electrode 220. The first insulating layer 600 may include a patterned portion 600P that exposes a portion of each of the ends of the electrode branches 210B and 220B facing each other. Therefore, the first insulating layer 600 may be interrupted at the patterned portion 600P. The contact electrode 260 may be provided in the patterned portion 600P so that the contact electrode 260 may contact the electrodes 210 and 220. In addition, the first insulating layer 600 may be partially provided in the region between the second electrode branch 220B and the bank 400. The portion of the first insulating layer 600 provided in the region between the first electrode branch 210B and the second electrode branch 220B may extend in the second direction D2 and thus have an island shape or a linear shape.

[0120] The first insulating layer 600 can protect the first electrode 210 and the second electrode 220, and at the same time insulate the two from each other. In addition, the first insulating layer 600 can prevent the light-emitting element 300 disposed on the first insulating layer 600 from directly contacting other components and being damaged by other components. However, the shape and structure of the first insulating layer 600 are not limited thereto. In some cases, the first insulating layer 600 may have an insulating pattern on which a concave-convex pattern is formed. For example, when the second insulating layer 700 is omitted, the first insulating layer 600 may include an insulating pattern to be described later (refer to Fig.24 The insulating patterns 610_3, 620_3 and 630_3 shown in FIG. 1 and the concave-convex patterns (refer to FIG. 1 ) are shown in FIG. Fig.24 The concavo-convex pattern 650_3 shown in FIG. 3 may be formed on the insulating pattern. In this case, light emitted from the light emitting element 300 may be incident on the first insulating layer 600, and may then be emitted toward the top of the sub-pixel PXn through the concavo-convex pattern of the first insulating layer 600. This will be described in detail later with reference to other drawings.

[0121] The light emitting element 300 may be disposed on the first insulating layer 600. At least one light emitting element 300 may be disposed on a portion of the first insulating layer 600 disposed between the electrode branches 210B and 220B. Two opposite ends of the light emitting element 300 may be aligned with two opposite ends of the first insulating layer 600 below, respectively. The light emitting element 300 may partially overlap the electrodes 210 and 220. The light emitting element 300 may overlap each of the ends of the first electrode branch 210B and the second electrode branch 220B facing each other, and may be electrically connected to each of the electrodes 210 and 220 via the contact electrode 260.

[0122] In one example, the light emitting element 300 may include a plurality of layers arranged in a direction parallel to the through hole layer 200. The light emitting element 300 of the display device 10 according to one embodiment may include a semiconductor layer (having the conductivity type as described above) and an active layer which may be sequentially arranged in a direction parallel to the through hole layer 200. As shown in the drawings, for example, referring to Figure 2 and Figure 3 , the light emitting element 300 may include a first conductive semiconductor 310, an active layer 330, a second conductive semiconductor 320, and a conductive electrode layer 370 which may be sequentially arranged in a direction parallel to the through-hole layer 200. The present disclosure is not limited thereto. The order in which the multiple layers of the light emitting element 300 are arranged may be vice versa. In some cases, when the light emitting element 300 has a structure different from the above structure, the multiple layers may be arranged in a direction perpendicular to the through-hole layer 200.

[0123] The second insulating layer 700 may be partially disposed on the first insulating layer 600 and the light emitting element 300. The second insulating layer 700 may include a first insulating pattern 710, a second insulating pattern 720, and a third insulating pattern 730 as a plurality of insulating patterns. The first insulating pattern 710 and the second insulating pattern 720 may be disposed to overlap the first electrode branch 210B and the second electrode branch 220B, respectively, and the third insulating pattern 730 may be disposed on the light emitting element 300.

[0124] The third insulating pattern 730 may protect the light emitting element 300 and simultaneously perform a function of fixing the light emitting element 300 in the manufacturing process of the display device 10. The third insulating pattern 730 may be disposed to partially surround the outer face of the light emitting element 300. That is, a portion of the material of the third insulating pattern 730 may be disposed between the outer face of the light emitting element 300 and the first insulating layer 600. The third insulating pattern 730 may extend in the second direction D2 and between the first electrode branch 210B and the second electrode branch 220B, and thus may have an island shape or a linear shape in a plan view.

[0125] The first insulating pattern 710 and the second insulating pattern 720 are disposed on the first insulating layer 600. The first insulating pattern 710 and the second insulating pattern 720 may be spaced apart from the patterned portion 600P of the first insulating layer 600. That is, each of the sides of the first insulating pattern 710 and the second insulating pattern 720 facing each other may be disposed on the first insulating layer 600 and may be spaced apart horizontally from the patterned portion 600P. In one example, the accompanying drawings show that each of the sides of the first insulating pattern 710 and the second insulating pattern 720 facing each other is inclined at a predetermined angle. The present disclosure is not limited thereto. Each of the sides of the first insulating pattern 710 and the second insulating pattern 720 facing each other may extend perpendicularly to the top surface of the first insulating layer 600.

[0126] In one embodiment, the first insulating pattern 710 and the second insulating pattern 720 may overlap the electrodes 210 and 220 or the electrode branches 210B and 220B, respectively. At least one side of each of the first insulating pattern 710 and the second insulating pattern 720 may vertically overlap each of the electrode branches 210B and 220B, and may be horizontally spaced apart from a corresponding side of each of the electrode branches 210B and 220B.

[0127] The first insulating pattern 710 may overlap with the first electrode branch 210B. Two opposite sides of the first insulating pattern 710 may overlap with the first electrode branch 210B and may be horizontally spaced apart from two opposite sides of the first electrode branch 210B, respectively. Although not shown in the drawings, the opposite sides of the first insulating pattern 710 may overlap with the first electrode branch 210B and may be horizontally spaced apart from the opposite sides of the first electrode branch 210B. Therefore, the two opposite sides of the first insulating pattern 710 may be spaced apart from the light emitting element 300. Optionally, the two opposite sides of the first insulating pattern 710 may be aligned with the two opposite sides of the first electrode branch 210B, respectively.

[0128] The second insulating pattern 720 may overlap the second electrode branch 220B. One side of the second insulating pattern 720 may overlap the second electrode branch 220B and be horizontally spaced apart from one side of the second electrode branch 220B. Therefore, one side of the second insulating pattern 720 may be spaced apart from the light emitting element 300. However, the opposite side of the second insulating pattern 720 may be located between the opposite side of the second electrode branch 220B and the embankment 400. That is, only a portion of the second insulating pattern 720 may overlap the second electrode branch 220B, while the entirety of the first insulating pattern 710 may overlap the first electrode branch 210B.

[0129] According to one embodiment, the second insulating layer 700 may include a plurality of concave-convex patterns 750 respectively disposed on the first insulating pattern 710 and the second insulating pattern 720. The concave-convex pattern 750 may have a shape in which the top surface of each of the first insulating pattern 710 and the second insulating pattern 720 partially protrudes upward. The plurality of concave-convex patterns 750 may be spaced apart from each other. The light emitted from the light emitting element 300 may travel without directionality. At least some of the light beams may travel in the direction in which the light emitting element 300 extends (ie, in a direction parallel to the top surface of the through-hole layer 200). As described above, the first insulating pattern 710 and the second insulating pattern 720 may be spaced apart from the light emitting element 300 and face the light emitting element 300. Therefore, a portion of the light emitted from the light emitting element 300 may be incident on the first insulating pattern 710 and the second insulating pattern 720 (ie, on the second insulating layer 700).

[0130] In an embodiment, the second insulating layer 700 and the first insulating layer 600 may include materials having different refractive indexes. Light incident to the second insulating layer 700 may be reflected from an interface between a flat bottom surface of the second insulating layer 700 and a flat top surface of the first insulating layer 600, and may then be emitted toward the concave-convex pattern 750 and then output from the concave-convex pattern 750. The concave-convex pattern 750 may be formed by patterning the top surface of the second insulating layer 700 during a process of forming the second insulating layer 700 or performing a nanoimprint method on the top surface of the second insulating layer 700. In one example, the vertical dimension measured from the via layer 200 to the top surface of the third insulating pattern 730 may be approximated to an average value of the vertical dimension measured from the via layer 200 to the top surface of the first insulating pattern 710 or the second insulating pattern 720 and the vertical dimension measured from the via layer 200 to the top surface of the concave-convex pattern 750. That is, a vertical dimension measured from the via layer 200 to the top surface of the third insulation pattern 730 may be greater than a vertical dimension measured from the via layer 200 to the top surface of the first insulation pattern 710 or the second insulation pattern 720, but may be smaller than a vertical dimension measured from the via layer 200 to the top surface of the concavo-convex pattern 750. The present disclosure is not limited thereto.

[0131] The accompanying drawings show that the concave-convex pattern 750 has five convex portions on each of the first insulating pattern 710 and the second insulating pattern 720. The present disclosure is not limited thereto. The concave-convex pattern 750 may be formed on the entire area of ​​the top surface of each of the first insulating pattern 710 and the second insulating pattern 720. In some cases, the concave-convex pattern 750 may be formed on a portion of the top surface of each of the first insulating pattern 710 and the second insulating pattern 720 that is separated from two opposite sides of each of the first insulating pattern 710 and the second insulating pattern 720. In addition, the shape of the convex or concave portion of the concave-convex pattern 750 is not limited to a rectangular shape. The convex or concave portion of the concave-convex pattern 750 may have various shapes. It will be described in detail later with reference to other drawings.

