Display device

Abstract

A display device is provided. The display device includes: a first electrode arranged to extend in a first direction; a second electrode arranged to extend in the first direction and spaced apart from the first electrode in a second direction; a light-emitting element having a shape extending in one direction and arranged between the first electrode and the second electrode such that the one direction is parallel to either the first or the second direction; a first contact electrode having a shape extending in a third direction and having at least a portion disposed on the first electrode; and a second contact electrode having a shape extending in a third direction, arranged to be spaced apart from the first contact electrode in a fourth direction and having at least a portion disposed on the second electrode, wherein the first contact electrode contacts one side of the light-emitting element and the second contact electrode contacts the other side of the light-emitting element.

Description

Technical Field

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

[0002] With the development of multimedia technology, the importance of display devices has steadily increased. In response, various types of display devices, such as organic light-emitting diodes (OLEDs) and liquid crystal displays (LCDs), have been adopted.

[0003] A display device is a means for displaying images and includes display panels such as organic light-emitting display panels or liquid crystal display panels. A light-emitting display panel may include light-emitting elements (e.g., light-emitting diodes (LEDs)). Examples of LEDs include organic light-emitting diodes (OLEDs) that use organic materials as fluorescent materials and inorganic light-emitting diodes that use inorganic materials as fluorescent materials. Summary of the Invention

[0004] Technical issues

[0005] This disclosure provides a display device including electrodes and contact electrodes, the contact electrodes having a shape that extends in a direction inclined relative to the electrodes to correspond to the shape of a light-emitting element.

[0006] This disclosure also provides a display device with a novel electrode structure, the electrode structure including a light-emitting element and an electrode electrically connected to the light-emitting element.

[0007] It should be noted that the disclosed aspects are not limited thereto, and other aspects not mentioned herein will be clear to those skilled in the art from the following description.

[0008] Technical solution

[0009] According to a disclosed embodiment, a display device includes: a first electrode extending in a first direction; a second electrode extending in the first direction and spaced apart from the first electrode in a second direction intersecting the first direction; a light-emitting element having a shape extending in one direction and disposed between the first electrode and the second electrode, such that the one direction is parallel to either the first or the second direction; a first contact electrode having a shape extending upward in a third direction intersecting the first and second directions and including at least a portion disposed on the first electrode; and a second contact electrode having a shape extending upward in a third direction, spaced apart from the first contact electrode in a fourth direction intersecting the third direction, and including at least a portion disposed on the second electrode, wherein the first contact electrode contacts one side of the light-emitting element, and the second contact electrode contacts the other side of the light-emitting element.

[0010] Each of the first contact electrode and the second contact electrode may have a shape extending upward in a third direction, the third direction forming a first tilt angle with the first electrode and the second electrode in a first direction in which they extend.

[0011] The first tilt angle can be in the range of 10° to 80°.

[0012] The light-emitting element may include a first end surface and a second end surface in one direction, a first contact electrode may contact a portion of the first end surface, and a second contact electrode may contact a portion of the second end surface.

[0013] The light-emitting element may also include a third end surface and a fourth end surface in another direction intersecting the first direction, wherein a first contact electrode may partially contact the third end surface and a second contact electrode may partially contact the fourth end surface.

[0014] The light-emitting element may include a first semiconductor layer, a second semiconductor layer, and an active layer disposed between the first semiconductor layer and the second semiconductor layer. The light-emitting element may include a first light-emitting element and a second light-emitting element. The first light-emitting element is configured such that one surface of the active layer faces a first direction, and the second light-emitting element is configured such that one surface of the active layer faces a second direction.

[0015] In the first light-emitting element, the lower surface of the first semiconductor layer may include a second end surface that contacts the second contact electrode.

[0016] In the second light-emitting element, the lower surface of the first semiconductor layer may include a fourth end surface that contacts the second contact electrode.

[0017] In the light-emitting element, a first length measured in a first direction and a second length measured in a second direction can be defined, and the separation distance between the first contact electrode and the second contact electrode can satisfy the following equation 1.

[0018] [Equation 1]

[0019] DC≤LDsinθ c +HDcosθ c -2LCDsinθ c

[0020] Wherein, "DC" refers to the separation distance between the first contact electrode and the second contact electrode, "LD" refers to the first length of the light-emitting element, "HD" refers to the second length of the light-emitting element, "LCD" refers to the length of the contact area where one end surface of the light-emitting element contacts the first or second contact electrode, and "θ" refers to the length of the contact area where one end surface of the light-emitting element contacts the first or second contact electrode. c"Refers to the first tilt angle between the extension directions of the first contact electrode and the second contact electrode and the extension directions of the first electrode and the second electrode."

[0021] The second length of the light-emitting element can be greater than the separation distance between the first electrode and the second electrode.

[0022] In a light-emitting element, the first length can be equal to the second length.

[0023] The width of each of the first and second contact electrodes may be at least greater than the value obtained by dividing the length of the contact area by the sine of the first tilt angle.

[0024] The length of each of the first and second contact electrodes can be at least greater than the value obtained by dividing the length of the contact area by the cosine of the first tilt angle.

[0025] In a light-emitting element, the first length can be larger than the second length.

[0026] According to a disclosed embodiment, a display device includes: a first electrode including a portion extending in a first direction; a second electrode including a portion extending in the first direction and configured to be spaced apart from and facing the first electrode in a second direction intersecting the first direction; a light-emitting element disposed between the first electrode and the second electrode; a first contact electrode having a shape extending upward in a third direction and including at least a portion disposed on the first electrode, the third direction forming a first tilt angle with the first direction; and a second contact electrode having a shape extending upward in a third direction, configured to be spaced apart from the first contact electrode and including at least a portion disposed on the second electrode, wherein the first contact electrode contacts one side of the light-emitting element, the second contact electrode contacts the other side of the light-emitting element, and the first tilt angle is in the range of 10° to 80°.

[0027] The first electrode may include a first electrode extension and a first electrode connection. The width of the first electrode connection measured in a second direction is smaller than the width of the first electrode extension measured in a second direction. The second electrode includes a second electrode extension and a second electrode connection. The width of the second electrode connection measured in a second direction may be smaller than the width of the second electrode extension measured in a second direction. Furthermore, the first separation distance between the first electrode extension and the second electrode extension may be smaller than the second separation distance between the first electrode connection and the second electrode connection.

[0028] The light-emitting element can be disposed between the first electrode extension and the second electrode extension. The first contact electrode can contact one side of the light-emitting element on the first electrode extension, and the second contact electrode can contact the other side of the light-emitting element on the second electrode extension.

[0029] The length of each of the first electrode extension and the second electrode extension, measured in the first direction, can be greater than the length of the light-emitting element measured in the first direction and smaller than the sum of the length of the light-emitting element and the length of the portion in which one end surface of the light-emitting element contacts the first contact electrode.

[0030] The first electrode may include a first electrode extension extending in a first direction and a first electrode bend extending from the first electrode extension in a second direction. The first electrode extension may be spaced apart from the second electrode in the second direction. At least a portion of the first electrode bend may be stacked with the second electrode. The light-emitting element may be disposed between the first electrode extension, the first electrode bend, and the second electrode.

[0031] The second electrode may include a second electrode extension extending in a first direction and a second electrode bend extending from the second electrode extension in a second direction. The second electrode extension may be spaced apart from the first electrode extension, the second electrode bend may be spaced apart from the first electrode bend, and a light-emitting element may be disposed between the first electrode bend and the second electrode bend.

[0032] Details of other embodiments are included in the detailed description and the accompanying drawings.

[0033] Beneficial effects

[0034] A display device according to one embodiment may include electrodes extending in one direction, light-emitting elements disposed between the electrodes, and contact electrodes, each having a shape extending in a direction inclined relative to said one direction. The contact electrodes may partially contact both sides of the light-emitting elements in a diagonal (inclined) direction. Even if each of the light-emitting elements has a relatively small height and length, the contact electrodes contact the light-emitting elements in a direction diagonally opposite to the direction in which they extend, such that the separation distance between the contact electrodes can be fixed above a certain level, which is advantageous in manufacturing.

[0035] Therefore, electrodes and contact electrodes in display devices can have novel arrangement structures.

[0036] The effects of the embodiments are not limited to those listed above, and many more effects are included in this disclosure. Attached Figure Description

[0037] Figure 1 This is a plan view of a display device according to one embodiment.

[0038] Figure 2 This is a plan view showing a pixel of a display device according to one embodiment.

[0039] Figure 3 It is along Figure 2 The sectional view taken from line III-III'.

[0040] Figure 4 This is a schematic diagram of a light-emitting element according to one embodiment.

[0041] Figure 5 yes Figure 2 A magnified view of part Q1.

[0042] Figure 6 This is a plan view showing the arrangement of a light-emitting element and contact electrodes connected to the light-emitting element according to one embodiment.

[0043] Figure 7 This is a plan view showing the arrangement of a light-emitting element and contact electrodes connected to the light-emitting element according to one embodiment.

[0044] Figure 8 This is a schematic diagram of a light-emitting element according to another embodiment.

[0045] Figure 9 It shows including Figure 8 A plan view of a sub-pixel of a display device with light-emitting elements.

[0046] Figure 10 yes Figure 9 A magnified view of part Q2.

[0047] Figure 11 This is a plan view showing a sub-pixel of a display device including a light-emitting element according to yet another embodiment.

[0048] Figure 12 yes Figure 11 A magnified view of part Q3.

[0049] Figure 13 This is a plan view showing a sub-pixel of a display device according to another embodiment.

[0050] Figure 14 yes Figure 13 A magnified view of part Q4.

[0051] Figure 15 This is a plan view showing the electrode structure of a display device according to another embodiment.

[0052] Figure 16 It is along Figure 15 A sectional view taken from line VI-VI'.

[0053] Figure 17 This is a plan view showing the electrode structure of a display device according to another embodiment.

[0054] Figures 18 to 20 These are plan views showing the electrode structure of a display device according to another embodiment.

[0055] Figure 21 This is a plan view showing the electrode structure of a display device according to another embodiment. Detailed Implementation

[0056] The invention will now be described more fully below with reference to the accompanying drawings, in which preferred embodiments of the invention are shown. However, the invention may be embodied in various forms and should not be construed as limited to the embodiments set forth herein. Rather, these embodiments are provided so that this disclosure will be thorough and complete, and will fully convey the scope of the invention to those skilled in the art.

[0057] It will also be understood that when a layer is referred to as being "on" another layer or substrate, it can be directly on said other layer or substrate, or there may be an intermediate layer (intermediate layer). Throughout the specification, the same reference numerals indicate the same components.

[0058] It will be understood that although the terms “first,” “second,” etc., may be used herein to describe various elements, these elements should not be limited by these terms. These terms are used only to distinguish one element from another. For example, without departing from the teachings of the invention, the first element discussed below may be referred to as the second element. Similarly, the second element may also be referred to as the first element.

[0059] In the following description, embodiments will be illustrated with reference to the accompanying drawings.

[0060] Figure 1 This is a plan view of a display device according to one embodiment.

[0061] Reference Figure 1 The display device 10 displays video or still images. The display device 10 can refer to any electronic device that provides a display screen. For example, the display device 10 may include televisions, laptops, monitors, billboards, Internet of Things (IoT) devices, mobile phones, smartphones, tablet PCs, electronic watches, smartwatches, watch phones, head-mounted displays, mobile communication terminals, electronic notebooks, e-book readers, portable multimedia players (PMPs), navigation devices, game consoles, digital cameras, camcorders, etc.

[0062] The display device 10 includes a display panel that provides a displayed image. Examples of display panels may include inorganic light-emitting diode (LED) display panels, organic light-emitting diode (OLED) display panels, quantum dot (QD) light-emitting diode (OLED) display panels, plasma display panels, field emission display panels, etc. Although examples of using inorganic LED display panels are given below, the invention is not limited thereto, and it can be applied to other display panels when the same technical spirit (technical points) are applicable.

[0063] The shape of the display device 10 can be modified in various ways. For example, the display device 10 can have shapes such as a rectangle with a horizontal side length, a rectangle with a vertical side length, a square shape, a quadrilateral shape with rounded corners (vertices), other polygonal shapes, circular shapes, etc. The shape of the display area DPA of the display device 10 can also be similar to the overall shape of the display device 10. Figure 1 The image shows a rectangular display device 10 with its horizontal side length and a display area DPA.

[0064] Display device 10 may include a display area DPA and a non-display area NDA. The display area DPA is the area where images can be displayed, and the non-display area NDA is the area where images are not displayed. The display area DPA may refer to the active area, and the non-display area NDA may refer to the inactive area. The display area DPA typically occupies the center of the display device 10.

[0065] The display area DPA may include multiple pixels PX. The multiple pixels PX may be arranged in a matrix. The shape of each pixel PX in a planar view may be rectangular or square, but the invention is not limited thereto, and the shape may be a rhombus shape with each side inclined relative to a direction. The pixels PX may be arranged alternately in a stripe pattern or a penTile pattern. Furthermore, each pixel PX may include one or more light-emitting elements 300 that emit light within a specific wavelength range (see...). Figure 2 This allows a specific color to be displayed.

[0066] A non-display area NDA can be disposed around the display area DPA. The non-display area NDA can completely or partially surround the display area DPA. The display area DPA has a rectangular shape, and the non-display area NDA can be positioned adjacent to the four sides of the display area DPA. The non-display area NDA can form the border of the display device 10. Within each non-display area NDA, wiring or circuit driving components included in the display device 10 can be disposed, or external devices can be mounted.

[0067] Figure 2 This is a plan view showing a pixel of a display device according to one embodiment.

[0068] Reference Figure 2 The display device 10 may include a plurality of pixels PX, and each of the pixels PX may include a first sub-pixel PX1, a second sub-pixel PX2, and a third sub-pixel PX3. The first sub-pixel PX1 may emit light of a first color, the second sub-pixel PX2 may emit light of a second color, and the third sub-pixel PX3 may emit light of a third color. The first color may be blue, the second color may be green, and the third color may be red. However, the invention is not limited thereto, and sub-pixels PXn may emit light of the same color. Furthermore, in Figure 2 In the diagram, a pixel PX is shown as comprising three sub-pixels PXn, but is not limited to this and may include more than one number of sub-pixels PXn.

[0069] Each of the sub-pixels PXn in the display device 10 may include a region defined as a light-emitting region EMA. A first sub-pixel PX1 may include a first light-emitting region EMA1, a second sub-pixel PX2 may include a second light-emitting region EMA2, and a third sub-pixel PX3 may include a third light-emitting region EMA3. The light-emitting region EMA may be defined as a region in which a light-emitting element 300 included in the display device 10 is disposed to emit light within a specific wavelength range. The light-emitting element 300 includes an active layer 330 (see...). Figure 4 The active layer 330 can emit light within a specific wavelength range in any direction. Light emitted from the active layer 330 of the light-emitting element 300 can also be emitted in a direction toward the side surfaces of the light-emitting element 300, including its two ends. The light-emitting region EMA can include the area in which the light-emitting element 300 is disposed, and can include the area adjacent to the light-emitting element 300 through which light emitted from the light-emitting element 300 is emitted.

[0070] The invention is not limited thereto, and the luminous area EMA may also include an area in which light emitted from the luminous element 300 is reflected or refracted by another component to be emitted. Multiple luminous elements 300 may be disposed in each sub-pixel PXn, and the area where the luminous elements 300 are disposed and the area adjacent to said area form the luminous area EMA.

[0071] Although not shown in the accompanying drawings, each of the sub-pixels PXn of the display device 10 may include a non-light-emitting region defined as an area other than the light-emitting region EMA. The non-light-emitting region may be an area where no light-emitting element 300 is disposed and where light emitted from the light-emitting element 300 cannot reach, thus preventing light emission. Simultaneously, within the non-light-emitting region, an area may be formed where the layer beneath the layer on which the light-emitting element 300 is disposed is partially patterned. During the manufacturing process of the display device 10, after the light-emitting element 300 is disposed, some lines disposed beneath the light-emitting element 300 may be patterned. Patterning can be performed in the non-light-emitting region of each sub-pixel PXn where no light-emitting element 300 is disposed. A detailed description of this will be provided below.

