Display device

Abstract

A display device is provided. The display device includes: a substrate; a first inner bank and a second inner bank disposed on the substrate and spaced apart from each other; a first electrode disposed on a portion of the first inner bank; a second electrode disposed to cover the second inner bank; and a light-emitting element disposed between the first electrode and the second electrode, wherein one end of the light-emitting element does not overlap with the first electrode in a thickness direction, and the other end of the light-emitting element overlaps with the second electrode in the thickness direction.

Description

Technical Field

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

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

[0003] A display device is a device for displaying images and includes a display panel (such as an organic light-emitting display panel or a liquid crystal display panel). The light-emitting display panel may include a light-emitting element (e.g., a light-emitting diode (LED)). Examples of the light-emitting diode include an organic light-emitting diode (OLED) using an organic material as a fluorescent material and an inorganic light-emitting diode using an inorganic material as a fluorescent material. Summary of the Invention

[0004] Technical issues

[0005] Aspects of the present disclosure provide a display device including electrodes having different widths and a light emitting element disposed between the electrodes.

[0006] Aspects of the present disclosure also provide a display device, wherein a separation distance between electrodes is greater than a separation distance between one electrode and a voltage line.

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

[0008] Technical Solution

[0009] According to a disclosed embodiment, a display device includes: a substrate; a first inner bank and a second inner bank, which are arranged on the substrate to be spaced apart from each other; a first electrode and a second electrode, the first electrode being arranged on a partial area of the first inner bank and the second electrode being arranged to cover the second inner bank; and a light-emitting element being arranged between the first electrode and the second electrode, wherein one end of the light-emitting element does not overlap with the first electrode in a thickness direction, and the other end of the light-emitting element overlaps with the second electrode in the thickness direction.

[0010] The display device may further include a first contact electrode in contact with the first electrode and one end portion of the light emitting element, and a second contact electrode in contact with the second electrode and the other end portion of the light emitting element.

[0011] One end portion of the light emitting element may overlap the first contact electrode in the thickness direction, and the other end portion of the light emitting element may overlap the second contact electrode in the thickness direction.

[0012] A separation distance between the first electrode and the second electrode may be greater than a separation distance between the first inner bank and the second inner bank.

[0013] The first inner bank may include one side and another side facing the second inner bank, and the first electrode may be provided to cover only the one side of the first inner bank.

[0014] The second electrode may be disposed to cover one side of the second inner bank facing the first inner bank and the other side of the second inner bank.

[0015] The display device may further include at least one third inner bank disposed between the first inner bank and the second inner bank, and at least one third electrode disposed between the first electrode and the second electrode, wherein the third electrode may be disposed on a partial region of the third inner bank.

[0016] The third inner bank may include one side facing the first inner bank and the other side facing the second inner bank, and the third electrode may be provided to cover only the one side of the third inner bank.

[0017] The display device may further include a third contact electrode disposed on the third electrode, wherein a width of the third contact electrode measured in one direction may be greater than a width of the third electrode measured in the one direction.

[0018] The third contact electrode may be in contact with the light emitting element disposed between the first electrode and the third electrode and the light emitting element disposed between the third electrode and the second electrode.

[0019] The display device may further include a first voltage line disposed on the substrate and a first insulating layer disposed to cover the first voltage line, wherein the first inner bank and the second inner bank may be directly disposed on the first insulating layer.

[0020] At least a partial region of the first voltage line may be disposed to overlap the first inner bank in a thickness direction, and a separation distance between the second electrode and the first electrode may be greater than a separation distance between the second electrode and the first voltage line.

[0021] The first inner bank may include one side on which the first electrode is disposed and the other side on which the first electrode may not be disposed and which overlaps the first voltage line in a thickness direction.

[0022] The display device may further include a second insulating layer configured to cover the other side of the first inner bank and a side of the second electrode facing the first electrode, wherein the light emitting element may be provided on the second insulating layer.

[0023] According to a disclosed embodiment, a display device includes: a substrate; a data conductive layer, which is arranged on the substrate and includes a first voltage line; a first insulating layer, which is arranged to cover the data conductive layer; a first electrode and a second electrode, which are arranged on the first insulating layer to be spaced apart from each other and face each other; and a light-emitting element, which is arranged between the first electrode and the second electrode, wherein the horizontal distance between the first electrode and the second electrode can be larger than the horizontal distance between the second electrode and the first voltage line.

[0024] The display device may also include a first inner bank arranged on the first insulating layer and a second inner bank spaced apart from the first inner bank and facing the first inner bank, wherein the first electrode may be arranged to cover one side of the first inner bank, and the second electrode may be arranged to cover one side of the second inner bank facing the first inner bank and the other side of the second inner bank.

[0025] The first voltage line may overlap the other side of the first inner bank facing the second inner bank in the thickness direction.

[0026] The display device may further include a first contact electrode in contact with the first electrode and one end of the light-emitting element, and a second contact electrode in contact with the second electrode and the other end of the light-emitting element, wherein one end of the light-emitting element may not overlap with the first electrode in the thickness direction, and the other end of the light-emitting element may overlap with the second electrode in the thickness direction.

[0027] The data conductive layer may further include a second voltage line different from the first voltage line, the first voltage line may be electrically connected to the first electrode, and the second voltage line may be electrically connected to the second electrode.

[0028] The display device may further include a third electrode disposed between the first electrode and the second electrode and a third voltage line disposed between the first voltage line and the second voltage line, wherein a horizontal distance between the second electrode and the third electrode may be greater than a horizontal distance between the second electrode and the third voltage line.

[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 electrodes having different widths, and the separation distance between the electrodes may be greater than the separation distance between a voltage line to which an alignment signal is applied and one of the electrodes. During a manufacturing process of the display device, the intensity of the electric field formed between the electrode and the voltage line is greater than the intensity of the electric field formed between the electrodes, and a light-emitting element may be disposed between the electrodes using the stronger electric field.

[0032] Therefore, in the display device according to one embodiment, the light emitting elements can be disposed between the electrodes with a high degree of alignment.

[0033] Effects according to the embodiments are not limited to the above-exemplified contents, and more various effects are included in the present disclosure. BRIEF DESCRIPTION OF THE DRAWINGS

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

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

[0036] Figure 3 It is along Figure 2 A cross-sectional view taken along line II'.

[0037] Figure 4 is a schematic diagram of a light emitting element according to an embodiment.

[0038] Figure 5 is a cross-sectional view illustrating a portion of a manufacturing process of a display device according to one embodiment.

[0039] Figure 6 is a plan view illustrating a portion of a manufacturing process of a display device according to one embodiment.

[0040] Figure 7 and Figure 8 is a cross-sectional view illustrating a portion of a manufacturing process of a display device according to one embodiment.

[0041] Figure 9 is a plan view illustrating a portion of a manufacturing process of a display device according to one embodiment.

[0042] Figures 10 to 15 is a cross-sectional view illustrating a portion of a manufacturing process of a display device according to one embodiment.

[0043] Figure 16 is a cross-sectional view illustrating a portion of a display device according to another embodiment.

[0044] Figure 17 and Figure 18 It shows Figure 16 A cross-sectional view of a portion of a manufacturing process of a display device.

[0045] Figure 19 is a plan view showing one sub-pixel of a display device according to still another embodiment.

[0046] Figure 20 It shows Figure 19 A cross-sectional view of a portion of a display device.

[0047] Figures 21 to 26 It shows Figure 19 A cross-sectional view and a plan view of a portion of a manufacturing process of a display device.

[0048] Figure 27 is a plan view showing one sub-pixel of a display device according to still another embodiment.

[0049] Figure 28 is a plan view showing one sub-pixel of a display device according to still another embodiment.

[0050] Figure 29 is a plan view showing one sub-pixel of a display device according to still another embodiment.

[0051] Figure 30 It is along Figure 29 A cross-sectional view taken along line II-II'. DETAILED DESCRIPTION

[0052] The invention will now be described more fully hereinafter with reference to the accompanying drawings, in which preferred embodiments of the invention are shown. However, the invention can be embodied in different 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.

[0053] It will also be understood that when a layer is referred to as being “on” another layer or substrate, it can be directly on the other layer or substrate, or intervening layers may also be present. Throughout the specification, like reference numerals refer to like components.

[0054] 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, the first element discussed below may be referred to as the second element without departing from the teachings of the invention. Similarly, the second element may also be referred to as the first element.

[0055] Hereinafter, embodiments will be described with reference to the accompanying drawings.

[0056] Figure 1 is a schematic plan view of a display device according to an embodiment.

[0057] Reference Figure 1The display device 10 displays a video or still image. The display device 10 may refer to any electronic device that provides a display screen. For example, the display device 10 may include a television, notebook, monitor, billboard, Internet of Things (IoT) device, mobile phone, smartphone, tablet personal computer (PC), electronic watch, smartwatch, watch phone, head-mounted display, mobile communication terminal, electronic organizer, e-book reader, portable multimedia player (PMP), navigation device, game console, digital camera, camcorder, etc. that provides a display screen.

[0058] The display device 10 includes a display panel that provides a display screen. Examples of the display panel include a light-emitting diode (LED) display panel, an organic light-emitting display panel, a quantum dot light-emitting display panel, a plasma display panel, and a field emission display panel. Hereinafter, although an example in which an LED display panel is applied as an example of a display panel is described, the present invention is not limited thereto and can be applied to other display panels when the same technical spirit is applicable.

[0059] The shape of the display device 10 can be modified in various ways. For example, the display device 10 can have a rectangular shape with its horizontal sides being long, a rectangular shape with its longitudinal sides being long, a square shape, a quadrilateral shape with its corners (vertices) being rounded, other polygonal shapes, and a circular shape. 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 display device 10 and the display area DPA are shown, and the display device 10 and the display area DPA have a rectangular shape with its lateral sides being long.

[0060] The display device 10 may include a display area DPA and a non-display area NDA. The display area DPA is an area where an image can be displayed, and the non-display area NDA is an area where no image is displayed. The display area DPA may be referred to as an active area, and the non-display area NDA may be referred to as an inactive area. The display area DPA may generally occupy the center of the display device 10.

[0061] A plurality of pixels PX may be arranged in the display area DPA. The plurality of pixels PX may be arranged in a matrix shape. The shape of each of the pixels PX may be a rectangular shape or a square shape in a plan view, but the present invention is not limited thereto, and the shape may be a diamond shape in which each side thereof is inclined relative to one direction. The pixels PX may be alternately arranged in a stripe type or a PenTile type. In addition, each of the pixels PX may include one or more light emitting elements 300 (see FIG. 1 ) that emit light within a specific wavelength range. Figure 3 ), thereby displaying a specific color.

[0062] The non-display area NDA may be disposed around the display area DPA. The non-display area NDA may completely or partially surround the display area DPA. The display area DPA has a rectangular shape, and the non-display area NDA may be disposed adjacent to four sides of the display area DPA. The non-display area NDA may constitute a frame of the display device 10.

[0063] Figure 2 is a schematic plan view showing one pixel of a display device according to one embodiment. Figure 3 It is along Figure 2 A cross-sectional view taken along line II'.

[0064] Reference Figure 2 and Figure 3 , each of the plurality of pixels PX may include a first sub-pixel PX1, a second sub-pixel PX2, and a third sub-pixel PX3. The first sub-pixel PX1 may emit light of a first color, the second sub-pixel PX2 may emit light of a second color, and the third sub-pixel PX3 may emit light of a third color. The first color may be blue, the second color may be green, and the third color may be red. However, the present invention is not limited thereto, and the sub-pixels PXn may emit light having the same color. In addition, in Figure 2 , the pixel PX is shown to include three sub-pixels PXn, but is not limited thereto and may include a greater number of sub-pixels PXn.

[0065] Each of the sub-pixels PXn of the display device 10 may include an area defined as a light emitting area EMA. The first sub-pixel PX1 may include a first light emitting area EMA1, the second sub-pixel PX2 may include a second light emitting area EMA2, and the third sub-pixel PX3 may include a third light emitting area EMA3. The light emitting area EMA may be defined as an area in which the 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 FIG. 2 ). Figure 4 ), and the active layer 330 can emit light within a specific wavelength range and without directionality. Light emitted from the active layer 330 of the light-emitting element 300 can also be emitted in a direction toward the side surfaces of the light-emitting element 300, including both ends thereof. The light-emitting area EMA can include the area in which the light-emitting element 300 is disposed, and can also include an area adjacent to the light-emitting element 300 and through which light emitted from the light-emitting element 300 is emitted.

[0066] In addition, the present invention is not limited thereto, and the emission area EMA may further include an area in which light emitted from the light emitting element 300 is reflected or refracted by another member to be emitted. A plurality of light emitting elements 300 may be provided in each sub-pixel PXn, and the area in which the light emitting element 300 is provided and an area adjacent to the area may form the emission area EMA.

[0067] Although not shown in the drawings, each of the sub-pixels PXn of the display device 10 may include a non-luminous region defined as a region other than the luminous region EMA. The non-luminous region may be a region where the light emitting element 300 is not provided and where light emitted from the light emitting element 300 cannot reach and thus cannot emit light.

