Display device

Abstract

A display device is provided. The display device includes a substrate including a plurality of pixels, an electrode unit disposed in each of the pixels of the substrate, wherein the electrode unit includes a first electrode having a center of curvature and including a first outer edge having a curved shape, and a second electrode including a second outer edge having a curved shape corresponding to the first outer edge, thereby being spaced apart from and facing the first electrode, and a plurality of light emitting elements disposed between the first electrode and the second electrode, wherein the first electrode is disposed such that the center of curvature is located at an outer portion of each of the pixels, and the first outer edge faces a center of each of the pixels.

Description

Technical Field

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

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

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

[0004] Technical issues

[0005] This disclosure provides a display device including electrodes having curved side surfaces and facing each other.

[0006] This disclosure also provides a display device in which electrodes are disposed around the peripheral portion of each pixel, and curved side surfaces face the central portion of each pixel.

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

[0008] Technical solution

[0009] According to a disclosed embodiment, the display device includes: a substrate including a plurality of pixels; an electrode unit disposed in each of the pixels of the substrate, and including a first electrode and a second electrode, the first electrode including a first outer edge having a center of curvature and a curved shape, the second electrode including a second outer edge having a curved shape corresponding to the first outer edge, and being spaced apart from and facing the first electrode; and a plurality of light-emitting elements disposed between the first electrode and the second electrode, wherein the first electrode is configured such that the center of curvature is located at the peripheral portion of the pixel and the first outer edge faces the center of the pixel.

[0010] The electrode unit may include a first type of electrode unit, in which the first electrode further includes a first short side extending in a first direction and a second short side extending in a second direction intersecting the first direction, the second short side having a side connected to one side of the first short side, and a first outer side connecting the other side of the first short side to the other side of the second short side, wherein, in the first electrode of the first type of electrode unit, the center of curvature of the first outer side may be located on the side of the first short side.

[0011] The second electrode may further include a third outer edge having a curved shape corresponding to the second outer edge, a third short edge extending in a first direction and connecting one side of the second outer edge to one side of the third outer edge, and a fourth short edge extending in a second direction and connecting the other side of the second outer edge to the other side of the third outer edge.

[0012] The electrode unit may include a first electrode unit and a second electrode unit as a first type of electrode unit. In the first electrode unit, the curvature center of the first outer edge is located on one side of the pixel, and in the second electrode unit, the curvature center of the first outer edge is located on the other side of the pixel.

[0013] The second electrode of the first electrode unit can be directly connected to the second electrode of the second electrode unit.

[0014] The display device may also include a bridging electrode disposed in a pixel and having one side connected to a first electrode of a first electrode unit and the other side connected to a second electrode of a second electrode unit.

[0015] The second electrode may also include an electrode protrusion protruding from a portion of its third outer edge.

[0016] The electrode unit may further include a third electrode disposed between the first electrode and the second electrode and a fourth electrode disposed between the third electrode and the first electrode, wherein the third electrode may have a curved shape corresponding to the second outer edge of the second electrode and the fourth electrode may have a curved shape corresponding to the first outer edge of the first electrode.

[0017] The third and fourth electrodes can be arranged to be spaced apart from each other and facing each other, and some of the light-emitting elements can be arranged between the third and fourth electrodes.

[0018] The display device may further include: a first floating pattern having a shape extending in a first direction and including a portion spaced apart from a first short side of the first electrode and a third electrode in a second direction; and a second floating pattern having a shape extending in a second direction and including a portion spaced apart from a fourth short side of the second electrode and a fourth electrode in the first direction.

[0019] The electrode unit may also include a second type of electrode unit, in which the first electrode includes a fifth short side extending in a first direction, and a first outer side connecting the two sides of the fifth short side, wherein, in the first electrode of the second type of electrode unit, the center of curvature of the first outer side may be located between the two sides of the fifth short side.

[0020] The electrode unit may also include a third type of electrode unit, in which the first electrode has a circular shape.

[0021] The display device may further include: a first contact electrode disposed on the first electrode and including a side that bends along a first outer edge; and a second contact electrode disposed on the second electrode and including a side that bends along a second outer edge, wherein the first contact electrode may contact one end of the light-emitting element and the first electrode, and the second contact electrode may contact the other end of the light-emitting element and the second electrode.

[0022] The first separation distance between the first outer edge of the first electrode and the second outer edge of the second electrode can be greater than the second separation distance between the first contact electrode and the second contact electrode.

[0023] According to the disclosed embodiments, the display device includes: a plurality of first electrodes, each including a first short side and a second short side extending in directions intersecting each other and having one side connected to each other, and a first outer side having a curved shape and connecting the other side of the first short side to the other side of the second short side; a plurality of second electrodes, each of which is configured to be spaced apart from the first outer side of the first electrode and facing the first outer side of the first electrode, and including a second outer side having a curved shape corresponding to the first outer side; and a plurality of light-emitting elements disposed between the first electrodes and the second electrodes, wherein the plurality of light-emitting elements may be disposed between the first outer side and the second outer side and arranged along the curvature of the first outer side.

[0024] The display device may further include a third electrode disposed between the first electrode and the second electrode and a fourth electrode disposed between the third electrode and the first electrode, wherein the third electrode may have a curved shape corresponding to the second outer edge of the second electrode, and the fourth electrode may have a curved shape corresponding to the first outer edge of the first electrode.

[0025] The display device may further include a first contact electrode disposed on a first electrode and including a side that bends along a first outer edge, and a second contact electrode disposed on a second electrode and including a side that bends along a second outer edge.

[0026] The first outer edge and the second outer edge may have the same center of curvature, at least some of the plurality of first electrodes may have different centers of curvature, and at least some of the plurality of second electrodes may have different centers of curvature.

[0027] At least some of the second electrodes, which have different centers of curvature, can be directly connected to each other.

[0028] The display device may further include a bridging electrode connecting the first electrode to a second electrode having a curvature center different from that of the first electrode.

[0029] Details of other embodiments are included in the detailed description and accompanying drawings.

[0030] Beneficial effects

[0031] A display device according to one embodiment includes a first electrode and a second electrode. The first electrode includes a curved outer edge and has a center of curvature. The second electrode includes a curved outer edge corresponding to the outer edge of the first electrode and has the same center of curvature as the outer edge of the first electrode. The display device includes a plurality of first electrodes and a plurality of second electrodes for each pixel or sub-pixel, and each of the plurality of first electrodes and the plurality of second electrodes can be configured such that its center of curvature is located at the peripheral portion of the pixel or sub-pixel.

[0032] Therefore, in a display device, the ratio of the unit area occupied by electrodes disposed per unit area of ​​each pixel or sub-pixel can be increased, and the number of light-emitting elements disposed per unit area can be increased. In a display device according to one embodiment, the amount of light emitted per unit area of ​​each pixel or sub-pixel can be increased.

[0033] The effects of the embodiments are not limited to those illustrated above, and many more effects are included in this disclosure. Attached Figure Description

[0034] Figure 1 This is a plan view of a display device according to one embodiment.

[0035] Figure 2 This is a plan view showing a pixel of a display device according to one embodiment.

[0036] Figure 3 This is a plan view illustrating a sub-pixel of a display device according to one embodiment.

[0037] Figure 4 This is a schematic plan view showing an electrode unit according to one embodiment.

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

[0039] Figure 6 This is a schematic layout diagram showing the electrode unit and alignment lines according to one embodiment.

[0040] Figure 7 It is along Figure 6 The sectional view taken from line II-II'.

[0041] Figure 8 It is along Figure 6 The sectional view taken from line III-III'.

[0042] Figure 9 This is a schematic diagram of a light-emitting element according to one embodiment.

[0043] Figures 10 to 12 This is a plan view illustrating a portion of the manufacturing process of a display device according to one embodiment.

[0044] Figure 13 This is a plan view showing a sub-pixel of a display device according to another embodiment.

[0045] Figure 14 This is a plan view showing a sub-pixel of a display device according to yet another embodiment.

[0046] Figure 15 This is a plan view showing a sub-pixel of a display device according to another embodiment.

[0047] Figure 16 It is shown Figure 15 A schematic plan view of the electrode unit of the display device.

[0048] Figure 17 It is shown Figure 15 A schematic layout diagram of the electrode units and alignment lines of the display device.

[0049] Figure 18 It is along Figure 15 A sectional view taken from line IV-IV'.

[0050] Figure 19 This is a plan view showing a sub-pixel of a display device according to another embodiment.

[0051] Figure 20 This is a plan view showing a sub-pixel of a display device according to another embodiment.

[0052] Figure 21 and Figure 22 The above are plan views of a sub-pixel of a display device according to another embodiment.

[0053] Figure 23 This is a plan view showing a sub-pixel of a display device according to another embodiment.

[0054] Figure 24 and Figure 25 It is shown Figure 23 A plan view of a part of the manufacturing process of a display device.

[0055] Figure 26 This is a plan view showing a sub-pixel of a display device according to another embodiment. Detailed Implementation

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

[0057] It will also be understood that when a layer is referred to as being "on" another layer or substrate, the layer may be directly on said other layer or substrate, or an intervening layer may be present. Throughout the specification, the same reference numerals denote the same components.

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

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

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

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

[0062] The display device 10 includes a display panel that provides a displayed image. Examples of display panels may include inorganic light-emitting diode (LED) display panels, organic light-emitting diode (OLED) display panels, quantum dot (QD) light-emitting diode (OLED) display panels, plasma display panels, and field emission display panels, etc. Although the following example illustrates the use of an inorganic LED display panel, the invention is not limited thereto, and the same technical spirit can be applied to other display panels where applicable.

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

[0064] Display device 10 may include a display area DPA and a non-display area NDA. The display area DPA is the area where an image can be displayed, and the non-display area NDA is the area where no image is displayed. The display area DPA may represent an active area, and the non-display area NDA may represent an inactive area. The display area DPA typically occupies the center of the display device 10.

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

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

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

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

[0069] Each of the sub-pixels PXn in the display device 10 may include a region defined as a light-emitting region EMA. A first sub-pixel PX1 may include a first light-emitting region EMA1, a second sub-pixel PX2 may include a second light-emitting region EMA2, and a third sub-pixel PX3 may include a third light-emitting region EMA3. The light-emitting region EMA may be defined as a region in which a light-emitting element 300 included in the display device 10 is disposed to emit light within a specific wavelength range. The light-emitting element 300 includes an active layer 330 (see...). Figure 9 The active layer 330 can emit non-directional light within a specific wavelength range. Light emitted from the active layer 330 of the light-emitting element 300 can also be emitted in multiple directions toward the side surfaces of the light-emitting element 300, including its two ends. The light-emitting region EMA can include the area in which the light-emitting element 300 is disposed, and can include the area adjacent to the light-emitting element 300 through which light emitted from the light-emitting element 300 is emitted.

[0070] The invention is not limited thereto, and the light-emitting region EMA may also include a region in which light emitted from the light-emitting element 300 is reflected or refracted by another component and emitted. A plurality of light-emitting elements 300 may be disposed in each sub-pixel PXn, and the region in which the light-emitting elements 300 are disposed and the region adjacent to said region form the light-emitting region EMA.

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

[0072] Each sub-pixel PXn of the display device 10 may include a plurality of electrodes 210 and 220, a plurality of light-emitting elements 300, and a plurality of contact electrodes 260. Furthermore, the display device 10 may also include an outer embankment 450 configured to surround each sub-pixel PXn. According to one embodiment, the display device 10 may include a first electrode 210 and a second electrode 220, both having curved sides, thereby increasing the number of light-emitting elements 300 disposed per unit area of ​​each sub-pixel PXn. Furthermore, the light-emitting elements 300 may be disposed between the curved sides of the electrodes 210 and 220, and each sub-pixel PXn may have various light-emitting directions. Hereinafter, the electrodes 210 and 220 and the light-emitting elements 300 disposed in each sub-pixel PXn of the display device 10 will be described in further detail with reference to other accompanying drawings.

[0073] Figure 3 This is a plan view illustrating a sub-pixel of a display device according to one embodiment. Figure 4 This is a schematic plan view showing an electrode unit according to one embodiment.

[0074] Figure 3 Only shown Figure 2 The first sub-pixel PX1, Figure 4 An enlarged view of the electrode unit EU, including the first electrode 210 and the second electrode 220, is shown.

[0075] Reference Figure 3 and Figure 4 Each of the sub-pixels PXn in the display device 10 may include an electrode unit EU comprising a plurality of electrodes 210 and 220. The electrode unit EU may include a first electrode 210 and a second electrode 220, and one sub-pixel PXn may include a plurality of electrode units EU. For example, as... Figure 3 As shown, a sub-pixel PXn may include a first electrode unit EU1, a second electrode unit EU2, a third electrode unit EU3, and a fourth electrode unit EU4. Figure 4It shows that it includes Figure 3 The first electrode 210 and the second electrode 220 in the first electrode unit EU1.

[0076] In a detailed description, the first electrode 210 of the electrode unit EU may have a curved shape on at least one side. For example, the first electrode 210 may include a first short side SS1 extending in a first direction DR1, a second short side SS2 extending in a second direction DR2, and a first outer side OS1 configured to connect the first short side SS1 and the second short side SS2 and having a curved shape. The first short side SS1 and the second short side SS2 of the first electrode 210 may extend in directions that intersect each other, one side of the first short side SS1 and one side of the second short side SS2 may be connected to each other, and the other side of the first short side SS1 and the other side of the second short side SS2 may be connected to the first outer side OS1.

[0077] In an exemplary embodiment, the first electrode 210 may have a quarter-circular shape in a plan view. For example... Figure 4 As shown, in the first electrode 210, the first short side SS1 and the second short side SS2 can extend perpendicularly to each other, and the first outer side OS1 can have a curved shape with respect to the portion where the first short side SS1 and the second short side SS2 connect to each other. That is, the first outer side OS1 of the first electrode 210 can be an arc shape with the center of curvature at the side where the first short side SS1 and the second short side SS2 are interconnected and with the shape of the first electrode 210 being a quarter circle.

[0078] However, the invention is not limited thereto. As long as the first electrode 210 includes a first outer edge OS1 having a shape curved about a specific center of curvature, the first short edges SS1 and SS2 do not necessarily need to have shapes that intersect each other. For example, the first electrode 210 may have a shape in which the first short edges SS1 and SS2 do not intersect each other or extend in one direction. Furthermore, in the first electrode 210, the first short edges SS1 and SS2 may not be directly connected to each other, and the first electrode 210 may also include another side through which the first short edges SS1 and SS2 can be connected to each other. This other side may extend in one direction or have a curved shape similar to the first outer edge OS1.

[0079] Furthermore, the first electrode 210 can be electrically connected to a wire disposed below the first electrode 210 via a first contact hole CT1 passing through at least some layers in the layer disposed below the first electrode 210. A description of this will be provided below.

[0080] The second electrode 220 can be configured to be spaced apart from and facing the first electrode 210. The second electrode 220 can be configured to be spaced apart from and facing the curved first outer edge OS1 of the first electrode 210, and can include an edge curved along the first outer edge OS1. For example, the second electrode 220 can include a second outer edge OS2 and a third outer edge OS3, a third short edge SS3 connecting one side of the second outer edge OS2 to one side of the third outer edge OS3, and a fourth short edge SS4 connecting the other side of the second outer edge OS2 to the other side of the third outer edge OS3. The second outer edge OS2 and the third outer edge OS3 correspond to the first outer edge OS1 and have the same curvature as the first outer edge OS1. The second outer edge OS2 of the second electrode 220 can be spaced apart from and facing the first outer edge OS1 of the first electrode 210, and the third outer edge OS3 can be an edge opposite to the second outer edge OS2. The second outer edge OS2 and the third outer edge OS3 can have the same curvature and center of curvature. However, the length of the second outer edge OS2 can be less than the length of the third outer edge OS3 because the second outer edge OS2 is positioned closer to the center of curvature.

[0081] The third short side SS3 of the second electrode 220 may have a shape extending in the first direction DR1, and the fourth short side SS4 may have a shape extending in the second direction DR2. In one embodiment, the first short side SS1 of the first electrode 210 and the third short side SS3 of the second electrode 220 may extend in the first direction DR1 to be collinear with each other, and the second short side SS2 of the first electrode 210 and the fourth short side SS4 of the second electrode 220 may extend in the second direction DR2 to be collinear with each other.

[0082] In an exemplary embodiment, the second electrode 220 may include a portion having a specific planar width and a curved arcuate shape. The second electrode 220 may be spaced apart from and face the first outer edge OS1 of the first electrode 210 by including a portion having a curved arcuate shape. In other words, the second outer edge OS2 of the second electrode 220 may have at least the same center of curvature as the first outer edge OS1 of the first electrode 210.

[0083] However, the invention is not limited thereto. As long as the second electrode 220 includes a second outer edge OS2 having a curved shape corresponding at least to the first outer edge OS1 of the first electrode 210, the third outer edge OS3 and the third short edges SS3 and SS4, as other edges, can have different shapes. For example, the second electrode 220 may include a structure that includes the second outer edge OS2 but omits the third outer edge OS3, such that the third short edges SS3 and SS4 are directly connected to each other, and may also include other edges between the third short edges SS3 and SS4 in addition to the third outer edge OS3. The description is the same as that described above with reference to the first electrode 210.