[0132] The contact electrode 260 may be disposed on each of the electrodes 210 and 220, the first insulating layer 600, and the second insulating layer 700. The first contact electrode 261 and the second contact electrode 262 may be disposed on the third insulating pattern 730 of the second insulating layer 700 and spaced apart from each other. Thus, the second insulating layer 700 may insulate the first contact electrode 261 and the second contact electrode 262 from each other.

[0133] In an embodiment, the first contact electrode 261 may contact a portion of the first electrode 210 exposed by the patterned portion 600P of the first insulating layer 600 and one end of the light emitting element 300. The second contact electrode 262 may contact a portion of the second electrode 220 exposed by the patterned portion 600P and an opposite end of the light emitting element 300. The first contact electrode 261 and the second contact electrode 262 may contact two opposite side end surfaces of the light emitting element 300, for example, the first conductive type semiconductor 310, the second conductive type semiconductor 320, or the conductive electrode layer 370, respectively. Two opposite sides of the first insulating layer 600 disposed between the first electrode branch 210B and the second electrode branch 220B and corresponding to the patterned portion 600P may be aligned with two opposite side ends of the light emitting element 300, respectively. Therefore, the contact electrode 260 may smoothly contact two opposite side ends of the light emitting element 300.

[0134] In addition, the first contact electrode 261 and the second contact electrode 262 may contact the first insulating pattern 710 and the second insulating pattern 720 provided on the first insulating layer 600, respectively. The first contact electrode 261 and the second contact electrode 262 may be respectively provided on two portions of the first insulating layer 600 adjacent to the patterned portion 600P and facing each other, and may extend toward the first insulating pattern 710 and the second insulating pattern 720. The accompanying drawings show that the lower ends of the first contact electrode 261 and the second contact electrode 262 extend to the first insulating pattern 710 and the second insulating pattern 720, respectively, and contact the first insulating pattern 710 and the second insulating pattern 720. However, the present disclosure is not limited thereto. The first contact electrode 261 and the second contact electrode 262 may be spaced apart from the first insulating pattern 710 and the second insulating pattern 720, respectively, or may partially and vertically overlap with the first insulating pattern 710 and the second insulating pattern 720, respectively.

[0135] The contact electrode 260 may include a conductive material. Examples of the conductive material may include ITO, IZO, ITZO, aluminum (Al), etc. However, the present disclosure is not limited thereto.

[0136] The passivation layer 800 may be disposed on the bank 400, the first insulating layer 600, the second insulating layer 700, and the contact electrode 260. The passivation layer 800 may serve to protect members disposed on the via layer 200 from an external environment.

[0137] Each of the first insulating layer 600, the second insulating layer 700, and the passivation layer 800 as described above may include an inorganic insulating material or an organic insulating material. In an embodiment, each of the first insulating layer 600, the second insulating layer 700, and the passivation layer 800 may include a silicon oxide (SiO x ), silicon nitride (SiN x ), silicon oxynitride (SiO x N y ), aluminum oxide (Al 2 O 3 ), aluminum nitride (AlN), etc. Optionally, each of the first insulating layer 600, the second insulating layer 700, and the passivation layer 800 may include an organic insulating material, and the organic insulating material includes acrylic resin, epoxy resin, phenolic resin, polyamide resin, polyimide resin, unsaturated polyester resin, polystyrene resin, polyphenylene sulfide resin, benzocyclobutene, Cardo resin, siloxane resin, silsesquioxane resin, polymethyl methacrylate, polycarbonate, polymethyl methacrylate-polycarbonate synthetic resin, etc. However, the present disclosure is not limited thereto.

[0138] Figure 3 is a schematic diagram of a light emitting element according to one embodiment.

[0139] The light emitting element 300 may be a light emitting diode. Specifically, the light emitting element 300 may be implemented as an inorganic light emitting diode made of an inorganic material and having a size of nanometer to micrometer. The light emitting element 300 may be arranged between two electrodes facing each other. When an electric field of a specific orientation is generated between the two electrodes and each of the two electrodes is polarized, the light emitting element 300 may be aligned in the same orientation between them.

[0140] The light emitting element 300 may have a shape extending in one direction. The light emitting element 300 may have a shape such as a nanorod, a nanowire, or a nanotube. In an embodiment, the light emitting element 300 may be cylindrical or rod-shaped. However, the shape of the light emitting element 300 is not limited thereto. The light emitting element 300 may have various shapes. In another example, the light emitting element 300 may have a shape of a polygonal prism such as a cube, a cuboid, or a hexagonal prism. A plurality of semiconductors included in the light emitting element 300 to be described later may be arranged or stacked in sequence in the one direction.

[0141] The light emitting element 300 may include a semiconductor crystal doped with impurities of any conductivity type (eg, p-type or n-type). The semiconductor crystal may receive an electrical signal applied from an external power source and emit light in a specific wavelength band using the electrical signal.

[0142] The light emitting element 300 according to one embodiment may emit light of a specific wavelength band. In an embodiment, the light emitted from the active layer 330 may be blue light having a central wavelength band in the range of 450nm to 495nm. However, it should be understood that the central wavelength band of blue light is not limited to the above range, and includes all wavelength ranges in which light can be identified as blue light in the art. In addition, the light emitted from the active layer 330 of the light emitting element 300 is not limited thereto. The light emitted from the active layer 330 of the light emitting element 300 may be green light having a central wavelength band in the range of 495nm to 570nm or red light having a central wavelength band in the range of 620nm to 750nm.

[0143] In one example, the light emitting element 300 according to one embodiment may include a first conductive type semiconductor 310, a second conductive type semiconductor 320, an active layer 330, and an insulating film 380. In addition, the light emitting element 300 according to one embodiment may further include at least one conductive electrode layer 370. Figure 3The light emitting element 300 is shown to further include a conductive electrode layer 370. The present disclosure is not limited thereto. In some cases, the light emitting element 300 may include a greater number of conductive electrode layers 370, or may not have a conductive electrode layer 370. The following description of the light emitting element 300 may also apply to the case where the number of conductive electrode layers 370 varies or the light emitting element 300 further includes another component.

[0144] refer to Figure 3 The first conductive type semiconductor 310 may be, for example, an n-type semiconductor. The first conductive type semiconductor 310 may include Al x Ga y In 1-x-y N (0≤x≤1, 0≤y≤1, 0≤x+y≤1) semiconductor material. For example, the first conductive semiconductor 310 may be made of at least one of AlGaInN, GaN, AlGaN, InGaN, AlN and InN, and may be doped with an n-type dopant. The n-type dopant doped into the first conductive semiconductor 310 may be Si, Ge, Sn, Se, etc. In an embodiment, the first conductive semiconductor 310 may be n-GaN doped with n-type Si. The length of the first conductive semiconductor 310 may be in the range of 1.5μm to 5μm. The present disclosure is not limited thereto.

[0145] The second conductive semiconductor 320 may be disposed on the active layer 330 to be described later. The second conductive semiconductor 320 may be, for example, a p-type semiconductor. In one example, when the light emitting element 300 emits light of a blue or green wavelength band, the second conductive semiconductor 320 may include Al x Ga y In 1-x-y N (0≤x≤1, 0≤y≤1, 0≤x+y≤1) semiconductor material. For example, the second conductive semiconductor 320 may be made of at least one of AlGaInN, GaN, AlGaN, InGaN, AlN and InN, and may be doped with a p-type dopant. The p-type dopant doped into the second conductive semiconductor 320 may be Mg, Zn, Ca, Ba, etc. In an embodiment, the second conductive semiconductor 320 may be p-GaN doped with p-type Mg. The length of the second conductive semiconductor 320 may be in the range of 0.08μm to 0.25μm. The present disclosure is not limited thereto.

[0146] In one example, the drawings show that each of the first conductive semiconductor 310 and the second conductive semiconductor 320 is composed of a single layer. The present disclosure is not limited thereto. In some cases, based on the material of the active layer 330, each of the first conductive semiconductor 310 and the second conductive semiconductor 320 may include a greater number of layers, for example, a cladding layer or a TSBR (tensile strain barrier reduction) layer.

[0147] The active layer 330 may be disposed between the first conductive semiconductor 310 and the second conductive semiconductor 320. The active layer 330 may include a material of a single quantum well structure or a multi-quantum well structure. When the active layer 330 includes a material of a multi-quantum well structure, the active layer 330 may have a structure in which a plurality of quantum layers and a plurality of well layers are alternately stacked with each other. According to an electrical signal applied through the first conductive semiconductor 310 and the second conductive semiconductor 320, the active layer 330 may emit light via a combination between electrons and holes. In one example, when the active layer 330 emits light of a blue wavelength band, the active layer 330 may include materials such as AlGaN and AlGaInN. Specifically, when the active layer 330 has a structure in which a plurality of quantum layers and a plurality of well layers are alternately stacked with each other, the quantum layer may include a material such as AlGaN or AlGaInN, and the well layer may include a material such as GaN or AlInN. In an embodiment, when the active layer 330 includes AlGaInN as a material of a quantum layer and AlInN as a material of a well layer, as described above, the active layer 330 may emit blue light having a central wavelength band within a range of 450 nm to 495 nm.

