Display device

Abstract

A display device is provided. In one embodiment, another display device comprises at least: an outer bank disposed on a substrate to define a light-emitting region; a first lane in which a first light-emitting element is disposed within the light-emitting region; a second lane in which a second light-emitting element is disposed within the light-emitting region; a third lane in which a third light-emitting element is disposed within the light-emitting region; and a fourth lane in which a fourth light-emitting element is disposed within the light-emitting region, wherein the light-emitting region has a rectangular shape consisting of a first side extending in a first direction and a second side extending in a second direction intersecting the first direction and having a length longer than the first side, and the first lane, the second lane, the third lane and the fourth lane are each spaced apart from each other and may each extend in a third direction intersecting the first direction and the second direction.

Description

Technology Field

[0001] The present invention relates to a display device. Background Technology

[0002] The importance of display devices is increasing along with the development of multimedia. In response to this, various types of display devices, such as Organic Light Emitting Displays (OLEDs) and Liquid Crystal Displays (LCDs), are being used.

[0003] A device for displaying images of a display device includes a display panel such as an organic light-emitting display panel or a liquid crystal display panel. Among these, as a light-emitting display panel, it may include a light-emitting element; for example, in the case of a light-emitting diode (LED), there are organic light-emitting diodes (OLEDs) that use organic materials as fluorescent materials and inorganic light-emitting diodes that use inorganic materials as fluorescent materials.

[0004] Inorganic light-emitting diodes that use inorganic semiconductors as fluorescent materials have the advantage of durability even in high-temperature environments and higher efficiency of blue light compared to organic light-emitting diodes. The problem to be solved

[0005] The problem that the present invention aims to solve is to provide a display device with improved pixel lighting efficiency.

[0006] The problems of the present invention are not limited to those mentioned above, and other unmentioned technical problems will be clearly understood by those skilled in the art from the description below. means of solving the problem

[0007] A display device according to one embodiment for solving the above problem comprises at least: an external bank disposed on a substrate to define a light-emitting region; a first lane in which a first light-emitting element is disposed within the light-emitting region; a second lane in which a second light-emitting element is disposed within the light-emitting region; a third lane in which a third light-emitting element is disposed within the light-emitting region; and a fourth lane in which a fourth light-emitting element is disposed within the light-emitting region, wherein the light-emitting region has a rectangular shape consisting of a first side extending in a first direction and a second side extending in a second direction intersecting the first direction and having a length longer than the first side, and the first lane, the second lane, the third lane, and the fourth lane are each spaced apart from each other and may each extend in a third direction intersecting the first direction and the second direction.

[0008] A display device according to another embodiment for solving the above problem comprises at least: an external bank disposed on a substrate to define a light-emitting region; a first lane in which a first light-emitting element is disposed within the light-emitting region; a second lane in which a second light-emitting element is disposed within the light-emitting region; a third lane in which a third light-emitting element is disposed within the light-emitting region; and a fourth lane in which a fourth light-emitting element is disposed within the light-emitting region, wherein the light-emitting region has a rectangular shape consisting of a first side extending in a first direction and a second side extending in a second direction intersecting the first direction and having a length longer than the first side, and the first lane, the second lane, the third lane, and the fourth lane are each spaced apart from each other, and the first lane and the third lane each extend in a third direction intersecting the first direction and the second direction, and the second lane and the fourth lane each extend in a fourth direction intersecting the first direction, the second direction, and the third direction.

[0009] A display device according to another embodiment for solving the above problem comprises at least an external bank disposed on a substrate to define a light-emitting region; a first lane in which a first light-emitting element is disposed within the light-emitting region; a second lane in which a second light-emitting element is disposed within the light-emitting region; a third lane in which a third light-emitting element is disposed within the light-emitting region; and a fourth lane in which a fourth light-emitting element is disposed within the light-emitting region, wherein the light-emitting region has a rectangular shape consisting of a first side extending in a first direction and a second side extending in a second direction intersecting the first direction and having a length longer than the first side, and the first lane, the second lane, the third lane, and the fourth lane each have a shape that is bent at least once and can be spaced apart from each other. Effects of the invention

[0010] A display device according to one embodiment can improve the lighting efficiency of pixels.

[0011] The effects according to the embodiments are not limited to those exemplified above, and a wider variety of effects are included in this specification. Brief explanation of the drawing

[0012] FIG. 1 is a schematic plan view of a display device according to one embodiment. FIG. 2 is a schematic layout diagram showing a plurality of wirings of a display device according to one embodiment. FIG. 3 is a pixel circuit diagram of a display device according to one embodiment. FIG. 4 is a plan view illustrating the structure of a pixel of a display device according to one embodiment. Figure 5 is a structural diagram of the light-emitting element of Figure 4. Figure 6 is an enlarged view of area A of Figure 4. Figure 7 is a plan view illustrating the arrangement of the alignment electrodes of Figure 6. FIG. 8 is a plan view illustrating the arrangement of the connecting electrode and light-emitting element of FIG. 6. FIG. 9 is a schematic cross-sectional view of a section cut along the line X1-X1` of FIG. 6. FIG. 10 is a schematic cross-sectional view showing a cross-section cut along the line X2-X2' of FIG. 6. FIG. 11 is a schematic cross-sectional view of a section cut along the line X3-X3' of FIG. 6. FIG. 12 is a plan view illustrating the structure of a pixel of a display device according to another embodiment. FIG. 13 is a plan view illustrating the arrangement of the alignment electrodes of FIG. 12. FIG. 14 is a plan view illustrating the arrangement of the connecting electrode and light-emitting element of FIG. 12. FIG. 15 is a plan view illustrating the structure of a pixel of a display device according to another embodiment. FIG. 16 is a plan view illustrating the arrangement of the alignment electrodes of FIG. 15. FIG. 17 is a plan view illustrating the arrangement of the connecting electrode and the light-emitting element of FIG. 15. FIG. 18 is a plan view illustrating the structure of a pixel of a display device according to another embodiment. FIG. 19 is a plan view illustrating the arrangement of the alignment electrodes of FIG. 18. FIG. 20 is a plan view illustrating the arrangement of the connecting electrode and light-emitting element of FIG. 18. Specific details for implementing the invention

[0013] The advantages and features of the present invention and the methods for achieving them will become clear by referring to the embodiments described below in detail together with the accompanying drawings. However, the present invention is not limited to the embodiments disclosed below but may be implemented in various different forms. These embodiments are provided merely to ensure that the disclosure of the present invention is complete and to fully inform those skilled in the art of the scope of the invention, and the present invention is defined only by the scope of the claims.

[0014] When an element or layer is referred to as "above" another element or layer, it includes cases where another layer or element is interposed directly above or in the middle of another element. Likewise, when referred to as "below," "left," and "right," they include cases where they are interposed immediately adjacent to another element or where another layer or material is interposed in the middle. Throughout the specification, the same reference numerals refer to the same components.

[0015] Although terms such as "first," "second," etc., are used to describe various components, it goes without saying that these components are not limited by these terms. These terms are used merely to distinguish one component from another. Therefore, it goes without saying that the first component mentioned below may also be the second component within the technical scope of the present invention.

[0016] The features of each of the various embodiments of the present invention may be combined or combined with one another, either partially or wholly, and may technically enable various interlocking and operation. Each embodiment may be implemented independently of one another or may be implemented together in an associated relationship.

[0017] Specific embodiments will be described below with reference to the attached drawings.

[0018] FIG. 1 is a schematic plan view of a display device according to one embodiment.

[0019] In FIG. 1, a first direction (DR1), a second direction (DR2), and a third direction (DR3) are defined. The first direction (DR1) and the second direction (DR2) may be perpendicular to each other, and the first direction (DR1) and the third direction (DR3) may be perpendicular to each other. The first direction (DR1) may be understood to mean the horizontal direction in the drawing, the second direction (DR2) may be understood to mean the vertical direction in the drawing, and the third direction (DR3) may be understood to mean the upper and lower directions in the drawing, i.e., the thickness direction.

[0020] In the following specification, unless otherwise specified, "direction" may refer to both directions extending along that direction. Additionally, if it is necessary to distinguish between the two "directions" extending to both sides, one side will be referred to as "direction one side" and the other side as "direction other side." Based on FIG. 1, the direction in which the arrow points is referred to as the one side, and the opposite direction is referred to as the other side.

[0021] In the following description, for convenience of explanation, when referring to the surfaces of the display device (1) or each component constituting the display device (1), the surface facing the direction in which the image is displayed, i.e., the third direction (DR3), is referred to as the top surface, and the surface opposite to the top surface is referred to as the bottom surface. However, this is not limited thereto, and the top surface and the other surface of the component may be referred to as the front surface and the back surface, respectively, or as the first surface or the second surface. Additionally, when describing the relative positions of each component of the display device (1), the side facing the third direction (DR3) may be referred to as the top surface, and the other side facing the third direction (DR3) may be referred to as the bottom surface.

[0022] Referring to FIG. 1, the display device (1) displays a video or a still image. The display device (1) may refer to any electronic device that provides a display screen. For example, a television, laptop, monitor, billboard, Internet of Things, mobile phone, smartphone, tablet PC (Personal Computer), electronic watch, smart watch, watch phone, head-mounted display, mobile communication terminal, electronic notebook, e-book, PMP (Portable Multimedia Player), navigation, game console, digital camera, camcorder, etc. that provide a display screen may be included in the display device (1).

[0023] The display device (1) includes a display panel that provides a display screen. Examples of display panels include an inorganic light-emitting diode display panel, an organic light-emitting diode display panel, a quantum dot light-emitting diode display panel, a plasma display panel, a field emission display panel, etc. In the following examples, an inorganic light-emitting diode display panel is used as an example of a display panel, but it is not limited thereto, and if the same technical concept is applicable, it can be applied to other display panels.

[0024] The shape of the display device (1) can be varied in many ways. For example, the display device (1) may have a shape such as a horizontally elongated rectangle, a vertically elongated rectangle, a square, a square with rounded corners (vertices), other polygons, a circle, etc. The shape of the display area (DA) of the display device (1) may also be similar to the overall shape of the display device (1). In FIG. 1, a display device (1) with a rectangular shape having a long length in the second direction (DR2) is exemplified.

[0025] The display device (1) may include a display area (DA) and a non-display area (NDA). The display area (DA) is an area where the screen can be displayed, and the non-display area (NDA) is an area where the screen is not displayed. The display area (DA) may also be referred to as an active area, and the non-display area (NDA) as an inactive area. The display area (DA) may generally occupy the center of the display device (1).

[0026] The display area (DA) may include a plurality of pixels (PX). The plurality of pixels (PX) may be arranged in a matrix direction. The shape of each pixel (PX) may be a planar rectangle or a square, but is not limited thereto, and may be a rhombus shape with each side tilted toward one direction. Each pixel (PX) may be arranged in a stripe type or an island type. Additionally, each of the pixels (PX) may include one or more light-emitting elements that emit light of a specific wavelength range to display a specific color.

[0027] A non-display area (NDA) may be placed around a display area (DA). The non-display area (NDA) may surround the display area (DA) in whole or in part. The display area (DA) is rectangular in shape, and the non-display area (NDA) may be placed adjacent to the four sides of the display area (DA). The non-display area (NDA) may form the bezel of the display device (1). In each non-display area (NDA), wiring or circuit drivers included in the display device (1) may be placed, or external devices may be mounted.

[0028] FIG. 2 is a schematic layout diagram showing a plurality of wirings of a display device according to one embodiment.

[0029] Referring to FIG. 2, the display device (1) may include a plurality of wires. The display device (1) may include a plurality of scan lines (SL; SL1, SL2, SL3), a plurality of data lines (DTL; DTL1, DTL2, DTL3), an initialization voltage wire (VIL), and a plurality of voltage wires (VL; VL1, VL2, VL3, VL4). Additionally, although not shown in the drawing, the display device (1) may have additional wires arranged therein. The plurality of wires may include wires formed of a first conductive layer and extended in a first direction (DR1), and wires formed of a third conductive layer and extended in a second direction (DR2). However, the extension direction of each wire is not limited thereto.

[0030] The first scan line (SL1) and the second scan line (SL2) may be arranged to extend in a first direction (DR1). The first scan line (SL1) and the second scan line (SL2) may be arranged adjacent to each other and spaced apart from other first scan lines (SL1) and second scan lines (SL2) in a second direction (DR2). The first scan line (SL1) and the second scan line (SL2) may be connected to a scan wiring pad (WPD_SC) connected to a scan drive unit (not shown). The first scan line (SL1) and the second scan line (SL2) may be arranged to extend from a pad area (PDA) placed in a non-display area (NDA) to a display area (DA).

[0031] A third scan line (SL3) may be arranged to extend in a second direction (DR2) and spaced apart from another third scan line (SL3) in a first direction (DR1). A single third scan line (SL3) may be connected to one or more first scan lines (SL1) or one or more second scan lines (SL2). Multiple scan lines (SL) may have a mesh structure on the front of the display area (DA), but are not limited thereto.

[0032] Meanwhile, in this specification, the meaning of "connection" may refer not only to one member being connected to another member through mutual physical contact, but also to being connected through another member. Furthermore, this can be understood as one integrated member in which one part and another part are interconnected due to the integrated member. Moreover, the connection between one member and another member may be interpreted to include electrical connection through another member in addition to direct contact.

[0033] Data lines (DTL) may be arranged to extend in a first direction (DR1). The data lines (DTL) include a first data line (DTL1), a second data line (DTL2), and a third data line (DTL3), and the first to third data lines (DTL1, DTL2, DTL3) form a pair and are arranged adjacent to each other. Each data line (DTL1, DTL2, DTL3) may be arranged to extend from a pad area (PDA) located in a non-display area (NDA) to a display area (DA). However, this is not limited thereto, and multiple data lines (DTL) may be arranged spaced apart at equal intervals between the first voltage line (VL1) and the second voltage line (VL2) described later.

[0034] The initial voltage wiring (VIL) may be extended and arranged in a first direction (DR1). The initial voltage wiring (VIL) may be arranged between the data lines (DTL) and the first voltage wiring (VL1). The initial voltage wiring (VIL) may be extended and arranged from the pad area (PDA) located in the non-display area (NDA) to the display area (DA).

[0035] The first voltage wiring (VL1) and the second voltage wiring (VL2) are arranged to extend in the first direction (DR1), and the third voltage wiring (VL3) and the fourth voltage wiring (VL4) are arranged to extend in the second direction (DR2). The first voltage wiring (VL1) and the second voltage wiring (VL2) may be arranged alternately in the second direction (DR2), and the third voltage wiring (VL3) and the fourth voltage wiring (VL4) may be arranged alternately in the first direction (DR1). The first voltage wiring (VL1) and the second voltage wiring (VL2) are arranged to extend in the first direction (DR1) and cross the display area (DA), and the third voltage wiring (VL3) and the fourth voltage wiring (VL4) may each have parts of their wiring placed in the display area (DA) and other parts placed in the non-display area (NDA) located on both sides of the first direction (DR1) of the display area (DA). The first voltage line (VL1) and the second voltage line (VL2) are formed of a first conductive layer, and the third voltage line (VL3) and the fourth voltage line (VL4) may be formed of a third conductive layer disposed on a different layer from the first conductive layer. The first voltage line (VL1) is connected to at least one third voltage line (VL3), and the second voltage line (VL2) is connected to at least one fourth voltage line (VL4). The plurality of voltage lines (VL) may have a mesh structure on the front of the display area (DA). However, they are not limited thereto.

[0036] The first scan line (SL1), the second scan line (SL2), the data line (DTL), the initial voltage line (VIL), the first voltage line (VL1), and the second voltage line (VL2) may be electrically connected to at least one wiring pad (WPD). Each wiring pad (WPD) may be placed in a non-display area (NDA). In one embodiment, each wiring pad (WPD) may be placed in a pad area (PDA) located on the lower side, which is the other side of the first direction (DR1) of the display area (DA). The first scan line (SL1) and the second scan line (SL2) are connected to a scan wiring pad (WPD_SC) placed in the pad area (PDA), and a plurality of data lines (DTL) are each connected to a different data wiring pad (WPD_DT). The initial voltage wiring (VIL) is connected to the initial wiring pad (WPD_Vint), and the first voltage wiring (VL1) is connected to the first voltage wiring pad (WPD_VL1), and the second voltage wiring (VL2) is connected to the second voltage wiring pad (WPD_VL2). An external device may be mounted on the wiring pad (WPD). The external device may be mounted on the wiring pad (WPD) through an anisotropic conductive film, ultrasonic bonding, etc. In the drawing, each wiring pad (WPD) is illustrated as being placed in a pad area (PDA) located below the display area (DA), but is not limited thereto. Some of the plurality of wiring pads (WPD) may be placed above the display area (DA) or in either the left or right side area.

[0037] Each pixel (PX) or subpixel (SPXn, where n is an integer from 1 to 3) of the display device (1) includes a pixel driving circuit. The wiring described above may pass through each pixel (PX) or around it and apply a driving signal to each pixel driving circuit. The pixel driving circuit may include transistors and capacitors. The number of transistors and capacitors in each pixel driving circuit may vary. According to one embodiment, each subpixel (SPXn) of the display device (1) may have a pixel driving circuit with a 3T1C structure that includes three transistors and one capacitor. Hereinafter, the pixel driving circuit is described using a 3T1C structure as an example, but is not limited thereto, and various other modified structures such as a 2T1C structure, a 7T1C structure, and a 6T1C structure may be applied.

[0038] FIG. 3 is a pixel circuit diagram of a display device according to one embodiment.

[0039] Referring to FIG. 3, each subpixel (SPXn) of a display device (1) according to one embodiment includes, in addition to a light-emitting diode (EL), three transistors (T1, T2, T3) and one storage capacitor (Cst).

[0040] A light-emitting diode (EL) emits light according to the current supplied through a first transistor (T1). The light-emitting diode (EL) includes a first electrode, a second electrode, and at least one light-emitting element disposed between them. The light-emitting element can emit light of a specific wavelength range by means of an electrical signal transmitted from the first electrode and the second electrode.

[0041] One end of the light-emitting diode (EL) is connected to the source electrode of the first transistor (T1), and the other end can be connected to a second voltage wiring (VL2) to which a low potential voltage (hereinafter referred to as the second power supply voltage) lower than the high potential voltage (hereinafter referred to as the first power supply voltage) of the first voltage wiring (VL1) is supplied.

[0042] The first transistor (T1) adjusts the current flowing from the first voltage wiring (VL1), to which the first power supply voltage is supplied, to the light-emitting diode (EL) according to the voltage difference between the gate electrode and the source electrode. For example, the first transistor (T1) may be a driving transistor for driving the light-emitting diode (EL). The gate electrode of the first transistor (T1) may be connected to the source electrode of the second transistor (T2), the source electrode may be connected to the first electrode of the light-emitting diode (EL), and the drain electrode may be connected to the first voltage wiring (VL1), to which the first power supply voltage is applied.

[0043] The second transistor (T2) is turned on by a scan signal of the scan line (SL) to connect the data line (DTL) to the gate electrode of the first transistor (T1). The gate electrode of the second transistor (T2) is connected to the scan line (SL), the source electrode is connected to the gate electrode of the first transistor (T1), and the drain electrode can be connected to the data line (DTL).

[0044] The third transistor (T3) is turned on by a scan signal of the scan line (SL) to connect the initial voltage wire (VIL) to one end of the light-emitting diode (EL). The gate electrode of the third transistor (T3) is connected to the scan line (SL), the drain electrode is connected to the initial voltage wire (VIL), and the source electrode can be connected to one end of the light-emitting diode (EL) or the source electrode of the first transistor (T1).

[0045] In one embodiment, the source electrode and drain electrode of each transistor (T1, T2, T3) are not limited to those described above, and may be the opposite. Each of the transistors (T1, T2, T3) may be formed as a thin film transistor. Although FIG. 3 describes each transistor (T1, T2, T3) as being formed as an N-type MOSFET (Metal Oxide Semiconductor Field Effect Transistor), it is not limited thereto. That is, each transistor (T1, T2, T3) may be formed as a P-type MOSFET, or some may be formed as an N-type MOSFET and others as a P-type MOSFET.

[0046] A storage capacitor (Cst) is formed between the gate electrode and the source electrode of the first transistor (T1). The storage capacitor (Cst) stores the difference voltage between the gate voltage and the source voltage of the first transistor (T1).