[0084] The second electrode 220 may further include a portion connected to and protruding from one side of a portion having a curved, arcuate shape. According to one embodiment, the second electrode 220 may include an electrode curved portion 220R having a curved, arcuate shape, and an electrode protrusion 220P connected to and protruding from one side of the electrode curved portion 220R. The electrode protrusion 220P may have a shape protruding in one direction and may be connected to the electrode curved portion 220R. For example, as... Figure 4 As shown, the electrode protrusion 220P can protrude in one direction from the third outer edge OS3 of the electrode bend 220R. The electrode protrusion 220P can be a portion electrically connected to a wire disposed below the second electrode 220. Figure 4 In the diagram, the second electrode 220 is shown as including an electrode bend 220R and an electrode protrusion 220P, but the invention is not limited thereto. In some embodiments, the electrode unit EU may include a second electrode 220 in which the electrode protrusion 220P is omitted and only includes the electrode bend 220R having a curved arc shape.

[0085] Furthermore, the second electrode 220 can be electrically connected to a wire disposed below the second electrode 220 via a second contact hole CT2 and a third contact hole CT3 passing through at least some layers disposed below the second electrode 220. A description of this is provided below.

[0086] Meanwhile, in an exemplary embodiment, in some of the electrode units EU disposed in each sub-pixel PXn, the second electrode 220 may not include the electrode protrusion 220P, and in at least one electrode unit EU, the second electrode 220 may include the electrode protrusion 220P. The electrode protrusion 220P may be electrically connected to a line disposed beneath it, such as a voltage line, and the electrode unit EU including the electrode protrusion 220P may directly receive electrical signals from the voltage line. However, the invention is not limited thereto.

[0087] Figure 4 and Figure 5The electrode unit EU shown can be an electrode unit EU in which the first electrode 210 has a quarter-circular shape. That is, an electrode unit EU including a first type of first electrode 210 having a quarter-circular shape by including a first outer edge OS1 and a second electrode 220 configured to surround the first outer edge OS1 can be a first type of electrode unit. In addition to the first type of electrode unit including the first type of first electrode 210, the display device 10 according to one embodiment may also include a first electrode 210 having various shapes. For example, the electrode unit EU may include another type of electrode unit EU, which includes a first electrode 210 having a semi-circular or circular shape and a second electrode 220 corresponding to the first electrode 210 and surrounding the first outer edge OS1. This will be described below with reference to other embodiments.

[0088] Multiple light-emitting elements 300 can be disposed between the first electrode 210 and the second electrode 220. As an example, the light-emitting elements 300 can be spaced apart from each other between the first electrode 210 and the second electrode 220. However, there is no particular limitation on the separation distance between the light-emitting elements 300. In some cases, multiple light-emitting elements 300 can be disposed adjacent to each other to form a group, and multiple other light-emitting elements 300 can be grouped at predetermined intervals and can be configured to have a non-uniform density.

[0089] According to one embodiment, the light-emitting element 300 may include an active layer 330 of different materials to emit light in different wavelength ranges. According to one embodiment, the display device 10 may include a light-emitting element 300 that emits light in different wavelength ranges. The light-emitting element 300 of the first sub-pixel PX1 may include an active layer 330 that emits light of a first color having a first wavelength at a center wavelength range; the light-emitting element 300 of the second sub-pixel PX2 may include an active layer 330 that emits light of a second color having a second wavelength at a center wavelength range; and the light-emitting element 300 of the third sub-pixel PX3 may include an active layer 330 that emits light of a third color having a third wavelength at a center wavelength range.

[0090] Therefore, light of a first color can be emitted from the first sub-pixel PX1, light of a second color can be emitted from the second sub-pixel PX2, and light of a third color can be emitted from the third sub-pixel PX3. In some embodiments, the first color light can be blue light with a center wavelength range in the range of 450 nm to 495 nm, the second color light can be green light with a center wavelength range in the range of 495 nm to 570 nm, and the third color light can be red light with a center wavelength range in the range of 620 nm to 752 nm. However, the invention is not limited thereto. In some cases, the first sub-pixel PX1, the second sub-pixel PX2, and the third sub-pixel PX3 may include the same type of light-emitting element 300 emitting light of substantially the same color.

[0091] According to one embodiment, the light-emitting element 300 can be disposed in a space in which the first electrode 210 and the second electrode 220 are spaced apart from each other (i.e., between the first outer edge OS1 and the second outer edge OS2). The first outer edge OS1 and the second outer edge OS2 can both have a curved shape, and a plurality of light-emitting elements 300 disposed between the first outer edge OS1 and the second outer edge OS2 can be arranged along the first outer edge OS1 and the second outer edge OS2 that are curved about the center of the first electrode 210.

[0092] As shown in the accompanying drawings, a plurality of light-emitting elements 300 may have a shape extending in one direction. Each of the light-emitting elements 300 may have an orientation direction oriented in its extending direction, and the light-emitting elements 300 disposed between the first electrode 210 and the second electrode 220 may have different orientation directions. For example, among the plurality of light-emitting elements 300, the light-emitting element 300 disposed between the first outer edge OS1 and the second outer edge OS2 and adjacent to the first short edge SS1 and the third short edge SS3 may be configured such that the orientation direction of the light-emitting element 300 points towards the first direction DR1. Among the plurality of light-emitting elements 300, the light-emitting element 300 disposed between the first outer edge OS1 and the second outer edge OS2 and adjacent to the second short edge SS2 and the fourth short edge SS4 may be configured such that the orientation direction of the light-emitting element 300 points towards the second direction DR2. Furthermore, the light-emitting elements 300 disposed between the above-mentioned light-emitting elements 300 may be configured such that the orientation direction of the light-emitting element 300 points towards the direction between the first direction DR1 and the second direction DR2. In other words, multiple light-emitting elements 300 can be arranged along the bending direction of the first outer edge OS1 and the second outer edge OS2, and can have different orientation directions.

[0093] As described below, the light-emitting element 300 can be electrically connected to the first electrode 210 and the second electrode 220, and receives electrical signals from the first electrode 210 and the second electrode 220 to emit light within a specific wavelength range. The light-emitting element 300 can emit light at both ends in its extending direction. According to one embodiment, the display device 10 may include the first electrode 210 and the second electrode 220, each of which has at least one side having a curved shape, wherein the curved sides are spaced apart from each other and face each other, and the orientation of the light-emitting element 300 disposed between them can be different. In each sub-pixel PXn, light can be emitted in various directions, not limited to a specific direction, and the visibility of the display device 10 can be improved in various directions.

[0094] Furthermore, according to one embodiment, the display device 10 may include one or more electrode units EU, in which light-emitting elements 300 with various orientations are provided for each sub-pixel PXn. For example, a sub-pixel PXn may include a first electrode unit EU1, a second electrode unit EU2, a third electrode unit EU3, and a fourth electrode unit EU4 as a plurality of electrode units EU. Each of the electrode units EU may include a first electrode 210 and a second electrode 220 containing at least one curved edge, so the first electrode unit EU1, the second electrode unit EU2, the third electrode unit EU3, and the fourth electrode unit EU4 may include the curvature center of the first outer edge OS1 of the first electrode 210. According to one embodiment, in the display device 10, the plurality of electrode units EU provided in each sub-pixel PXn may be configured such that the curvature center of the first outer edge OS1 of their first electrode 210 is located on opposite sides relative to the center of each sub-pixel PXn.

[0095] For example, each sub-pixel PXn may include a first imaginary line (not shown) extending in a first direction DR1 and passing through the center of the sub-pixel PXn, and a second imaginary line (not shown) extending in a second direction DR2 and passing through the center of the sub-pixel PXn. Within each sub-pixel PXn, upper and lower sides relative to the first imaginary line and left and right sides relative to the second imaginary line may be defined. A plurality of electrode units EU may be configured such that the center of curvature of the first outer edge OS1 of the first electrode 210 is located on opposite sides of the first and second imaginary lines. For example, the first electrode unit EU1 may be configured such that the center of curvature of the first outer edge OS1 is located above the first imaginary line and to the left of the second imaginary line. The second electrode unit EU2 may be configured such that the center of curvature of the first outer edge OS1 is located above the first imaginary line and to the right of the second imaginary line; the third electrode unit EU3 may be configured such that the center of curvature of the first outer edge OS1 is located below the first imaginary line and to the right of the second imaginary line; and the fourth electrode unit EU4 may be configured such that the center of curvature of the first outer edge OS1 is located below the first imaginary line and to the left of the second imaginary line.

[0096] Meanwhile, as described above, the center of curvature of the first outer edge OS1 of the first electrode 210 can be located on the side where the first short edge SS1 and the second short edge SS2 are interconnected. That is, the first electrode unit EU1 and the second electrode unit EU2 can be symmetrically arranged with respect to the fourth electrode unit EU4 and the third electrode unit EU3, respectively, based on a first imaginary line extending in the first direction DR1. Furthermore, the first electrode unit EU1 and the fourth electrode unit EU4 can be symmetrically arranged with respect to the second electrode unit EU2 and the third electrode unit EU3, based on a second imaginary line extending in the second direction DR2.

[0097] Furthermore, according to one embodiment, in each of the first electrodes 210 of the first electrode unit EU1, the curvature center of the first outer edge OS1 may be located at the peripheral portion of each sub-pixel PXn, and the first outer edge OS1 may have a shape that protrudes toward the center of each sub-pixel PXn. The curvature center of each of the first outer edges OS1 of the first electrode 210 may be located at the peripheral portion of each sub-pixel PXn in the diagonal direction, and the plurality of first electrodes 210 may be configured such that each of the first outer edges OS1 bends from its curvature center toward the center of the sub-pixel PXn. The plurality of first electrodes 210 may be configured such that the first outer edges OS1 face each other, and the second electrode 220 may be configured such that the second outer edge OS2 is spaced apart from the first outer edge OS1 and faces the first outer edge OS1, thus having a shape surrounding the first outer edge OS1. The display device 10 according to one embodiment may include one or more first electrodes 210 disposed in each sub-pixel PXn, the first outer edges OS1 of the first electrodes 210 facing each other, and at least one second electrode 220 may be disposed between the first outer edges OS1 of the first electrodes 210.

[0098] When each sub-pixel PXn includes an electrode unit EU, and each of the electrode units EU includes a first electrode 210 having a quarter-circular shape, the area occupied by the plurality of first electrodes 210 can have a circular shape depending on the number of first electrodes 210. For example, when... Figure 3 When each sub-pixel PXn shown includes a first electrode unit EU1, a second electrode unit EU2, a third electrode unit EU3, and a fourth electrode unit EU4, the area occupied by the four first electrodes 210 can be the same as the area occupied by a single circular electrode. When multiple electrodes with circular shapes are provided per unit area, the area of ​​the region without electrodes increases, and the ratio of the area occupied by the circular electrode decreases. That is, when each of the electrodes 210 and 220 of each sub-pixel PXn has a circular shape, the area occupied per unit area by the electrodes 210 and 220 is smaller, and the number of light-emitting elements 300 provided per unit area is less. However, when as... Figure 3 When the first electrode 210 of each of the electrode units EU shown has a quarter-circular shape, and the center of curvature is located on the periphery of the sub-pixel PXn rather than at the center of the sub-pixel PXn, the ratio of the area occupied by the electrode per unit area can be increased. That is, the area occupied by the electrodes 210 and 220 per unit area of ​​each sub-pixel PXn is large, and the number of light-emitting elements 300 provided per unit area can be increased. Therefore, in the display device 10, the amount of light emitted per unit area of ​​each sub-pixel PXn can be increased.

[0099] Meanwhile, in the first electrode unit EU1, the second electrode 220 may include an electrode protrusion 220P, and in the second electrode units EU2 to the fourth electrode units EU4, the second electrode 220 may not include the electrode protrusion 220P. However, in the electrode units EU disposed in each sub-pixel PXn, the second electrode 220 may be partially connected and integral. When the second electrode 220 included in one electrode unit EU includes the electrode protrusion 220P, the electrical signal transmitted through the second contact hole CT2 can be transmitted to the second electrode 220 of another electrode unit EU.

[0100] like Figure 3 As shown, when each of the sub-pixels PXn includes multiple electrode units EU, the second electrodes 220 between the electrode units EU can be partially connected to each other. According to one embodiment, in the display device 10, at least some regions of the second electrodes 220 of the electrode units EU in each sub-pixel PXn can be connected to each other and are integral. For example, the second electrode 220 of the first electrode unit EU1 can be partially integral with the second electrodes 220 of the second electrode unit EU2 and the second electrodes 220 of the fourth electrode unit EU4. The second electrode 220 of the third electrode unit EU3 can also be partially integral with the second electrodes 220 of the second electrode unit EU2 and the second electrodes 220 of the fourth electrode unit EU4. That is, at least some of the second electrodes 220 with different curvature centers can be directly connected to each other. Therefore, the first electrodes 210 in each sub-pixel PXn can be spaced apart from each other, and the electrical signal transmitted to the second electrode 220 of the first electrode unit EU1 can be transmitted to the second electrodes 220 of the second electrode units EU2 to the fourth electrode units EU4. However, the invention is not limited thereto, and the second electrodes 220 of the electrode units EU disposed in each sub-pixel PXn can be configured to be spaced apart from each other and not connected to each other. In this case, different electrode units EU can receive electrical signals from the voltage line connected through the second contact hole CT2 through different electrodes or lines.

[0101] A first contact electrode 261 may be disposed on the first electrode 210. In an exemplary embodiment, the first contact electrode 261 may have the same shape as the first electrode 210. For example, the first contact electrode 261 may include two short sides extending in one direction and intersecting each other, like the first electrode 210, and a curved outer side connecting the short sides. As will be described below, the first contact electrode 261 may be formed such that its width, measured in one direction, is greater than the width of the first electrode 210, so as to completely cover the first electrode 210. However, the invention is not limited thereto.

[0102] The second contact electrode 262 may be disposed on the second electrode 220. In an exemplary embodiment, the second contact electrode 262 may have the same shape as the electrode bend 220R of the second electrode 210. For example, the second contact electrode 262 may include two short sides extending in one direction, like the second electrode 220, and a bend connecting the short sides. As described below, the second contact electrode 262 may be formed such that its width, measured in one direction, is greater than the width of the second electrode 220, to cover the two short sides and the two outer sides of the second electrode 210. However, the second contact electrode 262 may not be disposed on the electrode protrusion 220P. In the case where the second electrode 220 includes the first electrode unit EU1 of the electrode protrusion 220P, the second contact electrode 262 may be disposed only on the electrode bend 220R and may not be disposed on the electrode protrusion 220P. On the other hand, in the case where the second electrode 220 does not include each of the second electrode units EU2 to the fourth electrode units EU4 of the electrode protrusion 220P, the second contact electrode 262 may be configured to cover the second electrode 220. Furthermore, similar to the second electrode 220, the second contact electrodes 262 disposed in each sub-pixel PXn can also be partially connected to each other to form a single contact electrode. However, the invention is not limited thereto.

[0103] The first contact electrode 261 and the second contact electrode 262 can both be electrically connected to at least one end of the light-emitting element 300 and the first electrode 210 (or the second electrode 220). As an example, the first contact electrode 261 can be in direct contact with the first electrode 210 and one end of the light-emitting element 300, and the second contact electrode 262 can be in direct contact with the second electrode 220 and the other end of the light-emitting element 300. Electrical signals transmitted to the first electrode 210 and the second electrode 220 can be transmitted to the light-emitting element 300 through the first contact electrode 261 and the second contact electrode 262, respectively. The light-emitting element 300 can receive electrical signals and emit light within a specific wavelength range.

[0104] According to one embodiment, a first separation distance W1, which is the separation distance between the first outer edge OS1 of the first electrode 210 and the second outer edge OS2 of the second electrode 220, can be greater than a second separation distance W2, which is the separation distance between the first contact electrode 261 and the second contact electrode 262. The light-emitting element 300 can be configured such that its two ends are respectively placed on the first electrode 210 and the second electrode 220. However, in at least some of the light-emitting elements 300, one end of each end can be disposed between the first electrode 210 and the second electrode 220. The contact electrodes 261 and 262 are configured such that the second separation distance W2 between them is less than the first separation distance W1 between the electrodes 210 and 220, thus allowing them to contact the light-emitting element 300 disposed between the electrodes 210 and 220. Specifically, since the second separation distance W2 is smaller than the first separation distance W1 between electrodes 210 and 220, even if one end of the light-emitting element 300 is not placed on electrodes 210 and 220 but is disposed between electrodes 210 and 220, the contact electrodes 261 and 262 can still contact both ends of the light-emitting element 300. However, the present invention is not limited thereto.