[0148] However, the present disclosure is not limited thereto. The active layer 330 may have a structure in which a plurality of first layers made of a semiconductor material having a larger bandgap energy and a plurality of second layers made of a semiconductor material having a smaller bandgap energy are alternately stacked with each other. According to the wavelength band of the emitted light, the active layer 330 may include Group III to Group V semiconductor materials. The light emitted from the active layer 330 is not limited to light of a wavelength band corresponding to blue. In some cases, the light emitted from the active layer 330 may be light of a wavelength band corresponding to red or green. The length of the active layer 330 may be in the range of 0.05 μm to 0.25 μm. The present disclosure is not limited thereto.

[0149] In one example, light emitted from the active layer 330 may be emitted not only from the outer face in the length direction of the light emitting element 300 but also from two opposite side end faces of the light emitting element 300. Directivity of light emitted from the active layer 330 is not limited to one direction.

[0150] The conductive electrode layer 370 may be an ohmic contact electrode. The present disclosure is not limited thereto. The conductive electrode layer 370 may be a Schottky contact electrode. The conductive electrode layer 370 may include a conductive metal. For example, the conductive electrode layer 370 may include at least one of aluminum (Al), titanium (Ti), indium (In), gold (Au), silver (Ag), ITO (indium tin oxide), IZO (indium zinc oxide), and ITZO (indium tin zinc oxide). In addition, the conductive electrode layer 370 may include a semiconductor material doped with an n-type or p-type dopant. The conductive electrode layer 370 may include the same material or different materials. The present disclosure is not limited thereto.

[0151] As described above, the insulating film 380 may be provided to surround the outer face of the plurality of semiconductors. In an embodiment, the insulating film 380 may be provided to surround at least the outer face of the active layer 330, and may extend in one direction in which the light emitting element 300 extends. The insulating film 380 may perform the function of protecting the member. In one example, the insulating film 380 may be formed to surround the side of the member so that two opposite ends in the length direction of the light emitting element 300 may be exposed.

[0152] The drawings show that the insulating film 380 extends in the length direction of the light emitting element 300 and covers the region from the first conductive type semiconductor 310 to the conductive electrode layer 370. The present disclosure is not limited thereto. The insulating film 380 may cover only the outer surface of one of the conductive type semiconductors and the outer surface of the active layer 330, or may cover only a portion of the outer surface of the conductive electrode layer 370 so that another portion of the outer surface of the conductive electrode layer 370 may be exposed.

[0153] The thickness of the insulating film 380 may be in the range of 10 nm to 1.0 μm. The present disclosure is not limited thereto. Preferably, the thickness of the insulating film 380 may be 40 nm.

[0154] The insulating film 380 may include a material having an insulating capability, for example, silicon oxide (SiO x ), silicon nitride (SiN x ), silicon oxynitride (SiO x N y ), aluminum nitride (AlN), aluminum oxide (Al 2 O 3 ) etc. Therefore, the insulating film 380 can prevent an electrical short circuit that may occur when the active layer 330 is in direct contact with an electrode through which an electrical signal is transmitted to the light emitting element 300. In addition, the insulating film 380 protects the outer surface of the light emitting element 300 including the active layer 330, so that a reduction in light emitting efficiency can be prevented.

[0155] In addition, in some embodiments, the insulating film 380 may be surface-treated. During the manufacturing process of the display device 10, the light-emitting elements 300 may be ejected onto the electrodes while being dispersed in a predetermined ink, and may be aligned with each other. At this point, in order to maintain a state in which the light-emitting elements 300 are not aggregated with other adjacent light-emitting elements 300 in the ink but the light-emitting elements 300 are dispersed in the ink, the insulating film 380 may have a hydrophobic or hydrophilic surface.

[0156] In one example, the light emitting element 300 may have a length h of 1 μm to 10 μm or 2 μm to 6 μm, and preferably has a length h of 4 μm to 5 μm. In addition, the diameter of the light emitting element 300 may be in the range of 300 nm to 700 nm, and the aspect ratio of the light emitting element 300 may be in the range of 1.2 to 100. The present disclosure is not limited thereto. The plurality of light emitting elements 300 included in the display device 10 may have different diameters due to differences between the compositions of their active layers 330. Preferably, the diameter of the light emitting element 300 may be about 500 nm.

[0157] Figure 4 is a schematic diagram showing a cross section of a portion of a display device according to an embodiment. Figure 5 yes Figure 4 An enlarged view of part A of FIG. Figure 6 is a plan view showing a top surface of an insulation pattern according to one embodiment.

[0158] exist Figure 4 In order to illustrate the progress of light emitted from the light emitting element 300 into the second insulating layer 700, some components of the display device 10 are omitted or briefly illustrated. Figure 4 Only the through hole layer 200, the first electrode 210, the second electrode 220, the first insulating layer 600, the light emitting element 300, the second insulating layer 700 and the contact electrode 260 are shown, but the structure of the display device 10 is not limited thereto. The display device 10 may include the above reference Figure 2 Hereinafter, reference will be made to the components including Figure 4 The other drawings of FIG. 1 describe the insulating layers 600 and 700 of the display device 10 in detail.

[0159] refer to Figures 4 to 6, at least a portion of the light emitted from the light emitting element 300 may be incident on the second insulating layer 700. The light may be incident on one side 710S of the first insulating pattern 710 and one side 720S of the second insulating pattern 720. The second insulating layer 700 may include an inorganic material or an organic insulating material having a predetermined refractive index. Light beams incident on the first insulating pattern 710 and the second insulating pattern 720 may be refracted on one side 710S and 720S, respectively, and travel in the first insulating pattern 710 and the second insulating pattern 720, respectively.

[0160] like Figure 2 As shown in , each of the first insulating pattern 710 and the second insulating pattern 720 may include a top surface and a bottom surface, the top surface forms an interface with the passivation layer 800 disposed thereon, and the bottom surface forms an interface with the first insulating layer 600 below. Light incident to the first insulating pattern 710 and the second insulating pattern 720 may be reflected or refracted on the top surface and the bottom surface of each of the insulating patterns 710 and 720, where an interface is formed between layers having different refractive indexes at the top surface and the bottom surface. The light beam reflected from the interface may not be output from the insulating patterns 710 and 720, so that the light efficiency of the display device 10 may be reduced.

[0161] According to one embodiment, the second insulating layer 700 may include a concavo-convex pattern 750 disposed on each of the insulating patterns 710 and 720, and thus provide an optical path through which light incident to the second insulating layer 700 is output. The light may be reflected and travel in the second insulating layer 700, and may then be output from the second insulating layer 700 through the concavo-convex pattern 750 ( Figure 4 EL in). The concavo-convex pattern 750 has a shape in which a portion of the top surface of the second insulating layer 700 protrudes upward. The protruding area can change the incident angle at which light is incident toward the top surface of the second insulating layer 700 in a total reflection manner. Light incident on the concavo-convex pattern 750 may be refracted at an interface between the concavo-convex pattern 750 and the outside thereof, and then may be output from the concavo-convex pattern 750. The second insulating layer 700 may provide a traveling path for incident light and output light through the concavo-convex pattern 750 at the same time, so that the light efficiency of the display device 10 may be improved.

[0162] The concavo-convex pattern 750 is substantially integrated with the second insulating layer 700. The concavo-convex pattern 750 may be formed by patterning the top surface of the second insulating layer 700 or pressing the top surface with a mold in a process of forming the second insulating layer 700. The present disclosure is not limited thereto.

[0163] Figure 4It is shown that the side of the concave-convex pattern 750 extends in a direction perpendicular to the top surface of the second insulating layer 700 or the first insulating pattern 710, and the top surface of the concave-convex pattern 750 extends in a manner parallel to the top surface of the first insulating pattern 710. That is, the concave or convex portion of the concave-convex pattern 750 may have a quadrilateral shape with right-angle corners. However, the present disclosure is not limited thereto. One side of the concave or convex portion of the concave-convex pattern 750 may be inclined, or the concave or convex portion of the concave-convex pattern 750 may have a partially curved shape.

[0164] According to one embodiment, the concavo-convex pattern 750 may have a shape in which at least a portion thereof extends in one direction. Figure 6 As shown in , the concavo-convex pattern 750 may be formed on the top surface of the second insulating layer 700, and may be patterned to extend in a direction substantially the same as the direction in which the first insulating pattern 710 and the second insulating pattern 720 extend. In one example, the concavo-convex pattern 750 may be disposed on the first insulating pattern 710 and the second insulating pattern 720, and may extend in a manner parallel to one direction (e.g., the second direction D2) in which the insulating patterns 710 and 720 extend. However, the present disclosure is not limited thereto. The concavo-convex pattern 750 may extend in a direction different from one direction in which the insulating patterns 710 and 720 extend, or the concavo-convex pattern 750 may be divided into repeating units that may be separated from each other.

[0165] In one example, each of the plurality of concavo-convex patterns 750 may have a predetermined vertical dimension or depth Gd or a predetermined pitch Gp. The depth Gd and the pitch Gp of the concavo-convex pattern 750 may vary based on the refractive index of the material constituting the second insulating layer 700 and the wavelength of light incident to the concavo-convex pattern 750. In an embodiment, each of the pitch Gp and the depth Gd of the concavo-convex pattern 750 may be inversely proportional to the refractive index of the material of the second insulating layer 700 and may be proportional to the wavelength of the incident light. That is, when the refractive index of the material of the second insulating layer 700 is larger or the wavelength of the incident light is smaller, each of the pitch Gp and the depth Gd of the concavo-convex pattern 750 may be smaller. Therefore, the concavo-convex pattern 750 may be dense on the second insulating layer 700. On the contrary, when the refractive index of the second insulating layer 700 is smaller or the wavelength of the light is larger, each of the pitch Gp and the depth Gd of the concavo-convex pattern 750 may be larger.

