Display device

Abstract

This application relates to a display device. The display device includes a substrate and pixels on the substrate. Each pixel has an alignment region and an alignment region extending around the periphery of the alignment region, and the alignment region has a first alignment region and a second alignment region spaced apart from the first alignment region in a first direction. Each pixel includes: a first electrode and a second electrode extending across the alignment region in the first direction and spaced apart from each other; a first dam extending in the alignment region and along the boundary of the pixel; an alignment control layer including a first alignment control pattern spaced apart from the first dam in the alignment region between the first and second alignment regions; and a first light-emitting element in the first alignment region between the first and second electrodes.

Description

[0001] Cross-reference to related applications

[0002] This application claims priority and benefit to Korean Patent Application No. 10-2020-0080972, filed on July 1, 2020, with the Korean Intellectual Property Office, the entire disclosure of which is incorporated herein by reference. Technical Field

[0003] The embodiments of this disclosure relate to display devices. Background Technology

[0004] With the development of multimedia, display devices have become increasingly important. Therefore, various types (or categories) of display devices are being used, such as organic light-emitting diode (OLED) displays and liquid crystal displays (LCDs).

[0005] A display device is a device for displaying (or configured to display) images and typically includes a display panel, such as an organic light-emitting display panel or a liquid crystal display panel. When the display panel is a light-emitting display panel (e.g., a self-emitting display panel), the display panel includes light-emitting elements such as light-emitting diodes (LEDs), for example, organic light-emitting diodes (OLEDs) that use (or include) organic materials as fluorescent materials or inorganic LEDs that use (or include) inorganic materials as fluorescent materials. Summary of the Invention

[0006] Embodiments of this disclosure provide a display device in which an alignment control pattern is disposed in an misalignment area between a first electrode and a second electrode to prevent light-emitting elements from being disposed in the misalignment area, thereby reducing the number of light-emitting elements disposed in (and lost) in the misalignment area.

[0007] Embodiments of this disclosure also provide a display device in which an alignment control pattern disposed in an alignment area and a first dam are spaced apart from each other to form an ink impact area, such that multiple alignment areas are connected to each other, thereby making it relatively easy to control the ink impact position in an inkjet process.

[0008] However, the aspects and features of this disclosure are not limited to those set forth herein. These and other aspects and features of the disclosure will become more apparent to those skilled in the art upon reference to the following detailed description of the disclosure.

[0009] According to embodiments of the present disclosure, a display device includes a substrate and pixels on the substrate. Each pixel has an alignment region and an alignment region extending around the periphery of the alignment region, and the alignment region has a first alignment region and a second alignment region spaced apart from the first alignment region in a first direction. The pixel includes: a first electrode and a second electrode extending across the alignment region in the first direction and spaced apart from each other; a first dam extending in the alignment region and along the boundary of the pixel; an alignment control layer including a first alignment control pattern spaced apart from the first dam in the alignment region between the first and second alignment regions; and a first light-emitting element in the first alignment region between the first and second electrodes.

[0010] The pixel may further include: a first contact electrode on a first electrode in a first alignment region and in contact with a first end of the first light-emitting element; and a second contact electrode spaced apart from the first contact electrode. The second contact electrode may have a first region on a second electrode in the first alignment region and in contact with a second end of the first light-emitting element, a second region on a first electrode in the second alignment region, and a third region in an unaligned region connecting the first region of the second contact electrode and the second region of the second contact electrode.

[0011] The pixel may further include: a second light-emitting element, located in the second alignment region between the first and second electrodes; and a third contact electrode, having a first region on the second electrode in the second alignment region. The third contact electrode may be spaced apart from the first and second contact electrodes, a second region of the second contact electrode may contact a first end of the second light-emitting element, and a first region of the third contact electrode may contact a second end of the second light-emitting element.

[0012] The first light-emitting element and the second light-emitting element can be connected in series with each other.

[0013] The pixel may also include a third light-emitting element and a fourth contact electrode. The alignment region may have a third alignment region spaced apart from the second alignment region in a first direction, the third light-emitting element may be located between the first electrode and the second electrode in the third alignment region, the fourth contact electrode may be located on the second electrode in the third alignment region, and the fourth contact electrode may be spaced apart from the first contact electrode to the third contact electrode.

[0014] The third contact electrode may have a second region on the first electrode in the third alignment region and a third region in the non-alignment region to connect the first region and the second region of the third contact electrode. The second region of the third contact electrode may contact the first end of the third light-emitting element, and the fourth contact electrode may contact the second end of the third light-emitting element.

[0015] The first to the third light-emitting elements can be connected in series with each other.

[0016] The alignment control layer may further include a second alignment control pattern in the non-alignment region between the second alignment region and the third alignment region. The second alignment control pattern may be spaced apart from the first dam.

[0017] A portion of the third region of the second contact electrode may overlap with the first alignment control pattern in the thickness direction of the substrate.

[0018] The first alignment control pattern can be between the first electrode and the second electrode.

[0019] Each of the first dike and the alignment control layer may include a hydrophobic material.

[0020] The first dike and the alignment control layer may contain the same material.

[0021] According to embodiments of the present disclosure, a display device includes: a pixel having a plurality of alignment regions spaced apart from each other in a first direction and an unaligned region other than the plurality of alignment regions; a plurality of electrodes extending in the pixel in the first direction and spaced apart from each other; a plurality of light-emitting elements between the plurality of electrodes such that at least one end of each of the plurality of light-emitting elements is located on any one of the plurality of electrodes in each of the plurality of alignment regions; a first dam along the boundary of the pixel in the unaligned region; and a plurality of alignment control patterns spaced apart from the first dam in the unaligned region between the plurality of alignment regions, wherein the plurality of alignment control patterns are spaced apart from each other, and at least a portion of each of the plurality of alignment control patterns overlaps with the region between the plurality of electrodes in the thickness direction.

[0022] Each of the first dike and alignment control patterns includes a hydrophobic material.

[0023] The display device also includes an insulating layer on each of the plurality of light-emitting elements in a plurality of alignment regions and exposing both ends of each of the plurality of light-emitting elements, wherein the insulating layer and the plurality of alignment control patterns are spaced apart from each other.

[0024] According to embodiments of the present disclosure, a display device includes: a substrate; a pixel having an alignment region and an unaligned region extending around the periphery of the alignment region, the alignment region having a first alignment region and a second alignment region spaced apart from each other; a first electrode on the substrate; a second electrode on the substrate and spaced apart from the first electrode; a first dam along the boundary of the pixel in the unaligned region; an alignment control pattern on the substrate and in the unaligned region between the first and second electrodes, the alignment control pattern being spaced apart from the first dam; and a light-emitting element. The light-emitting element includes a plurality of first light-emitting elements in the first alignment region between the first and second electrodes and a plurality of second light-emitting elements in the second alignment region between the first and second electrodes.

[0025] The height from the surface of the substrate to the upper surface of the first dam can be greater than or equal to the height from the surface of the substrate to the upper surface of the alignment control pattern.

[0026] The width of the alignment control pattern can be greater than the length of each light-emitting element.

[0027] The display device may further include: a first contact electrode that contacts a first end of a plurality of first light-emitting elements; a second contact electrode that contacts a second end of a plurality of first light-emitting elements and a first end of a plurality of second light-emitting elements; and a third contact electrode that contacts a second end of a plurality of second light-emitting elements. The first to third contact electrodes may be spaced apart from each other, and the second contact electrode may connect the plurality of first light-emitting elements and the plurality of second light-emitting elements in series.

[0028] The second contact electrode may have a first region in the first alignment region that contacts the second ends of a plurality of first light-emitting elements, a second region in the second alignment region that contacts the first ends of a plurality of second light-emitting elements, and a third region in the unaligned region between the first alignment region and the second alignment region that connects the first region and the second region of the second contact electrode.

[0029] In the display device according to the embodiment, an alignment control pattern is arranged between the first electrode and the second electrode in the misalignment area to prevent (or substantially prevent) the light-emitting elements from being aligned in the misalignment area, and thus reduce the number of light-emitting elements set and lost in the misalignment area.

[0030] In the display device according to the embodiment, the alignment control pattern and the first dam in the misalignment area are spaced apart from each other to form an ink impact area, such that multiple alignment areas are connected to each other. This makes it relatively easy to control the ink impact position during the inkjet process, thereby improving the manufacturing process efficiency of the inkjet process during the manufacturing process of the display device.

[0031] However, the aspects and features of this disclosure are not limited to those set forth herein. The above and other aspects and features of this disclosure will become more apparent to those skilled in the art upon reference to the following specification and claims. Attached Figure Description

[0032] These and / or other aspects and features of this disclosure will become apparent and more readily understood in conjunction with the accompanying drawings and the following description of the embodiments, in which:

[0033] Figure 1 This is a schematic plan view of a display device according to an embodiment;

[0034] Figure 2 yes Figure 1 The diagram shows the pixel layout of the display device.

[0035] Figure 3 yes Figure 2 The diagram shows a planar layout of the subpixels of the pixels in the display device.

[0036] Figure 4A It is along Figure 3 A sectional view taken by line IV-IV';

[0037] Figure 4B According to another embodiment, along Figure 3 A sectional view taken by line IV-IV';

[0038] Figure 5 It is along Figure 3 A sectional view taken by line V-V';

[0039] Figure 6A It is along Figure 3 A sectional view taken by line VI-VI';

[0040] Figure 6B According to another embodiment, along Figure 3 A sectional view taken by line VI-VI';

[0041] Figure 7 This is a schematic diagram of a light-emitting element according to an embodiment;

[0042] Figure 8 yes Figure 4A An enlarged sectional view of region A;

[0043] Figure 9 It is along Figure 3 A sectional view taken from lines IXa-IXa', IXb-IXb', and IXc-IXc';

[0044] Figure 10 It is along Figure 3 A sectional view taken by line X-X';

[0045] Figures 11 to 13 This is a cross-sectional view showing some steps of the manufacturing process of a display device according to an embodiment;

[0046] Figure 14 yes Figure 13 The planar layout diagram of the sub-pixels shown;

[0047] Figures 15 to 17 This is a cross-sectional view showing some steps of the manufacturing process of a display device according to an embodiment;

[0048] Figure 18 It is according to another embodiment along Figure 3 A sectional view taken by line X-X';

[0049] Figure 19 It is according to another embodiment along Figure 3 A sectional view taken by line X-X';

[0050] Figure 20 It is according to another embodiment along Figure 3 A sectional view taken by line X-X';

[0051] Figure 21 It is a planar layout diagram of the subpixels of a display device according to an embodiment;

[0052] Figure 22 It is along Figure 21 A sectional view taken from line XXII-XXII';

[0053] Figure 23 It is a planar layout diagram of the subpixels of a display device according to an embodiment;

[0054] Figure 24 It is shown Figure 23 A plan view showing the arrangement of alignment control patterns in the diagram;

[0055] Figure 25 yes Figure 23 The cross-sectional view of the display device shown; and

[0056] Figure 26 It is a planar layout diagram of the subpixels of a display device according to an embodiment. Detailed Implementation

[0057] This disclosure will now be described more fully below with reference to the accompanying drawings, in which exemplary embodiments of the disclosure are illustrated. However, this disclosure may be implemented in various forms and should not be construed as limited to the embodiments described herein. Rather, these embodiments are provided so that this disclosure will be thorough and complete, and will fully convey the scope of this disclosure to those skilled in the art.

[0058] It should be understood that when an element or layer is described as being "on," "connected to," or "linked to" another element or layer, it can be directly on, directly connected to, or directly linked to the other element or layer, or one or more intermediary elements or layers may be present. When an element or layer is described as being directly "on," "directly connected to," or "directly linked to" another element or layer, no intermediary element or layer is present. For example, when a first element is described as being "linked" or "connected" to a second element, the first element can be directly linked or directly connected to the second element, or the first element can be indirectly linked or indirectly connected to the second element via one or more intermediary elements.

[0059] In the accompanying drawings, the dimensions of various elements, layers, etc., may be exaggerated for clarity. The same reference numerals denote the same elements. As used herein, the term "and / or" includes any and all combinations of one or more of the associated listed items. Furthermore, when describing embodiments of the invention, the use of "may" means "one or more embodiments of the invention." When following a list of elements, expressions such as "at least one of..." modify the entire list of elements, not individual elements in the list. Additionally, the term "exemplary" is intended to refer to an example or illustration. As used herein, the terms "use," "using," and "used" may be considered synonymous with the terms "utilize," "utilizing," and "utilized," respectively. As used herein, the terms "substantially," "about," and similar terms are used as approximate terms rather than terms of degree and are intended to allow for inherent deviations in measurements or calculations that will be recognized by those skilled in the art.

[0060] It should be understood that although the terms first, second, third, etc., may be used herein to describe various elements, components, regions, layers, and / or portions, these elements, components, regions, layers, and / or portions should not be limited by these terms. These terms are used to distinguish one element, component, region, layer, or portion from another element, component, region, layer, or portion. Therefore, without departing from the teachings of the exemplary embodiments, the first element, first component, first region, first layer, or first portion discussed below may be referred to as a second element, second component, second region, second layer, or second portion.

[0061] For ease of description, spatial relative terms such as “below,” “under,” “lower,” “above,” and “upper” may be used herein to describe the relationship between one element or feature and another element(s) as shown in the figures. It should be understood that, in addition to the orientation depicted in the figures, spatial relative terms are intended to include different orientations of the device in use or operation. For example, if the device in the figure is flipped, an element described as “below” or “under” other elements or features will subsequently be oriented “above” or “above” other elements or features. Therefore, the term “below” can include both above and below orientations. The device may be oriented in other ways (rotated 90 degrees or in other orientations), and the spatial relative descriptive terms used herein should be interpreted accordingly.

[0062] The terminology used herein is for the purpose of describing specific exemplary embodiments of the invention and is not intended to limit the exemplary embodiments described herein. As used herein, the singular forms “a” and “an” are intended to include the plural forms as well, unless the context clearly indicates otherwise. It should also be understood that, when used in this specification, the terms “includes,” “including,” “comprises,” and / or “comprising” designate the presence of the stated feature, integral, step, operation, element, and / or component, but do not exclude the presence or addition of one or more other features, integrals, steps, operations, elements, components, and / or groups thereof.

[0063] In the following description, embodiments will be described with reference to the accompanying drawings.

[0064] Figure 1 This is a schematic plan view of the display device 10 according to the embodiment.

[0065] Reference Figure 1 Display device 10 displays (e.g., configured to display) moving images and / or still images. Display device 10 can refer to any electronic device that includes a display screen. Examples of display devices 10 may include televisions, laptop computers, 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-books, portable multimedia players (PMPs), navigation devices, game consoles, digital cameras, and portable video cameras, each of which provides a display screen.

[0066] Display device 10 includes a display panel, which includes a display screen. Examples of display panels 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, and field emission display panels. In this document, display device 10 is described below as an example of an inorganic LED display panel. However, this disclosure is not limited thereto, and other display panels may be applied, as those skilled in the art will understand.

[0067] In the accompanying drawings, a first direction DR1, a second direction DR2, and a third direction DR3 are defined. The first direction DR1 and the second direction DR2 may be perpendicular to each other in a plane. The third direction DR3 may be perpendicular to (or orthogonal to) the plane containing the first direction DR1 and the second direction DR2. That is, the third direction DR3 is perpendicular to each of the first direction DR1 and the second direction DR2. As used herein, the third direction DR3 represents the thickness direction of the display device 10.

[0068] Display device 10 may have a rectangular planar shape with a long side and a short side, wherein the long side in the first direction DR1 may be longer than the short side in the second direction DR2. In a planar view, the corner where the long side and the short side of display device 10 intersect may be a right angle. However, this disclosure is not limited to this, and the corner may be rounded. Similarly, display device 10 is not limited to a rectangular planar shape and may be any suitable shape. For example, display device 10 may have other planar shapes, such as a square, a quadrilateral with rounded corners (e.g., vertices), other polygons, and a circle.