[0068] Figure 3 Only shown Figure 2 1 is a cross-section of the first sub-pixel PX1, but the cross-section can be similarly applied to other pixels PX or sub-pixels PXn. Figure 3 Shown is a cross-section set Figure 2 FIG. 1 is a cross-section of one end and the other end of the light-emitting element 300 in the first sub-pixel PX1.

[0069] The display device 10 may include a circuit element layer and a display element layer disposed on a first substrate 110. A semiconductor layer, a plurality of conductive layers, and a plurality of insulating layers are disposed on the first substrate 110. 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 insulating layer 200 to form the circuit element layer, and electrodes and contact electrodes disposed on the first insulating layer 200 to form the display element layer. The plurality of insulating layers may include a buffer layer 115, a first gate insulating layer 130, a first protective layer 150, a first interlayer insulating layer 170, a second interlayer insulating layer 180, a first insulating layer 200, a second insulating layer 510, a third insulating layer 520, a fourth insulating layer 530, and a fifth insulating layer 550, among others.

[0070] The circuit element layer may include circuit elements and multiple lines for driving the light-emitting element 300 (such as a first transistor 120, a second transistor 140, multiple voltage lines 191 and 192, and a first conductive pattern 196), and the display element layer may include the light-emitting element 300, and include a first electrode 210, a second electrode 220, a first contact electrode 261, a second contact electrode 262, etc.

[0071] The first substrate 110 may be an insulating substrate. The first substrate 110 may be made of an insulating material such as glass, quartz, polymer resin, etc. In addition, the first substrate 110 may be a rigid substrate, but may also be a flexible substrate that is bendable, foldable, rollable, etc.

[0072] Light-blocking layers BML1 and BML2 may be disposed on the first substrate 110. The light-blocking layer BML 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 disposed so as to overlap the first active material layer 126 of the first transistor 120 and the second active material layer 146 of the second transistor 140, respectively. The first light-blocking layer BML1 and the second light-blocking layer BML2 may include a light-blocking material to prevent light from being incident on the first active material layer 126 and the second active material layer 146. 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 present invention is not limited thereto, and in some cases, the light-blocking layers BML1 and BML2 may be omitted. Although not shown in the drawings, the first light-blocking layer BML1 may be electrically connected to the first source / drain electrode 123 of the first transistor 120, which will be described below, and the second light-blocking layer BML2 may be electrically connected to the first source / drain electrode 143 of the second transistor 140.

[0073] The buffer layer 115 may be completely disposed on the first substrate 110 on which the light blocking layers BML1 and BML2 are formed. The buffer layer 115 may be formed on the first substrate 110 to protect the transistors 120 and 140 of the pixel PX from moisture penetrating through the first substrate 110, which is susceptible to moisture penetration, and may perform a surface planarization function. The buffer layer 115 may be formed of a plurality of inorganic layers alternately stacked. For example, the buffer layer 115 may be formed of silicon oxide (SiO x ) layer, silicon nitride (SiN x ) layer and a silicon oxynitride (SiON) layer are alternately stacked in a plurality of layers.

[0074] The semiconductor layer is disposed on the buffer layer 115. The semiconductor layer may include a first active material layer 126 of the first transistor 120 and a second active material layer 146 of the second transistor 140. The first active material layer 126 and the second active material layer 146 may be disposed to partially overlap gate electrodes 121 and 141 of a first gate conductive layer to be described below.

[0075] In exemplary embodiments, the semiconductor layer may include polycrystalline silicon, single crystal silicon, an oxide semiconductor, or the like. Polycrystalline silicon may be formed by crystallizing amorphous silicon. Examples of crystallization methods include rapid thermal annealing (RTA), solid phase crystallization (SPC), excimer laser annealing (ELA), metal-induced lateral crystallization (MILC), and sequential lateral solidification (SLS), but the present invention is not limited thereto. As another example, the first active material layer 126 and the second active material layer 146 may include single crystal silicon, low-temperature polycrystalline silicon, amorphous silicon, or the like. When the semiconductor layer includes polycrystalline silicon, the first active material layer 126 may include a first doped region 126 a, a second doped region 126 b, and a first channel region 126 c. The first channel region 126 c may be disposed between the first doped region 126 a and the second doped region 126 b. The second active material layer 146 may include a third doped region 146 a, a fourth doped region 146 b, and a second channel region 146 c. The second channel region 146c may be disposed between the third doping region 146a and the fourth doping region 146b. The first doping region 126a, the second doping region 126b, the third doping region 146a, and the fourth doping region 146b may be regions in which portions of the first and second active material layers 126 and 146 are doped with impurities.

[0076] However, the first active material layer 126 and the second active material layer 146 are not necessarily limited to the above description. In an exemplary embodiment, the first active material layer 126 and the second active material layer 146 may include an oxide semiconductor. In this case, the first doped region 126a and the third doped region 146a may be first conductive regions, and the second doped region 126b and the fourth doped region 146b may be second conductive regions. When the first active material layer 126 and the second active material layer 146 include an oxide semiconductor, the oxide semiconductor may be an oxide semiconductor including indium (In). In some embodiments, the oxide semiconductor may include indium tin oxide (ITO), indium zinc oxide (IZO), indium gallium oxide (IGO), indium zinc tin oxide (IZTO), indium gallium tin oxide (IGTO), indium gallium zinc tin oxide (IGZTO), etc. However, the present invention is not limited to this.

[0077] The first gate insulating layer 130 is provided on the semiconductor layer and the buffer layer 115. The first gate insulating layer 130 may be provided on the buffer layer 115 on which the semiconductor layer is formed. The first gate insulating layer 130 may serve as a gate insulating film of the first transistor 120 and the second transistor 140. The first gate insulating layer 130 may be made of a material such as silicon oxide (SiO x ), silicon nitride (SiN x ) or silicon oxide (SiO x ) and silicon nitride (SiNx ) is made of inorganic materials with a stacked structure.

[0078] A first gate conductive layer is disposed on the first gate insulating layer 130. The first gate conductive layer may include a first gate electrode 121 of the first transistor 120 and a second gate electrode 141 of the second transistor 140. The first gate electrode 121 is disposed so as to overlap at least a portion of the first active material layer 126, and the second gate electrode 141 is disposed so as to overlap at least a portion of the second active material layer 146. For example, the first gate electrode 121 may be disposed so as to overlap the first channel region 126 c of the first active material layer 126 in the thickness direction, and the second gate electrode 141 may be disposed so as to overlap the second channel region 146 c of the second active material layer 146 in the thickness direction.

[0079] The first gate conductive layer may be formed of a single layer or multiple layers made of one of molybdenum (Mo), aluminum (Al), chromium (Cr), gold (Au), titanium (Ti), nickel (Ni), neodymium (Nd), and copper (Cu), or an alloy thereof. However, the present invention is not limited thereto.

[0080] The first protective layer 150 is provided on the first gate conductive layer. The first protective layer 150 may be provided to cover the first gate conductive layer to perform the function of protecting the first gate conductive layer. The first protective layer 150 may be made of silicon oxide (SiO x ), silicon nitride (SiN x ) or silicon oxide (SiO x ) and silicon nitride (SiN x ) is formed by an inorganic material with a stacked structure.

[0081] The second gate conductive layer is disposed on the first protective layer 150. The second gate conductive layer may include a first capacitor electrode 160 of a storage capacitor. The first capacitor electrode 160 is disposed so that at least a portion thereof overlaps the first gate electrode 121 in the thickness direction. The first capacitor electrode 160 and the first gate electrode 121 may overlap each other in the thickness direction, with the first protective layer 150 interposed therebetween. The first capacitor electrode 160, the first gate electrode 121, and the first protective layer 150 may form a storage capacitor. The second gate conductive layer may be formed of a single layer or multiple layers made of one of molybdenum (Mo), aluminum (Al), chromium (Cr), gold (Au), titanium (Ti), nickel (Ni), neodymium (Nd), and copper (Cu), or alloys thereof. However, the present invention is not limited thereto.

[0082] The first interlayer insulating layer 170 is provided on the second gate conductive layer. The first interlayer insulating layer 170 may be used as an insulating film between the second gate conductive layer and other layers provided thereon. The first interlayer insulating layer 170 may be made of, for example, silicon oxide (SiO x ), silicon nitride (SiN x ) or silicon oxide (SiO x ) and silicon nitride (SiN x ) is made of inorganic materials with a stacked structure.

[0083] The first data conductive layer is disposed on the first interlayer insulating layer 170. The first data conductive layer may include the first and second source / drain electrodes 123 and 124 of the first transistor 120 and the first and second source / drain electrodes 143 and 144 of the second transistor 140.

[0084] The first source / drain electrode 123 and the second source / drain electrode 124 of the first transistor 120 may respectively contact the first doped region 126 a and the second doped region 126 b of the first active material layer 126 through contact holes penetrating the first interlayer insulating layer 170, the first protective layer 150, and the first gate insulating layer 130. The first source / drain electrode 143 and the second source / drain electrode 144 of the second transistor 140 may respectively contact the third doped region 146 a and the fourth doped region 146 b of the second active material layer 146 through contact holes penetrating the first interlayer insulating layer 170, the first protective layer 150, and the first gate insulating layer 130. In addition, the first source / drain electrode 123 of the first transistor 120 and the first source / drain electrode 143 of the second transistor 140 may respectively be electrically connected to the first light-blocking layer BML1 and the second light-blocking layer BML2 through other contact holes. Meanwhile, in the first source / drain electrode 123 and the second source / drain electrode 124 of the first transistor 120 and the first source / drain electrode 143 and the second source / drain electrode 144 of the second transistor 140, when one electrode is a source electrode, the other electrode may be a drain electrode. However, the present invention is not limited thereto, and in the first source / drain electrodes 123 and 143 and the second source / drain electrodes 124 and 144, when one electrode is a drain electrode, the other electrode may be a source electrode.

[0085] The first data conductive layer may be formed of a single layer or multiple layers made of one of molybdenum (Mo), aluminum (Al), chromium (Cr), gold (Au), titanium (Ti), nickel (Ni), neodymium (Nd), and copper (Cu), or an alloy thereof. However, the present invention is not limited thereto.

[0086] The second interlayer insulating layer 180 may be disposed on the first data conductive layer. The second interlayer insulating layer 180 may be completely disposed on the first interlayer insulating layer 170 while covering the first data conductive layer and may be used to protect the first data conductive layer. In addition, the second interlayer insulating layer 180 may serve as an insulating film between the first data conductive layer and the second data conductive layer disposed thereon. The second interlayer insulating layer 180 may be made of, for example, silicon oxide (SiO x ), silicon nitride (SiN x ) or silicon oxide (SiO x ) and silicon nitride (SiN x ) is made of inorganic materials with a stacked structure.

[0087] A second data conductive layer is provided on the second interlayer insulating layer 180. The second data conductive layer may include a first voltage line 191, a second voltage line 192, and a first conductive pattern 196. A high potential voltage (first power supply voltage VDD) to be supplied to the first transistor 120 may be applied to the first voltage line 191, and a low potential voltage (second power supply voltage VSS) to be supplied to the second electrode 220 (described below) may be applied to the second voltage line 192. Furthermore, as will be described below, the first voltage line 191 and the second voltage line 192 may be used to align the light-emitting element 300 during the manufacturing process of the display device 10.

[0088] The first conductive pattern 196 can be electrically connected to the first source / drain electrode 123 of the first transistor 120 through a contact hole formed in the second interlayer insulating layer 180. The first conductive pattern 196 can also be electrically connected to the first electrode 210, which will be described below. The first transistor 120 can transmit the first power supply voltage VDD applied from the first voltage line 191 to the first electrode 210 through the first conductive pattern 196. Meanwhile, in the drawings, the second data conductive layer is shown as including one first voltage line 191 and one second voltage line 192, but the present invention is not limited thereto. The second data conductive layer may include a larger number of first voltage lines 191 and a larger number of second voltage lines 192.

[0089] The second data conductive layer may be formed of a single layer or multiple layers made of one of molybdenum (Mo), aluminum (Al), chromium (Cr), gold (Au), titanium (Ti), nickel (Ni), neodymium (Nd), and copper (Cu), or an alloy thereof. However, the present invention is not limited thereto.

[0090] The first insulating layer 200 is disposed on the second data conductive layer. The first insulating layer 200 may include an organic insulating material and perform a surface planarization function.

[0091] Inner banks 410 and 420, multiple electrodes 210 and 220, outer banks 450, multiple contact electrodes 261 and 262, and light emitting element 300 are disposed on first insulating layer 200. In addition, multiple insulating layers 510, 520, 530, and 550 may be further disposed on first insulating layer 200.

[0092] The inner banks 410 and 420 are directly disposed on the first insulating layer 200. The inner banks 410 and 420 may include a first inner bank 410 and a second inner bank 420 disposed adjacent to a central portion of each pixel PX or sub-pixel PXn.

