Display device and method of manufacturing the same

Abstract

A display device and a manufacturing method thereof are provided. The display device includes a substrate and a display element layer on the substrate. The display element layer includes first and second electrodes extending along a first direction and spaced apart from each other in a second direction, and a light emitting element electrically connected to the first and second electrodes. The first electrode has a first protruding portion protruding toward the second electrode and a first recessed portion recessed in a direction away from the second electrode, and the second electrode has a second protruding portion protruding toward the first electrode and a second recessed portion recessed in a direction away from the first electrode. The light emitting element includes first and second light emitting elements close to the first and second recessed portions, respectively, based on a virtual extension line extending along the first direction between the first and second electrodes.

Description

[0001] This application claims priority and benefit to Korean Patent Application No. 10-2020-0003374, filed on January 9, 2020, with the Korean Intellectual Property Office, the entire contents of which are incorporated herein by reference for all purposes, as fully set forth herein. Technical Field

[0002] The exemplary embodiments of the present invention generally relate to a display device and a method of manufacturing the same. Background Technology

[0003] Light-emitting diodes (hereinafter referred to as LEDs) exhibit relatively good durability even under harsh environmental conditions, and also demonstrate excellent performance in terms of lifespan and brightness. Recently, research has been conducted on the application of LEDs in various display devices.

[0004] Techniques for fabricating ultrasmall rod-shaped LEDs (e.g., LEDs with a rod shape) having inorganic crystal structures (e.g., structures in which nitride semiconductors are grown) with micrometer-scale (e.g., about 1 μm to about 100 μm) or nanometer-scale (e.g., about 1 nm to about 100 nm) dimensions have been investigated. For example, rod-shaped LEDs can be fabricated to have a sufficiently small size to construct (e.g., form or be included in) pixels of a self-emissive display device.

[0005] The information disclosed above in this background section is only intended to facilitate an understanding of the background technology of the present invention, and therefore may contain information that does not constitute prior art known to those skilled in the art. Summary of the Invention

[0006] Embodiments of the present invention provide a display device with excellent alignment having a light-emitting element and a method for manufacturing the display device.

[0007] Embodiments of the present invention provide a display device comprising a substrate and a display element layer located on one surface of the substrate. The display element layer includes: a first electrode and a second electrode extending along a first direction and spaced apart from each other in a second direction different from the first direction; and a light-emitting element electrically connected to the first electrode and the second electrode. The first electrode has a first protruding portion protruding toward the second electrode in a plan view and a first recessed portion recessed in a direction away from the second electrode. The second electrode has a second protruding portion protruding toward the first electrode in a plan view and a second recessed portion recessed in a direction away from the first electrode. Based on a virtual extension line extending along the first direction between the first electrode and the second electrode, the light-emitting element includes a first light-emitting element near the first recessed portion and a second light-emitting element near the second recessed portion.

[0008] The first recessed portion and the second recessed portion can be arranged alternately along the first direction, and the first protruding portion and the second protruding portion can be arranged alternately along the first direction.

[0009] The first protruding part can face the second recessed part, and the second protruding part can face the first recessed part.

[0010] The first light-emitting element may be located between the first recessed portion and the second protruding portion, and the second light-emitting element may be located between the second recessed portion and the first protruding portion.

[0011] The display element layer may further include: a first contact electrode electrically connected to a light-emitting element; and a second contact electrode electrically connected to a light-emitting element.

[0012] The area where the first contact electrode and the first light-emitting element are stacked can be larger than the area where the second contact electrode and the first light-emitting element are stacked.

[0013] The area where the first contact electrode and the second light-emitting element are stacked can be smaller than the area where the second contact electrode and the second light-emitting element are stacked.

[0014] The display element layer may further include a first dike and a second dike located on the substrate, the first dike and the second dike extending along a first direction and spaced apart from each other along a second direction. A first electrode may be located on the first dike, and a second electrode may be located on the second dike.

[0015] The first dike may have a first dike protruding portion that protrudes toward the second dike in a plan view and a first dike recessed portion that is recessed in a direction away from the second dike. The second dike may have a second dike protruding portion that protrudes toward the first dike in a plan view and a second dike recessed portion that is recessed in a direction away from the first dike.

[0016] The first protruding portion can be stacked with the first embankment protruding portion and can have a shape corresponding to the planar shape of the first embankment protruding portion. The first recessed portion can be stacked with the first embankment recessed portion and can have a shape corresponding to the planar shape of the first embankment recessed portion. The second protruding portion can be stacked with the second embankment protruding portion and can have a shape corresponding to the planar shape of the second embankment protruding portion. The second recessed portion can be stacked with the second embankment recessed portion and can have a shape corresponding to the planar shape of the second embankment recessed portion.

[0017] The display element layer may also include an insulating layer covering the first electrode and the second electrode, and the light-emitting element may be located on the insulating layer.

[0018] The insulating layer may have a receiving portion located between the first electrode and the second electrode and recessed towards the substrate in a third-order upward direction. The light-emitting element may be located on the receiving portion of the insulating layer.

[0019] The thickness of the insulation layer at the receiving portion in the third direction may be equal to or less than half the thickness of the first and second dikes in the third direction.

[0020] The second recessed portion may have a first sub-recessed portion arranged alternately with the first recessed portion along a first direction and a second sub-recessed portion facing the first recessed portion.

[0021] The light-emitting element may also include a third light-emitting element between the first recessed portion and the second sub-recessed portion.

[0022] The first and second protrusions can have polygonal shapes or rounded curved shapes.

[0023] Each of the first electrode and the second electrode may have at least two widths along the first direction.

[0024] The first and second protruding portions can have non-square boundaries.

[0025] The region between the first electrode and the second electrode may have a width that is not constant along the first direction.

[0026] Embodiments of the present invention provide a method for manufacturing a display device. The method includes: forming a first dam and a second dam on a substrate, the first dam and the second dam extending along a first direction and spaced apart from each other along a second direction different from the first direction; forming a first electrode on the first dam and a second electrode on the second dam, the first electrode having a first protruding portion protruding toward the second electrode in a plan view and a first recessed portion recessed in a direction away from the second electrode, the second electrode having a second protruding portion protruding toward the first electrode in a plan view and a second recessed portion recessed in a direction away from the first electrode; after forming the first electrode and the second electrode, disposing a light-emitting element on the substrate; and disposing the light-emitting element between the first electrode and the second electrode by applying an alignment signal to the first electrode and the second electrode. The disposed light-emitting element includes a first light-emitting element near the first recessed portion and a second light-emitting element near the second recessed portion.

[0027] The steps of forming the first dike and the second dike may include: forming a first dike protruding portion that protrudes toward the second dike in a plan view and a first dike recessed portion that is recessed in a direction away from the second dike in the first dike; and forming a second dike protruding portion that protrudes toward the first dike in a plan view and a second dike recessed portion that is recessed in a direction away from the first dike in the second dike.

[0028] The method of manufacturing a display device may further include: forming an insulating layer covering a first electrode and a second electrode, and forming a receiving portion in the insulating layer between the first electrode and the second electrode. The receiving portion may be recessed toward the substrate in a third-party upward direction.

[0029] The method of manufacturing a display device may further include forming a first contact electrode that electrically connects a first electrode and a light-emitting element, and a second contact electrode that electrically connects a second electrode and a light-emitting element.

[0030] According to embodiments of the present invention, a display device with excellent alignment having a light-emitting element and a method for manufacturing the display device are provided.

[0031] According to an embodiment of the present invention, a first recessed portion in a first electrode and a second recessed portion in a second electrode are arranged alternately, thereby effectively reducing the number of unarranged light-emitting elements.

[0032] However, the present invention is not limited to the above aspects and features, and various extensions, changes and / or variations can be made to the embodiments of the present invention without departing from the spirit and scope of the present invention. Attached Figure Description

[0033] Figure 1A and Figure 1B Perspective views of light-emitting elements according to embodiments of the present invention are shown.

[0034] Figure 2A and Figure 2B Circuit diagrams of the unit light-emitting areas of a display device according to embodiments of the present invention are shown.

[0035] Figure 3 A top view of a display device according to an embodiment of the present invention is shown.

[0036] Figure 4 A top view of a display element layer according to an embodiment of the present invention is shown.

[0037] Figure 5A It shows along Figure 4 A cross-sectional view taken by line I-I'. Figure 5B It shows along Figure 4 The sectional view taken from line II-II'.

[0038] Figure 6 A top view of a display element layer according to another embodiment of the present invention is shown.

[0039] Figure 7A It shows along Figure 6 The sectional view taken from line III-III'. Figure 7B It shows along Figure 6A sectional view taken from line IV-IV'.

[0040] Figure 8 A top view of a display element layer according to another embodiment of the present invention is shown.

[0041] Figure 9A It shows along Figure 8 A cross-sectional view taken by line V-V'. Figure 9B It shows along Figure 8 A sectional view taken from line VI-VI'.

[0042] Figure 10 A top view of a display element layer according to another embodiment of the present invention is shown.

[0043] Figures 11A to 11D A top view of a display element layer according to various embodiments of the present invention is shown.

[0044] Figure 12 A cross-sectional view of a display device according to an embodiment of the present invention is shown.

[0045] Figures 13A to 13H This is a top view showing a method for manufacturing a display device according to an embodiment of the present invention.

[0046] Figures 14A to 14I It is shown in sequence according to Figures 13A to 13H A cross-sectional view of a method for manufacturing a display device according to an embodiment shown. Detailed Implementation

[0047] Because this invention can be implemented in various forms and can be modified in various ways, exemplary embodiments of the invention will be shown and described in detail below. However, the invention is not limited to the exemplary embodiments described herein, and this disclosure will be understood to include the invention and all changes, equivalents, and substitutions within the spirit and scope of the invention.

[0048] Throughout the disclosure, the same reference numerals indicate the same elements. In the drawings, the dimensions of structures, layers, components, openings, etc., may be exaggerated for clarity.

[0049] It will be understood that when an element or layer is referred to as being "on," "connected to," or "bonded to" another element or layer, the element or layer may be directly on, directly connected to, or directly bonded to the other element or layer, or one or more intermediate elements or layers may be present. When an element or layer is referred to as being "directly on," "directly connected to," or "directly bonded to" another element or layer, no intermediate elements or layers are present. For example, when a first element is described as being "bonded" or "connected" to a second element, the first element may be directly bonded to or connected to the second element, or the first element may be indirectly bonded to or connected to the second element via one or more intermediate elements.

[0050] As used herein, the term “and / or” includes any and all combinations of one or more of the associated listed items. Furthermore, when describing embodiments of the invention, the use of “may” refers to “one or more embodiments of the invention.” Expressions such as “at least one of…” modify the entire list of elements when following a list, without modifying individual elements within that list. As used herein, the term “use” and its variations may be considered synonymous with the term “utilize” and its variations, respectively. As used herein, the terms “substantially,” “about,” and similar terms are used as approximate terms rather than terms of degree and are intended to account for inherent variations in measured or calculated values ​​that will be recognized by one of ordinary skill in the art.

[0051] Terms such as "first," "second," etc., will only be used to describe various constituent elements, layers, etc., and will not be construed as limiting these constituent elements, layers, etc. These terms are only used to distinguish one constituent element, layer, etc., from other constituent elements, layers, etc. For example, without departing from the scope of the invention, a first constituent element may be referred to as a second constituent element, and similarly, a second constituent element may be referred to as a first constituent element.

[0052] For ease of description, spatial relative terms such as “below,” “under,” “down,” “above,” and “above” are used herein to describe the relationship between one element or feature and another (other) element or feature as shown in the figure. It will be understood that spatial relative terms are intended to cover different orientations of the device in use or operation, in addition to those depicted in the figure. For example, if the device in the figure is flipped, an element described as “below” or “under” other elements or features would be positioned “above” or “above” other elements or features. Therefore, the term “below” can cover both above and below orientations. The device may be otherwise positioned (rotated 90 degrees or in other orientations), and the spatial relative descriptors used herein should be interpreted accordingly.

[0053] The terminology used herein is for the purpose of describing specific exemplary embodiments of the invention and is not intended to limit the exemplary embodiments described herein. As used herein, unless the context clearly indicates otherwise, the singular forms “a” and “an” are also intended to include the plural forms. It will also be understood that the terms “comprising,” “including,” “having,” and variations thereof, when used in this specification, indicate the presence of the stated features, integrals, steps, operations, elements, and / or components, but do not preclude the presence or addition of one or more other features, integrals, steps, operations, elements, components, and / or groups thereof.

[0054] In the following description, embodiments of the present invention will be illustrated in detail with reference to the accompanying drawings.