[0166] Figure 7 is a schematic diagram showing a cross section of one sub-pixel according to one embodiment.

[0167] exist Figure 7In order to illustrate a structure in which the first insulating pattern 710 and the second insulating pattern 720 of the second insulating layer 700 are arranged in each sub-pixel PXn, some components of the display device 10 are omitted or illustrated in a simpler manner. Figure 7 Only the via layer 200, the first electrode 210, the second electrode 220, the bank 400, the first insulating layer 600, and the second insulating layer 700 are shown. However, the structure of the display device 10 is not limited thereto.

[0168] refer to Figure 7 , each sub-pixel PXn includes a bank 400, a first electrode 210, a second electrode 220, a first insulating layer 600, and a second insulating layer 700. One sub-pixel PXn may include one first electrode branch 210B and two second electrode branches 220B, and may include one first insulating pattern 710 and two second insulating patterns 720 respectively overlapping one first electrode branch 210B and two second electrode branches 220B.

[0169] The first electrode branch 210B and the second electrode branch 220B disposed in each subpixel PXn may have the same width. The width LE1 of the first electrode branch 210B is the same as the width LE2 of the second electrode branch 220B. On the contrary, in an embodiment, the width LI1 of the first insulating pattern 710 may be less than the width LI2 of the second insulating pattern 720. As described above, the insulating patterns 710 and 720 may overlap with the electrode branches 210B and 220B, respectively, and at least one side of each of the insulating patterns 710 and 720 may overlap with a corresponding one of the electrode branches 210B and 220B, but may be horizontally spaced apart from one side of each of the electrode branches 210B and 220B. Therefore, one side of each of the first insulating pattern 710 and the second insulating pattern 720 may be spaced apart from the light emitting element 300 disposed between the electrode branches 210B and 220B.

[0170] Unlike the second electrode branch 220B, the first electrode branch 210B may have two opposite sides that are horizontally spaced apart from the two opposite sides of the second electrode branch 220B, respectively. One side of the second electrode branch 220B may face the first electrode branch 210B, and the opposite side of the second electrode branch 220B may face the embankment 400. Therefore, the two opposite sides of the first insulating pattern 710 may overlap with the first electrode branch 210B, but may be horizontally spaced apart from the two opposite sides of the first electrode branch 210B, respectively. One side of the second insulating pattern 720 may be disposed between the second electrode branch 220B and the embankment 400. That is, the width LI1 of the first insulating pattern 710 may be smaller than the width LI2 of the second insulating pattern 720.

[0171] According to one embodiment, the distance LIp between the first insulating pattern 710 and the second insulating pattern 720 may be greater than the distance LEP between the first electrode branch 210B and the second electrode branch 220B. In addition, the distance LIg between the second insulating pattern 720 and the embankment 400 may be less than the distance LIp between the first insulating pattern 710 and the second insulating pattern 720. As described above, at least one side of each of the first insulating pattern 710 and the second insulating pattern 720 may overlap with a corresponding one of the electrode branches 210B and 220B, but may be horizontally spaced from one side of each of the electrode branches 210B and 220B. Therefore, the distances between them may be different from each other. In an embodiment, each of the widths LI1 and LI2 of the first insulating pattern 710 and the second insulating pattern 720 may be in the range of 10 μm to 20 μm. However, the present disclosure is not limited thereto.

[0172] The display device 10 according to one embodiment includes a second insulating layer 700, the second insulating layer 700 includes the concavo-convex pattern 750 as described above, and the second insulating layer 700 can provide a light travel path, and the light emitted from the light emitting element 300 is output toward the top of each pixel PX or sub-pixel PXn along the light travel path. Therefore, the display device 10 can have improved top light emission efficiency. In addition, the display device 10 may not have a separate bank structure or a reflective layer to reflect the light emitted from the light emitting element 300 upward. Therefore, the manufacturing cost of the display device 10 can be reduced.

[0173] Hereinafter, a method for manufacturing the display device 10 according to one embodiment will be described.

[0174] Figure 8 is a flowchart showing a manufacturing process of a display device according to one embodiment. Figures 9 to 16 is a cross-sectional view showing a manufacturing process of a display device according to an embodiment.

[0175] refer to Figure 8 According to one embodiment, a method for manufacturing a display device 10 includes: preparing a substrate on which a first electrode 210 and a second electrode 220 are provided, and placing a light-emitting element 300 in a space between the first electrode 210 and the second electrode 220 (S100); and forming at least one insulating pattern 710 and 720 (S200) which is separated from the light-emitting element 300, at least partially overlaps with the first electrode 210 and the second electrode 220, and has a concave-convex pattern 750 formed on at least a portion (i.e., at least a partial area) of its top surface.

[0176] The display device 10 according to one embodiment may be manufactured by placing the light emitting element 300 on a substrate on which the first electrode 210 and the second electrode 220 are formed and then respectively forming insulating patterns 710 and 720 having concavo-convex patterns 750. The second insulating material layer 700′ (eg, referring to Fig.11 ) so as to completely overlap with the first electrode 210 and the second electrode 220 and then form each of the insulating patterns 710 and 720 by etching at least a portion of the second insulating material layer 700' or performing a process of pressing at least a portion of the second insulating material layer 700' with a predetermined mold. Specifically, in an embodiment, the insulating patterns 710 and 720 may be formed by performing a patterning method or a nanoimprinting method so that the concave-convex pattern 750 may be disposed thereon, and at the same time, the insulating patterns 710 and 720 may be spaced apart from the light emitting element 300. Hereinafter, a manufacturing process of the display device 10 will be described in detail with reference to other drawings.

[0177] First, refer to Fig. 9 , prepare the first electrode 210 and the second electrode 220 disposed on the through-hole layer 200, and form a first insulating material layer 600' disposed to cover the entire area of ​​the first electrode 210 and the second electrode 220. The first electrode 210 and the second electrode 220 are separated from each other. It can be understood that Fig. 9 The first electrode 210 and the second electrode 220 in the embodiment may be substantially used as the first electrode branch 210B and the second electrode branch 220B, respectively. The description of the structures thereof is the same as above.

[0178] Although not shown in the drawings, the via layer 200 may be provided with Figure 2 In an embodiment, the bank 400 may be directly disposed on the via layer 200. In some cases, the bank 400 may be formed simultaneously with the first insulating material layer 600'. However, in the case of Fig. 9 In the following drawings, the bank 400 will be omitted, and the formation of the insulating patterns 710 and 720 will be described in detail.

[0179] The first insulating material layer 600' may be patterned in a step to be described later to form the first insulating layer 600. The first insulating material layer 600' may be provided to cover the entire area of ​​the top surface of the through-hole layer 200 and the first electrode 210 and the second electrode 220. In a subsequent process, a patterned portion 600P exposing a portion of each of the first electrode 210 and the second electrode 220 is formed. In an embodiment, the first insulating material layer 600' may include an inorganic insulating material. The present disclosure is not limited thereto. The first insulating material layer 600' may include an organic insulating material.

[0180] Next, refer to Fig.10 , at least one light emitting element 300 may be placed in the region between the first electrode 210 and the second electrode 220 and on the first insulating material layer 600'. In the step of placing the light emitting element 300, ink containing the light emitting element 300 may be ejected, and then an electrical signal may be applied to each of the electrodes 210 and 220. Therefore, an electric field may be generated on the ejected ink via the electrical signal applied to each of the electrodes 210 and 220. Therefore, the light emitting element 300 may be subjected to a dielectrophoretic force generated by the electric field. Therefore, the light emitting element 300 subjected to the dielectrophoretic force may be oriented in one direction and may be arranged between the electrodes 210 and 220.

[0181] Next, refer to Fig.11 , forming a second insulating material layer 700' covering the entire area of ​​the top surface of the first insulating material layer 600' and the light emitting element 300. The second insulating material layer 700' may be partially removed in a subsequent process to form insulating patterns 710, 720, and 730. In an embodiment, the second insulating material layer 700' may include an organic insulating material. When the second insulating material layer 700' includes an organic insulating material, the second insulating material layer 700' may be formed in an uncured state so that a concave-convex pattern 750 is formed in a subsequent process. However, the present disclosure is not limited thereto.

[0182] Next, refer to Fig.12 and Fig.13 , a portion of the second insulating material layer 700' is processed to form a plurality of insulating patterns 710, 720, and 730 (S200). The insulating patterns 710, 720, and 730 may include a first insulating pattern 710 and a second insulating pattern 720 including concave-convex patterns 750, respectively, and a third insulating pattern 730 disposed on the light emitting element 300 and exposing at least a portion of the light emitting element 300. The description of the structures and shapes of the first insulating pattern 710, the second insulating pattern 720, and the third insulating pattern 730 are the same as those described above, and thus a detailed description thereof will be omitted.