[0047] In the embodiment of FIG. 3, the gate electrode of the second transistor (T2) may be connected to the scan line (SL1), and the gate electrode of the third transistor (T3) may be connected to the scan line (SL2). In other words, the second transistor (T2) and the third transistor (T3) may be turned on by a scan signal applied on the same scan line. However, this is not limited thereto, and the second transistor (T2) and the third transistor (T3) may be connected to different scan lines and turned on by a scan signal applied on different scan lines.

[0048] Below, the structure of a pixel (PX) of a display device (1) according to one embodiment will be described.

[0049] FIG. 4 is a plan view illustrating the structure of a pixel of a display device according to one embodiment. FIG. 5 is a structural diagram of a light-emitting element of FIG. 4.

[0050] FIG. 4 illustrates the planar arrangement of alignment electrodes (RME), an external bank (BNL), a plurality of light-emitting elements (ED), and a connecting electrode (CNE) placed in a pixel (PX) of a display device (1).

[0051] In FIG. 4, a fourth direction (DR4) is additionally defined. The fourth direction (DR4) may refer to a diagonal direction passing between the first direction (DR1) and the second direction (DR2). Specifically, with respect to FIG. 4, one side of the fourth direction (DR4) may refer to a direction pointing between one side of the second direction (DR2) and the other side of the first direction (DR1), and the other side of the fourth direction (DR4) may refer to a direction pointing between the other side of the second direction (DR2) and one side of the first direction (DR1). The fourth direction (DR4) is a direction on a plane formed by the first direction (DR1) and the second direction (DR2), and may be perpendicular to the third direction (DR3).

[0052] Referring to FIG. 4, each of the pixels (PX) of the display device (1) may include a plurality of subpixels (SPXn). For example, one pixel (PX) may include a first subpixel (SPX1), a second subpixel (SPX2), and a third subpixel (SPX3). The first subpixel (SPX1) may emit light of a first color, the second subpixel (SPX2) may emit light of a second color, and the third subpixel (SPX3) may emit light of a third color. As an example, the first color may be blue, the second color may be green, and the third color may be red. However, not limited thereto, each subpixel (SPXn) may emit light of the same color. In one embodiment, each subpixel (SPXn) may emit blue light. In the drawing, one pixel (PX) is illustrated as containing three subpixels (SPXn), but is not limited thereto, and the pixel (PX) may contain a larger number of subpixels (SPXn).

[0053] Each subpixel (SPXn) of the display device (1) may include a light-emitting region (EMA) and a non-light-emitting region. The light-emitting region (EMA) may be an area where a light-emitting element (ED) is placed and light of a specific wavelength range is emitted. The non-light-emitting region may be an area where a light-emitting element (ED) is not placed and light emitted from the light-emitting element (ED) does not reach and is not emitted.

[0054] The light-emitting region (EMA) can be defined by the outer bank (BNL). In other words, the light-emitting region (EMA) can be a space enclosed by the outer bank (BNL). The light-emitting region (EMA) can have a rectangular shape consisting of a short side in the first direction (DR1) and a long side in the second direction (DR2). This may be intended to facilitate the ejection of the light-emitting element (ED) using an inkjet. A detailed description of the shape of the light-emitting region (EMA) will be provided later.

[0055] The light-emitting region (EMA) may include an area where a light-emitting element (ED) is placed and an area adjacent to the light-emitting element (ED) through which light emitted from the light-emitting element (ED) is emitted. For example, the light-emitting region (EMA) may also include an area where light emitted from the light-emitting element (ED) is reflected or refracted by another component and emitted. A plurality of light-emitting elements (ED) are placed in each subpixel (SPXn), and a light-emitting region may be formed by including the area where they are placed and an area adjacent thereto.

[0056] In the drawings, the light-emitting regions (EMAs) of each subpixel (SPXn) are illustrated as having uniform areas, but are not limited thereto. In some embodiments, each light-emitting region (EMA) of each subpixel (SPXn) may have different areas depending on the color or wavelength of light emitted from the light-emitting element (ED) placed in the corresponding subpixel.

[0057] Each subpixel (SPXn) may further include a sub-region (SA) disposed in the non-emissive region. The sub-region (SA) may be a region separated according to the arrangement of alignment electrodes (RME). The sub-region (SA) may be disposed on one side and the other side of the second direction (DR2) of the emitting region (EMA). The emitting region (EMA) may be alternately arranged in the first direction (DR1), and the sub-region (SA) may extend in the first direction (DR1). Each of the plurality of emitting regions (EMA) and sub-regions (SA) may be repeatedly disposed in the second direction (DR2). Each of the plurality of emitting regions (EMA) may be disposed between the sub-regions (SA).

[0058] A sub-region (SA) may be an area shared by sub-pixels (SPXn) adjacent in the first direction (DR1). For example, the first sub-pixel (SPX1), the second sub-pixel (SPX2), and the third sub-pixel (SPX3) may share the sub-region (SA). Additionally, the sub-region (SA) may be an area shared by sub-pixels (SPXn) adjacent in the second direction (DR2). For example, a sub-region (SA) positioned on both sides of the second direction (DR2) of the outer bank (BNL) shown in FIG. 4 may be shared by a sub-pixel (SPXn) shown in the figure and a sub-pixel (SPXn) adjacent in the second direction (DR2) that is not shown in the figure.

[0059] In the sub-region (SA), light-emitting elements (ED) are not placed so that light is not emitted, but some alignment electrodes (RME) placed in each sub-pixel (SPXn) may be placed therein. The alignment electrodes (RME) placed in different sub-pixels (SPXn) may be separated from each other in the separation section (ROP) of the sub-region (SA).

[0060] Multiple alignment electrodes (RME) and connection electrodes (CNE) are arranged for each subpixel (SPXn) in a shape extending in the fourth direction (DR4).

[0061] The alignment electrode (RME) may include a first alignment electrode (RME1), a second alignment electrode (RME2), and a third alignment electrode (RME3). Each of the first alignment electrode (RME1), the second alignment electrode (RME2), and the third alignment electrode (RME3) may be spaced apart from each other in a first direction (DR1). The plurality of alignment electrodes (RME) may include paths (EDA1, EDA2, EDA3, EDA4; see FIG. 7) in which light-emitting elements (ED) are arranged spaced apart from each other in the first direction (DR1). A detailed description of the plurality of alignment electrodes (RME) will be provided later.

[0062] A second alignment electrode (RME2) may be positioned between a first alignment electrode (RME1) and a third alignment electrode (RME3). Specifically, the second alignment electrode (RME2) may be extended to pass through the central part of the light-emitting region (EMA), the first alignment electrode (RME1) may be positioned on the other side of the first direction (DR1) of the second alignment electrode (RME2), and the third alignment electrode (RME3) may be positioned on one side of the first direction (DR1) of the second alignment electrode (RME2).

[0063] The first alignment electrode (RME1) and the second alignment electrode (RME2) can be electrically connected to a circuit element layer described later through a contact hole penetrating the outer bank (BNL). Specifically, the first alignment electrode (RME1) is electrically connected to a circuit element layer located at the bottom of the outer bank (BNL) through a first electrode contact hole (CTD) that does not overlap with the light-emitting region (EMA), and the second alignment electrode (RME2) can be electrically connected to a circuit element layer located at the bottom of the outer bank (BNL) through a second electrode contact hole (CTS) that does not overlap with the light-emitting region (EMA) (see FIG. 9).

[0064] In some embodiments, the third alignment electrode (RME3) may not be electrically connected to the circuit element layer, but is not limited thereto. For example, the third alignment electrode (RME3) may be electrically connected to the circuit element layer through a contact hole penetrating the outer bank (BNL). FIG. 4 illustrates an example where the third alignment electrode (RME3) is not electrically connected to the circuit element layer.

[0065] Multiple light-emitting elements (EDs) can be placed on the alignment electrode (RME).

[0066] Referring to FIG. 5, the light-emitting element (ED) may be a light-emitting diode, and specifically, the light-emitting element (ED) may be an inorganic light-emitting diode made of inorganic material having a size in the nanometer to micrometer range. The light-emitting element (ED) may be aligned between two electrodes that form polarity when an electric field is formed in a specific direction between the two electrodes facing each other.

[0067] A light-emitting element (ED) according to one embodiment may have a shape that extends in one direction. The light-emitting element (ED) may have a shape such as a cylinder, a rod, a wire, or a tube. However, the shape of the light-emitting element (ED) is not limited thereto, and the light-emitting element (ED) may have various shapes, such as a polygonal prism shape like a cube, a rectangular prism, or a hexagonal prism, or a shape that extends in one direction but has a partially inclined outer surface.

[0068] The light-emitting element (ED) may include a semiconductor layer doped with any conductivity type (e.g., p-type or n-type) dopant. The semiconductor layer may emit light of a specific wavelength range when an electrical signal applied from an external power source is transmitted. The light-emitting element (ED) may include a first semiconductor layer (31), a second semiconductor layer (32), a light-emitting layer (36), an electrode layer (37), and an insulating film (38).

[0069] The first semiconductor layer (31) may be an n-type semiconductor. The first semiconductor layer (31) is Al x Ga y In 1-x-y It may include a semiconductor material having the chemical formula N (0≤x≤1, 0≤y≤1, 0≤x+y≤1). For example, the first semiconductor layer (31) may be one or more of AlGaInN, GaN, AlGaN, InGaN, AlN, and InN doped with an n-type dopant. The n-type dopant doped in the first semiconductor layer (31) may be Si, Ge, Sn, Se, etc.

[0070] The second semiconductor layer (32) is disposed on the first semiconductor layer (31) with the light-emitting layer (36) in between. The second semiconductor layer (32) may be a p-type semiconductor, and the second semiconductor layer (32) is Al x Ga y In 1-x-y It may include a semiconductor material having the chemical formula N (0≤x≤1, 0≤y≤1, 0≤x+y≤1). For example, the second semiconductor layer (32) may be one or more of AlGaInN, GaN, AlGaN, InGaN, AlN, and InN doped with a p-type dopant. The p-type dopant doped in the second semiconductor layer (32) may be Mg, Zn, Ca, Ba, etc.

[0071] Meanwhile, the drawing shows the first semiconductor layer (31) and the second semiconductor layer (32) as being composed of a single layer, but is not limited thereto. Depending on the material of the light-emitting layer (36), the first semiconductor layer (31) and the second semiconductor layer (32) may further include a greater number of layers, such as a clad layer or a TSBR (Tensile strain barrier reducing) layer. For example, the light-emitting device (ED) may further include other semiconductor layers disposed between the first semiconductor layer (31) and the light-emitting layer (36), or between the second semiconductor layer (32) and the light-emitting layer (36). The semiconductor layer disposed between the first semiconductor layer (31) and the light-emitting layer (36) may be one or more of AlGaInN, GaN, AlGaN, InGaN, AlN, InN and SLs doped with an n-type dopant, and the semiconductor layer disposed between the second semiconductor layer (32) and the light-emitting layer (36) may be one or more of AlGaInN, GaN, AlGaN, InGaN, AlN and InN doped with a p-type dopant.

[0072] The light-emitting layer (36) is disposed between the first semiconductor layer (31) and the second semiconductor layer (32). The light-emitting layer (36) may include a material having a single or multiple quantum well structure. If the light-emitting layer (36) includes a material having a multiple quantum well structure, it may have a structure in which a quantum layer and a well layer are alternately stacked in multiple layers. The light-emitting layer (36) can emit light by the coupling of electron-hole pairs according to an electric signal applied through the first semiconductor layer (31) and the second semiconductor layer (32). The light-emitting layer (36) may include materials such as AlGaN, AlGaInN, InGaN, etc. In particular, if the light-emitting layer (36) has a structure in which quantum layers and well layers are alternately stacked in a multiple quantum well structure, 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.

[0073] The light-emitting layer (36) may have a structure in which semiconductor materials with large band gap energy and semiconductor materials with small band gap energy are alternately stacked, and may include different group 3 to group 5 semiconductor materials depending on the wavelength range of the light emitted. The light emitted by the light-emitting layer (36) is not limited to light in the blue wavelength range, and may emit light in the red or green wavelength range depending on the case.

[0074] The electrode layer (37) may be an ohmic connection electrode. However, it is not limited thereto and may be a Schottky connection electrode. The light-emitting element (ED) may include at least one electrode layer (37). The light-emitting element (ED) may include one or more electrode layers (37), but is not limited thereto and the electrode layer (37) may be omitted.

[0075] The electrode layer (37) can reduce the resistance between the light-emitting element (ED) and the electrode or connecting electrode when the light-emitting element (ED) in the display device (1) is electrically connected to the electrode or connecting electrode. The electrode layer (37) may include a conductive metal. For example, the electrode layer (37) may include at least one of aluminum (Al), titanium (Ti), indium (In), gold (Au), silver (Ag), ITO, IZO, and ITZO. With the configuration described above, the two ends of each of the light-emitting elements (ED) may have different polarities. This will be explained later.

[0076] The insulating film (38) is arranged to surround the outer surface of the plurality of semiconductor layers and electrode layers described above. For example, the insulating film (38) may be arranged to surround the outer surface of at least the light-emitting layer (36), but may be formed so that both ends in the longitudinal direction of the light-emitting element (ED) are exposed. Additionally, the insulating film (38) may be formed with a rounded upper surface in cross-section in an area adjacent to at least one end of the light-emitting element (ED).

[0077] The insulating film (38) is made of materials having insulating properties, for example, silicon oxide (SiO₂). x ), silicon nitride (SiN x ), silicon oxynitride (SiO₂ x N y ), aluminum nitride (AlN x ), aluminum oxide (AlO x ), zirconium oxide (ZrO x ), hafnium oxide (HfO x ), and titanium oxide (TiO₂ x It may include at least one of ). In the drawing, the insulating film (38) is illustrated as being formed as a single layer, but is not limited thereto, and in some embodiments, the insulating film (38) may be formed as a multilayer structure in which a plurality of layers are stacked.

[0078] The insulating film (38) can perform the function of protecting the semiconductor layers and electrode layers of the light-emitting element (ED). The insulating film (38) can prevent an electrical short circuit that may occur in the light-emitting layer (36) when in direct contact with the electrode through which an electrical signal is transmitted to the light-emitting element (ED). In addition, the insulating film (38) can prevent a decrease in the light-emitting efficiency of the light-emitting element (ED).

[0079] Additionally, the outer surface of the insulating film (38) may be surface-treated. The light-emitting element (ED) may be sprayed onto the electrode and aligned in a dispersed state within a predetermined ink. Here, in order for the light-emitting element (ED) to remain dispersed without aggregating with other adjacent light-emitting elements (ED) within the ink, the surface of the insulating film (38) may be treated to be hydrophobic or hydrophilic.

[0080] Referring again to FIG. 4, the light-emitting element (ED) may include a first light-emitting element (ED1), a second light-emitting element (ED2), a third light-emitting element (ED3), and a fourth light-emitting element (ED4). The first light-emitting element (ED1) and the second light-emitting element (ED2) may be placed in the spaced-apart space between the first alignment electrode (RME1) and the second alignment electrode (RME2), and the third light-emitting element (ED3) and the fourth light-emitting element (ED4) may be placed in the spaced-apart space between the second alignment electrode (RME2) and the third alignment electrode (RME3). The first light-emitting element (ED1), the second light-emitting element (ED2), the third light-emitting element (ED3), and the fourth light-emitting element (ED4) may be distinguished by their connection relationships with the connecting electrodes (CNE) described later. A detailed explanation thereof will be provided later.

[0081] A connecting electrode (CNE) may be disposed on light-emitting elements (ED). The connecting electrode (CNE) may include a first connecting electrode (CNE1), a second connecting electrode (CNE2), a third connecting electrode (CNE3), a fourth connecting electrode (CNE4), and a fifth connecting electrode (CNE5).

[0082] A portion of the first connecting electrode (CNE1) is connected to the first alignment electrode (RME1) through a first contact portion (CT1) that does not overlap with the light-emitting region (EMA), and another portion of the first connecting electrode (CNE1) can be connected to one end of the first light-emitting element (ED1).

[0083] A part of the second connecting electrode (CNE2) is connected to the other end of the first light-emitting element (ED1), and the other part of the second connecting electrode (CNE2) can be connected to one end of the second light-emitting element (ED2).

[0084] One part of the third connecting electrode (CNE3) is connected to the other end of the second light-emitting element (ED2), and the other part of the third connecting electrode (CNE3) can be connected to one end of the third light-emitting element (ED3).

[0085] One part of the fourth connecting electrode (CNE4) is connected to the other end of the third light-emitting element (ED1), and the other part of the fourth connecting electrode (CNE4) can be connected to one end of the fourth light-emitting element (ED4).

[0086] A portion of the fifth connecting electrode (CNE5) is connected to the other end of the fourth light-emitting element (ED4), and the other portion of the fifth connecting electrode (CNE2) can be connected to the second alignment electrode (RME2) through a second contact portion (CT2) that does not overlap with the light-emitting region (EMA).

[0087] Each of the first connecting electrode (CNE1), the second connecting electrode (CNE2), the third connecting electrode (CNE3), the fourth connecting electrode (CNE4), and the fifth connecting electrode (CNE5) may generally have a shape extending in the fourth direction (DR4). A detailed description of the shapes of the connecting electrodes (CNE) will be provided later.

[0088] Below, the arrangement relationship of a plurality of alignment electrodes (RME), a plurality of connection electrodes (CNE), and a plurality of light-emitting elements (ED) placed in a single subpixel (SPXn) will be explained in detail.

[0089] FIG. 6 is an enlarged view of area A of FIG. 4. FIG. 7 is a plan view illustrating the arrangement of the alignment electrodes of FIG. 6. FIG. 8 is a plan view illustrating the arrangement of the connecting electrodes and light-emitting elements of FIG. 6.

[0090] FIG. 7 illustrates the arrangement of alignment electrodes (RME) based on the external bank (BNL) shown in one subpixel (SPXn) of FIG. 6, and FIG. 8 illustrates the arrangement of light-emitting elements (ED) and connecting electrodes (CNE) based on the external bank (BNL) shown in one subpixel (SPXn) of FIG. 6.

[0091] Referring to FIGS. 7 to 6, a display device (1) according to one embodiment may include an outer bank (BNL) that separates a light-emitting region (EMA) and a sub-region (SA), an inner bank (BP) that is placed in the light-emitting region (EMA), alignment electrodes (RME) that are arranged extending from the light-emitting region (EMA) to a fourth direction (DR4), a plurality of light-emitting elements (ED) arranged in the fourth direction (DR4) between each alignment electrode (RME), and connecting electrodes (CNE) that electrically connect each of the light-emitting elements (ED).

[0092] The outer bank (BNL) can define a light-emitting region (EMA) having a rectangular shape consisting of a short side (EMAa) extending in a first direction (DR1) in a plane and a long side (EMAb) extending in a second direction (DR2). In other words, the outer bank (BNL) acts as a partition surrounding the light-emitting region (EMA) and can surround the light-emitting region (EMA) in a rectangular shape in a plane. Accordingly, when a light-emitting element (ED) is ejected into the light-emitting region (EMA) using an inkjet method during the manufacturing process of the display device (1), it is possible to prevent the light-emitting element (ED) from being ejected beyond the light-emitting region (EMA).

[0093] The length of the short side (EMAa) and the length of the long side (EMAb) of the light-emitting region (EMA) may have specifications determined according to the resolution of the display device (1). The resolution of the display device (1) and the size of the light-emitting region (EMA) may generally have an inverse correlation. Specifically, as the resolution of the display device (1) increases, the number of pixels (PX) per unit area must increase, and accordingly, the size of the light-emitting region (EMA) must decrease. That is, as the resolution of the display device (1) increases, the length of the short side (EMAa) and the length of the long side (EMAb) of the light-emitting region (EMA) may decrease. In some embodiments, the length of the short side (EMAa) of the light-emitting region (EMA) may be approximately 42 μm and the length of the long side (EMAb) may be approximately 81 μm, but is not limited thereto.

[0094] However, as the resolution of the display device (1) increases, if the size of the light-emitting region (EMA) decreases, the number of light-emitting elements (ED) placed in the light-emitting region (EMA) decreases, and the brightness of each pixel (PX) may decrease. Therefore, in order to increase the brightness of each pixel (PX) while increasing the resolution of the display device (1), it is necessary to increase the number of light-emitting elements (ED) placed in the light-emitting region (EMA) having a limited area. Accordingly, the number of light-emitting elements (ED) placed in the light-emitting region (EMA) having a limited area can be increased by arranging the light-emitting elements (ED) in the fourth direction (DR4). A detailed explanation of this will be provided later.