[0105] The outer embankment 450 can be located at the boundary between adjacent sub-pixels in sub-pixel PXn. The outer embankment 450 can be configured to extend at least in the second direction DR2 and surround the inner embankments 410 and 420 (see...). Figure 5 The outer dam 450 includes some of the electrodes 210 and 220, and the area where the light-emitting element 300 is disposed between the inner dams 410 and 420 and between the electrodes 210 and 220. Furthermore, the outer dam 450 may also include a portion extending in the first direction DR1, and may form a grid pattern on the entire surface of the display area DPA. However, the invention is not limited thereto, and in some cases, the outer dam 450 may be omitted.

[0106] The stacked structure of the display device 10 will be described in further detail below with reference to other accompanying drawings.

[0107] Figure 5 It is along Figure 3 A sectional view taken by line I-I'.

[0108] although Figure 5 Only shown Figure 3 A partial cross-section, but Figure 5 The same description can be applied to other pixels PX or subpixels PXn. Figure 5 It shows the passage set in Figure 3 A cross-section of one end and the other end of the light-emitting element 300 in the first sub-pixel PX1.

[0109] Specifically, refer to Figure 5The display device 10 may include a circuit element layer and a display element layer disposed on a first substrate 101. A semiconductor layer, a plurality of conductive layers, and a plurality of insulating layers are disposed on the first substrate 101, each of which may constitute a circuit element layer and a display element layer. The plurality of conductive layers may include a first gate conductive layer, a second gate conductive layer, a first data conductive layer, and a second data conductive layer disposed below the first planarization layer 109 to form the circuit element layer, and electrodes 210 and 220 and a contact electrode 260 disposed on the first planarization layer 109 to form the display element layer. The plurality of insulating layers may include a buffer layer 102, a first gate insulating layer 103, a first protective layer 105, a first interlayer insulating layer 107, a second interlayer insulating layer 108, a first planarization layer 109, a first insulating layer 510, a second insulating layer 520, and a third insulating layer 550, etc.

[0110] The circuit element layer may include circuit elements and multiple lines for driving the light-emitting element 300 (such as driving transistor DT, switching transistor ST, first conductive pattern CDP, multiple alignment lines AL1 and multiple voltage lines VL1 and VL2). The display element layer may include the light-emitting element 300 and includes a first electrode 210, a second electrode 220, a first contact electrode 261 and a second contact electrode 262, etc.

[0111] The first substrate 101 may be an insulating substrate. The first substrate 101 may be made of an insulating material such as glass, quartz, or polymer resin. In addition, the first substrate 101 may be a rigid substrate, but it may also be a flexible substrate that is bendable, foldable, or rollable.

[0112] Light blocking layers BML1 and BML2 may be disposed on the first substrate 101. Light blocking layers BML1 and BML2 may include a first light blocking layer BML1 and a second light blocking layer BML2. The first light blocking layer BML1 and the second light blocking layer BML2 are configured to be stacked at least, respectively, with the first active material layer DT_ACT of the driving transistor DT and the second active material layer ST_ACT of the switching transistor ST. Light blocking layers BML1 and BML2 may include a light blocking material to prevent light from incident on the first active material layer DT_ACT and the second active material layer ST_ACT. As an example, the first light blocking layer BML1 and the second light blocking layer BML2 may be made of an opaque metallic material that blocks light transmission. However, the invention is not limited thereto, and in some cases, light blocking layers BML1 and BML2 may be omitted. Although not shown in the figures, the first light blocking layer BML1 may be electrically connected to the first source / drain electrode DT_SD1 of the driving transistor DT, which will be described below, and the second light blocking layer BML2 may be electrically connected to the first source / drain electrode ST_SD1 of the switching transistor ST.

[0113] The buffer layer 102 can be completely disposed on the first substrate 101 on which the light-blocking layers BML1 and BML2 are formed. The buffer layer 102 can be formed on the first substrate 101 to protect the transistors DT and ST of the pixel PX from moisture penetrating through the moisture-sensitive first substrate 101, and can perform surface planarization. The buffer layer 102 can be formed from a single inorganic layer, or from multiple inorganic layers stacked alternately or in multiple layers. For example, the buffer layer 102 can be formed to include silicon oxide (SiO2). x Silicon nitride (SiN) x ) and silicon oxynitride (SiO) x N y Multiple layers of inorganic layers, at least one of which are alternately stacked.

[0114] A semiconductor layer is disposed on the buffer layer 102. The semiconductor layer may include a first active material layer DT_ACT for driving transistor DT and a second active material layer ST_ACT for switching transistor ST. The first active material layer DT_ACT and the second active material layer ST_ACT may be configured to be stacked with portions of the gate electrode DT_G and ST_G of the first gate conductive layer described below.

[0115] In an exemplary embodiment, the semiconductor layer may include polycrystalline silicon, monocrystalline silicon, and oxide semiconductors, etc. Polycrystalline silicon can be formed by crystallizing amorphous silicon. Examples of crystallization methods may include rapid thermal annealing (RTA), solid-state crystallization (SPC), excimer laser annealing (ELA), metal-induced lateral crystallization (MILC), and sequential lateral curing (SLS), etc., but the present invention is not limited thereto. When the semiconductor layer includes polycrystalline silicon, the first active material layer DT_ACT may include a first doped region DT_ACTa, a second doped region DT_ACTb, and a first channel region DT_ACTc. The first channel region DT_ACTc may be disposed between the first doped region DT_ACTa and the second doped region DT_ACTb. The second active material layer ST_ACT may include a third doped region ST_ACTa, a fourth doped region ST_ACTb, and a second channel region ST_ACTc. The second channel region ST_ACTc may be disposed between the third doped region ST_ACTa and the fourth doped region ST_ACTb. The first doped region DT_ACTa, the second doped region DT_ACTb, the third doped region ST_ACTa, and the fourth doped region ST_ACTb can be regions in which a portion of each of the first active material layer DT_ACT and the second active material layer ST_ACT is doped with impurities, and can be the source / drain regions of the first active material layer DT_ACT and the second active material layer ST_ACT.

[0116] In an exemplary embodiment, the first active material layer DT_ACT and the second active material layer ST_ACT may include an oxide semiconductor. In this case, the doped regions of each of the first active material layer DT_ACT and the second active material layer ST_ACT may be regions that have become conductive. The oxide semiconductor may be an oxide semiconductor including indium (In). In some embodiments, the oxide semiconductor may be indium tin oxide (ITO), indium zinc oxide (IZO), indium gallium oxide (IGO), indium zinc tin oxide (IZTO), indium gallium zinc oxide (IGZO), indium gallium tin oxide (IGTO), and indium gallium zinc tin oxide (IGZTO), etc. However, the present invention is not limited thereto.

[0117] A first gate insulating layer 103 is disposed on the semiconductor layer and the buffer layer 102. The first gate insulating layer 103 can be used as the gate insulating film for the driving transistor DT and the switching transistor ST. The first gate insulating layer 103 can be formed to include materials such as silicon oxide (SiO2). x Silicon nitride (SiN) x ) and silicon oxynitride (SiO) x N y It can be a single inorganic layer of inorganic material, or it can be formed in a structure in which inorganic layers are stacked alternately or in multiple stacks.

[0118] A first gate conductive layer is disposed on a first gate insulating layer 103. The first gate conductive layer may include a first gate electrode DT_G of a driving transistor DT and a second gate electrode ST_G of a switching transistor ST. The first gate electrode DT_G is configured to be superimposed on at least a portion of a first active material layer DT_ACT, and the second gate electrode ST_G is configured to be superimposed on at least a portion of a second active material layer ST_ACT. For example, the first gate electrode DT_G may be configured to be superimposed on a first channel region DT_ACTc of the first active material layer DT_ACT in the thickness direction, and the second gate electrode ST_G may be configured to be superimposed on a second channel region ST_ACTc of the second active material layer ST_ACT in the thickness direction.

[0119] The first gate conductive layer can be formed as a single layer or multiple layers, which are made of one of molybdenum (Mo), aluminum (Al), chromium (Cr), gold (Au), titanium (Ti), nickel (Ni), neodymium (Nd), and copper (Cu) or alloys thereof. However, the present invention is not limited thereto.

[0120] A first protective layer 105 is disposed on the first gate conductive layer. The first protective layer 105 can be configured to cover the first gate conductive layer and can perform the function of protecting the first gate conductive layer. The first protective layer 105 can be formed to include materials such as silicon oxide (SiO2). xSilicon nitride (SiN) x ) and silicon oxynitride (SiO) x N y It can be a single inorganic layer of inorganic material, or it can be formed in a structure in which inorganic layers are stacked alternately or in multiple stacks.

[0121] A second gate conductive layer is disposed on the first protective layer 105. The second gate conductive layer may include a first capacitor electrode CSE1 of a storage capacitor, the first capacitor electrode CSE1 being configured such that at least a portion thereof overlaps with the first gate electrode DT_G in the thickness direction. The first capacitor electrode CSE1 and the first gate electrode DT_G may overlap each other in the thickness direction, and the first protective layer 105 is disposed between the first capacitor electrode CSE1 and the first gate electrode DT_G, and the storage capacitor may be formed by the first capacitor electrode CSE1, the first gate electrode DT_G, and the first protective layer 105. The second gate conductive layer may be formed as a single layer or multiple layers, the single layer or multiple layers being made of one or an alloy of molybdenum (Mo), aluminum (Al), chromium (Cr), gold (Au), titanium (Ti), nickel (Ni), neodymium (Nd), and copper (Cu). However, the present invention is not limited thereto.

[0122] A first interlayer insulating layer 107 is disposed on the second gate conductive layer. The first interlayer insulating layer 107 can serve as an insulating film between the second gate conductive layer and other layers disposed thereon. The first interlayer insulating layer 107 can be formed to include materials such as silicon oxide (SiO2). x Silicon nitride (SiN) x ) and silicon oxynitride (SiO) x N y It can be a single inorganic layer of inorganic material, or it can be formed in a structure in which inorganic layers are stacked alternately or in multiple stacks.

[0123] A first data conductive layer is disposed on the first interlayer insulating layer 107. The first data conductive layer may include a first source / drain electrode DT_SD1 and a second source / drain electrode DT_SD2 of the driving transistor DT, a first source / drain electrode ST_SD1 and a second source / drain electrode ST_SD2 of the switching transistor ST, and a second voltage line VL2.

[0124] The first source / drain electrode DT_SD1 and the second source / drain electrode DT_SD2 of the driving transistor DT can contact the first doped region DT_ACTa and the second doped region DT_ACTb of the first active material layer DT_ACT through contact holes passing through the first interlayer insulating layer 107, the first protective layer 105, and the first gate insulating layer 103, respectively. The first source / drain electrode ST_SD1 and the second source / drain electrode ST_SD2 of the switching transistor ST can contact the third doped region ST_ACTa and the fourth doped region ST_ACTb of the second active material layer ST_ACT, respectively, through contact holes passing through the first interlayer insulating layer 107, the first protective layer 105, and the first gate insulating layer 103, respectively. In addition, the first source / drain electrode DT_SD1 of the driving transistor DT and the first source / drain electrode ST_SD1 of the switching transistor ST can be electrically connected to the first photoblocking layer BML1 and the second photoblocking layer BML2 through other contact holes, respectively. Meanwhile, in the first source / drain electrodes DT_SD1 and ST_SD1 and the second source / drain electrodes DT_SD2 and ST_SD2 of the driving transistor DT and the switching transistor ST, when one electrode is a source electrode, the other electrode can be a drain electrode. However, the present invention is not limited thereto, and in the first source / drain electrodes DT_SD1 and ST_SD1 and the second source / drain electrodes DT_SD2 and ST_SD2, when one electrode is a drain electrode, the other electrode can be a source electrode.

[0125] The second voltage line VL2 can be connected to one of the source / drain electrodes DT_SD1 and DT_SD2 of the driving transistor DT. For example, the second voltage line VL2 can be electrically connected to the second source / drain electrode DT_SD2 of the driving transistor DT. The high potential voltage (second power supply voltage VDD) supplied to the driving transistor DT can be applied to the second voltage line VL2. As described below, the driving transistor DT can be electrically connected to the second electrode 220, and the second power supply voltage VDD applied through the second voltage line VL2 can be transmitted to the second electrode 220 through the driving transistor DT.

[0126] The first data conductive layer can be formed as a single layer or multiple layers, which are made of one of molybdenum (Mo), aluminum (Al), chromium (Cr), gold (Au), titanium (Ti), nickel (Ni), neodymium (Nd), and copper (Cu) or alloys thereof. However, the present invention is not limited thereto.

[0127] The second interlayer insulating layer 108 can be disposed on the first data conductive layer. The second interlayer insulating layer 108 can be completely disposed on the first interlayer insulating layer 107, simultaneously covering the first data conductive layer and serving to protect it. The second interlayer insulating layer 108 can be formed comprising, for example, silicon oxide (SiO2). x Silicon nitride (SiN)x ) and silicon oxynitride (SiO) x N y It can be a single inorganic layer of inorganic material, or it can be formed in a structure in which inorganic layers are stacked alternately or in multiple stacks.

[0128] A second data conductive layer is disposed on the second interlayer insulating layer 108. The second data conductive layer may include a first voltage line VL1, a first alignment line AL1, and a first conductive pattern CDP. A low potential voltage (first power supply voltage VSS) supplied to the first electrode 210 may be applied to the first voltage line VL1.

[0129] During the manufacturing process of the display device 10, an alignment signal required to align the light-emitting element 300 can be applied to a first alignment line AL1, and the first alignment line AL1 can be electrically connected to the second electrode 220 to transmit the alignment signal to the second electrode 220. The alignment signal can also be applied to a first voltage line VL1 during the manufacturing process of the display device 10, and the first voltage line VL1 can transmit the alignment signal to the first electrode 210. However, the first alignment line AL1 can be patterned in a subsequent process after the light-emitting element 300 is aligned, and the electrical signal may not be applied to the first alignment line AL1 when the display device 10 is driven. As described below, the first alignment line AL1 can be electrically connected to the second electrode 220 through a third contact hole CT3 passing through the second inner dam 420 and the first planarization layer 109.

[0130] The first conductive pattern CDP can be electrically connected to the first source / drain electrode DT_SD1 of the driving transistor DT through contact holes formed in the second interlayer insulating layer 108. The first conductive pattern CDP can also be electrically connected to the second electrode 220, which will be described below, and the driving transistor DT can transmit the second power supply voltage VDD applied from the second voltage line VL2 to the second electrode 220 through the first conductive pattern CDP.

[0131] Meanwhile, in the accompanying drawings, the second data conductive layer is shown to include a first alignment line AL1, but the invention is not limited thereto. Depending on the number of electrodes 210 and 220 provided in each sub-pixel PXn, a greater number of first alignment lines AL1 can be provided. For example, when the number of second electrodes 220 provided in each sub-pixel PXn is large, a greater number of first alignment lines AL1 can be provided. However, the invention is not limited thereto; when each sub-pixel PXn also includes other electrodes, other alignment lines besides the first alignment line AL1 can also be provided in the second data conductive layer.

[0132] The second conductive layer can be formed as a single layer or multiple layers, which are made of one of molybdenum (Mo), aluminum (Al), chromium (Cr), gold (Au), titanium (Ti), nickel (Ni), neodymium (Nd), and copper (Cu) or alloys thereof. However, the invention is not limited thereto.

[0133] A first planarization layer 109 is disposed on the second data conductive layer. The first planarization layer 109 may include an organic insulating material and perform a surface planarization function.

[0134] Inner embankments 410 and 420, multiple electrodes 210 and 220, outer embankment 450, multiple contact electrodes 260, and light-emitting element 300 are disposed on the first planarization layer 109. In addition, multiple insulating layers 510, 520, and 550 may be further disposed on the first planarization layer 109.

[0135] Inner embankments 410 and 420 are directly disposed on the first planarization layer 109. Inner embankments 410 and 420 may include a first inner embankment 410 and a second inner embankment 420 disposed adjacent to the central portion of each pixel PX or sub-pixel PXn.

[0136] In the plan view, the first inner bank 410 and the second inner bank 420 may each have a shape similar to that of the first electrode 210 and the second electrode 220. For example, similar to the first electrode 210, the first inner bank 410 may include two short sides that intersect each other and connect one side to the other, and a curved outer side connecting the other side of the two short sides. Similar to the electrode curved portion 220R of the second electrode 220, the second inner bank 420 may include two short sides that extend in a direction that intersects each other, and two curved outer sides that connect the two sides of each of the two short sides. That is, the first inner bank 410 may have a quarter-circle shape in the plan view, and the second inner bank 420 may have a curved shape so as to be spaced apart from and facing the curved outer side of the first inner bank 410. The first inner bank 410 and the second inner bank 420 may also be configured to be spaced apart from each other, and the curved outer side of the first inner bank 410 may be spaced apart from and facing one of the curved outer sides of the second inner bank 420.