[0072] Each of the sub-pixels PXn in the display device 10 may include a plurality of electrodes 210 and 220, a plurality of light-emitting elements 300, and a plurality of contact electrodes 261 and 262. Furthermore, the display device 10 may also include an outer embankment 450 configured to surround each sub-pixel PXn and inner embankments 410 and 420 disposed below the electrodes 210 and 220. According to one embodiment, the display device 10 may include electrodes 210 and 220 configured to extend in one direction and a plurality of contact electrodes 261 and 262, each having a shape extending in a direction intersecting said one direction.

[0073] Specifically, the electrodes 210 and 220 of the display device 10 may include a first electrode 210 and a second electrode 220. The first electrode 210 and the second electrode 220 may be disposed in each sub-pixel PXn, and may both be configured to extend in one direction and be spaced apart from each other and face each other in another direction intersecting the one direction.

[0074] The first electrode 210 may be disposed in each sub-pixel PXn in a manner extending along the second direction DR2. However, the first electrode 210 may not extend to another adjacent sub-pixel PXn along the second direction DR2, and may be configured to be partially spaced apart from the outer bank 450 surrounding each sub-pixel PXn. In some embodiments, the first electrode 210 may further include a portion configured to overlap with the outer bank 450, and the first electrode 210 may be electrically connected at the portion overlapping with the outer bank 450 to a circuit element layer included in the display device 10.

[0075] The second electrode 220 can be configured to extend along the second direction DR2 in each sub-pixel PXn. Unlike the first electrode 210, the second electrode 220 can be configured to extend to another adjacent sub-pixel PXn along the second direction DR2. That is, a connected second electrode 220 can be provided in multiple adjacent sub-pixels PXn along the second direction DR2. The second electrode 220 can be partially superimposed on the outer bank 450 at the boundary of the adjacent sub-pixels PXn along the second direction DR2, and the second electrode 220 can be electrically connected to the circuit element layer included in the display device 10 in the portion superimposed on the outer bank 450.

[0076] According to one embodiment, the first electrode 210 and the second electrode 220 of the display device 10 may be configured to extend in one direction and be spaced apart from each other and face each other in another direction intersecting the one direction. For example, the first electrode 210 and the second electrode 220 may have a shape extending in a second direction DR2 and may be configured to be spaced apart from each other in a first direction DR1. In the drawings, the first electrode 210 and the second electrode 220 are shown as being spaced apart from each other in a direction perpendicular to their extension direction, but the invention is not limited thereto. As long as the first electrode 210 and the second electrode 220 can be configured to be spaced apart from each other in a direction different from their extension direction, the angle formed by the direction and the extension direction is not particularly limited.

[0077] However, the shape of each of the first electrode 210 and the second electrode 220 is not limited thereto. In some cases, each of the first electrode 210 and the second electrode 220 may also include a main stem extending in the first direction DR1. In the first electrode 210, a different main stem may be provided for each sub-pixel PXn, and in the second electrode 220, a main stem extends to the adjacent sub-pixel PXn in the first direction DR1, such that the second electrodes 220 of the sub-pixels PXn are electrically connected to each other through the main stem. In this case, the second electrode 220 may be electrically connected to circuit elements in the non-display area NDA located at the periphery of the display area DPA in which a plurality of pixels PX or sub-pixels PXn are disposed.

[0078] Meanwhile, the accompanying drawings show a first electrode 210 and a second electrode 220 disposed in each sub-pixel PXn, but the invention is not limited thereto. In some embodiments, a greater number of first electrodes 210 and second electrodes 220 may be disposed in each sub-pixel PXn. In some embodiments, when the display device 10 includes a plurality of first electrodes 210 and a plurality of second electrodes 220, the first electrodes 210 and the second electrodes 220 may each have different widths. For example, among the first electrodes 210 and the second electrodes 220, one first electrode 210 and one second electrode 220 may each have a width larger than the other first electrode 210 and the other second electrode 220, respectively. The invention is not limited thereto, and the plurality of first electrodes 210 may each have a width larger than the width of each of the plurality of second electrodes 220, and vice versa.

[0079] Furthermore, the first electrode 210 and the second electrode 220 disposed in each sub-pixel PXn do not necessarily have to have a shape extending in one direction, and the first electrode 210 and the second electrode 220 can be arranged in various structures. For example, the first electrode 210 and the second electrode 220 can both have a partially curved or bent shape, and one of the first electrode 210 and the second electrode 220 can also be arranged to surround the other electrode in the first electrode 210 and the second electrode 220. As long as at least a portion of the region of the first electrode 210 and at least a portion of the region of the second electrode 220 are spaced apart from each other and face each other to form the region in which the light-emitting element 300 will be disposed, the arrangement structure and shape of the first electrode 210 and the second electrode 220 are not particularly limited.

[0080] Multiple electrodes 210 and 220 can be electrically connected to the light-emitting element 300 and can receive a predetermined voltage to cause the light-emitting element 300 to emit light. For example, the multiple electrodes 210 and 220 can be electrically connected to the light-emitting element 300 by contact electrodes 261 and 262 described below, and electrical signals applied to the electrodes 210 and 220 can be transmitted to the light-emitting element 300 through the contact electrodes 261 and 262.

[0081] In an exemplary embodiment, the first electrode 210 may be a separate pixel electrode for each sub-pixel PXn, while the second electrode 220 may be a common electrode connected along each sub-pixel PXn. One of the first electrode 210 and the second electrode 220 may be the anode of the light-emitting element 300, while the other of the first electrode 210 and the second electrode 220 may be the cathode of the light-emitting element 300. However, the invention is not limited thereto, and the opposite of the description above may be possible.

[0082] Furthermore, each of electrodes 210 and 220 can be used to form an electric field in the sub-pixel PXn, thereby aligning the light-emitting element 300. The light-emitting element 300 can be disposed between the first electrode 210 and the second electrode 220 by a process of forming an electric field between the first electrode 210 and the second electrode 220 by applying an alignment signal to the first electrode 210 and the second electrode 220. The light-emitting element 300 can be sprayed onto the first electrode 210 and the second electrode 220 in a dispersed state by an inkjet printing process, and the light-emitting element 300 can be aligned between the first electrode 210 and the second electrode 220 by applying an alignment signal between the first electrode 210 and the second electrode 220 to apply a dielectrophoretic force.

[0083] Meanwhile, as will be described below, the first electrode 210 and the second electrode 220 may be disposed on the inner embankments 410 and 420. The inner embankments 410 and 420 may include a first inner embankment 410 on which the first electrode 210 is disposed and a second inner embankment 420 on which the second electrode 220 is disposed.

[0084] The first inner dam 410 and the second inner dam 420 may each have a shape similar to that of the first electrode 210 and the second electrode 220. For example, the first inner dam 410 and the second inner dam 420 may both have a shape extending in the second direction DR2, and may be arranged to be spaced apart from each other and facing each other in the first direction DR1. The first inner dam 410 and the second inner dam 420 may extend in the second direction DR2, and may be spaced apart from each other and terminate at the boundary between sub-pixels PXn, so as not to extend to another adjacent sub-pixel PXn in the second direction DR2. Therefore, the first inner dam 410 and the second inner dam 420 may be provided in each sub-pixel PXn to form a pattern on the entire surface of the display device 10. By setting the inner dams 410 and 420 to be spaced apart from each other and facing each other, an area in which the light-emitting element 300 is provided can be formed between them. In the drawings, a first inner dam 410 and a second inner dam 420 are shown, but the invention is not limited thereto. In some cases, an additional number of inner embankments 410 and 420 may be provided depending on the number of electrodes 210 and 220, as will be described below.

[0085] Multiple light-emitting elements 300 can be disposed between the first electrode 210 and the second electrode 220. As an example, the light-emitting elements 300 can be spaced apart from each other between the first electrode 210 and the second electrode 220. However, the separation distance between the light-emitting elements 300 is not particularly limited. In some cases, multiple light-emitting elements 300 can be disposed adjacent to each other to form a group, and multiple other light-emitting elements 300 can be grouped together at a predetermined interval and can be configured to have a non-uniform density.

[0086] The light-emitting element 300 may have a shape extending in at least one direction, and the light-emitting element 300 may be configured such that said one direction is parallel to the direction in which the first electrode 210 and the second electrode 220 are spaced apart from each other (i.e., the first direction DR1). The light-emitting element 300 may be configured such that one end of it is placed on the first electrode 210 in said one direction, and the other end of it is placed on the second electrode 220 in said one direction. However, the invention is not limited thereto.

[0087] According to one embodiment, the light-emitting element 300 may include an active layer 330 of different materials to emit light of different wavelength ranges to the outside. According to one embodiment, the display device 10 may include a light-emitting element 300 that emits light of different wavelength ranges. The light-emitting element 300 of the first sub-pixel PX1 may include an active layer 330 that emits light of a first color having a first wavelength at the center wavelength range, the light-emitting element 300 of the second sub-pixel PX2 may include an active layer 330 that emits light of a second color having a second wavelength at the center wavelength range, and the light-emitting element 300 of the third sub-pixel PX3 may include an active layer 330 that emits light of a third color having a third wavelength at the center wavelength range.

[0088] Therefore, light of a first color can be emitted from the first sub-pixel PX1, light of a second color can be emitted from the second sub-pixel PX2, and light of a third color can be emitted from the third sub-pixel PX3. In some embodiments, the first color light can be blue light with a center wavelength range in the range of 450 nm to 495 nm, the second color light can be green light with a center wavelength range in the range of 495 nm to 570 nm, and the third color light can be red light with a center wavelength range in the range of 620 nm to 752 nm. However, the invention is not limited thereto. In some cases, the first sub-pixel PX1, the second sub-pixel PX2, and the third sub-pixel PX3 may include the same type of light-emitting element 300 to emit light of substantially the same color.

[0089] Multiple contact electrodes 261 and 262 can be disposed on corresponding electrodes 210 and 220. Contact electrodes 261 and 262 can be disposed in each sub-pixel PXn to correspond to the light-emitting element 300. Contact electrodes 261 and 262 can be electrically connected to the light-emitting element 300 and electrodes 210 and 220. For example, contact electrodes 261 and 262 can contact and be electrically connected to the first electrode 210 and the second electrode 220, respectively, and contact electrodes 261 and 262 can contact and be electrically connected to the light-emitting element 300.

[0090] Contact electrodes 261 and 262 may include a first contact electrode 261 and a second contact electrode 262, and the first contact electrode 261 and the second contact electrode 262 may be spaced apart from each other to be disposed on one side and the other side of the light-emitting element 300, respectively. For example, the first contact electrode 261 may partially cover one side of the light-emitting element 300 and at least a portion of the first contact electrode 261 may be disposed on the first electrode 210, and the second contact electrode 262 may partially cover the other side of the light-emitting element 300 and at least a portion of the second contact electrode 262 may be disposed on the second electrode 220. Therefore, the light-emitting element 300 may be electrically connected to electrodes 210 and 220, respectively, through contact electrodes 261 and 262.

[0091] According to one embodiment, the contact electrodes 261 and 262 of the display device 10 may both have a shape extending in a third direction DR3 intersecting the first direction DR1 and the second direction DR2. Furthermore, the first contact electrode 261 and the second contact electrode 262 may be configured to be spaced apart from each other in a fourth direction DR4 intersecting the third direction DR3. The contact electrodes 261 and 262 may both have a shape extending in a direction different from the extending direction of each of the first electrode 210 and the second electrode 220. For example, the direction in which the contact electrodes 261 and 262 extend may be a direction intersecting the extending directions of the electrodes 210 and 220 and the directions in which the electrodes 210 and 220 are spaced apart from each other. That is, the contact electrodes 261 and 262 may both have a shape extending in a direction diagonally or obliquely relative to the extending directions of the electrodes 210 and 220. Contact electrodes 261 and 262 can be disposed on electrodes 210 and 220 respectively, and at least some of contact electrodes 261 and 262 can also be disposed between the first electrode 210 and the second electrode 220.

[0092] Furthermore, the light-emitting element 300 may have a shape extending in one direction, and may be configured such that said one direction is parallel to the direction in which the first electrode 210 and the second electrode 220 are spaced apart from each other. Since each of the contact electrodes 261 and 262 has a shape extending along a third direction DR3 that intersects the direction in which the electrodes 210 and 220 extend and the direction in which the electrodes 210 and 220 are spaced apart from each other, the contact electrodes 261 and 262 may respectively cover one side and the other side of the light-emitting element 300 along the third direction DR3. That is, the contact electrodes 261 and 262 may be configured to partially cover one end and the other end of the light-emitting element 300 in one direction in which the light-emitting element 300 extends, and said one end and said other end may include areas that do not contact the contact electrodes 261 and 262. In an exemplary embodiment, some of the two end surfaces of the light-emitting element 300 in one direction in which the light-emitting element 300 extends may contact the contact electrodes 261 and 262. Furthermore, contact electrodes 261 and 262 can contact the side surface of the light-emitting element 300 in another direction that intersects with the first direction.

[0093] Meanwhile, as described above, each of the first contact electrode 261 and the second contact electrode 262 can be configured to correspond to the light-emitting element 300. A plurality of light-emitting elements 300 can be disposed between the first electrode 210 and the second electrode 220, and the contact electrodes 261 and 262 can be configured to correspond to the light-emitting element 300. According to one embodiment, a plurality of first contact electrodes 261 and a plurality of second contact electrodes 262 can be respectively disposed on electrodes 210 and 220, and the first contact electrodes 261 and the second contact electrodes 262 can be configured to be spaced apart from each other along the direction in which electrodes 210 and 220 extend. That is, the first contact electrodes 261 and the second contact electrodes 262 can be formed in patterns spaced apart from each other in one direction on the first electrode 210 and the second electrode 220, respectively. The arrangement of the contact electrodes 261 and 262, the light-emitting element 300, and the electrodes 210 and 220 will be described in detail below with reference to other accompanying drawings.

[0094] The outer embankment 450 may be disposed at the boundary between sub-pixels PXn. The outer embankment 450 may be configured to extend at least in the second direction DR2 to surround some of the electrodes 210 and 220 and the inner embankments 410 and 420 (including the area where the light-emitting element 300 is disposed between the inner embankments 410 and 420 and between the electrodes 210 and 220). Furthermore, the outer embankment 450 may also include a portion extending in the first direction DR1 and may form a grid pattern on the entire surface of the display area DPA. However, the invention is not limited thereto, and in some cases, the outer embankment 450 may be omitted.

[0095] The stacked structure of the display device 10 will be described in further detail below with reference to other accompanying drawings.

[0096] Figure 3 It is along Figure 2 The sectional view taken from line III-III'.

[0097] Figure 3 Only shown Figure 2 The profile of the first sub-pixel PX1, but the same profile can be applied to other pixels PX or sub-pixels PXn. Figure 3 It shows the crossing of the setting Figure 2 A cross-section of one end and the other end of the light-emitting element 300 in the first sub-pixel PX1.

[0098] Combination Figure 2 Reference Figure 3 The display device 10 may include a circuit element layer and a display element layer disposed on a first substrate 101. A semiconductor layer, multiple conductive layers, and multiple insulating layers are disposed on the first substrate 101, and the semiconductor layer, multiple conductive layers, and multiple insulating layers may constitute the circuit element layer and the display element layer. The multiple conductive layers may include a first gate conductive layer, a second gate conductive layer, a first data conductive layer, and a second data conductive layer disposed below the first planarization layer 109 to form the circuit element layer, and electrodes 210 and 220 and contact electrodes 261 and 262 disposed on the first planarization layer 109 to form the display element layer. The multiple insulating layers may include a buffer layer 102, a first gate insulating layer 103, a first protective layer 105, a first interlayer insulating layer 107, a second interlayer insulating layer 108, a first planarization layer 109, a first insulating layer 510, a second insulating layer 520, a third insulating layer 530, a fourth insulating layer 550, etc.