[0093] The first inner bank 410 and the second inner bank 420 may be arranged to be spaced apart from each other and facing each other in the first direction DR1. Furthermore, the first inner bank 410 and the second inner bank 420 may extend in the second direction DR2 and may be spaced apart from each other and terminate at the boundary between subpixels PXn so as not to extend to another adjacent subpixel PXn in the second direction DR2. Therefore, the first inner bank 410 and the second inner bank 420 may be arranged in each subpixel PXn to form a pattern across the entire surface of the display device 10. By arranging the inner banks 410 and 420 to be spaced apart from each other and facing each other, a region in which the light-emitting element 300 is disposed may be formed between the inner banks 410 and 420. While the drawings illustrate the provision of one first inner bank 410 and one second inner bank 420, the present invention is not limited thereto. In some cases, each of the inner banks 410 and 420 may be provided in plurality, or may be further provided with a greater number of additional inner banks 410 and 420 depending on the number of electrodes 210 and 220 described below.

[0094] In addition, each of the first inner bank 410 and the second inner bank 420 may have a structure in which at least a portion of the first inner bank 410 and the second inner bank 420 protrudes relative to the upper surface of the first insulating layer 200. The protruding portion of each of the first inner bank 410 and the second inner bank 420 may have an inclined side surface, and light emitted from the light-emitting element 300 disposed between the first inner bank 410 and the second inner bank 420 may travel toward the inclined side surfaces of the inner banks 410 and 420. As will be described below, when the electrodes 210 and 220 disposed on the inner banks 410 and 420, respectively, include a material having a high reflectivity, light emitted from the light-emitting element 300 may be reflected from the side surfaces of the inner banks 410 and 420 to be emitted in an upward direction relative to the first substrate 110. That is, the inner banks 410 and 420 may provide a region in which the light-emitting element 300 is disposed, and may also function as a reflective partition wall that reflects light emitted from the light-emitting element 300 upward. In an exemplary embodiment, the inner banks 410 and 420 may include an organic insulating material such as polyimide (PI), but the present invention is not limited thereto.

[0095] The plurality of electrodes 210 and 220 are disposed on the inner banks 410 and 420 and the first insulating layer 200. The plurality of electrodes 210 and 220 may include a first electrode 210 disposed on the first inner bank 410 and a second electrode 220 disposed on the second inner bank 420.

[0096] like Figure 2 As shown in FIG, the first electrode 210 may be provided to extend in the second direction DR2 in each subpixel PXn. The first electrode 210 may not extend to another subpixel PXn adjacent in the second direction DR2 and may be provided to be partially spaced apart from the outer bank 450 surrounding each subpixel PXn. At least a portion of the first electrode 210 is provided to overlap the outer bank 450, which will be described below, and the first electrode 210 may be electrically connected to the first transistor 120 in the region overlapping the outer bank 450. For example, the first electrode 210 may contact the first conductive pattern 196 through a first electrode contact hole CNTD formed in the region overlapping the outer bank 450 and penetrating the first insulating layer 200, and thereby, the first electrode 210 may be electrically connected to the first source / drain electrode 123 of the first transistor 120. The first electrode 210 provided in each subpixel PXn may receive different electrical signals from the corresponding first transistor 120.

[0097] The second electrode 220 may be arranged to extend in the second direction DR2 within each subpixel PXn. Unlike the first electrode 210, the second electrode 220 may be arranged to extend to another adjacent subpixel PXn in the second direction DR2. That is, a plurality of adjacent subpixels PXn in the second direction DR2 may share a single second electrode 220. The second electrode 220 may partially overlap the outer bank 450 at the boundary between adjacent subpixels PXn in the second direction DR2, and the second electrode 220 may be electrically connected to the second voltage line 192 in the region overlapping the outer bank 450. For example, the second electrode 210 may contact the second voltage line 192 via a second electrode contact hole CNTS formed in the region overlapping the outer bank 450 and penetrating the first insulating layer 200. As shown in the drawings, the second electrodes 220 of adjacent subpixels PXn in the first direction DR1 are respectively electrically connected to the second voltage line 192 through the second electrode contact hole CNTS, and the second electrode 220 and the second voltage line 192 may receive the same electrical signal.

[0098] However, the present invention is not limited thereto. In some cases, the second electrode 220 may further include a trunk portion extending in the first direction DR1, and the second electrodes 220 of adjacent sub-pixels PXn in the first direction DR1 may be electrically connected to each other via the trunk portion. In this case, the second electrodes 220 of the plurality of sub-pixels PXn may receive the same electrical signal from the second voltage line 192. In this case, the second electrode 220 may be electrically connected to the second voltage line 192 in the non-display area NDA located at a peripheral portion of the display area DPA in which the plurality of pixels PX or sub-pixels PXn are disposed.

[0099] The first electrode 210 and the second electrode 220 may be disposed on the first inner bank 410 and the second inner bank 420, respectively, and may be spaced apart from each other and face each other in the first direction DR1. A plurality of light-emitting elements 300 may be disposed between the first inner bank 410 and the second inner bank 420, and the light-emitting elements 300 may be disposed between the first electrode 210 and the second electrode 220, and at least one end of the light-emitting element 300 may be electrically connected to the first electrode 210 and / or the second electrode 220.

[0100] The plurality of electrodes 210 and 220 may be electrically connected to the light emitting element 300 and may receive a predetermined voltage to cause the light emitting element 300 to emit light. For example, the plurality of electrodes 210 and 220 may be electrically connected to the light emitting element 300 through contact electrodes 261 and 262 to be described below, and an electrical signal applied to the electrodes 210 and 220 may be transmitted to the light emitting element 300 through the contact electrodes 261 and 262.

[0101] In an exemplary embodiment, the first electrode 210 may be a pixel electrode separated for each sub-pixel PXn, and the second electrode 220 may be a common electrode commonly connected along each sub-pixel PXn. One of the first electrode 210 and the second electrode 220 may be an anode of the light-emitting element 300, and the other of the first electrode 210 and the second electrode 220 may be a cathode of the light-emitting element 300. However, the present invention is not limited thereto and may be reversed from the above description.

[0102] Meanwhile, according to one embodiment, the first electrode 210 and the second electrode 220 may be formed to have different widths. For example, the width of the second electrode 220 measured in the first direction DR1 may be formed to be larger than the width of the second inner bank 420 measured in the first direction DR1, and thus the second electrode 220 may be provided to cover the outer surface of the second inner bank 420. Therefore, a portion of the lower surface of the second electrode 220 may be in contact with the second inner bank 420, and another portion of the lower surface of the second electrode 220 may be in contact with the first insulating layer 200.

[0103] On the other hand, the width of the first electrode 210 measured in the first direction DR1 can be formed to be smaller than the width of the second electrode 220 measured in the first direction DR1. Therefore, the first electrode 210 can be formed on the first inner bank 410 so that a portion of the outer surface of the first inner bank 410 is exposed. The first inner bank 410 and the second inner bank 420 can have the same width, and the first electrode 210 can be provided to cover only one side of the first inner bank 410 (for example, the side opposite to the other side of the first inner bank 410 facing the second inner bank 420). Therefore, according to one embodiment, the separation distance between the first inner bank 410 and the second inner bank 420 can be smaller than the separation distance between the first electrode 210 and the second electrode 220.

[0104] Each of the electrodes 210 and 220 can be used to form an electric field in the sub-pixel PXn, thereby aligning the light-emitting element 300. The light-emitting element 300 can be disposed between the first electrode 210 and the second electrode 220 by applying an alignment signal to the first electrode 210 and the second electrode 220 to form an electric field therebetween. As will be described below, the light-emitting element 300 can be sprayed onto the first electrode 210 and the second electrode 220 in a state dispersed in a predetermined ink using an inkjet process, and can be aligned between the first electrode 210 and the second electrode 220 by applying a dielectrophoretic force to the light-emitting element 300 by applying an alignment signal therebetween. Further detailed descriptions will be provided below with reference to other drawings.

[0105] Here, the alignment signal applied to each of the electrodes 210 and 220 may also be simultaneously applied to the second data conductive layer (e.g., the first voltage line 191 and the second voltage line 192) disposed below the first insulating layer 200. The first electrode 210 and the second electrode 220 are disposed on the same layer, and the first voltage line 191 and the second voltage line 192 of the second data conductive layer are disposed on the same layer. Depending on the thickness of the first insulating layer 200 disposed on the second data conductive layer, an electric field may be formed between the second electrode 220 and the first voltage line 191, in addition to between the second electrode 220 and the first electrode 210. Depending on the arrangement of the first voltage line 191, the intensity of the electric field formed between the second electrode 220 and the first voltage line 191 may be higher than the intensity of the electric field formed between the first electrode 210 and the second electrode 220. Therefore, during the manufacturing process of the display device 10 , the light emitting element 300 may receive a high-intensity dielectrophoretic force due to the electric field formed between the second electrode 220 and the first voltage line 191 and may be smoothly disposed between the first electrode 210 and the second electrode 220 .

[0106] In the display device 10 according to one embodiment, the first electrode 210 may be provided to cover only a portion of the upper surface of the first inner bank 410, and the horizontal distance between the first electrode 210 and the second electrode 220 may be greater than the horizontal distance between the second electrode 220 and the first voltage line 191. In the display device 10, the light-emitting elements 300 can be provided with a higher intensity electric field than when the light-emitting elements 300 are provided by forming an electric field only between the first electrode 210 and the second electrode 220, and the number of light-emitting elements 300 provided between the first electrode 210 and the second electrode 220 can be increased. In addition, the light-emitting elements 300 can be provided between the first electrode 210 and the second electrode 220 in a state of being aligned in one direction, and the light-emitting elements 300 provided with a higher intensity can reduce errors in the alignment direction, thereby improving the degree of alignment. A detailed description of this will be provided below.

[0107] At the same time, each of the electrodes 210 and 220 may include a transparent conductive material. As an example, each of the electrodes 210 and 220 may include a material such as indium tin oxide (ITO), indium zinc oxide (IZO), indium tin zinc oxide (ITZO), etc., but the present invention is not limited thereto. In some embodiments, each of the electrodes 210 and 220 may include a conductive material having high reflectivity. For example, each of the electrodes 210 and 220 may include a metal such as silver (Ag), copper (Cu), aluminum (Al), etc. as a material having high reflectivity. In this case, light incident on each of the electrodes 210 and 220 may be reflected and emitted in an upward direction relative to each subpixel PXn.

[0108] In addition, each of the electrodes 210 and 220 may be formed in a structure in which one or more layers of a transparent conductive material and a metal layer having high reflectivity are stacked, or may be formed as a single layer including a transparent conductive material and a metal layer. In an exemplary embodiment, each of the electrodes 210 and 220 may have a stacked structure of ITO / Ag / ITO / IZO, or may be an alloy including Al, Ni, lanthanum (La), etc. However, the present invention is not limited thereto.

[0109] In the accompanying drawings, one first electrode 210 and one second electrode 220 are shown as being provided in each sub-pixel PXn, but the present invention is not limited thereto. Similar to the inner banks 410 and 420, a greater number of first electrodes 210 and second electrodes 220 may be provided. In addition, the first electrodes 210 and the second electrodes 220 do not necessarily have a shape extending in one direction and may be provided in various structures. For example, the first electrode 210 and the second electrode 220 may both have a partially curved or bent shape, and one of the first electrode 210 and the second electrode 220 may be provided to surround the other of the first electrode 210 and the second electrode 220. As long as at least a portion of the first electrode 210 and at least a portion of the second electrode 220 are spaced apart from each other to form a region in which the light-emitting element 300 will be provided in the middle, the arrangement structure and shape of the first electrode 210 and the second electrode 220 are not particularly limited.

[0110] The second insulating layer 510 is disposed on the first insulating layer 200, the first electrode 210, and the second electrode 220. In addition to the region between the electrodes 210 and 220, or between the inner banks 410 and 420, which are spaced apart from each other, the second insulating layer 510 may also be disposed on the side of the inner banks 410 and 420 adjacent to the region between the inner banks 410 and 420. Furthermore, the second insulating layer 510 is disposed to partially cover the first inner bank 410, the first electrode 210, and the second electrode 220. For example, the second insulating layer 510 may be disposed entirely on the first insulating layer 200, on which the first and second electrodes 210 and 220 are formed, and may be disposed to expose a portion of the upper surface of each of the first and second electrodes 210 and 220. In other words, an opening (not shown) may be formed in the second insulating layer 510 to partially expose the first and second electrodes 210 and 220. Some of the first and second electrodes 210 and 220 disposed on the inner banks 410 and 420 may be partially exposed due to the opening.

[0111] Furthermore, as described above, since the first electrode 210 is provided to cover only one side of the first inner bank 410, the second insulating layer 510 may be provided to cover the other side of the first inner bank 410 (e.g., the side of the first inner bank 410 that is spaced apart from and faces the second inner bank 420). Therefore, according to one embodiment, at least a portion of the second insulating layer 510 may be in direct contact with the first inner bank 410. The second insulating layer 510 may be in contact with the first inner bank 410 in an exposed region of the upper surface of the first inner bank 410 where the first electrode 210 is not provided.

[0112] The second insulating layer 510 can protect the first electrode 210 and the second electrode 220 while insulating the first electrode 210 from the second electrode 220. In addition, the light emitting element 300 disposed on the second insulating layer 510 can be prevented from being damaged by direct contact with other components. However, the shape and structure of the second insulating layer 510 are not limited thereto.