[0137] The first inner dam 410 and the second inner dam 420 can be disposed in each sub-pixel PXn to form a pattern on the entire surface of the display device 10. By setting the inner dams 410 and 420 to be spaced apart from each other and facing each other, an area in which the light-emitting element 300 is disposed can be formed between them. In the accompanying drawings, only one first inner dam 410 and one second inner dam 420 are shown, but the invention is not limited thereto. The number of first inner dams 410 and second inner dams 420 disposed in each sub-pixel PXn can vary depending on the number of electrodes 210 and 220.

[0138] Furthermore, each of the first inner dam 410 and the second inner dam 420 may have a structure in which at least a portion of the first inner dam 410 and the second inner dam 420 protrudes relative to the upper surface of the first planarization layer 109. The protruding portion of each of the first inner dam 410 and the second inner dam 420 may have an inclined side surface, and light emitted from the light-emitting element 300 disposed between the first inner dam 410 and the second inner dam 420 may travel toward the inclined side surfaces of the inner dams 410 and 420. As will be described below, when the electrodes 210 and 220 disposed on the inner dams 410 and 420 respectively comprise a material with high reflectivity, light emitted from the light-emitting element 300 may be reflected from the side surfaces of the inner dams 410 and 420 to be emitted in an upward direction relative to the first substrate 101. That is, the inner dams 410 and 420 may provide an area in which the light-emitting element 300 is disposed, and may simultaneously serve as reflective partitions that reflect light emitted from the light-emitting element 300 upward. In an exemplary embodiment, the inner embankments 410 and 420 may include an organic insulating material such as polyimide (PI), but the invention is not limited thereto.

[0139] Multiple electrodes 210 and 220 are disposed on the inner embankments 410 and 420 and the first planarization layer 109. Multiple first electrodes 210 may be disposed on the first inner embankment 410, and second electrodes 220 may be disposed on the second inner embankment 420.

[0140] The first electrode 210 can be configured to cover the first inner dam 410. For example, the first electrode 210 can be formed with the same shape as the first inner dam 410 but with a larger width, and thus can be configured to cover the outer surface of the first inner dam 410. Therefore, a portion of the lower surface of the first electrode 210 can be disposed on the first inner dam 410, and another portion can be disposed on the first planarization layer 109. A first contact hole CT1 can be formed in a portion of the first electrode 210 disposed on the first planarization layer 109. The first contact hole CT1 can pass through the first planarization layer 109 to expose a portion of the upper surface of the first voltage line VL1. The first electrode 210 can contact the first voltage line VL1 through the first contact hole CT1, and the first electrode 210 can be electrically connected to the first voltage line VL1.

[0141] The second electrode 220 can also be configured to cover the second inner dam 420. For example, the second electrode 220 can be formed with the same shape as the second inner dam 420 but with a larger width, and thus can be configured to cover the outer surface of the second inner dam 420. Therefore, a portion of the lower surface of the second electrode 220 can be disposed on the second inner dam 420, and another portion can be disposed on the first planarization layer 109. Furthermore, the second electrode 220 may also include an electrode protrusion 220P directly disposed on the first planarization layer 109. A second contact hole CT2 can be formed in the electrode protrusion 220P of the second electrode 220. The second contact hole CT2 can penetrate the first planarization layer 109 to expose a portion of the upper surface of the first conductive pattern CDP. The second electrode 220 can contact the first conductive pattern CDP through the second contact hole CT2, and the second electrode 220 can be electrically connected to the first source / drain electrode DT_SD1 of the driving transistor DT through the first conductive pattern CDP.

[0142] Furthermore, a third contact hole CT3 may be formed in a portion of the second electrode 220 disposed on the second inner embankment 420. The third contact hole CT3 may penetrate the second inner embankment 420 and the first planarization layer 109 to expose a portion of the upper surface of the first alignment line AL1, and the second electrode 220 may be in direct contact with the first alignment line AL1. A description thereof will now be provided with reference to other accompanying drawings.

[0143] Multiple electrodes 210 and 220 can be electrically connected to the light-emitting element 300 and can receive a predetermined voltage to cause the light-emitting element 300 to emit light. For example, the multiple electrodes 210 and 220 can be electrically connected to the light-emitting element 300 via a contact electrode 260 described below, and an electrical signal applied to the electrodes 210 and 220 can be transmitted to the light-emitting element 300 via the contact electrode 260.

[0144] In an exemplary embodiment, one of the first electrode 210 and the second electrode 220 is the anode of the light-emitting element 300, and the other of the first electrode 210 and the second electrode 220 can be the cathode of the light-emitting element 300. For example, the first electrode 210 can be the cathode and the second electrode 220 can be the anode, but the invention is not limited thereto, and the opposite of the description above is possible.

[0145] Furthermore, each of electrodes 210 and 220 can be used to form an electric field in the sub-pixel PXn, thereby aligning the light-emitting element 300. The light-emitting element 300 can be disposed between the first electrode 210 and the second electrode 220 via a process of forming an electric field between the first electrode 210 and the second electrode 220 by applying an alignment signal to the first electrode 210 and the second electrode 220. For example, the light-emitting element 300 can be sprayed onto the first electrode 210 and the second electrode 220 in a dispersed state by an inkjet process, and can be aligned between the first electrode 210 and the second electrode 220 by applying a dielectric force to the light-emitting element 300 by applying an alignment signal between the first electrode 210 and the second electrode 220.

[0146] Each of electrodes 210 and 220 may include a transparent conductive material. As an example, each of electrodes 210 and 220 may include materials such as indium tin oxide (ITO), indium zinc oxide (IZO), and indium tin zinc oxide (ITZO), but the invention is not limited thereto. In some embodiments, each of electrodes 210 and 220 may include a conductive material with high reflectivity. For example, each of electrodes 210 and 220 may include a metal such as silver (Ag), copper (Cu), or aluminum (Al) as a material with high reflectivity. In this case, for each sub-pixel PXn, each of electrodes 210 and 220 can cause light emitted from the light-emitting element 300 and traveling to the side surfaces of the first inner dam 410 and the second inner dam 420 to be reflected in an upward direction.

[0147] The invention is not limited thereto, and each of electrodes 210 and 220 may be formed in a structure in which one or more layers of transparent conductive material and a metal layer with high reflectivity are stacked, or formed as a single layer including transparent conductive material and metal layer. In an exemplary embodiment, each of electrodes 210 and 220 may have a stacked structure of ITO / Ag / ITO / IZO, or may be an alloy including Al, Ni and lanthanum (La).

[0148] A first insulating layer 510 is disposed on the first planarization layer 109, the first electrode 210, and the second electrode 220. In addition to the regions between the spaced-apart electrodes 210 and 220 or between the inner embankments 410 and 420, the first insulating layer 510 may also be disposed on the sides of the inner embankments 410 and 420 opposite to the regions between the inner embankments 410 and 420. Furthermore, the first insulating layer 510 is configured to partially cover the first electrode 210 and the second electrode 220. For example, the first insulating layer 510 may be completely disposed on the first planarization layer 109 on which the first electrode 210 and the second electrode 220 are formed, and may be configured to expose a portion of the upper surface of each of the first electrode 210 and the second electrode 220. Openings (not shown) that partially expose the first electrode 210 and the second electrode 220 may be formed in the first insulating layer 510, and the first insulating layer 510 may be configured to cover only one side and the other side of each of the first electrode 210 and the second electrode 220. Some of the portions of the first electrode 210 and the second electrode 220 disposed on the inner embankments 410 and 420 may be partially exposed due to the openings.

[0149] The first insulating layer 510 protects the first electrode 210 and the second electrode 220, and simultaneously insulates the first electrode 210 from the second electrode 220. Furthermore, it prevents the light-emitting element 300 disposed on the first insulating layer 510 from being damaged due to direct contact with other components. However, the shape and structure of the first insulating layer 510 are not limited thereto.

[0150] In an exemplary embodiment, a step difference may be formed on a portion of the upper surface of the first insulating layer 510 between the first electrode 210 and the second electrode 220. In some embodiments, the first insulating layer 510 may comprise an inorganic insulating material, and due to the step difference formed by the electrodes 210 and 220 disposed below the first insulating layer 510, a portion of the upper surface of the first insulating layer 510, which is configured to partially cover the first electrode 210 and the second electrode 220, may be stepped. Therefore, the light-emitting element 300 disposed on the first insulating layer 510 between the first electrode 210 and the second electrode 220 may form an empty space between the light-emitting element 300 and the upper surface of the second insulating layer 510. The empty space may be filled with the material forming the second insulating layer 520, which will be described below.

[0151] The outer dam 450 can be disposed on the first insulating layer 510. As described above, the outer dam 450 can be disposed at the boundary between adjacent sub-pixels in the sub-pixel PXn. The outer dam 450 can be configured to surround the inner dams 410 and 420 and the electrodes 210 and 220, and the region in which the light-emitting element 300 is disposed between the inner dams 410 and 420 and between the electrodes 210 and 220.

[0152] According to one embodiment, the height of the outer dike 450 may be greater than the height of each of the inner dikes 410 and 420. Unlike the inner dikes 410 and 420, the outer dike 450 can separate adjacent sub-pixels PXn and, simultaneously, as will be described below, prevent ink spillage into adjacent sub-pixels PXn during the inkjet printing process for setting the light-emitting elements 300 in the manufacturing process of the display device 10. That is, the outer dike 450 can separate the ink in different sub-pixels PXn, where different light-emitting elements 300 are dispersed, to prevent the ink from mixing with each other.

[0153] The light-emitting element 300 can be disposed in the region formed between the first electrode 210 and the second electrode 220 or between the first inner dam 410 and the second inner dam 420. For example, the light-emitting element 300 can be disposed on the first insulating layer 510 disposed between the inner dams 410 and 420. The light-emitting element 300 can be configured such that a portion of its region is superimposed on each of the electrodes 210 and 220 in the thickness direction. One end of the light-emitting element 300 can be superimposed on and placed on the first electrode 210 in the thickness direction, and the other end can be superimposed on and placed on the second electrode 220 in the thickness direction. However, the invention is not limited thereto, and although not shown in the figures, at least some of the light-emitting elements 300 disposed in each sub-pixel PXn can be disposed in regions other than the region formed between the inner dams 410 and 420, for example, the region between the inner dams 410 and 420 and the outer dam 450.

[0154] The light-emitting element 300 may include multiple layers disposed in a direction parallel to the upper surface of the first substrate 101 or the upper surface of the first planarization layer 109. According to one embodiment, the light-emitting element 300 of the display device 10 may have a shape extending in one direction and a structure in which multiple semiconductor layers are sequentially disposed in said direction. The light-emitting element 300 may be configured such that the light-emitting element 300 is parallel to the first planarization layer 109 along its extending direction, and the multiple semiconductor layers included in the light-emitting element 300 may be sequentially disposed in a direction parallel to the upper surface of the first planarization layer 109. However, the invention is not limited thereto. In some cases, when the light-emitting element 300 has different structures, the multiple layers may be disposed in a direction perpendicular to the first planarization layer 109.

[0155] The second insulating layer 520 may be partially disposed on the light-emitting element 300 disposed between the first electrode 210 and the second electrode 220. For example, the second insulating layer 520 may be configured to partially surround the outer surface of the light-emitting element 300, thus protecting the light-emitting element 300 and simultaneously fixing the light-emitting element 300 during the manufacturing process of the display device 10. In a plan view, a portion of the second insulating layer 520 disposed on the light-emitting element 300 may have a shape that bends in the same direction as the outer edges OS1, OS2, and OS3 between the first electrode 210 and the second electrode 220. As an example, the second insulating layer 520 may form a curved pattern such as an arc in each sub-pixel PXn.

[0156] A second insulating layer 520 may be disposed on the light-emitting element 300, and may expose one end and the other end of the light-emitting element 300. The exposed end of the light-emitting element 300 may contact the contact electrode 260, which will be described below. The second insulating layer 520 can be formed in this shape by a patterning process using the material used to form the second insulating layer 520 through a typical masking process. The width of the mask used to form the second insulating layer 520 is smaller than the length of the light-emitting element 300, and the material used to form the second insulating layer 520 may be patterned to expose both ends of the light-emitting element 300. However, the invention is not limited thereto.

[0157] Furthermore, in an exemplary embodiment, a portion of the material of the second insulating layer 520 may be disposed between the lower surface of the light-emitting element 300 and the first insulating layer 510. The second insulating layer 520 may be formed to fill the space between the first insulating layer 510 and the light-emitting element 300 formed during the manufacturing process of the display device 10. Therefore, the second insulating layer 520 may be formed to surround the outer surface of the light-emitting element 300. However, the present invention is not limited thereto.

[0158] Multiple contact electrodes 260 may be disposed on the second insulating layer 520. As described above, the contact electrodes 260 may include a first contact electrode 261 and a second contact electrode 262. The first contact electrode 261 and the second contact electrode 262 may contact one end and the other end of the light-emitting element 300, respectively, and may also contact the first electrode 210 and the second electrode 220, respectively. In some embodiments, the upper surface of each of the first electrode 210 and the second electrode 220 may be partially exposed, and the first contact electrode 261 and the second contact electrode 262 may contact the exposed upper surfaces of the first electrode 210 and the second electrode 220, respectively. For example, the first contact electrode 261 may contact a portion of the first electrode 210 located on the first inner embankment 410, and the second contact electrode 262 may contact a portion of the second electrode 220 located on the second inner embankment 420. However, the present invention is not limited thereto, and in some cases, the widths of the first contact electrode 261 and the second contact electrode 262 may be formed to be smaller than the widths of the first electrode 210 and the second electrode 220, respectively, and the first contact electrode 261 and the second contact electrode 262 may be configured to cover only the exposed portions of the upper surfaces of the first electrode 210 and the second electrode 220, respectively. Furthermore, at least a portion of each of the first contact electrode 261 and the second contact electrode 262 is disposed on the first insulating layer 510.

[0159] According to one embodiment, the light-emitting element 300 has a semiconductor layer exposed on two end surfaces of the light-emitting element 300 in the extending direction, and the first contact electrode 261 and the second contact electrode 262 can contact the light-emitting element 300 on the end surfaces of the semiconductor layer that are exposed. However, the invention is not limited thereto. In some cases, the side surfaces at both ends of the light-emitting element 300 can be partially exposed. During the manufacturing process of the display device 10, the insulating film 380 surrounding the outer surface of the semiconductor layer of the light-emitting element 300 can be partially removed (see [link to manufacturing process]) during the process of forming the second insulating layer 520 covering the outer surface of the light-emitting element 300. Figure 9 The exposed side surface of the light-emitting element 300 can contact the first contact electrode 261 and the second contact electrode 262. One end of the light-emitting element 300 can be electrically connected to the first electrode 210 through the first contact electrode 261, and the other end of the light-emitting element 300 can be electrically connected to the second electrode 220 through the second contact electrode 262.

[0160] Furthermore, at least a portion of each of the first contact electrode 261 and the second contact electrode 262 is disposed on the second insulating layer 520. The first contact electrode 261 and the second contact electrode 262 are spaced apart from each other on the second insulating layer 520, and the spaced-apart and facing side surfaces of the first contact electrode 261 and the second contact electrode 262 may be disposed on the second insulating layer 520. The second insulating layer 520 may comprise an organic insulating material, and the first contact electrode 261 and the second contact electrode 262 may be formed together in the same process. The first contact electrode 261 and the second contact electrode 262 may be electrically insulated from each other and not in direct contact with each other. However, the invention is not limited thereto, and an insulating layer may be further disposed between the first contact electrode 261 and the second contact electrode 262. The insulating layer may prevent the first contact electrode 261 and the second contact electrode 262 from directly contacting each other.

[0161] Contact electrode 260 may include a conductive material. For example, contact electrode 260 may include ITO, IZO, ITZO, or aluminum (Al). As an example, contact electrode 260 may include a transparent conductive material, and light emitted from light-emitting element 300 may pass through contact electrode 260 and travel toward electrodes 210 and 220. Each of electrodes 210 and 220 may include a material with high reflectivity, and electrodes 210 and 220 disposed on the inclined side surfaces of inner embankments 410 and 420 may cause incident light to be reflected in an upward direction relative to the first substrate 101. However, the invention is not limited thereto.

[0162] The third insulating layer 550 can be completely disposed on the first substrate 101. The third insulating layer 550 can be used to protect the components disposed on the first substrate 101 from the influence of the external environment.

[0163] Each of the first insulating layer 510, the second insulating layer 520, and the third insulating layer 550 described above may comprise an inorganic insulating material or an organic insulating material. In an exemplary embodiment, the first insulating layer 510, the second insulating layer 520, and the third insulating layer 550 may all comprise materials such as silicon oxide (SiO2). x Silicon nitride (SiN) x ), silicon oxynitride (SiO) x N y ), aluminum oxide (Al) x O y ) or aluminum nitride (Al x N yInorganic insulating materials such as acrylic resin, epoxy resin, phenolic resin, polyamide resin, PI 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 may be used. However, the present invention is not limited thereto.