[0095] The inner banks (BP) may be arranged within the light-emitting region (EMA) and have a shape extending in the fourth direction (DR4). The inner banks (BP) may include a first inner bank (BP1), a second inner bank (BP2), and a third inner bank (BP3).

[0096] Based on the light-emitting region (EMA), the first inner bank (BP1) may be offset to the other side of the first direction (DR1), the third inner bank (BP3) may be offset to one side of the first direction (DR1), and the second inner bank (BP2) may be positioned between the first inner bank (BP1) and the second inner bank (BP2).

[0097] The first inner bank (BP1), the second inner bank (BP2), and the third inner bank (BP3) may each be spaced apart from each other in a first direction (DR1). Light-emitting elements (ED) may be arranged in the spaced-out area between the first inner bank (BP1), the second inner bank (BP2), and the third inner bank (BP3). For example, the first light-emitting elements (ED1) and the second light-emitting elements (ED2) may be arranged in the spaced-out area between the first inner bank (BP1) and the second inner bank (BP2), and the third light-emitting elements (ED3) and the fourth light-emitting elements (ED4) may be arranged in the spaced-out area between the second inner bank (BP2) and the third inner bank (BP3).

[0098] By extending the first inner bank (BP1), the second inner bank (BP2), and the third inner bank (BP3) into the fourth direction (DR4), the spacing between the first inner bank (BP1), the second inner bank (BP2), and the third inner bank (BP3) can also be extended into the fourth direction (DR4). Accordingly, a plurality of light-emitting elements (ED) can also be arranged in the fourth direction (DR4).

[0099] A plurality of alignment electrodes (RME) may be disposed on the inner bank (BP). Specifically, a first alignment electrode (RME1) may be disposed on the first inner bank (BP1), a second alignment electrode (RME2) may be disposed on the second inner bank (BP2), and a third alignment electrode (RME3) may be disposed on the third inner bank (BP3).

[0100] The first alignment electrode (RME1) may include a first part (RME1a) extending in a second direction (DR2), a second part (RME1b) extending in a fourth direction (DR4), and a third part (RME1c) extending in a second direction (DR2).

[0101] A first portion (RME1a) of the first alignment electrode (RME1) may cross an outer bank (BNL) and a sub-region (SA) located on the upper side of the light-emitting region (EMA), i.e., on the other side of the second direction (DR2). The first portion (RME1a) may extend to a separation portion (ROP). The first portion (RME1a) may be electrically connected to a circuit element layer described later through a first electrode contact hole (CTD) penetrating the outer bank (BNL).

[0102] Additionally, in some embodiments, the first portion (RME1a) may include a portion protruding to the other side of the first direction (DR1). The portion of the first portion (RME1a) protruding to the other side of the first direction (DR1) may be a portion that is electrically in contact with the first connecting electrode (CNE1).

[0103] The second portion (RME1b) of the first alignment electrode (RME1) is a portion disposed in the light-emitting region (EMA) and can traverse the light-emitting region (EMA) in a fourth direction (DR4). The second portion (RME1b) can extend from one side of the second direction (DR2) of the first portion (RME1a) to the other side of the second direction (DR2) of the third portion (RME1c).

[0104] The third portion (RME1c) of the first alignment electrode (RME1) may cross the outer bank (BNL) and sub-region (SA) located on the lower side of the light-emitting region (EMA), i.e., on one side of the second direction (DR2). The third portion (RME1c) may extend to the separation portion (ROP).

[0105] The first portion (RME2a) of the second alignment electrode (RME2) may cross the outer bank (BNL) and sub-region (SA) located on the upper side of the light-emitting region (EMA), that is, on the other side of the second direction (DR2). The first portion (RME2a) may extend to the separation portion (ROP). The first portion (RME2a) may be electrically connected to the circuit element layer described later through the second electrode contact hole (CTS) penetrating the outer bank (BNL).

[0106] Additionally, in some embodiments, the first portion (RME2a) may include a portion protruding to the other side of the first direction (DR1). The portion of the first portion (RME2a) protruding to the other side of the first direction (DR1) may be a portion that is electrically in contact with the fifth connecting electrode (CNE5).

[0107] The second portion (RME2b) of the second alignment electrode (RME2) is a portion disposed in the light-emitting region (EMA) and can traverse the light-emitting region (EMA) in the fourth direction (DR4). The second portion (RME2b) can extend from one side of the second direction (DR2) of the first portion (RME2a) to the other side of the second direction (DR2) of the third portion (RME2c).

[0108] The third portion (RME2c) of the second alignment electrode (RME2) may cross the outer bank (BNL) and sub-region (SA) located on the lower side of the light-emitting region (EMA), i.e., on one side of the second direction (DR2). The third portion (RME2c) may extend to the separation portion (ROP).

[0109] The first portion (RME3a) of the third alignment electrode (RME3) may cross the outer bank (BNL) and sub-region (SA) positioned above the light-emitting region (EMA), i.e., on the other side of the second direction (DR2). The first portion (RME3a) may extend to the separation portion (ROP).

[0110] The second portion (RME3b) of the third alignment electrode (RME3) is a portion disposed in the light-emitting region (EMA) and can traverse the light-emitting region (EMA) in the fourth direction (DR4). The second portion (RME3b) can extend from one side of the second direction (DR2) of the first portion (RME3a) to the other side of the second direction (DR2) of the third portion (RME3c).

[0111] The third portion (RME3c) of the third alignment electrode (RME3) may cross the outer bank (BNL) and sub-region (SA) located on the lower side of the light-emitting region (EMA), i.e., on one side of the second direction (DR2). The third portion (RME3c) may extend to the separation portion (ROP).

[0112] As shown in FIG. 7, the first alignment electrode (RME1), the second alignment electrode (RME2), and the third alignment electrode (RME3) are spaced apart from each other in the first direction (DR1), and the spaced-out space between the first alignment electrode (RME1), the second alignment electrode (RME2), and the third alignment electrode (RME3) within the light-emitting region (EMA) can define paths (EDA1, EDA2, EDA3, EDA4) in which light-emitting elements (ED) are arranged.

[0113] Specifically, the spacing between the second part (RME1b) of the first alignment electrode (RME1) and the second part (RME2b) of the second alignment electrode (RME2) may include a first channel (EDA1) in which the first light-emitting elements (ED1) are arranged and a second channel (EDA2) in which the second light-emitting elements (ED2) are arranged. The first channel (EDA1) may be positioned on one side of the second direction (DR2) of the second channel (EDA2). Since the spacing between the second part (RME1b) of the first alignment electrode (RME1) and the second part (RME2b) of the second alignment electrode (RME2) crosses the light-emitting region (EMA) in the fourth direction (DR4), the first channel (EDA1) and the second channel (EDA2) may also cross the light-emitting region (EMA) in the fourth direction (DR4). The first channel (EDA1) and the second channel (EDA2) may be spaced apart from each other with a first separation space (CRA1) in between. The first separation space (CRA1) may be a space where the connection part (CNE2c) of the second connecting electrode (CNE2), which will be described later, is placed.

[0114] Additionally, the spacing between the second part (RME2b) of the second alignment electrode (RME2) and the second part (RME3b) of the third alignment electrode (RME3) may include a third channel (EDA3) in which the third light-emitting elements (ED3) are arranged and a fourth channel (EDA4) in which the fourth light-emitting elements (ED4) are arranged. The fourth channel (EDA4) may be positioned on one side of the second direction (DR2) of the third channel (EDA3). Since the spacing between the second part (RME2b) of the second alignment electrode (RME2) and the second part (RME3b) of the third alignment electrode (RME3) crosses the light-emitting region (EMA) in the fourth direction (DR4), the third channel (EDA3) and the fourth channel (EDA4) may also cross the light-emitting region (EMA) in the fourth direction (DR4). The third channel (EDA3) and the fourth channel (EDA4) may be spaced apart from each other with a second separation space (CRA2) in between. The second separation space (CRA2) may be a space where the connection part (CNE4c) of the fourth connecting electrode (CNE4), which will be described later, is placed.

[0115] In each of the plurality of light-emitting elements (ED) shown in FIGS. 6 to 8, namely the first light-emitting element (ED1), the second light-emitting element (ED2), the third light-emitting element (ED3), and the fourth light-emitting element (ED4), a portion having a different polarity is separated. For convenience of explanation, the hatched portion of the light-emitting element (ED) will be referred to as "one end" and the unhatched portion as "the other end" in the following description.

[0116] For example, one end of the light-emitting element (ED) may be a portion adjacent to the second semiconductor layer (32) based on the light-emitting element (ED) shown in FIG. 5, and the other end may be a portion adjacent to the first semiconductor layer (31). Accordingly, one end and the other end of a single light-emitting element (ED) may have different polarities, but each of the different light-emitting elements (ED) may have the same polarity and the other end may have the same polarity. Specifically, one end (ED1a) of the first light-emitting element (ED1), one end (ED2a) of the second light-emitting element (ED2), one end (ED3a) of the third light-emitting element (ED3), and one end (ED4a) of the fourth light-emitting element (ED4) have the same polarity as each other, and the other end (ED1b) of the first light-emitting element (ED1), the other end (ED2b) of the second light-emitting element (ED2), the other end (ED3b) of the third light-emitting element (ED3), and the other end (ED4b) of the fourth light-emitting element (ED4) may have the same polarity as each other.

[0117] In the manufacturing process of a display device (1) according to one embodiment, the placement of light-emitting elements (ED) can be performed through a process of discharging ink in which light-emitting elements (ED) are dispersed onto an alignment electrode (RME) and aligning the light-emitting elements (ED) by applying different voltages to the alignment electrode (RME). For example, when an electric signal is applied to each of the first alignment electrode (RME1), the second alignment electrode (RME2), and the third alignment electrode (RME3), an electric field is generated in the ink in which light-emitting elements (ED) are dispersed, and the light-emitting elements (ED) receive a dielectrophoresis (DEP) force from the electric field, and can be placed in the spaced-out space between the first alignment electrode (RME1), the second alignment electrode (RME2), and the third alignment electrode (RME3) while changing their orientation direction and position.

[0118] Specifically, if the same electrical signal is applied to the first alignment electrode (RME1) and the third alignment electrode (RME3), and an electrical signal different from the electrical signal applied to the first alignment electrode (RME1) and the third alignment electrode (RME3) is applied to the second alignment electrode (RME2), then one end of each of the light-emitting elements (ED) may be arranged in the first alignment electrode (RME1) and the third alignment electrode (RME3), and the other end of each of the light-emitting elements (ED) may be arranged in the second alignment electrode (RME2). Accordingly, one end (ED1a) of the first light-emitting element (ED1) is placed on the first alignment electrode (RME1), and the other end (ED1b) of the first light-emitting element (ED1) is placed on the second alignment electrode (RME2); one end (ED2a) of the second light-emitting element (ED2) is placed on the first alignment electrode (RME1), and the other end (ED2b) of the second light-emitting element (ED2) is placed on the second alignment electrode (RME2); one end (ED3a) of the third light-emitting element (ED3) is placed on the third alignment electrode (RME3), and the other end (ED3b) of the third light-emitting element (ED3) is placed on the second alignment electrode (RME2); one end (ED4a) of the fourth light-emitting element (ED4) is placed on the third alignment electrode (RME3), and the other end (ED4b) of the fourth light-emitting element (ED4) can be placed on the second alignment electrode (RME2).

[0119] The first channel (EDA1) and the second channel (EDA2) may have relative positions sharing a straight line parallel to the fourth direction (DR4) as part of the spaced-out space between the first alignment electrode (RME1) and the second alignment electrode (RME2). Accordingly, the first light-emitting element (ED1) and the second light-emitting element (ED2) may also have relative positions sharing a straight line parallel to the fourth direction (DR4). Specifically, one end (ED1a) of the first light-emitting element (ED1) and one end (ED2a) of the second light-emitting element (ED2) may have relative positions sharing a straight line parallel to the fourth direction (DR4), and the other end (ED1b) of the first light-emitting element (ED1) and the other end (ED2b) of the second light-emitting element (ED2) may have relative positions sharing a straight line parallel to the fourth direction (DR4). However, one end (ED1a) of the first light-emitting element (ED1) and the other end (ED2b) of the second light-emitting element (ED2) are positioned at relative positions that do not share a straight line parallel to the fourth direction (DR4) and are non-overlapping in the fourth direction (DR4), and the other end (ED1b) of the first light-emitting element (ED1) and one end (ED2a) of the second light-emitting element (ED2) are positioned at relative positions that do not share a straight line parallel to the fourth direction (DR4) and are non-overlapping in the fourth direction (DR4).

[0120] Likewise, the third channel (EDA3) and the fourth channel (EDA4) may have relative positions sharing a straight line parallel to the fourth direction (DR4) as part of the spaced-out space between the second alignment electrode (RME2) and the third alignment electrode (RME3). Accordingly, the third light-emitting element (ED3) and the fourth light-emitting element (ED4) may also have relative positions sharing a straight line parallel to the fourth direction (DR4). Specifically, one end (ED3a) of the third light-emitting element (ED3) and one end (ED4a) of the fourth light-emitting element (ED4) may have relative positions sharing a straight line parallel to the fourth direction (DR4), and the other end (ED3b) of the third light-emitting element (ED3) and the other end (ED4b) of the fourth light-emitting element (ED4) may have relative positions sharing a straight line parallel to the fourth direction (DR4). However, one end (ED3a) of the third light-emitting element (ED3) and the other end (ED4b) of the fourth light-emitting element (ED4) are positioned at relative positions that do not share a straight line parallel to the fourth direction (DR4) and are non-overlapping in the fourth direction (DR4), and the other end (ED3b) of the third light-emitting element (ED3) and one end (ED4a) of the fourth light-emitting element (ED4) are positioned at relative positions that do not share a straight line parallel to the fourth direction (DR4) and are non-overlapping in the fourth direction (DR4).

[0121] One end and the other end of different light-emitting elements (ED) can be electrically connected by a connecting electrode (CNE).

[0122] A connecting electrode (CNE) may be disposed on a light-emitting element (ED). The connecting electrode (CNE) may include a first connecting electrode (CNE1), a second connecting electrode (CNE2), a third connecting electrode (CNE3), a fourth connecting electrode (CNE4), and a fifth connecting electrode (CNE5) that are spaced apart from each other as described above.

[0123] The first connecting electrode (CNE1) may include a first portion (CNE1a) extending generally in the second direction (DR2) and a second portion (CNE1b) extending in the fourth direction (DR4) in the light-emitting region (EMA).

[0124] The first part (CNE1a) of the first connecting electrode (CNE1) may include a portion protruding to the other side of the first direction (DR1). The portion of the first part (CNE1a) protruding to the other side of the first direction (DR1) overlaps in the third direction (DR3) with the portion of the first alignment electrode (RME1) described above protruding to the other side of the first direction (DR1), and may be electrically connected to each other through the first contact portion (CT1). Accordingly, a first power supply voltage may be supplied to the first connecting electrode (CNE1).

[0125] The second portion (CNE1b) of the first connecting electrode (CNE1) can contact one end (ED1a) of each of the first light-emitting elements (ED1). Since the first power supply voltage is supplied to the first connecting electrode (CNE1) through the first contact portion (CT1), the first power supply voltage can be supplied to one end (ED1a) of each of the first light-emitting elements (ED1).

[0126] The second part (CNE1b) extends to the fourth direction (DR4), but can extend to the part where the first channel (EDA1) is arranged. In other words, the second part (CNE1b) overlaps with the first channel (EDA1) in the first direction (DR1) and does not overlap with the second channel (EDA2) in the first direction (DR1). In other words, the second part (CNE1b) can extend only to the vicinity of the center of the light-emitting region (EMA), that is, the vicinity where the first light-emitting element (ED1) is arranged.

[0127] The second connecting electrode (CNE2) generally extends in the fourth direction (DR4) and can serve to electrically connect the other end (ED1b) of the first light-emitting element (ED1) and one end (ED2a) of the second light-emitting element (ED2). The second connecting electrode (CNE2) may include a first part (CNE2a) extending in the fourth direction (DR4), a second part (CNE2b) extending in the fourth direction (DR4), and a connecting part (CNE2c) connecting the first part (CNE2a) and the second part (CNE2b).

[0128] The first portion (CNE2a) of the second connecting electrode (CNE2) may come into contact with the other end (ED1b) of each of the first light-emitting elements (ED1). The first portion (CNE2a) may extend in the fourth direction (DR4) to the vicinity where the second portion (CNE1b) of the first connecting electrode (CNE1) extends, that is, to the vicinity where the first light-emitting elements (ED1) are arranged.

[0129] The second portion (CNE2b) of the second connecting electrode (CNE2) can be in contact with one end (ED2a) of each of the second light-emitting elements (ED2). The second portion (CNE2b) can be extended in a fourth direction (DR4) to the vicinity where the second light-emitting elements (ED2) are arranged within the light-emitting region (EMA).

[0130] The connecting portion (CNE2c) of the second connecting electrode (CNE2) can serve to connect the first portion (CNE2a) and the second portion (CNE2b). As described above, the first portion (CNE2a) and the second portion (CNE2b) are respectively placed on the other end (ED1b) of the first light-emitting element (ED1) and one end (ED2a) of the second light-emitting element (ED2), so their relative positions may differ. Accordingly, the first portion (CNE2a) and the second portion (CNE2b) can be connected through the connecting portion (CNE2c) that crosses the first separation space (CRA1) between the first channel (EDA1) and the second channel (EDA2) in a direction intersecting the fourth direction (DR4).

[0131] The third connecting electrode (CNE3) can serve to electrically connect the other end (ED2b) of the second light-emitting element (ED2) and one end (ED3a) of the third light-emitting element (ED3). The third connecting electrode (CNE3) may include a first part (CNE3a) extending in the fourth direction (DR4), a second part (CNE3b) extending in the fourth direction (DR4), and a connecting part (CNE3c) connecting the first part (CNE3a) and the second part (CNE3b).

[0132] The first portion (CNE3a) of the third connecting electrode (CNE3) may be in contact with the other end (ED2b) of each of the second light-emitting elements (ED2). The first portion (CNE3a) may be extended in the fourth direction (DR4) to the vicinity where the second light-emitting elements (ED2) are arranged within the light-emitting region (EMA). In other words, the first portion (CNE3a) of the third connecting electrode (CNE3) may be extended to the vicinity where the connecting portion (CNE2c) of the second connecting electrode (CNE2) is placed.

[0133] The second portion (CNE3b) of the third connecting electrode (CNE3) can be in contact with one end (ED3a) of each of the third light-emitting elements (ED3). The second portion (CNE3b) can be extended in a fourth direction (DR4) to the vicinity where the third light-emitting elements (ED3) are arranged within the light-emitting region (EMA).

[0134] The connecting portion (CNE3c) of the third connecting electrode (CNE3) can serve to connect the first portion (CNE3a) and the second portion (CNE3b). The third connecting electrode (CNE3) can be extended in a direction intersecting the fourth direction (DR4) to connect the first portion (CNE3a) and the second portion (CNE3b). In some embodiments, the connecting portion (CNE3c) may overlap with the outer bank (BNL) located on one side of the second direction (DR2) of the light-emitting region (EMA) in the third direction (DR3), but is not limited thereto.

[0135] The fourth connecting electrode (CNE4) generally extends in the fourth direction (DR4) and can serve to electrically connect the other end (ED3b) of the third light-emitting element (ED3) and one end (ED4a) of the fourth light-emitting element (ED4). The fourth connecting electrode (CNE4) may include a first part (CNE4a) extending in the fourth direction (DR4), a second part (CNE4b) extending in the fourth direction (DR4), and a connecting part (CNE4c) connecting the first part (CNE4a) and the second part (CNE4b).

[0136] A first portion (CNE4a) of the fourth connecting electrode (CNE4) may contact the other end (ED3b) of each of the third light-emitting elements (ED3). The first portion (CNE4a) may extend in a fourth direction (DR4) to the vicinity where the third light-emitting elements (ED3) are arranged.

[0137] The second portion (CNE4b) of the fourth connecting electrode (CNE4) can be in contact with one end (ED4a) of each of the fourth light-emitting elements (ED4). The second portion (CNE4b) can be extended in the fourth direction (DR4) to the vicinity where the fourth light-emitting elements (ED4) are arranged within the light-emitting region (EMA).