[0069] The display surface of the display device 10 may be disposed on its first side in the third direction DR3 (i.e., the thickness direction). Unless otherwise stated, as used herein, "above" refers to the first side in the third direction DR3 and the display direction, and "upper surface" refers to the surface facing the first side in the third direction DR3. Furthermore, "below" refers to the second side in the third direction DR3 and the direction opposite to the display direction, and "lower surface" refers to the surface facing the second side in the third direction DR3. Additionally, "left," "right," "up," and "down" refer to the orientation when the display device 10 is viewed in a plan view. For example, "right" refers to the first side in the first direction DR1, "left" refers to the second side in the first direction DR1, "up" refers to the first side in the second direction DR2, and "down" refers to the second side in the second direction DR2.

[0070] Display device 10 may include a display area DPA and a non-display area NDA. The display area DPA may be an area that provides a screen (e.g., an area that displays an image), and the non-display area NDA may be an area that does not provide a screen (e.g., an area that does not display an image). The display area DPA may be referred to as the active area, and the non-display area NDA may be referred to as the inactive area.

[0071] The shape of the display area DPA can correspond to (e.g., follow) the shape of the display device 10. For example, the display area DPA can have a rectangular planar shape similar to the overall shape of the display device 10. The display area DPA can typically occupy the center of the display device 10.

[0072] The display area DPA may include a plurality of pixels PX. The pixels PX may be arranged in a matrix. In a planar view, each of the pixels PX may have a rectangular or square shape. However, this disclosure is not limited thereto, and each of the pixels PX may have a rhomboid planar shape, each side of which is inclined relative to a direction (e.g., relative to a first direction DR1 and / or a second direction DR2). The pixels PX may be arranged in stripes or... (A registered trademark of Samsung Display Co., Ltd., South Korea) Arranged alternately.

[0073] The non-display area NDA can be configured to surround the display area DPA (e.g., it can extend around the display area DPA). The non-display area NDA can completely or partially surround the display area DPA. In an exemplary embodiment, the display area DPA can be rectangular, and the non-display area NDA can be configured to be adjacent to the four sides of the display area DPA (e.g., it can extend around the four sides of the display area DPA). The non-display area NDA can form the border of the display device 10. In the non-display area NDA, pads (e.g., pad portions) can be provided for wiring and circuit drivers included in the display device 10 and / or for pads on which external devices are mounted.

[0074] Figure 2 This is a planar layout diagram of the pixels PX of the display device 10 according to the embodiment, and Figure 3 yes Figure 2 The planar layout diagram of the sub-pixels SPX of the pixel PX of the display device 10 shown.

[0075] Reference Figure 2The pixel PX of the display device 10 may include multiple sub-pixels SPX (e.g., SPX1, SPX2, SPX3). In an embodiment, the pixel PX may include a first sub-pixel SPX1, a second sub-pixel SPX2, and a third sub-pixel SPX3. The first sub-pixel SPX1 may emit light of a first color, the second sub-pixel SPX2 may emit light of a second color, and the third sub-pixel SPX3 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, this disclosure is not limited to this, and the sub-pixels SPX may emit light of the same color. Although in Figure 2 The illustration shows an implementation in which one pixel PX comprises three sub-pixels SPX (SPX1 to SPX3), but this disclosure is not limited thereto. For example, a pixel PX may comprise more than three sub-pixels SPX.

[0076] Reference Figure 2 and Figure 3 Each sub-pixel SPX of the display device 10 may have an emitting region EMA and a non-emitting region. The emitting region EMA may be the area from which light of a certain wavelength band (e.g., light of a specific wavelength band) is emitted from the light-emitting element ED (described in more detail below) at its output, and the non-emitting region may be the area from which no light is emitted. The non-emitting region may include a cut-out region CBA.

[0077] In a plan view, the emission region EMA can be located at the center of the sub-pixel SPX. The sub-pixel SPX of the display device 10 can include multiple light-emitting elements ED (described in more detail below), and the emission region EMA can include a region where the light-emitting elements ED are disposed and a region adjacent to the light-emitting elements ED to which light emitted from the light-emitting elements ED is output. The emission region EMA can have a region in which light emitted from the light-emitting elements ED is reflected or refracted by other components and output on a third-direction DR3 of the display device 10. For example, the light-emitting elements ED can be disposed in each sub-pixel SPX, and the region where the light-emitting elements ED are disposed and the region adjacent to that region can form the emission region EMA.

[0078] The emitter area EMA may have an alignment area AA and an unaligned area NAA. The alignment area AA may include multiple alignment areas AA1, AA2, AA3 spaced apart from each other, and the unaligned area NAA may surround the alignment area AA (or extend around the periphery of the alignment area AA). For example, the unaligned area NAA may be a region outside the alignment area AA in the emitter area EMA.

[0079] The alignment region AA can be a region where light-emitting elements ED are concentrated, and the misalignment region NAA can be a region where the distribution of light-emitting elements ED is relatively low. Light emitted from the light-emitting elements ED disposed in the alignment region AA reaches both the misalignment region NAA and the alignment region AA. Therefore, the emission region EMA can include both the alignment region AA and the misalignment region NAA.

[0080] The alignment region AA and the non-alignment region NAA can be regions distinguished by the number, distribution, or density of light-emitting elements ED per unit area. The shape or position of the alignment region AA and the non-alignment region NAA can be related to the shape or arrangement of the plurality of contact electrodes 310 to 340, the first embankment 610, and the alignment control pattern 620, which are described in more detail below.

[0081] Alignment area AA may include multiple alignment areas AA1, AA2, AA3 spaced apart from each other. Alignment areas AA1, AA2, AA3 may be spaced apart from each other along the second direction DR2.

[0082] The alignment region AA of each sub-pixel SPX may include a first alignment region AA1, a second alignment region AA2, and a third alignment region AA3. The first alignment regions AA1 to the third alignment regions AA3 may be arranged along the second direction DR2. The first alignment regions AA1 to the third alignment regions AA3 may be spaced apart from each other. Although in Figure 3 The illustration shows an implementation in which one of the sub-pixels SPX includes three alignment regions AA (AA1 to AA3), but this disclosure is not limited thereto. For example, in other embodiments, a sub-pixel SPX may include two or more alignment regions AA.

[0083] The light-emitting elements ED disposed in the alignment regions AA spaced apart from each other can be connected in series. For example, the light-emitting element ED disposed in the first alignment region AA1 can be connected in series with the light-emitting element ED disposed in the second alignment region AA2. Similarly, the light-emitting element ED disposed in the second alignment region AA2 can be connected in series with the light-emitting element ED disposed in the third alignment region AA3. However, this disclosure is not limited to this, and the light-emitting elements ED disposed in the same alignment region AA can be connected in parallel with each other, and the light-emitting elements ED disposed in adjacent alignment regions AA can be connected in series with each other.

[0084] The misaligned region NAA may surround the first alignment region AA1 to the third alignment region AA3 (or extend around the periphery of the first alignment region AA1 to the third alignment region AA3). The misaligned region NAA may include the region located between the first alignment region AA1 and the second alignment region AA2, and the region located between the second alignment region AA2 and the third alignment region AA3. Connections (e.g., series connections) between light-emitting elements ED disposed in adjacent alignment regions AA may exist (e.g., may be fabricated) in the misaligned region NAA located between the alignment regions AA.

[0085] The non-emitting region can be a region where no light-emitting element (ED) is installed and no light is emitted from it, so the light emitted from the ED does not reach this region.

[0086] The non-emitting region may include a cut region CBA. In a planar view, the cut region CBA may be located below the emitting region EMA (e.g., in the direction opposite to the second direction DR2). The cut region CBA may be located between the emitting regions EMA of adjacent sub-pixels SPX in the second direction DR2. The length of the cut region CBA in the first direction DR1 may be greater than the length of the emitting region EMA in the first direction DR1. The length of the cut region CBA in the second direction DR2 may be less than the length of the emitting region EMA in the second direction DR2. However, this disclosure is not limited thereto, and, for example, depending on the shape of the first embankment 610, the cut region CBA may have different planar shapes and dimensions (described in more detail below).

[0087] Multiple emission areas (EMAs) and multiple cut areas (CBAs) can be arranged in the display area (DPA) of the display device 10. For example, the emission areas (EMAs) and cut areas (CBAs) can be arranged repeatedly along a first direction (DR1) and alternately along a second direction (DR2).

[0088] The cut region CBA can be a region in which the plurality of electrodes 210 and 220 included in each sub-pixel SPX are separated from their corresponding electrodes disposed in adjacent sub-pixels SPX in the second direction DR2. The electrodes 210 and 220 disposed in each sub-pixel SPX can be partially disposed in the cut region CBA. Each electrode 210 or 220 of the sub-pixel SPX can be separated in the cut region CBA from its corresponding electrode disposed in the adjacent sub-pixel SPX in the second direction DR2.

[0089] Each sub-pixel SPX of the display device 10 may include electrodes 210 and 220, a first dam 610, a light-emitting element ED, contact electrodes 310 to 340, and one or more alignment control patterns 620. The display device 10 may also include a second dam (or a first sub-dam 410 and a second sub-dam 420).

[0090] The following will refer to Figure 2 and Figure 3 The planar arrangement and shape of electrodes 210 and 220, first dam 610, light-emitting element ED, contact electrodes 310 to 340, and alignment control pattern 620 included in the sub-pixel SPX of display device 10 are described in more detail below. The planar position and shape of each component will be briefly described below, and the connection relationships between the components will be described in more detail below with reference to other figures.

[0091] Electrodes 210 and 220 may include a first electrode 210 and a second electrode 220. The first electrode 210 and the second electrode 220 may extend in a second direction DR2 in a plan view, and may be spaced apart from each other and face each other in a first direction DR1.

[0092] In the plan view, the first electrode 210 may be disposed in the center of the sub-pixel SPX. The first electrode 210 may extend in the second direction DR2 in each sub-pixel SPX. The first electrode 210 may be configured to extend (or pass through) the first alignment region AA1 to the third alignment region AA3 and the unaligned region NAA located between the first alignment region AA1 and the third alignment region AA3.

[0093] In the plan view, the second electrode 220 can be disposed on the left and right sides of the sub-pixel SPX. The second electrode 220 can extend in each sub-pixel SPX along the second direction DR2. The second electrode 220 can be spaced apart from the first electrode 210 so as to face the first electrode 210 in the first direction DR1. The second electrode 220 can be configured to extend (or pass through) the first alignment region AA1 to the third alignment region AA3 and the unaligned region NAA located between the first alignment region AA1 and the third alignment region AA3.

[0094] The first electrode 210 and the second electrode 220 may extend in each sub-pixel SPX along the second direction DR2, and may be separated from the first electrode 210 and the second electrode 220 included in adjacent sub-pixels SPX at the cut region CBA along the second direction DR2. In the process of manufacturing the display device 10, the shape of the first electrode 210 and the second electrode 220 may be formed by cutting (e.g., separating) each electrode 210 or 220 in the cut region CBA after the light-emitting element ED is placed (or arranged). However, this disclosure is not limited thereto, and some electrodes 210 and 220 may extend in the second direction DR2 to (e.g., may extend continuously to) adjacent sub-pixels SPX, and may be integral with their corresponding electrodes in adjacent sub-pixels SPX, or either the first electrode 210 and the second electrode 220 may be separate from their corresponding electrodes in adjacent sub-pixels SPX.

[0095] In the accompanying drawings, a first electrode 210 and two second electrodes 220 are disposed in each sub-pixel SPX, with the first electrode 210 disposed between the second electrodes 220. However, this disclosure is not limited thereto. In some embodiments, the number of first electrodes 210 and second electrodes 220 disposed in each sub-pixel SPX may be increased, or only one first electrode 210 and one second electrode 220 may be disposed. Furthermore, the first electrode 210 and the second electrode 220 disposed in each sub-pixel SPX may not necessarily extend in one direction and may have various structures. For example, the first electrode 210 and the second electrode 220 may be partially curved or bent, or either electrode may extend around the other electrode (or around the periphery of the other electrode). The first electrode 210 and the second electrode 220 may have any suitable structure or shape, as long as they are at least partially spaced apart to face each other, such that an area is formed between them where a light-emitting element ED will be disposed.

[0096] Electrodes 210 and 220 can be electrically connected to the light-emitting element ED, and a voltage (e.g., a predetermined voltage) can be applied to each of electrodes 210 and 220 to cause the light-emitting element ED to emit light (e.g., cause the light-emitting element ED to emit light). For example, electrodes 210 and 220 can be electrically connected to the light-emitting element ED disposed in the first alignment region AA1 to the third alignment region AA3 through the first contact electrode 310 to the fourth contact electrode 340, which are described in more detail below, and the received electrical signals can be transmitted to the light-emitting element ED through the contact electrodes 310 to 340.

[0097] Furthermore, electrodes 210 and 220 can be used to form an electric field in the sub-pixel SPX to align the light-emitting element ED. The light-emitting element ED can be positioned between the first electrode 210 and the second electrode 220 by the electric field formed by the first electrode 210 and the second electrode 220 (or the electric field between the first electrode 210 and the second electrode 220). As will be described in more detail below, the light-emitting elements ED can be jetted (or deposited) onto the first electrode 210 and the second electrode 220 by an inkjet process while they are dispersed in ink. When ink including the dispersed light-emitting elements ED is jetted onto the first electrode 210 and the second electrode 220, an alignment signal is transmitted to the first electrode 210 and the second electrode 220 to generate an electric field. The light-emitting elements ED dispersed in the ink can be aligned between the first electrode 210 and the second electrode 220 by the electrophoretic force caused by the electric field generated between the first electrode 210 and the second electrode 220.

[0098] The first dike 610 may surround the boundary of each sub-pixel SPX (e.g., may extend around the boundary of each sub-pixel SPX). The first dike 610 may include portions (or parts) extending in the first direction DR1 and the second direction DR2 in the plan view to form a grid pattern throughout the display area DPA. The first dike 610 may be located at the boundary of each sub-pixel SPX to separate adjacent sub-pixels SPX.

[0099] The first dam 610 may surround the emission region EMA and the cut region CBA disposed in the sub-pixel SPX (e.g., it may extend around the periphery of the emission region EMA and the cut region CBA disposed in the sub-pixel SPX) to separate them from each other. The first electrode 210 and the second electrode 220 may extend in the second direction DR2 to intersect with the portion of the first dam 610 extending in the first direction DR1. The width of each portion of the first dam 610 extending in the second direction DR2 in the first direction DR1 may be different in each region. For example, in the portion of the first dam 610 extending in the second direction DR2, the segment disposed between adjacent emission regions EMA in the first direction DR1 may have a larger width than the segment disposed between adjacent cut regions CBA in the first direction DR1. However, this disclosure is not limited thereto.

[0100] During the manufacturing process of the display device 10, the first dike 610 can prevent or substantially prevent ink from overflowing into adjacent sub-pixels SPX during the inkjet printing process. The first dike 610 can separate the ink in which different light-emitting elements ED are dispersed for different sub-pixels SPX, such that the ink does not mix with each other. Even when each sub-pixel SPX includes the same light-emitting elements ED, during the manufacturing process of the display device 10, the first dike 610 can prevent or substantially prevent ink from overflowing into adjacent sub-pixels SPX during the inkjet printing process to maintain a uniform number of light-emitting elements ED in each sub-pixel SPX. The first dike 610 may include a hydrophobic material. As an example, the first dike 610 may include polyimide (PI).

[0101] Alignment control pattern 620 can be disposed in the non-alignment region NAA. Alignment control pattern 620 can be disposed in the non-alignment region NAA located between alignment regions AA. Alignment control pattern 620 can be disposed in the non-alignment region NAA located between alignment regions AA, between the first electrode 210 and the second electrode 220. Alignment control pattern 620 can be disposed in the non-alignment region NAA and can be spaced apart from the first dam 610. Alignment control pattern 620 may not be disposed in the alignment region AA.