[0164] Meanwhile, as described above, the first electrode 210 and the second electrode 220 disposed in each sub-pixel PXn can be used to align the light-emitting element 300 during the manufacturing process of the display device 10. As an example, the first electrode 210 and the second electrode 220 can be electrically connected to the first voltage line VL1 and the first alignment line AL1 disposed in the second data conductive layer, and the alignment signal can be transmitted through the first voltage line VL1 and the first alignment line AL1.

[0165] Figure 6 This is a schematic plan view showing an electrode unit and alignment lines according to one embodiment. Figure 7 It is along Figure 6 The sectional view taken from line II-II'.

[0166] In addition to the first electrode 210, the second electrode 220, and the outer embankment 450 set in a sub-pixel PXn Figure 6 The first voltage line VL1 and the first alignment line AL1 of the second data conductive layer, as well as the second voltage line VL2 of the first data conductive layer, are also shown. Figure 6 For ease of description, only some electrodes and wires are shown in the image. Figure 7 It shows the passage formed in Figure 6 The cross-sections of contact holes CT1, CT2, and CT3 in the first electrode 210 and the second electrode 220 are shown. The first voltage line VL1, the second voltage line VL2, and the first alignment line AL1 will be described in detail below.

[0167] Reference Figure 6 and Figure 7Multiple first voltage lines VL1 (e.g., two first voltage lines VL1) can be provided in each sub-pixel PXn. The first voltage lines VL1 can be configured to overlap with the first electrode 210 provided in each sub-pixel PXn in the thickness direction and can contact the first electrode 210 through the first contact hole CT1. As an example, the first voltage lines VL1 can be provided on the left and right sides respectively, the left and right sides being opposite sides relative to the center of the sub-pixel PXn. The first voltage line VL1 provided on the left side of the sub-pixel PXn can be electrically connected to the first electrode 210 of the first electrode unit EU1 and the fourth electrode unit EU4, and the first voltage line VL1 provided on the right side of the sub-pixel PXn can be electrically connected to the first electrode 210 of the second electrode unit EU2 and the third electrode unit EU3. However, the invention is not limited thereto. The number of first voltage lines VL1 can vary depending on the number of first electrodes 210 provided in each sub-pixel PXn.

[0168] The first voltage line VL1 can be configured to extend on the second direction DR2, and can also be configured in other sub-pixels PXn beyond the boundary of the sub-pixel PXn adjacent to the sub-pixel PXn on the second direction DR2.

[0169] The second voltage line VL2 can also be provided in each sub-pixel PXn to extend in the second direction DR2. However, unlike the first voltage line VL1, a second voltage line VL2 can be provided in each sub-pixel PXn, but the invention is not limited thereto. The second voltage line VL2 can be provided at a position adjacent to the electrode protrusion 220P of the second electrode 220. The second voltage line VL2 can be electrically connected to the source / drain electrodes of the driving transistor DT, and as described above, the electrode protrusion 220P of the second electrode 220 can be electrically connected to the driving transistor DT through the first conductive pattern CDP connected via the second contact hole CT2.

[0170] Similar to the first voltage line VL1, multiple first alignment lines AL1 (e.g., two first alignment lines AL1) can be provided in each sub-pixel PXn. The first alignment lines AL1 can be configured to overlap with the second electrode 220 provided in each sub-pixel PXn in the thickness direction and can contact the second electrode 220 through the third contact hole CT3. As an example, the first alignment lines AL1 can be provided on the left and right sides respectively, the left and right sides being opposite sides relative to the center of the sub-pixel PXn. The first alignment line AL1 provided on the left side of the sub-pixel PXn can be electrically connected to the second electrode 220 of the first electrode unit EU1 and the fourth electrode unit EU4, and the first alignment line AL1 provided on the right side of the sub-pixel PXn can be electrically connected to the second electrode 220 of the second electrode unit EU2 and the third electrode unit EU3. However, the invention is not limited thereto. The number of first alignment lines AL1 can vary depending on the number of second electrodes 220 provided in each sub-pixel PXn.

[0171] In the second electrode 220 of each electrode unit EU, the bent portion 220R of the electrode can be electrically connected to the first alignment line AL1 through a third contact hole CT3. The third contact hole CT3 can be formed in each sub-pixel PXn according to the number of second electrodes 220 electrically connected to the first alignment line AL1.

[0172] Each of the first voltage line VL1, the second voltage line VL2, and the first alignment line AL1 can extend in the second direction DR2 to connect to a pad (or "soldering pad") disposed in the non-display area NDA. The first voltage line VL1, the second voltage line VL2, and the first alignment line AL1 can receive electrical signals from the pad and transmit the electrical signals to the corresponding electrodes 210 and 220.

[0173] During the manufacturing process of the display device 10, alignment signals for aligning the light-emitting element 300 can be applied via a first voltage line VL1 and a first alignment line AL1. The alignment signal applied to the first voltage line VL1 can be transmitted to the first electrode 210, and the alignment signal applied to the first alignment line AL1 can be transmitted to the second electrode 220. The alignment signals transmitted to the first electrode 210 and the second electrode 220 can generate an electric field between the first electrode 210 and the second electrode 220, and the light-emitting element 300 can be positioned between the first electrode 210 and the second electrode 220 due to the electric field.

[0174] However, when the display device 10 is driven, a driving signal for driving the light-emitting element 300 can be applied through the first voltage line VL1 and the second voltage line VL2. During the manufacturing process of the display device 10 and during the driving of the display device 10, different electrical signals can be applied to the first electrode 210 through the same first voltage line VL1. On the other hand, during the manufacturing process of the display device 10 and during the driving of the display device 10, different signals can be applied to the second electrode 220 through different lines. Among the lines connected to the second electrode 220, the first alignment line AL1, to which the alignment signal is applied, can be partially disconnected after the light-emitting element 300 is aligned.

[0175] Figure 8 It is along Figure 6 The sectional view taken from line III-III'.

[0176] Reference Figure 6 and Figure 8 According to one embodiment, the display device 10 may include multiple floating lines AL1a and AL1b in which a first alignment line AL1 is partially broken. The first alignment line AL1 disposed in each sub-pixel PXn may include a first floating line AL1a and a second floating line AL1b. The first floating line AL1a and the second floating line AL1b may extend in a second direction DR2 and may be partially broken in the non-light-emitting area of ​​each sub-pixel PXn.

[0177] like Figure 8 As shown, a line contact hole (CLT) can be formed through the first planarization layer 109 in the non-light-emitting area of ​​each sub-pixel PXn (see Figure 1). Figure 8 After aligning the light-emitting element 300, a line contact hole CLT can be formed to expose a portion of the first alignment line AL1. The exposed portion of the first alignment line AL1 can be etched and broken, and the first alignment line AL1 can be separated into a first floating line AL1a and a second floating line AL1b. The first floating line AL1a can be a line that contacts the second electrode 220 through a third contact hole CT3, and the second floating line AL1b can be a line that contacts the second electrode 220 of another sub-pixel PXn. The first floating line AL1a and the second floating line AL1b can be non-electrically connected to each other and can also be electrically disconnected from pads disposed in non-display areas.

[0178] During the manufacturing process of the display device 10, an alignment signal can be applied to the second electrode 220 via the first alignment line AL1. When the display device 10 is driven, only the electrical signal applied to the second voltage line VL2 can be transmitted to the second electrode 220, and the electrical signal may not be transmitted to the first alignment line AL1 or the floating lines AL1a and AL1b.

[0179] Meanwhile, the light-emitting element 300 can be a light-emitting diode, and specifically, it can be an inorganic light-emitting diode having a micrometer-scale or nanometer-scale size and made of inorganic materials. The inorganic light-emitting diode can be aligned between two facing electrodes when an electric field is formed in a specific direction between two polarized electrodes therein. The light-emitting element 300 can be aligned between the two electrodes due to the electric field formed on the two electrodes.

[0180] The light-emitting element 300 according to one embodiment may have a shape extending in one direction. The light-emitting element 300 may have a rod-shaped, linear, or tubular shape, etc. In an exemplary embodiment, the light-emitting element 300 may have a cylindrical or rod-shaped shape. However, the shape of the light-emitting element 300 is not limited to these; the light-emitting element 300 may have various shapes including a cubic shape, a cuboid shape, a polygonal prism shape such as a hexagonal prism, or a shape extending in one direction and having a partially inclined outer surface. The plurality of semiconductor layers included in the light-emitting element 300, which will be described below, may have a structure in which the semiconductor layers are sequentially disposed or stacked in one direction.

[0181] The light-emitting element 300 may include a semiconductor layer doped with impurities of any conductivity type (e.g., p-type or n-type). The semiconductor layer may receive electrical signals applied from an external power source and emit light within a specific wavelength range.

[0182] Figure 9 This is a schematic diagram of a light-emitting element according to one embodiment.

[0183] Reference Figure 9 The light-emitting element 300 may include a first semiconductor layer 310, a second semiconductor layer 320, an active layer 330, an electrode layer 370, and an insulating film 380.

[0184] The first semiconductor layer 310 may be an n-type semiconductor layer. As an example, when the light-emitting element 300 emits light in the blue wavelength range, the first semiconductor layer 310 may include a semiconductor layer with the chemical formula Al. x Ga y In 1-x-y A semiconductor material of type N (0≤x≤1, 0≤y≤1, 0≤x+y≤1). For example, the semiconductor material can be one or more of AlGaInN, GaN, AlGaN, InGaN, AlN, and InN doped with n-type impurities. The first semiconductor layer 310 can be doped with an n-type dopant. As an example, the n-type dopant can be Si, Ge, or Sn, etc. In an exemplary embodiment, the first semiconductor layer 310 can be n-GaN doped with n-type Si. The length of the first semiconductor layer 310 can be in the range of 1.5 μm to 5 μm, but the invention is not limited thereto.

[0185] A second semiconductor layer 320 is disposed on the active layer 330, which will be described below. The second semiconductor layer 320 may be a p-type semiconductor. As an example, when the light-emitting element 300 emits light in the blue or green wavelength range, the second semiconductor layer 320 may include a semiconductor with the chemical formula Al. x Ga y In 1-x-y A semiconductor material of type N (0≤x≤1, 0≤y≤1, 0≤x+y≤1). For example, the semiconductor material can be one or more of AlGaInN, GaN, AlGaN, InGaN, AlN, and InN doped with p-type impurities. The second semiconductor layer 320 can be doped with a p-type dopant. As an example, the p-type dopant can be Mg, Zn, Ca, or Ba, etc. In an exemplary embodiment, the second semiconductor layer 320 can be p-GaN doped with p-type Mg. The length of the second semiconductor layer 320 can be in the range of 0.05 μm to 0.10 μm, but the present invention is not limited thereto.

[0186] Meanwhile, each of the first semiconductor layer 310 and the second semiconductor layer 320 is shown in the figures as being formed as a single layer, but the invention is not limited thereto. According to some embodiments, depending on the material of the active layer 330, each of the first semiconductor layer 310 and the second semiconductor layer 320 may also include a greater number of layers, such as a cladding layer or a tensile strain barrier reduction (TSBR) layer. A description thereof will be provided below with reference to other figures.

[0187] An active layer 330 is disposed between a first semiconductor layer 310 and a second semiconductor layer 320. The active layer 330 may comprise a material having a single quantum well structure or a multiple quantum well structure. When the active layer 330 comprises a material having a multiple quantum well structure, the active layer 330 may have a structure in which quantum layers and well layers are alternately stacked. In response to an electrical signal applied through the first semiconductor layer 310 and the second semiconductor layer 320, the active layer 330 may emit light due to the recombination of electron-hole pairs. As an example, when the active layer 330 emits light in the blue wavelength range, the active layer 330 may comprise a material such as AlGaN or AlGaInN. In particular, when the active layer 330 has a multiple quantum well structure in which quantum layers and well layers are alternately stacked, the quantum layers may comprise a material such as AlGaN or AlGaInN, and the well layers may comprise a material such as GaN or AlInN. In an exemplary embodiment, the active layer 330 comprises AlGaInN as a quantum layer and AlInN as a well layer. As described above, the active layer 330 can emit blue light with a center wavelength range in the range of 450 nm to 495 nm.

[0188] However, the present invention is not limited thereto, and the active layer 330 may have a structure in which semiconductor materials with large band gaps and semiconductor materials with small band gaps are stacked alternately, or may include other group III or group V semiconductor materials depending on the wavelength range of the emitted light. The light emitted by the active layer 330 is not limited to light in the blue wavelength range, and in some cases, the active layer 330 may also emit light in the red or green wavelength range. The length of the active layer 330 may be in the range of 0.05 μm to 0.10 μm, but the present invention is not limited thereto.

[0189] Simultaneously, the light emitted from the active layer 330 can be emitted not only to the outer surface of the light-emitting element 300 along its length, but also to both side surfaces of the light-emitting element 300. The directionality of the light emitted from the active layer 330 is not limited to one direction.

[0190] Electrode layer 370 may be an ohmic contact electrode. However, the invention is not limited thereto, and electrode layer 370 may also be a Schottky contact electrode. Light-emitting element 300 may include at least one electrode layer 370. Although light-emitting element 300 in Figure 9 The light-emitting element 300 is shown as including a single electrode layer 370, but the invention is not limited thereto. In some cases, the light-emitting element 300 may include a greater number of electrode layers 370, or the electrode layers 370 may be omitted. The description of the light-emitting element 300 provided below applies equally even when the number of electrode layers 370 varies or other structures are further included.

[0191] When the light-emitting element 300 is electrically connected to electrodes 210 and 220 or contact electrode 260, the electrode layer 370 can reduce the resistance between the light-emitting element 300 and the electrodes or contact electrodes. The electrode layer 370 may comprise a conductive metal. For example, the electrode layer 370 may comprise at least one of aluminum (Al), titanium (Ti), indium (In), gold (Au), silver (Ag), indium tin oxide (ITO), indium zinc oxide (IZO), and indium tin zinc oxide (ITZO). Furthermore, the electrode layer 370 may comprise a semiconductor material doped with n-type or p-type impurities. However, the invention is not limited thereto.

[0192] An insulating film 380 is configured to surround the outer surfaces of the plurality of semiconductor layers and electrode layers described above. In an exemplary embodiment, the insulating film 380 may be configured to at least surround the outer surface of the active layer 330 and may extend in one direction along which the light-emitting element 300 extends. The insulating film 380 may be used to protect a component. As an example, the insulating film 380 may be formed to surround a side surface portion of the component and expose both ends of the light-emitting element 300 in the length direction.

[0193] In the accompanying drawings, the insulating film 380 is shown as being formed to extend along the length of the light-emitting element 300 to cover the side surface of the electrode layer 370 from the first semiconductor layer 310, but the invention is not limited thereto. Since the insulating film 380 only covers the outer surface of some of the semiconductor layers, including the active layer 330, or only covers a portion of the outer surface of the electrode layer 370, the outer surface of the electrode layer 370 can be partially exposed. Furthermore, the upper surface of the insulating film 380 can be formed with a circular cross-section in the region adjacent to at least one end of the light-emitting element 300.

[0194] The thickness of the insulating film 380 can be in the range of 10 nm to 1.0 μm, but the present invention is not limited thereto. Preferably, the thickness of the insulating film 380 is about 40 nm.

[0195] The insulating film 380 may include a material with insulating properties, such as silicon oxide (SiO2). x Silicon nitride (SiN) x ), silicon oxynitride (SiO) x N y ), aluminum nitride (Al) x N y ), aluminum oxide (Al) x O y Therefore, it is possible to prevent electrical short circuits that may occur when the active layer 330 comes into direct contact with the electrodes through which electrical signals are transmitted to the light-emitting element 300. Furthermore, since the insulating film 380 protects the outer surface of the light-emitting element 300, including the active layer 330, it is possible to prevent degradation of luminous efficiency.

[0196] Furthermore, in some embodiments, the outer surface of the insulating film 380 may be surface-treated. When manufacturing the display device 10, the light-emitting element 300 may be sprayed onto the electrode in a dispersed state in ink and aligned. Here, in order to maintain the state in which the light-emitting element 300 is dispersed in ink and does not aggregate with another adjacent light-emitting element 300, the surface of the insulating film 380 may be treated with a hydrophobic or hydrophilic treatment.

[0197] The light-emitting element 300 may have a length h in the range of 1 μm to 10 μm or in the range of 2 μm to 6 μm (preferably in the range of 3 μm to 5 μm). Furthermore, the diameter of the light-emitting element 300 may be in the range of 300 nm to 700 nm, and the aspect ratio of the light-emitting element 300 may be in the range of 1.2 to 100. However, the invention is not limited thereto, and the plurality of light-emitting elements 300 included in the display device 10 may have different diameters depending on the compositional differences of the active layer 330. Preferably, the diameter of the light-emitting element 300 may be approximately 500 nm.

[0198] In the following description, the manufacturing process of a display device 10 according to one embodiment will be described with reference to other accompanying drawings.

[0199] Figures 10 to 12 This is a plan view illustrating a portion of the manufacturing process of a display device according to one embodiment.