[0113] In an exemplary embodiment, a stepped portion may be formed on a portion of the upper surface of the second insulating layer 510 between the first electrode 210 and the second electrode 220. In some embodiments, the second insulating layer 510 may include an inorganic insulating material, and due to the stepped portion formed by the electrodes 210 and 220 disposed below the second insulating layer 510, a portion of the upper surface of the second insulating layer 510 disposed to partially cover the first electrode 210 and the second electrode 220 may be stepped. An empty space may be formed between the light-emitting element 300 disposed on the second insulating layer 510 between the first electrode 210 and the second electrode 220, and the upper surface of the second insulating layer 510. The empty space may be filled with a material forming the third insulating layer 520, which will be described below.

[0114] The outer bank 450 may be disposed on the second insulating layer 510. Figure 2 and Figure 3 As shown in FIG, the outer bank 450 may be provided at the boundary between the sub-pixels PXn. The outer bank 450 may be provided to extend in the first direction DR1 and the second direction DR2 to surround the inner banks 410 and 420 and some of the electrodes 210 and 220, as well as the region in which the light emitting element 300 is provided between the inner banks 410 and 420 and between the electrodes 210 and 220. That is, the outer bank 450 may form a grid pattern on the entire surface of the display area DPA.

[0115] According to one embodiment, the height of outer bank 450 may be greater than the height of each of inner banks 410 and 420. Unlike inner banks 410 and 420, outer bank 450 can separate adjacent sub-pixels PXn and, during the inkjet process used to set light-emitting elements 300 during the manufacturing process of display device 10, prevent ink from overflowing into adjacent sub-pixels PXn. In other words, outer bank 450 can separate ink for other sub-pixels PXn, in which other light-emitting elements 300 are dispersed, to prevent the inks from mixing. Like inner banks 410 and 420, outer bank 450 may include polyimide (PI), but the present invention is not limited thereto.

[0116] The light-emitting element 300 may be provided between the first electrode 210 and the second electrode 220, or between the first inner bank 410 and the second inner bank 420. One end of the light-emitting element 300 may be electrically connected to the first electrode 210, and the other end of the light-emitting element 300 may be electrically connected to the second electrode 220. The light-emitting element 300 may be electrically connected to the first electrode 210 and the second electrode 220 through contact electrodes 261 and 262, which will be described below, respectively.

[0117] The plurality of light-emitting elements 300 may be arranged spaced apart from each other and aligned substantially parallel to each other. The separation distance between the light-emitting elements 300 is not particularly limited. In some cases, the plurality of light-emitting elements 300 may be arranged adjacent to each other to form a group, and a plurality of other light-emitting elements 300 may be grouped in a state spaced apart at predetermined intervals and may have uneven density, but may be oriented and aligned in one direction. In addition, in an exemplary embodiment, the light-emitting element 300 may have a shape extending in one direction, and the direction in which each electrode (e.g., each of the first electrode 210 and the second electrode 220) extends may be substantially perpendicular to the direction in which the light-emitting element 300 extends. However, the present invention is not limited thereto, and the light-emitting element 300 may be arranged tilted and not perpendicular to the direction in which each of the electrodes extends.

[0118] According to one embodiment, the light-emitting element 300 may include an active layer 330 having different materials to emit light within different wavelength ranges to the outside. According to one embodiment, the display device 10 may include a light-emitting element 300 that emits light within different wavelength ranges. The light-emitting element 300 of the first subpixel PX1 may include an active layer 330 that emits first light having a first wavelength at a center wavelength band, the light-emitting element 300 of the second subpixel PX2 may include an active layer 330 that emits second light having a second wavelength at a center wavelength band, and the light-emitting element 300 of the third subpixel PX3 may include an active layer 330 that emits third light having a third wavelength at a center wavelength band.

[0119] Thus, a first light may be emitted from the first subpixel PX1, a second light may be emitted from the second subpixel PX2, and a third light may be emitted from the third subpixel PX3. In some embodiments, the first light may be blue light having a central wavelength ranging from 450 nm to 495 nm, the second light may be green light having a central wavelength ranging from 495 nm to 570 nm, and the third light may be red light having a central wavelength ranging from 620 nm to 752 nm.

[0120] However, the present invention is not limited thereto. In some cases, the first subpixel PX1, the second subpixel PX2, and the third subpixel PX3 may include the same type of light emitting elements 300 that emit light of substantially the same color.

[0121] The light-emitting element 300 may be disposed on the second insulating layer 510 between the electrodes 210 and 220. For example, the light-emitting element 300 may be disposed on the second insulating layer 510 disposed between the inner banks 410 and 420. However, the present invention is not limited thereto, and although not shown in the drawings, at least some of the light-emitting elements 300 disposed in each subpixel PXn may be disposed in an area other than the area formed between the inner banks 410 and 420 (e.g., an area between the inner banks 410 and 420 and the outer bank 450). Furthermore, the light-emitting element 300 may be disposed so that a portion of its area overlaps each of the electrodes 210 and 220 in the thickness direction. As described above, in the display device 10 according to one embodiment, since the first electrode 210 is disposed to cover only one side of the first inner bank 410, one end of the light-emitting element 300 does not overlap the first electrode 210 in the thickness direction, and the other end overlaps the second electrode 220 in the thickness direction to be positioned on the second electrode 220.

[0122] Meanwhile, although not shown in the drawings, in the light emitting element 300, a plurality of layers may be arranged in a direction parallel to the upper surface of the first substrate 110 or the first insulating layer 200. The light emitting element 300 of the display device 10 according to one embodiment may have a shape extending in one direction and have a structure in which a plurality of semiconductor layers are sequentially arranged in one direction. The light emitting element 300 may be arranged so that the light emitting element 300 is parallel to the first insulating layer 200 in a direction along which it extends, and the plurality of semiconductor layers included in the light emitting element 300 may be sequentially arranged in a direction parallel to the upper surface of the first insulating layer 200. However, the present invention is not limited thereto. In some cases, when the light emitting element 300 has a different structure, the plurality of layers may be arranged in a direction perpendicular to the first insulating layer 200. A detailed description of the structure of the light emitting element 300 will be provided below with reference to other drawings.

[0123] The third 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 third insulating layer 520 may be disposed to partially surround the outer surface of the light-emitting element 300, thereby protecting the light-emitting element 300 and further serving to secure the light-emitting element 300 during the manufacturing process of the display device 10. In a plan view, a portion of the third insulating layer 520 disposed on the light-emitting element 300 may have a shape extending in the second direction DR2 between the first electrode 210 and the second electrode 220. As an example, the third insulating layer 520 may form a stripe-type or island-type pattern in each sub-pixel PXn.

[0124] According to one embodiment, a third insulating layer 520 may be provided on the light-emitting element 300 and may expose one end and the other end of the light-emitting element 300. The exposed ends of the light-emitting element 300 may contact the contact electrodes 261 and 262 described below. The third insulating layer 520 of this shape may be formed by patterning the material forming the third insulating layer 520 using a typical mask process. The width of the mask used to form the third insulating layer 520 is smaller than the length of the light-emitting element 300, and the material forming the third insulating layer 520 is patterned to expose both ends of the light-emitting element 300. However, the present invention is not limited thereto.

[0125] Furthermore, in an exemplary embodiment, a portion of the material of the third insulating layer 520 may be disposed between the lower surface of the light-emitting element 300 and the second insulating layer 510. The third insulating layer 520 may be formed to fill the space between the second insulating layer 510 and the light-emitting element 300 formed during the manufacturing process of the display device 10. Thus, the third 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.

[0126] A plurality of contact electrodes 261 and 262 and a fourth insulating layer 530 may be disposed on the third insulating layer 520 .

[0127] like Figure 2 As shown in , the plurality of contact electrodes 261 and 262 may each have a shape extending in one direction. The plurality of contact electrodes 261 and 262 may contact the electrodes 210 and 220 and the light emitting element 300, respectively, and the light emitting element 300 may receive electrical signals from the first electrode 210 and the second electrode 220 through the contact electrodes 261 and 262.

[0128] The contact electrodes 261 and 262 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 be disposed in partial regions of the first electrode 210 and the second electrode 220, respectively. The first contact electrode 261 may be disposed on the first electrode 210, and the second contact electrode 262 may be disposed on the second electrode 220. The first contact electrode 261 and the second contact electrode 262 may each have a shape extending in the second direction DR2. The first contact electrode 261 and the second contact electrode 262 may be spaced apart from each other and face each other in the first direction DR1, and may form a stripe pattern in the emission area EMA of each subpixel PXn.

[0129] In some embodiments, the width of each of the first contact electrode 261 and the second contact electrode 262 measured in one direction may be smaller than the width of each of the first electrode 210, the second electrode 220, or the second electrode branch portion 220B measured in one direction. The first contact electrode 261 and the second contact electrode 262 may be disposed so as to contact one end and the other end of the light-emitting element 300, respectively, and simultaneously partially contact the upper surfaces of the first electrode 210 and the second electrode 220, respectively. As described above, the upper surface of each of the first electrode 210 and the second electrode 220 may be partially exposed, and the first contact electrode 261 and the second contact electrode 262 may contact the exposed upper 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 bank 410, and the second contact electrode 262 may contact a portion of the second electrode 220 located on the second inner bank 420. However, the present invention is not limited thereto, and in some cases, the first contact electrode 261 and the second contact electrode 262 may be disposed to completely cover upper surfaces of the first electrode 210 and the second electrode 220 , respectively.

[0130] like Figure 3As shown in , the second contact electrode 262 is provided on the second electrode 220 and the second insulating layer 510. The second contact electrode 262 may be in contact with the other end portion of the light emitting element 300 and the exposed upper surface of the second electrode 220. The other end portion of the light emitting element 300 may be electrically connected to the second electrode 220 through the second contact electrode 262. The light emitting element 300 has a semiconductor layer exposed on both end surfaces of the light emitting element 300 in the extension direction, and the first contact electrode 261 and the second contact electrode 262 may be in contact with the light emitting element 300 on the end surfaces, and the semiconductor layer is exposed on the end surfaces. However, the present invention is not limited thereto. In some cases, both end side surfaces of the light emitting element 300 may 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 may be partially removed in the process of forming the third insulating layer 520 covering the outer surface of the light emitting element 300 (see Figure 4 ), and the exposed side surfaces of the light emitting element 300 may be in contact with the first contact electrode 261 and the second contact electrode 262 .

[0131] In the drawings, one first contact electrode 261 and one second contact electrode 262 are shown to be disposed in one sub-pixel PXn, but the present invention is not limited thereto. The number of first contact electrodes 261 and second contact electrodes 262 may vary depending on the number of first electrodes 210 and second electrodes 220 disposed in each sub-pixel PXn.

[0132] The fourth insulating layer 530 is provided on the second contact electrode 262. Since the fourth insulating layer 530 is provided to cover the second contact electrode 262, the fourth insulating layer 530 can electrically insulate the first contact electrode 261 and the second contact electrode 262 from each other. Specifically, the fourth insulating layer 530 can be provided to cover the second contact electrode 262 and may not be provided on one end of the light-emitting element 300, so that the light-emitting element 300 can contact the first contact electrode 261. The fourth insulating layer 530 may partially contact the second contact electrode 262 and the third insulating layer 520 at the upper surface of the third insulating layer 520. The side surface of the fourth insulating layer 530 in the direction in which the first electrode 210 is provided may be aligned with one side surface of the third insulating layer 520. However, the present invention is not limited to this.

[0133] The first contact electrode 261 is disposed on the first electrode 210, the third insulating layer 520, and the fourth insulating layer 530. The first contact electrode 261 may contact one end portion of the light emitting element 300 and the exposed upper surface of the first electrode 210. One end portion of the light emitting element 300 may be electrically connected to the second electrode 210 through the first contact electrode 261.

[0134] That is, the second contact electrode 262 is provided between the second electrode 220 and the fourth insulating layer 530, and the first contact electrode 261 may be provided on the fourth insulating layer 530. The first contact electrode 261 may partially contact the third insulating layer 520, the fourth insulating layer 530, the first electrode 210, and the light-emitting element 300. One end of the first contact electrode 261 in the direction in which the second electrode 220 is provided may be provided on the fourth insulating layer 530. The first contact electrode 261 and the second contact electrode 262 may not contact each other due to the third insulating layer 520 and the fourth insulating layer 530. However, the present invention is not limited thereto, and in some cases, the fourth insulating layer 530 may be omitted.

[0135] The contact electrodes 261 and 262 may include a conductive material. For example, the contact electrodes 261 and 262 may include ITO, IZO, ITZO, aluminum (Al), etc. However, the present invention is not limited thereto.

[0136] The fifth insulating layer 550 may be entirely disposed on the first substrate 110. The fifth insulating layer 550 may serve to protect components disposed on the first substrate 110 from external environments.