[0102] The alignment control pattern 620 may include a first alignment control pattern 621 and a second alignment control pattern 622.

[0103] The first alignment control pattern 621 may be disposed in the non-alignment region NAA located between the first alignment region AA1 and the second alignment region AA2. For example, the first alignment control pattern 621 may be disposed in the non-alignment region NAA located between the first electrode 210 and the second electrode 220. The first alignment control pattern 621 may be disposed between the first electrode 210 and the second electrode 220 such that at least a portion of each first alignment control pattern 621 overlaps with (or is located in) the region between the first electrode 210 and the second electrode 220 on the third-direction DR3. The first alignment control pattern 621 may be disposed between the first electrode 210 and the second electrode 220, but at least a portion of each first alignment control pattern 621 may overlap with the first electrode 210 and / or the second electrode 220 on the third-direction DR3.

[0104] A sub-pixel SPX may include at least one first alignment control pattern 621. When multiple first electrodes 210 and / or multiple second electrodes 220 are provided in a sub-pixel SPX, the sub-pixel SPX may include multiple first alignment control patterns 621 respectively disposed between the first electrodes 210 and the second electrodes 220. The first alignment control patterns 621 may be spaced apart from each other. For example, the first alignment control patterns 621 may be spaced apart from each other in a first direction DR1.

[0105] In an exemplary embodiment, when a first electrode 210 and two second electrodes 220 are provided in a sub-pixel SPX, the sub-pixel SPX may include two first alignment control patterns 621 respectively disposed between the first electrode 210 and the two second electrodes 220. However, this disclosure is not limited thereto, and the number of first alignment control patterns 621 disposed in each sub-pixel SPX may be increased or decreased. In some embodiments, when a sub-pixel SPX includes a first electrode 210 and a second electrode 220, the sub-pixel SPX may include a first alignment control pattern 621 disposed between the first electrode 210 and the second electrode 220. In some embodiments, when a sub-pixel SPX includes a plurality of first electrodes 210 and a plurality of second electrodes 220 disposed between the plurality of first electrodes 210, the sub-pixel SPX may include a plurality of first alignment control patterns 621 disposed between the first electrodes 210 and the second electrodes 220.

[0106] The second alignment control pattern 622 may be disposed in the unaligned region NAA located between the second alignment region AA2 and the third alignment region AA3. The second alignment control pattern 622 may be spaced apart from the first alignment control pattern 621. For example, the second alignment control pattern 622 may be disposed in the unaligned region NAA located between the first electrode 210 and the second electrode 220. The second alignment control pattern 622 may be disposed between the first electrode 210 and the second electrode 220 such that at least a portion of each second alignment control pattern 622 overlaps (or is located in the region between the first electrode 210 and the second electrode 220) on the third-direction DR3. The second alignment control pattern 622 may be disposed between the first electrode 210 and the second electrode 220, but at least a portion of each second alignment control pattern 622 may overlap with the first electrode 210 and / or the second electrode 220 on the third-direction DR3.

[0107] A sub-pixel SPX may include at least one second alignment control pattern 622. When multiple first electrodes 210 and / or multiple second electrodes 220 are provided in a sub-pixel SPX, the sub-pixel SPX may include multiple second alignment control patterns 622 respectively disposed between the first electrodes 210 and the second electrodes 220. The second alignment control patterns 622 may be spaced apart from each other. For example, the second alignment control patterns 622 may be spaced apart from each other in a first direction DR1.

[0108] In an exemplary embodiment, when a first electrode 210 and two second electrodes 220 are provided in a sub-pixel SPX, the sub-pixel SPX may include two second alignment control patterns 622 respectively disposed between the first electrode 210 and the two second electrodes 220. However, this disclosure is not limited thereto, and as explained above in the description of the first alignment control pattern 621, the number of second alignment control patterns 622 disposed in each sub-pixel SPX may be increased or decreased.

[0109] exist Figure 2 and Figure 3 In this embodiment, the alignment control pattern 620 disposed in a sub-pixel SPX includes at least one first alignment control pattern 621 and at least one second alignment control pattern 622. However, this disclosure is not limited thereto. The number and arrangement of alignment control patterns 620 disposed in a sub-pixel SPX can vary depending on the number of alignment regions AA and the number of electrodes 210 and 220 disposed in the sub-pixel SPX. For example, a sub-pixel SPX may include more alignment regions AA. In such an embodiment, the sub-pixel SPX may include a plurality of alignment control patterns 620 separated from each other in the second direction DR2. Furthermore, as described above, a sub-pixel SPX may include a plurality of first electrodes 210 and / or a plurality of second electrodes 220 disposed between the plurality of first electrodes 210. In such an embodiment, the sub-pixel SPX may include a plurality of alignment control patterns 620 disposed between the first electrodes 210 and the second electrodes 220.

[0110] During the manufacturing process of the display device 10, the alignment control pattern 620 can prevent or substantially prevent the light-emitting element ED from being positioned in the misaligned region NAA of the sub-pixel SPX during the inkjet printing process. For example, as described above, the light-emitting element ED can be positioned (e.g., arranged) between the first electrode 210 and the second electrode 220 by an electric field formed between the first electrode 210 and the second electrode 220. The alignment control pattern 620 can be positioned in the misaligned region NAA in the region between the first electrode 210 and the second electrode 220 to prevent or substantially prevent the light-emitting element ED from being aligned (or positioned) in the misaligned region NAA, thereby reducing the number of lost (or disconnected or unconnected) light-emitting elements ED.

[0111] The alignment control pattern 620 may include a hydrophobic material. The alignment control pattern 620 may include the same material as the first dike 610. As an example, the alignment control pattern 620 may include polyimide (PI).

[0112] The light-emitting element ED can be disposed in each alignment region AA (AA1, AA2, or AA3). The light-emitting element ED can be disposed in the alignment region AA between the first electrode 210 and the second electrode 220. Although the light-emitting element ED is shown in the figures as disposed in the alignment region AA, at least some of the light-emitting elements ED can be further disposed in the non-alignment region NAA. The light-emitting element ED can be disposed on the third-party DR3 without overlapping with the alignment control pattern 620.

[0113] The light-emitting element ED can extend in one direction. The light-emitting elements ED can be spaced apart from each other in a second direction DR2 in which each electrode 210 or 220 extends in the plan view, and can be aligned substantially parallel to each other. The gap between the light-emitting elements ED is not particularly limited. Furthermore, the light-emitting elements ED can extend in one direction, and the direction in which each electrode 210 or 220 extends and the direction in which the light-emitting element ED extends can be substantially perpendicular to each other. However, this disclosure is not limited thereto, and the light-emitting elements ED can also extend in a direction not perpendicular to the direction in which each electrode 210 or 220 extends, but in a direction inclined to the direction in which each electrode 210 or 220 extends. The shape of each light-emitting element ED will now be described in more detail with reference to the other accompanying drawings.

[0114] Each of the light-emitting elements (ED) may include an active layer 36 (e.g., see...). Figure 7 The display device 10 may include light-emitting elements (EDs) that emit light of different wavelength bands. Therefore, the first sub-pixel SPX1, the second sub-pixel SPX2, and the third sub-pixel SPX3 may respectively emit light of a first color, a second color, and a third color. However, this disclosure is not limited thereto, and each of the sub-pixels SPX may include a light-emitting element ED having the same active layer 36 (e.g., the same active layer material) to emit light of substantially the same color.

[0115] The light-emitting element ED may include a light-emitting element ED disposed in a first alignment region AA1 (hereinafter referred to as the "first light-emitting element"), a light-emitting element ED disposed in a second alignment region AA2 (hereinafter referred to as the "second light-emitting element"), and a light-emitting element ED disposed in a third alignment region AA3 (hereinafter referred to as the "third light-emitting element"). The first light-emitting element ED, the second light-emitting element ED, and the third light-emitting element ED may be disposed in the first alignment region AA1 to the third alignment region AA3 respectively to contact contact electrodes 310 to 340 (described in more detail below). The first light-emitting element ED, the second light-emitting element ED, and the third light-emitting element ED may be connected in series with each other through contact electrodes 310 to 340.

[0116] A sub-pixel SPX may include a plurality of contact electrodes 310 to 340 spaced apart from each other. The contact electrodes 310 to 340 may be disposed in the emission region EMA. The contact electrodes 310 to 340 may include a first contact electrode 310, a second contact electrode 320, a third contact electrode 330, and a fourth contact electrode 340.

[0117] For ease of description, in the following description, the first end of the light-emitting element ED refers to the end disposed on the side facing the first electrode 210, and the second end of the light-emitting element ED refers to the end disposed on the side opposite to the side facing the first electrode 210 (i.e., the end disposed on the side facing the second electrode 220).

[0118] A first contact electrode 310 may be disposed on the first electrode 210 in a first alignment region AA1. In a plan view, the first contact electrode 310 may extend in the first alignment region AA1 along a second direction DR2. In a plan view, the first contact electrode 310 may extend in the first alignment region AA1 along a second direction DR2 and may terminate at a position spaced apart from the lower side (lower side in the figure) of the first alignment region AA1 so as not to extend into the second alignment region AA2. The first contact electrode 310 may extend above the first alignment region AA1 in the plan view (upper side in the figure) to also extend into the non-alignment region NAA (e.g., partially in the non-alignment region NAA). In the non-alignment region NAA, the first contact electrode 310 may be electrically connected to the first electrode 210 through a first opening OP1 (e.g., see 4A), the first opening OP1 overlapping with a first contact opening (e.g., a first contact hole) CT1 in a third direction DR3. This will be described in more detail below.

[0119] The first contact electrode 310 can contact the first end of the first light-emitting element ED. For example, the first contact electrode 310 can contact the first end of the first light-emitting element ED and the first electrode 210 to electrically connect them.

[0120] The second contact electrode 320 may include a first region 321, a second region 322, and a third region 323. The second contact electrode 320 may be configured to extend over the first alignment region AA1, the second alignment region AA2, and the unaligned region NAA located between them.

[0121] The first region 321 of the second contact electrode 320 can be disposed on the second electrode 220 within the first alignment region AA1. In the plan view, the first region 321 of the second contact electrode 320 can extend in the second direction DR2 within the first alignment region AA1.

[0122] The first region 321 of the second contact electrode 320 may be spaced apart from the first contact electrode 310 in the first alignment region AA1, so as to face the first contact electrode 310 in the first direction DR1. The first region 321 of the second contact electrode 320 may contact the second end of the first light-emitting element ED in the first alignment region AA1.

[0123] The second region 322 of the second contact electrode 320 may be disposed on the first electrode 210 within the second alignment region AA2. In plan view, the second region 322 of the second contact electrode 320 may extend in the second direction DR2 within the second alignment region AA2. In plan view, the second region 322 of the second contact electrode 320 may extend in the second direction DR2 within the second alignment region AA2, but may terminate at a position spaced apart from the lower side of the second alignment region AA2 so as not to extend into the third alignment region AA3.

[0124] The second region 322 of the second contact electrode 320 may be spaced apart from the first region 321 of the second contact electrode 320. The second region 322 of the second contact electrode 320 may contact the first end of the second light-emitting element ED in the second alignment region AA2.

[0125] The third region 323 of the second contact electrode 320 can be disposed in the unaligned region NAA located between the first alignment region AA1 and the second alignment region AA2. The third region 323 of the second contact electrode 320 in the unaligned region NAA can be connected to the first region 321 and the second region 322 of the second contact electrode 320. The third region 323 of the second contact electrode 320 can be a connecting electrode disposed in the unaligned region NAA to connect the first light-emitting element ED disposed in the first alignment region AA1 and the second light-emitting element ED disposed in the second alignment region AA2 in series.

[0126] In the plan view, the third region 323 of the second contact electrode 320 may extend in the unaligned region NAA located between the first alignment region AA1 and the second alignment region AA2 in the first direction DR1. A portion of the third region 323 of the second contact electrode 320 may overlap with the first alignment control pattern 621 in the third direction DR3.

[0127] The first region 321 to the third region 323 of the second contact electrode 320 can be integral (e.g., integrally formed) and can be formed to cover the first alignment region AA1, the misalignment region NAA, and the second alignment region AA2. Because the second contact electrode 320 contacts the second end of the first light-emitting element ED and the first end of the second light-emitting element ED, the first light-emitting element ED and the second light-emitting element ED can be connected in series with each other through the second contact electrode 320. The first region 321 and the second region 322 of the second contact electrode 320 can be contact electrodes that contact the light-emitting element ED in the alignment region AA, and the third region 323 of the second contact electrode 320 can be a series electrode that electrically connects the light-emitting element ED.

[0128] The third contact electrode 330 may include a first region 331, a second region 332, and a third region 333. The third contact electrode 330 may be configured to extend over the second alignment region AA2, the third alignment region AA3, and the unaligned region NAA located between them.

[0129] The first region 331 of the third contact electrode 330 can be disposed on the second electrode 220 in the second alignment region AA2. In the plan view, the first region 331 of the third contact electrode 330 can extend in the second direction DR2 in the second alignment region AA2.

[0130] The first region 331 of the third contact electrode 330 may be spaced apart from the second region 322 of the second contact electrode 320 in the second alignment region AA2, so as to face the second region 322 of the second contact electrode 320 in the first direction DR1. The first region 331 of the third contact electrode 330 may contact the second end of the second light-emitting element ED in the second alignment region AA2.

[0131] The second region 332 of the third contact electrode 330 may be disposed on the first electrode 210 within the third alignment region AA3. In plan view, the second region 332 of the third contact electrode 330 may extend in the second direction DR2 within the third alignment region AA3. The second region 332 of the third contact electrode 330 may extend below the third alignment region AA3 in plan view (e.g., below in the figures) to be located within (or extend into) a portion of the unaligned region NAA. However, even in this embodiment, the second region 332 of the third contact electrode 330 may terminate at a location spaced below the emission region EMA to be located within the emission region EMA.

[0132] The second region 332 of the third contact electrode 330 may be spaced apart from the first region 331 of the third contact electrode 330. The second region 332 of the third contact electrode 330 may contact the first end of the third light-emitting element ED in the third alignment region AA3.

[0133] The third region 333 of the third contact electrode 330 can be disposed in the unaligned region NAA located between the second alignment region AA2 and the third alignment region AA3. The third region 333 of the third contact electrode 330 in the unaligned region NAA can connect the first region 331 and the second region 332 of the third contact electrode 330 to each other. For example, the third region 333 of the third contact electrode 330 can be a connecting electrode disposed in the unaligned region NAA to connect the second light-emitting element ED disposed in the second alignment region AA2 and the third light-emitting element ED disposed in the third alignment region AA3 in series.

[0134] In the plan view, the third region 333 of the third contact electrode 330 may extend in the unaligned region NAA located between the second alignment region AA2 and the third alignment region AA3 in the first direction DR1. A portion of the third region 333 of the third contact electrode 330 may overlap with the second alignment control pattern 622 in the third direction DR3.

[0135] The first region 331 to the third region 333 of the third contact electrode 330 can be integral (e.g., integrally formed) and can be formed to extend over the second alignment region AA2, the misalignment region NAA, and the third alignment region AA3. Because the third contact electrode 330 contacts the second end of the second light-emitting element ED and the first end of the third light-emitting element ED, the second light-emitting element ED and the third light-emitting element ED can be connected in series with each other through the third contact electrode 330. The first region 331 and the second region 332 of the third contact electrode 330 can be contact electrodes that contact the light-emitting element ED in the alignment region AA, and the third region 333 of the third contact electrode 330 can be a series electrode electrically connected to the light-emitting element ED.