[0138] The connecting portion (CNE4c) of the fourth connecting electrode (CNE4) can serve to connect the first portion (CNE4a) and the second portion (CNE4b). As described above, the first portion (CNE4a) and the second portion (CNE4b) are respectively positioned on the other end (ED3b) of the third light-emitting element (ED3) and one end (ED4a) of the fourth light-emitting element (ED4), so their relative positions may differ. Therefore, the first portion (CNE4a) and the second portion (CNE4b) can be connected through the connecting portion (CNE4c) that crosses the second separation space (CRA2) between the third channel (EDA3) and the fourth channel (EDA4) in a direction intersecting the fourth direction (DR4).

[0139] The fifth connecting electrode (CNE5) may include a first portion (CNE5a) extending generally in the second direction (DR2) and a second portion (CNE5b) extending in the fourth direction (DR4) in the light-emitting region (EMA).

[0140] The first part (CNE5a) of the fifth connecting electrode (CNE5) may include a portion protruding to the other side of the first direction (DR1). The portion of the first part (CNE5a) protruding to the other side of the first direction (DR1) overlaps in the third direction (DR3) with the portion of the second alignment electrode (RME2) described above protruding to the other side of the first direction (DR1), and may be electrically connected to each other through the second contact portion (CT2). Accordingly, a second power supply voltage may be supplied to the fifth connecting electrode (CNE5).

[0141] The second part (CNE5b) of the fifth connecting electrode (CNE5) can contact the other end (ED4b) of each of the fourth light-emitting elements (ED4). Since the second power supply voltage is supplied to the fifth connecting electrode (CNE5) through the second contact part (CT2), the second power supply voltage can be supplied to the other end (ED4b) of each of the fourth light-emitting elements (ED4).

[0142] With the configuration described above, the first light-emitting element (ED1), the second light-emitting element (ED2), the third light-emitting element (ED3), and the fourth light-emitting element (ED4) are electrically connected in series so that the brightness of the pixel (PX) can be increased.

[0143] Meanwhile, the length of the fourth direction (DR4) of each of the first channel (EDA1), second channel (EDA2), third channel (EDA3), and fourth channel (EDA4) may be equal to or greater than half the length of the second direction (DR2) of the long side (EDAb) of the light-emitting region (EDA). Specifically, the length of the second direction (DR2) of the long side (EDAb) of the light-emitting region (EDA) is equal to twice the length of the first width (H1) of the second direction (DR2), and the length of the fourth direction (DR4) (L1) of the first channel (EDA1), the length of the fourth direction (DR4) (L2) of the second channel (EDA2), the length of the fourth direction (DR4) (L3) of the third channel (EDA3), and the length of the fourth direction (DR4) (L4) of the fourth channel (EDA4) may be equal to or greater than the length of the first width (H1).

[0144] If the alignment electrodes (RME) are extended in the second direction (DR2) within the light-emitting region (EMA) and the light-emitting elements (ED) are arranged in the second direction (DR2), the space through which the connection portion (CNE2c) of the second connection electrode (CNE2) and the connection portion (CNE4c) of the fourth connection electrode (CNE4) pass must be taken into account, so the length of the path where the light-emitting elements (ED) are arranged may be smaller than the length of the first width (H1). Accordingly, a larger number of light-emitting elements (ED) can be arranged compared to the case where the alignment electrodes (RME) are extended in the second direction (DR2) within the light-emitting region (EMA) and the light-emitting elements (ED) are arranged in the second direction (DR2).

[0145] In addition, the length of the fourth direction (DR4) (L1) of the first channel (EDA1), the length of the fourth direction (DR4) (L2) of the second channel (EDA2), the length of the fourth direction (DR4) (L3) of the third channel (EDA3), and the length of the fourth direction (DR4) (L4) of the fourth channel (EDA4) may each be 44 μm or more. Generally, as the length of the channel increases, the number of light-emitting elements (ED) placed in the channel increases, so the light-emitting efficiency may increase. If the length (L1) of the fourth direction (DR4) of the first channel (EDA1), the length (L2) of the fourth direction (DR4) of the second channel (EDA2), the length (L3) of the fourth direction (DR4) of the third channel (EDA3), and the length (L4) of the fourth direction (DR4) of the fourth channel (EDA4) are each 44 μm or more, the number of light-emitting elements (ED) that provide the minimum light-emitting efficiency required to display the screen of the display device (1) can be secured. If the length (L1) of the fourth direction (DR4) of the first channel (EDA1), the length (L2) of the fourth direction (DR4) of the second channel (EDA2), the length (L3) of the fourth direction (DR4) of the third channel (EDA3), and the length (L4) of the fourth direction (DR4) of the fourth channel (EDA4) are each less than 44 μm, the maximum light-emitting efficiency required by the display device (1) may not be provided.

[0146] Therefore, by extending the length of the diagonal of the path (EDA1, EDA2, EDA3, EDA4) where the light-emitting elements (EDs) are arranged, it is easy to secure the number of light-emitting elements (EDs) that provide the minimum light-emitting efficiency required by the display device.

[0147] Hereinafter, the stacked structure of the elements forming the display device (1) according to one embodiment will be described.

[0148] FIG. 9 is a schematic cross-sectional view taken along the line X1-X1' of FIG. 6. FIG. 10 is a schematic cross-sectional view taken along the line X2-X2' of FIG. 6. FIG. 11 is a schematic cross-sectional view taken along the line X3-X3' of FIG. 6.

[0149] FIG. 9 illustrates a cross-section across a plurality of electrode contact holes (CTD, CTS) and contact portions (CT1, CT2), FIG. 10 illustrates a cross-section across both ends of the first light-emitting element (ED1) and the fourth light-emitting element (ED4), and FIG. 11 illustrates a cross-section across both ends of the second light-emitting element (ED2) and the third light-emitting element (ED3).

[0150] Referring to FIGS. 9 to 11, the cross-sectional structure of the display device (1) is described as follows: the display device (1) may include a substrate (SUB), a semiconductor layer disposed thereon, a plurality of conductive layers, and a plurality of insulating layers. Additionally, the display device (1) may include a plurality of electrodes (RME), a light-emitting element (ED), and a connecting electrode (CNE) as described above. The semiconductor layer, the conductive layer, and the insulating layer may each constitute a circuit element layer of the display device (1).

[0151] The substrate (SUB) may be made of an insulating material such as glass, quartz, or polymer resin. Additionally, the substrate (SUB) may be a rigid substrate (SUB), but may also be a flexible substrate (SUB) capable of bending, folding, rolling, etc.

[0152] A circuit element layer may be disposed on a substrate (SUB). The circuit element layer may have various wirings disposed thereon to transmit electrical signals to a light-emitting element (ED) disposed on the substrate (SUB). As illustrated in FIGS. 9 to 11, the circuit layer (CCL) may be a plurality of conductive layers, including a first conductive layer, a semiconductor layer, a second conductive layer, and a third conductive layer, and may be a plurality of insulating layers, including a buffer layer (BL), a first gate insulating layer (GI), a first interlayer insulating layer (IL1), and a first protective layer (PV1).

[0153] The first conductive layer may be disposed on a substrate (SUB). The first conductive layer includes a lower metal layer (BML), and the lower metal layer (BML) is disposed to overlap with the active layer (ACT1) of the first transistor (TR1). The lower metal layer (BML) may perform the function of preventing light from being incident on the first active layer (ACT1) of the first transistor (TR1), or electrically connecting to the first active layer (ACT1) to stabilize the electrical characteristics of the first transistor (TR1). However, the lower metal layer (BML) may be omitted.

[0154] A buffer layer (BL) can be disposed on a lower metal layer (BML) and a substrate (SUB). The buffer layer (BL) is formed on the substrate (SUB) to protect the transistors of the pixel (PX) from moisture penetrating through the substrate (SUB), which is susceptible to moisture permeability, and can perform a surface planarization function.

[0155] The semiconductor layer is disposed on the buffer layer (BL). The semiconductor layer may include a first active layer (ACT1) of the first transistor (TR1) and a second active layer (ACT2) of the second transistor (TR2). The first active layer (ACT1) and the second active layer (ACT2) may be disposed to partially overlap with the first gate electrode (G1) and the second gate electrode (G2) of the second conductive layer, respectively, which will be described later.

[0156] The semiconductor layer may include polycrystalline silicon, single-crystal silicon, oxide semiconductors, etc. In another embodiment, the semiconductor layer may include polycrystalline silicon. The oxide semiconductor may be an oxide semiconductor containing indium (In). For example, the oxide semiconductor may be at least one of indium tin oxide (ITO), indium zinc oxide (IZO), indium gallium oxide (IGO), indium zinc tin oxide (IZTO), indium gallium tin oxide (IGTO), indium gallium zinc oxide (IGZO), and indium gallium zinc tin oxide (IGZTO).

[0157] In the drawing, a first transistor (TR1) and a second transistor (TR2) are shown arranged in a pixel (PX) of a display device (1), but the display device (1) is not limited thereto and may include a larger number of transistors.

[0158] The first gate insulating layer (GI) is disposed on the semiconductor layer in the display area (DA). The first gate insulating layer (GI) can serve as the gate insulating film for each transistor (TR1, TR2). In the drawings, the first gate insulating layer (GI) is illustrated as being patterned together with the gate electrodes (G1, G2) of the second conductive layer described later, and partially disposed between the second conductive layer and the active layer (ACT1, ACT2) of the semiconductor layer. However, it is not limited thereto. In some embodiments, the first gate insulating layer (GI) may be disposed entirely on the buffer layer (BL).

[0159] A second conductive layer is disposed on the first gate insulating layer (GI). The second conductive layer may include a first gate electrode (G1) of the first transistor (TR1) and a second gate electrode (G2) of the second transistor (TR2). The first gate electrode (G1) may be disposed to overlap the channel region of the first active layer (ACT1) in the third direction (DR3), which is the thickness direction, and the second gate electrode (G2) may be disposed to overlap the channel region of the second active layer (ACT2) in the third direction (DR3), which is the thickness direction.

[0160] The first interlayer insulating layer (IL1) is disposed on the second conductive layer. The first interlayer insulating layer (IL1) functions as an insulating film between the second conductive layer and other layers disposed thereon, and can protect the second conductive layer.

[0161] The third conductive layer is disposed on the first interlayer insulating layer (IL1). The third conductive layer may include a first voltage wiring (VL1) and a second voltage wiring (VL2) disposed in a display area (DA), a first conductive pattern (CDP1), and source electrodes (S1, S2) and drain electrodes (D1, D2) of each transistor (TR1, TR2).

[0162] A high potential voltage (or a first power supply voltage) delivered to the first electrode (RME1) can be applied to the first voltage line (VL1), and a low potential voltage (or a second power supply voltage) delivered to the second alignment electrode (RME2) can be applied to the second voltage line (VL2). A portion of the first voltage line (VL1) can contact the first active layer (ACT1) of the first transistor (TR1) through a contact hole that penetrates the first interlayer insulation layer (IL1). The first voltage line (VL1) can serve as the first drain electrode (D1) of the first transistor (TR1). The first voltage line (VL1) can be directly connected to the first alignment electrode (RME1), and the second voltage line (VL2) can be directly connected to the second alignment electrode (RME2).

[0163] The first conductive pattern (CDP1) can contact the first active layer (ACT1) of the first transistor (TR1) through a contact hole penetrating the first interlayer insulating layer (IL1). The first conductive pattern (CDP1) can contact the lower metal layer (BML) through another contact hole penetrating the first interlayer insulating layer (IL1) and the buffer layer (BL). The first conductive pattern (CDP1) can serve as the first source electrode (S1) of the first transistor (TR1). Additionally, the first conductive pattern (CDP1) can be connected to the first electrode (RME1) or the first connection electrode (CNE1) described later. The first transistor (TR1) can transmit the first power supply voltage applied from the first voltage wiring (VL1) to the first electrode (RME1) or the first connection electrode (CNE1).

[0164] The second source electrode (S2) and the second drain electrode (D2) can each contact the second active layer (ACT2) of the second transistor (TR2) through a contact hole penetrating the first interlayer insulating layer (IL1).

[0165] The first protective layer (PV1) is disposed on the third conductive layer. The first protective layer (PV1) functions as an insulating film between the third conductive layer and other layers and can protect the third conductive layer.

[0166] The above-described buffer layer (BL), first gate insulating layer (GI), first interlayer insulating layer (IL1), and first protective layer (PV1) may be composed of a plurality of inorganic layers stacked alternately. For example, the buffer layer (BL), first gate insulating layer (GI), first interlayer insulating layer (IL1), and first protective layer (PV1) may be silicon oxide (SiO₂). x ), Silicon Nitride (SiN x ), Silicon Oxynitride (SiO₂ x N yIt may be formed into a double layer in which an inorganic layer comprising at least one of ) is stacked, or a multilayer in which the inorganic layers are stacked alternately.

[0167] A via insulating layer (VIA) may be disposed on the circuit element layer. Specifically, the via insulating layer (VIA) may be disposed on the first protective layer (PV1) of the circuit element layer. The via insulating layer (VIA) may include an organic insulating material, such as polyimide, to compensate for step differences caused by various wirings within the circuit element layer and to form a flat upper surface.

[0168] An internal bank (BP) is placed on the upper surface of the via insulating layer (VIA). In other words, the via insulating layer (VIA) and the internal bank (BP) can come into direct contact.

[0169] Internal banks (BP) may be placed on a via insulating layer (VIA). The internal banks (BP) may have inclined or curved sides with a certain curvature, and light emitted from a light-emitting element (ED) may be reflected from an alignment electrode (RME) placed on the internal banks (BP) and emitted to one side of a third direction (DR3). The internal banks (BP) may include an organic insulating material such as polyimide, but are not limited thereto.

[0170] An internal bank (BP) may include a first internal bank (BP1), a second internal bank (BP2), and a third internal bank (BP3). The second internal bank (BP2) may be positioned between the first internal bank (BP1) and the third internal bank (BP3).

[0171] A plurality of alignment electrodes (RME) may be disposed on an internal bank (BP) and a via insulating layer (VIA). A first alignment electrode (RME1) may be disposed on a first internal bank (BP1) and extend in a direction toward a second internal bank (BP2), and a second alignment electrode (RME2) may be disposed on a second internal bank (BP2) and extend in a direction toward the first internal bank (BP1) and a direction toward a third internal bank (BP3).

[0172] The first alignment electrode (RME1) may be disposed on the upper surface of a via insulating layer (VIA) located in the spaced-apart space between at least the inclined side of the first inner bank (BP1) and the inclined side of the first inner bank (BP1) and the second inner bank (BP2).

[0173] The second alignment electrode (RME2) may be disposed on the upper surface of a via insulating layer (VIA) located in the space between at least one inclined side of the second inner bank (BP2) and the first inner bank (BP1), and may be disposed on the upper surface of a via insulating layer (VIA) located in the space between the other inclined side of the second inner bank (BP2) and the third inner bank (BP3).

[0174] The third alignment electrode (RME3) may be placed on the upper surface of a via insulating layer (VIA) located in the spaced-apart space between at least the inclined side of the third inner bank (BP3) and the second inner bank (BP2).

[0175] The spacing between the first alignment electrode (RME1), the second alignment electrode (RME2), and the third alignment electrode (RME3), respectively, may be narrower than the spacing between the first internal bank (BP1), the second internal bank (BP2), and the third internal bank (BP3). Specifically, the spacing between the first alignment electrode (RME1) and the second alignment electrode (RME2) may be narrower than the spacing between the first internal bank (BP1) and the second internal bank (BP2), and the spacing between the second alignment electrode (RME2) and the third alignment electrode (RME3) may be narrower than the spacing between the second internal bank (BP2) and the third internal bank (BP3). At least some regions of the first alignment electrode (RME1), the second alignment electrode (RME2), and the third alignment electrode (RME3) may be placed directly on the via insulating layer (VIA) so that they may be placed on the same plane.

[0176] A light-emitting element (ED) placed between the inner banks (BP) emits light in both end directions, and the emitted light can be directed toward an alignment electrode (RME) placed on the inner bank. Accordingly, the light emitted from the light-emitting element (ED) can be reflected by the alignment electrode (RME) and emitted in a third direction (DR3).

[0177] As illustrated in FIG. 9, each alignment electrode (RME) can directly contact the third conductive layer through electrode contact holes (CTD, CTS) in the portion overlapping with the outer bank (BNL). The first electrode contact hole (CTD) may be formed in the area where the outer bank (BNL) and the first alignment electrode (RME1) overlap, and the second electrode contact hole (CTS) may be formed in the area where the outer bank (BNL) and the second alignment electrode (RME2) overlap. The first alignment electrode (RME1) can contact the first conductive pattern (CDP1) through the first electrode contact hole (CTD) penetrating the via insulating layer (VIA) and the first protective layer (PV1). The second alignment electrode (RME2) can contact the second voltage wiring (VL2) through the second electrode contact hole (CTS) penetrating the via insulating layer (VIA) and the first protective layer (PV1). The first alignment electrode (RME1) is electrically connected to the first transistor (TR1) through the first conduction pattern (CDP1) so that the first power supply voltage is applied, and the second electrode is electrically connected to the second voltage wiring (VL2) so that the second power supply voltage can be applied.

[0178] Alignment electrodes (RMEs) may include a highly reflective conductive material. For example, alignment electrodes (RMEs) may include metals such as silver (Ag), copper (Cu), aluminum (Al), etc., or alloys such as aluminum (Al), nickel (Ni), lanthanum (La), etc., or may have a structure in which a metal layer such as titanium (Ti), molybdenum (Mo), and niobium (Nb) is stacked with said alloy. In some embodiments, alignment electrodes (RMEs) may be composed of a double layer or a multilayer structure in which an alloy containing aluminum (Al) and at least one metal layer consisting of titanium (Ti), molybdenum (Mo), and niobium (Nb) are stacked.

[0179] However, not limited thereto, each alignment electrode (RME) may further include a transparent conductive material. For example, each alignment electrode (RME) may include a material such as ITO, IZO, ITZO, etc. In some embodiments, each alignment electrode (RME) may have a structure in which a transparent conductive material and a highly reflective metal layer are each stacked one or more times, or may be formed as a single layer including these. For example, each alignment electrode (RME) may have a stacked structure such as ITO / Ag / ITO / , ITO / Ag / IZO, or ITO / Ag / ITZO / IZO. The alignment electrodes (RME) are electrically connected to the light-emitting element (ED) and may reflect some of the light emitted from the light-emitting element (ED) toward the upper direction of the substrate (SUB).

[0180] The first insulating layer (PAS1) is placed on the front surface of the display area (DA) and may be placed on a via insulating layer (VIA) and a plurality of alignment electrodes (RME). The first insulating layer (PAS1) may include an insulating material to protect the plurality of alignment electrodes (RME) and simultaneously insulate different alignment electrodes (RME) from each other. Since the first insulating layer (PAS1) is placed to cover the alignment electrodes (RME) before the outer bank (BNL) is formed, the alignment electrodes (RME) can be prevented from being damaged during the process of forming the outer bank (BNL). Additionally, the first insulating layer (PAS1) may prevent the light-emitting element (ED) placed thereon from being damaged by direct contact with other components.

[0181] In an exemplary embodiment, the first insulating layer (PAS1) may have a step formed such that a portion of its upper surface is recessed between alignment electrodes (RME) spaced apart in a first direction (DR1). A light-emitting element (ED) is disposed on the upper surface of the first insulating layer (PAS1) where the step is formed, and a space may be formed between the light-emitting element (ED) and the first insulating layer (PAS1).

[0182] As illustrated in FIG. 9, the first insulating layer (PAS1) may include contact portions (CT1, CT2). The contact portions may each be arranged to overlap with different alignment electrodes (RME). For example, the contact portions may include first contact portions (CT1) arranged to overlap with the first alignment electrode (RME1), and second contact portions (CT2) arranged to overlap with the second alignment electrode (RME2). The first contact portions (CT1) and the second contact portions (CT2) may penetrate the first insulating layer (PAS1) to expose a portion of the upper surface of the first alignment electrode (RME1) or the second alignment electrode (RME2) below it. The first contact portions (CT1) and the second contact portions (CT2) may each further penetrate some of the other insulating layers placed on the first insulating layer (PAS1). The alignment electrode (RME) exposed by each contact part can come into contact with the connecting electrode (CNE).

[0183] An outer bank (BNL) may be placed on a first insulating layer (PAS1). The outer bank (BNL) includes a portion extending in a first direction (DR1) and a second direction (DR2) and may surround each pixel (PX). The outer bank (BNL) may surround each pixel (PX) and distinguish them, and may surround the outermost part of a display area (DA) and distinguish the display area (DA) from the non-display area (NDA).