[0137] Each of the second insulating layer 510, the third insulating layer 520, the fourth insulating layer 530, and the fifth insulating layer 550 described above may include an inorganic insulating material or an organic insulating material. In an exemplary embodiment, the second insulating layer 510, the third insulating layer 520, the fourth insulating layer 530, and the fifth insulating layer 550 may each include an inorganic insulating material (such as silicon oxide (SiO x ), silicon nitride (SiN x ), silicon oxynitride (SiO x N y ), aluminum oxide (Al2O3), aluminum nitride (AlN), etc.). In addition, the second insulating layer 510, the third insulating layer 520, the fourth insulating layer 530, and the fifth insulating layer 550 may each include acrylic resin, epoxy resin, phenolic resin, polyamide resin, polyimide resin, unsaturated polyester resin, polyphenylene resin, polyphenylene sulfide resin, benzocyclobutene, cardo resin, siloxane resin, silsesquioxane resin, polymethyl methacrylate, polycarbonate, polymethyl methacrylate-polycarbonate synthetic resin, etc. as an organic insulating material. However, the present invention is not limited thereto.

[0138] Meanwhile, the light-emitting element 300 may be a light-emitting diode, and specifically, an inorganic light-emitting diode having a size in the micrometer or nanometer unit and made of an inorganic material. The inorganic light-emitting diode can be aligned between two electrodes, wherein polarity is formed by forming an electric field in a specific direction between the two electrodes facing each other. The light-emitting element 300 can be aligned between the two electrodes due to the electric field formed on the two electrodes.

[0139] 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-like, linear, or tubular shape. In an exemplary embodiment, the light emitting element 300 may have a cylindrical or rod-like shape. However, the shape of the light emitting element 300 is not limited thereto, and the light emitting element 300 may also have a shape of a cube, a rectangular parallelepiped, a polygonal column such as a hexagonal column, or a shape extending in one direction and having a partially inclined outer surface. Therefore, the light emitting element 300 may have various shapes. The multiple 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 arranged or stacked in one direction.

[0140] The light emitting element 300 may include a semiconductor layer doped with impurities of any conductivity type (eg, p-type or n-type), and may receive an electrical signal applied from an external power source and emit light within a specific wavelength range.

[0141] Figure 4 is a schematic diagram of a light emitting element according to an embodiment.

[0142] Reference Figure 4 The light emitting element 300 may include a first semiconductor layer 310 , a second semiconductor layer 320 , an active layer 330 , an electrode layer 370 and an insulating film 380 .

[0143] 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 having a chemical formula of Al x Ga y In 1-x-y The semiconductor material may be a semiconductor material having a thickness of N (0≤x≤1, 0≤y≤1, 0≤x+y≤1). For example, the semiconductor material may be one or more of AlGaInN, GaN, AlGaN, InGaN, AlN, and InN doped with n-type impurities. The first semiconductor layer 310 may be doped with an n-type dopant. As an example, the n-type dopant may be Si, Ge, Sn, or the like. In an exemplary embodiment, the first semiconductor layer 310 may be n-GaN doped with n-type Si. The length of the first semiconductor layer 310 may be in the range of 1.5 μm to 5 μm, but the present invention is not limited thereto.

[0144] The second semiconductor layer 320 is provided on the active layer 330 to 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 wavelength range or the green wavelength range, the second semiconductor layer 320 may include a semiconductor having a chemical formula of Al x Ga y In 1-x-y The second semiconductor layer 320 may be a semiconductor material having a thickness of N (0≤x≤1, 0≤y≤1, 0≤x+y≤1). For example, the semiconductor material may be one or more of AlGaInN, GaN, AlGaN, InGaN, AlN, and InN doped with p-type impurities. The second semiconductor layer 320 may be doped with a p-type dopant. As examples, the p-type dopant may be Mg, Zn, Ca, Ba, etc. In an exemplary embodiment, the second semiconductor layer 320 may be p-GaN doped with p-type Mg. The length of the second semiconductor layer 320 may be in the range of 0.05 μm to 0.10 μm, but the present invention is not limited thereto.

[0145] Meanwhile, each of the first semiconductor layer 310 and the second semiconductor layer 320 is shown in the drawings as being formed as a single layer, but the present invention is not limited thereto. According to some embodiments, each of the first semiconductor layer 310 and the second semiconductor layer 320 may further include a larger number of layers (e.g., a cladding layer or a tensile strain barrier reduction (TSBR) layer) depending on the material of the active layer 330. A description thereof will be provided below with reference to other drawings.

[0146] The active layer 330 is disposed between the first semiconductor layer 310 and the second semiconductor layer 320. The active layer 330 may include a material having a single quantum well structure or a multiple quantum well structure. When the active layer 330 includes 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 combination of electron-hole pairs. As an example, when the active layer 330 emits light in the blue wavelength range, the active layer 330 may include a material such as AlGaN, AlGaInN, etc. Specifically, 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 include a material such as AlGaN or AlGaInN, and the well layers may include a material such as GaN or AlInN. In an exemplary embodiment, the active layer 330 includes AlGaInN as the quantum layers and AlInN as the well layers. As described above, the active layer 330 may emit blue light having a central wavelength band ranging from 450 nm to 495 nm.

[0147] However, the present invention is not limited thereto, and the active layer 330 may have a structure in which semiconductor materials having a large energy band gap and semiconductor materials having a small energy band gap are alternately stacked, 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 wavelength range or the 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.

[0148] Meanwhile, light emitted from the active layer 330 may be emitted not only to the outer surface of the light emitting element 300 but also to both side surfaces in the length direction of the light emitting element 300. Directivity of light emitted from the active layer 330 is not limited to one direction.

[0149] The electrode layer 370 may be an ohmic contact electrode. However, the present invention is not limited thereto, and the electrode layer 370 may also be a Schottky contact electrode. The light emitting element 300 may include at least one electrode layer 370. Although the light emitting element 300 is Figure 4 3. Although shown as including a single electrode layer 370, the present invention is not limited thereto. In some cases, the light emitting element 300 may include a larger number of electrode layers 370, or may omit the electrode layer 370. Even if the number of electrode layers 370 is changed or another structure is further included, the description of the light emitting element 300 provided below can also be applied.

[0150] When light-emitting element 300 is electrically connected to electrodes 210 and 220 or contact electrodes 261 and 262, electrode layer 370 can reduce the resistance between light-emitting element 300 and the electrodes or contact electrodes. Electrode layer 370 may include a conductive metal. For example, electrode layer 370 may include at least one of aluminum (Al), titanium (Ti), indium (In), gold (Au), silver (Ag), indium tin oxide (ITO), indium zinc oxide (IZO), and indium tin zinc oxide (ITZO). Furthermore, electrode layer 370 may include a semiconductor material doped with n-type or p-type impurities. Electrode layer 370 may include the same material or different materials, but the present invention is not limited thereto.

[0151] The insulating film 380 is provided 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 provided to surround at least the outer surface of the active layer 330 and may extend in a direction along which the light-emitting element 300 extends. The insulating film 380 may be used to protect the component. As an example, the insulating film 380 may be formed to surround a portion of the side surface of the component and expose both ends of the light-emitting element 300 in the longitudinal direction.

[0152] In the accompanying drawings, the insulating film 380 is shown as being formed to extend in the longitudinal direction of the light-emitting element 300 so as to cover the side surfaces from the first semiconductor layer 310 to the electrode layer 370, but the present invention is not limited thereto. Since the insulating film 380 only covers the outer surfaces of some 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 may be partially exposed. In addition, the upper surface of the insulating film 380 may be formed into a circular cross-section in a region adjacent to at least one end of the light-emitting element 300.

[0153] The thickness of the insulating film 380 may 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 may be about 40 nm.

[0154] The insulating film 380 may include a material having insulating properties (eg, silicon oxide (SiO x ), silicon nitride (SiN x ), silicon oxynitride (SiO x N y ), aluminum nitride (AlN), aluminum oxide (Al2O3), etc.). Therefore, it is possible to prevent an electrical short circuit that may occur when active layer 330 directly contacts an electrode through which an electrical signal is transmitted to light-emitting element 300. Furthermore, since insulating film 380 protects the outer surface of light-emitting element 300 including active layer 330, it is possible to prevent degradation of luminous efficiency.

[0155] 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 elements 300 can be aligned on the electrodes by spraying them dispersed in a predetermined ink. To maintain the state where the light-emitting elements 300 are dispersed in the ink and do not aggregate with adjacent light-emitting elements 300, the surface of the insulating film 380 may be treated to be hydrophobic or hydrophilic.

[0156] The light-emitting element 300 may have a length h ranging from 1 μm to 10 μm or from 2 μm to 6 μm (preferably, from 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 present 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 composition of the active layer 330. Preferably, the diameter of the light-emitting element 300 may be approximately 500 nm.

[0157] In the display device 10 according to one embodiment, since the first electrode 210 is provided to cover only one side of the first inner bank 410 (for example, a side opposite to the other side of the first inner bank 410 facing the second inner bank 420), the distance between the first electrode 210 and the second electrode 220 can be greater than the distance between the first inner bank 410 and the second electrode 220. In addition, the light emitting element 300 provided between the first inner bank 410 and the second inner bank 420 may not overlap with the first electrode 210 in the thickness direction.

[0158] As described above, in the display device 10, since the first electrode 210 is provided to cover only one side of the first inner bank 410, the horizontal distance between the second electrode 220 and the first electrode 210 can be greater than the horizontal distance between the second electrode 220 and the first voltage line 191. Therefore, the electric field formed between the second electrode 220 and the first voltage line 191 has a higher intensity than the electric field formed between the second electrode 220 and the first electrode 210, and due to the high intensity of the electric field, the light emitting element 300 can be arranged with a high degree of alignment.

[0159] Hereinafter, a manufacturing process of the display device 10 will be described with reference to other drawings. Hereinafter, the sequence of the manufacturing process of the display device 10 will be described in detail, and a description of a method of forming each member will be omitted.

[0160] Figure 5 is a cross-sectional view illustrating a portion of a manufacturing process of a display device according to one embodiment. Figure 6 is a plan view illustrating a portion of a manufacturing process of a display device according to one embodiment.

[0161] First, refer to Figure 5 and Figure 6 , a first substrate 110, a circuit element layer disposed on the first substrate 110, and a first insulating layer 200 disposed on the circuit element layer are formed, and inner banks 410 and 420, a first electrode line 210', and a second electrode 220 are formed on the first insulating layer 200. As described above, the circuit element layer includes the first transistor 120, the second transistor 140, a plurality of voltage lines 191 and 192, etc. A detailed description thereof will be omitted.

[0162] Specifically, a first inner bank 410 and a second inner bank 420 are formed on the first insulating layer 200, and a first electrode line 210' and a second electrode 220 are formed on the first inner bank 410 and the second inner bank 420, respectively. As described above, the width of the second electrode 220 measured in one direction is formed to be larger than the width of the second inner bank 420 measured in one direction, so that the second electrode 220 is provided to cover the outer surface of the second inner bank 420. On the other hand, the width of the first electrode line 210' measured in one direction is formed to be smaller than the width of the second electrode 220 measured in one direction, so that the first electrode line 210' is provided to cover only one side surface of the first inner bank 410.

[0163] At the same time, if Figure 6 As shown in , during the manufacturing process of the display device 10, the first electrode lines 210' can be formed to extend in the second direction DR2 and also be disposed in adjacent sub-pixels PXn. The first electrode lines 210' and the second electrode 220 can also be disposed in the non-display area NDA located at the periphery of the display area DPA. During the process of disposing the light-emitting element 300, the first electrode lines 210' and the second electrode 220 disposed in the non-display area NDA can be electrically connected to an external device (not shown) to directly receive an alignment signal. Thereafter, in a subsequent process, a process of disconnecting a portion of the first electrode lines 210' can be performed to form the first electrodes 210.

[0164] Figure 7 and Figure 8 is a cross-sectional view illustrating a portion of a manufacturing process of a display device according to one embodiment.

[0165] Then, refer to Figure 7 A second insulating material layer 510' is formed on the first insulating layer 200 to cover the first electrode line 210' and the second electrode 220, and an outer bank 450 is formed on the second insulating material layer 510'. Figure 7 No opening (not shown) is formed in the second insulating material layer 510′, and thus the second insulating material layer 510′ may completely cover the first electrode line 210′ and the second electrode 220. In a subsequent process, the second insulating material layer 510′ may be partially etched, and an opening (not shown) partially exposing the upper surface of each of the first electrode 210 and the second electrode 220 may be formed, thereby forming the second insulating layer 510.

[0166] The outer bank 450 is provided at the boundary of each sub-pixel PXn on the second insulating material layer 510' to surround the inner banks 410 and 420. During the process of providing the light-emitting element 300, the outer bank 450 can prevent the ink ejected on the electrodes 210 and 220 from overflowing to another adjacent sub-pixel PXn. The description thereof is the same as above.