[0136] A fourth contact electrode 340 may be disposed on the second electrode 220 within the third alignment region AA3. In a plan view, the fourth contact electrode 340 may extend in the second direction DR2 within the third alignment region AA3. In a plan view, the fourth contact electrode 340 may extend in the second direction DR2 within the third alignment region AA3, but may terminate at a position spaced apart from the upper side of the third alignment region AA3 (e.g., the upper side in the figure) so as not to extend into the second alignment region AA2. The fourth contact electrode 340 may extend below the third alignment region AA3 in the plan view (e.g., below in the figure) to also be located within a portion of the unaligned region NAA (e.g., partially located within the unaligned region NAA). In the unaligned region NAA, the fourth contact electrode 340 may be located through the second opening OP2 (e.g., see...). Figure 6A The second opening OP2 is electrically connected to the second electrode 220, and the second opening OP2 overlaps with the second contact opening (e.g., the second contact hole) CT2 on the third-direction DR3. This will be described in more detail below.

[0137] The fourth contact electrode 340 can contact the second end of the third light-emitting element ED. For example, the fourth contact electrode 340 can contact the second end of the third light-emitting element ED and the second electrode 220 to electrically connect them.

[0138] In an exemplary embodiment where one of the sub-pixels SPX includes a first electrode 210 and two second electrodes 220, the contact electrodes disposed on the first electrode 210 in the alignment regions AA1 to AA3 (e.g., the second region 322 of the first contact electrode 310, the second region 322 of the second contact electrode 320, and the second region 332 of the third contact electrode 330) may each include one contact electrode. Furthermore, the contact electrodes disposed on the second electrodes 220 in the alignment regions AA1 to AA3 (e.g., the first region 321 of the second contact electrode 320, the first region 331 of the third contact electrode 330, and the fourth contact electrode 340) may each include two separate contact electrodes.

[0139] In the illustrated embodiment, the series connection electrode for connecting the first light-emitting element ED to the third light-emitting element ED, which are respectively disposed in the first alignment region AA1 to the third alignment region AA3, can be disposed in the unaligned region NAA located between the first alignment region AA1 and the third alignment region AA3. The series connection electrode may include the third region 323 of the second contact electrode 320 and the third region 333 of the third contact electrode 330. The third region 323 of the second contact electrode 320 and the third region 333 of the third contact electrode 330 can extend along the first direction DR1 in the unaligned region NAA located between the first alignment region AA1 and the third alignment region AA3. Therefore, when the light-emitting element ED is disposed in the region between the first electrode 210 and the second electrode 220 (which overlaps with the unaligned region NAA between the first alignment region AA1 and the third alignment region AA3 in the third direction DR3), the light-emitting element ED may not emit light because the two ends (or opposite ends) of the light-emitting element ED do not contact different contact electrodes (e.g., contact electrodes with different polarities). Therefore, the alignment control pattern 620 can be disposed in the region between the first electrode 210 and the second electrode 220 (which overlaps with the unaligned region NAA on the third-direction DR3) to prevent the light-emitting element ED from being aligned (or positioned) in the region between the first electrode 210 and the second electrode 220 disposed in the unaligned region NAA. Thus, the number of light-emitting elements ED disposed in the unaligned region NAA can be reduced, and losses can be reduced, thereby improving manufacturing efficiency and reducing the material cost of the light-emitting element ED.

[0140] Figure 4A It is along Figure 3 The sectional view taken by line IV-IV', and Figure 4B It is according to another embodiment along Figure 3 A sectional view taken from line IV-IV'. Figure 4A and Figure 4B Only the settings are shown Figure 3 The sub-pixel SPX shown includes a first aligned region AA1 and an adjacent unaligned region NAA. Figure 5 It is along Figure 3 A sectional view taken by line V-V'. Figure 6A It is along Figure 3 The sectional view taken by line VI-VI', and Figure 6B It is according to another embodiment along Figure 3 A sectional view taken from line VI-VI'.

[0141] Combination Figure 3 Reference Figure 4A , Figure 5 and Figure 6AThe display device 10 may include a substrate SUB, a circuit element layer CCL disposed on the substrate SUB, and a light-emitting layer disposed on the circuit element layer CCL.

[0142] The circuit element layer CCL may include a buffer layer 110, a lower metal layer BML, a semiconductor layer, multiple conductive layers, multiple insulating films, and a via layer 190 disposed on the substrate SUB. The light-emitting layer may be disposed on the via layer 190 of the circuit element layer CCL, and may include electrodes 210 and 220, a first barrier 610, second barriers 410 and 420, a light-emitting element ED, multiple insulating layers 510, 520, and 540, and an alignment control pattern 620.

[0143] The substrate SUB can be an insulating substrate. The substrate SUB can include (or be made of) an insulating material, such as glass, quartz, or polymer resin. Furthermore, the substrate SUB can be a rigid substrate or a flexible substrate that can be bent, folded, and rolled.

[0144] The lower metal layer (BML) can be disposed on the substrate (SUB). The lower metal layer (BML) can be a light-blocking layer that protects the active material layer (ACT) of the semiconductor layer from external light. The lower metal layer (BML) can include a light-blocking material. For example, the lower metal layer (BML) can include an opaque metallic material that blocks light transmission (or can be made of an opaque metallic material).

[0145] The lower metal layer (BML) has a patterned shape. The lower metal layer (BML) can be disposed below the active material layer (ACT) of the transistor TR in the display device 10 to at least cover the channel region of the active material layer (ACT), and can extend to cover the entire active material layer (ACT) of the transistor TR. However, this disclosure is not limited thereto, and the lower metal layer (BML) may be omitted.

[0146] A buffer layer 110 may be disposed on the lower metal layer BML. The buffer layer 110 may cover the entire surface of the substrate SUB on which the lower metal layer BML is disposed (e.g., the buffer layer 110 may cover the lower metal layer BML). The buffer layer 110 may protect the transistor TR from moisture introduced through the substrate SUB, which is susceptible to moisture penetration. The buffer layer 110 may comprise (or may consist of) multiple inorganic layers stacked alternately on top of each other. For example, the buffer layer 110 may have a multilayer structure, including silicon oxide (SiO2). x ), silicon nitride (SiN) x ) and silicon oxynitride (SiO) x N y At least one of the inorganic layers in the formula is stacked alternately on top of each other.

[0147] A semiconductor layer is disposed on the buffer layer 110. The semiconductor layer may include the active material layer ACT of the transistor TR. The active material layer ACT may overlap with the underlying metal layer BML.

[0148] The semiconductor layer may include polycrystalline silicon, oxide semiconductors, etc. In an exemplary embodiment, when the semiconductor layer includes polycrystalline silicon, the semiconductor layer can be formed by crystallizing amorphous silicon. In an embodiment, the semiconductor layer may include oxide semiconductors. Oxide semiconductors may include (or may be) such as 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).

[0149] A gate insulating film 130 may be disposed on the active material layer ACT. The gate insulating film 130 may be disposed on a buffer layer 110 on which the active material layer ACT is disposed. The gate insulating film 130 may function as (or be used as) the gate insulating film of a transistor TR. The gate insulating film 130 may include materials such as silicon oxide (SiO2). x ), silicon nitride (SiN) x ) or silicon oxynitride (SiO) x N y The inorganic layer of the inorganic material, or may have a structure in which one or more of the above materials are stacked on top of each other.

[0150] A gate conductive layer may be disposed on the gate insulating film 130. The gate conductive layer may include the gate electrode GE of the transistor TR. The gate electrode GE may overlap with the channel region of the active material layer ACT in the thickness direction.

[0151] The gate conductive layer may be, but is not limited to, a single layer, or may have a multilayer structure, including any one or more of molybdenum (Mo), aluminum (Al), chromium (Cr), gold (Au), titanium (Ti), nickel (Ni), neodymium (Nd), copper (Cu) and their alloys (or made of the above materials).

[0152] An interlayer insulating film 150 is disposed on the gate conductive layer. The interlayer insulating film 150 may be disposed on a gate insulating film 130 on which the gate conductive layer is formed. The interlayer insulating film 150 may include an inorganic insulating material, such as silicon oxide (SiO2). x ), silicon nitride (SiN) x ) or silicon oxynitride (SiO) x N y ).

[0153] A first data conductive layer 160 is disposed on the interlayer insulating film 150. The first data conductive layer 160 may include a first source / drain electrode SD1 and a second source / drain electrode SD2 of the transistor TR. The first data conductive layer 160 may also include data lines.

[0154] The first source / drain electrode SD1 and the second source / drain electrode SD2 can be electrically connected to the two end regions (e.g., doped regions) of the active material layer ACT through contact openings (e.g., contact holes) passing through the interlayer insulating film 150 and the gate insulating film 130.

[0155] The first data conductive layer 160 may be, but is not limited to, a single layer, or may have a multilayer structure, including any one or more of molybdenum (Mo), aluminum (Al), chromium (Cr), gold (Au), titanium (Ti), nickel (Ni), neodymium (Nd), copper (Cu) and their alloys (or made of the above materials).

[0156] A passivation layer 170 is disposed on the first data conductive layer 160. The passivation layer 170 protects the first data conductive layer 160 by covering it. The passivation layer 170 may include an inorganic insulating material, such as silicon oxide (SiO2). x ), silicon nitride (SiN) x ) or silicon oxynitride (SiO) x N y ).

[0157] The second data conductive layer 180 is disposed on the passivation layer 170. The second data conductive layer 180 may include a first voltage wiring VL1, a second voltage wiring VL2, and a first conductive pattern CDP.

[0158] A high potential voltage (e.g., a first power supply voltage) can be provided to the first voltage wiring VL1, and a low potential voltage (e.g., a second power supply voltage) lower than the high potential voltage (first power supply voltage) of the first voltage wiring VL1 can be provided to the second voltage wiring VL2. The second voltage wiring VL2 can be electrically connected to each second electrode 220 to provide the low potential voltage (second power supply voltage) to the second electrode 220. Furthermore, alignment signals for aligning the light-emitting elements ED can be transmitted to the second voltage wiring VL2 during the manufacturing process of the display device 10.

[0159] The first conductive pattern CDP can be electrically connected to the second source / drain electrode SD2 of the transistor TR through a contact opening (e.g., a contact hole) penetrating the passivation layer 170. The first conductive pattern CDP can be electrically connected to the first electrode 210 through a first contact opening CT1 formed in the misaligned region NAA to transfer the first power supply voltage received from the first voltage wiring VL1 to the first electrode 210.

[0160] The second data conductive layer 180 may be, but is not limited to, a single layer, or may have a multilayer structure, including any one or more of molybdenum (Mo), aluminum (Al), chromium (Cr), gold (Au), titanium (Ti), nickel (Ni), neodymium (Nd), copper (Cu) and their alloys (or made of the above materials).

[0161] A via layer 190 is disposed on the second data conductive layer 180. The via layer 190 may be disposed on a passivation layer 170 on which the second data conductive layer 180 is disposed. The via layer 190 can planarize the surface (e.g., the via layer 190 can provide a flat upper surface). The via layer 190 may include an organic insulating material, such as an organic material like polyimide (PI).

[0162] Combining Figure 3 refer to Figure 4A , Figure 5 and Figure 6A An example of the cross-sectional structure of the light-emitting layer disposed on the through-hole layer 190 is described in more detail.

[0163] Second dikes 410 and 420 may be disposed on via layer 190. Second dikes 410 and 420 may extend in the second direction DR2 in each sub-pixel SPX in the plan view. Second dikes 410 and 420 may terminate at a location spaced apart from the boundary of other adjacent sub-pixels SPX in the second direction DR2, so as not to extend into adjacent sub-pixels SPX in the second direction DR2.

[0164] In an embodiment, the second dikes 410 and 420 included in each sub-pixel SPX may include a first sub-dike 410 and a second sub-dike 420. The first sub-dike 410 and the second sub-dike 420 may be spaced apart from each other in the emission region EMA in a first direction DR1. The space between the spaced-apart first sub-dikes 410 and the second sub-dike 420 may provide an area for mounting the light-emitting element ED. Although each sub-pixel SPX includes one first sub-dike 410 and two second sub-dikes 420 in the figures, the present disclosure is not limited thereto. The number of second dikes 410 and 420 included in each sub-pixel SPX may be increased depending on the shape or arrangement of the first electrode 210 and the second electrode 220.

[0165] The second dikes 410 and 420 can be directly disposed on the via layer 190. At least a portion of each second dike 410 or 420 can protrude from the upper surface of the via layer 190 (e.g., protruding above the upper surface of the via layer 190). The protrusion (or protruding portion) of each second dike 410 or 420 can have an inclined side surface. The second dikes 410 and 420 including inclined side surfaces can change the direction of light emitted from the light-emitting element ED and traveling toward the side surfaces of the second dikes 410 and 420 to an upward direction (e.g., the display direction) (e.g., the direction of the light can be reflected to an upward direction (e.g., the display direction)). For example, each second dike 410 or 420 can serve as a reflective barrier that changes the direction of incident light emitted from the light-emitting element ED to the display direction, while providing space for the light-emitting element ED as described above. Although the side surfaces of the second dikes 410 and 420 are inclined in a linear shape in the figures (e.g., the shape of the inclined side surfaces is linear), this disclosure is not limited thereto. For example, the side surfaces (or outer surfaces) of the second dikes 410 and 420 may have a curved semi-circular or semi-elliptical shape. In an exemplary embodiment, the second dikes 410 and 420 may include an organic insulating material, such as polyimide (PI), but this disclosure is not limited thereto.

[0166] Electrodes 210 and 220 may be disposed on second dikes 410 and 420 and on the via layer 190 exposed by the second dikes 410 and 420. First electrode 210 may be disposed on first sub-dike 410, and second electrode 220 may be disposed on second sub-dike 420. First electrode 210 and second electrode 220 may have a planar shape substantially similar to that of first sub-dike 410 and second sub-dike 420, but may have a larger area (e.g., a larger surface area).

[0167] Reference Figure 3 and Figure 4A The first electrode 210 can contact the first conductive pattern CDP through the first contact opening CT1. In the plan view, the first contact opening CT1 can be located in the unaligned region NAA above the first aligned region AA1 within the emitter region EMA defined by the first dam 610. The first electrode 210 can contact the first conductive pattern CDP through the first contact opening CT1 penetrating the via layer 190. The first electrode 210 can be electrically connected to the transistor TR through the first conductive pattern CDP. The first electrode 210 can be electrically connected to the second source / drain electrode SD2 of the transistor TR through the first conductive pattern CDP.

[0168] Reference Figure 3 and Figure 6AEach second electrode 220 can contact the second voltage wiring VL2 through a second contact opening (e.g., a second contact hole) CT2. In the plan view, the second contact opening CT2 can be located in the misalignment region NAA located below the third alignment region AA3 within the emitter region EMA defined by the first dike 610. A second power supply voltage can be applied to each second electrode 220 through the second voltage wiring VL2.

[0169] Refer again Figure 3 , Figure 4A , Figure 5 and Figure 6A The first electrode 210 may be disposed on the first sub-dike 410 to cover the outer surface of the first sub-dike 410. The first electrode 210 may extend outward from the side surface of the first sub-dike 410 such that a portion of the first electrode 210 is disposed on the upper surface of the via layer 190 exposed by the first sub-dike 410 and the second sub-dike 420 (e.g., exposed between the first sub-dike 410 and the second sub-dike 420).

[0170] The second electrode 220 may be disposed on the second sub-dike 420 to cover the outer surface of the second sub-dike 420. The second electrode 220 may extend outward from the side surface of the second sub-dike 420 such that a portion of each second electrode 220 is disposed on the upper surface of the via layer 190 exposed by the first sub-dike 410 and the second sub-dike 420 (e.g., exposed between the first sub-dike 410 and the second sub-dike 420). The first electrode 210 and the second electrode 220 may be spaced apart from each other in a first direction DR1 to expose at least a portion of the via layer 190 in the region between the first sub-dike 410 and the second sub-dike 420.