[0099] The circuit element layer may include circuit elements for driving the light-emitting element 300 and multiple lines (such as driving transistor DT, switching transistor ST, first conductive pattern CDP, and multiple voltage lines VL1 and VL2), and the display element layer may include the light-emitting element 300 and include a first electrode 210, a second electrode 220, a first contact electrode 261, a second contact electrode 262, etc.

[0100] The first substrate 101 can be an insulating substrate. The first substrate 101 can be made of an insulating material such as glass, quartz, polymer resin, etc. In addition, the first substrate 101 can be a rigid substrate, but it can also be a flexible substrate that is bendable, foldable, rollable, etc.

[0101] Light blocking layers BML1 and BML2 may be disposed on the first substrate 101. Light blocking layers BML1 and BML2 may include a first light blocking layer BML1 and a second light blocking layer BML2. The first light blocking layer BML1 and the second light blocking layer BML2 are configured to be stacked at least, respectively, with the first active material layer DT_ACT of the driving transistor DT and the second active material layer ST_ACT of the switching transistor ST. Light blocking layers BML1 and BML2 may include a light blocking material to prevent light from incident on the first active material layer DT_ACT and the second active material layer ST_ACT. As an example, the first light blocking layer BML1 and the second light blocking layer BML2 may be made of an opaque metallic material that blocks light transmission. However, the invention is not limited thereto, and in some cases, light blocking layers BML1 and BML2 may be omitted. Although not shown in the figures, the first light blocking layer BML1 may be electrically connected to the first source / drain electrode DT_SD1 of the driving transistor DT, and the second light blocking layer BML2 may be electrically connected to the first source / drain electrode ST_SD1 of the switching transistor ST, as will be described below.

[0102] The buffer layer 102 can be completely disposed on the first substrate 101 on which light-blocking layers BML1 and BML2 are formed. The buffer layer 102 can be formed on the first substrate 101 to protect the transistors DT and ST of the pixel PX from moisture penetrating through the first substrate 101 (which is susceptible to moisture penetration), and can perform a surface planarization function. The buffer layer 102 can be formed as a plurality of alternately stacked inorganic layers. For example, the buffer layer 102 can be formed to include silicon oxide (SiO2). x ), silicon nitride (SiN) x Multiple layers of inorganic layers alternately stacked, including at least one of silicon oxynitride (SiON).

[0103] A semiconductor layer is disposed on the buffer layer 102. The semiconductor layer may include a first active material layer DT_ACT for driving transistor DT and a second active material layer ST_ACT for switching transistor ST. The first active material layer DT_ACT and the second active material layer ST_ACT may be partially stacked with the gate electrodes DT_G and ST_G of the first gate conductive layer, which will be described below.

[0104] In an exemplary embodiment, the semiconductor layer may include polycrystalline silicon, monocrystalline silicon, oxide semiconductor, etc. Polycrystalline silicon can be formed by crystallizing amorphous silicon. Examples of crystallization methods may include rapid thermal annealing (RTA), solid-state crystallization (SPC), excimer laser annealing (ELA), metal-induced lateral crystallization (MILC), and sequential lateral curing (SLS), but the invention is not limited thereto. When the semiconductor layer includes polycrystalline silicon, the first active material layer DT_ACT may include a first doped region DT_ACTa, a second doped region DT_ACTb, and a first channel region DT_ACTc. The first channel region DT_ACTc may be disposed between the first doped region DT_ACTa and the second doped region DT_ACTb. The second active material layer ST_ACT may include a third doped region ST_ACTa, a fourth doped region ST_ACTb, and a second channel region ST_ACTc. The second channel region ST_ACTc may be disposed between the third doped region ST_ACTa and the fourth doped region ST_ACTb. The first doped region DT_ACTa, the second doped region DT_ACTb, the third doped region ST_ACTa, and the fourth doped region ST_ACTb can be regions in which a portion of each of the first active material layer DT_ACT and the second active material layer ST_ACT is doped with impurities.

[0105] In an exemplary embodiment, the first active material layer DT_ACT and the second active material layer ST_ACT may include an oxide semiconductor. In this case, the doped regions of each of the first active material layer DT_ACT and the second active material layer ST_ACT may be regions that have become conductive. The oxide semiconductor may be an oxide semiconductor comprising indium (In). In some embodiments, the oxide semiconductor may be indium tin oxide (ITO), indium zinc oxide (IZO), indium gallium oxide (IGO), indium zinc tin oxide (IZTO), indium gallium zinc oxide (IGZO), indium gallium tin oxide (IGTO), or indium gallium zinc tin oxide (IGZTO), etc. However, the present invention is not limited thereto.

[0106] A first gate insulating layer 103 is disposed on the semiconductor layer and the buffer layer 102. The first gate insulating layer 103 can be used as the gate insulating film for the driving transistor DT and the switching transistor ST. The first gate insulating layer 103 can be formed to include materials such as silicon oxide (SiO2). x ), silicon nitride (SiN) x ) and silicon oxynitride (SiO) x N y It can be a single inorganic layer of inorganic material, or a multi-layered structure in which inorganic layers are stacked alternately or stacked.

[0107] A first gate conductive layer is disposed on a first gate insulating layer 103. The first gate conductive layer may include a first gate electrode DT_G of a driving transistor DT and a second gate electrode ST_G of a switching transistor ST. The first gate electrode DT_G is configured to be stacked with at least a portion of a region of a first active material layer DT_ACT, and the second gate electrode ST_G is configured to be stacked with at least a portion of a region of a second active material layer ST_ACT. For example, the first gate electrode DT_G may be configured to be stacked with a first channel region DT_ACTc of the first active material layer DT_ACT in the thickness direction, and the second gate electrode ST_G may be configured to be stacked with a second channel region ST_ACTc of the second active material layer ST_ACT in the thickness direction.

[0108] The first gate conductive layer may be formed as a single layer or multiple layers made of one of molybdenum (Mo), aluminum (Al), chromium (Cr), gold (Au), titanium (Ti), nickel (Ni), neodymium (Nd), and copper (Cu) or alloys thereof. However, the present invention is not limited thereto.

[0109] A first protective layer 105 is disposed on the first gate conductive layer. The first protective layer 105 can be configured to cover the first gate conductive layer and can perform the function of protecting the first gate conductive layer. The first protective layer 105 can be made of materials such as silicon oxide (SiO2). x ), silicon nitride (SiN) x ) and silicon oxynitride (SiO) x N y It can be formed by a single inorganic layer of inorganic material, or by alternating or stacking inorganic layers to form a multi-layered structure.

[0110] A second gate conductive layer is disposed on the first protective layer 105. The second gate conductive layer may include a first capacitor electrode CE1 of a storage capacitor, the first capacitor electrode CE1 being configured such that at least a portion of its area overlaps with the first gate electrode DT_G in the thickness direction. The first capacitor electrode CE1 and the first gate electrode DT_G may overlap each other in the thickness direction, and the first protective layer 105 is disposed between the first capacitor electrode CE1 and the first gate electrode DT_G, and the first capacitor electrode CE1, the first gate electrode DT_G, and the first protective layer 105 may form a storage capacitor. The second gate conductive layer may be formed as a single layer or multiple layers made of one or an alloy of molybdenum (Mo), aluminum (Al), chromium (Cr), gold (Au), titanium (Ti), nickel (Ni), neodymium (Nd), and copper (Cu). However, the present invention is not limited thereto.

[0111] A first interlayer insulating layer 107 is disposed on the second gate conductive layer. The first interlayer insulating layer 107 can serve as an insulating film between the second gate conductive layer and other layers disposed on the second gate conductive layer. The first interlayer insulating layer 107 can be made of materials such as silicon oxide (SiO2). x ), silicon nitride (SiN) x ) and silicon oxynitride (SiO) x N y It can be formed by a single inorganic layer of inorganic material, or by alternating or stacking inorganic layers to form a multi-layered structure.

[0112] A first data conductive layer is disposed on the first interlayer insulating layer 107. The first data conductive layer may include a first source / drain electrode DT_SD1 and a second source / drain electrode DT_SD2 of the driving transistor DT, and a first source / drain electrode ST_SD1 and a second source / drain electrode ST_SD2 of the switching transistor ST.

[0113] The first source / drain electrode DT_SD1 and the second source / drain electrode DT_SD2 of the driving transistor DT can contact the first doped region DT_ACTa and the second doped region DT_ACTb of the first active material layer DT_ACT through contact holes passing through the first interlayer insulating layer 107, the first protective layer 105, and the first gate insulating layer 103, respectively. The first source / drain electrode ST_SD1 and the second source / drain electrode ST_SD2 of the switching transistor ST can contact the third doped region ST_ACTa and the fourth doped region ST_ACTb of the second active material layer ST_ACT, respectively, through contact holes passing through the first interlayer insulating layer 107, the first protective layer 105, and the first gate insulating layer 103, respectively. In addition, the first source / drain electrode DT_SD1 of the driving transistor DT and the first source / drain electrode ST_SD1 of the switching transistor ST can be electrically connected to the first photoblocking layer BML1 and the second photoblocking layer BML2 through other contact holes, respectively. Meanwhile, in the first source / drain electrode DT_SD1 and the second source / drain electrode DT_SD2 of the driving transistor DT, and the first source / drain electrode ST_SD1 and the second source / drain electrode ST_SD2 of the switching transistor ST, when one electrode is a source electrode, the other electrode can be a drain electrode. However, the present invention is not limited thereto, and in the first source / drain electrode DT_SD1 and ST_SD1, and the second source / drain electrode DT_SD2 and ST_SD2, when one electrode is a drain electrode, the other electrode can be a source electrode.

[0114] The first data conductive layer can be formed as a single layer or multiple layers made of one of molybdenum (Mo), aluminum (Al), chromium (Cr), gold (Au), titanium (Ti), nickel (Ni), neodymium (Nd), and copper (Cu) or alloys thereof. However, the present invention is not limited thereto.

[0115] The second interlayer insulating layer 108 can be disposed on the first data conductive layer. The second interlayer insulating layer 108 can be completely disposed on the first interlayer insulating layer 107, simultaneously covering the first data conductive layer and serving to protect it. The second interlayer insulating layer 108 can be made of materials such as silicon oxide (SiO2). x ), silicon nitride (SiN) x ) and silicon oxynitride (SiO) x N y It can be formed by a single inorganic layer of inorganic material, or by alternating or stacking inorganic layers to form a multi-layered structure.

[0116] A second data conductive layer is disposed on the second interlayer insulating layer 108. The second data conductive layer may include a second voltage line VL2, a first voltage line VL1, and a first conductive pattern CDP. A high potential voltage (first power voltage (VDD)) to be supplied to the driving transistor DT may be applied to the first voltage line VL1, while a low potential voltage (second power voltage (VSS)) to be supplied to the second electrode 220 may be applied to the second voltage line VL2. During the manufacturing process of the display device 10, an alignment signal necessary for aligning the light-emitting element 300 may be applied to the second voltage line VL2.

[0117] The first conductive pattern CDP can be electrically connected to the first source / drain electrode DT_SD1 of the driving transistor DT through contact holes formed in the second interlayer insulating layer 108. The first conductive pattern CDP can also contact the first electrode 210, which will be described below, and the driving transistor DT can transmit a first electrical voltage (VDD) applied from the first voltage line VL1 to the first electrode 210 through the first conductive pattern CDP. Meanwhile, in the figures, the second data conductive layer is shown as including one first voltage line VL1 and one second voltage line VL2, but the invention is not limited thereto. The second data conductive layer may include a greater number of first voltage lines VL1 and a greater number of second voltage lines VL2.

[0118] The second conductive layer can be formed as a single layer or multiple layers made of one or an alloy of molybdenum (Mo), aluminum (Al), chromium (Cr), gold (Au), titanium (Ti), nickel (Ni), neodymium (Nd), and copper (Cu). However, the invention is not limited thereto.

[0119] A first planarization layer 109 is disposed on the second data conductive layer. The first planarization layer 109 may include an organic insulating material (e.g., an organic material such as polyimide (PI)) and may perform a surface planarization function.

[0120] Multiple inner diaphragms 410 and 420, multiple electrodes 210 and 220, an outer diaphragm 450, multiple contact electrodes 261 and 262, and a light-emitting element 300 are disposed on the first planarization layer 109. In addition, multiple insulating layers 510, 520, 530, and 550 may be further disposed on the first planarization layer 109.

[0121] Inner embankments 410 and 420 are directly disposed on the first planarization layer 109. Inner embankments 410 and 420 may include a first inner embankment 410 and a second inner embankment 420 disposed adjacent to the central portion of each pixel PX or sub-pixel PXn.

[0122] Each of the first inner dam 410 and the second inner dam 420 may have a structure in which at least a portion of it protrudes relative to the upper surface of the first planarization layer 109. The protruding portion of each of the first inner dam 410 and the second inner dam 420 may have an inclined side surface, and light emitted from the light-emitting element 300 disposed between the first inner dam 410 and the second inner dam 420 may travel toward the inclined side surfaces of the inner dams 410 and 420. As will be described below, when the electrodes 210 and 220 disposed on the inner dams 410 and 420 respectively comprise a material with high reflectivity, light emitted from the light-emitting element 300 may be reflected from the side surfaces of the inner dams 410 and 420 to be emitted in an upward direction relative to the first substrate 101. That is, the inner dams 410 and 420 may provide a region in which the light-emitting element 300 is disposed, and may simultaneously serve as reflective partitions that reflect light emitted from the light-emitting element 300 upward. In an exemplary embodiment, the inner dams 410 and 420 may comprise an organic insulating material such as polyimide (PI), but the invention is not limited thereto.

[0123] Multiple electrodes 210 and 220 are disposed on the inner embankments 410 and 420 and the first planarization layer 109. The multiple electrodes 210 and 220 may include a first electrode 210 disposed on the first inner embankment 410 and a second electrode 220 disposed on the second inner embankment 420.

[0124] The first electrode 210 and the second electrode 220 can be respectively disposed on the first inner bank 410 and the second inner bank 420, and can be spaced apart from each other and facing each other in the first direction DR1. A plurality of light-emitting elements 300 can be disposed between the first inner bank 410 and the second inner bank 420, and the light-emitting elements 300 can be disposed between the first electrode 210 and the second electrode 220, and at least one end of the light-emitting element 300 can be electrically connected to the first electrode 210 and the second electrode 220.

[0125] In some embodiments, the first electrode 210 and the second electrode 220 may be formed to have widths larger than those of the first inner dam 410 and the second inner dam 420, respectively. For example, the first electrode 210 and the second electrode 220 may be configured to cover the outer surfaces of the first inner dam 410 and the second inner dam 420, respectively. The first electrode 210 and the second electrode 220 may be disposed on the side surfaces of the first inner dam 410 and the second inner dam 420, respectively, and the separation distance between the first electrode 210 and the second electrode 220 may be smaller than the separation distance between the first inner dam 410 and the second inner dam 420. Furthermore, at least a portion of each of the first electrode 210 and the second electrode 220 may be directly disposed on the first planarization layer 109.

[0126] The first electrode 210 can be electrically connected to the driving transistor DT. For example, the first electrode 210 can contact the first conductive pattern CDP through the first contact hole CT1 formed in the region superimposed with the outer bank 450 and passing through the first planarization layer 109, and through this, the first electrode 210 can be electrically connected to the first source / drain electrode DT_SD1 of the driving transistor DT.

[0127] The second electrode 220 can be electrically connected to the second voltage line VL2. For example, the second electrode 220 can contact the second voltage line VL2 through a second contact hole CT2 formed in the region overlapping with the outer bank 450 and passing through the first planarization layer 109. As shown in the figures, the second electrodes 220 of adjacent sub-pixels PXn in the first direction DR1 are respectively electrically connected to the second voltage line VL2 through the second contact hole CT2.