[0200] First, refer to Figure 10 A first electrode 210 and a second electrode 220 are formed in each sub-pixel PXn. Since the shapes of the first electrode 210 and the second electrode 220 are the same as described above, their detailed description will be omitted. The first electrode 210 can be electrically connected to a first voltage line VL1, and the second electrode 220 can be electrically connected to a first alignment line AL1 and a driving transistor DT. The first alignment line AL1 can extend in the second direction DR2 as a floating line without being disconnected or separated.

[0201] Subsequently, referring to Figure 11 Multiple light-emitting elements 300 are disposed between a first electrode 210 and a second electrode 220. The process of aligning the light-emitting elements 300 can be performed by spraying ink in which the light-emitting elements 300 are dispersed and applying an alignment signal to the first electrode 210 and the second electrode 220. When the alignment signal is applied to the first electrode 210 and the second electrode 220, an electric field is generated between the first electrode 210 and the second electrode 220, and the light-emitting elements 300 dispersed in the ink are subjected to dielectric force by the electric field. The light-emitting elements 300 subjected to dielectric force can be placed between the first electrode 210 and the second electrode 220, while changing their orientation direction and position through the dielectric force. As described above, the light-emitting elements 300 can be disposed between a first outer edge OS1 of the first electrode 210 and a second outer edge OS2 of the second electrode 220 to have various orientation directions. Multiple light-emitting elements 300 can be arranged along the curved side of the first outer edge OS1, and their orientation directions can be different from each other.

[0202] Simultaneously, an alignment signal transmitted to the first electrode 210 can be applied via the first voltage line VL1, and an alignment signal transmitted to the second electrode 220 can be applied via the first alignment line AL1. The alignment signal for aligning the light-emitting element 300 can be applied while the first alignment line AL1 is connected. Subsequently, in subsequent processes, the first alignment line AL1, configured to transmit the alignment signal to the second electrode 220, can be partially disconnected.

[0203] Reference Figure 12 A portion of the first alignment line AL1 is patterned so that it can be separated into multiple floating lines AL1a and AL1b. The first alignment line AL1 can be located in the non-light-emitting area of ​​each sub-pixel PXn (…). Figure 12The portion of CB is patterned. Its description is the same as above.

[0204] Subsequently, although not shown in the accompanying drawings, the display device 10 can be manufactured by forming a second insulating layer 520, contact electrodes 261 and 262, and a third insulating layer 550 disposed on the light-emitting element 300.

[0205] Various embodiments of the display device 10 will be described below.

[0206] Figure 13 This is a plan view showing a sub-pixel of a display device according to another embodiment.

[0207] Reference Figure 13 In a display device 10_1 according to one embodiment, each sub-pixel PXn may include a greater number of electrode units EU. When the area occupied by a sub-pixel PXn increases, a greater number of electrode units EU (e.g., four or more electrode units EU) can be provided in each sub-pixel PXn. In an exemplary embodiment, some of the electrodes 210 and 220 in the electrode units EU may be directly connected to the electrodes 210 and 220 of another electrode unit EU, or may be integral with the electrodes 210 and 220 of another electrode unit EU, and may form another type of electrode 210 and 220. Figure 13 The display device 10_1 and Figure 2 The difference in the embodiment of the display device 10 is that each sub-pixel PXn further includes a greater number of electrode units EU and another type of electrode unit EU. In the following, repeated descriptions will be omitted, and the description will be based on the differences from the above.

[0208] In addition to the first electrode unit EU1, the second electrode unit EU2, the third electrode unit EU3, and the fourth electrode unit EU4, Figure 13 The display device 10_1 may further include a fifth electrode unit EU5, a sixth electrode unit EU6, a seventh electrode unit EU7, and an eighth electrode unit EU8. The fifth electrode unit EU5 may be located on one side of the second electrode unit EU2 in the first direction DR1, and the sixth electrode unit EU6 may be located on one side of the fifth electrode unit EU5 in the first direction DR1. The fifth electrode unit EU5 and the sixth electrode unit EU6 may each have the same shape as the first electrode unit EU1 and the second electrode unit EU2. Similarly, the eighth electrode unit EU8 may be located on one side of the third electrode unit EU3 in the first direction DR1, and the seventh electrode unit EU7 may be located on one side of the eighth electrode unit EU8 in the first direction DR1. The seventh electrode unit EU7 and the eighth electrode unit EU8 may each have the same shape as the third electrode unit EU3 and the fourth electrode unit EU4.

[0209] As described above, in some of the multiple electrode units EU, the second electrode 220 can be directly connected and integral. In the fifth electrode unit EU5, the sixth electrode unit EU6, the seventh electrode unit EU7, and the eighth electrode unit EU8, the second electrode 220 can be connected to each other as in the first electrode unit EU1, the second electrode unit EU2, the third electrode unit EU3, and the fourth electrode unit EU4. Furthermore, in the fifth electrode unit EU5, the second electrode 220 may also include an electrode protrusion 220P.

[0210] Simultaneously, the second electrode unit EU2 and the fifth electrode unit EU5, as well as the third electrode unit EU3 and the eighth electrode unit EU8, can be formed with a symmetrical structure relative to the center of the sub-pixel PXn. In the second electrode unit EU2 and the fifth electrode unit EU5, and in the third electrode unit EU3 and the eighth electrode unit EU8, the first electrode 210 can be integrally formed, thereby forming another type of first electrode 210 or electrode unit EU.

[0211] In the first electrode 210 of the second electrode unit EU2 and the first electrode 210 of the fifth electrode unit EU5, the second short side SS2 extending in the second direction DR2 can be integral, and the first outer side OS1 can be connected to each other. The first short side SS1 extending in the first direction DR1 can have a greater length. In the electrode unit EU of the display device 10_1 according to one embodiment, the electrode unit EU including the first electrode 210 having a semi-circular shape comprising a short side extending in the first direction DR1 and connecting the two sides of the short side can be a second type of electrode unit. As shown in the figures, in the second electrode unit EU2 and the fifth electrode unit EU5, and in the third electrode unit EU3 and the eighth electrode unit EU8, the first electrode 210 can be integral with a semi-circular shape, and the fourth short side SS4 of the second electrode 220 can also be integral with a semi-circular arc shape. In the figures, the electrode units are shown as different electrode units depending on the region, for example, the second electrode unit EU2 and the fifth electrode unit EU5, and the third electrode unit EU3 and the eighth electrode unit EU8, but the invention is not limited thereto. Since the first electrode 210 of the second electrode unit EU2 and the fifth electrode unit EU5 are integral and the second electrode 220 of the second electrode unit EU2 and the fifth electrode unit EU5 are integral, and the first electrode 210 of the third electrode unit EU3 and the eighth electrode unit EU8 are integral and the second electrode 220 of the third electrode unit EU3 and the eighth electrode unit EU8 are integral, the second electrode unit EU2 and the fifth electrode unit EU5, as well as the third electrode unit EU3 and the eighth electrode unit EU8, can all form an electrode unit EU with a different shape.

[0212] When a short side of a first electrode 210 of the first type with a quarter-circular shape is integral with a short side of another first electrode 210 of the first type with a quarter-circular shape, the first electrode 210 may have a semi-circular shape. The display device 10_1 may also include a second type of first electrode 210 with a semi-circular shape. The second type of first electrode 210 may include a short side extending in a first direction DR1 or a second direction DR2 and a first outer edge OS1 connecting the two sides of the short side. The center of curvature of the first outer edge OS1 may be located between the two sides of the short side. As an example, the center of curvature of the first outer edge OS1 may be the midpoint between the two sides of the short side.

[0213] The second outer edge OS2 of the second electrode 220 may have a shape corresponding to the first outer edge OS1 of the first electrode 210. When the first electrode 210 has a second type shape, the second outer edge OS2 of the second electrode 220 may have a shape such as a semi-circular arc. In a display device 10_1 according to one embodiment, each sub-pixel PXn includes a plurality of first type electrode units, and in some of the first type electrode units, each of electrodes 210 and 220 may be partially integrated to form an electrode unit EU of another type. Figure 13 In one embodiment, a sub-pixel PXn may include two second-type electrode units and four first-type electrode units.

[0214] Figure 14 This is a plan view showing a sub-pixel of a display device according to yet another embodiment.

[0215] Reference Figure 14 According to one embodiment, the display device 10_2 may include a greater number of electrode units EU, and each sub-pixel PXn may also include another type of first electrode 210 and another type of electrode unit EU. Figure 14 The display device 10_2 and Figure 13 The difference between the display device 10_1 and the embodiment is that the display device 10_2 includes a greater number of electrode units EU.

[0216] exist Figure 14 In the display device 10_2, a sub-pixel PXn may further include a ninth electrode unit EU9, a tenth electrode unit EU10, an eleventh electrode unit EU11, and a twelfth electrode unit EU12. Figure 13 In the sub-pixel PXn, the ninth electrode unit EU9, the tenth electrode unit EU10, the eleventh electrode unit EU11, and the twelfth electrode unit EU12 can be respectively disposed on the other side of the fourth electrode unit EU4 on the second direction DR2, the other side of the third electrode unit EU3 on the second direction DR2, the other side of the eighth electrode unit EU8 on the second direction DR2, and the other side of the seventh electrode unit EU7 on the second direction DR2. Among the ninth electrode unit EU9, the tenth electrode unit EU10, the eleventh electrode unit EU11, and the twelfth electrode unit EU12, a short side of the first electrode 210 of the ninth electrode unit EU9 and the twelfth electrode unit EU12 can be integral with a short side of the first electrode 210 of the fourth electrode unit EU4 and the seventh electrode unit EU7, respectively. Therefore, the fourth electrode unit EU4 and the ninth electrode unit EU9, as well as the seventh electrode unit EU7 and the twelfth electrode unit EU12, can all form second-type electrode units.

[0217] Simultaneously, the tenth electrode unit EU10 and the eleventh electrode unit EU11 can be configured to contact the third electrode unit EU3 and the eighth electrode unit EU8, respectively. That is, in the first electrodes 210 of the tenth electrode unit EU10, the eleventh electrode unit EU11, the third electrode unit EU3, and the eighth electrode unit EU8, a short side can be integral with each other. According to one embodiment, the sub-pixel PXn of the display device 10_2 may further include a third type of electrode unit in which the first electrode 210 has a circular shape.

[0218] In the electrode unit EU of the display device 10_2 according to one embodiment, four first electrodes 210, each having a quarter-circular shape, are integrally formed to form a third type of first electrode 210 having a circular shape, and the electrode unit EU may include a third type of electrode unit containing the third type of first electrode 210.

[0219] The second outer edge OS2 of the second electrode 220 may have a shape corresponding to the first outer edge OS1 of the first electrode 210. When the first electrode 210 has a third type of shape, the second outer edge OS2 of the second electrode 220 may have the same shape as an arc. In a display device 10_2 according to one embodiment, each sub-pixel PXn includes a plurality of first type electrode units and a plurality of second type electrode units, and in some of the first type electrode units and second type electrode units, each of electrodes 210 and 220 may be partially integral to form an electrode unit EU of another type. Figure 14 In one embodiment, a sub-pixel PXn may include two first-type electrode units, three second-type electrode units, and one third-type electrode unit. Figure 14 Implementation examples and Figure 13 The difference in the embodiments is that they also include another type of electrodes 210 and 220 or another type of electrode unit. Repeated descriptions will be omitted.

[0220] Meanwhile, the electrode unit EU may also include other electrodes disposed between the first electrode 210 and the second electrode 220.

[0221] Figure 15 This is a plan view showing a sub-pixel of a display device according to another embodiment. Figure 16 It is shown Figure 15 A schematic plan view of the electrode unit of the display device.

[0222] Reference Figure 15 and Figure 16In a display device 10_3 according to one embodiment, the electrode unit EU_3 may further include a third electrode 230_3 and a fourth electrode 240_3 disposed between the first electrode 210_3 and the second electrode 220_3. Figure 15 and Figure 16 The display device 10_3 and Figure 2 The difference in the embodiment of the display device 10 is that each electrode unit EU_3 includes a greater number of electrodes 230_3 and 240_3. In the following, repeated descriptions will be omitted, and the third electrode 230_3 and the fourth electrode 240_3 will be described in detail.

[0223] The third electrode 230_3 can be disposed between the first electrode 210_3 and the second electrode 220_3. The third electrode 230_3 can have a shape substantially the same as the second electrode 220_3 or the electrode bending portion 220R_3, and can be configured to be spaced apart from and facing the second electrode 220_3. According to one embodiment, the third electrode 230_3 can have a bent shape corresponding to the second outer edge OS2 of the second electrode 220_3. One outer edge of the third electrode 230_3 can be spaced apart from and facing the second outer edge OS2, and the light-emitting element 300 can be disposed between said outer edge of the third electrode 230_3 and the second outer edge OS2.

[0224] A fourth electrode 240_3 may be disposed between the first electrode 210_3 and the third electrode 230_3. The fourth electrode 240_3 may also have a shape substantially the same as the second electrode 220_3 or the electrode bending portion 220R_3, and may be configured to be spaced apart from and facing the first electrode 210_3 and the third electrode 230_3. According to one embodiment, the fourth electrode 240_3 may have a bent shape corresponding to the first outer edge OS1 of the first electrode 210_3. One outer edge of the fourth electrode 240_3 may be spaced apart from and facing the first outer edge OS1, and the light-emitting element 300 may be disposed between said outer edge of the fourth electrode 240_3 and the first outer edge OS1.

[0225] The third electrode 230_3 and the fourth electrode 240_3 may both have the same center of curvature as the first outer edge OS1 of the first electrode 210_3, and may have a quarter-circle arc shape. However, as the second electrode 220_3, the third electrode 230_4, and the fourth electrode 240_3 move away from the center of curvature, the length and area of ​​each of the second electrode 220_3, the third electrode 230_4, and the fourth electrode 240_3 may increase.

[0226] The first electrode 210_3, the second electrode 220_3, the third electrode 230_3, and the fourth electrode 240_3 can be spaced apart from each other, and their curved outer edges can face each other. Their separation distances can be substantially the same, and as described above... Figure 4 As described, the separation distance of the first electrode 210_3, the second electrode 220_3, the third electrode 230_3, and the fourth electrode 240_3 can be equal to the first separation distance W1 (see...). Figure 4 The same is constant. Multiple light-emitting elements 300 can be arranged between the first electrode 210_3, the second electrode 220_3, the third electrode 230_3 and the fourth electrode 240_3.

[0227] Furthermore, the third contact electrode 263_3 and the fourth contact electrode 264_3 can be respectively disposed on the third electrode 230_3 and the fourth electrode 240_3. The third contact electrode 263_3 and the fourth contact electrode 264_3 have the same shape as the second contact electrode 262_3, and can have different sizes depending on the corresponding shapes of the third electrode 230_3 and the fourth electrode 240_3. Multiple light-emitting elements 300 can each be electrically connected to each of the first electrode 210_3, the second electrode 220_3, the third electrode 230_3, and the fourth electrode 240_3. The two ends of each of the light-emitting elements 300 can directly contact the corresponding contact electrode among the first contact electrode 261_3, the second contact electrode 262_3, the third contact electrode 263_3, and the fourth contact electrode 264_3. Detailed descriptions will be omitted.

[0228] The third electrode 230_3 and the fourth electrode 240_3 may not be directly connected to the first voltage line VL1 and the second voltage line VL2 to which the drive signal of the display device 10_3 is applied. In the display device 10_3, the drive signal applied through the first voltage line VL1 and the second voltage line VL2 may be directly transmitted to the first electrode 210_3 and the second electrode 220_3, and may not be directly transmitted to the third electrode 230_3 and the fourth electrode 240_3. The electrical signal transmitted to the first electrode 210_3 may be transmitted to the fourth electrode 240_3 through the light-emitting element 300 electrically connected to the first electrode 210_3. The electrical signal transmitted to the fourth electrode 240_3 may be transmitted through the light-emitting element 300 disposed between the fourth electrode 240_3 and the third electrode 230_3. Similarly, the electrical signal transmitted to the second electrode 220_3 may be transmitted to the third electrode 230_3 and the fourth electrode 240_3 through the light-emitting element 300 electrically connected to the second electrode 220_3.

[0229] According to one embodiment, in the display device 10_3, the electrode unit EU_3 may further include a third electrode 230_3 and a fourth electrode 240_3 that do not directly transmit electrical signals from voltage lines VL1 and VL2 to it, and the light-emitting elements 300 connected between electrodes 210_3, 220_3, 230_3 and 240_3 may be partially connected in series. Therefore, the number of light-emitting elements 300 provided per unit area can be increased, and the luminous efficiency can be improved due to the series connection.

[0230] Meanwhile, the third electrode 230_3 and the fourth electrode 240_3 may not be directly connected to the first voltage line VL1 and the second voltage line VL2, but may be directly connected to the alignment line to which the alignment signal is applied.

[0231] Figure 17 It is shown Figure 15 A schematic plan view of the electrode unit and alignment lines of the display device. Figure 18 It is along Figure 15 A sectional view taken from line IV-IV'. Figure 17 yes Figure 15 A partial enlarged view of the first electrode unit EU1_3 of the display device 10_3.