[0184] The light-emitting elements (EDs) can be electrically connected to the circuit element layers under the alignment electrode (RME) and via insulating layer (VIA) by contacting the connecting electrodes (CNE), and can emit light of a specific wavelength range when an electrical signal is applied.

[0185] The outer bank (BNL) may have a certain height similar to the inner bank. In some embodiments, the height of the upper surface of the outer bank (BNL) may be higher than that of the inner bank (BP), and its thickness may be equal to or greater than that of the inner bank (BP). The outer bank (BNL) can effectively prevent ink from overflowing into adjacent pixels (PX) during the inkjet printing process in the manufacturing process of the display device (1) by defining a light-emitting region (EMA) by forming a rectangular partition in a planar shape. The outer bank (BNL) may include an organic insulating material such as polyimide, similar to the inner bank.

[0186] A second insulating layer (PAS2) may be disposed on a plurality of light-emitting elements (ED), a first insulating layer (PAS1), and an outer bank (BNL). The second insulating layer (PAS2) includes a pattern portion that extends in a first direction (DR1) between the inner banks and is disposed on the plurality of light-emitting elements (ED). The pattern portion is disposed to partially cover the outer surface of the light-emitting element (ED), and may not cover both sides or both ends of the light-emitting element (ED). The pattern portion may form a linear or island pattern within each pixel (PX) in a planar view. The pattern portion of the second insulating layer (PAS2) can protect the light-emitting element (ED) and, at the same time, fix the light-emitting element (ED) during the manufacturing process of the display device (1). Additionally, the second insulating layer (PAS2) may be disposed to fill the space between the light-emitting element (ED) and the first insulating layer (PAS1) below it. In addition, a portion of the second insulating layer (PAS2) may be placed on top of the outer bank (BNL).

[0187] As illustrated in FIG. 9, the second insulating layer (PAS2) may include contact portions (CT1, CT2). The second insulating layer (PAS2) may include a first contact portion (CT1) arranged to overlap with the first alignment electrode (RME1), and a second contact portion (CT2) arranged to overlap with the second alignment electrode (RME2). The contact portions may penetrate the second insulating layer (PAS2) in addition to the first insulating layer (PAS1). A plurality of first contact portions (CT1) and second contact portions (CT2) may each expose a portion of the upper surface of the first alignment electrode (RME1) or the second alignment electrode (RME2) below them.

[0188] Multiple connecting electrodes (CNE) can be placed on multiple alignment electrodes (RME) and internal banks (BP).

[0189] As shown in FIGS. 9 and FIGS. 10, the first connecting electrode (CNE1), the third connecting electrode (CNE3), and the fifth connecting electrode (CNE5) are each placed on the second insulating layer (PAS2) and can come into contact with light-emitting elements (ED).

[0190] The first connecting electrode (CNE1) partially overlaps with the first alignment electrode (RME1) and can come into contact with one end of the first light-emitting elements (ED1). As shown in FIG. 9, the first connecting electrode (CNE1) can be positioned to partially overlap with the first alignment electrode (RME1) and extend beyond the outer bank (BNL) from the light-emitting region (EMA). The first connecting electrode (CNE1) can come into contact with the first alignment electrode (RME1) through a first contact portion (CT1) that penetrates the first insulating layer (PAS1) and the second insulating layer (PAS2). Accordingly, the first connecting electrode (CNE1) can be electrically connected to the first transistor (TR1) so that a first power supply voltage can be applied.

[0191] As shown in FIGS. 10 and 11, the third connecting electrode (CNE3) may partially overlap with the second alignment electrode (RME2) and the third alignment electrode (RME3) to contact the other end of the second light-emitting elements (ED2) and one end of the third light-emitting elements (ED3). Specifically, the first part (CNE3a) of the third connecting electrode (CNE3) may partially overlap with the second alignment electrode (RME2) to contact the other end of the second light-emitting elements (ED2), and the second part (CNE3b) of the third connecting electrode (CNE3) may partially overlap with the third alignment electrode (RME3) to contact one end of the third light-emitting elements (ED3).

[0192] As shown in FIG. 10, the fifth connecting electrode (CNE5) partially overlaps with the third alignment electrode (RME3) and can be in contact with the other end of the fourth light-emitting elements (ED4). As shown in FIG. 9, the fifth connecting electrode (CNE5) partially overlaps with the third alignment electrode (RME3) and can be positioned to extend beyond the outer bank (BNL) from the light-emitting region (EMA). The fifth connecting electrode (CNE5) can be in contact with the third alignment electrode (RME3) through a second contact portion (CT2) that penetrates the first insulating layer (PAS1) and the second insulating layer (PAS2). Accordingly, the fifth connecting electrode (CNE5) is electrically connected to the second voltage wiring (VL2) so that the second power supply voltage can be applied.

[0193] A third insulating layer (PAS3) is disposed on the first connecting electrode (CNE1), the third connecting electrode (CNE3), the fifth connecting electrode (CNE5), and the second insulating layer (PAS2). The third insulating layer (PAS3) may be disposed entirely on the second insulating layer (PAS2) so that the third insulating layer (PAS3) covers the first connecting electrode (CNE1), the third connecting electrode (CNE3), and the fifth connecting electrode (CNE5). The second connecting electrode (CNE2) and the fourth connecting electrode (CNE4) may be disposed on the third insulating layer (PAS3). The third insulating layer (PAS3) may insulate the first connecting electrode (CNE1), the third connecting electrode (CNE3), and the fifth connecting electrode (CNE5) from each other so that they do not come into direct contact with the second connecting electrode (CNE2) and the fourth connecting electrode (CNE4).

[0194] The second connecting electrode (CNE2) and the fourth connecting electrode (CNE4) are each placed on the third insulating layer (PAS3) and can come into contact with light-emitting elements (ED).

[0195] As shown in FIGS. 10 and 11, the second connecting electrode (CNE2) partially overlaps with the first alignment electrode (RME1) and the second alignment electrode (RME2) and can come into contact with the other end of the first light-emitting elements (ED1) and one end of the second light-emitting elements (ED2).

[0196] As shown in FIGS. 10 and 11, the fourth connecting electrode (CNE4) partially overlaps with the second alignment electrode (RME2) and the third alignment electrode (RME3) and can come into contact with the other end of the third light-emitting elements (ED3) and one end of the fourth light-emitting elements (ED4).

[0197] Connecting electrodes (CNEs) may include a conductive material. For example, they may include ITO, IZO, ITZO, aluminum (Al), etc. As an example, the connecting electrode (CNE) may include a transparent conductive material, and light emitted from the light-emitting element (ED) may pass through the connecting electrode (CNE) and be emitted.

[0198] The first insulating layer (PAS1), the second insulating layer (PAS2), and the third insulating layer (PAS3) described above may each comprise an inorganic insulating material or an organic insulating material. In an exemplary embodiment, the first insulating layer (PAS1), the second insulating layer (PAS2), and the third insulating layer (PAS3) are each silicon oxide (SiO₂). x ), silicon nitride (SiN x ), and silicon oxynitride (SiO₂ x N y It may be any one of the following. The first insulating layer (PAS1), the second insulating layer (PAS2), and the third insulating layer (PAS3) may be made of the same material, some of which may be made of the same material and some of which may be made of different material, or each of which may be made of different material.

[0199] Hereinafter, another embodiment of the display device (1) according to one embodiment will be described. In the following embodiments, components identical to those in the previously described embodiment will be referred to by the same reference numerals, and redundant descriptions will be omitted or simplified, with the focus on the differences.

[0200] FIG. 12 is a plan view illustrating the structure of a pixel of a display device according to another embodiment. FIG. 13 is a plan view illustrating the arrangement of alignment electrodes of FIG. 12. FIG. 14 is a plan view illustrating the arrangement of connecting electrodes and light-emitting elements of FIG. 12.

[0201] Referring to FIGS. 12 to 14, the display device (1_1) according to the present embodiment illustrates that a plurality of channels (EDA1_1, EDA1_2, EDA1_3, EDA1_4) can be arranged in the shape of an inequality sign (<). The internal bank (BP_1), alignment electrode (RME_1), and connection electrode (CNE_1) included in the display device (1_1) according to the present embodiment can be arranged in correspondence with the shape in which the plurality of channels are arranged.

[0202] In FIG. 12, a fifth direction (DR5) is additionally defined. The fifth direction (DR5) may refer to a diagonal direction passing between the first direction (DR1) and the second direction (DR2). Specifically, with respect to FIG. 12, one side of the fifth direction (DR5) may refer to a direction pointing between one side of the first direction (DR1) and one side of the second direction (DR2), and the other side of the fifth direction (DR5) may refer to a direction pointing between the other side of the first direction (DR1) and the other side of the second direction (DR2). The fifth direction (DR5) is a direction on a plane formed by the first direction (DR1) and the second direction (DR2), and may be perpendicular to the third direction (DR3). The fifth direction (DR5) may intersect the fourth direction (DR4) on the same plane.

[0203] The inner banks (BP_1) are positioned within the light-emitting region (EMA) and may have a shape that is bent into a convex inequality sign (<) shape toward the other side of the first direction (DR1). The inner bank (BP_1) may include a first inner bank (BP1_1), a second inner bank (BP2_1), and a third inner bank (BP3_1).

[0204] Each of the first inner bank (BP1_1), the second inner bank (BP2_1), and the third inner bank (BP3_1) may have a portion extending in the fourth direction (DR4) and a portion extending in the fifth direction (DR5). By extending the first inner bank (BP1_1), the second inner bank (BP2_1), and the third inner bank (BP3_1) in the fourth direction (DR4) or the fifth direction (DR5), the spacing between the first inner bank (BP1_1), the second inner bank (BP2_1), and the third inner bank (BP3_1) may also extend in the fourth direction (DR4) or the fifth direction (DR5). Accordingly, a plurality of light-emitting elements (EDs) may also be arranged in the fourth direction (DR4) or the fifth direction (DR5).

[0205] A plurality of alignment electrodes (RME_1) may be disposed on an internal bank (BP_1). The alignment electrodes (RME_1) may include a first alignment electrode (RME1_1), a second alignment electrode (RME2_1), a third alignment electrode (RME3_1), and a fourth alignment electrode (RME4_1) that are spaced apart from each other. A first alignment electrode (RME1_1) may be disposed on the first internal bank (BP1_1), a second alignment electrode (RME2_1) and a third alignment electrode (RME3_1) may be disposed on the second internal bank (BP2_1), and a fourth alignment electrode (RME4_1) may be disposed on the third internal bank (BP3_1).

[0206] The first alignment electrode (RME1_1) may generally have a curved shape in the shape of an inequality sign (<) protruding toward the other side of the first direction (DR1). The first alignment electrode (RME1_1) may include a first part (RME1_1a) extending toward the second direction (DR2), a second part (RME1_1b) extending toward the fourth direction (DR4), a third part (RME1_1c) extending toward the fifth direction (DR5), and a fourth part (RME1_1d) extending toward the second direction (DR2).

[0207] A first portion (RME1_1a) of the first alignment electrode (RME1_1) may cross an outer bank (BNL) and a sub-region (SA) located on the upper side of the light-emitting region (EMA), i.e., on the other side of the second direction (DR2). The first portion (RME1_1a) may extend to a separation portion (ROP). The first portion (RME1_1a) may be electrically connected to the circuit element layer described above through a first electrode contact hole (CTD) penetrating the outer bank (BNL).

[0208] The second portion (RME1_1b) of the first alignment electrode (RME1_1) is a portion disposed in the light-emitting region (EMA) and can extend in the fourth direction (DR4) from the light-emitting region (EMA). The second portion (RME1_1b) can extend from one side of the second direction (DR2) of the first portion (RME1_1a) to the other side of the second direction (DR2) of the third portion (RME1_1c).

[0209] The third portion (RME1_1c) of the first alignment electrode (RME1_1) is a portion disposed in the light-emitting region (EMA) and can extend from the light-emitting region (EMA) to the fifth direction (DR5). The third portion (RME1_1c) can extend from one side of the second direction (DR2) of the second portion (RME1_1b) to the other side of the second direction (DR2) of the fourth portion (RME1_1d).

[0210] The fourth portion (RME1_1d) of the first alignment electrode (RME1_1) may cross the outer bank (BNL) and sub-region (SA) located on the lower side of the light-emitting region (EMA), i.e., on one side of the second direction (DR2). The fourth portion (RME1_1d) may extend to the separation portion (ROP).

[0211] The second alignment electrode (RME2_1) may generally have a curved shape in the shape of an inequality sign (<) protruding toward the other side of the first direction (DR1). The second alignment electrode (RME2_1) may include a first part (RME2_1a) extending toward the second direction (DR2), a second part (RME2_1b) extending toward the fourth direction (DR4), a third part (RME2_1c) extending toward the fifth direction (DR5), and a fourth part (RME2_1d) extending toward the second direction (DR2).

[0212] The first portion (RME2_1a) of the second alignment electrode (RME2_1) may cross the outer bank (BNL) and sub-region (SA) positioned on the upper side of the light-emitting region (EMA), i.e., on the other side of the second direction (DR2). The first portion (RME2_1a) may extend to the separation portion (ROP).

[0213] The second portion (RME2_1b) of the second alignment electrode (RME2_1) is a portion disposed in the light-emitting region (EMA) and can extend in the fourth direction (DR4) from the light-emitting region (EMA). The second portion (RME2_1b) can extend from one side of the second direction (DR2) of the first portion (RME2_1a) to the other side of the second direction (DR2) of the third portion (RME2_1c).

[0214] The third portion (RME2_1c) of the second alignment electrode (RME2_1) is a portion disposed in the light-emitting region (EMA) and can extend from the light-emitting region (EMA) to the fifth direction (DR5). The third portion (RME2_1c) can extend from one side of the second direction (DR2) of the second portion (RME2_1b) to the other side of the second direction (DR2) of the fourth portion (RME2_1d).

[0215] The fourth portion (RME2_1d) of the second alignment electrode (RME2_1) may cross the outer bank (BNL) and sub-region (SA) located on the lower side of the light-emitting region (EMA), i.e., on one side of the second direction (DR2). The fourth portion (RME2_1d) may extend to the separation portion (ROP).

[0216] The third alignment electrode (RME3_1) may generally have a curved shape in the shape of an inequality sign (<) protruding toward the other side of the first direction (DR1). The third alignment electrode (RME3_1) may include a first part (RME3_1a) extending toward the second direction (DR2), a second part (RME3_1b) extending toward the fourth direction (DR4), a third part (RME3_1c) extending toward the fifth direction (DR5), and a fourth part (RME3_1d) extending toward the second direction (DR2).

[0217] The first portion (RME3_1a) of the third alignment electrode (RME3_1) may cross the outer bank (BNL) and sub-region (SA) positioned above the light-emitting region (EMA), i.e., on the other side of the second direction (DR2). The first portion (RME3_1a) may extend to the separation portion (ROP).

[0218] The second portion (RME3_1b) of the third alignment electrode (RME3_1) is a portion disposed in the light-emitting region (EMA) and can extend from the light-emitting region (EMA) to the fourth direction (DR4). The second portion (RME3_1b) can extend from one side of the second direction (DR2) of the first portion (RME3_1a) to the other side of the second direction (DR2) of the third portion (RME3_1c).

[0219] The third portion (RME3_1c) of the third alignment electrode (RME3_1) is a portion disposed in the light-emitting region (EMA) and can extend from the light-emitting region (EMA) to the fifth direction (DR5). The third portion (RME3_1c) can extend from one side of the second direction (DR2) of the second portion (RME3_1b) to the other side of the second direction (DR2) of the fourth portion (RME3_1d).

[0220] The fourth portion (RME3_1d) of the third alignment electrode (RME3_1) may cross the outer bank (BNL) and sub-region (SA) located on the lower side of the light-emitting region (EMA), i.e., on one side of the second direction (DR2). The fourth portion (RME3_1d) may extend to the separation portion (ROP).

[0221] The fourth alignment electrode (RME4_1) may generally have a curved shape in the shape of an inequality sign (<) protruding toward the other side of the first direction (DR1). The fourth alignment electrode (RME4_1) may include a first part (RME4_1a) extending toward the second direction (DR2), a second part (RME4_1b) extending toward the fourth direction (DR4), a third part (RME4_1c) extending toward the fifth direction (DR5), and a fourth part (RME4_1d) extending toward the second direction (DR2).

[0222] The first portion (RME4_1a) of the fourth alignment electrode (RME4_1) may cross the outer bank (BNL) and sub-region (SA) positioned on the upper side of the light-emitting region (EMA), i.e., on the other side of the second direction (DR2). The first portion (RME4_1a) may extend to the separation portion (ROP).

[0223] The second portion (RME4_1b) of the fourth alignment electrode (RME4_1) is a portion disposed in the light-emitting region (EMA) and can extend from the light-emitting region (EMA) to the fourth direction (DR4). The second portion (RME4_1b) can extend from one side of the second direction (DR2) of the first portion (RME4_1a) to the other side of the second direction (DR2) of the third portion (RME4_1c).

[0224] The third portion (RME4_1c) of the fourth alignment electrode (RME4_1) is a portion disposed in the light-emitting region (EMA) and can extend from the light-emitting region (EMA) to the fifth direction (DR5). The third portion (RME4_1c) can extend from one side of the second direction (DR2) of the second portion (RME4_1b) to the other side of the second direction (DR2) of the fourth portion (RME4_1d).

[0225] The fourth portion (RME4_1d) of the fourth alignment electrode (RME4_1) may cross the outer bank (BNL) and sub-region (SA) located on the lower side of the light-emitting region (EMA), i.e., on one side of the second direction (DR2). The fourth portion (RME4_1d) may extend to the separation portion (ROP). The fourth portion (RME4_1d) may be electrically connected to the circuit element layer described above through a second electrode contact hole (CTD) penetrating the outer bank (BNL).

[0226] As illustrated in FIG. 13, the first alignment electrode (RME1_1), the second alignment electrode (RME2_1), the third alignment electrode (RME3_1), and the fourth alignment electrode (RME4_1) are spaced apart from each other in a first direction (DR1), and within the light-emitting region (EMA), the space between the first alignment electrode (RME1_1) and the second alignment electrode (RME2_1) and the space between the third alignment electrode (RME3_1) and the fourth alignment electrode (RME4_1) can define paths (EDA1_1, EDA2_1, EDA3_1, EDA4_1) in which light-emitting elements (ED) are arranged.

[0227] Specifically, a first channel (EDA1_1) is disposed in the spaced-apart area between the first part (RME1_1a) of the first alignment electrode (RME1_1) and the first part (RME2_1a) of the second alignment electrode (RME2_1), a second channel (EDA2_1) is disposed in the spaced-apart area between the second part (RME1_1b) of the first alignment electrode (RME1_1) and the second part (RME2_1b) of the second alignment electrode (RME2_1), a third channel (EDA3_1) is disposed in the spaced-apart area between the first part (RME3_1a) of the third alignment electrode (RME3_1) and the first part (RME4_1a) of the fourth alignment electrode (RME4_1), and a second channel (EDA3_1) is disposed in the spaced-apart area between the second part (RME3_1b) of the third alignment electrode (RME3_1) and the second part (RME4_1) of the fourth alignment electrode (RME4_1). A fourth lane (EDA4_1) can be placed in the gap between the parts (RME4_1b).

[0228] Accordingly, the first channel (EDA1_1) and the third channel (EDA3_1) may be extended in the fourth direction (DR4), and the second channel (EDA2_1) and the fourth channel (EDA4_1) may be extended in the fifth direction (DR5). The space between the first channel (EDA1_1) and the second channel (EDA2_1) may be a space where the first part (CNE2_1a) of the second connecting electrode (CNE2_1), described later, is placed, and the space between the third channel (EDA3_1) and the fourth channel (EDA4_1) may be a space where the first part (CNE4_1a) of the fourth connecting electrode (CNE4_1), described later, is placed. The spacing between the first lane (EDA1_1) and the second lane (EDA2_1), and the spacing between the third lane (EDA3_1) and the fourth lane (EDA4_1), may be located in the center of the light emission region (EMA).