[0055] Figure 1A and Figure 1B Perspective views of light-emitting elements according to embodiments of the present invention are shown. Figure 1A and Figure 1B The image shows a cylindrical light-emitting element (LD) (e.g., a light-emitting element having a cylindrical shape), but the present invention is not limited thereto.

[0056] Reference Figure 1A and Figure 1B According to an embodiment of the present invention, the light-emitting element LD may include a first semiconductor layer 11, a second semiconductor layer 13 and an active layer 12 disposed between the first semiconductor layer 11 and the second semiconductor layer 13.

[0057] For example, the light-emitting element LD can be implemented as a stack in which a first semiconductor layer 11, an active layer 12, and a second semiconductor layer 13 are stacked sequentially on top of each other.

[0058] According to an embodiment of the present invention, the light-emitting element LD can have a rod shape extending in one direction. When the extending direction of the light-emitting element LD is referred to as the length direction, the light-emitting element LD can be provided with one end and another end along the length direction.

[0059] In an embodiment of the present invention, one of the first semiconductor layer 11 and the second semiconductor layer 13 may be disposed at one end (e.g., the first portion), and the other of the first semiconductor layer 11 and the second semiconductor layer 13 may be disposed at the other end (e.g., the second portion).

[0060] Light-emitting elements (LDs) are not limited to Figure 1A and Figure 1BThe cylindrical shape shown can have various suitable shapes. For example, the light-emitting element (LD) can have a rod-like or strip-like shape that is long in the longitudinal direction (e.g., extending in the longitudinal direction) (e.g., having an aspect ratio greater than 1). In embodiments of the invention, the length L of the light-emitting element LD in the longitudinal direction can be larger than the diameter D (or the width of the cross-section of the light-emitting element LD). The light-emitting element LD can include (or can be) a light-emitting diode, for example, having an ultra-small size with a diameter D and / or length L on the micrometer or nanometer scale. In embodiments of the invention, the dimensions of the light-emitting element LD can be changed (or selected) to meet the requirements (or design conditions) of the lighting device or self-emissive display device in which the light-emitting element LD will be applied.

[0061] For example, the first semiconductor layer 11 may include at least one n-type semiconductor layer. For example, the first semiconductor layer 11 may include at least one semiconductor material (such as InAlGaN, GaN, AlGaN, InGaN, AlN, and InN), and may include a semiconductor layer doped with a first conductive dopant (such as Si, Ge, Sn, etc.). However, the materials included in the first semiconductor layer 11 are not limited thereto, and the first semiconductor layer 11 may be formed of (or may include) various suitable materials.

[0062] The active layer 12 is formed on the first semiconductor layer 11 and may have a single quantum well structure or a multiple quantum well structure. In various embodiments of the invention, a capping layer doped with a conductive dopant may be formed in the upper and / or lower portion of the active layer 12. For example, the capping layer may be implemented as an AlGaN layer or an InAlGaN layer. Furthermore, materials such as AlGaN and AlInGaN may also be used as (or included in) the active layer 12.

[0063] When an electric field with a reference voltage (e.g., a predetermined voltage) or greater is applied to the two ends (e.g., opposite ends) of the light-emitting element LD, the light-emitting element LD emits light as electron-hole pairs combine in the active layer 12.

[0064] The second semiconductor layer 13 is disposed on the active layer 12 and may include a semiconductor layer of a different type than the first semiconductor layer 11. For example, the second semiconductor layer 13 may include at least one p-type semiconductor layer. For example, the second semiconductor layer 13 may include at least one semiconductor material (such as InAlGaN, GaN, AlGaN, InGaN, AlN, and InN), and may include a semiconductor layer doped with a second conductive dopant (such as Mg). However, the materials included in the second semiconductor layer 13 are not limited thereto, and the second semiconductor layer 13 may be formed of various suitable materials.

[0065] According to an embodiment of the present invention, the light-emitting element LD may further include a phosphor layer, another active layer, another semiconductor layer and / or an electrode in the upper and / or lower portions of each of the first semiconductor layer 11, the active layer 12 and the second semiconductor layer 13 as described above.

[0066] As an example, the light-emitting element LD may also include at least one electrode disposed at one end side (e.g., the upper surface) of the second semiconductor layer 13 or at one end side (e.g., the lower surface) of the first semiconductor layer 11.

[0067] For example, refer to Figure 1B The light-emitting element LD may further include an electrode 15 disposed at one end of the second semiconductor layer 13. The electrode 15 may be an ohmic contact electrode, but is not limited thereto. In some embodiments, the electrode 15 may be a Schottky contact electrode. Furthermore, the electrode 15 may include a metal or a metal oxide. For example, the electrode 15 may include chromium (Cr), titanium (Ti), aluminum (Al), gold (Au), nickel (Ni), and ITO, and their oxides or alloys may be used alone or in combination, but the invention is not limited thereto. In addition, in some embodiments, the electrode 15 may be substantially transparent or transmissive-reflective. Therefore, light generated by the light-emitting element LD can pass through the electrode 15 and can be emitted to the outside of the light-emitting element LD.

[0068] In addition, the light-emitting element LD may also include an insulating film 14. However, in some embodiments, the insulating film 14 may be omitted, or the insulating film 14 may be configured to cover only some (e.g., a portion) of the first semiconductor layer 11, the active layer 12, and the second semiconductor layer 13.

[0069] For example, the insulating film 14 can be disposed in a portion other than the two ends of the light-emitting element LD, such that the two ends of the light-emitting element LD are exposed (e.g., exposed by or through the insulating film 14).

[0070] For ease of description, Figure 1A and Figure 1B The structure of a portion of the insulating film 14 not shown is illustrated (e.g., a portion of the insulating film 14 is shown in cross-section), but in practice, the insulating film 14 may surround the entire side surface of the light-emitting element LD (or extend around the entire side surface of the light-emitting element LD).

[0071] The insulating film 14 may be configured to partially surround the outer circumferential surface of the first semiconductor layer 11, the active layer 12, and / or the second semiconductor layer 13. For example, the insulating film 14 may be configured to at least surround the outer circumferential surface of the active layer 12. Furthermore, when the light-emitting element LD includes an electrode 15, the insulating film 14 may be configured to surround at least a portion of the outer circumferential surface of the electrode 15.

[0072] According to embodiments of the present invention, the insulating film 14 may comprise a transparent insulating material. For example, the insulating film 14 may comprise one or more insulating materials selected from the group consisting of SiO2, Si3N4, Al2O3, and TiO2, but the insulating film 14 is not limited thereto. Various suitable insulating materials may be used for the insulating film 14.

[0073] When the insulating film 14 is disposed on the light-emitting element LD, the active layer 12 may not be short-circuited with the first electrode and / or the second electrode, which are described in more detail below.

[0074] Furthermore, by forming the insulating film 14, surface defects of the light-emitting element LD (e.g., surface defects in the light-emitting element LD) can be reduced or minimized, thereby improving the lifespan and efficiency of the light-emitting element LD. Additionally, when multiple light-emitting elements LD are closely arranged, the insulating film 14 can prevent (or reduce) unwanted short circuits between the light-emitting elements LD.

[0075] The light-emitting element (LD) described above can be used as a light source for various display devices. For example, the LD can be used as a light source element for lighting devices or self-emissive display devices.

[0076] Figure 2A and Figure 2B Circuit diagrams of the unit light-emitting regions of a display device according to embodiments of the present invention are shown. More specifically, Figure 2A and Figure 2B Examples of pixels in an active light-emitting display panel are shown. In embodiments of the invention, a unit light-emitting region may be a pixel region in which a sub-pixel is disposed (e.g., a unit light-emitting region may be a sub-pixel).

[0077] Reference Figure 2A Subpixel SP may include one or more light-emitting elements LD and pixel driving circuit 144 connected to the light-emitting elements LD to drive the light-emitting elements LD.

[0078] The first electrode (e.g., anode) of the light-emitting element LD is connected to the first driving power supply VDD via the pixel driving circuit 144, and the second electrode (e.g., cathode) of the light-emitting element LD is connected to the second driving power supply VSS.

[0079] The first driving power supply VDD and the second driving power supply VSS can have different potentials. For example, the second driving power supply VSS can have a lower potential than the first driving power supply VDD, but this lower potential is greater than the threshold voltage of the light-emitting element LD.

[0080] Each of the light-emitting elements (LDs) can emit light with a brightness corresponding to the driving current controlled by the pixel driving circuit 144.

[0081] Although Figure 2A An embodiment in which only one light-emitting element (LD) is included in the sub-pixel SP is shown, but the invention is not limited thereto. For example, the sub-pixel SP may include multiple light-emitting elements (LDs) connected in parallel with each other.

[0082] According to an embodiment of the present invention, the pixel driving circuit 144 may include a first transistor T1, a second transistor T2, and a storage capacitor Cst. However, the structure of the pixel driving circuit 144 is not limited to this. Figure 2A and Figure 2B The embodiment shown.

[0083] The first electrode of the first transistor (e.g., a driver transistor) T1 is connected to the first drive power supply VDD, and the second electrode of the first transistor (e.g., a driver transistor) T1 is electrically connected to the first electrode of each of the light-emitting elements LD. The gate electrode of the first transistor T1 is connected to the first node N1. The first transistor T1 controls the amount of drive current supplied to the light-emitting element LD in response to the voltage at the first node N1.

[0084] The first electrode of the second transistor (e.g., a switching transistor) T2 is connected to the data line DL, and the second electrode of the second transistor T2 is connected to the first node N1. Here, the first and second electrodes of the second transistor T2 are different electrodes; for example, when the first electrode is the source electrode, the second electrode is the drain electrode. Furthermore, the gate electrode of the second transistor T2 is connected to the scan line SL.

[0085] When a scan signal with a voltage (e.g., a low voltage) at which the second transistor T2 can conduct is supplied from the scan line SL, the second transistor T2 conducts to electrically connect the data line DL and the first node N1. In this case, the data signal corresponding to the frame is supplied to the data line DL, and therefore, the data signal is transmitted to the first node N1. The data signal transmitted to the first node N1 is charged into the storage capacitor Cst.

[0086] One electrode of the storage capacitor Cst is connected to the first drive power supply VDD, and the other electrode of the storage capacitor Cst is connected to the first node N1. The storage capacitor Cst is charged with a voltage corresponding to the data signal supplied to the first node N1, and the charged voltage is maintained until the data signal of the next frame is supplied.

[0087] For convenience, Figure 2AThe pixel driving circuit 144 shown is illustrated with a relatively simple structure in which a second transistor T2 transmits data signals inside the sub-pixel SP, a storage capacitor Cst stores the data signals, and a first transistor T1 provides a driving current corresponding to the data signals to the light-emitting element LD.

[0088] However, the present invention is not limited thereto, and the structure of the pixel driving circuit 144 can be modified in various ways. For example, the pixel driving circuit 144 may additionally include at least one transistor element (e.g., at least one transistor) (such as a transistor element for compensating the threshold voltage of the first transistor T1, a transistor element for initializing the first node N1, and / or a transistor element for controlling the emission time of the light-emitting element LD, etc.), and other circuit elements (such as a boost capacitor for boosting the voltage of the first node N1).

[0089] also, Figure 2A The transistors included in the pixel driving circuit 144 (e.g., both the first transistor T1 and the second transistor T2) are shown as p-type transistors, but the invention is not limited thereto. That is, at least one of the first transistor T1 and the second transistor T2 included in the pixel driving circuit 144 can be an n-type transistor.

[0090] Reference Figure 2B According to embodiments of the present invention, the first transistor T1 and the second transistor T2 can be implemented as n-type transistors. Besides the change in the connection positions of some constituent elements (e.g., the connection position of the storage capacitor Cst) due to the different transistor types, Figure 2B The structure and / or operation of the pixel driving circuit 144 shown are similar to Figure 2A The pixel driving circuit 144 shown has a similar structure and / or operation. Therefore, its detailed description will be omitted.

[0091] Figure 3 A top view of a display device according to an embodiment of the present invention is shown. Specifically, Figure 3 It includes Figure 1A or Figure 1B The diagram shows a schematic top view of a display device in which the light-emitting element LD serves as the light source.

[0092] Reference Figure 1A , Figure 1B and Figure 3 The display device according to an embodiment of the present invention may include a substrate SUB, a pixel PXL disposed on one surface of the substrate SUB, a driver disposed on the substrate SUB to drive the pixel PXL, and a wiring portion (e.g., wiring) connecting the pixel PXL to the driver.

[0093] Depending on the method of driving the light-emitting element (LD), the display device can be a passive matrix display device or an active matrix display device. For example, when the display device is implemented as an active matrix display device, each of the pixels PXL may include a driving transistor for controlling the amount of current supplied to the light-emitting element (LD), a switching transistor for transmitting data signals to the driving transistor, etc.