[0183] According to one embodiment, in the step of forming the insulating patterns 710, 720, and 730, at least a portion of the light emitting element 300 may be exposed, and each of the plurality of concave-convex patterns 750 may be formed on at least a portion of each of the insulating patterns 710, 720, and 730. That is, the step of forming the concave-convex pattern 750 of the display device 10 and the step of exposing two opposite side surfaces of the light emitting element 300 in contact with the contact electrode 260 may occur in the same process. In an embodiment, this process may be performed using a nanoimprint method or a patterning method. Hereinafter, an example in which this process is performed using a nanoimprint method will be described.

[0184] like Fig.12 As shown in , the top surface of the second insulating material layer 700' is pressed using a mold MOLD having one surface with a partial protrusion, and then the top surface of the second insulating material layer 700' is irradiated with ultraviolet rays HV or the top surface of the second insulating material layer 700' is subjected to a heat treatment H process. The mold MOLD has a first region and a second region, the first region having a concave-convex structure opposite to the concave-convex pattern 750 provided on each of the first insulating pattern 710 and the second insulating pattern 720, and the second region having a structure that allows the opposite side of the light emitting element 300 to be exposed and opposite to the structure of the third insulating pattern 730, so as to form the third insulating pattern 730. A concave-convex structure corresponding to the opposite concave-convex structure formed in the mold MOLD may be formed on the second insulating material layer 700' including an uncured organic material. A concavo-convex pattern 750 may be formed on an area of ​​the second insulating material layer 700' that contacts the first area of ​​the mold MOLD, and a third insulating pattern 730 may be formed on an area of ​​the second insulating material layer 700' that contacts the second area of ​​the mold MOLD, and two opposite sides of the light emitting element 300 may be exposed in an area of ​​the second insulating material layer 700' that contacts the second area of ​​the mold MOLD.

[0185] like Fig.13 As shown in , after the mold MOLD has pressed the second insulating material layer 700' and the ultraviolet HV irradiation and heat treatment H process have been performed, the second insulating material layer 700' can be fully hardened. Then, the mold MOLD is removed from the second insulating material layer 700' to form the second insulating layer 700. The second insulating layer 700 may include a first insulating pattern 710, a second insulating pattern 720, and a third insulating pattern 730. Each of the two exposed opposite sides of the light emitting element 300 may be separated from each of the sides 710S and 720S of the first insulating pattern 710 and the second insulating pattern 720. A portion of the first insulating material layer 600' may be exposed in the spacing region and may be etched away in a subsequent process so that a patterned portion 600P may be formed.

[0186] In one example, the process of forming the second insulating layer 700 is not limited thereto. In the process of forming the second insulating layer 700, the concavo-convex pattern 750 may be formed using a patterning process instead of using a mold MOLD.

[0187] Fig.14a , Fig.14b and Fig.14cThe process of forming the second insulating layer 700 is schematically shown. The second insulating layer 700 includes a third insulating pattern 730 and a concave-convex pattern 750, so that the top surface of the second insulating layer 700 may not be flat, but a step may be formed on the top surface thereof. Specifically, the concave-convex pattern 750 having a fine size and a fine pitch may be formed by patterning the top surface of the second insulating material layer 700' with different pressing strengths in different regions of the second insulating material layer 700'. In one example, the process of forming the second insulating layer 700 may be performed by a patterning process using a halftone mask MASK1 or a slit mask MASK2. First, as Fig.14a As shown in , a portion of the second insulating material layer 700' may be patterned to expose two opposite sides of the light emitting element 300. A first insulating pattern 710, a second insulating pattern 720, and a third insulating pattern 730 may be formed. Then, each of the top surfaces of the first insulating pattern 710 and the second insulating pattern 720 may be partially patterned to form a concave-convex pattern 750. In this regard, a method such as Fig.14b or use the halftone mask MASK1 shown in Fig.14c The concavo-convex pattern 750 is formed by using the slit mask MASK2 shown in FIG.

[0188] Each of the top surfaces of the first insulating pattern 710 and the second insulating pattern 720 may be exposed to a light beam using a halftone mask MASK1 or a slit mask MASK2. In this case, even when light is irradiated toward the entire area of ​​the mask, only some of the light beams corresponding to portions of the mask pass through the mask. Therefore, a concave-convex pattern 750 having a fine size and a fine pitch may be formed on the top surface of each of the first insulating pattern 710 and the second insulating pattern 720. The method for manufacturing the display device 10 according to one embodiment may design the shape of the halftone mask MASK1 or the slit mask MASK2 to obtain the first insulating pattern 710 and the second insulating pattern 720 in which the concave-convex pattern 750 is formed. However, the present disclosure is not limited thereto.

[0189] Next, if Fig.15 and Fig.16 As shown in FIG. 1 , a portion of the first insulating material layer 600′ exposed through a space between each of two opposite sides of the light emitting element 300 and each of the first insulating pattern 710 and the second insulating pattern 720 may be etched away to form a patterned portion 600P. The first insulating material layer 600′ may be interrupted at the patterned portion 600P to form the first insulating layer 600.

[0190] Next, although not shown in the drawings, the first contact electrode 261 and the second contact electrode 262 are formed to contact the exposed two opposite side surfaces of the light emitting element 300, respectively, and then the passivation layer 800 covering the first contact electrode 261 and the second contact electrode 262 is formed. In this way, the display device 10 can be manufactured. When the second insulating layer 700 including the plurality of insulating patterns 710, 720, and 730 is formed during the manufacture of the display device 10 using the process described above, the process of exposing the two opposite side surfaces of the light emitting element 300 and the process of forming the concave-convex pattern 750 on the first insulating pattern 710 and the second insulating pattern 720 can be performed simultaneously.

[0191] Furthermore, forming the first and second insulating patterns 710 and 720 respectively including the concavo-convex patterns 750 may allow for omitting a reflective electrode that reflects light emitted from the light emitting element 300 , so that the number of process steps for manufacturing the display device 10 may be reduced, thereby improving manufacturing efficiency.

[0192] In one example, as described above, the shape of the concavo-convex pattern 750 of the display device 10 is not limited to Figure 4 In some cases, the concave or convex portions of the concave-convex pattern 750 may have inclined sides, or have a curved shape.

[0193] Figures 17 to 19 is a cross-sectional view showing a concavo-convex pattern according to another embodiment. Figures 17 to 19 According to another embodiment, Figure 4 Part A corresponds to an enlarged cross-section of the portion.

[0194] refer to Figures 17 to 19 , the concave or convex portion of the concavo-convex pattern 750 according to one embodiment may have an inclined side surface extending from a top surface of the second insulating layer 700 or the first insulating pattern 710 . Fig.17 The concave portion or convex portion of the concave-convex pattern 750 has two opposite side surfaces, and the two opposite side surfaces have a predetermined inclination angle θq. Fig.18 The concave or convex portion of the concavo-convex pattern 750 may have one inclined side surface inclined at an inclination angle θg and an opposite side surface that may extend in a manner perpendicular to the top surface of the first insulating pattern 710 . Fig.19 The convex portion of the concavo-convex pattern 750 may have a curved shape protruding upward. Light incident on the first insulating pattern 710 may be incident on the concavo-convex pattern 750 at different incident angles according to the shape of the concave or convex portion of the concavo-convex pattern 750. The percentage of the amount of light that is not reflected from the concavo-convex pattern 750 but output to the outside through the concavo-convex pattern 750 may be increased.

[0195] In addition, if Fig.18 and Fig.19 As shown in , when the concave or convex portions of the concave-convex pattern 750 have a prism shape or a microlens shape having a curved outer surface, the concave-convex pattern 750 can scatter incident light thereon, and the top light emission efficiency of the display device 10 can be further improved.

[0196] Fig. 20 and Fig.21 is a plan view showing a concavo-convex pattern according to another embodiment.

[0197] First, refer to Fig. 20 , the concavo-convex pattern 750 may be disposed on the first insulating pattern 710 and the second insulating pattern 720 and have a shape extending in one direction. The direction in which the concavo-convex pattern 750 extends is not particularly limited. In one example, the concavo-convex pattern 750 may extend in a direction different from the second direction D2 in which the first insulating pattern 710 extends. In one example, as Fig. 20 As shown in , the concavo-convex pattern 750 may extend in a direction inclined with respect to the second direction D2.

[0198] In addition, reference Fig.21 , the concavo-convex pattern 750 does not extend in one direction and forms one unit. A plurality of concavo-convex patterns 750 may be arranged and spaced apart from each other. That is, the concavo-convex pattern 750 may be arranged in a single grid pattern on the first insulating pattern 710 or the second insulating pattern 720.

[0199] The concave-convex pattern 750 of these various structures may be formed using a mold MOLD having a concave-convex structure opposite to the concave-convex structure of the concave-convex pattern 750 during the manufacturing process of the display device 10. When the opposite concave-convex structure of the mold MOLD has a shape extending in one direction, the concave-convex pattern 750 formed on the first insulating pattern 710 and the second insulating pattern 720 may extend in one direction. When the opposite concave-convex structure of the mold MOLD has a grid pattern, the concave-convex pattern 750 formed on the first insulating pattern 710 and the second insulating pattern 720 may have a grid pattern. However, the present disclosure is not limited thereto.

[0200] Hereinafter, other embodiments of the display device 10 will be described.

[0201] Fig. 22 is a cross-sectional view of a display device according to another embodiment.