[0232] Reference Figure 17 and Figure 18 In a display device 10_3 according to one embodiment, the electrode unit EU_3 may include a greater number of electrodes, such as a third electrode 230_3 and a fourth electrode 240_3, and thus may include a greater number of inner embankments and alignment lines AL1_3, AL2_3 and AL3_3.

[0233] The third inner dam 430 and the fourth inner dam 440 can be disposed between the first inner dam 410 and the second inner dam 420. The third inner dam 430 can be disposed between the first planarization layer 109 and the third electrode 230_3, and the fourth inner dam 440 can be disposed between the first planarization layer 109 and the fourth electrode 240_3. The third inner dam 430 and the fourth inner dam 440 can both have a shape similar to that of the second inner dam 420. Detailed descriptions will be omitted.

[0234] In addition to the first alignment line AL1_3, alignment lines AL1_3, AL2_3, and AL3_3 may also include a second alignment line AL2_3 and a third alignment line AL3_3. The description of the first alignment line AL1_3 is the same as described above. The first alignment line AL1_3 can be electrically connected to the second electrode 220_3 through the third contact hole CT3_3 and can transmit alignment signals. Furthermore, the descriptions of the first voltage line VL1_3 and the second voltage line VL2_3 are also the same as described above; therefore, the second alignment line AL2_3 and the third alignment line AL3_3 will be described below.

[0235] Like the first alignment line AL1_3, the second alignment line AL2_3 and the third alignment line AL3_3 can extend in the second direction DR2. The second alignment line AL2_3 and the third alignment line AL3_3 are second data conductive layers and can be configured to overlap with the third electrode 230_3 and the fourth electrode 240_3 respectively in the thickness direction. A fourth contact hole CT4_3, exposing a portion of the second alignment line AL2_3 through the third inner wall 430 and the first planarization layer 109, can be formed in the region where the third electrode 230_3 overlaps with the second alignment line AL2_3. A fifth contact hole CT5_3, exposing a portion of the third alignment line AL3_3 through the fourth inner wall 440 and the first planarization layer 109, can be formed in the region where the fourth electrode 240_3 overlaps with the third alignment line AL3_3. The third electrode 230_3 and the fourth electrode 240_3 can be electrically connected to the second alignment line AL2_3 and the third alignment line AL3_3 respectively through the fourth contact hole CT4_3 and the fifth contact hole CT5_3. During the manufacturing process of the display device 10_3, alignment signals can be applied to the second alignment line AL2_3 and the third alignment line AL3_3, so that they can be transmitted to the third electrode 230_3 and the fourth electrode 240_3, respectively.

[0236] Simultaneously, the fourth contact hole CT4_3 can pass through the third inner dam 430 and the first planarization layer 109 to expose the second alignment line AL2_3, and the fifth contact hole CT5_3 can pass through the fourth inner dam 440 and the first planarization layer 109 to expose the third alignment line AL3_3. The third electrode 230_3 and the fourth electrode 240_3 can be electrically connected to the second alignment line AL2_3 and the third alignment line AL3_3 respectively through the fourth contact hole CT4_3 and the fifth contact hole CT5_3. Furthermore, although not shown in the figures, the second alignment line AL2_3 and the third alignment line AL3_3 can also be disconnected in the non-light-emitting area of ​​each sub-pixel PXn and separated into multiple floating lines. Repeated descriptions will be omitted below.

[0237] Meanwhile, as described above, in the electrode unit EU of the display device 10 according to some embodiments, the first electrode 210 and the second electrode 220 can be configured to be spaced apart from the electrodes 210 and 220 of another electrode unit EU. Each of the electrodes 210 and 220 may not be integrated with each other and may be electrically connected by other parts or electrodes.

[0238] Figure 19 This is a plan view showing a sub-pixel of a display device according to another embodiment.

[0239] Reference Figure 19In a display device 10_4 according to one embodiment, the second electrodes 220_4 of the electrode unit EU_4 can be configured to be spaced apart from each other, and each of them can include an electrode protrusion 220P_4, and the electrode protrusions 220P_4 can be connected to each other. Figure 19 Implementation examples and Figure 15 The difference in the embodiment is that each electrode unit EU_4 includes an electrode protrusion 220P_4, and the electrode protrusions 220P_4 are connected to each other. In the following, repeated descriptions will be omitted, and the description will be based on the differences from the above.

[0240] exist Figure 19 In the display device 10_4, the first electrode unit EU1_4, the second electrode unit EU2_4, the third electrode unit EU3_4, and the fourth electrode unit EU4_4 may each include a second electrode 220_4 having the same shape. In each of the first electrode unit EU1_4, the second electrode unit EU2_4, the third electrode unit EU3_4, and the fourth electrode unit EU4_4, the second electrode 220_4 may include an electrode bending portion 220R_4 and an electrode protrusion 220P_4. The two ends of the second electrode 220_4 of the first electrode unit EU1_4, the second electrode unit EU2_4, the third electrode unit EU3_4, and the fourth electrode unit EU4_4 may be configured to be spaced apart from each other rather than being integral with the corresponding ends of the adjacent second electrode 220_4.

[0241] However, in the first electrode unit EU1_4, the second electrode unit EU2_4, the third electrode unit EU3_4, and the fourth electrode unit EU4_4, the second electrode 220_4 may each include an electrode protrusion 220P_4, and the electrode protrusions 220P_4 may be connected to each other. In each of the first electrode unit EU1_4, the second electrode unit EU2_4, the third electrode unit EU3_4, and the fourth electrode unit EU4_4, the first outer edge OS1 of the first electrode 210_4 and the second outer edge OS2 of the second electrode 220_4 may be configured to protrude toward the center of the sub-pixel PXn, and the third electrode 230_4 and the fourth electrode 240_4 may both have a shape that curves toward the center of the sub-pixel PXn. The electrode protrusions 220P_4 of the second electrode 220_4 may protrude from the third outer edge OS3 toward the center of the sub-pixel PXn, and may be connected to each other at the center of the sub-pixel PXn.

[0242] In the display device 10_4 according to one embodiment, even when the second electrode 220_4 is not integral, the electrode protrusions 220P_4 are connected to each other, so that a plurality of first electrode units EU1_4, second electrode units EU2_4, third electrode units EU3_4, and fourth electrode units EU4_4 can be electrically connected to the driving transistor DT through a second contact hole CT2. Therefore, the same electrical signal can be transmitted to the second electrodes 220_4 of the first electrode units EU1_4, second electrode units EU2_4, third electrode units EU3_4, and fourth electrode units EU4_4. In the light-emitting elements 300 of each electrode unit EU_4, the light-emitting elements 300 disposed between different electrodes can be configured to be connected in series with each other, and the light-emitting elements 300 of different electrode units EU_4 can be configured to be connected in parallel with each other.

[0243] Meanwhile, in some embodiments, the first electrode 210 of one electrode unit EU can be electrically connected to the second electrode 220 of another electrode unit EU. An electrical signal transmitted to the second electrode 220 can be transmitted from the first electrode 210 to the second electrode 220 of the other electrode unit EU. According to one embodiment, in the plurality of electrode units EU disposed in each sub-pixel PXn, the light-emitting element 300 can be configured to be connected in series with each other.

[0244] Figure 20 This is a plan view showing a sub-pixel of a display device according to another embodiment.

[0245] Reference Figure 20 According to one embodiment, the display device 10_5 may further include bridging electrodes BE1_5, BE2_5 and BE3_5, which are disposed in each sub-pixel PXn and each has a first electrode 210_5 electrically connected to one electrode unit EU_5 and a second electrode 220_5 electrically connected to another electrode unit EU_5 on the other side. Figure 20 Implementation examples and Figure 19 The embodiment differs in that it also includes bridging electrodes BE1_5, BE2_5, and BE3_5 that connect the first electrode 210_5 and the second electrode 220_5 of the different electrode units EU_5, and only any second electrode 220_5 includes an electrode protrusion 220P. In the following, repeated descriptions will be omitted, and the bridging electrodes BE1_5, BE2_5, and BE3_5 will be described in detail.

[0246] One side of each of the bridging electrodes BE1_5, BE2_5, and BE3_5 can be electrically connected to the first electrode 210_5 of an electrode unit EU_5. For example, one side of the first bridging electrode BE1_5 can be directly connected to the first electrode 210_5 of the first electrode unit EU1_5, one side of the second bridging electrode BE2_5 can be directly connected to the first electrode 210_5 of the second electrode unit EU2_5, and one side of the third bridging electrode BE3_5 can be directly connected to the first electrode 210_5 of the third electrode unit EU3_5.

[0247] Furthermore, the other side of each of the bridging electrodes BE1_5, BE2_5, and BE3_5 can be electrically connected to the second electrode 220_5 of any one of the electrode units EU_5. For example, the other side of the first bridging electrode BE1_5 can be directly connected to the second electrode 220_5 of the second electrode unit EU2_5, the other side of the second bridging electrode BE2_5 can be directly connected to the second electrode 220_5 of the third electrode unit EU3_5, and the other side of the third bridging electrode BE3_5 can be directly connected to the second electrode 220_5 of the fourth electrode unit EU4_5.

[0248] In the accompanying drawings, bridging electrodes BE1_5, BE2_5, and BE3_5 are shown disposed in the non-light-emitting region and having a shape extending in one direction, and connected to the first electrode 210_5 and the second electrode 220_5 of different electrode units EU_5. However, the invention is not limited thereto, and the shapes of bridging electrodes BE1_5, BE2_5, and BE3_5 can be modified in various ways according to the area of ​​the sub-pixel PXn.

[0249] The first electrode 210_5 and the second electrode 220_5 connected to the bridging electrodes BE1_5, BE2_5, and BE3_5 do not need to be directly connected to the first voltage line VL1 and the second voltage line VL2, respectively. That is, the first contact hole CT1 and the second contact hole CT2 do not need to be formed in the first electrode 210_5 and the second electrode 220_5 connected to the bridging electrodes BE1_5, BE2_5, and BE3_5, respectively. Like the third electrode 230_5 and the fourth electrode 240_5, electrical signals can be substantially transmitted to the first electrode 210_5 and the second electrode 220_5 through the light-emitting element 300 or the bridging electrodes BE1_5, BE2_5, and BE3_5.

[0250] For example, the first electrode 210_5 of the first electrode unit EU1_5, the second electrode unit EU2_5, and the third electrode unit EU3_5 can be connected to the bridging electrodes BE1_5, BE2_5, and BE3_5, respectively, and can be decoupled from the first voltage line VL1. The first electrode 210_5 of the fourth electrode unit EU4_5 is electrically connected to the first voltage line VL1 through the first contact hole CT1. Similarly, the second electrodes 220_5 of the second electrode unit EU2_5, the third electrode unit EU3_5, and the fourth electrode unit EU4_5 can be connected to the bridging electrodes BE1_5, BE2_5, and BE3_5, respectively, and can be decoupled from the driving transistor DT. The second electrode 220_5 of the first electrode unit EU1_5 may include an electrode protrusion 220P_5 and can be electrically connected to the driving transistor DT through the second contact hole CT2.

[0251] Bridging electrodes BE1_5, BE2_5, and BE3_5 can electrically connect the first electrode 210_5 and the second electrode 220_5 of different electrode units EU_5, and when the display device 10_5 is driven, drive signals can be transmitted through bridging electrodes BE1_5, BE2_5, and BE3_5. Drive signals transmitted to the second electrode 220_5 of the first electrode unit EU1_5 are transmitted to the first electrode 210_5 of the first electrode unit EU1_5, and then transmitted to the second electrode 220_5 of the second electrode unit EU2_5 via the first bridging electrode BE1_5. Similarly, drive signals transmitted to the second electrode 220_5 of the second electrode unit EU2_5 can be transmitted to other electrode units EU_5 via the first electrode 210_5 and the bridging electrodes BE2_5 and BE3_5. The driving signal transmitted to the first electrode 210_5 of the fourth electrode unit EU4_5 can also be similarly transmitted to other electrode units EU_5 via the second electrode 220_5 and bridging electrodes BE1_5, BE2_5 and BE3_5. According to one embodiment, the display device 10_5 may further include bridging electrodes BE1_5, BE2_5 and BE3_5, which interconnect the electrode units EU_5 of each sub-pixel PXn, such that the light-emitting elements 300 of different electrode units EU_5 are configured to be connected in series.

[0252] Reference Figure 19 and Figure 20 In one embodiment, in the display device 10, some electrode units EU can be connected via bridging electrodes BE, and some other electrode units EU can be connected via electrode protrusions 220P of the second electrode 220.

[0253] Figure 21 and Figure 22The above are plan views of a sub-pixel of a display device according to another embodiment.

[0254] Reference Figure 21 In a display device 10_6 according to one embodiment, the electrode protrusion 220P_6 of the second electrode 220_6 can be connected to each other in some electrode units EU_6, and the first electrodes 210_6 of the electrode units EU_6 are respectively connected to the second electrodes 220_6 in some other electrode units EU_6 via bridging electrodes BE1_6 and BE3_6. For example, in Figure 21 In the display device 10_6, each of the second electrodes 220_6 of the first electrode unit EU1_6 and the third electrode unit EU3_6 may include an electrode protrusion 220P_6, and the electrode protrusions 220P_6 may be connected to each other. Furthermore, the first electrode 210_6 of the first electrode unit EU1_6 can be connected to the second electrode 220_6 of the second electrode unit EU2_6 via a first bridging electrode BE1_6, and the first electrode 210_6 of the third electrode unit EU3_6 can be connected to the second electrode 220_6 of the fourth electrode unit EU4_6 via a third bridging electrode BE3_6.

[0255] In the first electrode unit EU1_6 and the third electrode unit EU3_6, the second electrode 220_6 can be electrically connected to the driving transistor DT through the second contact hole CT2, and in each of the second electrode unit EU2_6 and the fourth electrode unit EU4_6, the first electrode 210_6 can be electrically connected to the first voltage line VL1 through the first contact hole CT1. Other descriptions may be the same as described above.

[0256] Reference Figure 22 According to one embodiment, the display device 10_7 may include a greater number and different types of electrode units EU_7 and a greater number of bridging electrodes BE1_7, BE2_7, BE3_7 and BE4_7. Figure 22 Implementation examples and Figure 13 and Figure 15 The difference in the embodiments is that they also include bridging electrodes BE1_7, BE2_7, BE3_7 and BE4_7.

[0257] Specifically, the display device 10_7 includes a first electrode unit EU1_7, a second electrode unit EU2_7, a third electrode unit EU3_7, a fourth electrode unit EU4_7, a fifth electrode unit EU5_7, a sixth electrode unit EU6_7, a seventh electrode unit EU7_7, and an eighth electrode unit EU8_7. Among these electrode units, the first electrode unit EU1_7, the fourth electrode unit EU4_7, the sixth electrode unit EU6_7, and the seventh electrode unit EU7_7 can be first-type electrode units. The other electrode units EU_7 can be integrally formed to construct second-type electrode units. Furthermore, each of the electrode units EU_7 can include a third electrode 230_7 and a fourth electrode 240_7. Its description is consistent with the above reference. Figure 13 and Figure 15 The descriptions are the same.

[0258] The bridging electrodes BE1_7, BE2_7, BE3_7, and BE4_7 may include a first bridging electrode BE1_7, a second bridging electrode BE2_7, a third bridging electrode BE3_7, and a fourth bridging electrode BE4_7. The first bridging electrode BE1_7 can be connected to the first electrode 210_7 of the first electrode unit EU1_7 and the second electrode 220_7 of the second electrode unit EU2_7. The second bridging electrode BE2_7 can be connected to the first electrode 210_7 of the fifth electrode unit EU5_7 and the second electrode 220_7 of the sixth electrode unit EU6_7. The third bridging electrode BE3_7 can be connected to the first electrode 210_7 of the seventh electrode unit EU7_7 and the second electrode 220_7 of the eighth electrode unit EU8_7. The fourth bridging electrode BE4_7 can be connected to the first electrode 210_7 of the third electrode unit EU3_7 and the second electrode 220_7 of the fourth electrode unit EU4_7. In each of the first electrode unit EU1_7 and the seventh electrode unit EU7_7, the second electrode 220_7 may include an electrode protrusion 220P_7 and can be electrically connected to the driving transistor DT through the second contact hole CT2. Furthermore, each of the fourth electrode unit EU4_7 and the sixth electrode unit EU6_7 can be electrically connected to the first voltage line VL1 through the first contact hole CT1. Its description is consistent with the above reference. Figure 19 and Figure 20 Since the descriptions are identical, their detailed descriptions will be omitted.

[0259] In some embodiments, the display device 10 may further include a bridging electrode BE, such that the first electrode 210 or the second electrode 220 of some electrode units EU may not be electrically connected to the first voltage line VL1 or the driving transistor DT. Therefore, the light-emitting elements 300 between different electrode units EU can be configured to be connected in series. Similarly, the display device 10 according to one embodiment may further include a connecting electrode that connects the third electrode 230 and the fourth electrode 240 to the first electrode 210 or the second electrode 220 during the manufacturing process.