[0229] When a first electrical signal is applied to the first alignment electrode (RME1_1) and the third alignment electrode (RME3_1), and a second electrical signal is applied to the second alignment electrode (RME2_1) and the fourth alignment electrode (RME4_1), one end of each of the light-emitting elements (ED) may be arranged in the first alignment electrode (RME1_1) and the third alignment electrode (RME3_1), and the other end of each of the light-emitting elements (ED) may be arranged in the second alignment electrode (RME2_1) and the fourth alignment electrode (RME4_1). Accordingly, one end (ED1a) of the first light-emitting element (ED1) is placed on the first alignment electrode (RME1_1), and the other end (ED1b) of the first light-emitting element (ED1) is placed on the second alignment electrode (RME2_1); one end (ED2a) of the second light-emitting element (ED2) is placed on the first alignment electrode (RME1_1), and the other end (ED2b) of the second light-emitting element (ED2) is placed on the second alignment electrode (RME2_1); one end (ED3a) of the third light-emitting element (ED3) is placed on the third alignment electrode (RME3_1), and the other end (ED3b) of the third light-emitting element (ED3) is placed on the fourth alignment electrode (RME4_1); one end (ED4a) of the fourth light-emitting element (ED4) is placed on the third alignment electrode (RME3_1), and the other end (ED4b) of the fourth light-emitting element (ED4) is placed on the fourth It can be placed on the alignment electrode (RME4_1).

[0230] One end and the other end of different light-emitting elements (ED) can be electrically connected by a connecting electrode (CNE_1).

[0231] A connecting electrode (CNE_1) may be placed on a light-emitting element (ED). The connecting electrode (CNE_1) may include a first connecting electrode (CNE1_1), a second connecting electrode (CNE2_1), a third connecting electrode (CNE3_1), a fourth connecting electrode (CNE4_1), and a fifth connecting electrode (CNE5_1) that are spaced apart from each other.

[0232] The first connecting electrode (CNE1_1) may include a first portion (CNE1_1a) extending generally in the second direction (DR2) and a second portion (CNE1_1b) extending in the fourth direction (DR4) in the light-emitting region (EMA).

[0233] The first part (CNE1_1a) of the first connecting electrode (CNE1_1) is positioned on the other side of the second direction (DR2) of the light-emitting region (EMA) and overlaps with the first alignment electrode (RME1_1) in the third direction (DR3), and can be electrically connected to each other through the first contact part (CT1).

[0234] The second portion (CNE1_1b) of the first connecting electrode (CNE1_1) may be in contact with one end (ED1a) of each of the first light-emitting elements (ED1). The second portion (CNE1_1b) may be extended in the fourth direction (DR4) and may be extended to the portion where the first channel (EDA1_1) is arranged. In other words, the second portion (CNE1_1b) may be extended only to the vicinity of the center of the light-emitting region (EMA), that is, to the vicinity where the first light-emitting elements (ED1) are arranged.

[0235] The second connecting electrode (CNE2_1) may generally have a curved shape in the shape of an inequality sign (<) protruding toward the other side of the first direction (DR1). The second connecting electrode (CNE2_1) may serve to electrically connect the other end (ED1b) of the first light-emitting element (ED1) and one end (ED2a) of the second light-emitting element (ED2). The second connecting electrode (CNE2_1) may include a first part (CNE2_1a) extending toward the fourth direction (DR4) and a second part (CNE2_1b) extending toward the fifth direction (DR5).

[0236] The first portion (CNE2_1a) of the second connecting electrode (CNE2_1) may be in contact with the other end (ED1b) of each of the first light-emitting elements (ED1). The first portion (CNE2_1a) may be extended in the fourth direction (DR4) to the vicinity where the second portion (CNE1_1b) of the first connecting electrode (CNE1_1) extends, that is, to the vicinity where the first light-emitting elements (ED1) are arranged. The first portion (CNE2_1a) may be connected to the second portion (CNE2_1b) across the gap between the first channel (EDA1_1) and the second channel (EDA2_1) described above.

[0237] The second portion (CNE2_1b) of the second connecting electrode (CNE2_1) can be in contact with one end (ED2a) of each of the second light-emitting elements (ED2). The second portion (CNE2_1b) can be extended in the fifth direction (DR5) to the vicinity where the second light-emitting elements (ED2) are arranged within the light-emitting region (EMA).

[0238] The third connecting electrode (CNE3_1) can serve to electrically connect the other end (ED2b) of the second light-emitting element (ED2) and one end (ED3a) of the third light-emitting element (ED3). The third connecting electrode (CNE3_1) may include a first part (CNE3_1a) extending in the fifth direction (DR5), a second part (CNE3_1b) extending in the fourth direction (DR4), and a connecting part (CNE3_1c) connecting the first part (CNE3_1a) and the second part (CNE3_1b).

[0239] The first portion (CNE3_1a) of the third connecting electrode (CNE3_1) may be in contact with the other end (ED2b) of each of the second light-emitting elements (ED2). The first portion (CNE3_1a) may be extended in the fifth direction (DR5) to the vicinity where the second light-emitting elements (ED2) are arranged within the light-emitting region (EMA). In other words, the first portion (CNE3_1a) of the third connecting electrode (CNE3_1) may be extended to the vicinity where the second portion (CNE2_1b) of the second connecting electrode (CNE2_1) is placed.

[0240] The second portion (CNE3_1b) of the third connecting electrode (CNE3_1) can be in contact with one end (ED3a) of each of the third light-emitting elements (ED3). The second portion (CNE3_1b) can be extended in a fourth direction (DR4) to the vicinity where the third light-emitting elements (ED3) are arranged within the light-emitting region (EMA).

[0241] The connecting portion (CNE3_1c) of the third connecting electrode (CNE3_1) can serve to connect the first portion (CNE3_1a) and the second portion (CNE3_1b). Specifically, the third connecting electrode (CNE3_1) can connect the other side of the second direction (DR2) of the first portion (CNE3_1a) and one side of the second direction (DR2) of the second portion (CNE3_2b). The third connecting electrode (CNE3_1) can extend in a direction intersecting the fourth direction (DR4) or the fifth direction (DR5) to connect the first portion (CNE3_1a) and the second portion (CNE3_1b). In some embodiments, the connecting portion (CNE3_1c) may be located in the center of the light-emitting region (EMA).

[0242] The fourth connecting electrode (CNE4_1) may generally have a curved shape in the form of an inequality sign (<) protruding toward the other side of the first direction (DR1). The fourth connecting electrode (CNE4_1) may serve to electrically connect the other end (ED3b) of the third light-emitting element (ED3) and one end (ED4a) of the fourth light-emitting element (ED4). The fourth connecting electrode (CNE4_1) may include a first part (CNE4_1a) extending toward the fourth direction (DR4) and a second part (CNE4_1b) extending toward the fifth direction (DR5).

[0243] The first portion (CNE4_1a) of the fourth connecting electrode (CNE4_1) may be in contact with the other end (ED3b) of each of the third light-emitting elements (ED3). The first portion (CNE4_1a) may be extended in the fourth direction (DR4) to the vicinity where the second portion (CNE3_1b) of the third connecting electrode (CNE3_1) extends, that is, to the vicinity where the third light-emitting elements (ED3) are arranged. The first portion (CNE4_1a) may be connected to the second portion (CNE4_2a) across the gap between the aforementioned third channel (EDA3_1) and the fourth channel (EDA4_1).

[0244] The second portion (CNE4_1b) of the fourth connecting electrode (CNE4_1) can be in contact with one end (ED4a) of each of the fourth light-emitting elements (ED4). The second portion (CNE4_1b) can be extended in the fifth direction (DR5) to the vicinity where the fourth light-emitting elements (ED4) are arranged within the light-emitting region (EMA).

[0245] The fifth connecting electrode (CNE5_1) may include a first portion (CNE5_1a) extending generally in the second direction (DR2) and a second portion (CNE5_1b) extending in the fifth direction (DR5) in the light-emitting region (EMA).

[0246] The first part (CNE5_1a) of the fifth connecting electrode (CNE5_1) overlaps with the fourth alignment electrode (RME4_1) in the third direction (DR3) and can be electrically connected to each other through the second contact part (CT2).

[0247] The second portion (CNE5_1b) of the fifth connecting electrode (CNE5_1) may come into contact with the other end (ED1b) of each of the fourth light-emitting elements (ED4). The second portion (CNE5_1b) may extend in the fifth direction (DR5) and may extend to the portion where the fourth path (EDA4_1) is arranged. In other words, the second portion (CNE5_1b) may extend only to the vicinity of the center of the light-emitting region (EMA), that is, to the vicinity where the fourth light-emitting elements (ED4) are arranged.

[0248] Similar to the case of the display device (1) according to one embodiment, the length of the fourth direction (DR4) of each of the first channel (EDA1_1), second channel (EDA2_1), third channel (EDA3_1) and fourth channel (EDA4_1) according to this embodiment may be equal to or greater than half the length of the second direction (DR2) of the long side (EDAb) of the light-emitting region (EDA). Specifically, the length of the fourth direction (DR4) (L1_1) of the first channel (EDA1_1), the length of the fifth direction (DR5) (L2_1) of the second channel (EDA2_1), the length of the fourth direction (DR4) (L3_1) of the third channel (EDA3_1), and the length of the fifth direction (DR5) (L4_1) of the fourth channel (EDA4_1) may be equal to or greater than the length of the first width (H1).

[0249] In addition, the length of the fourth direction (DR4) (L1_1) of the first channel (EDA1_1), the length of the fifth direction (DR5) (L2_1) of the second channel (EDA2_1), the length of the fourth direction (DR4) (L3_1) of the third channel (EDA3_1), and the length of the fifth direction (DR5) (L4_1) of the fourth channel (EDA4_1) may each be 44 μm or more.

[0250] With the configuration described above, the number of light-emitting elements (EDs) that provide the minimum light-emitting efficiency required by the display device can be easily secured while freely arranging the light-emitting elements (EDs).

[0251] FIG. 15 is a plan view illustrating the structure of a pixel of a display device according to another embodiment. FIG. 16 is a plan view illustrating the arrangement of alignment electrodes of FIG. 15. FIG. 17 is a plan view illustrating the arrangement of connecting electrodes and light-emitting elements of FIG. 15.

[0252] Referring to FIGS. 15 to 17, the display device (1_2) according to the present embodiment illustrates that each of the plurality of channels (EDA1_2, EDA2_2, EDA3_2, EDA4_2) in which a light-emitting element (ED) is arranged can be bent at least once. The internal bank (BP_2), alignment electrode (RME_2), and connection electrode (CNE_2) included in the display device (1_2) according to the present embodiment can be arranged in correspondence with the shape in which the plurality of channels are arranged.

[0253] The inner banks (BP_2) are positioned within the light-emitting region (EMA) and may have a shape that is bent twice in the shape of an inequality sign (<) that is convex toward the other side of the first direction (DR1). The inner banks (BP_2) may include a first inner bank (BP1_2), a second inner bank (BP2_2), and a third inner bank (BP3_2).

[0254] Each of the first inner bank (BP1_2), the second inner bank (BP2_2), and the third inner bank (BP3_2) may have a portion extending in the fourth direction (DR4) and a portion extending in the fifth direction (DR5).

[0255] By extending the first inner bank (BP1_2), the second inner bank (BP2_2), and the third inner bank (BP3_2) into the fourth direction (DR4) or the fifth direction (DR5), the spacing between the first inner bank (BP1_2), the second inner bank (BP2_2), and the third inner bank (BP3_2) can also be extended into the fourth direction (DR4) or the fifth direction (DR5). Accordingly, a plurality of light-emitting elements (ED) can also be arranged in the fourth direction (DR4) or the fifth direction (DR5).

[0256] A plurality of alignment electrodes (RME_2) may be disposed on an internal bank (BP_2). The alignment electrodes (RME_2) may include a first alignment electrode (RME1_2), a second alignment electrode (RME2_2), a third alignment electrode (RME3_2), and a fourth alignment electrode (RME4_2) that are spaced apart from each other. A first alignment electrode (RME1_2) may be disposed on the first internal bank (BP1_2), a second alignment electrode (RME2_2) and a third alignment electrode (RME3_2) may be disposed on the second internal bank (BP2_2), and a fourth alignment electrode (RME4_2) may be disposed on the third internal bank (BP3_2).

[0257] The first alignment electrode (RME1_2) may generally have a shape that is bent twice in the shape of an inequality sign (<) protruding to the other side of the first direction (DR1). The first alignment electrode (RME1_2) may include a first part (RME1_2a) extending in the second direction (DR2), a second part (RME1_2b) bent in the shape of an inequality sign (<), a third part (RME1_2c) bent in the shape of an inequality sign (<), and a fourth part (RME1_2d) extending in the second direction (DR2).

[0258] The description of the first part (RME1_2a) and the fourth part (RME1_2d) of the first alignment electrode (RME1_2) is substantially the same as the description of the first part (RME1_1a) and the fourth part (RME1_1d) of the first alignment electrode (RME1_1) according to the embodiment of FIG. 12, so the description thereof will be omitted.

[0259] The second part (RME1_2b) of the first alignment electrode (RME1_2) is a part disposed in the light-emitting region (EMA) and may have a shape that is bent twice in the shape of an inequality sign (<) protruding toward the other side of the first direction (DR1). Specifically, the second part (RME1_2b) may include a first inclined portion (RME1_2ba) extending toward the fourth direction (DR4) from the light-emitting region (EMA) and a second inclined portion (RME1_2bb) extending toward the fifth direction (DR5).

[0260] The third portion (RME1_2c) of the first alignment electrode (RME1_2) is a portion disposed in the light-emitting region (EMA) and may have a curved shape in the shape of an inequality sign (<) protruding toward the other side of the first direction (DR1). Specifically, the third portion (RME1_2c) may include a first inclined portion (RME1_2ca) extending toward the fourth direction (DR4) from the light-emitting region (EMA) and a second inclined portion (RME1_2cb) extending toward the fifth direction (DR5).

[0261] The second alignment electrode (RME2_2) may generally have a shape that is bent twice in the shape of an inequality sign (<) protruding to the other side of the first direction (DR1). The second alignment electrode (RME2_2) may include a first part (RME2_2a) extending in the second direction (DR2), a second part (RME2_2b) bent in the shape of an inequality sign (<), a third part (RME2_2c) bent in the shape of an inequality sign (<), and a fourth part (RME2_2d) extending in the second direction (DR2).

[0262] The description of the first part (RME2_2a) and the fourth part (RME2_2d) of the second alignment electrode (RME2_2) is substantially the same as the description of the first part (RME2_1a) and the fourth part (RME2_1d) of the second alignment electrode (RME2_1) according to the embodiment of FIG. 12, so the description thereof will be omitted.

[0263] The second part (RME2_2b) of the second alignment electrode (RME2_2) is a part disposed in the light-emitting region (EMA) and may have a shape that is bent twice in the shape of an inequality sign (<) protruding toward the other side of the first direction (DR1). Specifically, the second part (RME2_2b) may include a first inclined portion (RME2_2ba) extending toward the fourth direction (DR4) from the light-emitting region (EMA) and a second inclined portion (RME2_2bb) extending toward the fifth direction (DR5).

[0264] The third part (RME2_2c) of the second alignment electrode (RME2_2) is a part disposed in the light-emitting region (EMA) and may have a curved shape in the shape of an inequality sign (<) protruding toward the other side of the first direction (DR1). Specifically, the third part (RME2_2c) may include a first inclined portion (RME2_2ca) extending toward the fourth direction (DR4) from the light-emitting region (EMA) and a second inclined portion (RME2_2cb) extending toward the fifth direction (DR5).

[0265] The third alignment electrode (RME3_2) may generally have a shape that is bent twice in the shape of an inequality sign (<) protruding to the other side of the first direction (DR1). The third alignment electrode (RME3_2) may include a first part (RME3_2a) extending in the second direction (DR2), a second part (RME3_2b) bent in the shape of an inequality sign (<), a third part (RME3_2c) bent in the shape of an inequality sign (<), and a fourth part (RME3_2d) extending in the second direction (DR2).

[0266] The description of the first part (RME3_2a) and the fourth part (RME3_2d) of the third alignment electrode (RME3_2) is substantially the same as the description of the first part (RME3_1a) and the fourth part (RME3_1d) of the third alignment electrode (RME3_1) according to the embodiment of FIG. 12, so the description thereof will be omitted.

[0267] The second portion (RME3_2b) of the third alignment electrode (RME3_2) is a portion disposed in the light-emitting region (EMA) and may have a shape that is bent twice in the shape of an inequality sign (<) protruding toward the other side of the first direction (DR1). Specifically, the second portion (RME3_2b) may include a first inclined portion (RME3_2ba) extending toward the fourth direction (DR4) from the light-emitting region (EMA) and a second inclined portion (RME3_2bb) extending toward the fifth direction (DR5).

[0268] The third part (RME3_2c) of the third alignment electrode (RME3_2) is a part disposed in the light-emitting region (EMA) and may have a curved shape in the shape of an inequality sign (<) protruding toward the other side of the first direction (DR1). Specifically, the third part (RME3_2c) may include a first inclined portion (RME3_2ca) extending toward the fourth direction (DR4) from the light-emitting region (EMA) and a second inclined portion (RME3_2cb) extending toward the fifth direction (DR5).

[0269] The fourth alignment electrode (RME4_2) may generally have a shape that is bent twice in the shape of an inequality sign (<) protruding to the other side of the first direction (DR1). The fourth alignment electrode (RME4_2) may include a first part (RME4_2a) extending in the second direction (DR2), a second part (RME4_2b) bent in the shape of an inequality sign (<), a third part (RME4_2c) bent in the shape of an inequality sign (<), and a fourth part (RME4_2d) extending in the second direction (DR2).

[0270] The description of the first part (RME4_2a) and the fourth part (RME4_2d) of the fourth alignment electrode (RME4_2) is substantially the same as the description of the first part (RME4_1a) and the fourth part (RME4_1d) of the fourth alignment electrode (RME4_1) according to the embodiment of FIG. 12, so the description thereof will be omitted.

[0271] The second part (RME4_2b) of the fourth alignment electrode (RME4_2) is a part disposed in the light-emitting region (EMA) and may have a shape that is bent twice in the shape of an inequality sign (<) protruding toward the other side of the first direction (DR1). Specifically, the second part (RME4_2b) may include a first inclined portion (RME4_2ba) extending toward the fourth direction (DR4) from the light-emitting region (EMA) and a second inclined portion (RME4_2bb) extending toward the fifth direction (DR5).

[0272] The third part (RME4_2c) of the second alignment electrode (RME4_2) is a part disposed in the light-emitting region (EMA) and may have a curved shape in the shape of an inequality sign (<) protruding toward the other side of the first direction (DR1). Specifically, the third part (RME4_2c) may include a first inclined portion (RME4_2ca) extending toward the fourth direction (DR4) from the light-emitting region (EMA) and a second inclined portion (RME4_2cb) extending toward the fifth direction (DR5).

[0273] As shown in FIG. 16, the first alignment electrode (RME1_2), the second alignment electrode (RME2_2), the third alignment electrode (RME3_2), and the fourth alignment electrode (RME4_2) are spaced apart from each other in a first direction (DR1), and within the light-emitting region (EMA), the spaced-out space between the first alignment electrode (RME1_2) and the second alignment electrode (RME2_2) and the spaced-out space between the third alignment electrode (RME3_2) and the fourth alignment electrode (RME4_2) can define paths (EDA1_2, EDA2_2, EDA3_2, EDA4_2) in which light-emitting elements (ED) are arranged.

[0274] Specifically, a first channel (EDA1_2) is disposed in the spaced-apart area between the first part (RME1_2a) of the first alignment electrode (RME1_2) and the first part (RME2_2a) of the second alignment electrode (RME2_2), a second channel (EDA2_2) is disposed in the spaced-apart area between the second part (RME1_2b) of the first alignment electrode (RME1_2) and the second part (RME2_2b) of the second alignment electrode (RME2_2), a third channel (EDA3_2) is disposed in the spaced-apart area between the first part (RME3_2a) of the third alignment electrode (RME3_2) and the first part (RME4_2a) of the fourth alignment electrode (RME4_2), and a second channel (EDA3_2) is disposed in the spaced-apart area between the second part (RME3_2b) of the third alignment electrode (RME3_2) and the second part (RME4_2) of the fourth alignment electrode (RME4_2). A fourth lane (EDA4_2) can be placed in the gap between the parts (RME4_2b).

[0275] Accordingly, the first channel (EDA1_2), the second channel (EDA2_2), the third channel (EDA3_2), and the fourth channel (EDA4_2) may have an inequality sign (<) shape that is convex toward the other side of the first direction (DR1), including a portion extending toward the fourth direction (DR4) and a portion extending toward the fifth direction (DR5). The space between the first channel (EDA1_2) and the second channel (EDA2_2) is a space where the first inclined portion (CNE2_2ba) of the second connecting electrode (CNE2_2), described later, is placed, and the space between the third channel (EDA3_2) and the fourth channel (EDA4_2) may be a space where the first inclined portion (CNE4_2ba) of the fourth connecting electrode (CNE4_2), described later, is placed. The spacing between the first lane (EDA1_2) and the second lane (EDA2_2), and the spacing between the third lane (EDA3_2) and the fourth lane (EDA4_2), may be located in the center of the light emission region (EMA).