[0128] Each of electrodes 210 and 220 may include a transparent conductive material. As an example, each of electrodes 210 and 220 may include materials such as indium tin oxide (ITO), indium zinc oxide (IZO), indium tin zinc oxide (ITZO), etc., but the invention is not limited thereto. In some embodiments, each of electrodes 210 and 220 may include a conductive material with high reflectivity. For example, each of electrodes 210 and 220 may include a metal such as silver (Ag), copper (Cu), or aluminum (Al) as a material with high reflectivity. In this case, for each sub-pixel PXn, each of electrodes 210 and 220 may reflect light emitted from the light-emitting element 300 and traveling in parallel to the side surfaces of the first inner dam 410 and the second inner dam 420 in an upward direction.

[0129] The invention is not limited thereto, and each of electrodes 210 and 220 may be formed in a structure in which one or more layers of transparent conductive material and a metal layer with high reflectivity are stacked, or formed as a single layer including transparent conductive material and metal layer. In an exemplary embodiment, each of electrodes 210 and 220 may have a stacked structure of ITO / Ag / ITO / IZO, or may be an alloy including Al, Ni, lanthanum (La), etc.

[0130] A first insulating layer 510 is disposed on the first planarization layer 109, the first electrode 210, and the second electrode 220. Except for the regions between the spaced-apart electrodes 210 and 220 or between the inner embankments 410 and 420, the first insulating layer 510 may be disposed on the sides of the inner embankments 410 and 420 opposite to the regions between the inner embankments 410 and 420. Furthermore, the first insulating layer 510 is configured to partially cover the first electrode 210 and the second electrode 220. For example, the first insulating layer 510 may be completely disposed on the first planarization layer 109 on which the first electrode 210 and the second electrode 220 are formed, and may be configured to expose a portion of the upper surface of each of the first electrode 210 and the second electrode 220. Openings (not shown) that partially expose the first electrode 210 and the second electrode 220 may be formed in the first insulating layer 510, and the first insulating layer 510 may be configured to cover only one side and the other side of each of the first electrode 210 and the second electrode 220. Some portions of the first electrode 210 and the second electrode 220 disposed on the inner embankments 410 and 420 may be exposed due to the openings.

[0131] The first insulating layer 510 protects the first electrode 210 and the second electrode 220, and simultaneously insulates the first electrode 210 from the second electrode 220. Furthermore, it prevents the light-emitting element 300 disposed on the first insulating layer 510 from direct contact with other components and being damaged. However, the shape and structure of the first insulating layer 510 are not limited thereto.

[0132] In an exemplary embodiment, a step difference may be formed on a portion of the upper surface of the first insulating layer 510 between the first electrode 210 and the second electrode 220. In some embodiments, the first insulating layer 510 may comprise an inorganic insulating material, and a portion of the upper surface of the first insulating layer 510, configured to partially cover the first electrode 210 and the second electrode 220, may be stepped due to the step difference formed by the electrodes 210 and 220 disposed below the first insulating layer 510. Therefore, an empty space may be formed between the upper surface of the first insulating layer 510 and the light-emitting element 300, which is formed on the first insulating layer 510 between the first electrode 210 and the second electrode 220. The empty space may also be filled with a material forming the second insulating layer 520, as will be described below.

[0133] However, the invention is not limited thereto. The first insulating layer 510 may be formed such that the portion disposed between the first electrode 210 and the second electrode 220 has a flat upper surface. The upper surface extends in one direction toward the first electrode 210 and the second electrode 220, and the first insulating layer 510 may also be disposed in the region where the electrodes 210 and 220 overlap with the inclined side surfaces of the first inner dam 410 and the second inner dam 420, respectively. The contact electrodes 261 and 262, which will be described below, may contact the exposed areas of the first electrode 210 and the second electrode 220, and may smoothly contact the end of the light-emitting element 300 on the flat upper surface of the first insulating layer 510.

[0134] An outer dam 450 may be disposed on the first insulating layer 510. As described above, the outer dam 450 may be disposed at the boundary between sub-pixels PXn. According to one embodiment, the height of the outer dam 450 may be greater than the height of each of the inner dams 410 and 420. Unlike the inner dams 410 and 420, the outer dam 450 can separate (divide) adjacent sub-pixels PXn and, simultaneously, as will be described below, prevent ink from overflowing into adjacent sub-pixels PXn during the inkjet printing process for setting the light-emitting elements 300 during the manufacturing process of the display device 10. That is, the outer dam 450 can separate the ink in which different light-emitting elements 300 are dispersed in different sub-pixels PXn to prevent the ink from mixing with each other. Similar to the inner dams 410 and 420, the outer dam 450 may include polyimide (PI), but the invention is not limited thereto.

[0135] The light-emitting element 300 can be disposed on the first insulating layer 510 between the inner dikes 410 and 420 or between the electrodes 210 and 220. For example, the light-emitting element 300 can be disposed on the first insulating layer 510 disposed between the inner dikes 410 and 420. Simultaneously, the light-emitting element 300 can be configured such that a portion of its area overlaps with each of the electrodes 210 and 220 in the thickness direction. One end of the light-emitting element 300 can overlap with and be placed on the first electrode 210 in the thickness direction, while the other end of the light-emitting element 300 can overlap with and be placed on the second electrode 220 in the thickness direction. However, the invention is not limited thereto, and although not shown in the figures, at least some of the light-emitting elements 300 disposed in each sub-pixel PXn can be disposed in areas other than the area formed between the inner dikes 410 and 420, for example, in the area between the inner dikes 410 and 420 and the outer dike 450.

[0136] The light-emitting element 300 may include a plurality of layers disposed along a direction parallel to the upper surface of the first substrate 101 or the upper surface of the first planarization layer 109. According to one embodiment, the light-emitting element 300 of the display device 10 may have a shape extending in one direction and a structure in which a plurality of semiconductor layers are sequentially disposed in said one direction. The light-emitting element 300 may be configured such that the light-emitting element 300 is parallel to the first planarization layer 109 along the direction in which it extends, and the plurality of semiconductor layers included in the light-emitting element 300 may be sequentially disposed in a direction parallel to the upper surface of the first planarization layer 109. However, the invention is not limited thereto. In some cases, when the light-emitting element 300 has different structures, the plurality of semiconductor layers may be disposed in a direction parallel to the first planarization layer 109.

[0137] The second insulating layer 520 may be partially disposed on the light-emitting element 300, which is disposed between the first electrode 210 and the second electrode 220. That is, the second insulating layer 520 may be disposed on the first insulating layer 510 between the first electrode 210 and the second electrode 220, and the light-emitting element 300 may be disposed between the first insulating layer 510 and the second insulating layer 520. In an exemplary embodiment, an insulating film 380 (see [example missing]) is formed on the outer surface of the light-emitting element 300. Figure 4 It can be in direct contact with the first insulating layer 510 and the second insulating layer 520. For example, the second insulating layer 520 can be configured to partially surround the outer surface of the light-emitting element 300, thus protecting the light-emitting element 300 and simultaneously fixing the light-emitting element 300 during the manufacturing process of the display device 10.

[0138] A portion of the second insulating layer 520 disposed on the light-emitting element 300 may have a shape extending in the second direction DR2 between the first electrode 210 and the second electrode 220 in a plan view. As an example, the second insulating layer 520 may form a strip pattern or an island pattern in each sub-pixel PXn.

[0139] A second insulating layer 520 may be disposed on the light-emitting element 300, and may expose one end and the other end of the light-emitting element 300. The exposed end of the light-emitting element 300 may contact contact electrodes 261 and 262, as will be described below. This shape of the second insulating layer 520 may be formed by a patterning process using the material forming the second insulating layer 520 through a typical masking process. The mask used to form the second insulating layer 520 has a width smaller than the length of the light-emitting element 300, and the material forming the second insulating layer 520 may be patterned to expose both ends of the light-emitting element 300. However, the invention is not limited thereto.

[0140] Furthermore, in an exemplary embodiment, a portion of the material of the second insulating layer 520 may be disposed between the first insulating layer 510 and the lower surface of the light-emitting element 300. The second insulating layer 520 may be formed to fill the space between the first insulating layer 510 and the light-emitting element 300 formed during the manufacturing process of the display device 10. Therefore, the second insulating layer 520 may be formed to surround the outer surface of the light-emitting element 300. However, the present invention is not limited thereto.

[0141] Multiple contact electrodes 261 and 262 and a third insulating layer 530 may be disposed on the second insulating layer 520.

[0142] In some embodiments, the first contact electrode 261 and the second contact electrode 262 may be configured to cover only a portion of the first electrode 210 and a portion of the second electrode 220, respectively. The first contact electrode 261 and the second contact electrode 262 may be configured to contact one side and the other side of the light-emitting element 300, respectively, and simultaneously cover only a portion of one side surface of the first electrode 210 and a portion of one side surface of the second electrode 220, respectively. As described above, the upper surface of each of the first electrode 210 and the second electrode 220 may be partially exposed, and the first contact electrode 261 and the second contact electrode 262 may contact the exposed upper surface of the first electrode 210 and the exposed upper surface of the second electrode 220, respectively. For example, the first contact electrode 261 may contact the portion of the first electrode 210 located on the first inner embankment 410, and the second contact electrode 262 may contact the portion of the second electrode 220 located on the second inner embankment 420. However, contact electrodes 261 and 262 may not be disposed on the other side surface of the first electrode 210 and the other side surface of the second electrode 220.

[0143] However, the present invention is not limited thereto, and in some cases, the first contact electrode 261 and the second contact electrode 262 may both be formed to be longer in the extending direction, and may be configured to partially cover the two side surfaces of the first electrode 210 and the two side surfaces of the second electrode 220, respectively.

[0144] Furthermore, at least a portion of each of the first contact electrode 261 and the second contact electrode 262 is disposed on the first insulating layer 510. According to one embodiment, the light-emitting element 300 has a semiconductor layer exposed at both end surfaces in its extending direction, and the first contact electrode 261 and the second contact electrode 262 may contact the light-emitting element 300 at the end surfaces of the exposed semiconductor layer. However, as described above, the first contact electrode 261 and the second contact electrode 262 may be configured to cover only some of the two exposed end surfaces of the light-emitting element 300, and the other two end surfaces may be exposed. However, the invention is not limited thereto.

[0145] A third insulating layer 530 is disposed on the first contact electrode 261. The third insulating layer 530 can electrically insulate the first contact electrode 261 and the second contact electrode 262 from each other. The third insulating layer 530 can be configured to cover the first contact electrode 261 and may not be disposed on the other end of the light-emitting element 300, so that the light-emitting element 300 can contact the second contact electrode 262. The third insulating layer 530 can partially contact the first contact electrode 261 and the second insulating layer 520 at the upper surface of the second insulating layer 520. The side surface of the third insulating layer 530 in the direction near the second electrode 220 can be aligned with one side surface of the second insulating layer 520.

[0146] The second contact electrode 262 is disposed on the second electrode 220, the second insulating layer 520, and the third insulating layer 530. The second contact electrode 262 can contact the other end of the light-emitting element 300 and the exposed upper surface of the second electrode 220. The other end of the light-emitting element 300 can be electrically connected to the second electrode 220 through the second contact electrode 262.

[0147] A first contact electrode 261 may be disposed between the first electrode 210 and the third insulating layer 530, and a second contact electrode 262 may be disposed on the third insulating layer 530. The second contact electrode 262 may partially contact the second insulating layer 520, the third insulating layer 530, the second electrode 220, and the light-emitting element 300. One end of the second contact electrode 262 in the direction near the first electrode 210 may be disposed on the third insulating layer 530. The first contact electrode 261 and the second contact electrode 262 may not contact each other due to the second insulating layer 520 and the third insulating layer 530. However, the invention is not limited thereto, and in some cases, the third insulating layer 530 may be omitted.

[0148] Contact electrodes 261 and 262 may comprise conductive materials. For example, contact electrodes 261 and 262 may comprise ITO, IZO, ITZO, or aluminum (Al), etc. As an example, contact electrodes 261 and 262 may comprise transparent conductive materials, and light emitted from the light-emitting element 300 may pass through contact electrodes 261 and 262 and travel toward electrodes 210 and 220. Each of electrodes 210 and 220 may comprise a material with high reflectivity, and electrodes 210 and 220 disposed on the inclined side surfaces of the inner embankments 410 and 420 may cause incident light to be reflected in an upward direction relative to the first substrate 101. However, the invention is not limited thereto.

[0149] The fourth insulating layer 550 can be completely disposed on the first substrate 101. The fourth insulating layer 550 can be used to protect the components disposed on the first substrate 101 from the influence of the external environment.

[0150] Each of the first insulating layer 510, second insulating layer 520, third insulating layer 530, and fourth insulating layer 550 described above may comprise an inorganic insulating material or an organic insulating material. In an exemplary embodiment, the first insulating layer 510, second insulating layer 520, third insulating layer 530, and fourth insulating layer 550 may all comprise materials such as silicon oxide (SiO2). x ), silicon nitride (SiN) x ), silicon oxynitride (SiO) x N y ), aluminum oxide (Al) x O y ) or aluminum nitride (Al x N y Inorganic insulating materials such as acrylic resin, epoxy resin, phenolic resin, polyamide resin, PI resin, unsaturated polyester resin, polystyrene resin, polyphenylene sulfide resin, benzocyclobutene, cardo resin, siloxane resin, silsesquioxane resin, polymethyl methacrylate, polycarbonate, or polymethyl methacrylate-polycarbonate synthetic resin may be used. However, the present invention is not limited thereto.

[0151] Meanwhile, the light-emitting element 300 can be a light-emitting diode, specifically, an inorganic light-emitting diode having a size of micrometer or nanometer and made of inorganic materials. The inorganic light-emitting diode can be aligned between two electrodes, wherein polarity is formed by creating an electric field in a specific direction between the two electrodes facing each other. The light-emitting element 300 can be aligned between the two electrodes due to the electric field formed on the two electrodes.

[0152] The light-emitting element 300 according to one embodiment may have a shape extending in one direction. The light-emitting element 300 may have a shape such as a rod, wire, tube, or plate. In an exemplary embodiment, the light-emitting element 300 may have a hexahedral structure or a plate-like structure. However, the shape of the light-emitting element 300 is not limited thereto; the light-emitting element 300 may have one of various shapes including a regular hexahedron, cuboid, polygonal prism such as a hexagonal prism, cylinder, or rod, and a shape extending in one direction but having a partially inclined outer surface. The plurality of semiconductor layers included in the light-emitting element 300, as described below, may have a structure in which they are sequentially arranged or stacked in one direction.

[0153] The light-emitting element 300 may include a semiconductor layer doped with impurities of any conductivity type (e.g., p-type or n-type). An electrical signal applied from an external power source can be transmitted to the semiconductor layer, and the semiconductor layer can emit light within a specific wavelength range.

[0154] Figure 4 This is a schematic diagram of a light-emitting element according to one embodiment.

[0155] Figure 4 The diagram shows a view in which the insulating film 380 of the light-emitting element 300 is partially cut to expose the semiconductor layer surrounded by the insulating film 380. However, the invention is not limited thereto, and the insulating film 380 may be configured to at least surround a side surface of each of the semiconductor layers.

[0156] Reference Figure 4 The light-emitting element 300 may include a first semiconductor layer 310, a second semiconductor layer 320, an active layer 330, an electrode layer 370, and an insulating film 380.

[0157] The first semiconductor layer 310 may be an n-type semiconductor layer. As an example, when the light-emitting element 300 emits light in the blue wavelength range, the first semiconductor layer 310 may include a semiconductor layer with the chemical formula Al. x Ga y In 1-x-y A semiconductor material of type N (0≤x≤1, 0≤y≤1, and 0≤x+y≤1). For example, the semiconductor material can be one or more of AlGaInN, GaN, AlGaN, InGaN, AlN, and InN doped with n-type impurities. The first semiconductor layer 310 can be doped with an n-type dopant. As an example, the n-type dopant can be Si, Ge, Se, Sn, etc. In an exemplary embodiment, the first semiconductor layer 310 can be n-GaN doped with n-type Si. The length of the first semiconductor layer 310 can be in the range of 1.5 μm to 5 μm, but the invention is not limited thereto.