[0260] Figure 23 This is a plan view showing a sub-pixel of a display device according to another embodiment.

[0261] Reference Figure 23 According to one embodiment, the display device 10_8 may include a plurality of floating patterns FE1_8 and FE2_8 disposed in each sub-pixel PXn and spaced apart from some electrodes 210_8, 220_8, 230_8 and 240_8. Figure 23 Implementation examples and Figure 15 The difference in the embodiments is that floating patterns FE1_8 and FE2_8 are also included. In the following, repeated descriptions will be omitted, and the description will be based on the differences from the above.

[0262] The floating patterns FE1_8 and FE2_8 may include a plurality of first floating patterns FE1_8, each having a shape extending in a first direction DR1, and a plurality of second floating patterns FE2_8, each having a shape extending in a second direction DR2. The first floating patterns FE1_8 and the second floating patterns FE2_8 may be disposed in the non-light-emitting area of ​​each sub-pixel PXn and on one side of each electrode unit EU_8 in the first direction DR1 and the second direction DR2. The two first floating patterns FE1_8 may be disposed on the upper and lower sides relative to the center of the sub-pixel PXn. The first floating pattern FE1_8 may be configured to correspond to the first electrode unit EU1_8, the second electrode unit EU2_8, the third electrode unit EU3_8, and the fourth electrode unit EU4_8, respectively. A second floating pattern FE2_8 may be disposed on the left and right sides relative to the center of the sub-pixel PXn. The second floating pattern FE2_8 may be configured to correspond to the first electrode unit EU1_8 and the fourth electrode unit EU4_8, and the second electrode unit EU2_8 and the third electrode unit EU3_8, respectively. In the following description, as an example, floating patterns FE1_8 and FE2_8 will be described as corresponding to the first electrode unit EU1_8. It will be understood that the following description can also be applied to other floating patterns FE1_8 and FE2_8.

[0263] At least some of the floating patterns FE1_8 and FE2_8 can be arranged in a state spaced apart from at least some of the electrodes of the electrode unit EU_8. According to one embodiment, the first floating pattern FE1_8 may include a portion having a shape extending in a first direction DR1 and being arranged to be spaced apart from at least the first electrode 210_8 and the third electrode 230_8 in a second direction DR2. For example, the first floating pattern FE1_8 may be arranged to be spaced apart from the first short side SS1 of the first electrode 210_8 and the short side of the third electrode 230_8 facing the second direction DR2 of the two short sides of the third electrode 230_8.

[0264] Similarly, according to one embodiment, the second floating pattern FE2_8 may include a portion having a shape extending in the second direction DR2 and being spaced apart from at least the second electrode 220_8 and the fourth electrode 240_8 in the first direction DR1. For example, the second floating pattern FE2_8 may be spaced apart from the fourth short side SS4 of the second electrode 220_8 and the short side of the fourth electrode 240_8 facing the first direction DR1 of the two short sides of the fourth electrode 240_8.

[0265] The floating patterns FE1_8 and FE2_8 may be patterns formed during the manufacturing process of the display device 10_8 in a state connected to other electrodes and then disconnected in subsequent processes. As an example, the first floating pattern FE1_8 may be a pattern formed in a state connected to the first electrode 210_8 and the third electrode 230_8 and then disconnected in subsequent processes, and the second floating pattern FE2_8 may be a pattern formed in a state connected to the second electrode 220_8 and the fourth electrode 240_8 and then disconnected in subsequent processes.

[0266] Figure 24 and Figure 25 It is shown Figure 23 A plan view of a part of the manufacturing process of a display device.

[0267] When reference Figure 24 and Figure 25In a detailed description, during the manufacturing process of the display device 10_8, in each electrode unit EU_8, the first electrode 210_8 and the third electrode 230_8, as well as the second electrode 220_8 and the fourth electrode 240_8, can be electrically connected to each other via connecting electrodes CE1_8 and CE2_8, respectively. Connecting electrodes CE1_8 and CE2_8 may include a first connecting electrode CE1_8 connected to both the first electrode 210_8 and the third electrode 230_8, and a second connecting electrode CE2_8 connected to both the second electrode 220_8 and the fourth electrode 240_8. The first connecting electrode CE1_8 and the second connecting electrode CE2_8 may be disposed in a non-light-emitting area and may have shapes extending in a first direction DR1 and a second direction DR2, respectively. Furthermore, connecting electrodes CE1_8 and CE2_8 may be configured to correspond to each electrode unit EU_8. Hereinafter, connecting electrodes CE1_8 and CE2_8 configured to correspond to the first electrode unit EU1_8 will be described as examples. It will be understood that the following description can also be applied to the other connection electrodes CE1_8 and CE2_8.

[0268] During the manufacturing process of the display device 10_8, the alignment signal can be transmitted to the first electrode 210_8 via the first voltage line VL1, and to the second electrode 220_8 via the first alignment line AL1. For example, in Figure 17 In some embodiments, the alignment signal can also be transmitted to the third electrode 230_8 and the fourth electrode 240_8 via the second alignment line AL2 and the third alignment line AL3, but the invention is not limited thereto. In some embodiments, the second alignment line AL2 and the third alignment line AL3 can be omitted, and the fourth contact hole CT4 and the fifth contact hole CT5 can be omitted from the third electrode 230_8 and the fourth electrode 240_8. The third electrode 230_8 and the fourth electrode 240_8 can be connected to the first connecting electrode CE1_8 and the second connecting electrode CE2_8 connected to the first electrode 210_8 and the second electrode 220_8, and the alignment signal can be transmitted via the first connecting electrode CE1_8 and the second connecting electrode CE2_8. That is, the connecting electrodes CE1_8 and CE2_8 can be used to transmit the alignment signal to other electrodes.

[0269] like Figure 24As shown, the first connecting electrode CE1_8 can be connected to the first electrode 210_8 and the third electrode 230_8. For example, the first connecting electrode CE1_8 can be directly connected to the first short side SS1 of the first electrode 210_8 and a short side of the third electrode 230_8 facing the second direction DR2. When an alignment signal is transmitted through the first electrode 210_8, the first connecting electrode CE1_8 can transmit the alignment signal to the third electrode 230_8. Similarly, the second connecting electrode CE2_8 can be connected to the second electrode 220_8 and the fourth electrode 240_8. For example, the second connecting electrode CE2_8 can be directly connected to the fourth short side SS4 of the second electrode 220_8 and a short side of the fourth electrode 240_8 facing the first direction DR1. When an alignment signal is transmitted through the second electrode 220_8, the second connecting electrode CE2_8 can transmit the alignment signal to the fourth electrode 240_8. Even if an alignment signal is applied only through the first voltage line VL1 and the first alignment line AL1, an electric field can be generated between electrodes 210_8, 220_8, 230_8, and 240_8 through the first connecting electrode CE1_8 and the second connecting electrode CE2_8. Due to the electric field, the light-emitting element 300 can be disposed between electrodes 210_8, 220_8, 230_8, and 240_8.

[0270] After that, as Figure 25 As shown, connecting electrodes CE1_8 and CE2_8 are disconnected from the corresponding electrodes 210_8, 220_8, 230_8 and 240_8. Figure 25 (Part of "CB" in the text). The first connecting electrode CE1_8 can be disconnected from the first electrode 210_8 and the third electrode 230_8 to form Figure 23 The first floating pattern FE1_8, and the second connecting electrode CE2_8 can be disconnected from the second electrode 220_8 and the fourth electrode 240_8 to form Figure 23 The second floating pattern FE2_8. After the light-emitting element 300 is set, the connecting electrodes CE1_8 and CE2_8 can be patterned to disconnect from the corresponding electrodes 210_8, 220_8, 230_8 and 240_8, and can remain in a floating state.

[0271] As described above, after aligning the light-emitting element 300, a process can be performed to partially disconnect the alignment lines. When each of the electrode units EU_8 includes a third electrode 230_8 and a fourth electrode 240_8 and thus includes a greater number of alignment lines, line contact holes are formed in the non-light-emitting area. Figure 8 The area of ​​"CLT" in the diagram will increase. However, as... Figure 24As shown, after the alignment signal is transmitted through the connecting electrodes CE1_8 and CE2_8 to the electrodes other than the first electrode 210_8 and the second electrode 220_8, the third electrode 230_8 and the fourth electrode 240_8 can be disconnected from the first electrode 210_8 and the second electrode 220_8 on the first planarization layer 109, and the line contact hole CLT can be formed only on the portion of the first alignment line AL1 in which it is located.

[0272] Simultaneously, when the connecting electrodes CE1_8 and CE2_8 are disconnected to form the floating patterns FE1_8 and FE2_8, the portions connecting electrodes CE1_8 and CE2_8 can remain in a state where they are connected to one of the short sides of electrodes 210_8, 220_8, 230_8, and 240_8. For example... Figure 23 As shown, the display device 10_8 according to one embodiment may include a plurality of electrode segments ES1_8, ES2_8, ES3_8 and ES4_8 respectively formed on at least one short side of electrodes 210_8, 220_8, 230_8 and 240_8.

[0273] Multiple electrode segments ES1_8, ES2_8, ES3_8, and ES4_8 may include a first electrode segment ES1_8 connected to a first electrode 210_8, a second electrode segment ES2_8 connected to a second electrode 220_8, a third electrode segment ES3_8 connected to a third electrode 230_8, and a fourth electrode segment ES4_8 connected to a fourth electrode 240_8. The first electrode segment ES1_8 may be connected to a first short side SS1 of the first electrode 210_8 to form a shape in which a portion of the first short side SS1 protrudes in the second direction DR2. The third electrode segment ES3_8 may be connected to a short side of the third electrode 230_8 facing the second direction DR2, and said short side of the third electrode 230_8 may protrude further than the short side of the fourth electrode 240_8 facing the second direction DR2. The first electrode segment ES1_8 and the third electrode segment ES3_8 can both be retained as traces of the first connecting electrode CE1_8, and can be spaced apart from the first floating pattern FE1_8 and facing the first floating pattern FE1_8 on the second direction DR2.

[0274] Similarly, the second electrode segment ES2_8 can be connected to the fourth short side SS4 of the second electrode 220_8, such that the fourth short side SS4 can protrude further in the first direction DR1 than the short side of the third electrode 230_8 facing the first direction DR1. The fourth electrode segment ES4_8 can be connected to a short side of the fourth electrode 240_8 facing the first direction DR1, and said short side of the fourth electrode 240_8 can protrude further than the short side of the third electrode 230_8 facing the first direction DR1. Both the second electrode segment ES2_8 and the fourth electrode segment ES4_8 can remain as traces of the second connecting electrode CE2_8, and can be spaced apart from and facing the second floating pattern FE2_8 in the first direction DR1.

[0275] However, the present invention is not limited thereto. In some cases, the electrode fragment ES can be removed and may not be retained in the display device 10.

[0276] Figure 26 This is a plan view showing a sub-pixel of a display device according to another embodiment.

[0277] Reference Figure 26 In the display device 10_9 according to one embodiment, electrode segments can be removed. After the light-emitting element 300 is provided, during the process of patterning and connecting electrodes, the electrode segments ES can be removed so as not to remain, depending on the process conditions. Figure 26 Implementation examples and Figure 25 The difference in this embodiment is that the electrode segment ES is removed, and only the floating patterns FE1_9 and FE2_9 are provided. Since the following description is repetitive, its detailed description will be omitted.

[0278] In summarizing the detailed description, those skilled in the art will understand that many variations and modifications can be made to the preferred embodiments without substantially departing from the principles of the invention. Therefore, the preferred embodiments disclosed in the invention are used only in a general and descriptive sense and not for limiting purposes.

Claims

1. A display device, the display device comprising: The substrate consists of multiple pixels; An electrode unit is disposed in each of the plurality of pixels of the substrate and includes a first electrode and a second electrode. The first electrode includes a first outer edge having a center of curvature and a curved shape, and the second electrode includes a second outer edge having a curved shape corresponding to the first outer edge and is spaced apart from and facing the first electrode. as well as Multiple light-emitting elements are disposed between the first electrode and the second electrode. The first electrode is configured such that the center of curvature is located on the outer periphery of the pixel and the first outer edge faces the center of the pixel.

2. The display device according to claim 1, wherein, The electrode unit includes a first type of electrode unit. In the first type of electrode unit, the first electrode further includes a first short side extending in a first direction and a second short side extending in a second direction intersecting the first direction. The second short side has a side connected to one side of the first short side, and a first outer side connects the other side of the first short side to the other side of the second short side. In the first electrode of the first type of electrode unit, the center of curvature of the first outer side is located on one side of the first short side.

3. The display device according to claim 2, wherein, The second electrode further includes: a third outer side having a curved shape corresponding to the second outer side; a third short side extending in a first direction and connecting one side of the second outer side to one side of the third outer side; and a fourth short side extending in a second direction and connecting the other side of the second outer side to the other side of the third outer side.

4. The display device according to claim 3, wherein, The electrode unit includes a first electrode unit and a second electrode unit. In the first electrode unit, the curvature center of the first outer edge is located on one side of the pixel, and in the second electrode unit, the curvature center of the first outer edge is located on the other side of the pixel.

5. The display device according to claim 4, wherein, The second electrode of the first electrode unit is directly connected to the second electrode of the second electrode unit.

6. The display device according to claim 4, further comprising: A bridging electrode is disposed in a pixel and has one side connected to a first electrode of a first electrode unit and the other side connected to a second electrode of a second electrode unit.

7. The display device according to claim 3, wherein, The second electrode also includes an electrode protrusion protruding from a portion of its third outer edge.

8. The display device according to claim 2, wherein, The electrode unit also includes a third electrode disposed between the first electrode and the second electrode, and a fourth electrode disposed between the third electrode and the first electrode. The third electrode has a curved shape corresponding to the second outer edge of the second electrode, and The fourth electrode has a curved shape corresponding to the first outer edge of the first electrode.

9. The display device according to claim 8, wherein, The third and fourth electrodes are positioned spaced apart from each other and facing each other, and Some of the plurality of light-emitting elements are disposed between the third electrode and the fourth electrode.

10. The display device according to claim 8, further comprising: The first floating pattern has a shape extending in a first direction and includes a portion that is spaced apart from the first short side of the first electrode and the third electrode in a second direction; as well as The second floating pattern has a shape extending in a second direction and includes a portion that is spaced apart from the fourth short side of the second electrode and the fourth electrode in a first direction.

11. The display device according to claim 2, wherein, The electrode unit also includes a second type of electrode unit, in which the first electrode includes a fifth short side extending in a first direction, and a first outer side connecting both sides of the fifth short side. In the first electrode of the second type of electrode unit, the curvature center of the first outer side is located between the two sides of the fifth short side.

12. The display device according to claim 2, wherein, The electrode unit also includes a third type of electrode unit, in which the first electrode has a circular shape.

13. The display device according to claim 1, further comprising: A first contact electrode is disposed on a first electrode and includes a side that bends along a first outer edge; as well as The second contact electrode is disposed on the second electrode and includes a side that bends along the second outer edge. The first contact electrode is in contact with one end of the light-emitting element and the first electrode, and The second contact electrode is in contact with the other end of the light-emitting element and the second electrode.

14. The display device according to claim 13, wherein, The first separation distance between the first outer edge of the first electrode and the second outer edge of the second electrode is greater than the second separation distance between the first contact electrode and the second contact electrode.

15. A display device, comprising: Multiple first electrodes, each including a first short side and a second short side and a first outer side, the first short side and the second short side extending in directions intersecting each other and having one side connected to each other, the first outer side having a curved shape and connecting the other side of the first short side to the other side of the second short side; A plurality of second electrodes, each of which is configured to be spaced apart from and facing the first outer edge of the first electrode, and includes a second outer edge having a curved shape corresponding to the first outer edge; as well as Multiple light-emitting elements are disposed between the first electrode and the second electrode. The plurality of light-emitting elements are disposed between the first outer edge and the second outer edge, and are arranged along the curvature of the first outer edge.

16. The display device according to claim 15, further comprising a third electrode disposed between the first electrode and the second electrode, and a fourth electrode disposed between the third electrode and the first electrode. in, The third electrode has a curved shape corresponding to the second outer edge of the second electrode, and The fourth electrode has a curved shape corresponding to the first outer edge of the first electrode.

17. The display device according to claim 16, further comprising: A first contact electrode is disposed on a first electrode and includes a side that bends along a first outer edge; as well as The second contact electrode is disposed on the second electrode and includes a side that bends along the second outer edge.

18. The display device according to claim 16, wherein, The first outer edge and the second outer edge have the same center of curvature. At least some of the plurality of first electrodes have different centers of curvature, and At least some of the plurality of second electrodes have different centers of curvature.

19. The display device according to claim 18, wherein, At least some of the plurality of second electrodes, which have different centers of curvature, are directly connected to each other.

20. The display device according to claim 18, further comprising: A bridging electrode connects the first electrode to a second electrode having a curvature center different from that of the first electrode.

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