[0276] The orientation relationship of the light-emitting element (ED) of the display device (1_2) according to the present embodiment is substantially the same as the orientation relationship of the light-emitting element (ED) of the display device (1_1) according to the embodiment of FIG. 12, so a description thereof will be omitted.

[0277] A connecting electrode (CNE_2) may be placed on a light-emitting element (ED). The connecting electrode (CNE_2) may include a first connecting electrode (CNE1_2), a second connecting electrode (CNE2_2), a third connecting electrode (CNE3_2), a fourth connecting electrode (CNE4_2), and a fifth connecting electrode (CNE5_2) that are spaced apart from each other.

[0278] The first connecting electrode (CNE1_2) may include a first portion (CNE1_2a) that generally extends in the second direction (DR2) and a second portion (CNE1_2b) that has a convex inequality sign (<) shape toward the other side of the first direction (DR1) in the light-emitting region (EMA).

[0279] The first part (CNE1_2a) of the first connecting electrode (CNE1_2) overlaps with the first alignment electrode (RME1_2) in the third direction (DR3) and can be electrically connected to each other through the first contact part (CT1).

[0280] A second portion (CNE1_2b) of the first connecting electrode (CNE1_2) may be in contact with one end (ED1a) of each of the first light-emitting elements (ED1). The second portion (CNE1_2b) may include a first inclined portion (CNE1_2ba) extending in a fourth direction (DR4) and a second inclined portion (CNE1_2bb) extending in a fifth direction (DR5).

[0281] The second connecting electrode (CNE2_2) may generally have a shape that is bent twice in the shape of an inequality sign (<) protruding toward the other side of the first direction (DR1). The second connecting electrode (CNE2_2) may serve to electrically connect the other end (ED1b) of the first light-emitting element (ED1) and one end (ED2a) of the second light-emitting element (ED2). The second connecting electrode (CNE2_2) may include a first part (CNE2_2a) that is bent in the shape of an inequality sign (<) protruding toward the other side of the first direction (DR1), and a second part (CNE2_2b) that is bent in the shape of an inequality sign (<) protruding toward the other side of the first direction (DR1).

[0282] A first portion (CNE2_2a) of the second connecting electrode (CNE2_2) may be in contact with the other end (ED1b) of each of the first light-emitting elements (ED1). The first portion (CNE2_2a) may include a first inclined portion (CNE2_2aa) extending in a fourth direction (DR4) and a second inclined portion (CNE2_2ab) extending in a fifth direction (DR5).

[0283] The second portion (CNE2_2b) of the second connecting electrode (CNE2_2) may be in contact with one end (ED2a) of each of the second light-emitting elements (ED2). The second portion (CNE2_2b) may include a first inclined portion (CNE2_2ba) extending in a fourth direction (DR4) and a second inclined portion (CNE2_2bb) extending in a fifth direction (DR5).

[0284] The first slope portion (CNE2_2ba) of the second portion (CNE2_2b) can be connected to the first portion (CNE2_2a) across the gap between the first lane (EDA1_2) and the second lane (EDA2_2) described above.

[0285] The third connecting electrode (CNE3_2) can serve to electrically connect the other end (ED2b) of the second light-emitting element (ED2) and one end (ED3a) of the third light-emitting element (ED3). The third connecting electrode (CNE3_2) may include a first part (CNE3_2a) that is bent in the shape of an inequality sign (<) protruding toward the other side of the first direction (DR1), a second part (CNE3_2b) that is bent in the shape of an inequality sign (<) protruding toward the other side of the first direction (DR1), and a connecting part (CNE3_2c) that connects the first part (CNE3_2a) and the second part (CNE3_2b).

[0286] A first portion (CNE3_2a) of the third connecting electrode (CNE3_2) may contact the other end (ED2b) of each of the second light-emitting elements (ED2). The first portion (CNE3_2a) may include a first inclined portion (CNE3_2aa) extending in a fourth direction (DR4) and a second inclined portion (CNE3_2ab) extending in a fifth direction (DR5).

[0287] The second portion (CNE3_2b) of the third connecting electrode (CNE3_2) may be in contact with one end (ED3a) of each of the third light-emitting elements (ED3). The second portion (CNE3_2b) may include a first inclined portion (CNE3_2ba) extending in a fourth direction (DR4) and a second inclined portion (CNE3_2bb) extending in a fifth direction (DR5).

[0288] The connecting portion (CNE3_2c) of the third connecting electrode (CNE3_2) may serve to connect the first portion (CNE3_2a) and the second portion (CNE3_2b). The third connecting electrode (CNE3_2) may extend in a direction intersecting the fourth direction (DR4) or the fifth direction (DR5) to connect the first portion (CNE3_2a) and the second portion (CNE3_2b). In some embodiments, the connecting portion (CNE3_2c) may be located in the center of the light-emitting region (EMA).

[0289] The fourth connecting electrode (CNE4_2) may generally have a shape that is bent twice in the shape of an inequality sign (<) protruding toward the other side of the first direction (DR1). The second connecting electrode (CNE4_2) may serve to electrically connect the other end (ED3b) of the third light-emitting element (ED3) and one end (ED4a) of the fourth light-emitting element (ED4). The fourth connecting electrode (CNE4_2) may include a first part (CNE4_2a) that is bent in the shape of an inequality sign (<) protruding toward the other side of the first direction (DR1), and a second part (CNE4_2b) that is bent in the shape of an inequality sign (<) protruding toward the other side of the first direction (DR1).

[0290] A first portion (CNE4_2a) of the fourth connecting electrode (CNE4_2) may contact the other end (ED3b) of each of the third light-emitting elements (ED3). The first portion (CNE4_2a) may include a first inclined portion (CNE4_2aa) extending in the fourth direction (DR4) and a second inclined portion (CNE4_2ab) extending in the fifth direction (DR5).

[0291] The second portion (CNE4_2b) of the fourth connecting electrode (CNE4_2) may be in contact with one end (ED4a) of each of the fourth light-emitting elements (ED4). The second portion (CNE4_2b) may include a first inclined portion (CNE4_2ba) extending in the fourth direction (DR4) and a second inclined portion (CNE4_2bb) extending in the fifth direction (DR5).

[0292] The first slope portion (CNE4_2ba) of the second portion (CNE4_2b) can be connected to the first portion (CNE4_2a) across the gap between the third lane (EDA3_2) and the fourth lane (EDA4_2) described above.

[0293] The fifth connecting electrode (CNE5_2) may include a first portion (CNE5_2a) that generally extends in the second direction (DR2) and a second portion (CNE5_2b) that has a convex inequality sign (<) shape toward the other side of the first direction (DR1) in the light-emitting region (EMA).

[0294] The first part (CNE5_2a) of the fifth connecting electrode (CNE5_2) overlaps with the fourth alignment electrode (RME4_2) in the third direction (DR3) and can be electrically connected to each other through the second contact part (CT2).

[0295] The second portion (CNE5_2b) of the fifth connecting electrode (CNE5_2) may contact the other end (ED1b) of each of the fourth light-emitting elements (ED4). The second portion (CNE5_2b) may include a first inclined portion (CNE5_2ba) extending in the fourth direction (DR4) and a second inclined portion (CNE5_2bb) extending in the fifth direction (DR5).

[0296] Meanwhile, the first channel (EDA1_2), second channel (EDA2_2), third channel (EDA3_2), and fourth channel (EDA4_2), which have a convex inequality sign (<) shape on the other side of the first direction (DR1) including a portion extending in the fourth direction (DR4) and a portion extending in the fifth direction (DR5), each have a length equal to or greater than the first width (H1). Specifically, the length (L1_2) of the first lane (EDA1_2) may be the sum of the length of the part extending in the fourth direction (DR4) and the length of the part extending in the fifth direction (DR5), the length (L2_2) of the second lane (EDA1_2) may be the sum of the length of the part extending in the fourth direction (DR4) and the length of the part extending in the fifth direction (DR5), the length (L3_2) of the third lane (EDA3_2) may be the sum of the length of the part extending in the fourth direction (DR4) and the length of the part extending in the fifth direction (DR5), and the length (L4_2) of the fourth lane (EDA4_2) may be the sum of the length of the part extending in the fourth direction (DR4) and the length of the part extending in the fifth direction (DR5).

[0297] In addition, the length of the fourth direction (DR4) (L1_2) of the first channel (EDA1_2), the length of the fifth direction (DR5) (L2_2) of the second channel (EDA2_2), the length of the fourth direction (DR4) (L3_2) of the third channel (EDA3_2), and the length of the fifth direction (DR5) (L4_2) of the fourth channel (EDA4_2) may each be 44 μm or more.

[0298] With the configuration described above, the number of light-emitting elements (ED) that provide the minimum luminous efficiency required for a display device can be more easily secured.

[0299] FIG. 18 is a plan view illustrating the structure of a pixel of a display device according to another embodiment. FIG. 19 is a plan view illustrating the arrangement of alignment electrodes of FIG. 18. FIG. 20 is a plan view illustrating the arrangement of connecting electrodes and light-emitting elements of FIG. 18.

[0300] Referring to FIGS. 18 and 19, the display device (1_3) according to the present embodiment illustrates that a plurality of channels (EDA1_3, EDA2_3, EDA3_3, EDA4_3) in which light-emitting elements (ED) are arranged can form an 'X' shape. The internal bank (BP_3), alignment electrode (RME_3), and connection electrode (CNE_3) included in the display device (1_3) according to the present embodiment can be arranged in correspondence with the shape in which the plurality of channels are arranged.

[0301] The inner banks (BP_3) are positioned within the light-emitting region (EMA) and may have a shape that is bent into an inequality sign (<) shape that is convex toward the other side of the first direction (DR1) or an inequality sign (>) shape that is convex toward one side of the first direction (DR1). The inner banks (BP_3) may include a first inner bank (BP1_3), a second inner bank (BP2_3), and a third inner bank (BP3_3).

[0302] The first inner bank (BP1_3) may have a shape that is bent into a convex inequality sign (>) shape toward one side of the first direction (DR1). The first inner bank (BP1_3) may be positioned on the other side of the first direction (DR1) of the light-emitting region (EMA).

[0303] The second inner bank (BP2_3) may include a first inner bank (BP2_3a) having a shape that is bent into an inequality sign (>) shape that is convex toward one side of the first direction (DR1), and a second inner bank (BP2_3b) having a shape that is bent into an inequality sign (<) shape that is convex toward the other side of the first direction (DR1).

[0304] The first side inner bank (BP2_3a) may be positioned on one side of the first direction (DR1) of the first inner bank (BP1_3) so as to be engaged with the shape of the first inner bank (BP1_3), and the second side inner bank (BP2_3b) may be positioned on one side of the first direction (DR1) of the first inner bank (BP2_3a) so as to be symmetrical with the shape of the first side inner bank (BP2_3a).

[0305] The third inner bank (BP_3) may have a shape that is bent into a convex inequality sign (<) shape toward the other side of the first direction (DR1). The third inner bank (BP3_3) may be positioned on one side of the first direction (DR1) of the light-emitting area, that is, on one side of the first direction (DR1) of the second inner bank (BP2_3b), and may be coupled with the shape of the second inner bank (BP2_3b).

[0306] Each of the first inner bank (BP1_3), the second inner bank (BP2_3), and the third inner bank (BP3_3) may have a portion extending in the fourth direction (DR4) and a portion extending in the fifth direction (DR5).

[0307] By extending the first inner bank (BP1_3), the second inner bank (BP2_3), and the third inner bank (BP3_3) into the fourth direction (DR4) or the fifth direction (DR5), the spacing between the first inner bank (BP1_3), the second inner bank (BP2_3), and the third inner bank (BP3_3) can also be extended into the fourth direction (DR4) or the fifth direction (DR5). Accordingly, a plurality of light-emitting elements (ED) can also be arranged in the fourth direction (DR4) or the fifth direction (DR5).

[0308] A plurality of alignment electrodes (RME_3) may be disposed on an internal bank (BP_3). The alignment electrodes (RME_3) may include a first alignment electrode (RME1_3), a second alignment electrode (RME2_3), a third alignment electrode (RME3_3), and a fourth alignment electrode (RME4_3) that are spaced apart from each other. A first alignment electrode (RME1_3) may be disposed on the first internal bank (BP1_3), a second alignment electrode (RME2_3) may be disposed on the first side internal bank (BP2_3a) of the second internal bank (BP2_3), a third alignment electrode (RME3_3) may be disposed on the second side internal bank (BP2_3b) of the second internal bank (BP2_3), and a fourth alignment electrode (RME4_3) may be disposed on the third internal bank (BP3_3).

[0309] The first alignment electrode (RME1_3) may generally have a curved shape in the shape of an inequality sign (>) protruding to one side of the first direction (DR1). The first alignment electrode (RME1_3) may include a first part (RME1_3a) extending to the second direction (DR2), a second part (RME1_3b) extending to the fifth direction (DR5), a third part (RME1_3c) extending to the fourth direction (DR4), and a fourth part (RME1_3d) extending to the second direction (DR2).

[0310] The first portion (RME1_3a) of the first alignment electrode (RME1_3) may cross the outer bank (BNL) and sub-region (SA) positioned on the upper side of the light-emitting region (EMA), i.e., on the other side of the second direction (DR2). The first portion (RME1_3a) may extend to the separation portion (ROP).

[0311] The second portion (RME1_3b) of the first alignment electrode (RME1_3) is a portion disposed in the light-emitting region (EMA) and can extend in the fifth direction (DR5) from the light-emitting region (EMA). The second portion (RME1_3b) can extend from one side of the second direction (DR2) of the first portion (RME1_3a) to the other side of the second direction (DR2) of the third portion (RME1_3c).

[0312] The third portion (RME1_3c) of the first alignment electrode (RME1_3) is a portion disposed in the light-emitting region (EMA) and can extend from the light-emitting region (EMA) to the fourth direction (DR4). The third portion (RME1_3c) can extend from one side of the second direction (DR2) of the second portion (RME1_3b) to the other side of the second direction (DR2) of the fourth portion (RME1_3d).

[0313] The fourth portion (RME1_3d) of the first alignment electrode (RME1_3) may cross the outer bank (BNL) and sub-region (SA) located on the lower side of the light-emitting region (EMA), i.e., on one side of the second direction (DR2). The fourth portion (RME1_3d) may extend to the separation portion (ROP). The fourth portion (RME1_3d) may be electrically connected to the circuit element layer described above through the first electrode contact hole (CTD) penetrating the outer bank (BNL).

[0314] The second alignment electrode (RME2_3) may generally have a curved shape in the shape of an inequality sign (>) protruding to one side of the first direction (DR1). The second alignment electrode (RME2_3) may include a first part (RME2_3a) extending to the second direction (DR2), a second part (RME2_3b) extending to the fifth direction (DR5), a third part (RME2_3c) extending to the fourth direction (DR4), and a fourth part (RME2_3d) extending to the second direction (DR2).

[0315] The first portion (RME2_3a) of the second alignment electrode (RME2_3) may cross the outer bank (BNL) and sub-region (SA) positioned on the upper side of the light-emitting region (EMA), i.e., on the other side of the second direction (DR2). The first portion (RME2_3a) may extend to the separation portion (ROP).

[0316] The second portion (RME2_3b) of the second alignment electrode (RME2_3) is a portion disposed in the light-emitting region (EMA) and can extend in the fifth direction (DR5) from the light-emitting region (EMA). The second portion (RME2_3b) can extend from one side of the second direction (DR2) of the first portion (RME2_3a) to the other side of the second direction (DR2) of the third portion (RME2_3c).

[0317] The third portion (RME2_3c) of the second alignment electrode (RME2_3) is a portion disposed in the light-emitting region (EMA) and can extend from the light-emitting region (EMA) to the fourth direction (DR4). The third portion (RME2_3c) can extend from one side of the second direction (DR2) of the second portion (RME2_3b) to the other side of the second direction (DR2) of the fourth portion (RME2_3d).

[0318] The fourth portion (RME2_3d) of the second alignment electrode (RME2_3) may cross the outer bank (BNL) and sub-region (SA) located on the lower side of the light-emitting region (EMA), i.e., on one side of the second direction (DR2). The fourth portion (RME2_3d) may extend to the separation portion (ROP).

[0319] The third alignment electrode (RME3_3) may generally have a curved shape in the shape of an inequality sign (<) protruding toward the other side of the first direction (DR1). The third alignment electrode (RME3_3) may include a first part (RME3_3a) extending toward the second direction (DR2), a second part (RME3_3b) extending toward the fourth direction (DR4), a third part (RME3_3c) extending toward the fifth direction (DR5), and a fourth part (RME3_3d) extending toward the second direction (DR2).

[0320] The first portion (RME3_3a) of the third alignment electrode (RME3_3) may cross the outer bank (BNL) and sub-region (SA) positioned above the light-emitting region (EMA), i.e., on the other side of the second direction (DR2). The first portion (RME3_3a) may extend to the separation portion (ROP).

[0321] The second portion (RME3_3b) of the third alignment electrode (RME3_3) is a portion disposed in the light-emitting region (EMA) and can extend from the light-emitting region (EMA) to the fourth direction (DR4). The second portion (RME3_3b) can extend from one side of the second direction (DR2) of the first portion (RME3_3a) to the other side of the second direction (DR2) of the third portion (RME3_3c).

[0322] The third portion (RME3_3c) of the third alignment electrode (RME3_3) is a portion disposed in the light-emitting region (EMA) and can extend from the light-emitting region (EMA) to the fifth direction (DR5). The third portion (RME3_3c) can extend from one side of the second direction (DR2) of the second portion (RME3_3b) to the other side of the second direction (DR2) of the fourth portion (RME3_3d).

[0323] The fourth part (RME3_3d) of the third alignment electrode (RME3_3) can cross the outer bank (BNL) and sub-region (SA) located on the lower side of the light-emitting region (EMA), i.e., on one side of the second direction (DR2). The fourth part (RME3_3d) can extend to the separation section (ROP).

[0324] The fourth alignment electrode (RME4_3) may generally have a curved shape in the shape of an inequality sign (<) protruding toward the other side of the first direction (DR1). The fourth alignment electrode (RME4_3) may include a first part (RME4_3a) extending toward the second direction (DR2), a second part (RME4_3b) extending toward the fourth direction (DR4), a third part (RME4_3c) extending toward the fifth direction (DR5), and a fourth part (RME4_3d) extending toward the second direction (DR2).

[0325] The first portion (RME4_3a) of the fourth alignment electrode (RME4_3) may cross the outer bank (BNL) and sub-region (SA) positioned above the light-emitting region (EMA), i.e., on the other side of the second direction (DR2). The first portion (RME4_3a) may extend to the separation portion (ROP).

[0326] The second portion (RME4_3b) of the fourth alignment electrode (RME4_3) is a portion disposed in the light-emitting region (EMA) and can extend from the light-emitting region (EMA) to the fourth direction (DR4). The second portion (RME4_3b) can extend from one side of the second direction (DR2) of the first portion (RME4_3a) to the other side of the second direction (DR2) of the third portion (RME4_3c).

[0327] The third portion (RME4_3c) of the fourth alignment electrode (RME4_3) is a portion disposed in the light-emitting region (EMA) and can extend from the light-emitting region (EMA) to the fifth direction (DR5). The third portion (RME4_3c) can extend from one side of the second direction (DR2) of the second portion (RME4_3b) to the other side of the second direction (DR2) of the fourth portion (RME4_3d).

[0328] The fourth portion (RME4_3d) of the fourth alignment electrode (RME4_3) may cross the outer bank (BNL) and sub-region (SA) located on the lower side of the light-emitting region (EMA), i.e., on one side of the second direction (DR2). The fourth portion (RME4_3d) may extend to the separation portion (ROP). The fourth portion (RME4_3d) may be electrically connected to the circuit element layer described above through a second electrode contact hole (CTD) penetrating the outer bank (BNL).

[0329] As illustrated in FIG. 19, the first alignment electrode (RME1_3), the second alignment electrode (RME2_3), the third alignment electrode (RME3_3), and the fourth alignment electrode (RME4_3) are spaced apart from each other in a first direction (DR1), and within the light-emitting region (EMA), the spaced-out space between the first alignment electrode (RME1_3) and the second alignment electrode (RME2_3) and the spaced-out space between the third alignment electrode (RME3_3) and the fourth alignment electrode (RME4_3) can define paths (EDA1_3, EDA2_3, EDA3_3, EDA4_3) in which light-emitting elements (ED) are arranged.