[0171] The first electrode 210 and the second electrode 220 can be electrically connected to the light-emitting element ED, and a certain voltage (e.g., a predetermined voltage) can be applied to each of the first electrode 210 and the second electrode 220, causing the light-emitting element ED to emit light. For example, electrodes 210 and 220 can be electrically connected to the light-emitting element ED disposed between the first electrode 210 and the second electrode 220 through the first contact electrode 310 to the fourth contact electrode 340, and the received electrical signal can be transmitted to the light-emitting element ED through the first contact electrode 310 to the fourth contact electrode 340.

[0172] Each of electrodes 210 and 220 may include a transparent conductive material. For example, each of electrodes 210 and 220 may include a material such as indium tin oxide (ITO), indium zinc oxide (IZO), or indium tin zinc oxide (ITZO), but this disclosure is not limited thereto. In some embodiments, each of electrodes 210 and 220 may include a conductive material with high reflectivity (e.g., a highly reflective conductive material). For example, each of electrodes 210 and 220 may include a metal such as silver (Ag), copper (Cu), or aluminum (Al) as a highly reflective material. However, this disclosure is not limited thereto, and each of electrodes 210 and 220 may also have a structure in which a transparent conductive material and a highly reflective metal layer are stacked into one or more layers, or may be formed as a single layer including a transparent conductive material and a metal layer. In an exemplary embodiment, each of electrodes 210 and 220 may have a stacked structure including ITO / Ag / ITO, ITO / Ag / IZO or ITO / Ag / IZO / IZO, or may be an alloy including aluminum (Al), nickel (Ni) and / or lanthanum (La).

[0173] A first insulating layer 510 may be disposed on electrodes 210 and 220. The first insulating layer 510 is disposed on the via layer 190, the first electrode 210 and the second electrode 220, but exposes at least a portion of the upper surface of each of the first electrode 210 and the second electrode 220.

[0174] The first insulating layer 510 can be completely disposed on the first electrode 210 and the second electrode 220 (which is disposed on the first sub-dike 410 and the second sub-dike 420) and in the area between the first electrode 210 and the second electrode 220.

[0175] like Figure 4A As shown, the first insulating layer 510 may have a first opening OP1, which exposes a portion of the upper surface of the first electrode 210 in the region where it overlaps with the first contact opening CT1 along the third direction DR3. The first contact electrode 310 and the first electrode 210 can contact each other through the first opening OP1. Because the first contact electrode 310 and the first electrode 210 are in contact with each other through the first opening OP1, the first electrode 210 can be electrically connected to the first light-emitting element ED disposed in the first alignment region AA1 through the first contact electrode 310.

[0176] like Figure 6AAs shown, the first insulating layer 510 may have a second opening OP2, which partially exposes the upper surface of the second electrode 220 in the region where it overlaps with the second contact opening CT2 along the third direction DR3. The fourth contact electrode 340 and the second electrode 220 can contact each other through the second opening OP2. Because the fourth contact electrode 340 and the second electrode 220 are in contact with each other through the second opening OP2, the second electrode 220 can be electrically connected to the third light-emitting element ED disposed in the third alignment region AA3 through the fourth contact electrode 340.

[0177] The first insulating layer 510 can be inserted between the second contact electrode 320 and the third contact electrode 330 and the first electrode 210 and the second electrode 220. Because the first insulating layer 510 is inserted between the second contact electrode 320 and the third contact electrode 330 and the first electrode 210 and the second electrode 220, the second contact electrode 320 and the third contact electrode 330 do not need to contact the first electrode 210 and the second electrode 220. The second contact electrode 320 and the third contact electrode 330 do not need to be directly connected to the first electrode 210 and the second electrode 220, but can be electrically connected to the first electrode 210 and the second electrode 220 through the light-emitting element ED. This will be referred to below. Figure 9 To describe in more detail.

[0178] The first insulating layer 510 may be stepped, such that a portion of the upper surface of the first insulating layer 510 is recessed between the first electrode 210 and the second electrode 220. A portion of the upper surface of the first insulating layer 510 may be recessed by a step formed by a component disposed below the first insulating layer 510 (e.g., the first electrode 210 and / or the second electrode 220). In some embodiments, an empty space may be formed between each light-emitting element ED and the upper surface of the first insulating layer 510, which is stepped and partially recessed between the first electrode 210 and the second electrode 220. The empty space between the first insulating layer 510 and each light-emitting element ED may be filled with a material forming a second insulating layer 520 (described in more detail). However, this disclosure is not limited thereto, and the first insulating layer 510 may not be stepped between the first electrode 210 and the second electrode 220. For example, the first insulating layer 510 may include a flat upper surface such that the light-emitting element ED is disposed between the first electrode 210 and the second electrode 220.

[0179] The first insulating layer 510 protects the first electrode 210 and the second electrode 220 while insulating them from each other. Furthermore, the first insulating layer 510 prevents the light-emitting element ED disposed on the first insulating layer 510 from directly contacting other components and thus being damaged. Additionally, as described above, the first insulating layer 510 prevents the second contact electrode 320 and the third contact electrode 330 from contacting the first electrode 210 and the second electrode 220, allowing the first light-emitting element ED to the third light-emitting element ED disposed in the first alignment region AA1 to the third alignment region AA3, respectively, to be connected in series with each other through the second contact electrode 320 and the third contact electrode 330.

[0180] The first insulating layer 510 may comprise an inorganic insulating material or an organic insulating material. In an exemplary embodiment, the first insulating layer 510 may comprise an inorganic insulating material, such as silicon oxide (SiO2). x ), silicon nitride (SiN) x ), silicon oxynitride (SiO) x N y ), aluminum oxide (Al2O3) or aluminum nitride (AlN).

[0181] The first dike 610 and the alignment control pattern 620 can be set on the first insulating layer 510.

[0182] The first dike 610 can be disposed at the boundary of each sub-pixel SPX to separate adjacent sub-pixels SPX. Furthermore, according to an embodiment, the first dike 610 can have a greater height than the second dikes 410 and 420.

[0183] The alignment control pattern 620 can be disposed between the first electrode 210 and the second electrode 220 in the unaligned region NAA located between the first alignment region AA1 and the third alignment region AA3. The alignment control pattern 620 can also be disposed between the first sub-dike 410 and the second sub-dike 420 in the unaligned region NAA. This arrangement prevents (or substantially prevents) the light-emitting element ED from being aligned (or positioned) between the first sub-dike 410 and the second sub-dike 420 in the unaligned region NAA. In the unaligned region NAA, the third region 323 of the second contact electrode 320 and the third region 333 of the third contact electrode 330 can be disposed on the first sub-dike 410 and the second sub-dike 420. Therefore, even if the light-emitting element ED is disposed in the unaligned region NAA, the light-emitting element ED may not emit light. Therefore, since the alignment control pattern 620 is set in the misalignment area NAA between the first sub-dike 410 and the second sub-dike 420, the number of light-emitting elements ED that may be lost between the first sub-dike 410 and the second sub-dike 420 can be reduced.

[0184] The light-emitting element ED can be disposed in the first alignment region AA1 to the third alignment region AA3. The light-emitting element ED can be disposed on the first insulating layer 510 between the first electrode 210 and the second electrode 220.

[0185] The second insulating layer 520 may be partially disposed on the light-emitting element ED, which is located between the first electrode 210 and the second electrode 220 in the first alignment region AA1 to the third alignment region AA3. The second insulating layer 520 may partially cover the outer surface of the light-emitting element ED. The second insulating layer 520 may be disposed on the light-emitting element ED, but may expose the first end and the second end (e.g., opposite ends) of the light-emitting element ED. In a plan view, a portion of the second insulating layer 520 disposed on the light-emitting element ED may extend in the second direction DR2 between the first electrode 210 and the second electrode 220.

[0186] The second insulating layer 520 may not be disposed in the non-alignment region NAA. The second insulating layer 520 may be spaced apart from the alignment control pattern 620. For example, the second insulating layer 520 may form a linear pattern or an island pattern in each alignment region AA1, AA2, or AA3. Although not shown in the figures, as described above, the material forming the second insulating layer 520 may be disposed between the first electrode 210 and the second electrode 220, and may fill the empty space between the recessed first insulating layer 510 and each light-emitting element ED.

[0187] Contact electrodes 310 to 340 can be disposed on the second insulating layer 520. As described above, the first contact electrode 310 can be electrically connected to the first electrode 210 by contacting the upper surface of the first electrode 210 through the first opening OP1. Therefore, the first contact electrode 310 can contact the first end of the first light-emitting element ED and the first electrode 210, thereby electrically connecting the first end of the first light-emitting element ED and the first electrode 210. Because the second contact electrode 320 is disposed throughout the first alignment region AA1 and the second alignment region AA2, and the third contact electrode 330 is disposed throughout the second alignment region AA2 and the third alignment region AA3, the first light-emitting element ED to the third light-emitting element ED can be connected in series with each other through the second contact electrode 320 and the third contact electrode 330. As described above, the fourth contact electrode 340 can be electrically connected to the second electrode 220 by contacting the upper surface of the second electrode 220 through the second opening OP2. Therefore, the fourth contact electrode 340 can contact the second end of the third light-emitting element ED and the second electrode 220, thereby electrically connecting the second end of the third light-emitting element ED and the second electrode 220.

[0188] The second insulating layer 520 may include an inorganic insulating material or an organic insulating material. In an exemplary embodiment, the second insulating layer 520 may include an inorganic insulating material. When the second insulating layer 520 includes an inorganic insulating material, it may include silicon oxide (SiO2). x ), silicon nitride (SiN) x ), silicon oxynitride (SiO) x N y The second insulating layer 520 may contain aluminum oxide (Al2O3) or aluminum nitride (AlN). In some embodiments, the second insulating layer 520 may include an organic insulating material. When the second insulating layer 520 includes an organic insulating material, it may include acrylic resin, epoxy resin, phenolic resin, polyamide resin, polyimide resin, unsaturated polyester resin, polyphenylene ether resin, polyphenylene sulfide resin, benzocyclobutene, cardo resin, siloxane resin, silsesquioxane resin, polymethyl methacrylate, polycarbonate, or polymethyl methacrylate-polycarbonate synthetic resin. However, this disclosure is not limited thereto.

[0189] Reference Figure 3 and Figure 5 The third region 323 of the second contact electrode 320 and the third region 333 of the third contact electrode 330 can be disposed on the alignment control pattern 620 disposed in the non-alignment region NAA. The third region 323 of the second contact electrode 320 and the third region 333 of the third contact electrode 330 can be completely disposed on the alignment control pattern 620 and the first insulating layer 510 exposed by the alignment control pattern 620 in the non-alignment region NAA located between alignment regions AA1 to AA3. In the illustrated embodiment, the third region 323 of the second contact electrode 320 and the third region 333 of the third contact electrode 330 can be configured to completely (or entirely) cover the side and top surfaces of the alignment control pattern 620. For example, the alignment control pattern 620 can at least partially overlap with the region where a series connection electrode connecting the light-emitting element ED disposed in the consecutive first alignment regions AA1 to third alignment regions AA3 is disposed.

[0190] Contact electrodes 310 to 340 may include conductive materials such as ITO, IZO, ITZO, or aluminum (Al). For example, contact electrodes 310 to 340 may include transparent conductive materials, but this disclosure is not limited thereto.

[0191] The third insulating layer 540 may be disposed on the entire substrate SUB. The third insulating layer 540 can protect the components disposed on the substrate SUB from the influence of the external environment. The third insulating layer 540 may include inorganic insulating materials or organic insulating materials. For example, the third insulating layer 540 may include the materials listed above that may be included in the second insulating layer 520 as materials.

[0192] Now refer to Figure 4B and Figure 6B Description of along according to another embodiment Figure 3 The cross-sectional structure of the display device 10 is shown by lines IV-IV' and VI-VI'. Figure 4B and Figure 6B In the description, redundant descriptions of elements that are the same as those described above may be omitted or only briefly given, and the main focus will be on describing the differences between them.

[0193] Reference Figure 4B and Figure 6B The implementation methods shown are the same as Figure 4A and Figure 6A The difference in the embodiment shown is that the first opening OP1_1 and the second opening OP2_1 are formed in the first insulating layer 510 on the first sub-dike 410 and the second sub-dike 420, and do not overlap with the first contact opening CT1 and the second contact opening CT2 on the third-direction DR3.

[0194] The first opening OP1_1 can be disposed in the first alignment region AA1 to expose the first electrode 210 disposed on the upper surface of the first sub-dike 410. Therefore, the first contact electrode 310_1 can contact the first electrode 210 through the first opening OP1_1 in the first alignment region AA1. The first opening OP1_1 can be disposed on the third-direction DR3 without overlapping with the first contact opening CT1 disposed in the non-alignment region NAA.

[0195] Similarly, a second opening OP2_1 can be disposed in the third alignment region AA3 to expose the second electrode 220 disposed on the upper surface of the second sub-dike 420. Therefore, the fourth contact electrode 340_1 can contact the second electrode 220 through the second opening OP2_1 in the third alignment region AA3. The second opening OP2_1 can be disposed on the third-direction DR3 without overlapping with the second contact opening CT2 disposed in the non-alignment region NAA.

[0196] Figure 7 This is a schematic diagram of a light-emitting element (ED) according to an embodiment.

[0197] The light-emitting element (ED) can be a light-emitting diode (LED). For example, the ED can be an inorganic LED having a micrometer or nanometer size and comprising (or being made of) inorganic materials. Inorganic LEDs can be aligned by forming an electric field between multiple electrodes facing each other. For example, an inorganic LED can be aligned between two adjacent electrodes by forming an electric field in a certain direction (e.g., in a specific direction) to have polarity between the electrodes.

[0198] The light-emitting element (ED) according to this embodiment can extend in one direction (e.g., it can extend primarily in one direction). The ED can have a rod shape, a wiring shape, a tube shape, etc. In an exemplary embodiment, the ED can have a cylindrical shape or a rod shape. However, the shape of the ED is not limited to these, and the ED can also have various shapes including polygonal prisms (such as cubic prisms, rectangular parallelepiped prisms, hexagonal prisms) and shapes that extend in one direction and have a partially inclined outer surface. Multiple semiconductors included in the ED can be sequentially arranged or stacked along one direction in which the ED extends.

[0199] A light-emitting element (ED) may comprise a semiconductor layer doped with impurities of any conductivity type (e.g., p-type or n-type). The semiconductor layer can receive electrical signals from an external power source and emit light of a specific wavelength band (e.g., a particular wavelength band).

[0200] Reference Figure 7 The light-emitting element ED may include a first semiconductor layer 31, a second semiconductor layer 32, an active layer 36, an element electrode layer 37, and an element insulating film 38.

[0201] The first semiconductor layer 31 can be an n-type semiconductor. For example, when the light-emitting element ED emits light in the blue wavelength band, the first semiconductor layer 31 can 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). The semiconductor material included in the first semiconductor layer 31 can be any one or more of, for example, n-type doped AlGaInN, GaN, AlGaN, InGaN, AlN, and InN. The first semiconductor layer 31 can be doped with an n-type dopant, and the n-type dopant can be, for example, Si, Ge, or Sn. In an exemplary embodiment, the first semiconductor layer 31 can be n-GaN doped with n-type Si.

[0202] The second semiconductor layer 32 may be spaced apart from the first semiconductor layer 31 in one direction in which the light-emitting element ED extends. The second semiconductor layer 32 may be a p-type semiconductor. For example, when the light-emitting element ED emits light in the blue or green wavelength band, the second semiconductor layer 32 may include a semiconductor with the chemical formula Al. x Ga y In 1-x-yThe semiconductor material is N (0≤x≤1, 0≤y≤1, 0≤x+y≤1). The semiconductor material included in the second semiconductor layer 32 can be any one or more of p-type doped AlGaInN, GaN, AlGaN, InGaN, AlN, and InN. The second semiconductor layer 32 can be doped with a p-type dopant, and the p-type dopant can be, for example, Mg, Zn, Ca, Se, or Ba. In an exemplary embodiment, the second semiconductor layer 32 can be p-GaN doped with p-type Mg. The length of the second semiconductor layer 32 in one direction can be in the range of about 0.05 μm to about 0.10 μm, but is not limited thereto.