[0167] Next, refer to Figure 8 , an electric field E is formed between the first electrode line 210' and the second electrode 220, thereby aligning the light-emitting elements 300 between the first electrode line 210' and the second electrode 220. In some embodiments, the light-emitting elements 300 can be ejected in each pixel PX or sub-pixel PXn in a state dispersed in a predetermined ink using an inkjet process. These elements can be aligned between the electrodes 210 and 220 by forming an electric field E between the first electrode line 210' and the second electrode 220. When the light-emitting elements 300 dispersed in the ink are ejected and an alignment signal is then applied to the first electrode line 210' and the second electrode 220 (or the first voltage line 191 and the second voltage line 192), an electric field E is formed between them, and the light-emitting elements 300 can be subjected to a dielectrophoretic force due to the electric field. Having been subjected to the dielectrophoretic force, the light-emitting elements 300 can be aligned between the first electrode line 210' and the second electrode 220, while their orientation direction and position are changed within the ink.

[0168] Here, one of the first electrode line 210' and the second electrode 220 may be grounded, and alternating current (AC) power may be applied to the other electrode. For example, when the first electrode line 210' is grounded and AC power is applied to the second electrode 220, the AC power may be applied directly to the second electrode 220 rather than the second voltage line 192. As described above, during the manufacturing process of the display device 10, the process of applying AC power to the second electrode 220 may be performed through a line connected to the second electrode 220, and thereafter, the process of disconnecting the line may be performed.

[0169] At the same time, an alignment area AA (see FIG. 1 ) in which the light emitting element 300 is disposed may be formed between the first inner bank 410 and the second inner bank 420 (or between the first electrode 210 and the second electrode 220). Figure 7 In the alignment area AA, an electric field may be formed due to the alignment signal applied to the first and second electrodes 210 and 220 (or the first and second voltage lines 191 and 192 ), and the light emitting element 300 may be disposed between the first and second electrodes 210 and 220 by receiving a dielectrophoretic force due to the electric field.

[0170] As described above, in the display device 10 according to one embodiment, the horizontal distance W2 (see Figure 7 ) may be greater than the horizontal distance W1 between the second electrode 220 and the first voltage line 191 (see Figure 7) is greater. During the process of providing the light-emitting element 300, an alignment signal may be applied to each of the first electrode 210, the second electrode 220, the first voltage line 191, and the second voltage line 192. Unlike the first electrode 210, since the first voltage line 191 is provided at a different layer from the second electrode 220, the horizontal distance W1 between the first voltage line 191 and the second electrode 220 may be formed to be smaller than the horizontal distance W2 between the first electrode 210 and the second electrode 220. Therefore, an electric field having a higher intensity than that formed between the first electrode 210 and the second electrode 220 may be formed between the first voltage line 191 and the second electrode 220. The light-emitting element 300 may be subjected to a strong dielectrophoretic force due to the high intensity electric field and may be provided between the electrodes 210 and 220 with a high degree of alignment.

[0171] In addition, since the first electrode 210 is provided only on one side of the first inner bank 410 and not on the other side of the first inner bank 410 that is spaced apart from and faces the second inner bank 420, the electric field formed between the first voltage line 191 and the second electrode 220 is not blocked by the first electrode 210. That is, according to one embodiment, the first electrode 210 is provided to cover one side of the first inner bank 410, and the first voltage line 191 may overlap with the other side of the first inner bank 410 where the first electrode 210 is not provided in the thickness direction. The first voltage line 191 may not overlap with the first electrode 210 in the thickness direction at the other side of the first inner bank 410.

[0172] At the same time, an alignment signal may also be applied to the second voltage line 192 during the process of providing the light-emitting element 300. Although not shown in the drawings, the horizontal distance between the first voltage line 191 and the second voltage line 192 may be greater than the horizontal distance W1 between the first voltage line 191 and the second electrode 220. Therefore, when the alignment signal is applied to each of the electrodes 210 and 220 and each of the voltage lines 191 and 192, the strongest electric field may be formed between the first voltage line 191 and the second electrode 220. However, the present invention is not limited thereto.

[0173] Figure 9 is a plan view illustrating a portion of a manufacturing process of a display device according to one embodiment.

[0174] Next, refer to Figure 9 , a portion of the first electrode line 210' is disconnected to form the first electrode 210. The process of disconnecting the first electrode line 210' can be performed through a typical patterning process. In addition, although not shown in the drawings, in the case of the second electrode 220, a process of disconnecting the line connected in the non-display area NDA and to which the alignment signal is applied can also be performed.

[0175] Next, a third insulating layer 520 , a fourth insulating layer 530 , a first contact electrode 261 , and a second contact electrode 262 are formed on the light emitting element 300 .

[0176] Figures 10 to 15 is a cross-sectional view illustrating a portion of a manufacturing process of a display device according to one embodiment.

[0177] First, refer to Figure 10 A third insulating material layer 520' is formed on the second insulating material layer 510' to cover the second insulating material layer 510'. In subsequent processes, a portion of the third insulating material layer 520' may be patterned together with the second insulating material layer 510' to form the third insulating layer 520. The third insulating material layer 520' may be completely disposed on the second insulating material layer 510' and may secure the light-emitting element 300 so that the light-emitting element 300 does not shift during subsequent processes.

[0178] Next, refer to Figure 11 and Figure 12 The second insulating material layer 510' and the third insulating material layer 520' are partially patterned to expose a portion of the second electrode 220 and one end of the light-emitting element 300, and a second contact electrode 262 is formed to contact the exposed second electrode 220 and the light-emitting element 300. A portion of the second electrode 220 disposed on the second inner bank 420 may be partially exposed. The process of patterning the second insulating material layer 510' and the third insulating material layer 520' and the process of forming the second contact electrode 262 may be performed by a typical patterning process. A detailed description thereof will be omitted.

[0179] Next, refer to Figure 13 A fourth insulating material layer 530' is formed to cover the upper surface of the second contact electrode 262 and the third insulating material layer 520'. In a subsequent process, the fourth insulating material layer 530' may be partially patterned together with the third insulating material layer 520' to form the fourth insulating layer 530.

[0180] Next, refer to Figure 14 and Figure 15, a portion of each of the second insulating material layer 510', the third insulating material layer 520', and the fourth insulating material layer 530' is patterned to expose the first electrode 210 and the other end of the light-emitting element 300, and to form a first contact electrode 261 in contact with the exposed first electrode 210 and the light-emitting element 300. A portion of the first electrode 210 disposed on the first inner bank 410 may be partially exposed. In this process, the second insulating material layer 510', the third insulating material layer 520', and the fourth insulating material layer 530' may be patterned to form the second insulating layer 510, the third insulating layer 520, and the fourth insulating layer 530, respectively.

[0181] At the same time, Figures 10 to 15 , the first contact electrode 261 and the second contact electrode 262 are shown as being formed in different processes including the process of forming the fourth insulating layer 530. However, the present invention is not limited thereto, and the first contact electrode 261 and the second contact electrode 262 may be formed simultaneously in one process. This will be described in detail below with reference to other embodiments.

[0182] Subsequently, although not shown in the drawings, a fifth insulating layer 550 disposed to cover the members disposed on the first substrate 110 is formed, thereby manufacturing the display device 10 according to one embodiment.

[0183] Hereinafter, various embodiments of the display device 10 will be described.

[0184] Figure 16 is a cross-sectional view illustrating a portion of a display device according to another embodiment.

[0185] Reference Figure 16 In the display device 10_1 according to an embodiment, the fourth insulating layer 530 may be omitted. Figure 3 The embodiment of FIG. 5 is different in that the fourth insulating layer 530 is omitted. Hereinafter, repeated descriptions will be omitted, and descriptions will be provided based on differences from the above.

[0186] exist Figure 16 In the display device 10_1, the fourth insulating layer 530 is omitted, and the first contact electrode 261_1 can be directly disposed on the third insulating layer 520_1. In some embodiments, when the third insulating layer 520_1 includes an organic insulating material, the first contact electrode 261_1 and the second contact electrode 262_1 can be simultaneously formed in one process.

[0187] Figure 17 and Figure 18 It shows Figure 16 A cross-sectional view of a portion of a manufacturing process of a display device.

[0188] Reference Figure 17 and Figure 18 ,like Figure 17 As shown in FIG, after the light-emitting element 300 is disposed between the first electrode 210 and the second electrode 220, a portion of the upper surface of each of the first electrode 210 and the second electrode 220 may be simultaneously exposed during the process of forming the third insulating layer 520_1. Subsequently, the first contact electrode 261_1 and the second contact electrode 262_1 may be simultaneously formed on the third insulating layer 520_1 disposed on the light-emitting element 300, but the first contact electrode 261_1 and the second contact electrode 262_1 are spaced apart from each other. Therefore, a portion of the lower surface of the first contact electrode 261_1 may be in direct contact with the third insulating layer 520_1. In the display device 10_1 according to this embodiment, since the fourth insulating layer 530 is omitted and the first contact electrode 261_1 and the second contact electrode 262_1 are simultaneously formed in a single process, the number of manufacturing processes for the display device 10_1 can be reduced.

[0189] Meanwhile, the display device 10_1 may include a greater number of inner banks 410 and 420 and a greater number of electrodes 210 and 220 .

[0190] Figure 19 is a plan view showing one sub-pixel of a display device according to still another embodiment. Figure 20 It shows Figure 19 A cross-sectional view of a portion of a display device.

[0191] Reference Figure 19 and Figure 20 According to an embodiment, the display device 10_2 may further include: a third inner bank 430_2 and a fourth inner bank 440_2 disposed between the first inner bank 410_2 and the second inner bank 420_2; a third electrode 230_2 and a fourth electrode 240_2 disposed between the first electrode 210_2 and the second electrode 220_2; and a third contact electrode 263_2 and a fourth contact electrode 264_2 disposed between the first contact electrode 261_2 and the second contact electrode 262_2. Figure 2 and Figure 3 The embodiment of the present invention is different in that a third inner bank 430_2, a fourth inner bank 440_2, a third electrode 230_2, and a fourth electrode 240_2 are further included. Hereinafter, repeated descriptions will be omitted, and descriptions will be provided based on differences from the above.

[0192] Figure 19 and Figure 20The display device 10_2 may further include a third inner bank 430_2 and a fourth inner bank 440_2. The third inner bank 430_2 and the fourth inner bank 440_2 may have a structure substantially the same as that of the first inner bank 410_2 and the second inner bank 420_2. That is, the third inner bank 430_2 and the fourth inner bank 440_2 extend in the second direction DR2 in each subpixel PXn and may face each other so as to be spaced apart from the first inner bank 410_2 and the second inner bank 420_2, respectively, in the first direction DR1. For example, the first inner bank 410_2, the third inner bank 430_2, the fourth inner bank 440_2, and the second inner bank 420_2 may be sequentially arranged from one side of the subpixel PXn toward the other side of the subpixel PXn in the first direction DR1 so as to be spaced apart from each other. As will be described below, an alignment area AA in which the light emitting element 300 is disposed may be formed between the first to third inner banks 410_2 , 430_2 , fourth to fourth inner banks 440_2 , and second inner banks 420_2 , and a greater number of light emitting elements 300 may be disposed for each subpixel PXn.

[0193] The third electrode 230_2 is disposed on the third inner bank 430_2, and the fourth electrode 240_2 is disposed on the fourth inner bank 440_2. The third electrode 230_2 and the fourth electrode 240_2 may each have a shape similar to that of the first electrode 210_2. The third electrode 230_2 and the fourth electrode 240_2 may be disposed to extend in the second direction DR2 on the third inner bank 430_2 and the fourth inner bank 440_2, respectively, and may be spaced apart from each other and face each other in the first direction DR1. For example, the first electrode 210_2, the third electrode 230_2, the fourth electrode 240_2, and the second electrode 220_2 may be sequentially disposed in the first direction DR1 from one side of the subpixel PXn toward the other side of the subpixel PXn so that the first electrode 210_2, the third electrode 230_2, the fourth electrode 240_2, and the second electrode 220_2 are spaced apart from each other.

[0194] However, unlike the first electrode 210_2 and the second electrode 220_2, the third electrode 230_2 and the fourth electrode 240_2 may not be electrically connected to a circuit element or line provided in each pixel PX or subpixel PXn. The first electrode 210_2 may be electrically connected to the first transistor 120 via the first conductive pattern 196_2, and the second electrode 220_2 may be electrically connected to the second voltage line 192_2. However, the third electrode 230_2 and the fourth electrode 240_2 may be floating electrodes that are not electrically connected to the first transistor 120 or the second voltage line 192_2. The third electrode 230_2 and the fourth electrode 240_2 may be electrodes through which electrical signals transmitted to the first electrode 210_2 and the second electrode 220_2 flow, rather than directly transmitting electrical signals applied from circuit elements or lines.

[0195] Meanwhile, according to one embodiment, the third electrode 230_2 may be provided to cover only one side of the third inner bank 430_2 (e.g., the side facing the first inner bank 410_2), and the fourth electrode 240_2 may be provided to cover only one side of the fourth inner bank 440_2 (e.g., the side facing the third inner bank 430_2). Similar to the first electrode 210_2, the third electrode 230_2 and the fourth electrode 240_2 may also be provided to partially expose the third inner bank 430_2 and the fourth inner bank 440_2. As will be described below, in the display device 10_2, the second data conductive layer may include a greater number of conductive lines, and the horizontal distance between each of the electrodes may be smaller than the horizontal distance between the electrodes 210_2, 220_2, 230_2, and 240_2. Therefore, the third electrode 230_2 and the fourth electrode 240_2 may be provided to cover only portions of the third inner bank 430_2 and the fourth inner bank 440_2, respectively, so as not to block the electric field formed between each of the electrodes and each of the conductive lines. Detailed description thereof will be provided below with reference to other drawings.