[0158] A second semiconductor layer 320 is disposed on the active layer 330, which will be described below. The second semiconductor layer 320 may be a p-type semiconductor. As an example, when the light-emitting element 300 emits light in the blue or green wavelength range, the second semiconductor layer 320 may include a semiconductor with the chemical formula Al. x Ga y In 1-x-y A semiconductor material of type N (0≤x≤1, 0≤y≤1, 0≤x+y≤1). For example, the semiconductor material can be one or more of AlGaInN, GaN, AlGaN, InGaN, AlN, and InN doped with p-type impurities. The second semiconductor layer 320 can be doped with a p-type dopant. As an example, the p-type dopant can be Mg, Zn, Ca, or Ba, etc. In an exemplary embodiment, the second semiconductor layer 320 can be p-GaN doped with p-type Mg. The length of the second semiconductor layer 320 can be in the range of 0.05 μm to 0.10 μm, but the present invention is not limited thereto.

[0159] Meanwhile, each of the first semiconductor layer 310 and the second semiconductor layer 320 is shown in the figures as forming a single layer, but the invention is not limited thereto. According to some embodiments, each of the first semiconductor layer 310 and the second semiconductor layer 320 may further include a greater number of layers (e.g., a cladding or tensile strain barrier reducing (TSBR) layer) depending on the material of the active layer 330. A description thereof will be provided below with reference to other figures.

[0160] An active layer 330 is disposed between a first semiconductor layer 310 and a second semiconductor layer 320. The active layer 330 may comprise a material having a single quantum well structure or a multiple quantum well structure. When the active layer 330 comprises a material having a multiple quantum well structure, the active layer 330 may have a structure in which quantum layers and well layers are alternately stacked. In response to an electrical signal applied through the first semiconductor layer 310 and the second semiconductor layer 320, the active layer 330 may emit light due to the recombination of electron-hole pairs. As an example, when the active layer 330 emits light in the blue wavelength range, the active layer 330 may comprise a material such as AlGaN or AlGaInN. In particular, when the active layer 330 has a multiple quantum well structure in which quantum layers and well layers are alternately stacked, the quantum layers may comprise a material such as AlGaN or AlGaInN, and the well layers may comprise a material such as GaN or AlInN. In an exemplary embodiment, the active layer 330 comprises AlGaInN as a quantum layer and AlInN as a well layer. As described above, the active layer 330 can emit blue light with a center wavelength range in the range of 450 nm to 495 nm.

[0161] However, the present invention is not limited thereto, and the active layer 330 may have a structure in which semiconductor materials with large band gaps and semiconductor materials with small band gaps are stacked alternately, or may include other group III or group V semiconductor materials depending on the wavelength range of the emitted light. The light emitted by the active layer 330 is not limited to light in the blue wavelength range, and in some cases, the active layer 330 may also emit light in the red or green wavelength range. The length of the active layer 330 may be in the range of 0.05 μm to 0.10 μm, but the present invention is not limited thereto.

[0162] Simultaneously, the light emitted from the active layer 330 can be emitted not only to the outer surface of the light-emitting element 300, but also to the two side surfaces of the light-emitting element 300 along its length. The directionality of the light emitted from the active layer 330 is not limited to one direction.

[0163] Electrode layer 370 can be an ohmic contact electrode. However, the invention is not limited thereto, and electrode layer 370 can also be a Schottky contact electrode. Light-emitting element 300 may include at least one electrode layer 370. Although light-emitting element 300 in Figure 4 The light-emitting element 300 is shown as including a single electrode layer 370, but the invention is not limited thereto. In some cases, the light-emitting element 300 may include a greater number of electrode layers 370, or the electrode layers 370 may be omitted. The description of the light-emitting element 300 provided below applies equally even when the number of electrode layers 370 changes or another structure is further included.

[0164] When the light-emitting element 300 is electrically connected to electrodes 210, 220 or contact electrodes 261, 262, the electrode layer 370 can reduce the resistance between the light-emitting element 300 and the electrodes or contact electrodes. The electrode layer 370 may include a conductive metal. For example, the electrode layer 370 may include at least one of aluminum (Al), titanium (Ti), indium (In), gold (Au), silver (Ag), indium tin oxide (ITO), indium zinc oxide (IZO), and indium tin zinc oxide (ITZO). Furthermore, the electrode layer 370 may include a semiconductor material doped with n-type or p-type impurities. However, the invention is not limited thereto.

[0165] The insulating film 380 is configured to surround the outer surfaces of the plurality of semiconductor layers and electrode layers described above. In an exemplary embodiment, the insulating film 380 may be configured to at least surround the outer surface of the active layer 330 and may extend in one direction along which the light-emitting element 300 extends. The insulating film 380 may be used to protect the component. As an example, the insulating film 380 may be formed to surround a side surface portion of the component and expose both ends of the light-emitting element 300 in the length direction.

[0166] In the accompanying drawings, the insulating film 380 is shown as being formed to extend along the length of the light-emitting element 300 to cover the side surface of the first semiconductor layer 310 to the side surface of the electrode layer 370, but the invention is not limited thereto. Since the insulating film 380 only covers some of the outer surfaces of the semiconductor layers (including the active layer 330) or only a portion of the outer surface of the electrode layer 370, the outer surface of the electrode layer 370 can be partially exposed. Furthermore, the upper surface of the insulating film 380 can be formed in a rounded cross-section in a region adjacent to at least one end of the light-emitting element 300.

[0167] The thickness of the insulating film 380 can be in the range of 10 nm to 1.0 μm, but the present invention is not limited thereto. Preferably, the thickness of the insulating film 380 can be about 40 nm.

[0168] The insulating film 380 may include a material with insulating properties, such as silicon oxide (SiO2).x ), silicon nitride (SiN) x ), silicon oxynitride (SiO) x N y ), aluminum nitride (Al) x N y ), aluminum oxide (Al) x O y Therefore, it is possible to prevent electrical short circuits that may occur when the active layer 330 comes into direct contact with the electrodes through which electrical signals are transmitted to the light-emitting element 300. In addition, since the insulating film 380 protects the outer surface of the light-emitting element 300 (including the active layer 330), it is possible to prevent the degradation of luminous efficiency.

[0169] Furthermore, in some embodiments, the outer surface of the insulating film 380 may be surface-treated. When manufacturing the display device 10, the light-emitting element 300 may be sprayed onto the electrode in a dispersed state in ink and aligned. Here, in order to maintain the state in which the light-emitting element 300 is dispersed in ink and does not agglomerate (aggregate) with another adjacent light-emitting element 300, the surface of the insulating film 380 may be treated with a hydrophobic or hydrophilic treatment.

[0170] Simultaneously, the light-emitting element 300 may have a height HD measured along the direction in which the semiconductor layer is stacked. In an exemplary embodiment, the height HD of the light-emitting element 300 may be in the range of 1 μm to 10 μm or 2 μm to 6 μm, and preferably in the range of 3 μm to 5 μm. Furthermore, in the light-emitting element 300 according to one embodiment, a width WD measured in one direction and a length LD measured in another direction perpendicular to said one direction may be defined. In some embodiments, the width WD of the light-emitting element 300 may be in the range of 300 nm to 700 nm. However, the invention is not limited thereto, and the plurality of light-emitting elements 300 included in the display device 10 may have different diameters depending on the compositional differences of the active layer 330. Preferably, the width WD of the light-emitting element 300 may be about 500 nm.

[0171] Simultaneously, the length LD of the light-emitting element 300 can be larger than its width WD. The light-emitting element 300 can have a shape such that, when viewed from above, the width WD measured in one direction is larger than the length LD measured in another direction. The area of ​​the active layer 330 can vary depending on the width WD of the light-emitting element 300 measured in one direction and the length LD of the light-emitting element 300 measured in another direction. According to one embodiment, the light-emitting element 300 can have a width WD within a specific range and a length LD within a predetermined range, allowing the area of ​​the active layer 330 to be adjusted. Therefore, in the light-emitting element 300, the amount of light emitted from the active layer 330 can be adjusted.

[0172] Furthermore, in the light-emitting element 300 according to one embodiment, the ratio of height HD to length LD can vary when the length LD is adjusted. For example, in the light-emitting element 300, the length LD can be larger than the width WD and smaller than the height HD. However, the invention is not limited thereto, and in the light-emitting element 300, the length LD can be equal to the height HD, or the length LD can be larger than the height HD.

[0173] As described above, when the light-emitting element 300 is disposed between the first electrode 210 and the second electrode 220, multiple semiconductor layers can be stacked in a direction parallel to the upper surface of the first planarization layer 109. That is, in the light-emitting element 300, the semiconductor layers can be sequentially disposed along the first electrode 210 and the second electrode 220 in a first direction DR1 that is spaced apart from each other. Because the light-emitting element 300 has this arrangement, the direction in which the first electrode 210 and the second electrode 220 extend can be the same as the direction in which the length LD of the light-emitting element 300 extends.

[0174] The two ends of the light-emitting element 300 disposed between electrodes 210 and 220 can respectively contact the first contact electrode 261 and the second contact electrode 262. In the display device 10 according to one embodiment, the contact electrodes 261 and 262 may each have a shape that extends in a direction intersecting each of the directions in which electrodes 210 and 220 extend (e.g., the second direction DR2) and the directions in which electrodes 210 and 220 are spaced apart from each other (e.g., the first direction DR1) (e.g., the third direction DR3). That is, the contact electrodes 261 and 262 may extend in a direction that intersects the directions in which the height HD and length LD of the light-emitting element 300 extend.

[0175] When the length LD of the light-emitting element 300 is adjusted within a predetermined range, the ratio of the height HD to the length LD of the light-emitting element 300 can vary. According to one embodiment, the first tilt angle formed between the extending directions of the first contact electrode 261 and the second contact electrode 262 and the extending directions of electrodes 210 and 220, as well as the separation distance between the first contact electrode 261 and the second contact electrode 262, can be modified in various ways depending on the length LD of the light-emitting element 300. In other words, the shape and arrangement of the first contact electrode 261 and the second contact electrode 262 of the display device 10 can vary depending on the length LD of the light-emitting element 300. A more detailed description will be provided with reference to other accompanying drawings.

[0176] Figure 5 yes Figure 2 A magnified view of part Q1.

[0177] exist Figure 5In the diagram, the light-emitting element 300 is shown as having a shape in which the height HD is equal to the length LD. However, the invention is not limited thereto, and according to some embodiments, the length LD of the light-emitting element 300 may be less than or greater than the height HD of the light-emitting element 300.

[0178] Reference Figure 5 The display device 10 may include a first electrode 210 and a second electrode 220 that extend in a second direction DR2 and are spaced apart from each other in a first direction DR1, and a plurality of light-emitting elements 300 disposed between the first electrode 210 and the second electrode 220. Furthermore, the display device 10 may include contact electrodes 261 and 262 that contact the light-emitting elements 300 and the first electrode 210 or the second electrode 220.

[0179] According to one embodiment, the light-emitting element 300 may have a height HD greater than the separation distance DE between the first electrode 210 and the second electrode 220. As described above, in the light-emitting element 300, semiconductor layers may be stacked along the direction of the height HD, and the light-emitting element 300 may be configured such that the semiconductor layers are parallel to a first direction DR1 along their stacking direction, the first direction DR1 being the direction in which the electrodes 210 and 220 are spaced apart from each other. The light-emitting element 300 may have a height HD greater than the separation distance DE between the electrodes 210 and 220, and one end and the other end of the light-emitting element 300 in the direction of the height HD may be placed on the first electrode 210 and the second electrode 220, respectively.

[0180] During the manufacturing process of the display device 10, the light-emitting element 300 can be sprayed onto electrodes 210 and 220 in a dispersed state in ink, and can be positioned between electrodes 210 and 220 by an electric field generated on electrodes 210 and 220. When an electric field is generated, the light-emitting element 300 dispersed in ink can be subjected to dielectric force due to the electric field, and can be positioned between electrodes 210 and 220 while its position and orientation change. Here, the dielectric force can be transmitted to the light-emitting element 300, such that the first semiconductor layer 310, which is an n-type semiconductor layer, and the second semiconductor layer 320, which is a p-type semiconductor layer, point in a direction parallel to the direction of the electric field along their stacking direction. The electric field generated on electrodes 210 and 220 can be generated to be parallel to a first direction DR1 (the first direction DR1 is the direction in which electrodes 210 and 220 are spaced apart from each other), and the light-emitting element 300 can be configured such that the semiconductor layers point in the first direction DR1 along their stacking direction towards electrodes 210 and 220 spaced apart from each other. However, the present invention is not limited thereto, and at least some of the light-emitting elements 300 may be configured such that the direction of the height HD points to another direction other than the first direction DR1.

[0181] For example, the light-emitting element 300 may have a shape in which the height HD is equal to the length LD, and at least some of the plurality of light-emitting elements 300 may be configured such that the semiconductor layer along its stacking direction is parallel to the second direction DR2. According to one embodiment, the light-emitting element 300 may include a first light-emitting element 300A (in which the semiconductor layer along its stacking direction is parallel to the direction in which the electrodes 210 and 220 are spaced apart from each other (e.g., the first direction DR1)) and a second light-emitting element 300B (in which the semiconductor layer along its stacking direction is parallel to the direction in which the electrodes 210 and 220 extend (e.g., the second direction DR2)).

[0182] In the first light-emitting element 300A, the direction facing one surface of the active layer 330 can be a first direction DR1; while in the second light-emitting element 300B, the direction facing one surface of the active layer 330 can be a second direction DR2. However, the light-emitting element 300 can have a shape in which the height HD is equal to the length LD. The first light-emitting element 300A and the second light-emitting element 300B can be configured such that one end of each of the first light-emitting element 300A and the second light-emitting element 300B in the first direction DR1 is respectively disposed on electrodes 210 and 220.

[0183] Simultaneously, the two end surfaces of the light-emitting element 300 in the height HD direction can be exposed without forming an insulating film 380 on the two end surfaces. The aforementioned contact electrodes 261 and 262 can be electrically connected to the light-emitting element 300 by contacting the two end surfaces of the light-emitting element 300 in the height HD direction, respectively. For example, the first contact electrode 261 can contact the electrode layer 370 of the light-emitting element 300, or the first contact electrode 261 can contact the second semiconductor layer 320 of the light-emitting element 300 when the electrode layer 370 is omitted, and the second contact electrode 262 can contact the first semiconductor layer 310 of the light-emitting element 300.

[0184] The light-emitting element 300 may have the same dimensions in height HD and length LD, and may include a first light-emitting element 300A and a second light-emitting element 300B, wherein the active layer 330 faces different directions in the first light-emitting element 300A and the second light-emitting element 300B. The first light-emitting element 300A may be configured such that its two exposed end surfaces face a first direction DR1, while the second light-emitting element 300B may be configured such that its two exposed end surfaces face a second direction DR2. According to one embodiment, contact electrodes 261 and 262 may each have a direction intersecting the first direction DR1 and the second direction DR2. Figure 5 The shape extends on the "DRC" in the diagram and can be configured to partially cover both sides of the light-emitting element 300, respectively. Due to the contact electrodes 261 and 262 in one direction (… Figure 5 The contact electrodes 261 and 262 extend on the “DRC” (e.g., on the third direction DR3) so that they can contact the two end surfaces of the light-emitting element 300 in the direction of height HD and in the direction of length LD, respectively. The contact electrodes 261 and 262 can directly contact the semiconductor layer of the light-emitting element 300 exposed in the direction of height HD, regardless of the orientation of the active layer 330 of the light-emitting element 300.