[0094] Active matrix display devices, in which each pixel PXL is selectively turned on, offer good resolution, contrast, and operating speed, and have therefore become mainstream. However, the present invention is not limited thereto, and passive matrix display devices that perform light emission for each pixel group can also use the constituent elements for driving the light-emitting elements LD (e.g., the first and second electrodes described below).

[0095] The substrate SUB may have a display area DA and a non-display area NDA. The display area DA may be an area in which pixels PXL for displaying images are disposed. The non-display area NDA may be an area in which a driver for driving pixels PXL and a portion of the wiring connecting the driver and pixels PXL are disposed.

[0096] Pixels PXL can be disposed on the substrate SUB within the display area DA. Each of the pixels PXL can be configured as multiple units for displaying images (e.g., pixels PXL can correspond to sub-pixels, such that multiple pixels PXL together form a light-emitting unit). Pixels PXL may include light-emitting elements LD that emit white light and / or colored light. Each pixel PXL can emit light of one of red, green, and blue, but the invention is not limited thereto. For example, each pixel PXL can emit light of one of cyan, magenta, yellow, and white.

[0097] Multiple pixels PXL can be configured, arranged in a matrix form along columns extending in a first direction DR1 and rows extending in a second direction DR2 that intersects (e.g., is perpendicular to) the first direction DR1. However, there are no specific limitations on the arrangement (or construction) of the pixels PXL, and the pixels PXL can be arranged in various suitable forms.

[0098] The driver can provide signals to each pixel PXL through the wiring section, thus controlling the driving of the pixel PXL. Figure 3 For ease of description, the wiring section is not shown.

[0099] The driver may include a scan driver (SDV) that provides scan signals to pixel PXL via scan lines, an emissive driver that provides emissive control signals to pixel PXL via emissive control lines, a data driver (DDV) that provides data signals to pixel PXL via data lines, and a timing controller. The timing controller can control the scan driver (SDV), the emissive driver, and the data driver (DDV).

[0100] The display device according to embodiments of the present invention can be applied to various electronic devices. For example, the display device can be applied to televisions, laptops, mobile phones, smartphones, smart tablets (PDs), PMPs, PDAs, navigation devices, and various wearable devices (such as smartwatches).

[0101] Figure 4 A top view of a display element layer according to an embodiment of the present invention is shown. Figure 5A It shows along Figure 4 A cross-sectional view taken by line I-I'. Figure 5B It shows along Figure 4 The sectional view taken from line II-II'.

[0102] exist Figure 4 In this configuration, the light-emitting element LD is arranged parallel to the second direction DR2, but the arrangement of the light-emitting element LD is not limited to this. For example, the light-emitting element LD can be arranged to be tilted at a certain angle (e.g., a predetermined angle) relative to the second direction DR2 between the first electrode EL1 and the second electrode EL2.

[0103] like Figures 4 to 5B As shown, the display element layer DPL according to an embodiment of the present invention may include a first dam BNK1 and a second dam BNK2 disposed on a substrate SUB, a first electrode EL1 and a second electrode EL2, an insulating layer INS, a light-emitting element LD, an insulating pattern INSP, a first contact electrode CNT1 and a second contact electrode CNT2.

[0104] The substrate SUB can be a rigid substrate or a flexible substrate.

[0105] Rigid substrates may include (or may be) glass substrates, quartz substrates, glass-ceramic substrates and / or crystalline glass substrates.

[0106] The flexible substrate may include (or may be) a membrane substrate comprising an organic polymer material and / or a plastic substrate. For example, the flexible substrate may include one of polyethersulfone (PES), polyacrylate, polyetherimide (PEI), polyethylene naphthalate (PEN), polyethylene terephthalate (PET), polyphenylene sulfide (PPS), polyarylate (PAR), polyimide (PI), polycarbonate (PC), cellulose triacetate (TAC), and cellulose acetate propionate (CAP). Furthermore, the flexible substrate may include glass fiber reinforced plastic (FRP).

[0107] The substrate SUB (e.g., the material forming the substrate SUB) can have resistance to high processing temperatures (e.g., heat resistance) during the manufacturing process of the display device. In various embodiments of the invention, the substrate SUB can be entirely or at least partially flexible (e.g., the entire substrate SUB can be flexible or one or more portions of the substrate SUB can be flexible).

[0108] The display element layer (DPL) may include a buffer layer disposed on (e.g., formed on) the substrate (SUB) (see, for example, see...). Figure 12 For example, the first dam BNK1 and the second dam BNK2, the first electrode EL1 and the second electrode EL2, the insulating layer INS, the light-emitting element LD, the insulating pattern INSP, and the first contact electrode CNT1 and the second contact electrode CNT2 described above can be disposed on the buffer layer.

[0109] A buffer layer prevents or substantially prevents impurities from diffusing into the light-emitting element (LD). The buffer layer can be a single layer, but in other embodiments, it can be a multilayer layer comprising two or more layers. When a multilayer buffer layer is provided, the individual layers can be formed of the same material or different materials. In some embodiments, the buffer layer may be omitted depending on the material of the substrate SUB and the processing conditions.

[0110] The first electrode EL1 and the second electrode EL2 can be disposed on the substrate SUB, extending along the first direction DR1 and spaced apart from each other along the second direction DR2. The light-emitting element LD can be electrically connected to the first electrode EL1 and the second electrode EL2.

[0111] like Figures 4 to 5BAs shown, the first electrode EL1 may include a first protruding portion VP1 protruding toward the second electrode EL2 in a plan view (e.g., the first protruding portion VP1 may protrude toward the second electrode EL2 in a positive second direction DR2) and a first recessed portion CP1 recessed in a direction opposite to the direction of the first protruding portion VP1 (e.g., the first recessed portion CP1 may be recessed away from the second electrode EL2 in a negative second direction DR2). Based on the second direction DR2, the first protruding portion VP1 may protrude in a direction from the first electrode EL1 toward the second electrode EL2, and the first recessed portion CP1 may be recessed in a direction from the second electrode EL2 toward the first electrode EL1. The first protruding portion VP1 and the first recessed portion CP1 may be alternately arranged on the first electrode EL1 along the first direction DR1.

[0112] Furthermore, the second electrode EL2 may include a second protruding portion VP2 that protrudes toward the first electrode EL1 in a plan view (e.g., the second protruding portion VP2 may protrude toward the first electrode EL1 in a negative second direction DR2) and a second recessed portion CP2 that is recessed in a direction opposite to the direction in which the second protruding portion VP2 protrudes (e.g., the second recessed portion CP2 may be recessed away from the first electrode EL1 in a positive second direction DR2). Based on the second direction DR2, the second protruding portion VP2 may protrude in a direction from the second electrode EL2 toward the first electrode EL1, and the second recessed portion CP2 may be recessed in a direction from the first electrode EL1 toward the second electrode EL2. The second protruding portion VP2 and the second recessed portion CP2 may be alternately arranged on the second electrode EL2 along the first direction DR1.

[0113] The first protruding portion VP1 and the first recessed portion CP1 are arranged alternately along the first electrode EL1 in the first direction DR1, and the second protruding portion VP2 and the second recessed portion CP2 are arranged alternately along the second electrode EL2 in the first direction DR1. Therefore, the alignment of the light-emitting element LD between the first electrode EL1 and the second electrode EL2 can be improved.

[0114] In an embodiment of the present invention, the first recessed portion CP1 and the second recessed portion CP2 may be arranged alternately along the first direction DR1, and the first protruding portion VP1 and the second protruding portion VP2 may be arranged alternately along the first direction DR1.

[0115] Reference Figure 4The first protruding portion VP1 may face the second recessed portion CP2 (e.g., the first protruding portion VP1 and the second recessed portion CP2 may be aligned or substantially aligned with each other in the second direction DR2), and the second protruding portion VP2 may face the first recessed portion CP1 (e.g., the second protruding portion VP2 and the first recessed portion CP1 may be aligned or substantially aligned with each other in the second direction DR2).

[0116] Figure 4 An embodiment is shown in which the shapes of the first recessed portion CP1 and the second protruding portion VP2 facing each other correspond to each other, and the shapes of the second recessed portion CP2 and the first protruding portion VP1 facing each other correspond to each other. However, in other embodiments, the shapes of the first recessed portion CP1 and the second protruding portion VP2 may be different from each other, and the shapes of the second recessed portion CP2 and the first protruding portion VP1 may be different from each other.

[0117] like Figure 4 As shown, when the first recessed portion CP1 and the second protruding portion VP2 face each other and an alignment signal (described in more detail below) is applied to the first electrode EL1 and the second electrode EL2, the electric field is concentrated between the first recessed portion CP1 and the second protruding portion VP2, and the light-emitting element LD can be effectively arranged between the first recessed portion CP1 and the second protruding portion VP2.

[0118] When an alignment signal (e.g., a predetermined alignment signal) is applied to the second electrode EL2, the electric field can be concentrated at the most protruding part (e.g., the end part) of the second protrusion VP2. For example, the electric field can be concentrated at the corner portion of the second protrusion VP2.

[0119] When an alignment signal (e.g., a predetermined alignment signal) is applied to the first electrode EL1, the electric field can be concentrated at the deepest recess of the first recessed portion CP1. For example, the electric field can be concentrated at the corner portion of the first recessed portion CP1. In this case, the first recessed portion CP1 can be positioned along the first direction DR1 between adjacent first protruding portions VP1, and the electric field can be concentrated at the most protruding portion of the first protruding portion VP1 adjacent to the first recessed portion CP1.

[0120] Therefore, when an alignment signal is applied to the first electrode EL1 and the second electrode EL2, a strong electric field is formed between the first recessed portion CP1 and the second protruding portion VP2, which face each other, allowing the light-emitting element (LD) to be effectively arranged between the first recessed portion CP1 and the second protruding portion VP2. Furthermore, because the electric field is concentrated between the first recessed portion CP1 and the second protruding portion VP2, the number of malpositioned LDs can be reduced. As a result, the losses of the LDs (e.g., the number of misaligned and / or ineffective LDs) can be reduced, and the number of LDs disposed per unit area of ​​the substrate SUB (e.g., the number of aligned and / or effective LDs) can be increased.

[0121] Because the second recessed portion CP2 and the first protruding portion VP1 face each other, when the alignment signal is applied to the first electrode EL1 and the second electrode EL2, the electric field is concentrated between the second recessed portion CP2 and the first protruding portion VP1, so that the light-emitting element LD can be effectively arranged between the second recessed portion CP2 and the first protruding portion VP1.

[0122] When an alignment signal is applied to the first electrode EL1, the electric field can be concentrated at the most protruding part of the first protrusion VP1. For example, the electric field can be concentrated at the corner of the first protrusion VP1.

[0123] When an alignment signal (e.g., a predetermined alignment signal) is applied to the second electrode EL2, the electric field can be concentrated at the deepest recess of the second recessed portion CP2. For example, the electric field can be concentrated at the corner portion of the second recessed portion CP2. In this case, the second recessed portion CP2 can be positioned along the first direction DR1 between adjacent second protruding portions VP2, and the electric field can be concentrated at the most protruding portion of the second protruding portion VP2 adjacent to the second recessed portion CP2.

[0124] Therefore, when the alignment signal is applied to the first electrode EL1 and the second electrode EL2, a strong electric field is formed between the second recessed portion CP2 and the first protruding portion VP1 facing each other, so that the light-emitting element LD can be effectively arranged between the second recessed portion CP2 and the first protruding portion VP1.

[0125] In an embodiment of the present invention, the light-emitting element LD can be disposed between the first electrode EL1 and the second electrode EL2. For example... Figures 4 to 5BAs shown, a virtual extension line EXL extending in the first direction DR1 can be provided between the first electrode EL1 and the second electrode EL2. The virtual extension line EXL can pass through a half-point between the first dike BNK1 and the second dike BNK2 based on the second direction DR2 (e.g., it can pass through the middle between the first dike BNK1 and the second dike BNK2). In other cases, the virtual extension line EXL can be provided to extend in the first direction DR1 along the central portion of the insulating pattern INSP.

[0126] The light-emitting element LD may include a first light-emitting element LD1 configured based on the virtual extension line EXL to be close to the first recessed portion CP1 (e.g., aligned with the first recessed portion CP1 in the second direction DR2), and a second light-emitting element LD2 configured to be close to the second recessed portion CP2 (e.g., aligned with the second recessed portion CP2 in the second direction DR2).