[0196] A third contact electrode 263_2 may be disposed on the third electrode 230_2, and a fourth contact electrode 264_2 may be disposed on the fourth electrode 240_2. Unlike the first contact electrode 261_2 and the second contact electrode 262_2, the third contact electrode 263_2 and the fourth contact electrode 264_2 may have widths greater than those of the corresponding electrodes. According to one embodiment, the width of each of the third contact electrode 263_2 and the fourth contact electrode 264_2 measured in one direction may be greater than the width of each of the third electrode 230_2 and the fourth electrode 240_2 measured in one direction. Therefore, the third contact electrode 263_2 may contact both the light-emitting element 300 disposed between the first electrode 210_2 and the third electrode 230_2, and the light-emitting element 300 disposed between the third electrode 230_2 and the fourth electrode 240_2. The fourth contact electrode 264_2 may simultaneously make contact with the light emitting element 300 disposed between the third electrode 230_2 and the fourth electrode 240_2 and the light emitting element 300 disposed between the fourth electrode 240_2 and the second electrode 220_2 .

[0197] Specifically, according to one embodiment, in the display device 10_2, the third contact electrode 263_2 may include a third-first contact electrode 263a_2 and a third-second contact electrode 263b_2, and the fourth contact electrode 264_2 may include a fourth-first contact electrode 264a_2 and a fourth-second contact electrode 264b_2. Figure 20 As shown in , the third-first contact electrode 263a_2 may be in contact with one end portion of the light-emitting element 300 disposed between the first electrode 210_2 and the third electrode 230_2, and the third-second contact electrode 263b_2 may be in contact with one end portion of the light-emitting element 300 disposed between the third electrode 230_2 and the fourth electrode 240_2, and the third electrode 230_2. Furthermore, the fourth-first contact electrode 264a_2 may be in contact with the other end portion of the light-emitting element 300 disposed between the third electrode 230_2 and the fourth electrode 240_2, and the fourth-second contact electrode 264b_2 may be in contact with one end portion of the light-emitting element 300 disposed between the fourth electrode 240_2 and the second electrode 220_2, and the fourth electrode 240_2.

[0198] During the manufacturing process of display device 10_2, the process of forming contact electrodes may be performed twice. During this process, third-first contact electrode 263a_2 and fourth-first contact electrode 264a_2 may be formed simultaneously during the process of forming second contact electrode 262_2, and third-second contact electrode 263b_2 and fourth-second contact electrode 264b_2 may be formed simultaneously during the process of forming first contact electrode 261_2. Third-first contact electrode 263a_2 and third-second contact electrode 263b_2 may both contact third electrode 230_2 and each other, thereby forming a single third contact electrode 263_2. Similarly, fourth-first contact electrode 264a_2 and fourth-second contact electrode 264b_2 may both contact fourth electrode 240_2 and each other, thereby forming a single fourth contact electrode 264_2. As an example, the third-first contact electrode 263a_2 and the third-second contact electrode 263b_2 may contact each other on the third electrode 230_2, and the fourth-first contact electrode 264a_2 and the fourth-second contact electrode 264b_2 may contact each other on the fourth electrode 240_2, but in some cases, one contact electrode may be disposed on the other contact electrode to contact each other.

[0199] However, the present invention is not limited thereto. In some cases, the third-first contact electrode 263a_2 and the third-second contact electrode 263b_2, as well as the fourth-first contact electrode 264a_2 and the fourth-second contact electrode 264b_2, may be in contact with the third electrode 230_2 and the fourth electrode 240_2, respectively, or may be spaced apart from and not in contact with them. Even if the third electrode 230_2 and the fourth electrode 240_2 are floating electrodes, some of the light-emitting elements 300 may receive electrical signals from the first electrode 210_2 and the second electrode 220_2 through the third contact electrode 263_2 and the fourth contact electrode 264_2.

[0200] When an electrical signal is transmitted through the first electrode 210_2, the electrical signal can be transmitted to one end of the light-emitting element 300 disposed between the first electrode 210_2 and the third electrode 230_2. The electrical signal can be transmitted to the third contact electrode 263_2 and the third electrode 230_2, and can be transmitted to the light-emitting element 300 disposed between the third electrode 230_2 and the fourth electrode 240_2. Similarly, the electrical signal can be transmitted to the fourth contact electrode 264_2 and the fourth electrode 240_2, and can be transmitted to the light-emitting element 300 disposed between the fourth electrode 240_2 and the second electrode 220_2. However, the present invention is not limited to this. The light-emitting element 300 disposed between the third electrode 230_2 and the fourth electrode 240_2 can receive the electrical signal transmitted through each of the first electrode 210_2 and the second electrode 220_2 only through the third electrode 230_2 and the fourth electrode 240_2, and these electrodes can be connected in series. The display device 10_2 according to one embodiment may further include a third electrode 230_2 and a fourth electrode 240_2 so that some of the plurality of light emitting elements 300 may be connected in series, thereby improving light emitting efficiency.

[0201] While the accompanying drawings illustrate the provision of a third inner bank 430_2, a third electrode 230_2, a fourth inner bank 440_2, and a fourth electrode 240_2, the present invention is not limited thereto. In some cases, the number of third electrodes 230_2 and fourth electrodes 240_2 disposed between the first electrode 210_2 and the second electrode 220_2 may be increased, and in some embodiments, one electrode may be omitted. Obviously, the above description applies similarly to the third inner bank 430_2 and the fourth inner bank 440_2.

[0202] Furthermore, since the display device 10_2 includes a greater number of electrodes, a greater number of conductive lines may be provided in the second data conductive layer. The second data conductive layer may further include a third voltage line 193_2 and a fourth voltage line 194_2. During the manufacturing process of the display device 10_2, alignment signals applied via the third voltage line 193_2 and the fourth voltage line 194_2 may form an electric field in the plurality of alignment areas AA.

[0203] Figures 21 to 26 It shows Figure 19 A cross-sectional view and a plan view of a portion of a manufacturing process of a display device.

[0204] First, refer to Figure 21 and Figure 22, a first inner bank 410_2, a second inner bank 420_2, a third inner bank 430_2, and a fourth inner bank 440_2 are formed on the first insulating layer 200, and a first electrode line 210'_2, a second electrode 220_2, a third electrode line 230'_2, and a fourth electrode line 240'_2 are formed and disposed on the first inner bank 410_2, the second inner bank 420_2, the third inner bank 430_2, and the fourth inner bank 440_2, respectively. The description of their arrangement is the same as above. For example, the second electrode 220_2 is formed to have a width greater than that of the second inner bank 420_2 and is disposed to cover the outer surface of the second inner bank 420_2, and the first electrode line 210'_2, the third electrode line 230'_2, and the fourth electrode line 240'_2 are disposed to cover only one side of the first inner bank 410_2, the third inner bank 430_2, and the fourth inner bank 440_2, respectively. The first electrode line 210 ′_2 , the third electrode line 230 ′_2 , and the fourth electrode line 240 ′_2 may be partially disconnected in a subsequent process to form the first electrode 210_2 , the third electrode 230_2 , and the fourth electrode 240_2 , respectively.

[0205] Meanwhile, in addition to first voltage line 191_2 and second voltage line 192_2, the second data conductive layer may further include third voltage line 193_2 and fourth voltage line 194_2. A first power supply voltage VDD may be applied to third voltage line 193_2 in the same manner as first voltage line 191_2, and a second power supply voltage VSS may be applied to fourth voltage line 194_2 in the same manner as second voltage line 192_2. As described above, since the horizontal distance between electrodes disposed on first insulating layer 200 is formed to be greater than the horizontal distance between each of the electrodes and each of the voltage lines, a strong electric field may be formed between each of the electrodes and each of the voltage lines during the manufacturing process of display device 10_2.

[0206] Reference Figure 23 and Figure 24 First, an electric field E is formed between the second electrode 220_2 and the fourth electrode line 240 ′_2 to align the light emitting element 300 between the fourth electrode line 240 ′_2 and the second electrode 220_2.

[0207] A first alignment area AA1 may be formed between the second inner bank 420_2 and the fourth inner bank 440_2, a second alignment area AA2 may be formed between the fourth inner bank 440_2 and the third inner bank 430_2, and a third alignment area AA3 may be formed between the third inner bank 430_2 and the first inner bank 410_2. As described above, due to the alignment signal applied to each of the electrode 220_2 or the electrode lines 210'_2, 230'_2, and 240'_2 and the voltage lines 191_2, 192_2, 193_2, and 194_2, an electric field may be formed in each of the alignment areas AA1, AA2, and AA3, and the light emitting element 300 may be positioned between the first electrode 210 and the second electrode 220 by receiving a dielectrophoretic force due to the electric field.

[0208] As described above, in the display device 10_2 according to one embodiment, the horizontal distance W2 ( Figure 24 ) may be greater than the horizontal distance W1 between the one electrode and the voltage line adjacent thereto ( Figure 24 )big.

[0209] For example, a horizontal distance W1 between the second electrode 220_2 and the third voltage line 193_2 disposed below the fourth inner bank 440_2 may be formed to be smaller than a horizontal distance W2 between the second electrode 220_2 and the fourth electrode line 240 ′_2 or the fourth electrode 240_2. Since the fourth electrode 240_2 or the fourth electrode line 240 ′_2 is disposed only on one side of the fourth inner bank 440_2 and not on the other side of the fourth inner bank 440_2 that is disposed spaced apart from and facing the second inner bank 420_2, an electric field formed between the third voltage line 193_2 and the second electrode 220_2 may not be blocked by the fourth electrode 240_2 or the fourth electrode line 240 ′_2. That is, according to one embodiment, the fourth electrode 240_2 is provided to cover one side of the fourth inner bank 440_2, and the third voltage line 193_2 may overlap with the other side of the fourth inner bank 440_2 on which the fourth electrode 240_2 is not provided in the thickness direction. At the other side of the fourth inner bank 440_2, the third voltage line 193_2 may not overlap with the fourth electrode 240_2 in the thickness direction.

[0210] Therefore, a higher electric field can be formed between the third voltage line 193_2 and the second electrode 220_2 than between the second electrode 220_2 and the fourth electrode 240_2 or the fourth electrode line 240'_2. Due to the high-intensity electric field, the light-emitting element 300 can be subjected to a strong dielectrophoretic force and can be positioned between the electrodes with a high degree of alignment. At the same time, the horizontal distance between the second voltage line 192_2 and the third voltage line 193_2 can be greater than the horizontal distance W1 between the third voltage line 193_2 and the second electrode 220_2. The description is the same as above.

[0211] In the same aspect, a horizontal distance W1 between the fourth electrode 240_2 or the fourth electrode line 240'_2 and the fourth voltage line 194_2 disposed below the third inner bank 430_2 can be formed to be smaller than a horizontal distance W2 between the fourth electrode 240_2 or the fourth electrode line 240'_2 and the third electrode line 230'_2 or the third electrode 230_2. Furthermore, a horizontal distance W1 between the third electrode 230_2 or the third electrode line 230'_2 and the first voltage line 191_2 disposed below the first inner bank 410_2 can be formed to be smaller than a horizontal distance W2 between the third electrode 230_2 or the third electrode line 230'_2 and the first electrode line 210'_2 or the first electrode 210_2. According to one embodiment, the third electrode 230_2 can be disposed so as to cover one side of the third inner bank 430_2, and the fourth voltage line 194_2 can overlap in a thickness direction with the other side of the third inner bank 430_2 on which the third electrode 230_2 is not disposed. At the other side of the third inner bank 430_2 , the fourth voltage line 194_2 may not overlap the third electrode 230_2 in the thickness direction.

[0212] Next, refer to Figure 25 and Figure 26 , the light-emitting elements 300 are also aligned in each of the second alignment area AA2 and the third alignment area AA3. In the drawings, the light-emitting elements 300 are shown as being aligned in each of the alignment areas AA1, AA2, and AA3 using different processes, but the present invention is not limited thereto. In some cases, the light-emitting elements 300 arranged in the first alignment area AA1, the second alignment area AA2, and the third alignment area AA3 can be aligned simultaneously in the same process.

[0213] Thereafter, although not shown in the drawings, the light emitting element 300 may be manufactured by forming a third insulating layer 520, a first contact electrode 261_2, a second contact electrode 262_2, a third contact electrode 263_2, a fourth contact electrode 264_2, a fourth insulating layer 530, and a fifth insulating layer 550. Figure 19 A detailed description thereof will be omitted.

[0214] Furthermore, the display device 10_2 may include a greater number of first electrodes 210 and second electrodes 220 , so that a greater number of light emitting elements 300 may be provided for each sub-pixel PXn and a greater number of light emitting elements 300 may be connected in parallel.

[0215] Figure 27 is a plan view showing one sub-pixel of a display device according to still another embodiment.