[0185] The first light-emitting element 300A can be configured such that the direction of its height HD points towards the first direction DR1, and the semiconductor layer can be exposed at both end surfaces of the first light-emitting element 300A in the first direction DR1. The first contact electrode 261 and the second contact electrode 262 can respectively contact the two end surfaces of the first light-emitting element 300A in the first direction DR1 and the two end surfaces of the first light-emitting element 300A in the second direction DR2, and can directly contact the semiconductor layer exposed at the two end surfaces of the first light-emitting element 300A in the first direction DR1. The second light-emitting element 300B can be configured such that the direction of its height HD points towards the second direction DR2, and the semiconductor layer can be exposed at both end surfaces of the second light-emitting element 300B in the second direction DR2. The first contact electrode 261 and the second contact electrode 262 can respectively contact the two end surfaces of the second light-emitting element 300B in the first direction DR1 and the two end surfaces of the second light-emitting element 300B in the second direction DR2, and can directly contact the semiconductor layer exposed at the two end surfaces of the second light-emitting element 300B in the second direction DR2.

[0186] That is, according to one embodiment, the light-emitting element 300 may include a first end surface and a second end surface in a first direction DR1 (as the direction of height HD), and may include a third end surface and a fourth end surface in a second direction DR2 (as the direction of length LD). Contact electrodes 261 and 262 may both have a direction DRC intersecting the first direction DR1 and the second direction DR2 (see...). Figure 5 The first contact electrode 261 may contact the first and third end surfaces of the light-emitting element 300, and the second contact electrode 262 may contact the second and fourth end surfaces. Here, the first and second end surfaces may both be the end surfaces on which the exposed semiconductor layer of the light-emitting element 300 is positioned.

[0187] As described above, the light-emitting element 300 may include an active layer 330 having an area of ​​a desired level by means of a width WD and an adjustable length LD. Figure 5 As shown, the light-emitting elements 300 can all have the same dimensions in height HD and length LD, and can be arranged in different directions between electrodes 210 and 220 without having a uniform orientation. Since, according to one embodiment, contact electrodes 261 and 262 are configured to have a direction DRC diagonally opposite to the light-emitting elements 300 arranged between electrodes 210 and 220 (see... Figure 5 The shape extends on the surface, so that contact electrodes 261 and 262 can make electrical contact with each of the light-emitting elements 300, regardless of the orientation of the light-emitting elements 300.

[0188] Furthermore, contact electrodes 261 and 262 may not be directly connected to each other, and may be electrically connected to different electrodes 210 and 220 respectively, so that different signals can be transmitted to different electrodes 210 and 220. The first contact electrode 261 and the second contact electrode 262 may be configured to be spaced apart from each other by a predetermined separation distance DC (see...). Figure 5 The contact electrodes 261 and 262 are positioned diagonally to the direction of height HD or length LD at a predetermined first tilt angle θ. c Contact with the light-emitting element 300. Since the contact electrodes 261 and 262 are spaced apart from each other in a direction perpendicular to the diagonal direction, there is a process advantage that a sufficient separation distance DC between the contact electrodes 261 and 262 can be ensured even when the light-emitting element 300 has a relatively small height HD and length LD.

[0189] Specifically, contact electrodes 261 and 262 do not contact the entire exposed semiconductor layer of the light-emitting element 300, but only a portion of the semiconductor layer, while starting from one side of the light-emitting element 300, they are made at a predetermined contact distance WCD in a direction perpendicular to the diagonal direction (e.g., the fourth direction DR4). Figure 5 The light-emitting element 300 is covered. The contact distance WCD can be defined as the vertical distance from one side of the light-emitting element 300 to the area of ​​the light-emitting element 300 covered by the contact electrode 261 or 262 in a direction perpendicular to the diagonal direction. Simultaneously, the exposed semiconductor layer of the light-emitting element 300 can have a contact area LCD (see LCD) that contacts the contact electrode 261 or 262. Figure 5The electrical signals transmitted through electrodes 210 and 220 can be transmitted through the regions where contact electrodes 261 and 262 are in contact with the semiconductor layer of the light-emitting element 300. When the contact area between the light-emitting element 300 and contact electrodes 261 or 262 meets a certain level or greater, the electrical signals can diffuse (propagate) throughout the entire light-emitting element 300 even when only a portion of the semiconductor layer is in contact with contact electrodes 261 and 262.

[0190] According to one embodiment, even when both contact electrodes 261 and 262 are configured to cover the light-emitting element 300 by a contact distance WCD relative to the contact area LCD, the desired contact area LCD can be ensured. That is, in the display device 10 according to one embodiment, contact electrodes 261 and 262 may both have a direction DRE (see [reference needed]) in the extending direction of electrodes 210 and 220. Figure 5 ) Crossing direction DRC (see Figure 5 The shape extending on the electrode 210 and 220 is such that it is aligned with the direction in which they extend (see DRE). Figure 5 Forming the first tilt angle θ c (See Figure 5 Therefore, there are process advantages in adjusting the separation distance DC between contact electrodes 261 and 262. A more detailed description of this is provided below.

[0191] Meanwhile, as described above, contact electrodes 261 and 262 can be configured to correspond to the respective light-emitting elements 300, and a plurality of contact electrodes 261 and 262 configured as patterns spaced apart from each other can be formed in each sub-pixel PXn. For example, the first contact electrode 261 may include a first pattern 261a contacting one side of the first light-emitting element 300A and a second pattern 261b contacting one side of the second light-emitting element 300B. The second contact electrode 262 may include a third pattern 262a contacting the other side of the first light-emitting element 300A and a fourth pattern 262b contacting the other side of the second light-emitting element 300B. The first pattern 261a and the second pattern 261b may be configured to be spaced apart from each other along the direction in which the first electrode 210 extends, and the third pattern 262a and the fourth pattern 262b may be configured to be spaced apart from each other along the direction in which the second electrode 220 extends.

[0192] Depending on the size of the light-emitting element 300, the separation distance between the light-emitting elements 300, and the length LC and width WC of each of the contact electrodes 261 and 262, the first pattern 261a and the second pattern 261b of the first contact electrode 261 can be modified through a first pattern gap DD1 that is spaced apart from each other, and the third pattern 262a of the second pattern 261b of the first contact electrode 261 and the second pattern 262a of the second contact electrode 262 can be modified through a second pattern gap DD2 that is spaced apart from each other.

[0193] For example, the first pattern 261a and the second pattern 261b, separated by a first pattern gap DD1, can be at least larger than the length LD of the light-emitting element 300, allowing the first pattern 261a and the second pattern 261b to contact different light-emitting elements 300 respectively. However, the invention is not limited thereto. In some cases, the first pattern gap DD1 can be smaller than the length LD of the light-emitting element 300, and multiple first contact electrodes 261 can contact one light-emitting element 300. However, preferably, one first contact electrode 261 or one second contact electrode 262 can be disposed in one light-emitting element 300.

[0194] Furthermore, in contact electrodes 261 and 262, since the extension direction DRC is not the same as the extension direction DRE of electrodes 210 and 220 (see... Figure 5 The length LC and the second pattern gap DD2 are parallel, so the length LC and the second pattern gap DD2 can be such that each of the contact electrodes 261 and 262 does not contact one pattern of the other contact electrodes 261 and 262. For example, even when the first pattern 261a extends on the first electrode 210 in one direction DRC, the length LC of each of the contact electrodes 261 and 262 can have a range that allows the first pattern 261a to be spaced apart from the second electrode 220. Meanwhile, the second pattern 261b and the third pattern 262a can both have such a length LC and the second pattern gap DD2 that the second pattern 261b and the third pattern 262a do not contact each other. Furthermore, the second pattern gap DD2 can vary according to the average spacing of the plurality of light-emitting elements 300 disposed between the first electrode 210 and the second electrode 220.

[0195] In addition to the separation distance DC between the first contact electrode 261 and the second contact electrode 262 and the first tilt angle θ c In addition, the width WC of each of the contact electrodes 261 and 262 can vary depending on the contact area LCD. The first tilt angle θ is determined based on the process conditions for forming the contact electrodes 261 and 262. cWhen the separation distance DC is considered, the contact area LCD can be used to adjust the width WC of each of the contact electrodes 261 and 262.

[0196] As described above, the separation distance DC between contact electrodes 261 and 262 and the first tilt angle θ formed by contact electrodes 261 and 262 with electrodes 210 and 220. c The height HD and length LD of the light-emitting element 300 can be modified in various ways. This will be further described below with reference to other accompanying drawings.

[0197] Figure 6 This is a plan view showing the arrangement of a light-emitting element and contact electrodes connected to the light-emitting element according to one embodiment. Figure 7 This is a plan view showing the arrangement of a light-emitting element and contact electrodes connected to the light-emitting element according to one embodiment.

[0198] Apart from Figure 5 In addition, refer to Figure 6 and Figure 7 In contact electrodes 261 and 262 according to one embodiment, the separation distance DC between contact electrodes 261 and 262 and the first tilt angle θ formed with the extending directions DRE of electrodes 210 and 220 c It can vary depending on the height HD and length LD of the light-emitting element 300.

[0199] As an example, the first contact electrode 261 and the second contact electrode 262 can be configured to be spaced apart from each other in a direction perpendicular to the extending direction DRC of the contact electrodes 261 and 262, and can be configured such that the midpoint COC of the separation distance between the contact electrodes 261 and 262 (see...) Figure 5 The midpoint COE of the separation distance between electrodes 210 and 220 (see...) Figure 5 ) are placed on the same line CL (see Figure 5 In this case, the midpoint of the height HD of the light-emitting element 300 can also be set to lie on the same line CL as the midpoints COC and COE.

[0200] As described above, contact electrodes 261 and 262 can be configured with a contact area LCD of a certain level or greater with respect to the light-emitting element 300. The contact area LCD can be an area in which contact electrodes 261 or 262 contact a surface of an exposed semiconductor layer of the light-emitting element 300, and can be the minimum area required for electrical signals to be smoothly transmitted to the light-emitting element 300 through contact electrodes 261 or 262. For example, as... Figure 5As shown, the contact area LCD (or the length LCD of the contact area) can refer to the length of the area in the second direction DR2 of the region where the first pattern 261a of the first contact electrode 261 contacts the first end surface or the second end surface of the first light-emitting element 300A. That is, the contact electrodes 261 and 262 can be configured to have a predetermined first tilt angle θ in the direction relative to the height HD or length LD of the light-emitting element 300. c At the same time, it has the smallest contact area LCD.

[0201] Here, when the first tilt angle θ is formed by the extension direction DRC of contact electrodes 261 and 262 and the extension direction DRE of electrodes 210 and 220, c When contact electrodes 261 and 262 are provided, the sides of the contact areas LCD and the light-emitting element 300 that are spaced apart from each other and face each other due to contact electrodes 261 and 262 can be configured to have a first tilt angle θ. c In some embodiments, when the light-emitting element 300 is configured such that the separation distance between electrodes 210 and 220 is parallel to the direction of height HD, the first tilt angle θ of the contact electrodes 261 and 262 is... c The separation distance DC between contact electrodes 261 and 262, as well as the height HD and length LD of the light-emitting element 300, can have the relationship described in Equation 1 below.

[0202] [Equation 1]

[0203] DC = LDsinθ c +HDcosθ c -2LCDsinθ c

[0204] Wherein, "DC" refers to the separation distance between the first contact electrode 261 and the second contact electrode 262, "LD" refers to the length of the light-emitting element 300, "HD" refers to the height of the light-emitting element 300, "LCD" refers to the length of the contact area between the light-emitting element 300 and the contact electrode 261 or 262, and "θ" refers to the length of the contact area between the light-emitting element 300 and the contact electrode 261 or 262. c "Refers to the first tilt angle between the extension directions of contact electrodes 261 and 262 and the extension directions of electrodes 210 and 220."

[0205] During the manufacturing process of the display device 10, when it is possible to design the contact electrodes 261 and 262 to correspond to the light-emitting element 300, the first tilt angle θ of the contact electrodes 261 and 262 can be determined by Equation 1 when the height HD and length LD of the light-emitting element 300 and the required contact area LCD are specified. c Adjust the separation distance DC.

[0206] For example, such as Figure 6As shown, when the height HD and length LD of the light-emitting element 300 and the contact area LCD' in which the light-emitting element 300 contacts the contact electrode 261 or 262 are determined, the separation distance DC between the contact electrodes 261 and 262 can be fixed to adjust the first tilt angle θ between the contact electrodes 261 and 262 and the electrodes 210 and 220. c The separation distance DC between contact electrodes 261 and 262 can be defined as the separation distance DC1 between one side surface of the light-emitting element 300 and the extension line of one side of the first contact electrode 261 (see...). Figure 6 The separation distance DC2 between the extension line on one side of the second contact electrode 262 and the one side surface of the light-emitting element 300 (see) Figure 6 The sum of ) . When the separation distance DC between contact electrodes 261 and 262 is determined based on Equation 1, the first tilt angle θ between contact electrodes 261 and 262 and electrodes 210 and 220 can be determined according to the required contact area LCD. c In some embodiments, the first tilt angle θ of the contact electrodes 261 and 262 is determined according to the length LD of the light-emitting element 300. c The angle can be between 10° and 80° or between 30° and 60°, and preferably about 45°. However, the invention is not limited thereto.

[0207] At the same time, when the first tilt angle θ of contact electrodes 261 and 262 c When the separation distance DC is determined, the length LC and width WC of contact electrodes 261 and 262 can be adjusted. Contact electrodes 261 and 262 can have the desired width WC and length LC, such that contact electrodes 261 and 262 are spaced apart from each other by a predetermined separation distance DC and contact the sides of the light-emitting element 300 to have a contact area LCD of a certain level or greater. In an exemplary embodiment, the width WC of contact electrodes 261 and 262 can be at least greater than the contact distance WCD. The contact distance WCD can be determined by dividing the length of the contact area LCD by sinθ. c The obtained value, and in contact electrodes 261 and 262, the width WC can be larger than the contact distance WCD. Furthermore, the length LC of each of contact electrodes 261 and 262 can have a length sufficient to partially cover the end surface of the light-emitting element 300 perpendicular to the contact area LCD (at least including the contact area LCD). That is, the length LC of each of contact electrodes 261 and 262 can be at least greater than the length of the contact area LCD by dividing by "cosθ". c "And the value obtained is large."

[0208] In addition, such as Figure 7 As shown, the first tilt angle θ of contact electrodes 261 and 262c The distance DC between contact electrodes 261 and 262 can be fixed, while the separation distance DC between them can be adjusted. When the height HD and length LD of the light-emitting element 300 and the contact area LCD in which the light-emitting element 300 contacts the contact electrode 261 or 262 are determined, the first tilt angle θ between the contact electrodes 261 and 262 and the electrodes 210 and 220 can be fixed. c To adjust the separation distance DC between contact electrodes 261 and 262. When the width WC and length LC of contact electrodes 261 and 262 are determined and the first tilt angle θ between contact electrodes 261 and 262 and electrodes 210 and 220 is determined. c When determined, the separation distance DC between contact electrodes 261 and 262 can be adjusted based on Equation 1 according to the desired contact area "LCD". In this case, the contact distance of the portion of the light-emitting element 300 covered by contact electrodes 261 or 262 on one side can be changed to contact distance WCD.

[0209] However, in some embodiments, the separation distance between contact electrodes 261 and 262 may be smaller than the value determined by Equation 1 above. Taking into account process tolerances in the process of forming contact electrodes 261 and 262, contact electrodes 261 and 262 may be formed with a separation distance smaller than the separation distance DC determined by Equation 1. That is, contact electrodes 261 and 262 according to one embodiment can satisfy Equation 2 below.

[0210] [Equation 2]

[0211] DC≤LDsinθ c +HDcosθ c -2LCDsinθ c

[0212] Among them, "DC", "LD", "HD", "LCD" and "θ" c Same as described above.

[0213] Based on the process design within the range satisfying Equation 2, contact electrodes 261 and 262 can be configured with various separation distances DC and a first tilt angle θ. c In a display device 10 according to one embodiment, since contact electrodes 261 and 262 are configured at a first tilt angle θ relative to electrodes 210 and 220... c The electrodes are spaced apart from each other, thus providing a process advantage that ensures a sufficient separation distance DC between the contact electrodes 261 and 262 even when the light-emitting element 300 has a relatively small height HD and length LD.