[0127] Based on the second direction DR2, one end of the first light-emitting element LD1 can be positioned adjacent to the first recessed portion CP1, and one end of the second light-emitting element LD2 can be positioned adjacent to the second recessed portion CP2. (Refer to...) Figure 4 In the plan view, one end of the first light-emitting element LD1 can be accommodated in the first recessed portion CP1 (e.g., it can be arranged between adjacent first protrusions in the first protrusion VP1 and aligned with the first recessed portion CP1), and one end of the second light-emitting element LD2 can be accommodated in the second recessed portion CP2 (e.g., it can be arranged between adjacent second protrusions in the second protrusion VP2 and aligned with the second recessed portion CP2).

[0128] In an embodiment of the present invention, the first light-emitting element LD1 may be disposed between the first recessed portion CP1 and the second protruding portion VP2, and the second light-emitting element LD2 may be disposed between the second recessed portion CP2 and the first protruding portion VP1.

[0129] like Figures 4 to 5B As shown, based on the second direction DR2, one end of the first light-emitting element LD1 may be adjacent to the first recessed portion CP1, and the other end of the first light-emitting element LD1 may be adjacent to the second protruding portion VP2. Furthermore, based on the second direction DR2, one end of the second light-emitting element LD2 may be adjacent to the second recessed portion CP2, and the other end of the second light-emitting element LD2 may be adjacent to the first protruding portion VP1.

[0130] exist Figure 4The diagram shows two first light-emitting elements (LD1) disposed between a first recessed portion CP1 and a second protruding portion VP2, and one second light-emitting element (LD2) disposed between the first protruding portion VP1 and the second recessed portion CP2. However, the number of first light-emitting elements (LD1) and second light-emitting elements (LD2) is not limited to this. For example, one first light-emitting element (LD1) may be disposed between the first recessed portion CP1 and the second protruding portion VP2, and two second light-emitting elements (LD2) may be disposed between the first protruding portion VP1 and the second recessed portion CP2. Furthermore, three or more first light-emitting elements (LD1) may be disposed between the first recessed portion CP1 and the second protruding portion VP2, and three or more second light-emitting elements (LD2) may be disposed between the first protruding portion VP1 and the second recessed portion CP2. The number of first light-emitting elements (LD1) disposed between the first recessed portion CP1 and the second protruding portion VP2, and the number of second light-emitting elements (LD2) disposed between the first protruding portion VP1 and the second recessed portion CP2, are set differently depending on the resolution of the display device.

[0131] In various embodiments of the present invention, the display element layer DPL may include a first dam BNK1 and a second dam BNK2 disposed on the substrate SUB.

[0132] like Figure 4 As shown, the first dam BNK1 and the second dam BNK2 can be disposed on the substrate SUB to extend along the first direction DR1 and can be spaced apart from each other along the second direction DR2. The first dam BNK1 and the second dam BNK2 can separate the unit light-emitting area.

[0133] The first dam BNK1 and the second dam BNK2 that are adjacent to each other on the substrate SUB can be spaced apart from each other along the second direction DR2. For example, the two first dams BNK1 and the second dam BNK2 that are adjacent to each other on the substrate SUB can be spaced apart by a distance greater than the length of the light-emitting element LD.

[0134] The first dike BNK1 and the second dike BNK2 may comprise an inorganic insulating film made of inorganic materials or an organic insulating film made of organic materials. In some embodiments, the first dike BNK1 and the second dike BNK2 may be a single-layer (or single-film) organic insulating film and / or a single-layer (or single-film) inorganic insulating film, but the invention is not limited thereto. In some embodiments, the first dike BNK1 and the second dike BNK2 may be a multilayer film in which at least one or more organic insulating films and at least one or more inorganic insulating films are stacked on top of each other. However, the materials of the first dike BNK1 and the second dike BNK2 are not limited to the materials of the above embodiments. In some embodiments, the first dike BNK1 and the second dike BNK2 may comprise conductive materials.

[0135] The first embankment BNK1 and the second embankment BNK2 may have a trapezoidal cross-section with a width that narrows towards the top along a third direction DR3, but the first embankment BNK1 and the second embankment BNK2 are not limited to this. As another example, the first embankment BNK1 and the second embankment BNK2 may have curved surfaces such as semicircles or semi-ellipses, and the cross-section has a width that narrows towards the top. In this invention, the shape and / or slope of the first embankment BNK1 and the second embankment BNK2 are not specifically limited, and they can be modified in various suitable ways.

[0136] The embankment pattern can be set in the outer region of the pixel area of ​​each pixel PXL.

[0137] The dam pattern may surround at least one side of the peripheral region of the pixel region included in each of the pixels PXL (or may extend around at least one side of the peripheral region of the pixel region included in each of the pixels PXL). The dam pattern is a structure that defines (or separates) the light-emitting regions of each pixel PXL and adjacent pixels PXL, for example, the dam pattern may be a pixel-defining layer. The dam pattern may be configured to include light-blocking and / or reflective materials to prevent or substantially prevent light leakage within each pixel PXL and between adjacent pixels PXL. In some embodiments, a reflective material layer may be formed on the dam pattern to further improve the light emission (or light extraction) efficiency of each pixel PXL. In some embodiments, the dam pattern may be formed in different layers or in the same layer as the first dam BNK1 and the second dam BNK2.

[0138] Reference Figures 4 to 5B The first electrode EL1 can be disposed on the first embankment BNK1, and the second electrode EL2 can be disposed on the second embankment BNK2. In this case, the first electrode EL1 can have a shape corresponding to the inclination of the first embankment BNK1, and the second electrode EL2 can have a shape corresponding to the inclination of the second embankment BNK2. For example, each of the first electrode EL1 and the second electrode EL2 may include a protruding portion corresponding to the first embankment BNK1 and the second embankment BNK2, and a flat portion corresponding to the substrate SUB.

[0139] In various embodiments of the present invention, the first electrode EL1 and the second electrode EL2 may be reflective electrodes. When the first electrode EL1 and the second electrode EL2 are reflective electrodes, they can guide light emitted from the light-emitting element LD in a direction from the substrate SUB toward the display element layer DPL (e.g., in the front surface direction).

[0140] Each of the first dam BNK1 and the second dam BNK2, as well as the first electrode EL1 and the second electrode EL2, can be used as a reflective member to guide light emitted by the light-emitting element LD in a desired direction to improve the light efficiency of the display device. For example, each of the first dam BNK1 and the second dam BNK2, as well as the first electrode EL1 and the second electrode EL2, can be used as a reflective member to improve the light efficiency of the light-emitting element LD by guiding light emitted from the light-emitting element LD in the direction of the front surface of the display device (e.g., in the image display direction).

[0141] When the first electrode EL1 and the second electrode EL2 are reflective electrodes, they may comprise conductive materials with high light reflectivity. Examples of conductive materials with high light reflectivity include metals such as Ag, Mg, Al, Pt, Pd, Au, Ni, Nd, Ir, Cr, Ti, and alloys thereof.

[0142] In some embodiments, each of the first electrode EL1 and the second electrode EL2 may include a transparent conductive material. The transparent conductive material may include conductive oxides (such as indium tin oxide (ITO), indium zinc oxide (IZO), zinc oxide (ZnO), and indium tin zinc oxide (ITZO)), conductive polymers (such as PEDOT), etc. When each of the first electrode EL1 and the second electrode EL2 includes a transparent conductive material, a separate conductive layer made of (or including) an opaque metal may be additionally included for reflecting light emitted from the light-emitting element LD in the front surface direction of the display device (e.g., the image display direction). However, the material of each of the first electrode EL1 and the second electrode EL2 is not limited to the materials described above.

[0143] In various embodiments of the present invention, the display element layer DPL may include an insulating layer INS covering the first electrode EL1 and the second electrode EL2. For example, the insulating layer INS may be disposed on a surface of the substrate SUB on which the first dam BNK1 and the second dam BNK2, as well as the first electrode EL1 and the second electrode EL2, are disposed. Because the first electrode EL1 and the second electrode EL2 are covered by the insulating layer INS, the first electrode EL1 and the second electrode EL2 are not affected by static electricity introduced from the outside.

[0144] The insulating layer INS can include an organic insulating film, an inorganic insulating film, or an organic insulating film disposed on an inorganic insulating film. The inorganic insulating film can include metal oxides (such as silicon oxide (SiO2)). x ), silicon nitride (SiN) x ), silicon oxynitride (SiON) and aluminum oxide (AlO) xAt least one of the following: The organic insulating film may include an organic insulating material capable of transmitting light. The organic insulating film may be, for example, at least one of polyacrylate resin, epoxy resin, phenolic resin, polyamide resin, polyimide resin, unsaturated polyester resin, polyphenylene ether resin, polyphenylene sulfide resin, and benzocyclobutene resin.

[0145] In various embodiments of the present invention, the insulating layer INS may be formed as (or may include) an inorganic insulating film that protects the light-emitting element LD from the influence of the pixel circuit layer of each pixel PXL, but the present invention is not limited thereto. In some embodiments, the insulating layer INS may be formed as (or may include) an organic insulating film that flattens (e.g., planarizes) the support surface of the light-emitting element LD.

[0146] The light-emitting element (LD) can be disposed on the insulating layer INS between the first electrode EL1 and the second electrode EL2. For example, the light-emitting element LD can be disposed on a different layer from the first electrode EL1 and the second electrode EL2. In embodiments of the present invention, the length of each light-emitting element LD (see...) Figure 1A and Figure 1B The "L" in the figure can be from about 1 μm to about 10 μm. For example, the length L of each light-emitting element LD can be from about 3.5 μm to about 4.5 μm, but the present invention is not limited to this. The length L and diameter of each light-emitting element LD (see Figure 1) can also be used. Figure 1A and Figure 1B The “D” in the LD can be varied to meet the requirements of the display device in which the light-emitting element (LD) will be applied.

[0147] When the length L of each light-emitting element (LD) is approximately 3.5 μm to 4.5 μm, the spacing (or area) between the first electrode EL1 and the second electrode EL2 at the location where the light-emitting element (LD) is disposed can be the same as or greater than the length L of each light-emitting element (LD). For example, the spacing between the first protruding portion VP1 of the first electrode EL1 and the second recessed portion CP2 of the second electrode EL2 can be the same as or approximately 0.5 μm greater than the length L of each light-emitting element (LD).

[0148] In embodiments of the present invention, "formed and / or disposed on the same layer" means formed in the same process (or during the same process), and "formed and / or disposed on another layer" means formed in different processes (or during different processes).

[0149] like Figures 4 to 5B As shown, the display element layer DPL may include an insulating pattern INSP disposed on the light-emitting element LD. The insulating pattern INSP can prevent or substantially prevent the light-emitting element LD disposed between the first electrode EL1 and the second electrode EL2 from moving from its arranged position.

[0150] The insulating pattern INSP can be configured to extend along the first direction DR1. The insulating pattern INSP can be partially superimposed on the light-emitting element LD to expose one end and the other end of the light-emitting element LD. The insulating pattern INSP can be made of a transparent insulating material, such that light emitted from the light-emitting element LD can be transmitted through the insulating pattern INSP without loss or with substantial loss.

[0151] The insulating pattern INSP can be formed as a single film or as multiple films (e.g., as a multilayer film), and can include an inorganic insulating film containing at least one inorganic material or an organic insulating film containing at least one organic material. The insulating pattern INSP can also fix each of the light-emitting elements LD arranged in the light-emitting area of ​​each pixel PXL.

[0152] In embodiments of the present invention, the insulating pattern INSP may include an inorganic insulating film that protects the active layer 12 of each of the light-emitting elements (LDs) from external oxygen and moisture. However, the present invention is not limited thereto. Depending on the design conditions of the display device in which the light-emitting elements (LDs) are applied, the insulating pattern INSP may include an organic insulating film containing organic materials.

[0153] When there is an empty gap (or space) between the insulating layer INS and the light-emitting element LD along the third direction DR3 before the insulating pattern INSP is formed, the empty gap can be filled with the insulating pattern INSP during the process of forming the insulating pattern INSP. Therefore, the insulating pattern INSP can be formed as an organic insulating film that can fill the empty gap between the insulating layer INS and the light-emitting element LD.

[0154] In various embodiments of the present invention, the display element layer DPL may include a first contact electrode CNT1 electrically connected to a first electrode EL1 and a second contact electrode CNT2 electrically connected to a light-emitting element LD.

[0155] like Figure 5A and Figure 5B As shown, the first contact electrode CNT1, the second contact electrode CNT2, and the light-emitting element LD can be disposed on the insulating layer INS. The first contact electrode CNT1 and the first electrode EL1 can be connected to each other through a contact opening (e.g., a contact hole) penetrating the insulating layer INS, and the second contact electrode CNT2 and the second electrode EL2 can be connected to each other through another contact opening (e.g., another contact hole) penetrating the insulating layer INS.