[0202] refer to Fig. 22According to one embodiment, the display device 10_1 may include electrodes 210_1 and 220_1 including a material having a high reflectivity. That is, each of the electrodes 210_1 and 220_1 of the display device 10_1 may function as a reflective electrode that reflects incident light. Figure 2 In addition to the different materials of the electrodes 210 and 220 in the display device 10, Fig. 22 The display device 10_1 and Figure 2 Therefore, redundant description will be omitted.

[0203] Light emitted from the light emitting element 300 may be reflected or refracted at an interface between each of the first insulating pattern 710 and the second insulating pattern 720 and another layer, and then may travel. At least a portion of the light may not be reflected but refracted at an interface between each of the first insulating pattern 710 and the second insulating pattern 720 and the first insulating layer 600, and then may be incident on each of the electrodes 210_1 and 220_1.

[0204] The display device 10_1 according to one embodiment may include electrodes 210_1 and 220_1 made of a material having high reflectivity, so that light can be reflected from the electrodes 210_1 and 220_1. In one example, each of the electrodes 210_1 and 220_1 may be made of a material having high reflectivity including a metal such as silver (Ag), copper (Cu), aluminum (Al), or may have a stacked structure of ITO / silver (Ag) / ITO / IZO, or may be made of an alloy including aluminum (Al), nickel (Ni), lanthanum (La), etc. However, the present disclosure is not limited thereto. The display device 10_1 may include electrodes 210_1 and 220_1 made of a material having high reflectivity, and thus may have reduced light loss for each pixel PX or each sub-pixel PXn, and thus may have improved top light emission efficiency.

[0205] Fig.23 and Fig.24 is a cross-sectional view of a display device according to another embodiment.

[0206] refer to Fig.23 In the display device 10_2 according to one embodiment, the first insulating layer 600_2 and the bank 400_2 may be formed in the same process. That is, the first insulating layer 600_2 and the bank 400_2 may be integrated into one layer. In addition to the first insulating layer 600_2 and the bank 400_2 being integrated into a single layer, Fig.23 The display device 10_2 and Figure 2 Therefore, redundant description will be omitted.

[0207] The first insulating layer 600_2 may be formed by patterning an inorganic material or an organic insulating material, or may be formed by using a nanoimprint method. Specifically, in one example, when the first insulating layer 600_2 is formed using a nanoimprint method, a first insulating layer 600_2 having different steps may be formed on a substrate on which electrodes 210 and 220 are formed. The present disclosure is not limited thereto. A slit mask or a halftone mask may be used to form the first insulating layer 600_2 having different steps, and the embankment 400_2 may be formed at the same time. As a result, the process of forming a separate embankment 400 is omitted, so that there is an advantage in the manufacturing process of the display device 10_2.

[0208] refer to Fig.24 In the display device 10_3 according to one embodiment, the second insulating layer 700 may be omitted, and the first insulating layer 600_3 may include a plurality of insulating patterns 610_3, 620_3, and 630_3. Figure 2 The first insulating layer 600, Fig.24 The first insulating layer 600_3 in the embodiment may have a plurality of insulating patterns 610_3, 620_3, and 630_3 having different steps. As described above, the first insulating layer 600_3 may be formed using a nanoimprint method. According to an embodiment, in the process of forming the first insulating layer 600_3, some of the insulating patterns 610_3, 620_3, and 630_3 may have a thickness smaller than that of another of the insulating patterns 610_3, 620_3, and 630_3.

[0209] In an embodiment, the fourth insulation pattern 610_3 and the fifth insulation pattern 620_3 may be separated from the sixth insulation pattern 630_3 by the patterned portion 600P_3. The contact electrodes 261 and 262 may be disposed in the patterned portion 600P_3, and the contact electrodes 261 and 262 may contact the electrode branches 210B and 220B, respectively. Fig.24 In the display device 10_3 , the second insulating layer 700 is omitted so that portions of the first contact electrode 261 and the second contact electrode 262 on the top surface of the light emitting element 300 instead of on the top surface of the third insulating pattern 730 are separated from each other.

[0210] In addition, Fig.24 In the display device 10_3 of FIG. 1 , the first insulating layer 600_3 and the bank 400_3 may be formed in the same process. Therefore, the bank 400_3 may be integrated with a portion of the insulating pattern of the first insulating layer 600_3. The description of the bank 400_3 integrated with the first insulating layer 600_3 is the same as that of the above reference numerals. Fig.23 Same as described.

[0211] The first insulating layer 600_3 may include a fourth insulating pattern 610_3, a fifth insulating pattern 620_3, and a sixth insulating pattern 630_3. The fourth insulating pattern 610_3 and the fifth insulating pattern 620_3 may overlap at least partially with the electrode branches 210B and 220B, respectively. The sixth insulating pattern 630_3 may be disposed between the fourth insulating pattern 610_3 and the fifth insulating pattern 620_3, and may be disposed to cover one end of each of the electrode branches 210B and 220B. In an embodiment, the sixth insulating pattern 630_3 may have a thickness measured in one direction that is less than the thickness of each of the fourth insulating pattern 610_3 and the fifth insulating pattern 620_3. That is, the insulating patterns 610_3, 620_3, and 630_3 may have different vertical dimensions from the through-hole layer 200 so that a step is formed on its top surface. The light emitting element 300 may be disposed on the sixth insulating pattern 630_3 having a vertical dimension smaller than that of each of the other insulating patterns 610_3 and 620_3. Fig.24 The sixth insulating pattern 630_3 may correspond to Figure 2 A portion of the first insulating layer 600 is disposed between the electrode branches 210B and 220B and is separated from other portions of the first insulating layer 600 by the patterned portion 600P.

[0212] In one implementation, each of the fourth and fifth insulation patterns 610_3 and 620_3 may include a concavo-convex pattern 650_3 in which at least a portion of a top surface thereof protrudes upward. Fig.24 The fourth insulating pattern 610_3 and the fifth insulating pattern 620_3 in the embodiment may correspond to Figure 2 The first insulating pattern 710 and the second insulating pattern 720 in the embodiment of the present invention.

[0213] In an embodiment, as in Figure 2 As in the first insulating pattern 710 of the embodiment of the present invention, the fourth insulating pattern 610_3 may be formed so that its two opposite sides are respectively spaced apart from the two opposite sides of the first electrode branch 210B and are horizontally spaced apart while overlapping the first electrode branch 210B. The width of the fourth insulating pattern 610_3 measured in one direction may be smaller than the width of the first electrode branch 210B. The fourth insulating pattern 610_3 may be spaced apart from the sixth insulating pattern 630_3 via the patterned portion 600P_3, and at least one side of the fourth insulating pattern 610_3 may be spaced apart from the light emitting element 300.

[0214] As in Figure 2As in the second insulating pattern 720 of FIG. 1 , the fifth insulating pattern 620_3 may be formed such that one side thereof is horizontally spaced apart from one side of the second electrode branch 220B while vertically overlapping the second electrode branch 220B. However, the opposite side of the fifth insulating pattern 620_3 may be integrally formed with the bank 400_3. Figure 2 The fifth insulating pattern 620_3 may not be separated from the bank 400_3 due to the second insulating pattern 720 in FIG.

[0215] Each of the plurality of concavo-convex patterns 650_3 may be formed on at least a portion of each of the top surfaces of the fourth insulating pattern 610_3 and the fifth insulating pattern 620_3. The concavo-convex pattern 650_3 may be formed on an area where it overlaps with each of the electrode branches 210B and 220B. However, the present disclosure is not limited thereto. In particular, the concavo-convex pattern 650_3 formed on the fifth insulating pattern 620_3 may extend to the embankment 400_3. Different from Figure 2 The display device 10, Fig.24 The display device 10_3 in may be configured such that a portion of the insulating pattern of the first insulating layer 600_3 may include a concave-convex pattern 650_3 located above the light emitting element 300 in a cross-sectional view, so that light emitted from the light emitting element 300 is incident on the fourth insulating pattern 610_3 and the fifth insulating pattern 620_3.

[0216] Fig.24 The display device 10_3 in the embodiment may include the concavo-convex pattern 650_3 providing a traveling path of light emitted from the light emitting element 300 and may not have the second insulating layer 700, and thus has an advantage in the manufacturing process of the display device 10_3.

[0217] Figure 25 to Figure 27 It is shown Fig.24 sectional views of some steps of a manufacturing process of a display device.

[0218] exist Fig.24 In the display device 10_3, the second insulating layer 700 is omitted, and the first insulating layer 600_3 includes a plurality of insulating patterns 610_3, 620_3, and 630_3. The manufacturing process of the display device 10_3 may not form the second insulating layer 700, and may include forming the first insulating layer 600_3 on the electrodes 210 and 220 and placing the light emitting element 300.

[0219] refer to Fig.25 , forming the first electrode 210 and the second electrode 220 on the through hole layer 200, and forming a first insulating material layer 600'_3 covering the entire area of ​​the first electrode 210 and the second electrode 220. Fig. 9 The first insulating material layer 600', Fig.25 The first insulating material layer 600'_3 in the embodiment may have a relatively large thickness. Fig.25 A portion of the first insulating material layer 600'_3 in the embodiment of the present invention is patterned to form a space in which the light emitting element 300 is disposed.