[0203] Although each of the first semiconductor layer 31 and the second semiconductor layer 32 is shown as consisting of a single layer, this disclosure is not limited thereto. According to other embodiments, each of the first semiconductor layer 31 and the second semiconductor layer 32 may include more layers; for example, depending on the material of the active layer 36, each of the first semiconductor layer 31 and the second semiconductor layer 32 may also include a cladding layer or a tensile strain barrier reduction (TSBR) layer.

[0204] An active layer 36 is disposed between a first semiconductor layer 31 and a second semiconductor layer 32. The active layer 36 may comprise a material having a single-multiple quantum well structure or a multiple quantum well structure. When the active layer 36 comprises a material having a multiple quantum well structure, it may have a structure in which multiple quantum layers and multiple well layers are alternately stacked. Based on electrical signals received through the first semiconductor layer 31 and the second semiconductor layer 32, the active layer 36 may emit light through the recombination of electron-hole pairs. For example, when the active layer 36 emits light in the blue wavelength band, it may comprise a material such as AlGaN or AlGaInN. When the active layer 36 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 36 may comprise AlGaInN as a quantum layer and AlInN as a well layer to emit blue light in the range of about 450 nm to about 495 nm in the center wavelength band as described above.

[0205] However, this disclosure is not limited thereto, and the active layer 36 may also have a structure in which semiconductor materials with large bandgap energy and semiconductor materials with small bandgap energy are stacked alternately, or may include different group 3 to group 5 semiconductor materials depending on the wavelength band of the light emitted. The light emitted from the active layer 36 is not limited to the blue wavelength band. In some embodiments, the active layer 36 may emit light in the red or green wavelength band. The length of the active layer 36 in one direction may be in the range of about 0.05 μm to about 0.10 μm, but is not limited thereto.

[0206] The light emitted from the active layer 36 can radiate not only to the outer surfaces of both ends of the light-emitting element ED in the longitudinal direction, but also to the side surfaces. In other words, the direction of the light emitted from the active layer 36 is not limited to one direction.

[0207] The element electrode layer 37 may be disposed on the second semiconductor layer 32. The element electrode layer 37 may be an ohmic contact electrode. However, this disclosure is not limited thereto, and the element electrode layer 37 may also be a Schottky contact electrode. A light-emitting element (ED) may include at least one element electrode layer 37. Although Figure 7 The light-emitting element ED shown includes one element electrode layer 37, but this disclosure is not limited thereto. In some embodiments, the light-emitting element ED may include more element electrode layers 37.

[0208] According to an embodiment, when the light-emitting element ED is electrically connected to an electrode or contact electrode in the display device 10, the element electrode layer 37 can reduce the resistance between the light-emitting element ED and the electrode or contact electrode. The element electrode layer 37 may include a conductive metal. For example, the element electrode layer 37 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 element electrode layer 37 may include an n-type or p-type doped semiconductor material. The element electrode layer 37 may include the same material or different materials, but this disclosure is not limited thereto.

[0209] In an embodiment, the element electrode layer 37 may include a transparent conductive material, allowing light emitted from the active layer 36 to be smoothly emitted to both ends of the light-emitting element ED. For example, the element electrode layer 37 may include ITO. The thickness of the element electrode layer 37 in one direction may be in the range of about 0.09 μm to about 0.14 μm, but is not limited thereto. One direction may be the direction in which the light-emitting element ED extends.

[0210] The element insulating film 38 surrounds the side surfaces of semiconductor layers 31 and 32 and element electrode layer 37. In an exemplary embodiment, the element insulating film 38 may at least surround the side surface of the active layer 36 and extend in one direction in which the light-emitting element ED extends. The element insulating film 38 may protect the first semiconductor layer 31, the second semiconductor layer 32, the active layer 36, and the element electrode layer 37. For example, the element insulating film 38 may surround the side surfaces of the first semiconductor layer 31, the second semiconductor layer 32, the active layer 36, and the element electrode layer 37, but may expose both ends (e.g., opposite ends) of the light-emitting element ED in the longitudinal direction.

[0211] In the accompanying drawings, the element insulating film 38 extends in the longitudinal direction of the light-emitting element ED to completely cover the side surface of the first semiconductor layer 31 to the side surface of the element electrode layer 37. However, this disclosure is not limited thereto, and the element insulating film 38 may only cover some of the semiconductor layers and the side surfaces of the active layer 36, or it may only partially cover the side surfaces of the element electrode layer 37 to partially expose the side surfaces of the element electrode layer 37. Furthermore, in the cross-sectional view, the upper surface of the element insulating film 38 may be annular in the region adjacent to at least one end of the light-emitting element ED.

[0212] The thickness of the component insulating film 38 can be (but is not limited to) in the range of about 10 nm to about 1.0 μm. In one embodiment, the thickness of the component insulating film 38 can be about 40 nm.

[0213] The component insulating film 38 may include a material with insulating properties, such as silicon oxide (SiO2). x ), silicon nitride (SiN) x ), silicon oxynitride (SiO) x N y The active layer 36 can be aluminum nitride (AlN) or aluminum oxide (Al2O3). Therefore, the element insulating film 38 can prevent (or substantially prevent) electrical short circuits that may occur when the active layer 36 directly contacts the electrodes transmitting electrical signals to the light-emitting element ED. Furthermore, because the element insulating film 38 protects the outer surface of the light-emitting element ED, including the active layer 36, the luminous efficiency may not be reduced (or may not be significantly reduced).

[0214] In some embodiments, the outer surface of the element insulating film 38 may be treated. The light-emitting elements ED dispersed in the ink may be sprayed onto the electrodes and then aligned. The surface of the element insulating film 38 may be hydrophobically or hydrophilically treated so that the light-emitting elements ED remain separated in the ink and do not aggregate with other adjacent light-emitting elements ED (e.g., so that the light-emitting elements ED do not coalesce in the ink).

[0215] The length l of the light-emitting element ED can range from about 1 μm to about 10 μm or from about 2 μm to about 6 μm, and in some embodiments, it can range from about 3 μm to about 5 μm. Furthermore, the diameter of the light-emitting element ED can range from about 30 nm to about 700 nm, and the aspect ratio of the light-emitting element ED can be from about 1.2 to about 100. However, this disclosure is not limited thereto, and the plurality of light-emitting elements ED included in the display device 10 can have different diameters depending on the composition of the active layer 36. In one embodiment, the diameter of the light-emitting element ED can be about 500 nm.

[0216] Figure 8 yes Figure 4A An enlarged sectional view of region A.

[0217] Reference Figure 8 The two ends of the first light-emitting element ED can contact at least one of the contact electrodes 310 to 340. The plurality of layers comprising the first light-emitting element ED disposed in the first alignment region AA1 and the first contact electrode 310 and the second contact electrode 320 contacting the two ends of the first light-emitting element ED will now be described in more detail.

[0218] The first contact electrode 310 can contact the first end of the first light-emitting element ED disposed in the first alignment region AA1. In an exemplary embodiment, the element electrode layer 37 can be located at the first end of the first light-emitting element ED, and the first semiconductor layer 31 can be disposed at the second end of the first light-emitting element ED. The element insulating film 38 can be disposed on the outer surface of the first light-emitting element ED. The element electrode layer 37 located at the first end of the first light-emitting element ED and the first semiconductor layer 31 located at the second end of the first light-emitting element ED can be exposed on the surface without being covered by the element insulating film 38. Therefore, the first contact electrode 310 can contact the element electrode layer 37 of the first light-emitting element ED, and the second contact electrode 320 (e.g., the first region 321 of the second contact electrode 320) can contact the first semiconductor layer 31 of the first light-emitting element ED.

[0219] The first contact electrode 310 and the second contact electrode 320 (e.g., the first region 321 of the second contact electrode 320) disposed on the first insulating layer 510 may be spaced apart from each other on the first insulating layer 510.

[0220] Figure 9 It is along Figure 3 The following cross-sectional views are taken along lines IXa-IXa', IXb-IXb', and IXc-IXc'. For ease of description, the detailed structure of the circuit element layer CCL is omitted in the following cross-sectional views of the display device 10.

[0221] Now we will combine Figure 3 refer to Figure 9 The series connection of the first light-emitting element ED1 to the third light-emitting element ED3, respectively disposed in the first alignment region AA1 to the third alignment region AA3, is described in more detail. For ease of description, in Figure 9 In the figure, the first light-emitting element ED1 to the third light-emitting element ED3, which are respectively disposed in the first alignment region AA1 to the third alignment region AA3, are respectively represented by the reference numerals ED1 to ED3.

[0222] The first contact electrode 310 can contact the first end of the first light-emitting element ED1 in the first alignment region AA1. The first contact electrode 310 can be connected through the first opening OP1 (see...). Figure 4AThe first contact electrode 310 can contact the first electrode 210 and the first end of the first light-emitting element ED1.

[0223] The second contact electrode 320 can contact the second end of the first light-emitting element ED1 and the first end of the second light-emitting element ED2 in the first alignment region AA1 and the second alignment region AA2, respectively. For example, in the first alignment region AA1, the first region 321 of the second contact electrode 320 can contact the second end of the first light-emitting element ED1. In the second alignment region AA2, the second region 322 of the second contact electrode 320 can contact the first end of the second light-emitting element ED2. The first region 321 and the second region 322 of the second contact electrode 320 can be electrically connected to each other through a third region 323 of the second contact electrode 320 disposed in the unaligned region NAA located between the first alignment region AA1 and the second alignment region AA2.

[0224] The third contact electrode 330 can contact the second end of the second light-emitting element ED2 and the first end of the third light-emitting element ED3 in the second alignment region AA2 and the third alignment region AA3, respectively. For example, in the second alignment region AA2, the first region 331 of the third contact electrode 330 can contact the second end of the second light-emitting element ED2. In the third alignment region AA3, the second region 332 of the third contact electrode 330 can contact the first end of the third light-emitting element ED3. The first region 331 and the second region 332 of the third contact electrode 330 can be electrically connected to each other through the third region 333 of the third contact electrode 330 located in the unaligned region NAA between the second alignment region AA2 and the third alignment region AA3.

[0225] In the third alignment region AA3, the fourth contact electrode 340 can contact the second end of the third light-emitting element ED3. The fourth contact electrode 340 can be connected through the second opening OP2 (see...). Figure 6A The fourth contact electrode 340 may contact the second electrode 220 and the second end of the third light-emitting element ED3.

[0226] The first power supply voltage applied from the first voltage wiring VL1 can be transmitted to the first terminal of the first light-emitting element ED1 through the first contact electrode 310, and the second electrode 220, to which the second power supply voltage is applied through the second voltage wiring VL2, can transmit the second power supply voltage to the second terminal of the third light-emitting element ED3 through the fourth contact electrode 340. Therefore, the electrical signal transmitted from the first contact electrode 310 to the first light-emitting element ED1 can be transmitted along the first light-emitting element ED1, the second contact electrode 320, the second light-emitting element ED2, the third contact electrode 330, the third light-emitting element ED3, and the fourth contact electrode 340 through the difference between the first power supply voltage and the second power supply voltage.

[0227] According to the implementation, the light-emitting elements ED (ED1 to ED3) disposed in the alignment area AA of each sub-pixel SPX can be connected in series with each other through contact electrodes 310 to 340.

[0228] When any one of the multiple light-emitting elements ED located in the same alignment region AA short-circuits due to a defect, current flows through the defective light-emitting element ED in the alignment region AA, including the defective one. Therefore, normal (e.g., operable) light-emitting elements ED may not emit light because no electrical signal is transmitted to them. For example, when any one of the first light-emitting elements ED1 located in the first alignment region AA1 short-circuits, the other normal first light-emitting elements ED1 located in the first alignment region AA1 may not emit light because no current flows through them. However, even in this case, an electrical signal can still be transmitted to the second light-emitting elements ED2 and the third light-emitting elements ED3 located in the second alignment region AA2 and the third alignment region AA3 and connected in series with each other. Therefore, the second light-emitting elements ED2 and the third light-emitting elements ED3 located in the second alignment region AA2 and the third alignment region AA3 can emit light.

[0229] For example, when the light-emitting elements ED disposed in multiple alignment regions AA (AA1 to AA3) of a sub-pixel SPX are connected in series with each other, even if a defective light-emitting element ED is disposed in any one of the alignment regions AA, light can still be emitted by the light-emitting elements ED disposed in the other alignment regions AA. Furthermore, since the first light-emitting elements ED1 to the third light-emitting elements ED3 disposed in the first alignment region AA1 to the third alignment region AA3 are connected in series with each other, the luminous efficiency can be further improved.

[0230] Figure 10 It is along Figure 3 A sectional view taken by line X-X'.

[0231] Now refer to Figure 10The relationship between the height (or thickness) and width of the first dike 610, the second dikes 410 and 420, and the second insulating layer 520 is described in more detail. Figure 10 In this document, the circuit element layer CCL disposed on the substrate SUB is shown and described as the circuit element layer CCL, and some of the aforementioned layers are omitted for ease of description. The relative heights of the first dam 610, the second dams 410 and 420, and the second insulating layer 520 can be compared based on the distance measured in a third direction DR3 from a flat reference surface that does not have the underlying stepped structure (e.g., the upper surface of the via layer 190 of the circuit element layer CCL or the upper surface of the substrate SUB).

[0232] The height h2 of the first dike 610 can be greater than the height h1 of each of the second dikes 410 or 420. The height h2 of the first dike 610 can be greater than the height h4 of the second insulating layer 520. The height h2 of the first dike 610 can be greater than or equal to the height h3 of each alignment control pattern 620. Because the height h2 of the first dike 610 is greater than the height of the other components, it can prevent (or substantially prevent) ink I (see, for example, see...) Figure 13 During the inkjet process, overflow occurs from one sub-pixel SPX to the adjacent sub-pixel SPX, which will be described in more detail below.

[0233] Because the height h2 of the first dike 610 and the height h3 of each alignment control pattern 620 are greater than the height h1 of each second dike 410 or 420, it is possible to effectively prevent the light-emitting element ED from being positioned between the second dikes 410 and 420 in the misalignment area NAA.

[0234] Without being limited to the examples below, the height h1 of each second dike 410 or 420 may be in the range of about 1.8 μm to about 2 μm, and the height h2 of the first dike 610 may be greater than the height h1 of each second dike 410 or 420 and in the range of about 2 μm to about 3 μm. In an exemplary embodiment where the second insulating layer 520 comprises an inorganic insulating material, the thickness d of the second insulating layer 520 may be in the range of about 0.3 μm to about 0.5 μm, and the height h4 of the second insulating layer 520 may be equal to or greater than the sum of the thickness d of the second insulating layer 520 and the diameter of each light-emitting element ED, or may be equal to or less than the height h1 of each second dike 410 or 420.

[0235] The width W1 of the second insulating layer 520 in the first direction DR1 can be less than the length l of each light-emitting element ED. Because the width W1 of the second insulating layer 520 in the first direction DR1 is less than the length l of each light-emitting element ED, both ends of each light-emitting element ED can be exposed by the second insulating layer 520.

[0236] The width W2 of each alignment control pattern 620 in the first direction DR1 can be smaller than the gap W3 between the adjacent first sub-dikes 410 and second sub-dikes 420 in the first direction DR1. The width W2 of each alignment control pattern 620 in the first direction DR1 can be greater than the length l of each light-emitting element ED. Therefore, the width W2 of each alignment control pattern 620 in the first direction DR1 can be greater than the width W1 of the second insulating layer 520 disposed on the light-emitting element ED.