[0156] exist Figure 5A and Figure 5BIn this embodiment, the first contact electrode CNT1 and the second contact electrode CNT2 are shown disposed in the same layer on the insulating layer INS. However, in other embodiments, the first contact electrode CNT1 and the second contact electrode CNT2 may be disposed in different layers. When the first contact electrode CNT1 and the second contact electrode CNT2 are disposed in different layers, a separate insulating film may be disposed between the first contact electrode CNT1 and the second contact electrode CNT2.

[0157] The first contact electrode CNT1 can be disposed at one end of the light-emitting element LD exposed by the insulating pattern INSP, and the second contact electrode CNT2 can be disposed at the other end of the light-emitting element LD. Thus, the light-emitting element LD can be electrically connected to the first electrode EL1 and the second electrode EL2.

[0158] Furthermore, the first contact electrode CNT1 and the second contact electrode CNT2 can also be disposed on the insulating pattern INSP. For example, the first contact electrode CNT1 and the second contact electrode CNT2 can be spaced apart from each other on the insulating pattern INSP. Since the first contact electrode CNT1 and the second contact electrode CNT2 are disposed on the insulating pattern INSP, the position of the light-emitting element LD disposed between the first electrode EL1 and the second electrode EL2 can be more stably fixed.

[0159] The first contact electrode CNT1 and the second contact electrode CNT2 comprise at least one of a variety of suitable transparent conductive materials and / or may include ITO, IZO, and ITZO, and may be implemented as substantially transparent or transmissive to meet a reference light transmittance (e.g., a predetermined light transmittance). However, the materials of the first contact electrode CNT1 and the second contact electrode CNT2 are not limited to the materials of the above embodiments. In some embodiments, the first contact electrode CNT1 and the second contact electrode CNT2 may be made of a variety of suitable opaque conductive materials.

[0160] The first contact electrode CNT1 and the second contact electrode CNT2 may be made of a transparent conductive material (or may include a transparent conductive material) so that light emitted from each of the light-emitting elements LD can be transmitted without loss or with substantial loss.

[0161] In various embodiments of the present invention, the area of ​​the first contact electrode CNT1 stacked with the first light-emitting element LD1 can be larger than the area of ​​the second contact electrode CNT2 stacked with the first light-emitting element LD1. For example... Figure 4 and Figure 5AAs shown, the first light-emitting element LD1 can be positioned near the first recessed portion CP1 based on the virtual extension line EXL. Therefore, the area at which the first contact electrode CNT1 covers one end of the first light-emitting element LD1 can be larger than the area at which the second contact electrode CNT2 covers the other end of the first light-emitting element LD1.

[0162] In various embodiments of the present invention, the area of ​​the first contact electrode CNT1 stacked with the second light-emitting element LD2 may be smaller than the area of ​​the second contact electrode CNT2 stacked with the second light-emitting element LD2.

[0163] like Figure 4 and Figure 5B As shown, the second light-emitting element LD2 can be positioned near the second recessed portion CP2 based on the virtual extension line EXL. Therefore, the area at which the first contact electrode CNT1 covers one end of the second light-emitting element LD2 can be smaller than the area at which the second contact electrode CNT2 covers the other end of the second light-emitting element LD2.

[0164] In various embodiments of the present invention, each of the pixels PXL may be configured with the first dam BNK1 and the second dam BNK2, the first electrode EL1 and the second electrode EL2, the light-emitting element LD, the insulating pattern INSP, and the first contact electrode CNT1 and the second contact electrode CNT2 as described above.

[0165] In various embodiments of the present invention, the display element layer DPL may include an encapsulation layer (e.g., encapsulation layer) INC disposed on one surface of the substrate SUB, with the first electrode EL1 and the second electrode EL2, the first contact electrode CNT1 and the second contact electrode CNT2, and the light-emitting element LD disposed on said surface. The encapsulation layer INC may cover the first electrode EL1 and the second electrode EL2, the first contact electrode CNT1 and the second contact electrode CNT2, and the light-emitting element LD to prevent them from being exposed to the outside, thereby preventing or substantially preventing them from being corroded. The encapsulation layer INC may include a transparent insulating material to transmit light. The transparent insulating material may include organic and / or inorganic materials. For example, the encapsulation layer INC may be made of a transparent conductive material (such as IZO) (or may include a transparent conductive material (such as IZO)) to reduce or minimize the loss of light emitted from the light-emitting element LD and reflected by the first electrode EL1 and the second electrode EL2 in the image display direction of the display device.

[0166] In various embodiments of the present invention, a cover layer may be disposed on the encapsulation layer INC. The cover layer may be an encapsulation layer that prevents or substantially prevents oxygen, moisture, etc., from penetrating into the light-emitting element LD.

[0167] Figure 6A top view of a display element layer according to another embodiment of the present invention is shown. Specifically, Figure 6 A top view of an embodiment of a display element layer (DPL) is shown, in which a first electrode EL1 and a second electrode EL2 are arranged in a form corresponding to the shapes of a first dam BNK1 and a second dam BNK2.

[0168] Figure 7A It shows along Figure 6 The sectional view taken from line III-III'. Figure 7B It shows along Figure 6 A sectional view taken from line IV-IV'.

[0169] In the display device according to the illustrated embodiment, structures not described in the display device according to the above embodiments or structures different from those described in the display device according to the above embodiments will be primarily described to avoid repetition. Components and / or structures not specifically described in the illustrated embodiments refer to the embodiments described above (e.g., substantially similar to or the same as those described above), and the same reference numerals denote the same constituent elements, and similar reference numerals denote similar constituent elements. This also applies to the embodiments further described below.

[0170] like Figures 6 to 7B As shown, the display element layer DPL according to an embodiment of the present invention may include a first dam BNK1 and a second dam BNK2 disposed on a substrate SUB, a first electrode EL1 and a second electrode EL2, an insulating layer INS, a light-emitting element LD, an insulating pattern INSP, a first contact electrode CNT1 and a second contact electrode CNT2.

[0171] In an embodiment of the invention, in a plan view, the first dike BNK1 may include a first dike protruding portion BVP1 that protrudes toward the second dike BNK2 (e.g., protrudes toward the second dike BNK2) and a first dike recessed portion BCP1 that is recessed (e.g., sunken) in a direction opposite to the direction of the first dike protruding portion BVP1. Based on a second direction DR2, the first dike protruding portion BVP1 may protrude in a direction from the first dike BNK1 toward the second dike BNK2, and the first dike recessed portion BCP1 may be configured to be recessed in a direction from the second dike BNK2 toward the first dike BNK1. The first dike protruding portion BVP1 and the first dike recessed portion BCP1 may be alternately arranged in the first dike BNK1 along a first direction DR1.

[0172] Furthermore, in the plan view, the second dike BNK2 may include a second dike protruding portion BVP2 that protrudes toward the first dike BNK1 (e.g., protruding towards the first dike BNK1) and a second dike recessed portion BCP2 that is recessed (e.g., sunken) in a direction opposite to the direction of the protrusion of the second dike protruding portion BVP2. Based on the second direction DR2, the second dike protruding portion BVP2 may protrude in a direction from the second dike BNK2 toward the first dike BNK1, and the second dike recessed portion BCP2 may be configured to be recessed in a direction from the first dike BNK1 toward the second dike BNK2. The second dike protruding portion BVP2 and the second dike recessed portion BCP2 may be alternately arranged in the second dike BNK2 along the first direction DR1.

[0173] like Figure 6 As shown, the first embankment recess BCP1 and the second embankment recess BCP2 can be arranged alternately along the first direction DR1, and the first embankment protrusion BVP1 and the second embankment protrusion BVP2 can be arranged alternately along the first direction DR1. Furthermore, the first embankment protrusion BVP1 can face the second embankment recess BCP2 (e.g., the first embankment protrusion BVP1 can be aligned or substantially aligned with the second embankment recess BCP2 in the second direction DR2), and the second embankment protrusion BVP2 can face the first embankment recess BCP1 (e.g., the second embankment protrusion BVP2 can be aligned or substantially aligned with the first embankment recess BCP1 in the second direction DR2).

[0174] In an embodiment of the present invention, in a plan view, the shape of the first electrode EL1 can correspond to the shape of the first dam BNK1, and the shape of the second electrode EL2 can correspond to the shape of the second dam BNK2. (Refer to...) Figures 6 to 7B The first electrode EL1 can be set on the first dam BNK1, and the second electrode EL2 can be set on the second dam BNK2.

[0175] The first electrode EL1 can be disposed on the first dam BNK1, such that the first protruding portion VP1 is superimposed on the first dam protruding portion BVP1 and has a shape corresponding to the planar shape of the first dam protruding portion BVP1, and the first recessed portion CP1 is superimposed on the first dam recessed portion BCP1 and has a shape corresponding to the planar shape of the first dam recessed portion BCP1.

[0176] The second electrode EL2 can be disposed on the second embankment BNK2, such that the second protruding portion VP2 is superimposed on the second embankment protruding portion BVP2 and has a shape corresponding to the planar shape of the second embankment protruding portion BVP2, and the second recessed portion CP2 is superimposed on the second embankment recessed portion BCP2 and has a shape corresponding to the planar shape of the second embankment recessed portion BCP2.

[0177] In an embodiment of the present invention, the light-emitting element LD may include a first light-emitting element LD1 configured based on the virtual extension line EXL and positioned close to the first recessed portion CP1 and the first embankment recessed portion BCP1, and a second light-emitting element LD2 configured close to the second recessed portion CP2 and the second embankment recessed portion BCP2.

[0178] like Figures 6 to 7B As shown, one end of the first light-emitting element LD1 can be positioned adjacent to the first recessed portion CP1 and the first embankment recessed portion BCP1 based on the second direction DR2, and one end of the second light-emitting element LD2 can be positioned adjacent to the second recessed portion CP2 and the second embankment recessed portion BCP2. (Refer to...) Figure 6 In the plan view, one end of the first light-emitting element LD1 can be accommodated in the first recessed portion CP1 and the first embankment recessed portion BCP1, and one end of the second light-emitting element LD2 can be accommodated in the second recessed portion CP2 and the second embankment recessed portion BCP2.

[0179] In embodiments of the present invention, a first light-emitting element LD1 may be disposed between a first recessed portion CP1 and a second protruding portion VP2. For example, the first light-emitting element LD1 may be positioned between the first recessed portion BCP1 and the second protruding portion BVP2. Furthermore, a second light-emitting element LD2 may be disposed between the second recessed portion CP2 and the first protruding portion VP1. For example, the second light-emitting element LD2 may be positioned between the second recessed portion BCP2 and the first protruding portion BVP1.

[0180] like Figures 6 to 7B As shown, one end of the first light-emitting element LD1 can be adjacent to the first recessed portion CP1 and the first embankment recessed portion BCP1 based on the second direction DR2, and the other end of the first light-emitting element LD1 can be adjacent to the second protruding portion VP2 and the second embankment protruding portion BVP2 based on the second direction DR2. Furthermore, one end of the second light-emitting element LD2 can be adjacent to the second recessed portion CP2 and the second embankment recessed portion BCP2 based on the second direction DR2, and the other end of the second light-emitting element LD2 can be adjacent to the first protruding portion VP1 and the first embankment protruding portion BVP1 based on the second direction DR2.

[0181] Figure 8 A top view of a display element layer according to another embodiment of the present invention is shown. Figure 9A It shows along Figure 8 A cross-sectional view taken by line V-V'. Figure 9B It shows along Figure 8 A cross-sectional view taken along line VI-VI'. Specifically, Figure 9A and Figure 9BCross-sectional views are shown for embodiments of a display element layer DPL, including an insulating layer INS in which a portion of AG is formed.

[0182] like Figures 8 to 9B As shown, the display element layer DPL according to an embodiment of the present invention may include a first dam BNK1 and a second dam BNK2 disposed on a substrate SUB, a first electrode EL1 and a second electrode EL2, an insulating layer INS, a light-emitting element LD, an insulating pattern INSP, a first contact electrode CNT1 and a second contact electrode CNT2.

[0183] In an embodiment of the present invention, the receiving portion AG of the insulating layer INS can be recessed along the third direction DR3 from the display element layer DPL toward the substrate SUB and can be disposed between the first electrode EL1 and the second electrode EL2. The light-emitting element LD can be disposed on the receiving portion AG between the first electrode EL1 and the second electrode EL2.

[0184] exist Figure 8 In the diagram, the receiving portion AG is shown as being continuously disposed between the first electrode EL1 and the second electrode EL2 along the first direction DR1, but the shape of the receiving portion AG is not limited thereto. For example, in other embodiments, the receiving portion AG may include sub-receiving portions spaced apart from each other along the first direction DR1. In such an embodiment, the first sub-receiving portion may be disposed between the first protruding portion VP1 and the second recessed portion CP2, and the second sub-receiving portion may be disposed between the first recessed portion CP1 and the second protruding portion VP2, and the first and second sub-receiving portions may be spaced apart from each other along the first direction DR1.