[0220] Next, refer to Fig.26 , at least a portion of the first insulating material layer 600'_3 is patterned to form a fourth insulating pattern 610_3 and a fifth insulating pattern 620_3 including concave-convex patterns 650_3, respectively. The first insulating material layer 600'_3 may have a shape in which a portion thereof is recessed, so that the fourth insulating pattern 610_3 and the fifth insulating pattern 620_3 are spaced apart from each other and face each other. The fourth insulating pattern 610_3 and the fifth insulating pattern 620_3 include side surfaces 610S_3 and 620S_3 that are spaced apart from each other and face each other, respectively. Each of one side surface 610S_3 of the fourth insulating pattern 610_3 and one side surface 620S_3 of the fifth insulating pattern 620_3 may be formed to be inclined relative to each top surface on which each concave-convex pattern 650_3 is formed. The spacing region between the fourth insulating pattern 610_3 and the fifth insulating pattern 620_3 overlaps the spacing region between the first electrode 210 and the second electrode 220. In a subsequent process, the light emitting element 300 may be placed in a spaced region between the fourth insulating pattern 610_3 and the fifth insulating pattern 620_3 .

[0221] Next, refer to Fig. 27 , at least one light emitting element 300 is placed in the spacing area between the fourth insulating pattern 610_3 and the fifth insulating pattern 620_3. A patterned portion 600P_3 partially exposing the first electrode 210 and the second electrode 220 is formed by etching at least a portion of the first insulating material layer 600'_3. The patterned portions 600P_3 may be formed along two opposite sides of the light emitting element 300 disposed on the first insulating material layer 600'_3 and on the two opposite sides, respectively. A sixth insulating pattern 630_3 may be formed between the patterned portions 600P_3. The fourth insulating pattern 610_3 and the fifth insulating pattern 620_3 may be spaced apart from each other via the patterned portion 600P_3, and may be spaced apart from the sixth insulating pattern 630_3 via the patterned portion 600P_3.

[0222] Next, although not shown in the drawings, the first contact electrode 261 and the second contact electrode 262 provided in the patterned portion 600P_3 are formed, and then the passivation layer 800 covering the first contact electrode 261 and the second contact electrode 262 is formed. Fig.24 Display device 10_3.

[0223] Fig.28 is a cross-sectional view of a display device according to still another embodiment. Fig.29 and Fig.30 is a plan view illustrating a hole pattern formed in an insulating pattern according to still another embodiment.

[0224] refer to Fig.28 , the display device 10_4 according to one embodiment may include each of the hole patterns 710h and 720h in which at least a portion of each of the first insulating pattern 710_4 and the second insulating pattern 720_4 is recessed. In addition to each of the first insulating pattern 710_4 and the second insulating pattern 720_4 further including a corresponding one of the hole patterns 710h and 720h, Fig.28 The display device 10_4 and Figure 4 Hereinafter, redundant description will be omitted and the description will be focused on the differences.

[0225] According to one embodiment, the first insulating pattern 710_4 and the second insulating pattern 720_4 to which the light emitted from the light emitting element 300 is incident may include at least one first hole pattern 710h and at least one second hole pattern 720h, respectively. The light incident to the first insulating pattern 710_4 and the second insulating pattern 720_4 may be reflected on the interface between each of the insulating patterns 710_4 and 720_4 and another layer, and then output through the concave-convex pattern 750_4. However, in some cases, some of the light beams traveling in the first insulating pattern 710_4 and the second insulating pattern 720_4 may not be output through the concave-convex pattern 750_4, but may be continuously reflected in the insulating patterns 710_4 and 720_4 and travel in the insulating patterns 710_4 and 720_4.

[0226] In particular, although not shown in the drawings, when the embankment 400 is integrally formed with the second insulating layer 700, a portion of the light incident on the second insulating pattern 720_4 may travel to the position where the embankment 400 is located, and may not be output to the outside. The first insulating pattern 710_4 and the second insulating pattern 720_4 according to one embodiment may include at least one first hole pattern 710h and at least one second hole pattern 720h, respectively, to change the path of the light traveling in the insulating patterns 710_4 and 720_4, so as to minimize the light loss of the incident light. The hole patterns 710h and 720h may include a first hole pattern 710h formed in the first insulating pattern 710_4 and a second hole pattern 720h formed in the second insulating pattern 720_4. As shown in the drawings, a portion of the light traveling in each of the first insulating pattern 710_4 and the second insulating pattern 720_4 may be reflected from a corresponding one of the hole patterns 710h and 720h, and may then be output through the concave-convex pattern 750_4.

[0227] Each of the hole patterns 710h and 720h may be formed by etching at least a portion of a corresponding one of the top surfaces of the first insulating pattern 710_4 and the second insulating pattern 720_4. The depth of each of the hole patterns 710h and 720h is not particularly limited. Each of the depths of the hole patterns 710h and 720h may be less than the thickness of each of the first insulating pattern 710_4 and the second insulating pattern 720_4 so that the first insulating layer 600 is not exposed.

[0228] Each of the two opposite sides of the first insulating pattern 710_4 may face the light emitting element 300 while being spaced apart from the light emitting element 300. The third insulating pattern 730_4 may be disposed on the light emitting element 300 and expose the two opposite sides of the light emitting element 300. The first hole pattern 710h may be located at the center of the first insulating pattern 710_4. In contrast, one side of the second insulating pattern 720_4 faces the light emitting element 300, while the opposite side of the second insulating pattern 720_4 faces the embankment 400. Therefore, the second hole pattern 720h may be disposed adjacent to the embankment 400 and in the second insulating pattern 720_4. The present disclosure is not limited thereto. A plurality of first hole patterns 710h spaced apart from each other and a plurality of second hole patterns 720h spaced apart from each other may be formed in the first insulating pattern 710_4 and the second insulating pattern 720_4, respectively.

[0229] refer to Fig.29In one embodiment, each of the hole patterns 710h and 720h may have a shape extending in one direction and along a corresponding one of the first insulation pattern 710_4 and the second insulation pattern 720_4. Like the concavo-convex pattern 750, each of the hole patterns 710h and 720h may extend in one direction (second direction D2) in which a corresponding one of the first insulation pattern 710_4 and the second insulation pattern 720_4 extends.

[0230] In addition, the present disclosure is not limited thereto. Each of the number of the first hole patterns 710h and the number of the second hole patterns 720h may be larger to define a single unit of hole patterns 710h and 720h. Fig.30 A plurality of first hole patterns 710h spaced apart from each other may be formed in the first insulating pattern 710_4 to form a grid pattern. A plurality of second hole patterns 720h spaced apart from each other may be formed in the second insulating pattern 720_4 to form a grid pattern.

[0231] Fig.31 is a schematic cross-sectional view of a display device according to still another embodiment.

[0232] refer to Fig.31 In the display device 10_5 according to one embodiment, the light emitting element 300 may be located above the concavo-convex pattern 750_5. That is, in the display device 10_5, the vertical dimension measured from the through-hole layer 200 to the top surface of the light emitting element 300 in the cross-sectional view may be greater than the vertical dimension measured from the through-hole layer 200 to the bottom surface of the concavo-convex pattern 750_5. At least a portion of the concavo-convex pattern 750_5 may be located below a virtual plane parallel to the top surface of the light emitting element 300 and flush with the top surface of the light emitting element 300. The third insulating pattern 730_5 may be disposed on the light emitting element 300 and expose two opposite sides of the light emitting element 300.

[0233] The display device 10 according to one embodiment may include a concavo-convex pattern 750 so that light emitted from the light emitting element 300 travels toward the top of each sub-pixel PXn. In the display device 10 as described above, light emitted from the light emitting element 300 may be incident on the first insulating layer 600 or the second insulating layer 700, and may travel in the first insulating layer 600 or the second insulating layer 700, and may be output to the outside through the respective concavo-convex patterns of the first insulating layer 600 or the second insulating layer 700. On the contrary, in Fig.31 In the display device 10_5, light emitted from the light emitting element 300 may not be incident on the first insulating layer 600 or the second insulating layer 700, but may go directly toward the concave-convex pattern 750_5, and then may be reflected from the concave-convex pattern 750_5 and may be emitted toward the top of each subpixel PXn.

[0234] The concavo-convex pattern 750_5 of the display device 10_5 according to one embodiment may have at least one side having an inclined shape relative to the top surface of each of the first insulating pattern 710_5 and the second insulating pattern 720_5, so that light emitted from the light emitting element 300 can be reflected thereon. The inclined side surface of the concavo-convex pattern 750_5 has a predetermined inclination angle relative to a plane parallel to the top surface of the through-hole layer 200. Light emitted from the light emitting element 300 and traveling in a direction parallel to the top surface of the through-hole layer 200 may be reflected from the inclined side surface of the concavo-convex pattern 750_5, and may then be emitted in an upward direction. Fig.31 In the display device 10_5 , light may not be incident on the insulating patterns 710_5 and 720_5 , thereby reducing light loss compared to the display device 10 .

[0235] In one example, the structure of the light emitting element 300 is not limited to Figure 3 The structure shown in , and may have different structures.

[0236] Fig.32 is a schematic diagram of a light emitting element according to another embodiment.

[0237] refer to Fig.32 , the light emitting element 300' may be formed such that a plurality of layers are not stacked in one direction, but each of the layers surrounds the outer surface of another adjacent layer. Figure 3 In addition to the different shapes of each layer of the light emitting element 300, Fig.32 The light emitting element 300' and Figure 3 Hereinafter, the same contents will be omitted and the differences will be described.