[0237] Because the width W2 of each alignment control pattern 620 in the first direction DR1 is smaller than the gap W3 between the first sub-dike 410 and the second sub-dike 420 in the first direction DR1, each alignment control pattern 620 may not overlap with the first sub-dike 410 and the second sub-dike 420 in the third direction DR3. However, even in such an embodiment, each alignment control pattern 620 may be disposed between the first sub-dike 410 and the second sub-dike 420 to overlap with the first insulating layer 510 exposed by the first sub-dike 410 and the second sub-dike 420 in the third direction DR3, thereby preventing (or substantially preventing) the light-emitting element ED from being aligned (or disposed) between the second dikes 410 and 420.

[0238] Now refer to Figures 11 to 17 The process of manufacturing the display device 10 according to the embodiment is described.

[0239] Figures 11 to 13 This is a cross-sectional view illustrating some steps of the manufacturing process of a display device according to an embodiment. Figure 14 yes Figure 13 The diagram shows the planar layout of the sub-pixel SPX in the manufacturing process. Figures 15 to 17 This is a cross-sectional view illustrating some steps of the manufacturing process of a display device according to an embodiment.

[0240] First, refer to Figure 11 Prepare a substrate SUB and form multiple electrodes 210 and 220 on the substrate SUB.

[0241] Electrodes 210 and 220 may include a first electrode 210 and a second electrode 220 spaced apart from each other and facing each other. A plurality of second dikes 410 and 420 may also be provided on the substrate SUB, the plurality of second dikes 410 and 420 being disposed between the first electrode 210 and the second electrode 220 and the substrate SUB. The second dikes 410 and 420 may include a first sub-dike 410 disposed between the first electrode 210 and the substrate SUB and a second sub-dike 420 disposed between the second electrode 220 and the substrate SUB.

[0242] As described above, the circuit element layer CCL disposed on the substrate SUB may include multiple conductive layers and multiple insulating layers. For ease of description, the circuit element layer CCL is schematically shown and described as a circuit element layer CCL, without showing its individual layers.

[0243] Next, a first insulating layer 510 can be formed on electrodes 210 and 220. The first insulating layer 510 can be formed over the entire substrate SUB to cover all of electrodes 210 and 220, and can then be partially removed prior to the process of forming the plurality of contact electrodes 310 to 340. For example, the first insulating layer 510 can be patterned in a subsequent process to form a first opening OP1 and a second opening OP2 exposing the upper surfaces of electrodes 210 and 220 in a region overlapping with a first contact opening CT1 and a second contact opening CT2 disposed in the misaligned region NAA along the third direction DR3. Thus, the first insulating layer 510 can partially expose the upper surfaces of the first electrode 210 and the second electrode 220. The patterning of the first insulating layer 510 can produce... Figures 4A to 6B The structure of each component is the same as that of the components described above, and therefore, the order in which each component is formed will not be described again.

[0244] Next, refer to Figure 12 A first dam 610 and an alignment control pattern 620 spaced apart from the first dam 610 are formed on the first insulating layer 510. The first dam 610 and the alignment control pattern 620 may be disposed on the first insulating layer 510 in an alignment non-alignment region (NAA). The first dam 610 and the alignment control pattern 620 may be formed by the same masking process. The first dam 610 and the alignment control pattern 620 may comprise the same material. For example, the first dam 610 and the alignment control pattern 620 may include, but are not limited to, polyimide (PI).

[0245] For example, the first embankment 610 and the alignment control pattern 620 can be formed by coating an organic material layer on a substrate SUB and then exposing and developing the organic material layer to form an opening that exposes the area outside the boundary region of the sub-pixel SPX and the area between the first electrode 210 and the second electrode 220 in the unaligned region NAA located between the alignment regions AA1 to AA3.

[0246] Next, refer to Figure 13 and Figure 14The ink I, in which light-emitting elements ED are dispersed, is sprayed onto the ink impact region IA on the substrate SUB. The ink I may include a solvent SV and a plurality of light-emitting elements ED included in the solvent SV. For example, the ink I, including the solvent SV and the light-emitting elements ED dispersed in the solvent SV, can be sprayed onto the ink impact region IA on the substrate SUB using, for example, an inkjet printing device.

[0247] The ink impact area IA can be a region within the area surrounded by the first dike 610 that excludes the area where the alignment control pattern 620 is provided (e.g., other than the area where the alignment control pattern 620 is provided). The ink impact area IA can include a first alignment area AA1, a second alignment area AA2, a third alignment area AA3, and a region connecting them (or between them) in the second direction DR2. The region connecting the first alignment area AA1 to the third alignment area AA3 can include the area between the first dike 610 and each alignment control pattern 620, as well as the area between the alignment control patterns 620.

[0248] In the printing process, ink I, which is sprayed onto the substrate SUB by means of, for example, inkjet printing equipment, can be uniformly distributed in the ink impact region IA. Even if ink I sprayed onto the ink impact region IA impacts any of the first alignment regions AA1 to the third alignment regions AA3, it can move to other alignment regions due to the fluidity of the solvent SV included in ink I.

[0249] According to an embodiment, a first dam 610 and an alignment control pattern 620 disposed in each sub-pixel SPX can guide ink I, in which light-emitting elements ED are dispersed, to move or migrate into the first alignment region AA1 to the third alignment region AA3. The solvent SV of ink I can be hydrophilic, and the first dam 610 and / or the alignment control pattern 620 can include a hydrophobic material. Because the hydrophilic solvent SV is sprayed onto the first dam 610 and the alignment control pattern 620, which include a hydrophobic material, ink I can move or migrate into the ink impact region IA defined by the first dam 610 and the alignment control pattern 620.

[0250] In the illustrated embodiment, even if ink I is not sprayed onto each of the first alignment regions AA1 to the third alignment regions AA3, the impact of ink I can be easily controlled because the ink impact region IA is formed by the first dam 610 and the patterned alignment control pattern 620 such that the first alignment regions AA1 to the third alignment regions AA3 are connected. For example, even if ink I is sprayed (or impacted) onto any area of ​​the ink impact region IA, ink I can move within the ink impact region IA and move to the first alignment regions AA1 to the third alignment regions AA3. Therefore, the impact position of ink I on the substrate SUB can be easily controlled, thereby improving the manufacturing process efficiency of the inkjet process during the manufacturing process of the display device 10.

[0251] Furthermore, because the first dike 610 is formed to have a height h2 that is greater than the height h1 of each of the second dikes 410 or 420, the first dike 610 can prevent (or substantially prevent) ink I from overflowing into the adjacent sub-pixel SPX.

[0252] Next, refer to Figure 15 Alignment signals are transmitted to electrodes 210 and 220 to align the light-emitting element ED on electrodes 210 and 220. For example, the light-emitting element ED is aligned between the first electrode 210 and the second electrode 220 disposed in the first alignment region AA1 to the third alignment region AA3.

[0253] When an alignment signal is transmitted to electrodes 210 and 220, an electric field E can be generated in the ink I sprayed onto the first and second electrodes 210 and 220 in the region between the first and second electrodes 210 and 220. When the electric field E is generated between the first and second electrodes 210 and 220 in the region between the first and second electrodes 210 and 220, the light-emitting elements ED dispersed in the ink I can be subjected to dielectric force due to the electric field E. The light-emitting elements ED subjected to dielectric force can be positioned (or aligned) between the first and second electrodes 210 and 220, while their orientation and position change from their deposition orientation.

[0254] In the illustrated embodiment, when the light-emitting elements ED are aligned (or positioned) between the first electrode 210 and the second electrode 220 by the dielectric force due to the electric field E, they can be positioned between the first electrode 210 and the second electrode 220 in the first alignment region AA1 to the third alignment region AA3, but may not be positioned in the non-alignment region NAA. For example, the alignment control pattern 620 can be positioned between the first electrode 210 and the second electrode 220 in the non-alignment region NAA, and the light-emitting elements ED can be positioned between the first electrode 210 and the second electrode 220 in the first alignment region AA1 to the third alignment region AA3, but the alignment control pattern 620 may not be positioned in the non-alignment region NAA.

[0255] Because the alignment control pattern 620 is disposed between the first electrode 210 and the second electrode 220 in the misalignment region NAA, the light-emitting element ED is not aligned (or positioned) in the misalignment region NAA. Therefore, the number of lost light-emitting elements ED (e.g., the number of light-emitting elements ED not connected to the first electrode 210 and the second electrode 220) can be reduced. As described above, only the series-connected electrodes (e.g., the third region 323 of the second contact electrode 320 and the third region 333 of the third contact electrode 330) can be disposed in the misalignment region NAA located between the alignment regions AA1 to AA3. Therefore, even if the light-emitting element ED is disposed in the misalignment region NAA, the light-emitting element ED may not emit light. Therefore, the alignment control pattern 620 can be disposed between the alignment regions AA1 to AA3 to prevent (or substantially prevent) the light-emitting element ED from being aligned (or positioned) in the misalignment region NAA. This can reduce or minimize the number of light-emitting elements ED lost due to lack of electrical connection.

[0256] After the light-emitting element ED is aligned between electrodes 210 and 220, a process can be performed to cut (or separate) each electrode 210 or 220 in the cutting region CBA located between adjacent sub-pixels SPX on the second direction DR2. This process of cutting each electrode 210 or 220, as... Figure 14 The electrodes 210 or 220 shown extending to adjacent sub-pixels SPX can be as follows: Figure 3 Separate as shown in the diagram.

[0257] Next, refer to Figure 16 After removing (or evaporating) the solvent SV of ink I, a second insulating layer 520 is formed. The process of removing the solvent SV can be performed by conventional heat treatment or photo-irradiation processes. The heat treatment or photo-irradiation process can be performed within the range of removing the solvent SV (e.g., solvent SV only) without damaging the light-emitting element ED.

[0258] The second insulating layer 520 can fix the light-emitting element ED aligned between the first electrode 210 and the second electrode 220. That is, when the second insulating layer 520 is formed, the initial position of the light-emitting element ED does not need to be changed in subsequent processes. The second insulating layer 520 may not be formed in the misalignment region NAA located between the alignment regions AA1 to AA3. The second insulating layer 520 may not be provided on the alignment control pattern 620.

[0259] Next, refer to Figure 17 A plurality of contact electrodes 310 to 340 are formed on the second insulating layer 520. The contact electrodes 310 to 340 can be formed using the same (or substantially the same) process. In some embodiments, prior to the process of forming the contact electrodes 310 to 340, the upper surfaces of the first electrode 210 and the second electrode 220 can be formed in the first insulating layer 510 using the process described above, in which a first opening OP1 overlapping the first contact opening CT1 and a second opening OP2 overlapping the second contact opening CT2 are formed. Figure 4A and Figure 6A As shown in the diagram. In some embodiments, the upper surfaces of the first electrode 210 and the second electrode 220 can be exposed by a process that forms a first opening OP1_1 and a second opening OP2_1 in the first insulating layer 510, as illustrated. Figure 4B and Figure 6B As shown, the first opening OP1_1 exposes at least a portion of the upper surface of the first electrode 210 in the first alignment region AA1, and the second opening OP2_1 exposes at least a portion of the upper surface of each of the second electrodes 220 in the third alignment region AA3.

[0260] Next, a third insulating layer 540 can be formed on the entire surface of the substrate SUB to manufacture... Figure 10 The display device 10 shown (for example, see...) Figure 18 ).

[0261] Embodiments of the display device 10 will now be described with reference to the other accompanying drawings. In the following embodiments, redundant descriptions of elements that are the same as or substantially similar to those described above may be omitted or briefly given, and the differences between them will be described primarily.

[0262] Figure 18 It is according to another embodiment along Figure 3 A sectional view taken by line X-X'.

[0263] Figure 18 The display device 10 shown is Figure 10 The difference in the embodiment shown is that the height h2 of the first dam 610 included in the sub-pixel SPX is different from the height h3 of each alignment control pattern 620_1.

[0264] For example, the height h3 of each alignment control pattern 620_1 can be greater than the height h1 of each second dike 410 or 420 and less than the height h2 of the first dike 610.

[0265] Because the height h3 of each alignment control pattern 620_1 is greater than the height h1 of each second dike 410 or 420, the light-emitting element ED can be placed between the first sub-dike 410 and the second sub-dike 420 in the non-alignment area NAA.

[0266] In addition, combined Figure 3 refer to Figure 18 Because the height h3 of each alignment control pattern 620_1 is less than the height h2 of the first embankment 610, the steps (e.g., step height difference) of the second contact electrode 320 and the third contact electrode 330 formed on the alignment control pattern 620_1 can be reduced. The steps of the second contact electrode 320 and the third contact electrode 330 formed on the alignment control pattern 620_1 can be reduced by decreasing the height h3 of each alignment control pattern 620_1, thereby reducing defects in the series-connected electrodes that may be caused by the height h3 of each alignment control pattern 620_1 during the process of forming the contact electrodes 310 to 340 on the alignment control pattern 620_1. For example, the steps of the second contact electrode 320 and the third contact electrode 330 disposed in the misalignment region NAA caused by the height h3 of each alignment control pattern 620_1 can be reduced during the process of forming the second contact electrode 320 and the third contact electrode 330. By reducing the steps of the third region 323 of the second contact electrode 320 and the third region 333 of the third contact electrode 330, defects in the contact electrodes can be reduced, and series connection defects between the first light-emitting element ED and the third light-emitting element ED can be prevented.

[0267] In the illustrated embodiment, the first dam 610 and alignment control pattern 620_1 with different heights can be formed using the same masking process. For example, the first dam 610 and alignment control pattern 620_1 can be formed by coating an organic material onto a substrate SUB on which the first insulating layer 510 is formed, and then exposing and developing the organic material. The first dam 610 and alignment control pattern 620_1 with different heights can be formed using halftone masks, multitone masks, or slit masks. However, this disclosure is not limited to this, and the first dam 610 and alignment control pattern 620_1 can be formed sequentially using different masks.

[0268] In the illustrated embodiment, because the height h3 of each alignment control pattern 620_1 is greater than the height h1 of each second dike 410 or 420 and less than the height h2 of the first dike 610, the light-emitting element ED does not need to be aligned (or positioned) in the misalignment area NAA. This reduces the number of lost light-emitting elements ED, while also reducing defects in the series connection electrodes provided on the alignment control pattern 620_1 for connecting the individual light-emitting elements ED in the alignment areas AA (AA1 to AA3) in series with each other. Therefore, the reliability of the display device 10 can be improved.

[0269] Figure 19 It is according to another embodiment along Figure 3 A sectional view taken by line X-X'.

[0270] Figure 19 The display device 10 shown is Figure 10 The difference in the embodiment shown is that the height h4 of the second insulating layer 520_1 included in the sub-pixel SPX is greater than the height h1 of each second dike 410 or 420.

[0271] In the illustrated embodiment, the second insulating layer 520_1 disposed on the light-emitting element ED may include an organic insulating material. For example, the second insulating layer 520_1 may include, but is not limited to, acrylic resin, epoxy resin, phenolic resin, polyamide resin, polyimide resin, unsaturated polyester resin, polyphenylene resin, polyphenylene sulfide resin, benzocyclobutene, cardo resin, siloxane resin, silsesquioxane resin, polymethyl methacrylate, polycarbonate, or polymethyl methacrylate-polycarbonate synthetic resin.

[0272] When the second insulating layer 520_1 comprises an organic insulating material, the thickness d of the second insulating layer 520_1 can be greater than [a certain value]. Figure 10 The second insulating layer 520, which includes inorganic insulating material (see, for example, [reference]). Figure 10 The thickness d of the second insulating layer 520_1. Therefore, the height h4 of the second insulating layer 520_1 can be greater than the height h1 of each second dike 410 or 420 and less than the height h2 of the first dike 610 and the height h3 of each alignment control pattern 620. Although this disclosure is not limited to this embodiment, when the second insulating layer 520_1 comprises an organic insulating material, the thickness d of the second insulating layer 520_1 can be in the range of 1 μm to 2 μm.