[0185] like Figure 9A and Figure 9B As shown, the thickness of the insulating layer INS at the receiving portion AG can be thinner than other portions of the insulating layer INS. For example, the insulating layer INS can have a thickness gradient between the first electrode EL1 and the second electrode EL2.

[0186] By forming a receiving portion AG between the first electrode EL1 and the second electrode EL2, the light-emitting element LD can be more effectively arranged between the first electrode EL1 and the second electrode EL2. For example, by setting the receiving portion AG in the insulating layer INS between the first electrode EL1 and the second electrode EL2, the light-emitting element LD can be stably positioned (e.g., pre-positioned) in the receiving portion AG during the process of arranging the light-emitting element LD therein. As a result, the number of unarranged light-emitting element LDs remaining on the first diaphragm BNK1 and the second diaphragm BNK2 can be reduced, and more light-emitting element LDs can be arranged between the first electrode EL1 and the second electrode EL2.

[0187] In an embodiment of the invention, the thickness h1 of the insulating layer INS at the receiving portion AG on the third-direction DR3 can be less than or equal to half the thickness h2 of the first dike BNK1 and the second dike BNK2 on the third-direction DR3. (Refer to...) Figure 9A The insulating layer INS at the receiving portion AG can have a thickness h1 on the third-direction DR3. Typically, the thickness h1 of the insulating layer INS at the receiving portion AG is determined based on the thickness of the first dike BNK1, but it can also be determined based on the deposition thickness of the insulating layer INS and the degree of etching (e.g., etching depth) of the etching process used to form the receiving portion AG. For example, the thickness h1 of the insulating layer INS at the receiving portion AG can be from about 1.5 μm to about 2 μm, but the invention is not limited thereto. In some embodiments, the receiving portion AG can be located below the upper surface of the first dike BNK1 to improve the reflectivity of light emitted from each light-emitting element LD disposed on the receiving portion AG.

[0188] The width of the receiving portion AG in the second direction DR2 can be smaller than the interval between the first protrusion VP1 of the first electrode EL1 and the second recess CP2 of the second electrode EL2. For example, the width of the receiving portion AG in the second direction DR2 can be smaller than the length of each light-emitting element LD (see...). Figure 1A and Figure 1B The “L” in the figure is larger and can be smaller than the gap between the first protruding portion VP1 of the first electrode EL1 and the second recessed portion CP2 of the second electrode EL2.

[0189] Furthermore, the first dike BNK1 may have a thickness h2 in the third direction DR3. In this case, the thickness of the second dike BNK2 may be equal to (or substantially equal to) the thickness h2 of the first dike BNK1.

[0190] As described above, the thickness h1 of the insulating layer INS at the receiving portion AG is equal to or less than half the thickness h2 of the first dam BNK1 and the second dam BNK2 on the third direction DR3, thereby allowing the light-emitting element LD to be positioned more effectively in the receiving portion AG. As a result, the alignment of the light-emitting element LD between the first electrode EL1 and the second electrode EL2 can be improved, and the number of light-emitting elements LD disposed in areas other than the region between the first electrode EL1 and the second electrode EL2 can be reduced.

[0191] When the thickness h2 of the first dike BNK1 is smaller than the thickness of the second dike BNK2, the thickness h1 of the insulating layer INS at the accommodating portion AG can be equal to or less than half the thickness h2 of the first dike BNK1.

[0192] Figure 10A top view of a display element layer according to another embodiment of the present invention is shown. Specifically, Figure 10 A top view is shown of an embodiment in which a third light-emitting element LD3 is disposed between a first recessed portion CP1 and a second sub-recessed portion SCP2-2 in a display element layer DPL.

[0193] Reference Figure 10 According to an embodiment of the present invention, the display element layer DPL may include a first dam BNK1 and a second dam BNK2 disposed on a substrate SUB, a first electrode EL1 and a second electrode EL2, an insulating layer INS, a light-emitting element LD, an insulating pattern INSP, a first contact electrode CNT1 and a second contact electrode CNT2.

[0194] In an embodiment of the present invention, the second recessed portion CP2 may include a first sub-recessed portion SCP2-1 arranged alternately with the first recessed portion CP1 along the first direction DR1 and a second sub-recessed portion SCP2-2 disposed in a local region of the second electrode EL2 facing the first recessed portion CP1 (for example, the second sub-recessed portion SCP2-2 is aligned or substantially aligned with the first recessed portion CP1 in the second direction DR2).

[0195] The second protruding portion VP2 may include a first sub-protruding portion SVP2-1 disposed along the first direction DR1 between the first sub-recessed portion SCP2-1 and a second sub-protruding portion SVP2-2 disposed between the first sub-recessed portion SCP2-1 and the second sub-recessed portion SCP2-2.

[0196] like Figure 10 As shown, because the second sub-recessed portion SCP2-2 and the second sub-protruding portion SVP2-2 are located in the region of the second electrode EL2 facing the first recessed portion CP1, the degree of alignment of the light-emitting element LD between the first electrode EL1 and the second electrode EL2 can be improved.

[0197] When the second sub-recessed portion SCP2-2 and the second sub-protruding portion SVP2-2 are disposed in the region of the second electrode EL2 facing the first recessed portion CP1, the most prominent portion (e.g., the corner portion) of the second sub-protruding portion SVP2-2 at the location of electric field concentration can be further disposed in the region facing the first recessed portion CP1. Therefore, the light-emitting element LD can be more effectively arranged between the first recessed portion CP1 of the first electrode EL1 and the region of the second electrode EL2 facing the first recessed portion CP1.

[0198] The light-emitting element LD may include a third light-emitting element LD3 disposed between the first recessed portion CP1 and the second sub-recessed portion SCP2-2. (See reference...) Figure 10The first light-emitting element LD1 can be disposed between the first recessed portion CP1 and the second sub-protruding portion SVP2-2, and between the first recessed portion CP1 and the first sub-protruding portion SVP2-1. The second light-emitting element LD2 can be disposed between the first protruding portion VP1 and the first sub-recessed portion SCP2-1. The third light-emitting element LD3 can be disposed between the first recessed portion CP1 and the second sub-recessed portion SCP2-2.

[0199] Figures 11A to 11D A top view of a display element layer according to various embodiments of the present invention is shown. Specifically, Figures 11A to 11D A top view is shown of an embodiment of a display element layer DPL including a first protrusion VP1 and a second protrusion VP2 having various shapes.

[0200] exist Figures 11A to 11D In the plan view, the shapes of the first dam BNK1 and the second dam BNK2 do not correspond to the shapes of the first electrode EL1 and the second electrode EL2 (e.g., they are different from the shapes of the first electrode EL1 and the second electrode EL2), but in various other embodiments, the shapes of the first dam BNK1 and the second dam BNK2 may correspond to the shapes of the first electrode EL1 and the second electrode EL2 in the plan view.

[0201] Reference Figures 11A to 11D According to an embodiment of the present invention, the display element layer DPL may include a first dam BNK1 and a second dam BNK2 disposed on a substrate SUB, a first electrode EL1 and a second electrode EL2, an insulating layer INS, a light-emitting element LD, an insulating pattern INSP, a first contact electrode CNT1 and a second contact electrode CNT2.

[0202] The first protrusion VP1 and the second protrusion VP2 can have a polygonal shape or a rounded (or circular) curved shape. For example, as Figure 4 As shown, the first protrusion VP1 and the second protrusion VP2 can have a quadrilateral shape. Figure 11A As shown, the first protrusion VP1 and the second protrusion VP2 can have an M-shape. In this embodiment, the electric field can be concentrated at the apex of the most prominent portion of the first protrusion VP1 and the second protrusion VP2, which have an M-shape.

[0203] Reference Figure 11B The first protrusion VP1 and the second protrusion VP2 can have a semi-hexagonal shape. For example... Figure 11C As shown, the first protrusion VP1 and the second protrusion VP2 can have a semi-circular shape. Furthermore, as... Figure 11D As shown, the first protrusion VP1 and the second protrusion VP2 may have a rounded shape.

[0204] However, the shapes of the first protrusion VP1 and the second protrusion VP2 are not limited to the shapes described above and can be modified in various ways according to the design of the display device. Each of the first protrusion VP1 and the second protrusion VP2 may have a shape including a non-square (or non-standard) boundary that is not a standard shape. In this case, the first electrode EL1 including the first protrusion VP1 and the second electrode EL2 including the second protrusion VP2 may have non-uniform widths along the extension direction (e.g., the elongation direction) in a plan view. For example, the first electrode EL1 and the second electrode EL2 may have at least two or more widths (e.g., two or more different widths) along the extension direction. In this case, the region between the first electrode EL1 and the second electrode EL2 (e.g., the region where the light-emitting element LD is disposed) may have at least two or more widths (e.g., non-constant widths) along the extension direction of the first electrode EL1 and the second electrode EL2.

[0205] Figure 12 A cross-sectional view of a display device according to an embodiment of the present invention is shown. Specifically, Figure 12 A cross-sectional view of a display device including a display element layer DPL is shown. In the display element layer DPL, the first electrode EL1 and the second electrode EL2 correspond in shape to the first dam BNK1 and the second dam BNK2. The receiving portion AG is formed in the insulating layer INS between the first electrode EL1 and the second electrode EL2.

[0206] like Figure 12 As shown, the display device may include a substrate SUB, a pixel circuit layer PCL, and a display element layer DPL.

[0207] The pixel circuit layer PCL may include a buffer layer BFL, a first transistor T1, a second transistor T2, and a driving voltage line DVL.

[0208] A buffer layer BFL can be disposed on one surface (e.g., the top surface) of the substrate SUB. The buffer layer BFL can prevent or substantially prevent impurities from diffusing into the first transistor T1 and the second transistor T2. The buffer layer BFL can be a single layer or a multilayer comprising two or more layers. When a multilayer buffer layer BFL is disposed, each layer can be formed of the same material or different materials. In some embodiments, the buffer layer BFL may be omitted depending on the material and process conditions of the substrate SUB.

[0209] The first transistor T1 can be a driving transistor electrically connected to the light-emitting element LD to drive the light-emitting element LD. The second transistor T2 can be a switching transistor electrically connected to the first transistor T1 to switch the first transistor T1 on and off.

[0210] Each of the first transistor T1 and the second transistor T2 may include a semiconductor layer SCL, a gate electrode GE, a source electrode SE, and a drain electrode DE.

[0211] The semiconductor layer SCL can be disposed on the buffer layer BFL. The semiconductor layer SCL may include a source region and a drain region that respectively contact the corresponding source electrode SE and drain electrode DE. The region between the source and drain regions can be a channel region. The semiconductor layer SCL can be a semiconductor pattern made of polycrystalline silicon, amorphous silicon, oxide semiconductors, etc. (or including polycrystalline silicon, amorphous silicon, oxide semiconductors, etc.). The channel region can be a semiconductor pattern doped with impurities. For example, n-type impurities, p-type impurities, and other metals can be used as impurities.

[0212] The gate electrode GE can be disposed on the corresponding semiconductor layer SCL, and the first gate insulating film GI1 is between the gate electrode GE and the semiconductor layer SCL.

[0213] The source electrode SE and drain electrode DE included in the first transistor T1 can be connected to the source and drain regions of the corresponding semiconductor layer SCL respectively through contact openings (e.g., contact holes) through the second gate insulating film GI2 and the first gate insulating film GI1.

[0214] The source electrode SE and drain electrode DE included in the second transistor T2 can be connected to the source and drain regions of the corresponding semiconductor layer SCL respectively by penetrating the contact openings (e.g., contact holes) through the second gate insulating film GI2 and the first gate insulating film GI1.

[0215] The drive voltage line DVL can be located on the interlayer insulating layer (ILD), but its location is not limited to this. The drive voltage line DVL can be connected to a second drive power supply (VSS), and a signal corresponding to the drive voltage can be supplied from the driver to the drive voltage line DVL.

[0216] The pixel circuit layer PCL may further include a passivation layer PSV covering the first transistor T1 and the second transistor T2. The passivation layer PSV may have a structure comprising an organic insulating film, an inorganic insulating film, and / or an organic insulating film disposed on an inorganic insulating film. Here, the inorganic insulating film may include a metal oxide (such as silicon oxide (SiO2)). x ), silicon nitride (SiN) x ), silicon oxynitride (SiON) and aluminum oxide (AlO) x At least one of the following: The organic insulating film may include an organic insulating material capable of transmitting light (e.g., a transparent organic insulating material). The organic insulating film may be at least one of, for example, polyacrylate resin, epoxy resin, phenolic resin, polyamide resin, polyimide resin, unsaturated polyester resin, polyphenylene ether resin, polyphenylene sulfide resin, and / or benzocyclobutene resin.