[0238] According to one embodiment, the first conductive type semiconductor 310 ′ may extend in one direction, and each of two opposite ends of the first conductive type semiconductor 310 ′ may be tapered. Fig.32 The first conductive type semiconductor 310' in the embodiment may have a rod-shaped or cylindrical body and a conical portion on each of the upper and lower ends of the body. The conical portion on the upper end of the body may have a steeper slope than that of the conical portion on the lower end thereof.

[0239] The active layer 330' surrounds the outer face of the body of the first conductive type semiconductor 310'. The active layer 330' may have a ring shape extending in one direction. The active layer 330' does not surround each of the conical portions of the first conductive type semiconductor 310'. That is, the active layer 330' may only contact the parallel side faces of the first conductive type semiconductor 310'.

[0240] The second conductive semiconductor 320' surrounds the outer surface of the active layer 330' and the upper conical portion of the first conductive semiconductor 310'. The second conductive semiconductor 320' may include a ring-shaped body extending in one direction and an upper conical portion on the upper end of the body. That is, the second conductive semiconductor 320' may directly contact the parallel side surfaces of the active layer 330' and the inclined side surfaces of the upper conical portion of the first conductive semiconductor 310'. However, the second conductive semiconductor 320' does not surround the lower conical portion of the first conductive semiconductor 310'.

[0241] The electrode material layer 370' may be disposed to surround the outer surface of the second conductive type semiconductor 320'. That is, the shape of the electrode material layer 370' may be substantially the same as the shape of the second conductive type semiconductor 320'. That is, the electrode material layer 370' may contact the entire area of ​​the outer surface of the second conductive type semiconductor 320'.

[0242] The insulating film 380' may be disposed to surround the outer surface of the electrode material layer 370' and the outer surface of the first conductive type semiconductor 310'. The insulating film 380' may directly contact the exposed lower end of each of the active layer 330' and the second conductive type semiconductor 320', the outer surface of the electrode material layer 370', and the lower conical portion of the first conductive type semiconductor 310'.

[0243] At the end of the detailed description, those skilled in the art will appreciate that many changes and modifications may be made to the preferred embodiment without departing substantially from the principles of the present invention. Therefore, the preferred embodiments of the present invention disclosed are used only in an overview and descriptive sense, and not for limiting purposes.

Claims

1. A display device, comprising: a first electrode and a second electrode, the second electrode being spaced apart from the first electrode; a first insulating pattern disposed on the first electrode and at least partially overlapping the first electrode, wherein a first side of the first insulating pattern is spaced apart from a first end of the first electrode; a second insulating pattern disposed on the second electrode and at least partially overlapping the second electrode, wherein a second side surface of the second insulating pattern facing the first side surface is spaced apart from a second end of the second electrode facing the first end; at least one concavo-convex pattern disposed on each of the first insulating pattern and the second insulating pattern; as well as At least one light emitting element is disposed between the first insulating pattern and the second insulating pattern, and two ends of the light emitting element are electrically connected to the first electrode and the second electrode, respectively.

2. The display device according to claim 1, wherein: A distance between the first insulating pattern and the second insulating pattern is greater than a distance between the first electrode and the second electrode.

3. The display device according to claim 2, wherein: The concavo-convex pattern has a shape in which at least a portion of a top surface of each of the first insulating pattern and the second insulating pattern protrudes upward, wherein the concavo-convex patterns are spaced apart from each other.

4. The display device according to claim 3, wherein: The concave portion or the convex portion of the concavo-convex pattern has at least one outer side surface inclined with respect to a top surface of each of the first insulating pattern and the second insulating pattern.

5. The display device according to claim 4, wherein: At least a portion of the concavo-convex pattern is located below a reference plane that is parallel to the first electrode and passes through the two ends of the light emitting element.

6. The display device according to claim 3, wherein: The concavo-convex pattern has a curved outer surface.

7. The display device according to claim 3, wherein: The first insulating pattern includes a first hole pattern that is spaced apart from the first side and is formed such that at least a portion of a top surface of the first insulating pattern is recessed, and The second insulating pattern includes a second hole pattern that is spaced apart from the second side and is formed such that at least a portion of a top surface of the second insulating pattern is recessed.

8. The display device according to claim 7, wherein: The concavo-convex pattern is disposed between the first hole pattern and the first side surface, and between the second hole pattern and the second side surface.

9. The display device according to claim 1, further comprising: a fourth insulating pattern, disposed between the first insulating pattern and the first electrode; a fifth insulating pattern disposed between the second insulating pattern and the second electrode; as well as A sixth insulation pattern is disposed between the fourth insulation pattern and the fifth insulation pattern, and the sixth insulation pattern partially covers each of the first end of the first electrode and the second end of the second electrode.

10. The display device according to claim 9, wherein: The light emitting element is disposed on the sixth insulating pattern.

11. The display device according to claim 10, further comprising: a first contact electrode, disposed between the second insulating pattern and the sixth insulating pattern and contacting one end of the light emitting element; as well as The second contact electrode is disposed between the fifth insulating pattern and the sixth insulating pattern and contacts the opposite end of the light emitting element. 12 . The display device of claim 10 , further comprising a third insulating pattern disposed between the first insulating pattern and the second insulating pattern and disposed on at least a portion of a top surface of the light emitting element.

13. The display device according to claim 9, further comprising a bank spaced apart from a second end of the first electrode, the second end of the first electrode being opposite to the first end of the first electrode, in, The first insulation pattern is spaced apart from the bank, and the fourth insulation pattern contacts the bank.

14. The display device according to claim 13, wherein: A second side surface of the first insulation pattern opposite to the first side surface of the first insulation pattern is located between the bank and the second end of the first electrode.

15. The display device according to claim 14, wherein: A distance between the first insulation pattern and the bank is smaller than a distance between the first insulation pattern and the second insulation pattern.

16. The display device according to claim 13, wherein: The bank is integrally formed with the fourth insulation pattern.

17. A display device comprising: a first electrode and a second electrode, the first electrode extending in a first direction, the second electrode extending in the first direction and spaced apart from the first electrode; at least one light-emitting element, disposed between the first electrode and the second electrode; a first insulating pattern extending in the first direction and at least partially overlapping the first electrode; a second insulating pattern extending in the first direction and spaced apart from the first insulating pattern and at least partially overlapping the second electrode; as well as At least one concavo-convex pattern is disposed on each of the first insulating pattern and the second insulating pattern.

18. The display device according to claim 17, wherein: A distance between the first insulating pattern and the second insulating pattern is greater than a distance between the first electrode and the second electrode.

19. The display device according to claim 18, wherein: A first side portion of the first insulation pattern is horizontally spaced inward from one end of the first electrode, and a second side portion of the first insulation pattern opposite to the first side portion horizontally protrudes outward beyond an opposite end of the first electrode.

20. The display device according to claim 19, wherein: Two side portions of the second insulating pattern are horizontally spaced inwardly from both ends of the second electrode, respectively.

21. The display device according to claim 19, wherein: The at least one concavo-convex pattern extends in one direction and is spaced apart from each other in a direction different from the one direction.

22. The display device according to claim 21, wherein: The first insulating pattern includes a first hole pattern in which at least a portion of a top surface of the first insulating pattern is recessed toward the first electrode, wherein the second insulating pattern comprises a second hole pattern, in which at least a portion of a top surface of the second insulating pattern is recessed toward the second electrode, and Each of the first hole pattern and the second hole pattern extends in the first direction.

23. The display device according to claim 22, wherein: The concavo-convex pattern disposed on the first insulating pattern is disposed between the first side portion and the first hole pattern, and The concavo-convex pattern disposed on the second insulating pattern is disposed between each of two opposite side portions of the second insulating pattern and the second hole pattern.

24. A method for manufacturing a display device, the method comprising: preparing a substrate on which a first electrode and a second electrode are disposed, wherein the second electrode is separated from the first electrode; placing at least one light emitting element in a space between the first electrode and the second electrode; and forming at least one insulating pattern that is spaced apart from the light emitting element and at least partially overlaps each of the first electrode and the second electrode, wherein the insulating pattern has a concave-convex pattern in which at least a portion of a top surface of the insulating pattern protrudes upward, Wherein, the at least one insulating pattern comprises: a first insulating pattern at least partially overlapping the first electrode; and The second insulating pattern is spaced apart from the first insulating pattern and at least partially overlaps the second electrode.

25. The method according to claim 24, in, Each of the first insulating pattern and the second insulating pattern is spaced apart from the light emitting element.

26. The method according to claim 25, wherein: The concavo-convex pattern has a shape in which at least a portion of a top surface of each of the first insulating pattern and the second insulating pattern protrudes upward, wherein the concavo-convex patterns are spaced apart from each other.

27. The method according to claim 26, wherein: Forming the at least one insulating pattern includes: forming an insulating material layer that completely covers the first electrode, the second electrode, and the light emitting element; and Two opposite ends of the light emitting element are exposed, and the first and second insulating patterns are formed, on which the concavo-convex patterns are formed.

28. The method according to claim 27, wherein: The forming of the at least one insulating pattern is performed using a nanoimprint process.

29. The method of claim 27, further comprising forming a first contact electrode in contact with the first electrode and one end of the light emitting element and a second contact electrode in contact with the second electrode and an opposite end of the light emitting element.

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