[0273] Figure 20 It is according to another embodiment along Figure 3 A sectional view taken by line X-X'.

[0274] Combination Figure 3 , Figure 20 The display device 10 shown is Figure 10 The difference in the embodiment shown is that the width W2 on the first direction DR1 of each alignment control pattern 620_2 included in the sub-pixel SPX is greater than the gap W3 between the second dikes 410 and 420.

[0275] For example, the width W2 of each alignment control pattern 620_2 in the first direction DR1 can be greater than the gap W3 in the first direction DR1 between the first sub-dikes 410 and each second sub-dike 420 that are arranged adjacent to each other. Because the width W2 of each alignment control pattern 620_2 is greater than the gap W3 between the first sub-dikes 410 and the second sub-dikes 420, each alignment control pattern 620_2 can completely cover the side surfaces of the first sub-dikes 410 and the second sub-dikes 420 disposed in the misalignment region NAA, and can also be disposed on a portion of the upper surface of each of the first sub-dikes 410 and the second sub-dikes 420. For example, each alignment control pattern 620_2 can overlap with at least a portion of the side surfaces and upper surfaces of each of the first sub-dikes 410 and the second sub-dikes 420 disposed in the misalignment region NAA.

[0276] In the illustrated embodiment, because each alignment control pattern 620_2 is disposed not only on the side surfaces of the first sub-dike 410 and the second sub-dike 420 disposed in the misalignment region NAA, but also on at least a portion of the upper surfaces of each of the first sub-dike 410 and the second sub-dike 420, the step (e.g., step height difference) of the second contact electrode 320 and the third contact electrode 330 formed on the alignment control pattern 620_2 can be reduced. For example, because each alignment control pattern 620_2 is also disposed on the upper surfaces of the second dikes 410 and 420, the step of the second contact electrode 320 and the third contact electrode 330 formed on the alignment control pattern 620_2 can be reduced to the difference (h3-h1) between the height h3 of each alignment control pattern 620_2 and the height h1 of each second dike 410 or 420. Therefore, the reduced steps of the third region 323 of the second contact electrode 320 and the third region 333 of the third contact electrode 330 can reduce defects in the contact electrodes and prevent series connection defects between the first light-emitting element ED and the third light-emitting element ED.

[0277] Figure 21 This is a planar layout diagram of the sub-pixel SPX of the display device 10 according to the embodiment. Figure 22 It is along Figure 21 A sectional view taken from line XXII-XXII'.

[0278] Figure 21 and Figure 22 The display device 10 shown is Figure 10The difference in the embodiment shown is that a plurality of alignment control patterns 620_3 disposed between the alignment regions AA (AA1 to AA3) of the sub-pixel SPX are integrated with each other in the first direction DR1 to form an alignment control pattern 620_3.

[0279] For example, the alignment control pattern 620_3, located between the first alignment region AA1 and the second alignment region AA2, and between the second alignment region AA2 and the third alignment region AA3, can extend along the first direction DR1. The alignment control pattern 620_3 can extend along the first direction DR1 to cover all areas between the first sub-dike 410 and the second sub-dike 420 located on the right and left sides of the first sub-dike 410. The alignment control pattern 620_3 can completely cover both side surfaces and the top surface of the first sub-dike 410 located in the non-alignment region NAA. The top surface of the alignment control pattern 620_3 can have the same height in each region. Therefore, the alignment control pattern 620_3 may not have a stepped structure.

[0280] In the illustrated embodiment, because multiple alignment control patterns 620_3 are integrally formed on the first direction DR1 to cover the area between the second sub-dike 420 on the left and the second sub-dike 420 on the right, as well as the first sub-dike 410 in the misalignment region NAA, the upper surfaces of the alignment control patterns 620_3 can lie in the same plane along the first direction DR1. Therefore, each contact electrode 320 or 330 formed on the alignment control pattern 620_3 can be without steps in the area overlapping with the first sub-dike 410 along the third direction DR3. Therefore, as described above, defects in the third region 323 of the second contact electrode 320 and the third region 333 of the third contact electrode 330 can be reduced, and series connection defects between the first light-emitting element ED and the third light-emitting element ED can be prevented.

[0281] Figure 23 This is a planar layout diagram of the sub-pixel SPX of the display device 10 according to the embodiment. Figure 24 It shows the setting Figure 23 A plan view of the arrangement relationship of alignment control pattern 620_4 in the diagram. Figure 25 yes Figure 23 A cross-sectional view of an example of the display device 10 shown.

[0282] Figures 23 to 25 The display device 10 shown is Figure 10 The difference in the embodiment shown is that the width W2 of each alignment control pattern 620_4 included in the sub-pixel SPX on the first direction DR1 is smaller than the length l of each light-emitting element ED.

[0283] For example, the width W2 of each alignment control pattern 620_4 in the first direction DR1 can be smaller than the gap W3 in the first direction DR1 between the first sub-dikes 410 and the second sub-dikes 420 that are arranged adjacent to each other. The width W2 of each alignment control pattern 620_4 in the first direction DR1 can be smaller than the length l of each light-emitting element ED. The width W2 of each alignment control pattern 620_4 in the first direction DR1 can be equal to the width W1 of the second insulating layer 520 disposed on the light-emitting element ED. However, this disclosure is not limited thereto.

[0284] The gap dx between the alignment control patterns 620_4 spaced apart on the first direction DR1 can be greater than the length l of each light-emitting element ED. In the illustrated embodiment, because the width W2 of each alignment control pattern 620_4 is small, and the gap dx between adjacent alignment control patterns 620_4 on the first direction DR1 is greater than the length l of each light-emitting element ED, the proportion of the planar area of ​​the alignment control pattern 620_4 in the planar area of ​​the emission area EMA in the planar view can be reduced. Therefore, in the inkjet process for ejecting ink I during the manufacturing process of the display device 10 as described above, the volume (or area) of the space in which ink I in which light-emitting elements ED are dispersed can be increased. Therefore, the impact area can be increased, making it easier to control the impact position of ink I. Therefore, the manufacturing process efficiency of the inkjet process during the manufacturing process of the display device 10 can be improved.

[0285] Even when ink I, in which light-emitting elements ED are dispersed, is sprayed into areas of the emitting region EMA other than those where alignment control patterns 620_4 are provided, ink I can flow between alignment control patterns 620_4 and / or between the first dike 610 and each alignment control pattern 620_4 due to the fluidity of ink I. Therefore, even when ink I, in which light-emitting elements ED are dispersed, is sprayed into areas of the emitting region EMA other than those where alignment control patterns 620_4 are provided, the first alignment regions AA1 to the third alignment regions AA3 can be coated with ink I. Furthermore, because the gap dx between adjacent alignment control patterns 620_4 in the first direction DR1 is greater than the length l of each light-emitting element ED, the light-emitting elements ED dispersed in ink I can easily move from one alignment region AA to another alignment region AA by passing between alignment control patterns 620_4 and / or between the first dike 610 and each alignment control pattern 620_4.

[0286] Figure 26 This is a planar layout diagram of the sub-pixel SPX of a display device according to an embodiment.

[0287] Figure 26 The implementation methods shown are the same as Figure 3 The difference in the embodiment shown is that it includes a plurality of first electrodes 210 spaced apart from each other in the first direction DR1.

[0288] For example, it may include three first electrodes 210 spaced apart from each other in a first direction DR1. Each second electrode 220 may be disposed between the first electrodes 210 spaced apart from each other. In the illustrated embodiment, the first electrode 210_1 disposed on the right side of the emitter region EMA may include an extension 210B and a protrusion 210P protruding from a portion of the extension 210B. A first contact opening (e.g., a first contact hole) CT1 disposed on the right side of the emitter region EMA may overlap with the protrusion 210P in a third direction DR3. The protrusion 210P of the first electrode 210_1 may receive a first power supply voltage from the first voltage wiring VL1 through the first contact opening CT1.

[0289] The first contact electrode 310_1 may have a first region 311, a second region 312, and a protrusion 313.

[0290] The first region 311 of the first contact electrode 310_1 can be disposed on the first electrode 210 disposed in the first alignment region AA1 to contact the first end of the first light-emitting element ED. The first regions 311 of the first contact electrode 310_1 can be spaced apart from each other in the first direction DR1.

[0291] The second region 312 of the first contact electrode 310_1 can be connected to the spaced-apart first regions 311 of the first contact electrode 310_1. The second region 312 of the first contact electrode 310_1 can be disposed on the upper side of the first region 311 of the first contact electrode 310_1 to extend in the first direction DR1.

[0292] The protruding portion 313 of the first contact electrode 310_1 can overlap with the protruding portion 210P of the first electrode 210_1 on the third-direction DR3. The protruding portion 313 of the first contact electrode 310_1 can contact the protruding portion 210P of the first electrode 210_1. Because the protruding portions 313 and 210P of the first contact electrode 310_1 are in contact with each other, the first power supply voltage applied from the first voltage wiring VL1 through the first contact opening CT1 can be transmitted to the first light-emitting element ED through the first contact electrode 310_1.

[0293] The second contact electrode 320 and the third contact electrode 330 may each include second regions 322 and 332 disposed on the first electrode 210 in the second alignment region AA2 and the third alignment region AA3, respectively, and the second regions 322 and 332 may include a plurality of contact electrodes spaced apart from each other. For example, each of the second contact electrode 320 and the third contact electrode 330 may include three second regions 322 or 332 spaced apart from each other in the first direction DR1.

[0294] In the illustrated embodiment, four alignment control patterns 620 spaced apart from each other along the first direction DR1 can be set in the non-alignment region NAA between the alignment regions AA1 to AA3.

[0295] Those skilled in the art will understand that many variations and modifications can be made to the embodiments described herein without substantially departing from this disclosure. Therefore, the embodiments disclosed herein are to be understood in a general and descriptive sense and are not intended to be limiting.

Claims

1. A display device, including: Substrate; as well as A pixel, situated on the substrate, having an alignment region and an unaligned region extending around the periphery of the alignment region, the alignment region having a first alignment region and a second alignment region spaced apart from the first alignment region in a first direction, the pixel comprising: The first electrode and the second electrode extend in the first direction across the first alignment region, the misaligned region between the first alignment region and the second alignment region, and the second alignment region and are spaced apart from each other. The first dike extends in the misaligned region and along the boundary of the pixel; The alignment control layer includes a first alignment control pattern, which is spaced apart from the first dam in the non-alignment region between the first alignment region and the second alignment region. A first light-emitting element is located between the first electrode and the second electrode in the first alignment region; A first contact electrode is located on the first electrode in the first alignment region and contacts the first end of the first light-emitting element; and The second contact electrode extends across the misaligned region between the first alignment region and the second alignment region, and extends into the second alignment region, and is spaced apart from the first contact electrode.

2. The display device of claim 1, wherein, The second contact electrode has a first region on the second electrode in the first alignment region and in contact with the second end of the first light-emitting element, a second region on the first electrode in the second alignment region, and a third region in the unaligned region to connect the first region of the second contact electrode and the second region of the second contact electrode.

3. The display device of claim 2, wherein, The pixels also include: A second light-emitting element is located in the second alignment region between the first electrode and the second electrode; and The third contact electrode has a first region on the second electrode in the second alignment region. The third contact electrode is spaced apart from the first contact electrode and the second contact electrode. The second region of the second contact electrode contacts the first end of the second light-emitting element, and the first region of the third contact electrode contacts the second end of the second light-emitting element.

4. The display device according to claim 3, wherein, The first light-emitting element and the second light-emitting element are connected in series with each other.

5. The display device of claim 3, wherein, The pixels also include: The third light-emitting element; and Fourth contact electrode, The alignment region includes a third alignment region spaced apart from the second alignment region in the first direction. The third light-emitting element is located in the third alignment region between the first electrode and the second electrode. Wherein, the fourth contact electrode is on the second electrode in the third alignment region, and The fourth contact electrode is spaced apart from the first to the third contact electrodes.

6. The display device according to claim 5, wherein, The third contact electrode has a second region on the first electrode in the third alignment region and a third region in the misalignment region to connect the first region and the second region of the third contact electrode. The second region of the third contact electrode contacts the first end of the third light-emitting element, and the fourth contact electrode contacts the second end of the third light-emitting element.

7. The display device according to claim 6, wherein, The first light-emitting element to the third light-emitting element are connected in series with each other.

8. The display device of claim 6, wherein, The alignment control layer further includes a second alignment control pattern in the misalignment area between the second alignment area and the third alignment area, and The second alignment control pattern is spaced apart from the first dike.

9. The display device according to claim 2, wherein, A portion of the third region of the second contact electrode overlaps with the first alignment control pattern in the thickness direction of the substrate.

10. The display device of claim 1, wherein, The first alignment control pattern is located between the first electrode and the second electrode.

11. The display device of claim 1, wherein, Each of the first dike and the alignment control layer includes a hydrophobic material.

12. The display device of claim 1, wherein, The first dike and the alignment control layer comprise the same material.

13. A display device, including: A pixel has a plurality of aligned regions spaced apart from each other in a first direction and an unaligned region other than the plurality of aligned regions; Multiple electrodes extend in the pixel in the first direction and are spaced apart from each other in a second direction perpendicular to the first direction; A plurality of light-emitting elements are located between a plurality of electrodes in each of the plurality of alignment regions, and at least one end of each of the plurality of light-emitting elements is located on any one of the plurality of electrodes in the respective alignment region of the plurality of alignment regions; The first dike extends along the boundary of the pixel in the unaligned region; as well as Multiple alignment control patterns are spaced apart from the first dike in the misalignment regions between the multiple alignment regions. The plurality of alignment control patterns are spaced apart from each other in the second direction, and each of the plurality of alignment control patterns overlaps with the region between the plurality of electrodes in the thickness direction, and overlaps only a portion of two adjacent electrodes in the second direction in the thickness direction.

14. The display device according to claim 13, wherein, Each of the first dike and the alignment control pattern includes a hydrophobic material.

15. The display device of claim 13, further comprising an insulating layer on each of the plurality of light-emitting elements in each of the plurality of alignment regions, and exposing both ends of each of the plurality of light-emitting elements. wherein The insulating layer and the plurality of alignment control patterns are spaced apart from each other.

16. A display device, including: Substrate; A pixel having an alignment region and an unaligned region extending around the periphery of the alignment region, the alignment region having a first alignment region and a second alignment region spaced apart from each other; The first electrode is on the substrate; The second electrode is located on the substrate and spaced apart from the first electrode; The first dike extends along the boundary of the pixel in the unaligned region; An alignment control pattern is located on the substrate and in the misalignment region between the first and second electrodes, and the alignment control pattern is spaced apart from the first dam. The light-emitting element includes a plurality of first light-emitting elements in the first alignment region between the first electrode and the second electrode, and a plurality of second light-emitting elements in the second alignment region between the first electrode and the second electrode; The first contact electrode contacts the first end of the plurality of first light-emitting elements; The second contact electrode contacts the second end of the plurality of first light-emitting elements and the first end of the plurality of second light-emitting elements.

17. The display device of claim 16, wherein, The height from the surface of the substrate to the upper surface of the first dam is greater than or equal to the height from the surface of the substrate to the upper surface of the alignment control pattern.

18. The display device according to claim 16, wherein, The width of the alignment control pattern is greater than the length of each of the light-emitting elements.

19. The display device according to claim 16, further comprising: The third contact electrode contacts the second end of the plurality of second light-emitting elements. The first contact electrode to the third contact electrode are spaced apart from each other, and the second contact electrode connects the plurality of first light-emitting elements and the plurality of second light-emitting elements in series.

20. The display device according to claim 19, wherein, The second contact electrode has a first region in the first alignment region that contacts the second end of the plurality of first light-emitting elements, a second region in the second alignment region that contacts the first end of the plurality of second light-emitting elements, and a third region in the unaligned region between the first alignment region and the second alignment region that connects the first region of the second contact electrode and the second region of the second contact electrode.

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