[0214] Even when the light-emitting element 300 has different shapes, the first tilt angle θ of the contact electrodes 261 and 262 can be modified differently in the same way. c and separation distance DC.

[0215] Figure 8 This is a schematic diagram of a light-emitting element according to another embodiment. Figure 9 It shows including Figure 8 A plan view of a sub-pixel of a display device with light-emitting elements. Figure 10 yes Figure 9 A magnified view of part Q2.

[0216] Reference Figure 8 According to one embodiment, the length LD_1 of the light-emitting element 300_1 can be greater than its height HD_1. Therefore, in the light-emitting element 300_1, the active layer 330 can have a larger area, and the amount of light emitted by a single light-emitting element 300_1 can be further increased.

[0217] Reference Figure 9 and Figure 10 According to one embodiment, the display device 10_1 may include a light-emitting element 300_1 whose height HD_1 is smaller than its length LD_1. Since the light-emitting element 300_1 includes an active layer 330 with a large area, the number of light-emitting elements 300_1 disposed in each sub-pixel PXn can be reduced.

[0218] Furthermore, in the first contact electrode 261_1 and the second contact electrode 262_1 of the display device 10_1, the separation distance DC_1 between the first contact electrode 261_1 and the second contact electrode 262_1, and the slope or first tilt angle θ formed by the first contact electrode 261_1 or the second contact electrode 262_1 with each of the electrodes 210 and 220 c It can change. When with Figures 5 to 7 In contrast, the first contact electrode 261_1 and the second contact electrode 262_1 can be configured to be spaced apart from each other by a larger separation distance DC_1. In the light-emitting element 300_1, due to the increased length LD_1, sufficient contact area LCD can be ensured even when the contact electrodes 261_1 and 262_1 are spaced apart from each other by a relatively large separation distance DC_1.

[0219] However, the invention is not limited thereto. In some embodiments, the length LD of the light-emitting element 300 may be smaller than its height HD.

[0220] Figure 11 This is a plan view showing a sub-pixel of a display device including a light-emitting element according to yet another embodiment. Figure 12 yes Figure 11A magnified view of part Q3.

[0221] Reference Figure 11 and Figure 12 According to one embodiment, the display device 10_2 may include a light-emitting element 300_2 whose height HD_2 is greater than its length LD_2. Since the light-emitting element 300_2 includes an active layer 330 with a smaller area, the number of light-emitting elements 300_2 disposed in each sub-pixel PXn can be increased.

[0222] Furthermore, in the first contact electrode 261_2 and the second contact electrode 262_2 of the display device 10_2, the separation distance DC_2 between the first contact electrode 261_2 and the second contact electrode 262_2, and the slope or first tilt angle θ formed by the first contact electrode 261_2 or the second contact electrode 262_2 with each of the electrodes 210 and 220 c This can be varied. Because the length LD_2 of the light-emitting element 300_2 is reduced, the separation distance DC_2 between the first contact electrode 261_2 and the second contact electrode 262_2 can be reduced. However, when the process design requires a certain or greater separation distance DC_2, the first tilt angle θ formed by the contact electrodes 261_2 and 262_2 with the electrodes 210 and 220 can be adjusted. c To ensure sufficient contact area with the LCD. When with Figures 5 to 7 In contrast, contact electrodes 261_2 and 262_2 can be configured to have a smaller first tilt angle θ. c Furthermore, even when the contact distance WCD formed by the light-emitting element 300_2 and the contact electrode 261_2 or 262_2 is small, sufficient contact area LCD can be ensured.

[0223] In a display device 10 according to one embodiment, contact electrodes 261 and 262 may both have a shape extending in a direction not parallel to the extending directions of electrodes 210 and 220, and may contact the light-emitting element 300. The separation distance DC of contact electrodes 261 and 262 and the first tilt angle θ... c The required contact area of ​​the LCD can be adjusted within this range. The display device 10 has the technological advantage of ensuring a sufficient separation distance DC between the contact electrodes 261 and 262 even when the light-emitting element 300 has a relatively small height HD and length LD.

[0224] In the following, a display device 10 according to another embodiment will be described.

[0225] Within a range where the contact electrodes 261 and 262 have sufficient contact area with the light-emitting element 300 (LCD) and ensure sufficient separation distance (DC), the display device 10 can be modified in other structures. As an example, electrodes 210 and 220 of the display device 10 can have a structure in which the light-emitting element 300 can be disposed in a specific location.

[0226] Figure 13 This is a plan view showing a sub-pixel of a display device according to another embodiment. Figure 14 yes Figure 13 A magnified view of part Q4. For ease of description, Figure 14 By omitting Figure 13 The first inner dike 410 and the second inner dike 420 are shown.

[0227] Reference Figure 13 and Figure 14 In a display device 10_3 according to one embodiment, the first electrode 210_3 and the second electrode 220_3 may each include portions with different widths. Figure 13 and Figure 14 The display device 10_3 and Figure 2 The difference in the embodiment of the display device 10 is that each of the electrodes 210_3 and 220_3 has a portion whose width changes along the direction in which the electrodes 210_3 and 220_3 extend. In the following, repeated descriptions will be omitted, and the description will be based on the differences from the above.

[0228] The electrodes 210_3 and 220_3 of the display device 10_3 may each include electrode extension portions 210E_3 and 220E_3 (as portions with a large width) and electrode connecting portions 210B_3 and 220B_3, respectively. The electrode connecting portion 210B_3 connects the electrode extension portion 210E_3, and the electrode connecting portion 220B_3 connects the electrode extension portion 220E_3. For example, the first electrode 210_3 may include the first electrode extension portion 210E_3 and the first electrode connecting portion 210B_3 formed between the first electrode extension portions 210E_3, and the second electrode 220_3 may include the second electrode extension portion 220E_3 and the second electrode connecting portion 220B_3 formed between the second electrode extension portions 220E_3. The first electrode 210_3 and the second electrode 220_3 may both have a shape extending in one direction (e.g., the second direction DR2), and may each include electrode connecting portions 210B_3 and 220B_3, respectively, having a small width. The first electrode 210_3 may have a shape in which the first electrode extension portions 210E_3 are spaced apart from each other in the second direction DR2 and the first electrode connecting portions 210B_3 connect the first electrode extension portions 210E_3. The second electrode 220_3 may have a shape in which the second electrode extension portions 220E_3 are spaced apart from each other in the second direction DR2 and the second electrode connecting portions 220B_3 connect the second electrode extension portions 220E_3.

[0229] According to one embodiment, the width WE1 of each of the electrode extensions 210E_3 and 220E_3 can be larger than the width WE2 of each of the electrode connections 210B_3 and 220B_3. Therefore, the separation distance between the first electrode 210_3 and the second electrode 220_3 can have a first separation distance DE1 between the electrode extensions 210E_3 and 220E_3 and a second separation distance DE2 between the electrode connections 210B_3 and 220B_3, and the first separation distance DE1 can have a value smaller than the value of the second separation distance DE2.

[0230] The light-emitting element 300 can be aligned between electrodes 210_3 and 220_3 by the electric field generated between them, while simultaneously changing its position and orientation. Here, when the separation distance between electrodes 210_3 and 220_3 includes a portion smaller than other portions, a stronger electric field can be formed in the portion with a small width. For example, similar to the first electrode extension 210E_3 and the second electrode extension 220E_3, when electrodes 210_3 and 220_3 are arranged to be spaced apart from each other by a small first separation distance DE1, the light-emitting element 300 can preferably be disposed between the electrode extensions 210E_3 and 220E_3 rather than in the region between the electrode connections 210B_3 and 220B_3. Furthermore, when the light-emitting element 300 is disposed between a first electrode extension 210E_3 and a second electrode extension 220E_3, other light-emitting elements 300 can be disposed between other electrode extensions 210E_3 and 220E_3 without overlapping with the light-emitting element 300. That is, the electrodes 210_3 and 220_3 can guide the light-emitting element 300 to preferably be disposed at a specific location by including the electrode extensions 210E_3 and 220E_3 and the electrode connection portions 210B_3 and 220B_3.

[0231] Furthermore, as described above, contact electrodes 261_3 and 262_3 can be configured to correspond to the light-emitting element 300, and... Figure 13 and Figure 14 In the display device 10_3, contact electrodes 261_3 and 262_3 can be configured to correspond to electrode extensions 210E_3 and 220E_3. Since electrodes 210_3 and 220_3 can guide the light-emitting element 300 to be positioned at a specific location by including electrode extensions 210E_3 and 220E_3, the position of the light-emitting element 300 can be specified, making it easy to specify the arrangement and structure of contact electrodes 261_3 and 262_3.

[0232] Furthermore, contact electrodes 261_3 and 262_3 can be provided based on electrode extensions 210E_3 and 220E_3 to have a specific separation distance DC and a first tilt angle θ. c However, the electrode extensions 210E_3 and 220E_3 may both have a length that has a value within the range that the light-emitting element 300 disposed between the electrode extensions 210E_3 and 220E_3 and the contact electrode 261_3 or 262_3 have a sufficient contact area LCD.

[0233] According to one embodiment, the length of each of the electrode extensions 210E_3 and 220E_3 can be greater than the length LD or height HD of the light-emitting element 300, but can be less than or equal to the sum of the length LD or height HD and the length of the contact area LCD. Since the light-emitting element 300 can be arranged between the electrodes 210_3 and 220_3 with random density and separation distance, it is important to determine the first tilt angle θ. c The position and shape of each of the contact electrodes 261_3 and 262_3 are configured to ensure the desired contact area LCD. When the length of each of the electrode extensions 210E_3 and 220E_3 meets the aforementioned range, the contact electrodes 261_3 and 262_3 are positioned at a specific separation distance DC and a first tilt angle θ corresponding to the position and length of each of the electrode extensions 210E_3 and 220E_3. c During setup, the light-emitting elements 300 positioned between the electrode extension portions 210E_3 and 220E_3 can each have the required contact area LCD, regardless of the position of the light-emitting elements 300.

[0234] Meanwhile, since the first electrode 210_3 and the second electrode 220_3 both include electrode connection portions 210B_3 and 220B_3, each with a relatively small width, the inner embankments 410 and 420 can include portions that do not overlap with the electrodes 210_3 and 220_3 in the thickness direction. That is, the width of each of the inner embankments 410 and 420, measured in one direction, can be smaller than the width WE1 of each of the electrode extension portions 210E_3 and 220E_3, and can be larger than the width WE2 of each of the electrode connection portions 210B_3 and 220B_3. For example... Figure 13 As shown, portions of the upper surfaces of the inner embankments 410 and 420 on which electrode connection portions 210B_3 and 220B_3 are provided may not overlap with electrodes 210_3 and 220_3. On the other hand, the upper surfaces of the inner embankments 410 and 420 on which electrode extension portions 210E_3 and 220E_3 are provided may be covered by electrodes 210_3 and 220_3. However, the present invention is not limited thereto.

[0235] At the same time, with Figure 13 and Figure 14 Similar to the display device 10_3, the first electrode 210 and the second electrode 220 may have a structure in which the light-emitting element 300 can be guided to be positioned at a specific location.

[0236] Figure 15 This is a plan view showing the electrode structure of a display device according to another embodiment.

[0237] Reference Figure 15In a display device 10_4 according to one embodiment, electrodes 210_4 and 220_4 may each include portions extending in different directions. The first electrode 210_4 may include a first electrode extension 210S_4 extending in the second direction DR2 and a first electrode bend 210R_4 bending from the first electrode extension 210S_4 in the first direction DR1. The second electrode 220_4 may include a second electrode extension 220S_4 extending in the second direction DR2 and a second electrode bend 220R_4 bending from the second electrode extension 220S_4 in the first direction DR1. The first electrode 210_4 and the second electrode 220_4 may have a structure in which the electrode extensions 210S_4 and 220S_4 and the electrode bends 210R_4 and 220R_4 are respectively and alternately connected.

[0238] The first electrode 210_4 and the second electrode 220_4 can be disposed along the second direction DR2 in each sub-pixel PXn, and both can have a shape that bends several times. The first electrode 210_4 and the second electrode 220_4 can be bent several times and disposed to intersect each other, so they can be partially disposed on the first inner embankment 410 and the second inner embankment 420, respectively. In the region where the first electrode 210_4 and the second electrode 220_4 intersect each other, one electrode extension 210S_4 or 220S_4 can be partially superimposed on the electrode bend 210R_4 or 220R_4 of the other electrode.

[0239] Simultaneously, the first electrode extension 210S_4 and the second electrode extension 220S_4 can be spaced apart from each other in the first direction DR1, and the first electrode bend 210R_4 and the second electrode bend 220R_4 can be spaced apart from each other in the second direction DR2. The electrode extensions 210S_4 and 220S_4 and the electrode bends 210R_4 and 220R_4 of electrodes 210_4 and 220_4 can be spaced apart from each other in the first direction DR1 and the second direction DR2, and can partially form an electrode unit EU_4. An electrode unit EU_4 may include a region surrounded by the first electrode bend 210R_4, the first electrode extension 210S_4, the second electrode bend 220R_4, and the second electrode extension 220S_4. The first electrode 210_4 and the second electrode 220_4 may include multiple electrode extensions 210S_4 and 220S_4 and multiple electrode bends 210R_4 and 220R_4, such that multiple electrode unit portions EU_4 are formed in a predetermined region. The electrode extensions 210S_4 and 220S_4 and the electrode bends 210R_4 and 220R_4 of the electrode unit portions EU_4 may be configured to surround the predetermined region, and the electric field generated between the electrodes 210_4 and 220_4 may be formed in said region.

[0240] Therefore, with Figure 13 and Figure 14 Similar to the embodiment, electrodes 210_4 and 220_4 can guide the light-emitting element 300 to be disposed at a specific position. The first contact electrode 261_4 and the second contact electrode 262_4 are configured to correspond to the position of the electrode unit portion EU_4, such that the first contact electrode 261_4 and the second contact electrode 262_4 can be configured to correspond to the light-emitting element 300. In the display device 10_4, since electrodes 210_4 and 220_4 form the electrode unit portion EU_4, the light-emitting element 300 can be guided to be disposed at a specific position; and since the position of the light-emitting element 300 is specified, the arrangement and structure of the contact electrodes 261_4 and 262_4 can be easily specified.

[0241] Furthermore, the first electrode 210_4 and the second electrode 220_4 can be arranged along the second direction DR2 and can have a shape that bends several times. The first electrode 210_4 and the second electrode 220_4 can be arranged at different positions relative to the center portion of each electrode unit EU_4. For example, the first electrode 210_4 can be arranged on the left and lower side relative to the center portion of any one electrode unit EU_4, and the first electrode 210_4 can be arranged on the right and lower side relative to the center portion of another electrode unit EU_4. In each of the light-emitting elements 300 provided in the electrode unit EU_4, the orientation facing the active layer 330 can vary.

[0242] In an exemplary embodiment, contact electrodes 261_4 and 262_4 may each have a shape extending in a direction intersecting the direction in which electrode extensions 210S_4 and 220S_4 and electrode bends 210R_4 and 220R_4 extend. As described above, contact electrodes 261_4 and 262_4 may each have a first tilt angle θ relative to the direction in which each of electrodes 210_4 and 220_4 extends. c An extended shape. Similarly, in Figure 15 In the display device 10_4, the contact electrodes 261_4 and 262_4 may each have a shape that extends in a direction different from the direction in which the electrode extensions 210S_4 and 220S_4 and the electrode bending portions 210R_4 and 220R_4 extend.

[0243] Furthermore, contact electrodes 261_4 and 262_4 can be respectively disposed on the bent portions where the electrode extensions 210S_4 and 220S_4 and the electrode bends 210R_4 and 220R_4 connect, such that contact electrodes 261_4 and 262_4 can contact both sides of the light-emitting element 300 disposed in the space formed by the electrode unit portion EU_4. As described above, since the positions of the first electrode 210_4 and the second electrode 220_4 change relative to the center portion of each of the electrode unit portions EU_4, the positions of the first contact electrode 261_4 and the second contact electrode 262_4 can also be changed to correspond to the first electrode 210_4 and the second electrode 220_4, respectively. However, a detailed description thereof will be omitted.