[0217] Furthermore, although transistors T1 and T2 have been described as thin-film transistors with a top-gate structure, the present invention is not limited thereto. In some embodiments, transistors T1 and T2 may be thin-film transistors with a bottom-gate structure.

[0218] Figure 12 A first light-emitting element LD1 is shown, positioned near the first recessed portion CP1 based on a virtual extension line EXL. The first light-emitting element LD1, originating from the light-emitting element LD, will be described primarily below.

[0219] Reference Figure 12 The display element layer DPL may include a first dam BNK1 and a second dam BNK2, a first electrode EL1 and a second electrode EL2, an insulating layer INS, a first light-emitting element LD1, an insulating pattern INSP, and a first contact electrode CNT1 and a second contact electrode CNT2.

[0220] The first electrode EL1 can be disposed on the first dam BNK1, and the second electrode EL2 can be disposed on the second dam BNK2. In this embodiment, the shape of the first electrode EL1 can correspond to the shape of the first dam BNK1, and the shape of the second electrode EL2 can correspond to the shape of the second dam BNK2.

[0221] The first electrode EL1 may include a first protruding portion VP1 and a first recessed portion CP1 arranged alternately along the first direction DR1, and the second electrode EL2 may include a second protruding portion VP2 and a second recessed portion CP2 arranged alternately along the first direction DR1.

[0222] The first dike BNK1 may include a first dike protrusion BVP1 and a first dike recess BCP1 arranged alternately along the first direction DR1, and the second dike BNK2 may include a second dike protrusion BVP2 and a second dike recess BCP2 arranged alternately along the first direction DR1.

[0223] A first electrode EL1 can be disposed on a first dam BNK1, such that the first protruding portion VP1 of the first electrode EL1 is superimposed on the first dam protruding portion BVP1 and has a shape corresponding to the planar shape of the first dam protruding portion BVP1, and the first recessed portion CP1 of the first electrode EL1 is superimposed on the first dam recessed portion BCP1 and has a shape corresponding to the planar shape of the first dam recessed portion BCP1. A second electrode EL2 can be disposed on a second dam BNK2, such that the second protruding portion VP2 of the second electrode EL2 is superimposed on the second dam protruding portion BVP2 and has a shape corresponding to the planar shape of the second dam protruding portion BVP2, and the second recessed portion CP2 of the second electrode EL2 is superimposed on the second dam recessed portion BCP2 and has a shape corresponding to the planar shape of the second dam recessed portion BCP2.

[0224] One of the first electrode EL1 and the second electrode EL2 can be electrically connected to at least one of a plurality of transistors included in the pixel circuit layer PCL.

[0225] For example, the second electrode EL2 can be electrically connected to the drain electrode DE of the first transistor T1 through a contact opening that penetrates the passivation layer PSV and the interlayer insulating layer ILD. The source electrode SE of the first transistor T1 can be electrically connected to the first drive power supply VDD. Therefore, the second electrode EL2 can receive signals from the first transistor T1.

[0226] The first electrode EL1 can be electrically connected to the drive voltage line DVL through a contact opening penetrating the passivation layer PSV. The drive voltage line DVL can be electrically connected to the second drive power supply VSS. Therefore, the first electrode EL1 can receive signals from the drive voltage line DVL.

[0227] An insulating layer INS can be disposed on one surface of the passivation layer PSV, which has a first dam BNK1, a second dam BNK2, a first electrode EL1, and a second electrode EL2. A first light-emitting element LD1 can be disposed on the insulating layer INS. The insulating layer INS can have a receiving portion AG, which is recessed on the third-direction DR3 from the display element layer DPL toward the substrate SUB (e.g., the receiving portion AG is a recessed portion on the third-direction DR3 from the display element layer DPL toward the substrate SUB), and the first light-emitting element LD1 can be disposed on the receiving portion AG.

[0228] An insulating pattern INSP can be applied to the first light-emitting element LD1 to fix its position. One end and the other end of the first light-emitting element LD1 can be exposed by the insulating pattern INSP.

[0229] The first contact electrode CNT1 and the second contact electrode CNT2 can be disposed on the insulating layer INS. One end of the first light-emitting element LD1 exposed by the insulating pattern INSP can contact the first contact electrode CNT1, and the other end of the first light-emitting element LD1 exposed by the insulating pattern INSP can contact the second contact electrode CNT2. Furthermore, the first contact electrode CNT1 can be connected to the first electrode EL1 through a contact opening penetrating the insulating layer INS, and the second contact electrode CNT2 can be connected to the second electrode EL2 through a contact opening penetrating the insulating layer INS.

[0230] Therefore, the first light-emitting element LD1 can receive a reference voltage (e.g., a predetermined voltage) through the first electrode EL1 and the second electrode EL2. When an electric field of the reference voltage or greater (e.g., the predetermined voltage or greater) is applied to both ends of the first light-emitting element LD1, the first light-emitting element LD1 emits light while electron-hole pairs combine (or recombine) in the active layer 12 of the first light-emitting element LD1.

[0231] Furthermore, since the first contact electrode CNT1 is connected to the first electrode EL1 and the second contact electrode CNT2 is connected to the second electrode EL2, the wiring resistance of each of the first contact electrode CNT1 and the second contact electrode CNT2 is reduced, thereby reducing or minimizing the driving failure of the light-emitting element LD due to signal delay.

[0232] Light emitted from both ends of the first light-emitting element LD1 can be reflected by the first electrode EL1 and the second electrode EL2 to be guided in an upward direction (e.g., the front surface direction) based on the third direction DR3.

[0233] The encapsulation layer INC can be disposed on the passivation layer PSV, and the first electrode EL1, the second electrode EL2, the first contact electrode CNT1, the second contact electrode CNT2, and the light-emitting element LD can be disposed on the passivation layer PSV. The encapsulation layer INC can cover the first electrode EL1, the second electrode EL2, the first contact electrode CNT1, the second contact electrode CNT2, and the light-emitting element LD, so they are not exposed to the outside, thereby preventing or substantially preventing them from being corroded.

[0234] A cover layer can be placed on the encapsulation layer INC. The cover layer can be an encapsulation layer that prevents (or substantially prevents) oxygen, moisture, etc., from penetrating into the light-emitting element LD.

[0235] Figures 13A to 13H This is a top view showing a method for manufacturing a display device according to an embodiment of the present invention. Specifically, Figures 13A to 13HThis is a top view showing a method of manufacturing a display device, in which a first electrode EL1 and a second electrode EL2 are configured to correspond to the shapes of a first dam BNK1 and a second dam BNK2, and the display device includes a display element layer DPL having a receiving portion AG formed between the first electrode EL1 and the second electrode EL2.

[0236] Figures 14A to 14I This is a cross-sectional view sequentially illustrating a method for manufacturing a display device according to an embodiment of the present invention. Specifically, Figures 14A to 14I It shows along Figures 13A to 13H A sectional view taken from line VII-VII'.

[0237] In the following text, reference will be made to Figures 13A to 13H and Figures 14A to 14I A method for manufacturing a display device according to an embodiment of the present invention is described sequentially.

[0238] like Figure 13A and Figure 14A As shown, the first embankment BNK1 and the second embankment BNK2 can be formed on one surface of the substrate SUB to extend along the first direction DR1 and be spaced apart from each other along the second direction DR2.

[0239] Reference Figure 13B and Figure 14B A first dike protruding portion BVP1, which protrudes toward the second dike BNK2 in the plan view (e.g., protruding toward the second dike BNK2), and a first dike recessed portion BCP1, which is recessed in the direction opposite to the direction of the first dike protruding portion BVP1 (e.g., recessed away from the second dike BNK2 and away from the first dike protruding portion BVP1), can be formed in the second dike BNK2. Similarly, a second dike protruding portion BVP2, which protrudes toward the first dike BNK1 in the plan view (e.g., protruding toward the first dike BNK1), and a second dike recessed portion BCP2, which is recessed in the direction opposite to the direction of the second dike protruding portion BVP2 (e.g., recessed away from the first dike BNK1 and away from the second dike protruding portion BVP2), can be formed in the second dike BNK2.

[0240] By using a half-mask, a slot mask, or the like to perform an etching process, a first dike protrusion BVP1 and a first dike recess BCP1 can be formed in a first dike BNK1, and a second dike protrusion BVP2 and a second dike recess BCP2 can be formed in a second dike BNK2. However, the methods for forming the first dike protrusion BVP1, the second dike protrusion BVP2, the first dike recess BCP1, and the second dike recess BCP2 are not limited to these examples.

[0241] The first dike recessed portion BCP1 and the second dike recessed portion BCP2 can be arranged alternately along the first direction DR1, and the first dike protruding portion BVP1 and the second dike protruding portion BVP2 can be arranged alternately along the first direction DR1. Furthermore, the first dike protruding portion BVP1 can face the second dike recessed portion BCP2 (e.g., the first dike protruding portion BVP1 can be aligned or substantially aligned with the second dike recessed portion BCP2 in the second direction DR2), and the second dike protruding portion BVP2 can face the first dike recessed portion BCP1 (e.g., the second dike protruding portion BVP2 can be aligned or substantially aligned with the first dike recessed portion BCP1 in the second direction DR2).

[0242] In other embodiments, the first protruding portion BVP1 and the first recessed portion BCP1 may not be formed in the first dike BNK1, and the second protruding portion BVP2 and the second recessed portion BCP2 may not be formed in the second dike BNK2. Then, the first electrode EL1 and the second electrode EL2 may be formed on the first dike BNK1 and the second dike BNK2, respectively. In such embodiments, it is possible to... Figure 4 The settings shown in the diagram represent the display element layer DPL.

[0243] The following text will mainly describe, such as Figure 13B and Figure 14B The embodiment shown in which a first dike protrusion BVP1 and a first dike recess BCP1 are formed in a first dike BNK1, and a second dike protrusion BVP2 and a second dike recess BCP2 are formed in a second dike BNK2.

[0244] Reference Figure 13C and Figure 14C A first electrode EL1 can be formed on the first dam BNK1, and a second electrode EL2 can be formed on the second dam BNK2. In this embodiment, the first electrode EL1 can be formed on the first dam BNK1 such that the shape of the first electrode EL1 corresponds to the shape of the first dam BNK1. For example, the first electrode EL1 can be formed to have a first protrusion VP1, which overlaps with the first dam protrusion BVP1 and has a shape corresponding to the planar shape of the first dam protrusion BVP1. Alternatively, the first electrode EL1 can be formed to have a first recess CP1, which overlaps with the first dam recess BCP1 and has a shape corresponding to the planar shape of the first dam recess BCP1. Therefore, as... Figure 6 As shown, a display element layer DPL can be configured in which the shapes of the first electrode EL1 and the second electrode EL2 correspond to the shapes of the first dam BNK1 and the second dam BNK2, respectively.

[0245] For example, a first electrode EL1, including a first recessed portion CP1 and a first protruding portion VP1, can be formed on the first dam BNK1 by using a mask having the shape of the first dam BNK1 in a plan view.

[0246] Furthermore, the second electrode EL2 can be formed having a second protrusion VP2, which is stacked with a second embankment protrusion BVP2 and has a shape corresponding to the planar shape of the second embankment protrusion BVP2. Alternatively, the second electrode EL2 can be formed having a second recessed portion CP2, which is stacked with a second embankment recessed portion BCP2 and has a shape corresponding to the planar shape of the second embankment recessed portion BCP2.

[0247] The first recessed portion CP1 and the second recessed portion CP2 can be arranged alternately along the first direction DR1, and the first protruding portion VP1 and the second protruding portion VP2 can be arranged alternately along the first direction DR1. Furthermore, the first protruding portion VP1 can face the second recessed portion CP2 (e.g., it can be aligned or substantially aligned with the second recessed portion CP2), and the second protruding portion VP2 can face the first recessed portion CP1 (e.g., it can be aligned or substantially aligned with the first recessed portion CP1).

[0248] Because the first recessed portion CP1 and the second protruding portion VP2 face each other, and the second recessed portion CP2 and the first protruding portion VP1 face each other, the light-emitting element LD can be effectively arranged between the first electrode EL1 and the second electrode EL2. For example, because the electric field can be concentrated between the second recessed portion CP2 and the first protruding portion VP1, the light-emitting element LD can be effectively arranged between the second recessed portion CP2 and the first protruding portion VP1. Furthermore, because a strong electric field can be formed between the first recessed portion CP1 and the second protruding portion VP2 facing each other, the light-emitting element LD can be effectively arranged between the first recessed portion CP1 and the second protruding portion VP2.