[0330] Specifically, a second channel (EDA2_3) is disposed in the spaced-apart area between the first part (RME1_3a) of the first alignment electrode (RME1_3) and the first part (RME2_3a) of the second alignment electrode (RME2_3), and a first channel (EDA1_3) is disposed in the spaced-apart area between the second part (RME1_3b) of the first alignment electrode (RME1_3) and the second part (RME2_3b) of the second alignment electrode (RME2_3), and a third channel (EDA3_3) is disposed in the spaced-apart area between the first part (RME3_3a) of the third alignment electrode (RME3_3) and the first part (RME4_3a) of the fourth alignment electrode (RME4_3), and a second channel (EDA3_3) is disposed in the spaced-apart area between the second part (RME3_3b) of the third alignment electrode (RME3_3) and the second part (RME4_3) of the fourth alignment electrode (RME4_3). A fourth lane (EDA4_3) can be placed in the gap between the parts (RME4_3b).

[0331] Accordingly, the first lane (EDA1_3) and the third lane (EDA3_3) may be extended in the fourth direction (DR4), and the second lane (EDA2_3) and the fourth lane (EDA4_3) may be extended in the fifth direction (DR5). The first lane (EDA1_3) is positioned on one side of the second direction (DR2) of the second lane (EDA2_3), and accordingly, the shape of the multiple lanes may have an 'X' shape. Meanwhile, the space between the first channel (EDA1_3) and the second channel (EDA2_3) may be the space where the second part (CNE2_3b) of the second connecting electrode (CNE2_3), described later, is placed, and the space between the third channel (EDA3_3) and the fourth channel (EDA4_3) may be the space where the first part (CNE4_3a) of the fourth connecting electrode (CNE4_3), described later, is placed. The space between the first channel (EDA1_3) and the second channel (EDA2_3) and the space between the third channel (EDA3_3) and the fourth channel (EDA4_3) may be located in the center of the light-emitting region (EMA).

[0332] The orientation relationship of the light-emitting element (ED) of the display device (1_3) according to the present embodiment is substantially the same as the orientation relationship of the light-emitting element (ED) of the display device (1_1) according to the embodiment of FIG. 12, so a description thereof will be omitted.

[0333] One end and the other end of different light-emitting elements (ED) can be electrically connected by a connecting electrode (CNE_3).

[0334] A connecting electrode (CNE_3) may be placed on a light-emitting element (ED). The connecting electrode (CNE_3) may include a first connecting electrode (CNE1_3), a second connecting electrode (CNE2_3), a third connecting electrode (CNE3_3), a fourth connecting electrode (CNE4_3), and a fifth connecting electrode (CNE5_3) that are spaced apart from each other.

[0335] The first connecting electrode (CNE1_3) may include a first portion (CNE1_3a) extending generally in the second direction (DR2) and a second portion (CNE1_3b) extending in the fourth direction (DR4) in the light-emitting region (EMA).

[0336] The first part (CNE1_3a) of the first connecting electrode (CNE1_3) is positioned on one side of the second direction (DR2) of the light-emitting region (EMA) and overlaps with the first alignment electrode (RME1_3) in the third direction (DR3), and can be electrically connected to each other through the first contact part (CT1).

[0337] The second portion (CNE1_3b) of the first connecting electrode (CNE1_3) may be in contact with one end (ED1a) of each of the first light-emitting elements (ED1). The second portion (CNE1_3b) may be extended in the fourth direction (DR4) and may be extended to the portion where the first channel (EDA1_3) is arranged. In other words, the second portion (CNE1_3b) may be extended only to the vicinity of the center of the light-emitting region (EMA), that is, to the vicinity where the first light-emitting elements (ED1) are arranged.

[0338] The second connecting electrode (CNE2_3) may generally have a curved shape in the shape of an inequality sign (>) protruding toward one side of the first direction (DR1). The second connecting electrode (CNE2_3) may serve to electrically connect the other end (ED1b) of the first light-emitting element (ED1) and one end (ED2a) of the second light-emitting element (ED2). The second connecting electrode (CNE2_3) may include a first part (CNE2_3a) extending toward the fourth direction (DR4) and a second part (CNE2_3b) extending toward the fifth direction (DR5).

[0339] The first portion (CNE2_3a) of the second connecting electrode (CNE2_3) can be in contact with the other end (ED1b) of each of the first light-emitting elements (ED1). The first portion (CNE2_3a) can be extended in the fourth direction (DR4) to the vicinity where the second portion (CNE1_3b) of the first connecting electrode (CNE1_3) extends, that is, to the vicinity where the first light-emitting elements (ED1) are arranged.

[0340] The second portion (CNE2_3b) of the second connecting electrode (CNE2_3) may be in contact with one end (ED2a) of each of the second light-emitting elements (ED2). The second portion (CNE2_3b) may be extended in the fifth direction (DR5) to the vicinity where the second light-emitting elements (ED2) are arranged within the light-emitting region (EMA). The second portion (CNE2_3b) may be connected to the first portion (CNE2_3a) across the gap between the first channel (EDA1_3) and the second channel (EDA2_3) described above.

[0341] The third connecting electrode (CNE3_3) can serve to electrically connect the other end (ED2b) of the second light-emitting element (ED2) and one end (ED3a) of the third light-emitting element (ED3). The third connecting electrode (CNE3_3) may include a first part (CNE3_3a) extending in the fifth direction (DR5), a second part (CNE3_3b) extending in the fourth direction (DR4), and a connecting part (CNE3_3c) connecting the first part (CNE3_3a) and the second part (CNE3_3b).

[0342] The first portion (CNE3_3a) of the third connecting electrode (CNE3_3) may be in contact with the other end (ED2b) of each of the second light-emitting elements (ED2). The first portion (CNE3_3a) may be extended in the fifth direction (DR5) to the vicinity where the second light-emitting elements (ED2) are arranged within the light-emitting region (EMA). In other words, the first portion (CNE3_3a) of the third connecting electrode (CNE3_3) may be extended to the vicinity where the second portion (CNE2_3b) of the second connecting electrode (CNE2_3) is placed.

[0343] The second portion (CNE3_3b) of the third connecting electrode (CNE3_3) can be in contact with one end (ED3a) of each of the third light-emitting elements (ED3). The second portion (CNE3_3b) can be extended in a fourth direction (DR4) to the vicinity where the third light-emitting elements (ED3) are arranged within the light-emitting region (EMA).

[0344] The connecting portion (CNE3_3c) of the third connecting electrode (CNE3_3) can serve to connect the first portion (CNE3_3a) and the second portion (CNE3_3b). Specifically, the third connecting electrode (CNE3_3) can connect the other side of the second direction (DR2) of the first portion (CNE3_3a) and the other side of the second direction (DR2) of the second portion (CNE3_2b). The third connecting electrode (CNE3_3) can extend in the first direction (DR1) to connect the first portion (CNE3_3a) and the second portion (CNE3_3b). In some embodiments, the connecting portion (CNE3_3c) can be located on the other side of the second direction (DR2) of the light-emitting region (EMA).

[0345] The fourth connecting electrode (CNE4_3) may generally have a curved shape in the form of an inequality sign (<) protruding toward the other side of the first direction (DR1). The fourth connecting electrode (CNE4_3) may serve to electrically connect the other end (ED3b) of the third light-emitting element (ED3) and one end (ED4a) of the fourth light-emitting element (ED4). The fourth connecting electrode (CNE4_3) may include a first part (CNE4_3a) extending toward the fourth direction (DR4) and a second part (CNE4_3b) extending toward the fifth direction (DR5).

[0346] The first portion (CNE4_3a) of the fourth connecting electrode (CNE4_3) may be in contact with the other end (ED3b) of each of the third light-emitting elements (ED3). The first portion (CNE4_3a) may be extended in the fourth direction (DR4) to the vicinity where the second portion (CNE3_3b) of the third connecting electrode (CNE3_3) extends, that is, to the vicinity where the third light-emitting elements (ED3) are arranged. The first portion (CNE4_3a) may be connected to the second portion (CNE4_2a) across the gap between the aforementioned third channel (EDA3_3) and the fourth channel (EDA4_3).

[0347] The second portion (CNE4_3b) of the fourth connecting electrode (CNE4_3) can be in contact with one end (ED4a) of each of the fourth light-emitting elements (ED4). The second portion (CNE4_3b) can be extended in the fifth direction (DR5) to the vicinity where the fourth light-emitting elements (ED4) are arranged within the light-emitting region (EMA).

[0348] The fifth connecting electrode (CNE5_3) may include a first portion (CNE5_3a) extending generally in the second direction (DR2) and a second portion (CNE5_3b) extending in the fifth direction (DR5) in the light-emitting region (EMA).

[0349] The first part (CNE5_3a) of the fifth connecting electrode (CNE5_3) overlaps with the fourth alignment electrode (RME4_3) in the third direction (DR3) and can be electrically connected to each other through the second contact part (CT2).

[0350] The second portion (CNE5_3b) of the fifth connecting electrode (CNE5_3) may come into contact with the other end (ED1b) of each of the fourth light-emitting elements (ED4). The second portion (CNE5_3b) may extend in the fifth direction (DR5) and may extend to the portion where the fourth channel (EDA4_3) is arranged. In other words, the second portion (CNE5_3b) may extend only to the vicinity of the center of the light-emitting region (EMA), that is, to the vicinity where the fourth light-emitting elements (ED4) are arranged.

[0351] Similar to the case of the display device (1) according to one embodiment, the length of the fourth direction (DR4) of each of the first channel (EDA1_3), second channel (EDA2_3), third channel (EDA3_3) and fourth channel (EDA4_3) according to this embodiment may be equal to or greater than half the length of the second direction (DR2) of the long side (EDAb) of the light-emitting region (EDA). Specifically, the length of the fourth direction (DR4) (L1_3) of the first channel (EDA1_3), the length of the fifth direction (DR5) (L2_3) of the second channel (EDA2_3), the length of the fourth direction (DR4) (L3_3) of the third channel (EDA3_3), and the length of the fifth direction (DR5) (L4_3) of the fourth channel (EDA4_3) may be equal to or greater than the length of the first width (H1).

[0352] In addition, the length of the fourth direction (DR4) (L1_3) of the first channel (EDA1_3), the length of the fifth direction (DR5) (L2_3) of the second channel (EDA2_3), the length of the fourth direction (DR4) (L3_3) of the third channel (EDA3_3), and the length of the fifth direction (DR5) (L4_3) of the fourth channel (EDA4_3) may each be 44 μm or more.

[0353] With the configuration described above, the number of light-emitting elements (EDs) that provide the minimum light-emitting efficiency required by the display device can be easily secured while freely arranging the light-emitting elements (EDs).

[0354] Although embodiments of the present invention have been described above with reference to the attached drawings, those skilled in the art will understand that the present invention may be implemented in other specific forms without changing the technical concept or essential features thereof. Therefore, the embodiments described above should be understood as illustrative in all respects and not restrictive. Explanation of the symbols

[0355] BNL: External Bank EDA1: 1st Sago EDA2: Second Saga EDA3: Third Saga EDA4: The 4th Saga ED: Light-emitting element

Claims

Claim 1 A display device comprising: an outer bank disposed on a substrate to define a light-emitting region; a first lane in which a first light-emitting element is disposed within the light-emitting region; a second lane in which a second light-emitting element is disposed within the light-emitting region; a third lane in which a third light-emitting element is disposed within the light-emitting region; a fourth lane in which a fourth light-emitting element is disposed within the light-emitting region; and a plurality of alignment electrodes disposed between the substrate and the outer bank, wherein the light-emitting region has a rectangular shape consisting of a first side extending in a first direction and a second side extending in a second direction intersecting the first direction and having a length longer than the first side, and the first lane, the second lane, the third lane, and the fourth lane are each spaced apart from each other and each extend in a third direction intersecting the first direction and the second direction, and at least one alignment electrode overlaps with a corner of the outer bank. Claim 2 A display device according to claim 1, wherein the length of the first lane, the length of the second lane, the length of the third lane, and the length of the fourth lane are each at least 1 / 2 of the length of the second side of the light-emitting region. Claim 3 A display device according to paragraph 2, wherein the length of the first lane, the length of the second lane, the length of the third lane, and the length of the fourth lane are each 44 μm or more. Claim 4 A display device according to claim 1, wherein the first light-emitting element, the second light-emitting element, the third light-emitting element, and the fourth light-emitting element each comprise: one end having a first polarity; and another end having a second polarity different from the first polarity, wherein the other end of the first light-emitting element is electrically connected to one end of the second light-emitting element, the other end of the second light-emitting element is electrically connected to one end of the third light-emitting element, and the other end of the third light-emitting element is electrically connected to one end of the fourth light-emitting element. Claim 5 In claim 4, the plurality of alignment electrodes comprises: a first alignment electrode in which one end of the first light-emitting element and one end of the second light-emitting element are disposed; a second alignment electrode in which the other end of the first light-emitting element, the other end of the second light-emitting element, the other end of the third light-emitting element and the other end of the fourth light-emitting element are disposed; and a third alignment electrode in which one end of the third light-emitting element and one end of the fourth light-emitting element are disposed, wherein each of the first alignment electrode, the second alignment electrode and the third alignment electrode are spaced apart from each other and each extends in the third direction in the light-emitting region, and each of the first light-emitting element, the second light-emitting element, the third light-emitting element and the fourth light-emitting element are spaced apart from each other. Claim 6 A display device according to claim 5, further comprising a circuit element layer disposed between the substrate and the alignment electrode, wherein the first alignment electrode is electrically connected to the circuit element layer to receive a first voltage, and the second alignment electrode is electrically connected to the circuit element layer to receive a second voltage. Claim 7 A display device according to claim 6, further comprising: a first connecting electrode electrically connected to the first alignment electrode to supply the first voltage to one end of the first light-emitting element; a second connecting electrode electrically connecting the other end of the first light-emitting element to one end of the second light-emitting element; a third connecting electrode electrically connecting the other end of the second light-emitting element to one end of the third light-emitting element; a fourth connecting electrode electrically connecting the other end of the third light-emitting element to one end of the fourth light-emitting element; and a fifth connecting electrode electrically connected to the second alignment electrode to supply the second voltage to the other end of the fourth light-emitting element, wherein the first connecting electrode, the second connecting electrode, the third connecting electrode, the fourth connecting electrode, and the fifth connecting electrode are each spaced apart from each other. Claim 8 In claim 7, the second connecting electrode comprises: a first portion disposed on the other end of the first light-emitting element; a second portion disposed on one end of the second light-emitting element; and a first connecting portion connecting the first portion and the second portion, and the fourth connecting electrode comprises: a third portion disposed on the other end of the third light-emitting element; a fourth portion disposed on one end of the fourth light-emitting element; and a second connecting portion connecting the third portion and the fourth portion, wherein the first connecting portion passes through a spaced-out space between the first lane and the second lane, and the second connecting portion passes through a spaced-out space between the third lane and the fourth lane. Claim 9 A display device according to claim 8, wherein the first alignment electrode and the circuit element layer are electrically connected through a first contact hole that does not overlap with the light-emitting region, the second alignment electrode and the circuit element layer are electrically connected through a second contact hole that does not overlap with the light-emitting region, the first connecting electrode and the first alignment electrode are electrically connected through a third contact hole that does not overlap with the light-emitting region, and the fifth connecting electrode and the second alignment electrode are electrically connected through a fourth contact hole that does not overlap with the light-emitting region. Claim 10 An external bank disposed on a substrate to define a light-emitting region; a first channel in which a first light-emitting element is disposed within the light-emitting region; a second channel in which a second light-emitting element is disposed within the light-emitting region; a third channel in which a third light-emitting element is disposed within the light-emitting region; and a fourth channel in which a fourth light-emitting element is disposed within the light-emitting region. A display device comprising a plurality of alignment electrodes disposed between the substrate and the outer bank, wherein the light-emitting region has a rectangular shape consisting of a first side extending in a first direction and a second side extending in a second direction intersecting the first direction and having a length longer than the first side, wherein the first lane, the second lane, the third lane, and the fourth lane are each spaced apart from each other, wherein the first lane and the third lane each extend in a third direction intersecting the first direction and the second direction, and wherein the second lane and the fourth lane each extend in a fourth direction intersecting the first direction, the second direction, and the third direction, and wherein at least one alignment electrode overlaps with the corner of the outer bank. Claim 11 A long display device according to claim 10, wherein the length of the first lane, the length of the second lane, the length of the third lane, and the length of the fourth lane are each at least 1 / 2 of the length of the second side of the light-emitting region. Claim 12 A display device according to claim 11, wherein the length of the first lane, the length of the second lane, the length of the third lane, and the length of the fourth lane are each 44 μm or more. Claim 13 In claim 10, the first light-emitting element, the second light-emitting element, the third light-emitting element, and the fourth light-emitting element each comprise: one end having a first polarity; and another end having a second polarity different from the first polarity, wherein the other end of the first light-emitting element is electrically connected to one end of the second light-emitting element, the other end of the second light-emitting element is electrically connected to one end of the third light-emitting element, and the other end of the third light-emitting element is electrically connected to one end of the fourth light-emitting element. Claim 14 A display device according to claim 13, comprising an alignment electrode disposed between the substrate and the external bank, wherein the alignment electrode comprises: a first alignment electrode on which one end of the first light-emitting element and one end of the second light-emitting element are disposed; a second alignment electrode on which the other end of the first light-emitting element and the other end of the second light-emitting element are disposed; a third alignment electrode on which one end of the third light-emitting element and one end of the fourth light-emitting element are disposed; and a fourth alignment electrode on which the other end of the third light-emitting element and the other end of the fourth light-emitting element are disposed, wherein each of the first alignment electrode, the second alignment electrode, the third alignment electrode, and the fourth alignment electrode is spaced apart from each other. Claim 15 A display device comprising: an outer bank disposed on a substrate to define a light-emitting region; a first channel in which a first light-emitting element is disposed within the light-emitting region; a second channel in which a second light-emitting element is disposed within the light-emitting region; a third channel in which a third light-emitting element is disposed within the light-emitting region; a fourth channel in which a fourth light-emitting element is disposed within the light-emitting region; and a plurality of alignment electrodes disposed between the substrate and the outer bank, wherein the light-emitting region has a rectangular shape consisting of a first side extending in a first direction and a second side extending in a second direction intersecting the first direction and having a length longer than the first side, and the first channel, the second channel, the third channel, and the fourth channel each have a shape that is bent at least once, each spaced apart from each other, and at least one alignment electrode overlaps with a corner of the outer bank. Claim 16 A long display device according to claim 15, wherein the length of the first lane, the length of the second lane, the length of the third lane, and the length of the fourth lane are each at least 1 / 2 of the length of the second side of the light-emitting region. Claim 17 A display device according to claim 16, wherein the length of the first lane, the length of the second lane, the length of the third lane, and the length of the fourth lane are each 44 μm or more. Claim 18 In claim 15, the first light-emitting element, the second light-emitting element, the third light-emitting element, and the fourth light-emitting element each comprise: one end having a first polarity; and another end having a second polarity different from the first polarity, wherein the other end of the first light-emitting element is electrically connected to one end of the second light-emitting element, the other end of the second light-emitting element is electrically connected to one end of the third light-emitting element, and the other end of the third light-emitting element is electrically connected to one end of the fourth light-emitting element. Claim 19 A display device according to claim 18, comprising an alignment electrode disposed between the substrate and the external bank, wherein the alignment electrode comprises: a first alignment electrode on which one end of the first light-emitting element and one end of the second light-emitting element are disposed; a second alignment electrode on which the other end of the first light-emitting element and the other end of the second light-emitting element are disposed; a third alignment electrode on which one end of the third light-emitting element and one end of the fourth light-emitting element are disposed; and a fourth alignment electrode on which the other end of the third light-emitting element and the other end of the fourth light-emitting element are disposed, wherein each of the first alignment electrode, the second alignment electrode, the third alignment electrode, and the fourth alignment electrode is spaced apart from each other. Claim 20 A display device according to claim 19, wherein the first lane and the second lane are disposed in the spaced-apart space between the first alignment electrode and the second alignment electrode, and the third lane and the fourth lane are disposed in the spaced-apart space between the third alignment electrode and the fourth alignment electrode.

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