[0244] Meanwhile, since the first electrode 210_4 and the second electrode 220_4 are bent and arranged several times, the first electrode 210_4 and the second electrode 220_4 can be partially stacked on top of each other in the thickness direction. According to one embodiment, in the display device 10_4, the first electrode 210_4 and the second electrode 220_4 can be disposed in different layers, and another insulating layer can be further disposed between the first electrode 210_4 and the second electrode 220_4.

[0245] Figure 16 It is along Figure 15 A sectional view taken from line VI-VI'.

[0246] Reference Figure 16 In a display device 10_4 according to one embodiment, the first insulating layer 510_4 may include a first layer 510A_4 and a second layer 510B_4, the second electrode 220_4 may be disposed below the first layer 510A_4, and the first electrode 210_4 may be disposed between the first layer 510A_4 and the second layer 510B_4. Figure 16 The display device 10_4 and Figure 3 The difference in the embodiment of the display device 10 is that the first electrode 210_4 and the second electrode 220_4 are disposed in different layers, and the first insulating layer 510_4 is formed of multiple layers. In the following, repeated descriptions will be omitted, and the description will be based on the differences from the above.

[0247] In the display device 10_4, such as Figure 16 As shown, since the first electrode 210_4 and the second electrode 220_4 are disposed in different layers, the first electrode 210_4 and the second electrode 220_4 can be partially stacked on each other in the thickness direction.

[0248] The second electrode 220_4 can be directly mounted on the first inner dam 410 or the second inner dam 420. Figure 16In the diagram, the second electrode 220_4 is shown as being disposed on the second inner embankment 420, but the invention is not limited thereto. Since the second electrode 220_4 can be coupled with... Figure 3 The second electrode 220 is similarly configured, so its detailed description will be omitted.

[0249] The first layer 510A_4 can be disposed on the first inner dam 410 or the second inner dam 420 and the second electrode 220_4. The first layer 510A_4 can be configured to cover the second electrode 220_4, and can be connected with... Figure 3 The first insulating layer 510 is similarly arranged.

[0250] The first electrode 210_4 can be disposed on the first inner dam 410 or the second inner dam 420 on the first layer 510A_4. Figure 16 In the figure, the first electrode 210_4 is shown as being disposed on the first inner embankment 410, but the invention is not limited thereto. Although not shown in the figure, the first electrode 210_4 and the second electrode 220_4 may be partially stacked on top of each other in the thickness direction, but may not be directly connected to each other because the first layer 510A_4 is disposed between them.

[0251] The second layer 510B_4 can be disposed on the first layer 510A_4 and the first electrode 210_4. The second layer 510B_4 and the first layer 510A_4 can be disposed in substantially the same shape, but can have partially different shapes because the first electrode 210_4 is disposed between them. The light-emitting element 300 can be disposed directly on the second layer 510B_4 between the first electrode 210_4 and the second electrode 220_4.

[0252] The first insulating layer 510_4 may include openings OP1 and OP2 that expose portions of the upper surfaces of the first electrode 210_4 and the second electrode 220_4, such that the first contact electrode 261_4 and the second contact electrode 262_4 can contact the first electrode 210_4 and the second electrode 220_4, respectively. In the first insulating layer 510_4, the first opening OP1, exposing a portion of the upper surface of the first electrode 210_4, may be formed in the region overlapping with the first contact electrode 261_4. In the first opening OP1, a portion of the second layer 510B_4 may be removed to expose a portion of the upper surface of the first electrode 210_4. The first contact electrode 261_4 can directly contact the first electrode 210_4 exposed through the first opening OP1.

[0253] Furthermore, in the first insulating layer 510_4, a second opening OP2 exposing a portion of the upper surface of the second electrode 220_4 can be formed in the region overlapping with the second contact electrode 262_4. In the second opening OP2, portions of the first layer 510A_4 and the second layer 510B_4 can be removed to expose a portion of the upper surface of the second electrode 220_4. The second contact electrode 262_4 can then directly contact the second electrode 220_4 exposed through the second opening OP2.

[0254] According to one embodiment, in the display device 10_4, the first insulating layer 510_4 includes multiple layers 510A_4 and 510B_4, such that the first electrode 210_4 and the second electrode 220_4 can be disposed in different layers.

[0255] Figure 17 This is a plan view showing the electrode structure of a display device according to another embodiment.

[0256] Reference Figure 17 In a display device 10_5 according to one embodiment, the first electrode 210_5 and the second electrode 220_5 include a greater number of electrode extensions 210S_5 and 220S_5 and a greater number of electrode bends 210R_5 and 220R_5, allowing for the formation of a greater number of electrode unit portions EU_5. Furthermore, the electrode unit portions EU_5 do not necessarily need to be arranged in one direction, and can be arranged in different directions. Figure 17 In the display device 10_5, the electrode unit EU_5 can be arranged on the first direction DR1 and the second direction DR2. Therefore, the first inner wall 410_5 and the second inner wall 420_5 can be provided in greater quantities, and the number of light-emitting elements 300 provided in the predetermined area can be increased. Figure 17 The display device 10_5 and Figure 15 The difference between the display device 10_4 in the embodiment is that a greater number of electrode unit portions EU_5 can be formed. Repeated descriptions will be omitted below.

[0257] Meanwhile, in the display device 10, when the first electrode 210 and the second electrode 220 are configured to surround a predetermined area to ensure that a space for the light-emitting element 300 is disposed therein, the shape of each of the first electrode 210 and the second electrode 220 can be modified differently.

[0258] Figures 18 to 20 These are plan views showing the electrode structure of a display device according to another embodiment.

[0259] First, refer to Figure 18In a display device 10_6 according to one embodiment, unlike the first electrode 210_6, the second electrode 220_6 may have a shape extending in one direction without including an electrode bend. Furthermore, in the first electrode 210_6, the first electrode extension 210S_6 and the first electrode bend 210R_6 may be configured to surround a predetermined region relative to the second electrode 220_6. Therefore, an electrode unit EU_6 may be formed by the second electrode 220_6, the first electrode extension 210S_6 spaced apart from the second electrode 220_6, and the two first electrode bends 210R_6. Figure 18 The display device 10_6 and Figure 15 The difference in the embodiment of the display device 10_4 is that the structures of the first electrode 210_6 and the second electrode 220_6 are different from each other. In the following description, repeated descriptions will be omitted, and the arrangement of the first electrode 210_6 and the second electrode 220_6 will be described.

[0260] like Figure 2 As shown in the display device 10, the second electrode 220_6 can be configured to extend in one direction (e.g., the second direction DR2). A detailed description of it will be omitted.

[0261] The first electrode 210_6 may include a first electrode extension 210S_6 extending in the second direction DR2 and first electrode bending portions 210R_6 bending from both sides of the first electrode extension 210S_6 in the first direction DR1. The first electrode extension 210S_6 may be spaced apart from the second electrode 220_6 in the first direction DR1, and the first electrode bending portions 210R_6 may be bent toward the second electrode 220_6. Therefore, the second electrode 220_6, the first electrode extension 210S_6, and the two first electrode bending portions 210R_6 may form an electrode unit portion EU_6 to form a region in which a light-emitting element 300 may be disposed.

[0262] Simultaneously, the first electrode 210_6 may also include a first electrode connection portion 210B_6, which is configured to interconnect the first electrode bends 210R_6 of adjacent electrode unit portions EU_6. ​​The first electrode 210_6 may also include the first electrode connection portion 210B_6 to integrate into a single electrode line, and electrical signals can be transmitted through a first contact hole CT1. However, the invention is not limited thereto.

[0263] Reference Figure 19In a display device 10_7 according to one embodiment, the first electrode connection portion can be omitted from the first electrode 210_7, and the display device 10_7 may include a separate first electrode 210_7 for each electrode unit portion EU_7. In this case, an electrical signal can be transmitted through the first contact hole CT1 to the first electrode bend 210R_7 of each electrode unit portion EU_7.

[0264] In addition, refer to Figure 20 In a display device 10_8 according to one embodiment, the first electrode 210_8 may include a first electrode extension 210S_8, which may be spaced apart from the second electrode 220_8, and a plurality of first electrode bends 210R_8 may all have a shape that bends toward the second electrode 220_8. In this case, the first electrode extension 210S_8 and the plurality of first electrode bends 210R_8 may be integrally formed into a single first electrode 210_8. Figure 19 and Figure 20 The display devices 10_7 and 10_9 and Figure 18 The difference between the display device 10_6 and the display device 10_6 is that the first electrodes 210_7 and 210_8 have different shapes. Repeated descriptions will be omitted below.

[0265] Figure 21 This is a plan view showing the electrode structure of a display device according to another embodiment.

[0266] Reference Figure 21 In a display device 10_9 according to one embodiment, a first electrode 210_9 may be configured to have a shape surrounding a predetermined space, and a second electrode 220_9 may be configured to pass through said space. The first electrode 210_9 includes a portion extending in a first direction DR1 and a portion extending in a second direction DR2, such that a light-emitting element 300 can be disposed in the space surrounded by said portions. Furthermore, the second electrode 220_9 may be configured to extend in the second direction DR2 while passing through the center of said space, and a plurality of light-emitting elements 300 may be disposed in the space surrounded by the first electrode 210_9. Figure 21 The display device 10_9 and Figure 18 The difference between the display device 10_6 in the embodiment is that the shape of the first electrode 210_9 is different. Other repeated descriptions will be omitted.

[0267] In summarizing the specific embodiments, those skilled in the art will understand that many variations and modifications can be made to the preferred embodiments without fundamentally departing from the principles of the invention. Therefore, the preferred embodiments of the invention disclosed are used only in a general and descriptive sense and not for limiting purposes.

Claims

1. A display device, the display device comprising: The first electrode is configured to extend in a first direction; The second electrode is configured to extend in the first direction and be spaced apart from the first electrode in a second direction that intersects the first direction; A light-emitting element has a shape extending in one direction and is disposed between the first electrode and the second electrode, such that the one direction is parallel to the first direction or the second direction; The first contact electrode has a shape extending upward in a third direction intersecting the first direction and the second direction, and includes at least a portion disposed on the first electrode; as well as The second contact electrode has a shape extending upward from the third direction, is configured to be spaced apart from the first contact electrode in a fourth direction intersecting the third direction, and includes at least a portion disposed on the second electrode. Wherein, the first contact electrode is in contact with one side of the light-emitting element, and The second contact electrode is in contact with the other side of the light-emitting element.

2. The display device according to claim 1, wherein, Each of the first contact electrode and the second contact electrode has a shape extending upward in the third direction, the third direction forming a first tilt angle with the first electrode and the second electrode along the first direction in which they extend.

3. The display device according to claim 2, wherein, The first tilt angle is in the range of 10° to 80°.

4. The display device according to claim 1, wherein, The light-emitting element includes a first end surface and a second end surface in one direction. The first contact electrode contacts a portion of the first end surface, and The second contact electrode is in contact with a portion of the second end surface.

5. The display device according to claim 4, wherein, The light-emitting element further includes a third end surface and a fourth end surface in another direction intersecting the first direction. The first contact electrode is in partial contact with the third end surface, and The second contact electrode is in partial contact with the fourth end surface.

6. The display device according to claim 5, wherein, The light-emitting element includes a first semiconductor layer, a second semiconductor layer, and an active layer disposed between the first semiconductor layer and the second semiconductor layer. The light-emitting element includes a first light-emitting element and a second light-emitting element. The first light-emitting element is configured such that one surface of the active layer faces the first direction, and the second light-emitting element is configured such that one surface of the active layer faces the second direction.

7. The display device according to claim 6, wherein, In the first light-emitting element, the lower surface of the first semiconductor layer includes a second end surface that contacts the second contact electrode.

8. The display device according to claim 6, wherein, In the second light-emitting element, the lower surface of the first semiconductor layer includes the fourth end surface that contacts the second contact electrode.

9. The display device according to claim 1, wherein, In the light-emitting element, a first length measured in the first direction and a second length measured in the second direction are defined, and The separation distance between the first contact electrode and the second contact electrode satisfies the following equation 1. [Equation 1] DC≤LDsinθ c +HDcosθ c -2LCDsinθ c Wherein, "DC" refers to the separation distance between the first contact electrode and the second contact electrode, "LD" refers to the first length of the light-emitting element, "HD" refers to the second length of the light-emitting element, "LCD" refers to the length of the contact area where one end surface of the light-emitting element contacts the first contact electrode or the second contact electrode, and "θ" refers to the length of the contact area. c "Refers to the first tilt angle between the extending directions of the first contact electrode and the second contact electrode and the extending directions of the first electrode and the second electrode.

10. The display device according to claim 9, wherein, The second length of the light-emitting element is greater than the separation distance between the first electrode and the second electrode.

11. The display device according to claim 9, wherein, In the light-emitting element, the first length is equal to the second length.

12. The display device according to claim 11, wherein, The width of each of the first and second contact electrodes is at least greater than the value obtained by dividing the length of the contact area by the sine of the first tilt angle.

13. The display device according to claim 11, wherein, The length of each of the first contact electrode and the second contact electrode is at least greater than the value obtained by dividing the length of the contact region by the cosine of the first tilt angle.

14. The display device according to claim 9, wherein, In the light-emitting element, the first length is greater than the second length.

15. A display device, the display device comprising: The first electrode includes a portion extending in the first direction; The second electrode includes a portion extending in the first direction and is configured to be spaced apart from and facing the first electrode in a second direction intersecting the first direction; A light-emitting element is disposed between the first electrode and the second electrode; A first contact electrode has a shape extending in a third direction and includes at least a portion disposed on the first electrode, the third direction forming a first tilt angle with the first direction; as well as The second contact electrode has a shape extending upward from the third electrode, is configured to be spaced apart from the first contact electrode, and includes at least a portion disposed on the second electrode. The first contact electrode is in contact with one side of the light-emitting element. The second contact electrode contacts the other side of the light-emitting element, and The first tilt angle is in the range of 10° to 80°.

16. The display device according to claim 15, wherein, The first electrode includes a first electrode extension portion and a first electrode connection portion, wherein the width of the first electrode connection portion measured in the second direction is smaller than the width of the first electrode extension portion measured in the second direction. The second electrode includes a second electrode extension and a second electrode connection, wherein the width of the second electrode connection measured in the second direction is smaller than the width of the second electrode extension measured in the second direction. The first separation distance between the first electrode extension and the second electrode extension is smaller than the second separation distance between the first electrode connection and the second electrode connection.

17. The display device according to claim 16, wherein, The light-emitting element is disposed between the first electrode extension portion and the second electrode extension portion. The first contact electrode contacts one side of the light-emitting element on the first electrode extension, and The second contact electrode contacts the other side of the light-emitting element on the second electrode extension.

18. The display device according to claim 17, wherein, The length of each of the first electrode extension and the second electrode extension, measured in the first direction, is greater than the length of the light-emitting element measured in the first direction and smaller than the sum of the length of the light-emitting element and the length of the portion where one end surface of the light-emitting element contacts the first contact electrode.

19. The display device according to claim 15, wherein, The first electrode includes a first electrode extension extending in the first direction and a first electrode bend extending from the first electrode extension in the second direction. The first electrode extension is configured to be spaced apart from the second electrode in the second direction. At least a portion of the bent portion of the first electrode is configured to overlap with the second electrode, and The light-emitting element is disposed between the first electrode extension, the first electrode bend, and the second electrode.

20. The display device according to claim 19, wherein, The second electrode includes a second electrode extension extending in the first direction and a second electrode bend extending from the second electrode extension in the second direction. The second electrode extension is configured to be spaced apart from the first electrode extension. The second electrode bend is configured to be spaced apart from the first electrode bend, and The light-emitting element is disposed between the first bent portion of the electrode and the second bent portion of the electrode.

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