[0216] Reference Figure 27 The display device 10_3 according to one embodiment may include a plurality of first inner banks 410_3, a plurality of second inner banks 420_3, a plurality of first electrodes 210_3, and a plurality of second electrodes 220_3, and a plurality of light emitting elements 300 may be disposed therebetween. Figure 2 The embodiment of FIG. 1 is different in that a greater number of inner banks 410_3 and 420_3 and electrodes 210_3 and 220_3 are included. Hereinafter, repeated descriptions will be omitted, and descriptions will be provided based on differences from the above.

[0217] exist Figure 27 In the display device 10_3, a plurality of first inner banks 410_3 and a plurality of second inner banks 420_3 may be provided, and the plurality of first inner banks 410_3 and the plurality of second inner banks 420_3 may be alternately provided in the first direction DR1 in the sub-pixel PXn. In addition, a plurality of first electrodes 210_3 and a plurality of second electrodes 220_3 may be provided, and the plurality of first electrodes 210_3 and the plurality of second electrodes 220_3 may be alternately provided in the first direction DR1. This embodiment may be understood as one in which Figure 2 In this embodiment, a pair of inner banks 410_3 and 420_3 and a pair of electrodes 210_3 and 220_3 are further provided in a subpixel PXn. Similarly, a pair of first contact electrodes 261_3 and second contact electrodes 262_3 may also be provided. Although not shown in the drawings, the second data conductive layer may further include a greater number of first voltage lines 191 and second voltage lines 192. In this embodiment, each subpixel PXn has a larger area and is provided with a greater number of electrodes, thereby increasing the number of light-emitting elements 300 provided per unit subpixel PXn. Each of the light-emitting elements 300 can be connected in parallel, and the amount of light emitted per unit subpixel PXn can be increased.

[0218] Meanwhile, in some embodiments, each of the first electrode 210 and the second electrode 220 may further include a stem portion extending in the first direction DR1 .

[0219] Figure 28is a plan view showing one pixel of a display device according to still another embodiment.

[0220] Reference Figure 28 In the display device 10_4 according to one embodiment, the second electrode 220_4 may include a second electrode trunk portion 220S_4 extending in the first direction DR1 and a second electrode branch portion 220B_4 branched from the second electrode trunk portion 220S_4 in the second direction DR2. Figure 2 The embodiment of the present invention is different in that the shape of the second electrode 220_4 is different. Hereinafter, repeated descriptions will be omitted and descriptions will be provided based on the differences from the above.

[0221] exist Figure 28 In the display device 10_4, the second electrode 220_4 may include a second electrode trunk portion 220S_4. The second electrode trunk portion 220S_4 may be arranged to extend in the first direction DR1 to intersect with adjacent sub-pixels PXn, and adjacent sub-pixels PXn or pixels PX in the first direction DR1 may share one second electrode trunk portion 220S_4. A second electrode branch portion 220B_4 branched from the second electrode trunk portion 220S_4 may be arranged in each of the sub-pixels PXn. The second electrode branch portion 220B_4 may be arranged on the second inner bank 420 and may be spaced apart from and face the first electrode 210. That is, Figure 28 The second electrode branch portion 220B_4 can be connected to Figure 2 The second electrodes 220 are substantially the same.

[0222] The second electrode stem portion 220S_4 may extend in the first direction DR1 and may also be disposed in the non-display area NDA located at the peripheral portion of the display area DPA. Although not shown in the drawings, Figure 2 Unlike the embodiment of the present invention, the second electrode contact hole CNTS is not formed for each sub-pixel PXn ( Figure 2 ), and the second electrode 220_4 can be electrically connected to the second voltage line 192 through a second electrode contact hole CNTS formed in the non-display area NDA. In the display device 10_4 according to this embodiment, sub-pixels PXn that share a second electrode trunk portion 220S_4 can receive the same electrical signal (e.g., the second power supply voltage VSS) through the second electrode 220_4. In this case, the second voltage line 192 may not be provided for each sub-pixel PXn.

[0223] Figure 29 is a plan view showing one sub-pixel of a display device according to still another embodiment. Figure 30 It is along Figure 29A cross-sectional view taken along line II-II'.

[0224] Reference Figure 29 and Figure 30 , the display device 10_5 according to one embodiment may include a plurality of first inner banks 410_5, and the second inner bank 420_5 may be provided between the plurality of first inner banks 410_5. In addition, the first electrode 210_5 may include a first electrode trunk portion 210S_5 and a first electrode branch portion 210B_5, and the second electrode 220_5 may be provided between the first electrode branch portions 210B_5. This embodiment is different from Figure 2 and Figure 3 The embodiment of the present invention is different in that a plurality of first inner banks 410_5 and first electrodes 210_5 are further included. Hereinafter, repeated descriptions will be omitted and descriptions will be provided based on differences from the above contents.

[0225] Figure 29 and Figure 30 The display device 10_5 may include a plurality of first inner banks 410_5, and the second inner bank 420_5 may be provided between the plurality of first inner banks 410_5. That is, the first inner bank 410_5 and the second inner bank 420_5 are alternately provided in each sub-pixel PXn, and may be spaced apart from each other and face each other. Alignment areas AA, which are areas in which the light-emitting elements 300 are provided, may be formed between the first inner bank 410_5 and the second inner bank 420_5, and between the second inner bank 420_5 and the first inner bank 410_5, so that a greater number of light-emitting elements 300 may be provided. That is, the present embodiment may be understood as one in which Figure 2 and Figure 3 In the embodiment of the embodiment, a first inner bank 410_5 spaced apart from one side of the second inner bank 420_5 in the first direction DR1 is further provided on one side of the second inner bank 420_5.

[0226] The first electrode 210_5 may include a first electrode trunk portion 210S_5 extending in a first direction DR1 and a plurality of first electrode branch portions 210B_5 branching from the first electrode trunk portion 210S_5 in a second direction DR2. The first electrode branch portions 210B_5 may be disposed on the first inner bank 410_5 and may be connected to each other through the first electrode trunk portion 210S_5. The first electrode 210_5 is electrically connected to the first transistor 120 via a first electrode contact hole CNTD in a region overlapping the outer bank 450.

[0227] Both sides of the second electrode 220_5 may be spaced apart from and face each of the first electrode branch portions 210B_5. That is, this embodiment may be understood as one in which Figure 2 and Figure 3 In an embodiment, a first electrode branch portion 210B_5 spaced apart from one side of the second electrode 220_5 in the first direction DR1 is further provided on one side of the second electrode 220_5, and the first electrode branch portions 210B_5 are electrically connected to each other through the first electrode trunk portion 210S_5.

[0228] In addition, the first contact electrodes 261_5 may be respectively disposed on the first electrode branch portions 210B_5. Figure 2 Differently, a greater number of first contact electrodes 261_5 may be provided.

[0229] Light-emitting elements 300 are arranged in each of alignment areas AA1 and AA2 formed between the first inner bank 410_5 and the second inner bank 420_5. At least one end of each light-emitting element 300 is electrically connected to the first electrode branch portion 210B_5 via the first contact electrode 261_5. In this embodiment, the light-emitting elements 300 arranged in different areas can each be electrically connected to the first electrode branch portion 210B_5 at at least one end, thereby simultaneously receiving electrical signals from the first electrode 210_5. Furthermore, the other end of each light-emitting element 300 arranged in the different alignment areas AA1 and AA2 can contact the second contact electrode 262_5. According to one embodiment, the width of the second contact electrode 262_5 measured in one direction can be formed to be larger than the width of the second electrode 220_5 measured in one direction, and the second contact electrode 262_5 can be arranged to cover the second electrode 220_5. The light-emitting elements 300 disposed in different alignment areas AA1 and AA2 can be electrically connected to the second electrode 220_5 through the second contact electrode 262_5 and can simultaneously receive an electrical signal from the second voltage line 192. That is, the light-emitting elements 300 of this embodiment can be connected in parallel. Except for the above description, the description of other components is the same as the above description, and therefore a detailed description thereof will be omitted.

[0230] In summarizing the detailed description, it will be appreciated by those skilled in the art that many changes and modifications may be made to the preferred embodiments without departing substantially from the principles of the invention. Therefore, the disclosed preferred embodiments of the invention are used in a generic and descriptive sense only and not for purposes of limitation.

Claims

1. A display device, comprising: substrate; a first inner bank and a second inner bank provided on the substrate to be spaced apart from each other; a first electrode and a second electrode, wherein the first electrode is disposed on a partial region of the first inner bank away from the second inner bank, and the second electrode is disposed to cover the second inner bank, and the first electrode and the second electrode are spaced apart from each other in a plan view; as well as a light-emitting element disposed between the first electrode and the second electrode, wherein one end portion of the light emitting element close to the first inner bank does not overlap with the first electrode in the thickness direction of the substrate, and The other end portion of the light emitting element close to the second inner bank overlaps the second electrode in the thickness direction.

2. The display device according to claim 1, further comprising: a first contact electrode in contact with the first electrode and the one end portion of the light emitting element; as well as The second contact electrode is in contact with the second electrode and the other end portion of the light emitting element.

3. The display device according to claim 2, wherein: The one end portion of the light emitting element overlaps the first contact electrode in the thickness direction, and The other end portion of the light emitting element overlaps the second contact electrode in the thickness direction.

4. The display device according to claim 1, wherein A separation distance between the first electrode and the second electrode is greater than a separation distance between the first inner bank and the second inner bank.

5. The display device according to claim 4, wherein The first inner embankment includes one side and the other side facing the second inner embankment, and The first electrode is provided to cover only the one side of the first inner bank. The display device according to claim 5 , wherein: The second electrode is provided to cover one side of the second inner bank facing the first inner bank and the other side of the second inner bank.

7. The display device according to claim 1, further comprising: at least one third inner dike, disposed between the first inner dike and the second inner dike; as well as at least one third electrode, disposed between the first electrode and the second electrode, Wherein, the third electrode is arranged on a partial area of the third inner bank.

8. The display device according to claim 7, wherein: The third inner embankment includes one side facing the first inner embankment and the other side facing the second inner embankment, and The third electrode is provided to cover only the one side of the third inner bank.

9. The display device according to claim 7, further comprising a third contact electrode provided on the third electrode, in, A width of the third contact electrode measured in one direction is greater than a width of the third electrode measured in the one direction.

10. The display device according to claim 9, wherein The third contact electrode is in contact with a light emitting element provided between the first electrode and the third electrode and a light emitting element provided between the third electrode and the second electrode.

11. The display device according to claim 1 , further comprising: A first voltage line is provided on the substrate; as well as a first insulating layer, arranged to cover the first voltage line; Wherein, the first inner bank and the second inner bank are directly arranged on the first insulating layer.

12. The display device according to claim 11, wherein At least a portion of the first voltage line is disposed to overlap the first inner bank in the thickness direction, and A separation distance between the second electrode and the first electrode is greater than a separation distance between the second electrode and the first voltage line.

13. The display device according to claim 12, wherein: The first inner bank includes one side on which the first electrode is disposed and the other side on which the first electrode is not disposed and which overlaps the first voltage line in the thickness direction.

14. The display device according to claim 13 , further comprising a second insulating layer configured to cover the other side of the first inner bank and a side of the second electrode facing the first electrode, in, The light emitting element is disposed on the second insulating layer.

15. A display device, comprising: substrate; a first data conductive layer, comprising a source electrode and a drain electrode and disposed on the substrate; a second data conductive layer disposed on the first data conductive layer and comprising a first voltage line; a first insulating layer, configured to cover the second data conductive layer; a first electrode and a second electrode disposed on the first insulating layer to be spaced apart from each other and facing each other; as well as a light-emitting element disposed between the first electrode and the second electrode, The horizontal distance between the first electrode and the second electrode is greater than the horizontal distance between the second electrode and the first voltage line.

16. The display device according to claim 15, further comprising: a first inner bank, disposed on the first insulating layer; as well as a second inner embankment, spaced apart from and facing the first inner embankment, wherein the first electrode is arranged to cover one side of the first inner bank, and The second electrode is provided to cover one side of the second inner bank facing the first inner bank and the other side of the second inner bank.

17. The display device according to claim 16, wherein: The first voltage line overlaps the other side of the first inner bank facing the second inner bank in a thickness direction of the substrate.

18. The display device according to claim 16, further comprising: a first contact electrode in contact with the first electrode and one end portion of the light emitting element; as well as a second contact electrode in contact with the second electrode and the other end of the light emitting element; The one end portion of the light emitting element does not overlap with the first electrode in the thickness direction of the substrate, and the other end portion of the light emitting element overlaps with the second electrode in the thickness direction.

19. The display device according to claim 15, wherein: The second data conductive layer further includes a second voltage line different from the first voltage line. The first voltage line is electrically connected to the first electrode, and The second voltage line is electrically connected to the second electrode.

20. The display device according to claim 19, further comprising: a third electrode, disposed between the first electrode and the second electrode; as well as a third voltage line, provided between the first voltage line and the second voltage line, The horizontal distance between the second electrode and the third electrode is greater than the horizontal distance between the second electrode and the third voltage line.

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