[0249] Reference Figure 13D and Figure 14D An insulating layer INS can be formed on a surface of the substrate SUB on which a first dam BNK1 and a second dam BNK2, as well as a first electrode EL1 and a second electrode EL2, are formed. The first electrode EL1 can cover the first dam BNK1, the second electrode EL2 can cover the second dam BNK2, and the insulating layer INS can cover the first electrode EL1 and the second electrode EL2.

[0250] Reference Figure 13D and Figure 14EA receiving portion AG, recessed towards the substrate SUB on the third-direction DR3, can be formed in the insulating layer INS. In this embodiment, the receiving portion AG can be formed in the portion of the insulating layer INS between the first electrode EL1 and the second electrode EL2. For example, the receiving portion AG can be formed by partially etching the insulating layer INS between the first electrode EL1 and the second electrode EL2 using a slit mask or a halftone mask.

[0251] like Figure 14E As shown, by forming a receiving portion AG in the insulating layer INS between the first electrode EL1 and the second electrode EL2, the light-emitting element LD disposed on the substrate SUB can be easily arranged between the first electrode EL1 and the second electrode EL2. For example, the light-emitting element LD can be pre-positioned (e.g., pre-positioned) between the first electrode EL1 and the second electrode EL2 before applying an alignment signal to the first electrode EL1 and the second electrode EL2, thus making the process of arranging the light-emitting element LD more efficient. Furthermore, the number of light-emitting element LDs positioned on the first diaphragm BNK1 and the second diaphragm BNK2 can be reduced; therefore, the difficulty of subsequent processes can be reduced and the equipment can be kept clean.

[0252] In embodiments of the present invention, the receiving portion AG can be formed such that the thickness of the insulating layer INS at the receiving portion AG on the third-direction DR3 can be equal to or less than half the thickness of the first dam BNK1 and the second dam BNK2 on the third-direction DR3. Therefore, the light-emitting element LD can be more easily disposed between the first electrode EL1 and the second electrode EL2.

[0253] Reference Figure 13E Light-emitting elements (LDs) can be disposed on the insulating layer INS. For example, the LDs can be injected into the light-emitting areas of each pixel PXL by inkjet printing, slot coating, or various other suitable methods. For example, the LDs can be mixed with a volatile solvent and supplied to the light-emitting areas of each pixel PXL by inkjet printing or slot coating.

[0254] For example, inkjet nozzles can be disposed on the insulating layer INS, and a solvent containing multiple light-emitting elements (LDs) can be injected into the light-emitting region of each pixel PXL through the inkjet nozzles. The solvent can be one or more of acetone, water, ethanol, and / or toluene, but the invention is not limited thereto. For example, the solvent can be in the form of ink or paste. The method of inserting the light-emitting elements (LDs) into the light-emitting region of each pixel PXL is not limited to the embodiments described above, and various modifications can be made to the method of inserting the light-emitting elements (LDs).

[0255] The solvent can be removed after the light-emitting element LD is injected into the light-emitting area of ​​each pixel PXL.

[0256] Reference Figure 13F and Figure 14F A light-emitting element LD is arranged between the first electrode EL1 and the second electrode EL2 by applying an alignment signal to the first electrode EL1 and the second electrode EL2.

[0257] The first alignment signal applied to the first electrode EL1 and the second alignment signal applied to the second electrode EL2 may have a voltage difference and / or a phase difference, such that the light-emitting element LD can be arranged between the first electrode EL1 and the second electrode EL2. For example, the first alignment signal and the second alignment signal may have different voltage levels. Furthermore, at least one of the first alignment signal and the second alignment signal may be an AC signal, but the invention is not limited thereto.

[0258] Furthermore, while arranging the light-emitting element (LD), an alignment signal (or alignment voltage) applied to the first electrode EL1 and the second electrode EL2 to form a magnetic field can be controlled, allowing the LD to be arranged to be relatively deflected between the first electrode EL1 and the second electrode EL2 (e.g., facing each other). For example, the LD can be deflected and arranged such that one end of the LD points towards the first electrode EL1 and the other end points towards the second electrode EL2. In other embodiments, the LD can be deflected and arranged such that one end of the LD points towards the second electrode EL2 and the other end points towards the first electrode EL1.

[0259] When an alignment signal is applied to the first electrode EL1 and the second electrode EL2, the first light-emitting element LD1 can be arranged between the first recessed portion CP1 and the second protruding portion VP2, and the second light-emitting element LD2 can be arranged between the second recessed portion CP2 and the first protruding portion VP1.

[0260] Based on the virtual extension line EXL extending in the first direction DR1 between the first electrode EL1 and the second electrode EL2, the first light-emitting element LD1 can be arranged close to the first recessed portion CP1 (e.g., adjacent to or aligned with the first recessed portion CP1 in the second direction DR2), and the second light-emitting element LD2 can be arranged close to the second recessed portion CP2 (e.g., adjacent to or aligned with the second recessed portion CP2 in the second direction DR2).

[0261] Reference Figure 13G and Figure 14GAn insulating pattern INSP can be formed on the light-emitting element LD. The insulating pattern INSP can be continuously disposed on the light-emitting element LD along the first direction DR1 (for example, the insulating pattern INSP can extend continuously across multiple light-emitting elements LD (such as all light-emitting elements LD in a light-emitting area)). The position of the light-emitting element LD disposed between the first electrode EL1 and the second electrode EL2 can be fixed by the insulating pattern INSP.

[0262] Reference Figure 13H and Figure 14H It can form a first contact electrode CNT1 that electrically connects the first electrode EL1 and the light-emitting element LD, and a second contact electrode CNT2 that electrically connects the second electrode EL2 and the light-emitting element LD.

[0263] The first contact electrode CNT1 can be connected to the first electrode EL1 through a contact opening (e.g., a contact hole) through the insulating layer INS and can contact one end of the light-emitting element LD exposed by the insulating pattern INSP. Furthermore, the second contact electrode CNT2 can be connected to the second electrode EL2 through a contact opening (e.g., a contact hole) through the insulating layer INS and can contact the other end of the light-emitting element LD exposed by the insulating pattern INSP. Therefore, the first electrode EL1 and the second electrode EL2 can be electrically connected to the light-emitting element LD.

[0264] Reference Figure 14I An encapsulation layer INC can be formed on one surface of a substrate SUB, on which a first electrode EL1 and a second electrode EL2, a first contact electrode CNT1 and a second contact electrode CNT2, and a light-emitting element LD are disposed.

[0265] The detailed description above illustrates and explains aspects and features of the invention. Furthermore, the detailed description above only shows exemplary embodiments of the invention; the invention can be used in various combinations, modifications, and environments other than those described above, and the scope of the inventive concept disclosed herein can be varied or modified within the scope of equivalents and / or technology or knowledge in the art. Therefore, the detailed description above is not intended to limit the invention to the disclosed embodiments. Moreover, the appended claims should be construed as including their equivalents as well.

Claims

1. A display device, the display device comprising: Base; as well as A display element layer, located on one surface of the substrate, includes: a first electrode and a second electrode extending along a first direction and spaced apart from each other in a second direction different from the first direction; a first dam and a second dam, located on the substrate, extending along the first direction and spaced apart from each other along the second direction; and a light-emitting element electrically connected to the first electrode and the second electrode. The first electrode is located on the first embankment, and the second electrode is located on the second embankment. The first electrode has a first protruding portion that protrudes toward the second electrode in a plan view and a first recessed portion that is recessed in a direction away from the second electrode. The second electrode has a second protruding portion that protrudes toward the first electrode in the plan view and a second recessed portion that is recessed in a direction away from the first electrode. Wherein, based on a virtual extension line extending along the first direction between the first electrode and the second electrode, the light-emitting element includes a first light-emitting element near the first recessed portion and a second light-emitting element near the second recessed portion.

2. The display device according to claim 1, wherein, The first recessed portion and the second recessed portion are arranged alternately along the first direction, and The first protruding portion and the second protruding portion are arranged alternately along the first direction.

3. The display device according to claim 2, wherein, The first protruding portion faces the second recessed portion, and The second protruding portion faces the first recessed portion.

4. The display device according to claim 3, wherein, The first light-emitting element is located between the first recessed portion and the second protruding portion, and The second light-emitting element is located between the second recessed portion and the first protruding portion.

5. The display device according to claim 1, wherein, The display element layer further includes: The first contact electrode is electrically connected to the light-emitting element, and The second contact electrode is electrically connected to the light-emitting element.

6. The display device according to claim 5, wherein, The area at which the first contact electrode overlaps with the first light-emitting element is larger than the area at which the second contact electrode overlaps with the first light-emitting element.

7. The display device according to claim 5, wherein, The area at which the first contact electrode and the second light-emitting element are stacked is smaller than the area at which the second contact electrode and the second light-emitting element are stacked.

8. The display device according to claim 1, wherein, The first dike has a first dike protruding portion that bulges toward the second dike in the plan view and a first dike recessed portion that is recessed in a direction away from the second dike, and The second dike has a protruding portion that protrudes toward the first dike in the plan view and a recessed portion that is recessed in a direction away from the first dike.

9. The display device according to claim 8, wherein, The first protruding portion overlaps with the first embankment protruding portion and has a shape corresponding to the planar shape of the first embankment protruding portion; the first recessed portion overlaps with the first embankment recessed portion and has a shape corresponding to the planar shape of the first embankment recessed portion. The second protruding portion overlaps with the second embankment protruding portion and has a shape corresponding to the planar shape of the second embankment protruding portion; the second recessed portion overlaps with the second embankment recessed portion and has a shape corresponding to the planar shape of the second embankment recessed portion.

10. The display device according to claim 1, wherein, The display element layer further includes an insulating layer covering the first electrode and the second electrode, and The light-emitting element is located on the insulating layer.

11. The display device according to claim 10, wherein, The insulating layer has a receiving portion located between the first electrode and the second electrode and recessed towards the substrate in a third-order direction, and The light-emitting element is located on the receiving portion of the insulating layer.

12. The display device according to claim 11, wherein, The thickness of the insulating layer at the receiving portion in the third direction is equal to or less than half the thickness of the first dike and the second dike in the third direction.

13. The display device according to claim 1, wherein, The second recessed portion has a first sub-recessed portion arranged alternately with the first recessed portion along the first direction and a second sub-recessed portion facing the first recessed portion.

14. The display device according to claim 13, wherein, The light-emitting element further includes a third light-emitting element located between the first recessed portion and the second sub-recessed portion.

15. The display device according to claim 1, wherein, The first protrusion and the second protrusion have a polygonal shape or a rounded curved shape.

16. The display device according to claim 1, wherein, Each of the first electrode and the second electrode has at least two widths along the first direction.

17. The display device according to claim 16, wherein, The first protruding portion and the second protruding portion have non-square boundaries.

18. The display device according to claim 17, wherein, The region between the first electrode and the second electrode has a non-constant width along the first direction.

19. A method for manufacturing a display device, the method comprising: A first dike and a second dike are formed on the base, the first dike and the second dike extending along a first direction and spaced apart from each other along a second direction different from the first direction; A first electrode is formed on the first embankment, and a second electrode is formed on the second embankment. The first electrode has a first protruding portion that protrudes toward the second electrode in a plan view and a first recessed portion that is recessed in a direction away from the second electrode. The second electrode has a second protruding portion that protrudes toward the first electrode in the plan view and a second recessed portion that is recessed in a direction away from the first electrode. After the first electrode and the second electrode are formed, a light-emitting element is disposed on the substrate; as well as The light-emitting element is arranged between the first electrode and the second electrode by applying an alignment signal to the first electrode and the second electrode. The arranged light-emitting element includes a first light-emitting element near the first recessed portion and a second light-emitting element near the second recessed portion.

20. The method of manufacturing a display device according to claim 19, wherein, The steps for forming the first dike and the second dike include: The first dike has a first dike protruding portion that bulges toward the second dike in the plan view and a first dike recessed portion that is recessed in a direction away from the second dike; and The second dike has a protruding portion that bulges toward the first dike in the plan view and a recessed portion that is recessed in a direction away from the first dike.

21. The method of manufacturing a display device according to claim 19, further comprising: An insulating layer is formed covering the first electrode and the second electrode, and A receiving portion is formed in the insulating layer between the first electrode and the second electrode, the receiving portion being recessed toward the substrate in a third-direction upward direction.

22. The method of manufacturing a display device according to claim 19, the method further comprising forming a first contact electrode electrically connecting the first electrode and the light-emitting element and a second contact electrode electrically connecting the second electrode and the light-emitting element.

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